EP1686265A2 - Öl- Zahnradpumpe - Google Patents

Öl- Zahnradpumpe Download PDF

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Publication number
EP1686265A2
EP1686265A2 EP06001755A EP06001755A EP1686265A2 EP 1686265 A2 EP1686265 A2 EP 1686265A2 EP 06001755 A EP06001755 A EP 06001755A EP 06001755 A EP06001755 A EP 06001755A EP 1686265 A2 EP1686265 A2 EP 1686265A2
Authority
EP
European Patent Office
Prior art keywords
oil
valve
working oil
discharge
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06001755A
Other languages
English (en)
French (fr)
Other versions
EP1686265A3 (de
Inventor
Hiroshi Aisin Seiki K.K. Kato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aisin Corp
Original Assignee
Aisin Seiki Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aisin Seiki Co Ltd filed Critical Aisin Seiki Co Ltd
Publication of EP1686265A2 publication Critical patent/EP1686265A2/de
Publication of EP1686265A3 publication Critical patent/EP1686265A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/16—Controlling lubricant pressure or quantity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/18—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2270/00—Control; Monitoring or safety arrangements
    • F04C2270/58—Valve parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/04—Thermal properties
    • F05C2251/042—Expansivity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
    • F05C2251/00—Material properties
    • F05C2251/08—Shape memory

Definitions

  • the disclosed oil pump includes a pump main body 101 having a pump chamber 110, a rotor 102 rotating in the pump chamber 110 by means of a drive source, an inlet port 136 sucking the working oil into the pump chamber 110 in response to a rotation of the rotor 102, first and second outlet ports 131 and 132 discharging the working oil out of the pump chamber 110 in response to the rotation of the rotor 102, a first oil passage 151, a second oil passage 152, a feedback oil passage 106, a control unit 107, and a control valve 104.
  • the first oil passage 151 connects a discharge oil passage 105, which is communicated with parts to be supplied with the working oil, to the first outlet port 131, and delivers the working oil to the discharge oil passage 105 discharged from the first outlet port 131.
  • the second oil passage 152 connects the discharge oil passage 105 to the second outlet port 132, and delivers the working oil to the discharge oil passage 105 from the second outlet port 132.
  • the feedback oil passage 106 is connected to the second oil passage 152 and communicated with the inlet port 136.
  • the control unit 107 outputs a control signal on the basis of degree of oil pressure of the first oil passage 151, degree of oil temperature, degree of throttle angle, degree of rotational speed of an internal combustion engine serving as the drive source, or the like.
  • the control valve 104 is connected to the first oil passage 151, the second oil passage 152, and the feedback oil passage 106, and activated on the basis of the control signal of the control unit 107.
  • the disclosed oil pump includes the proportional electromagnetic control mechanism 108 such as a solenoid, or the like, for activating the control valve 104, the control unit 107 for generating the control signal relative to the proportional electromagnetic control mechanism 108, and a detecting mechanism such as a sensor, or the like, for outputting information such as degree of the oil pressure, degree of the oil temperature, degree of the throttle angle, or the like, relative to the control unit 107.
  • a structure for controlling the discharge pressure of the oil pump may be complicated and a manufacturing cost of the oil pump may occasionally be expensive.
  • the second control valve is provided independently from the first control valve to which the discharge pressure from the pump main body is applied, the second control valve, which is activated on the basis of degree of the temperature of the working oil, is not influenced by the pulsation of the discharge pressure of the working oil. Accordingly, the second control valve can be made of a low fatigue strength material.
  • Fig. 1 is a conceptual view illustrating a structure of an oil pump according to a first embodiment of the present invention.
  • Fig. 3 is a view illustrating a flow of the working oil of a state B without showing the main body of the oil pump according to the first embodiment of the present invention.
  • Fig. 6 is a view illustrating a flow of the working oil of a state E without showing the main body of the oil pump according to the first embodiment of the present invention.
  • Fig. 7 is a view illustrating a flow of the working oil of an intermediate state without showing the main body of the oil pump according to the first embodiment of the present invention.
  • Fig. 8 is a view illustrating a flow of the working oil of a high temperature state without showing the main body of the oil pump according to the first embodiment of the present invention.
  • Fig. 9A is a graph indicating a relation, within a normal temperature region of the working oil, between a rotational speed of a rotor and a discharge pressure of the working oil at a discharge oil passage of the oil pump according to the first embodiment of the present invention.
  • Fig. 9B is a graph indicating a relation, within a high temperature region of the working oil, between the rotational speed of the rotor and the discharge pressure of the working oil in the discharge oil passage of the oil pump according to the first embodiment of the present invention.
  • Fig. 10A is a graph indicating a relation, within the normal temperature region of the working oil, between the rotational speed of the rotor and the discharge pressure of the working oil in the discharge oil passage of an oil pump, which includes a first control valve similar to that of the first embodiment of the present invention, and does not include a second control valve.
  • Fig. 10B is a graph indicating a relation, within the high temperature region of the working oil, between the rotational speed of the rotor and the discharge pressure of the working oil in the discharge oil passage of the oil pump, which includes the first control valve similar to that of the first embodiment of the present invention, and does not include the second control valve.
  • Fig. 11 is a conceptual view illustrating a structure of an oil pump according to a second embodiment of the present invention.
  • Fig. 12B is a graph indicating a relation, within the high temperature region of the working oil, between the rotational speed of the rotor and the discharge pressure of the working oil in the discharge oil passage of the oil pump according to the second embodiment of the present invention.
  • Fig. 13A is a graph indicating a relation, within the normal temperature region of the working oil, between the rotational speed of the rotor and the discharge pressure of the working oil in the discharge oil passage of an oil pump, which includes the first control valve similar to that of the second embodiment of the present invention, and does not include the second control valve.
  • Fig. 14 is a conceptual view illustrating a structure of an oil pump according to a third embodiment of the present invention.
  • Fig. 15 is a conceptual view illustrating a structure of an oil pump of a known art.
  • an oil pump X is explained as an example, which is applied to a vehicle and supplies working oil to each part of an engine by generating an oil pressure by means of the engine serving as a drive source.
  • the oil pump X includes a pump main body 1 having a rotor 2 rotated by means of a crankshaft, first and second outlet ports 31 and 32 discharging the working oil out of the pump main body 1, an inlet port 36 sucking the working oil into the pump main body 1, a discharge oil passage 5 communicating with each part of the engine, or the like, to be supplied with the working oil, a first control valve 4 controlling a discharge pressure of the working oil from the pump main body 1, a second control valve 7 activated on the basis of degree of temperature of the working oil and controlling an operation of the first control valve 4, and a feedback oil passage 6 feeding back surplus working oil passed through the first control valve 4 to the inlet port 36 side.
  • a pump main body 1 having a rotor 2 rotated by means of a crankshaft, first and second outlet ports 31 and 32 discharging the working oil out of the pump main body 1, an inlet port 36 sucking the working oil into the pump main body 1, a discharge oil passage 5 communicating with each part of the engine, or the like, to be supplied
  • the pump main body 1 of the oil pump X is made of metal (e.g. aluminum-based alloy, an iron-based alloy, or the like) and formed with a pump chamber 10 inside thereof.
  • the pump chamber 10 is formed with an internal gear portion 12.
  • the internal gear portion 12 is provided with a plurality of internal gear teeth 11 so as to constitute a driven gear.
  • the metal rotor 2 is rotatably provided at the pump chamber 10.
  • the rotor 2 is connected to the crankshaft of the engine serving as the drive source, and is synchronously rotatable with the crankshaft.
  • the rotor 2 is designed to rotate at a revolving speed of from 600 to 7,000 rpm.
  • the rotor 2 is formed with an outer gear portion 22.
  • the outer gear portion 22 is provided with a plurality of outer gear teeth 21 so as to constitute a drive gear.
  • the internal gear teeth 11 and the outer gear teeth 21 are defined by a trochoid curve, a cycloid curve, or the like.
  • the rotor 2 rotates in a direction of arrow A1 shown in Fig. 1.
  • the outer gear teeth 21 of the rotor 2 are meshed with the internal gear teeth 11 one after another, and accordingly the internal gear portion 12 is rotated in the identical direction to the rotor 2.
  • spaces 22a - 22k there are formed spaces 22a - 22k.
  • a space 22f has the largest volume, and the spaces 22a and 22k have the smallest volume.
  • the spaces 22a - 22e produce an inlet pressure and they act to suck the working oil.
  • the spaces 22g - 22k is diminished, the spaces 22g - 22k produce the discharge pressure and they act to discharge the working oil.
  • the pump main body 1 is provided with, at a first side thereof, an outlet port array 33 having the first and second outlet ports 31 and 32 discharging the working oil out of the pump main body 1.
  • the outlet port array 33 discharges the working oil out of the pump chamber 10 in accordance with the rotation of the rotor 2.
  • the first outlet port 31 is provided with end side portions 31a and 31c
  • the second outlet port 32 is provided with end side portions 32a and 32c.
  • the first and second outlet ports 31 and 32 are communicated with the discharge oil passage 5.
  • the pump main body 1 is provided with, at a second side thereof, the inlet port 36.
  • the inlet port 36 sucks the working oil into the pump chamber 10 in accordance with the rotation of the rotor 2.
  • the inlet port 36 is provided with end side portions 36a and 36c.
  • the inlet port 36 is communicated with an inlet oil passage 8 communicating with an oil pan, or the like.
  • the first and second outlet ports 31 and 32 are separated by means of a separating member 37.
  • each of the first and second outlet ports 31 and 32 has an individual discharge function.
  • a width of the separating member 37 may be configured to be narrower than a teeth margin positioned between the first outlet port 31 and the second outlet port 32 in order to prevent an increase of the oil pressure, which is caused by a confinement of the working oil at the teeth margin during a compressing process of a space of the teeth margin between the internal gear teeth 11 and the outer gear teeth 21 by means of the rotation of the rotor 2.
  • the discharge oil passage 5 communicates with each part of the engine, or the like, to be supplied with the working oil, and supplies the working oil thereto. More particularly, the discharge oil passage 5 supplies the working oil to each part of the engine, which requires a lubrication by means of the working oil or an activation by means of the oil pressure, for example, a bearing such as a journal of the crankshaft of the engine, a valve timing control apparatus, a sliding portion between a cylinder and a piston, or the like. Alternatively, or in addition, the discharge oil passage 5 may be configured to supply the working oil to various parts of the vehicle other than the engine.
  • the discharge oil passage 5 includes a port connecting oil passage 51, which communicates the first outlet port 31 with the second outlet port 32 through the first control valve 4. Further the first outlet port 31 directly communicates with the discharge oil passage 5, and the second outlet port 32 communicates with the discharge oil passage 5 through the port connecting oil passage 51 and the first outlet port 31.
  • the first control valve 4 is provided in midstream of the port connecting oil passage 51.
  • the feedback oil passage 6 feeds back the surplus working oil passed through the first control valve 4 to the inlet port 36 side.
  • the feedback oil passage 6 may be communicated with the oil pan, or the like, to form a drain oil passage.
  • the first control valve 4 is provided in a first valve housing 41 for reciprocating therein.
  • the first control valve 4 includes a first valve body 42, a first valve chamber 43, a second valve chamber 44, and a biasing mechanism 45.
  • the first valve body 42 controls the discharge pressure of the working oil discharged from the pump main body 1 on the basis of its position in the first valve housing 41.
  • the first valve chamber 43 is formed below the first valve body 42 in the first valve housing 41 and is applied with the discharge pressure of the working oil from the pump main body 1.
  • the second valve chamber 44 is formed above the first valve body 42 in the first valve housing 41 and is capable of sucking the working oil.
  • the biasing mechanism 45 biases the first valve body 42 in a direction in which the first valve body 42 is moved toward the first valve chamber 43.
  • the first control valve 4 establishes or interrupts a communication path between the second outlet port 32 and the discharge oil passage 5 by activating the first valve body 42 to establish or interrupt a communication path of the port connecting oil passage 51. Then, the first control valve 4 performs a control for changing the discharge pressure of the operation oil to be discharged to the discharge oil passage 5 between the discharge pressure only from the first outlet port 31 and the discharge pressure from both of the first and second outlet ports 31 and 32. Accordingly, the first control valve 4 controls the discharge pressure of the working oil from the pump main body 1.
  • the first valve body 42 is slidably provided in the substantially cylindrical shaped first valve housing 41.
  • the first valve chamber 43 is located below the first valve body 42 as shown in Fig. 1
  • the second valve chamber 44 is located above the first valve body 42 as shown in Fig. 1.
  • the first valve chamber 43 communicates with the discharge oil passage 5 through a first transmission oil passage 52.
  • the discharge pressure of the working oil applies to a first surface of the first valve body 42 (i.e., a lower surface of the first valve body 42 in Fig. 1).
  • the second valve chamber 44 is provided with a spring 45a of the biasing mechanism 45.
  • the first valve body 42 is biased in a direction in which the first valve body 42 is moved toward the first valve chamber 43 (a direction of B1 in Fig. 1) by means of the spring 45a.
  • a position of the first valve body 42 is defined by means of a balance between a biasing force of the spring 45a in the direction in which the first valve body 42 is moved toward the first valve chamber 43 (the direction of B1 in Fig. 1) and a force of the discharge pressure of the working oil in the first valve chamber 43 in a direction in which the first valve body 42 is moved toward the second valve chamber 44.
  • the second valve chamber 44 communicates with the second control valve 7 through a first intermediate oil passage 91 and a second intermediate oil passage 92. Therefore, the working oil can be flowed into the second control chamber 44 through the second control valve 7.
  • the second control valve 7 controls the first control valve 4 on the basis of degree of the temperature of the working oil. More particularly, the second control valve 7 controls the oil pressure of the working oil flowed into the second valve chamber 44 of the first control valve 4 on the basis of degree of the temperature of the working oil. According to the embodiment of the present invention, in a condition where the temperature of the working oil satisfies a predetermined temperature condition J, the second control valve 7 performs a control for establishing a communication path between the second valve chamber 44 and the first valve chamber 43 by establishing a communication path between the second valve chamber 44 of the first control valve 4 and the discharge oil passage 5.
  • the second control valve 7 performs a control for moving the first valve body 42 of the first control valve 4 to a last end portion of the first valve housing 41 at the first valve chamber 43 side on the basis of a view that the oil pressure in the second valve chamber 44 is substantially equal to that of the first valve chamber 43.
  • the second control valve 7 performs a control for establishing a communication path between the second valve chamber 44 of the first control valve 4 and the feedback oil passage 6. On this condition, the oil pressure in the second valve chamber 44 is adequately lower degree than that of the first valve chamber 43.
  • the position of the first valve body 42 is defined by means of the balance between the biasing force of the spring 45a of the biasing mechanism 45 and the force of the oil pressure in the first valve chamber 43. Accordingly, the first control valve 4 controls the discharge pressure of the working oil to be discharged to the discharge oil passage 5 by means of a movement of the first valve body 42 on the basis of degree of the discharge pressure of the working oil.
  • the oil pump X supplies the working oil relative to each part of the engine of the vehicle.
  • a temperature of the working oil under normal use conditions is assumed to be from room temperature to 110 degrees C.
  • a temperature of the working oil in a condition where the engine is activated for long periods of time with a heavy load is assumed to be higher degree, for example, approximately from 110 to 130 degrees C.
  • the temperature condition J is assumed to be approximately from 110 to 130 degrees C.
  • the second control valve 7 includes a second valve body 72 and a valve body operating mechanism 73.
  • the second valve body 72 reciprocates in a second valve housing 71 and changes a control whether to establish or interrupt the communication path between the second valve chamber 44 and the first valve chamber 43.
  • the valve body operating mechanism 73 activates the second valve body 72 by means of a heat-sensitive expanding and contracting member 73a, which is expanded and contracted in a direction of a reciprocation of the second valve body 72 on the basis of degree of the temperature of the working oil.
  • the second valve body 72 is slidably provided in the substantially cylindrical shaped second valve housing 71.
  • the second valve body 72 is provided with a third oil passage 72a for controlling a communication path of the second valve chamber 44 of the first control valve 4
  • the working oil from the feedback oil passage 6 flows into a space in the second valve housing 71 in which the heat-sensitive expanding and contracting member 73a is provided through the low pressure port 71b. Therefore, the heat-sensitive expanding and contracting member 73a is normally soaked in the working oil and the temperature of the working oil can be transmitted thereto.
  • the heat-sensitive expanding and contracting member 73a expands in the direction of the reciprocation of the second valve body 72 and compresses the elastic member 73b to move the second valve body 72 in a second side (the lower side as viewed in Fig. 1).
  • the temperature condition J is assumed to be approximately from 110 to 130 degrees C. Therefore, in a condition where the temperature of the working oil in the vicinity of the heat-sensitive expanding and contracting member 73a becomes equal to, or higher than, 110 degrees C., the heat-sensitive expanding and contracting member 73a expands in the direction of the reciprocation of the second valve body 72 and moves the second valve body 72 in a vertical direction.
  • the second control valve 7 is configured to activate independently from the first control valve 4.
  • the discharge pressure of the working oil is pulsated.
  • the heat-sensitive expanding and contracting member 73a is not influenced by a pulsation of the discharge pressure of the working oil because the second valve body 72 of the second control valve 7 is applied with the discharge pressure of the working oil from a side face thereof through the high pressure port 71a. Accordingly, even when the heat-sensitive expanding and contracting member 73a includes a spring made of shape memory alloy, fatigue strength of which is at a lower degree, a fatigue breakdown of the spring is not generated.
  • FIG. 2-8 An operation of the first control valve 4 and the second control valve 7 in response to an increase of a rotational speed of the rotor 2 of the pump main body 1 and an increase of the temperature of the working oil will be explained hereinafter. Illustrated in Figs. 2-8 are a flow of the working oil in various conditions of the first control valve 4 and the second control valve 7.
  • Figs. 9A-9B are a relation, within a normal temperature region of the working oil (approximately from room temperature to 110 degrees C.) and within a high temperature region of the working oil (approximately from 110 to 130 degrees C.), between the rotational speed of the rotor 2 and the discharge pressure of the working oil in the discharge oil passage 5.
  • Fig. 9A indicates a condition where the temperature of the oil is approximately 80 degrees C.
  • Fig. 9B indicates a condition where the temperature of the oil is approximately 130 degrees C.
  • FIG. 9A-9B indicates a relation between the discharge pressure of the working oil, discharged from both of the first outlet port 31 and the second outlet port 32, and the rotational speed of the rotor 2. Further, a straight line L2 in Figs. 9A-9B indicates a relation between the discharge pressure of the working oil, discharged only from the first outlet port 31 and the rotational speed of the rotor 2. In Figs. 9A-9B, hatching areas W1 - W4 indicate the oil pressure required at each part to be supplied with the working oil.
  • the second control valve 7 comes into a normal state in which the second control chamber 44 of the first control valve 4 is communicated with the feedback oil passage 6 as illustrated in Figs. 2-6.
  • the second valve body 72 of the second control valve 7 is located at a position in which the first communicating port 71d communicating with the first intermediate oil passage 91 is communicated with the communicating passage 71f communicating with the low pressure port 71b through the third oil passage 72a.
  • the second valve chamber 44 of the first control valve 4 communicates with the feedback oil passage 6. Further, in a condition where the temperature of the working oil is in the normal temperature region (equal to, or lower than, approximately 110 degrees C), in other words, in a condition where the second control valve 7 is held at the normal state, the first control valve 4 activates the first valve body 42 to achieve states of A-E and controls the discharge pressure of the working oil to be discharged to the discharge oil passage 5. Illustrated in Fig. 9A is a relation between the rotational speed of the rotor 2 and the discharge pressure of the working oil from the discharge oil passage 5 under the above described circumstances.
  • the first valve body 42 of the first control valve 4 positions at the last end portion of the first valve housing 41 at the first valve chamber 43 side, and the first control valve 4 performs a control for supplying the working oil discharged from both of the first outlet port 31 and the second outlet ports 32 to the discharge oil passage 5.
  • the first valve body 42 closes the first and second feedback ports 41c and 41d and communicates the first oil passage 42a with the port connecting oil passage 51 at both of the second outlet port 32 side and the first outlet port 31 side.
  • the working oil discharged from the second outlet port 32 is supplied to the discharge oil passage 5 through the first control valve 4 and the first outlet port 31.
  • the first control valve 4 communicates both of the first and second outlet ports 31 and 32 with the discharge oil passage 5, and performs a control for supplying the working oil discharged from both of the first and second outlet ports 31 and 32 to the discharge oil passage 5.
  • an amount of the working oil to be supplied to the discharge oil passage 5 becomes a sum of a discharge amount of the first outlet port 31 and that of the second outlet port 32.
  • the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5 can obtain a characteristic indicated by line O-P illustrated in Fig. 9A. More particularly, the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5 can obtain a characteristic that the discharge pressure increases in response to the increase of the rotational speed of the rotor 2.
  • the biasing force of the spring 45a of the biasing mechanism 45 and conditions such as a position, a shape, or the like, of the first oil passage 42a and the second oil passage 42b are appropriately designated to achieve the states of A-E by activating the first valve body 42 on the basis of degree of the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5.
  • the first valve body 42 moves to the second valve chamber 44 side (an upper side as viewed in Fig. 3) to some degree from a position illustrated in Fig. 3 and communicates the first oil passage 42a with the port connecting oil passage 51 at the second outlet port 32 side, and the feedback oil passage 6 through the first feedback port 41c while closing the second feedback port 41d.
  • the second oil passage 42b communicates only with the port connecting oil passage 51 at the first outlet port 31 side.
  • the first control valve 4 communicates both of the first and second outlet ports 31 and 32 with the discharge oil passage 5 and the feedback oil passage 6, and accordingly performs a control for supplying some of the working oil discharged from both of the first and second outlet ports 31 and 32 to the discharge oil passage 5 and performs a control for supplying some of the working oil to the feedback oil passage 6.
  • the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5 can obtain a characteristic indicated by line S-T illustrated in Fig. 9A. More particularly, on this occasion, the increase of the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5 in response to the increase of the rotational speed of the rotor 2 is lowered because the communication path to the feedback oil passage 6 is established.
  • the operation of the first control valve 4 and the second control valve 7 in a condition where the temperature of the working oil exceeds approximately 110 degrees C. will be explained hereinafter.
  • the second control valve 7 comes into the high temperature state in which the second chamber 44 is communicated with the discharge oil passage 5 as illustrated in Fig. 8 after passing through a medium state in which the second valve chamber 44 is communicated with both of the discharge oil passage 5 and the feedback oil passage 6 as illustrated in Fig. 7.
  • the first control valve 4 establishes a communication path between the second valve chamber 44 and the first valve chamber 43 to conform the oil pressure thereof and moves the first valve body 42 to the last end portion of the first valve housing 41 at the first valve chamber 43 side by means of the biasing mechanism 45.
  • the first control valve 4 is held at the state A regardless of conditions of the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5, and performs a control for supplying the working oil discharged from both of the first and second outlet ports 31 and 32 to the discharge oil passage 5.
  • the second chamber 44 of the first control valve 4 communicates with both of the discharge oil passage 5 and the feedback oil passage 6, and the working oil is began to flow into the second valve chamber 44.
  • the second control valve 7 temporarily comes into the medium state on the way of shifting to the high temperature state.
  • the second control valve 7 comes into the high temperature state by further expanding of the heat-sensitive expanding and contracting member 73a.
  • the second chamber 44 of the first control valve 4 communicates with the discharge oil passage 5 through the second transmission oil passage 53. Therefore, the second valve chamber 44 of the first control valve 4 communicates with the first valve chamber 43 through the discharge oil passage 5, and the oil pressure in the second valve chamber 44 and that of the first valve chamber 43 becomes approximately equal.
  • the first control valve 4 performs a control for moving the first valve body 42 to the last end portion of the first valve housing 41 at the first valve chamber 43 side by means of the biasing mechanism 45.
  • the first control valve 4 is held at the state A regardless of the conditions of the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5, and performs a control for supplying the working oil discharged from both of the first and second outlet ports 31 and 32 to the discharge oil passage 5.
  • the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5 can obtain a characteristic indicated by line O-S illustrated in Fig. 9B. More particularly, on this occasion, the discharge pressure is increased in response to the increase of the rotational speed of the rotor 2.
  • some of the working oil in the discharge oil passage 5 is supplied to the feedback oil passage 6 for relieving the discharge pressure by means of a relief valve (not shown) provided at the discharge oil passage 5 in a condition where the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5 corresponds to the fifth region V designated at the higher pressure side than the fourth region IV.
  • the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5 can obtain a characteristic indicated by line S-T illustrated in Fig. 9B. More particularly, on this occasion, the increase of the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5 in response to the increase of the rotational speed of the rotor 2 is lowered.
  • the second control valve 7 is activated at a high temperature condition of the oil and the first control valve 4 performs a control for the working oil discharged from both of the first and second outlet ports a 31 and 32 to the discharge oil passage 5 regardless of the conditions of the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5.
  • the oil pump X according to the embodiment of the present invention can ensure the required discharge pressure at the high temperature condition of the oil and can also achieve an optimal discharge pressure within the normal temperature region, which is a temperature region of the working oil under the normal use conditions, in other words, less than, or equal to, approximately 110 degrees C. Accordingly, the operation resistance of the oil pump X can be reduced. Therefore, in a condition where the oil pump X is activated by means of the engine of the vehicle, a fuel economy of the engine can be improved.
  • Illustrated in Figs. 10A-10B are a relation, within the normal temperature region of the working oil (approximately from room temperature to 110 degrees C.) and within the high temperature region of the working oil (approximately from 110 to 130 degrees C.), between the rotational speed of the rotor 2 and the discharge pressure of the working oil of an oil pump, which has a first control valve similar to that of the first embodiment of the present invention and does not have a second control valve.
  • Illustrated in Fig. 10A is a condition where the temperature of the oil is approximately 80 degrees C.
  • illustrated in Fig. 10B is a condition where the temperature of the oil is approximately 130 degrees C.
  • the oil pump illustrated in Fig. 10 reduces the load applied to the engine by lowering the operation resistance of the oil pump by controlling the oil pressure at the lower degree in a region in which the rotational speed of the rotor is at the medium degree (the medium revolving-speed region of the engine), that is, in regions indicated by line P-Q, Q-R, and R-S in Figs. 10A-10B.
  • the oil pump which does not have the second control valve 7 is configured to have a control valve, which is a valve corresponding to the first control valve according to the first embodiment of the present invention, for controlling the discharge amount or the discharge pressure of the working oil relative to the rotational speed of the rotor in order to ensure the discharge pressure more than, or equal to, the predetermined required pressure (areas W1-W4) for the parts to be supplied with the working oil even at an assumed highest temperature of the working oil as illustrated in Fig. 10B.
  • 10B is configured to supply the working oil, discharge pressure of which is more than, or equal to, each predetermined required oil pressure such as the required oil pressure for the valve timing control apparatus (area W1), the required oil pressure for the crank journal (area W2), the required oil pressure for the piston jet (area W3), and the required oil pressure for the idling of the engine (area W4), to the discharge oil passage 5 in the whole region of the rotational speed of the rotor in a condition where the working oil is at approximately 130 degrees C.
  • each predetermined required oil pressure such as the required oil pressure for the valve timing control apparatus (area W1), the required oil pressure for the crank journal (area W2), the required oil pressure for the piston jet (area W3), and the required oil pressure for the idling of the engine (area W4)
  • the region in which the discharge pressure is reduced by means of the first control valve 4 is located at a lower rotational speed side as illustrated in Fig. 10A relative to a condition where the temperature of the working oil is at the higher degree as illustrated in Fig. 10B. More particularly, the discharge oil pressure is increased in a condition where the rotational speed of the rotor is relatively lower degree than the rotational speed of the rotor that requires the required oil pressure for the piston jet (area W3). Thus, a region Y, in which a surplus discharge pressure is generated, is occurred and an effect of decreasing of the load applied to the engine is lowered.
  • the working oil of the vehicle in practice comes into the high temperature region (approximately from 110 to 130 degrees C.) on rare condition such as a condition where the engine is activated for long periods of time with a heavy load, and the working oil of the vehicle in practice is within the normal temperature region (approximately from room temperature to 110 degrees C.) under the normal use conditions. Accordingly, with a discharge control of the working oil as illustrated in Fig. 10, the effect of decreasing of the load applied to the engine may occasionally be low.
  • the second control valve 7 is activated at the high temperature condition of the oil and the first control valve 4 performs a control for supplying the working oil discharged from both of the first and second outlet ports 31 and 32 to the discharge oil passage 5 regardless of the conditions of the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5.
  • the oil pump X according to the first embodiment of the present invention can ensure the required discharge pressure at the high temperature condition of the oil and can also achieve the optimal discharge pressure within the normal temperature region, which is the temperature region of the working oil under the normal use conditions, in other words, less than, or equal to, approximately 110 degrees C. Therefore, as illustrated in Fig.
  • the pump main body 1, the first control valve 4, or the like, of the oil pump X can be configured to widely ensure the region in which the discharge pressure of the working oil can be reduced within the normal temperature region. Accordingly, a rotational speed region of the rotor 2, in which the operation resistance of the oil pump X can be reduced within the normal temperature region, can be expanded and the effect of decreasing of the load applied to the engine can be improved.
  • the pump main body 1 and the first and second outlet ports 31 and 32 may be configured that the discharge pressure of the working oil from the first outlet port 31 (the discharge pressure indicated by line Q-R in Fig.
  • the discharge pressure which is more than, or equal to, the required oil pressure at the parts to be supplied with the working oil
  • the temperature of the working oil is at the lower limit of the temperature condition J (approximately 110 degrees C.), at which the discharge pressure of the working oil becomes at the lowest level when the temperature of the working oil does not satisfy the temperature condition J, and where the temperature of the working oil is at the higher limit of the temperature condition J (approximately 130 degrees C.), at which the discharge pressure becomes at the lowest level when the working oil satisfies the temperature condition J.
  • the discharge pressure which is more than, or equal to, the required oil pressure at the parts to be supplied with the working oil, can be ensured under any temperature conditions.
  • a second embodiment of the present invention will be explained hereinafter with reference to Fig. 11.
  • the configuration of an oil pump XII according to the second embodiment of the present invention is basically similar to that of the oil pump X according to the first embodiment of the present invention in a structure.
  • the same structure as described in the aforementioned embodiment is not repeatedly explained.
  • a structure of a first valve body 242 of a first control valve 204 is different from that of the first embodiment of the present invention.
  • the first valve body 242 of the oil pump XII according to the second embodiment of the present invention does not include an oil passage corresponding to the second oil passage 42b of the first embodiment of the present invention, and only includes an oil passage corresponding to the first oil passage 42a of the first embodiment of the present invention.
  • the first control valve 204 of the oil pump XII operates the first valve body 242 for achieving a similar condition to the conditions A-C (Figs. 2-4) of the first control valve 4 according to the first embodiment of the present invention on the basis of degree of the discharge pressure of the working oil to be discharged to the discharge oil passage 5 in a condition where the temperature of the working oil is within the normal temperature region (equal to, or lower than, approximately 110 degrees C.), that is, in a condition where a second control valve 207 is held at a normal state.
  • the oil pump XII in a condition where the discharge pressure of the working oil is increased, the oil pump XII according to the second embodiment of the present invention establishes a communication path between a first valve chamber 243 and a second feedback port 241d, and supplies some of the working oil in a discharge oil passage 205 to a feedback oil passage 206 for relieving the discharge pressure. Then, the second control valve 207 performs an operation similar to that of the oil pump X according to the first embodiment of the present invention.
  • Figs. 12A-12B Illustrated in Figs. 12A-12B are a relation, within the normal temperature region of the working oil (approximately from room temperature to 110 degrees C.) and within the high temperature region of the working oil (approximately from 110 to 130 degrees C.), between a rotational speed of a rotor 202 and the discharge pressure of the working oil in the discharge oil passage 205.
  • Fig. 12A indicates a condition where the temperature of the oil is approximately 80 degrees C.
  • Fig. 12B indicates a condition where the temperature of the oil is approximately 130 degrees C.
  • Fig. 12 according to the second embodiment of the present invention corresponds to Fig. 9 according to the first embodiment of the present invention.
  • the oil pump XII in a condition where the temperature of the working oil is within the normal temperature region (equal to, or lower than approximately 110 degrees C.), by activating the first control valve 204 on the basis of degree of the discharge pressure of the working oil to be discharged to the discharge oil passage 205, the oil pressure is rapidly increased (line O-P in Fig. 12A) in a condition where the rotational speed of the rotor 202 is at a lower degree (the low revolving-speed region of the engine) for ensuring the required oil pressure for the valve timing control apparatus (area W1 in Fig. 12A), and controls the oil pressure at the lower degree (line P-Q and line Q-R in Fig.
  • the oil pump performing a control illustrated in Fig. 12A may be used as an oil pump for supplying the working oil to an engine, which does not perform the piston jet at the high revolving-speed region, that is, an engine, which does not have the required pressure for the piston jet (area W3) according to the first embodiment of the present invention.
  • the second control valve 207 is activated at the high temperature condition of the oil and the first control valve 204 performs a control for supplying the working oil discharged from both of the first and second outlet ports 31 and 32 to the discharge oil passage 5 regardless of the conditions of the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 5.
  • the oil pump XII according to the second embodiment of the present invention can ensure the required discharge pressure at the high temperature condition of the oil and can also achieve an optimal discharge pressure within the normal temperature region, which is the temperature region of the working oil under the normal use conditions, in other words, less than, or equal to, approximately 110 degrees C. Accordingly, the operation resistance of the oil pump XII can be reduced. Therefore, in a condition where the oil pump X is activated by means of the engine of the vehicle, a fuel economy of the engine can be improved.
  • Illustrated in Figs. 13A-13B are a relation, within the normal temperature region of the working oil (approximately from room temperature to 110 degrees C.) and within the high temperature region of the working oil (approximately from 110 to 130 degrees C.), between the rotational speed of the rotor and the discharge pressure of the working oil of an oil pump, which has a first control valve similar to that of the second embodiment of the present invention and does not have a second control valve.
  • Illustrated in Fig. 13A is a condition where the temperature of the oil is approximately 80 degrees C.
  • illustrated in Fig. 13B is a condition where the temperature of the oil is approximately 130 degrees C.
  • Fig. 13 corresponds to Fig. 10 according to the first embodiment of the present invention.
  • the oil pump illustrated in Fig. 13 is provided with a control valve (a valve corresponding to the first valve according to the second embodiments of the present invention) for controlling the discharge amount and the discharge pressure of the working oil in order to ensure the discharge pressure more than, or equal to, the predetermined required pressure (areas W1, W2, and W4) at the parts to be supplied with the working oil even at the assumed highest temperature of the working oil as illustrated in Fig. 13B.
  • a control valve a valve corresponding to the first valve according to the second embodiments of the present invention for controlling the discharge amount and the discharge pressure of the working oil in order to ensure the discharge pressure more than, or equal to, the predetermined required pressure (areas W1, W2, and W4) at the parts to be supplied with the working oil even at the assumed highest temperature of the working oil as illustrated in Fig. 13B.
  • the effect of decreasing of the operation resistance of the oil pump may occasionally be lowered because the region, in which the discharge pressure of the working oil can be reduced by means of the first control valve in a condition where the rotational speed of the rotor is higher than the medium degree, is narrowed as illustrated in Fig. 13A. More particularly, in a condition where the temperature of the working oil is at the lower degree, the rate of the increase of the discharge pressure of the working oil relative to the increase of the rotational speed of the rotor becomes higher degree.
  • the region in which the discharge pressure is reduced by means of the first control valve is located at a lower rotational speed side as illustrated in Fig. 13A relative to a condition where the temperature of the working oil is at the higher degree as illustrated in Fig. 13B. Accordingly, the higher degree of the discharge pressure of the working oil is generally outputted from the lower revolving-speed region of the rotor, and the region Y, in which the surplus discharge pressure is generated, is occurred. In consequence, the effect of decreasing of the load applied to the engine may occasionally be lowered.
  • the second control valve 207 is activated at the high temperature condition of the oil and the first control valve 204 performs a control for supplying the working oil discharged from both of the first and second outlet ports 231 and 232 to the discharge oil passage 205 regardless of the conditions of the oil pressure of the working oil (the discharge pressure) in the discharge oil passage 205.
  • the oil pump XII according to the second embodiment of the present invention can ensure the required discharge pressure at the high temperature condition of the oil and can also achieve the optimal discharge pressure within the normal temperature region, which is the temperature region of the working oil under the normal use conditions, in other words, less than, or equal to, approximately 110 degrees C. Therefore, as illustrated in Fig.
  • the pump main body 201, the first control valve 204, or the like, of the oil pump XII can be configured to widely ensure the region in which the discharge pressure of the working oil can be reduced within the normal temperature region. Accordingly, a rotational speed region of the rotor 202, in which the operation resistance of the oil pump XII can be reduced within the normal temperature region, can be expanded and the effect of decreasing of the load applied to the engine can be improved.
  • the pump main body 201 and the first and second outlet ports 231 and 232 may be configured that the discharge pressure of the working oil from the first outlet port 231 (the discharge pressure indicated by line Q-R in Fig.
  • the discharge pressure which is more than, or equal to, the required oil pressure at the parts to be supplied with the working oil
  • the temperature of the working oil is at the lower limit of the temperature condition J (approximately 110 degrees C.), at which the discharge pressure of the working oil becomes at the lowest level when the temperature of the working oil does not satisfy the temperature condition J, and where the temperature of the working oil is at the higher limit of the temperature condition J (approximately 130 degrees C.), at which the discharge pressure becomes at the lowest level when the working oil satisfies the temperature condition J.
  • the discharge pressure which is more than, or equal to, the required oil pressure at the parts to be supplied with the working oil, can be ensured under any temperature conditions.
  • a third embodiment of the present invention will be explained hereinafter with reference to Fig. 14.
  • the same structure as described in the aforementioned embodiments is not repeatedly explained.
  • a first control valve 304 according to the third embodiment of the present invention functions only as the relief valve for a condition where the discharge pressure of the working oil in a discharge oil passage 305 is at the higher degree.
  • the first control valve 304 of the oil pump XIII according to the third embodiment of the present invention is activated on the basis of degree of the discharge pressure of the working oil to be discharged to the discharge oil passage 305 in a condition where the temperature of the working oil is within the normal temperature region (equal to, or lower than, approximately 110 degrees C.), that is, in a condition where the second control valve 307 is held at the normal state. Further, in a condition where the discharge pressure of the working oil is increased, the oil pump XIII according to the third embodiment of the present invention establishes a communication path between a first valve chamber 343 and a second feedback port 341d, and supplies some of the working oil in the discharge oil passage 305 to a feedback oil passage 306 for relieving the discharge pressure.
  • the oil pump XIII according to the third embodiment of the present invention can perform a control not to operate the first control valve 304 serving as the relief valve in a condition where the temperature of the working oil is at the higher degree. Accordingly, the oil pump XIII according to the third embodiment of the present invention can ensure the required discharge pressure at the high temperature condition of the oil and can also achieve the optimal discharge pressure within the normal temperature region, which is the temperature region of the working oil under the normal use conditions, in other words, less than, or equal to, approximately 110 degrees C.
  • the heat-sensitive expanding and contracting member 73a, 273a, 373a of the second control valve 7, 207, 307 includes a spring made of shape memory alloy.
  • a thermostat wax, a bimetal, or the like can be used for the heat-sensitive expanding and contracting member 73a, 273a, 373a.
  • combination of the shape memory alloy, thermostat wax, and the bimetal may be used for the heat-sensitive expanding and contracting member 73a, 273a, 373a.
  • the second control valve 7, 207, 307 establishes the communication path between the second valve chamber 44, 244, 344 and the first valve chamber 43, 243, 343 in a condition where the temperature of the working oil satisfies the predetermined temperature condition J.
  • the invention is not limited thereto.
  • the second control valve 7, 207, 307 may be configured to adjust an amount of the working oil to be flowed into the second valve chamber 44, 244, 344 of the first control valve 4, 204, 304.
  • the second control valve 7, 207, 307 may control the oil pressure of the working oil to be flowed into the second valve chamber 44, 244, 344 by adjusting the amount of the working oil to be flowed into the second valve chamber 44, 244, 344.
  • the oil pump can be configured without the biasing mechanism 45, 245, 345, or the like, for biasing the first valve body 42, 242, 342 of the first control valve 4, 204, 304 toward the first valve chamber 43, 243, 343 side.
  • the oil pump without the biasing mechanism 45, 245, 345 controls the position of the first valve body 42, 242, 342 in the housing 41, 241, 341 by means of the balance between the oil pressure of the working oil flowed into the second valve chamber 44, 244, 344 and the discharge pressure of the working oil applied to the first valve chamber 43, 243, 343.
  • the oil pump applied to the vehicle engine is explained.
  • the invention is not limited thereto.
  • the present invention can be applied to any oil pump other than the oil pump of the vehicle or the engine.
  • the second control valve can adjust the position of the valve body on the basis of degree of the temperature of the working oil by controlling the oil pressure of the working oil to be flowed into the second valve chamber facing the first valve chamber to which the discharge pressure of the working oil is applied.
  • the second valve chamber is provided to face the first valve chamber across the valve body.
  • the oil pump according to the embodiments of the present invention can activate the first control valve, which controls the discharge pressure of the working oil, without providing a proportional electromagnetic control mechanism such as a solenoid, or the like.
  • the second control valve is provided independently from the first control valve to which the discharge pressure from the pump main body is applied, the second control valve, which is activated on the basis of degree of the temperature of the working oil, is not influenced by the pulsation of the discharge pressure of the working oil. Accordingly, the second control valve can be made of a low fatigue strength material.
  • the present invention is applicable as long as the first control valve includes the biasing mechanism biasing the first valve body in the direction in which the first valve body is moved toward the first valve chamber, and the second control valve establishing the communication path between the second valve chamber and the first valve chamber in a condition where the temperature of the working oil satisfies the predetermined temperature condition.
  • the oil pump in a condition where the temperature of the working oil satisfies the predetermined temperature condition, the communication path between the second valve chamber and the first valve chamber is established and the oil pressure in the second valve chamber and that of the first valve chamber becomes approximately equal. Then, the first valve body of the first control valve moves to the last end portion of the first valve housing at the first valve chamber side by means of the biasing mechanism. Accordingly, because the first control valve is configured to control the optimal discharge pressure corresponding to the temperature of the working oil in a condition where the first valve body is positioned at the last end portion of the first valve housing at the first valve chamber side, the oil pump can appropriately control the discharge pressure on the basis of degree of the temperature of the working oil with a simple structure.
  • the present invention is applicable as long as the second control valve includes the second valve body reciprocating in the second valve housing and switching the control whether to establish or interrupt the communication path between the second valve chamber and the first valve chamber of the first control valve, and the valve body operating mechanism activating the second valve body by means of the heat-sensitive expanding and contracting member, which is expanded and contracted in the direction of the reciprocation of the second valve body on the basis of degree of the temperature of the working oil.
  • the temperature of the working oil is transmitted, and the second valve body is activated by means of the heat-sensitive expanding and contracting member, which is expanded and contracted in the direction of the reciprocation of the second valve body on the basis of degree of the temperature of the working oil. Therefore, the oil pump can appropriately control the discharge pressure corresponding to the temperature of the working oil with the simple structure. Further, because the second control valve is provided independently from the first control valve to which the discharge pressure from the pump main body is applied, the heat-sensitive expanding and contracting member of the second control valve is not influenced by the pulsation of the discharge pressure of the working oil. Accordingly, the second control valve can be made of the low fatigue strength material.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Fluid Gearings (AREA)
EP06001755A 2005-02-01 2006-01-27 Öl- Zahnradpumpe Withdrawn EP1686265A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005025198A JP2006214286A (ja) 2005-02-01 2005-02-01 オイルポンプ

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EP1686265A3 EP1686265A3 (de) 2008-06-18

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Cited By (5)

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WO2009095011A3 (de) * 2008-01-31 2009-12-10 Dieter Voigt Druckumschaltung für ölpumpen
EP1921317A3 (de) * 2006-11-07 2010-04-28 Aisin Seiki Kabushiki Kaisha Ölzufuhrvorrichtung für einen Motor
EP2213879A1 (de) * 2009-01-22 2010-08-04 Danfoss Scroll Technologies Spiralverdichter mit dreistufiger Leistungssteuerung
EP2628954A4 (de) * 2010-12-06 2013-10-02 Aisin Seiki Ölversorgungsvorrichtung
WO2021028427A1 (de) * 2019-08-15 2021-02-18 Voith Patent Gmbh Überhitzungsschutz für hydraulische systeme

Families Citing this family (17)

* Cited by examiner, † Cited by third party
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US9752581B2 (en) * 2011-11-07 2017-09-05 Aisin Seiki Kabushiki Kaisha Oil supply apparatus
DE102012104456B3 (de) * 2012-05-23 2013-05-29 Pierburg Gmbh Ventilvorrichtung für einen Hydraulikkreislauf sowie Ölpumpenregelanordnung
KR101326850B1 (ko) * 2012-10-04 2013-11-11 기아자동차주식회사 오일펌프 제어 시스템 및 방법
JP6056595B2 (ja) * 2013-03-27 2017-01-11 トヨタ自動車株式会社 可変容量型オイルポンプの制御装置
KR101575423B1 (ko) 2013-12-17 2015-12-07 현대자동차주식회사 차량용 오일펌프
JP6294653B2 (ja) 2013-12-18 2018-03-14 株式会社山田製作所 オイルポンプのリリーフ装置
JP2016027254A (ja) 2014-06-30 2016-02-18 株式会社山田製作所 エンジンのオイル回路のリリーフ装置
JP6706028B2 (ja) 2014-06-30 2020-06-03 株式会社山田製作所 エンジンのオイル回路のリリーフ装置
JP2016027253A (ja) 2014-06-30 2016-02-18 株式会社山田製作所 エンジンのオイル回路のリリーフ装置
WO2016055082A1 (en) * 2014-10-09 2016-04-14 Volvo Truck Corporation An oil pump assembly for a vehicle lubrication system
JP6487749B2 (ja) * 2015-03-30 2019-03-20 株式会社Ｓｕｂａｒｕ オイルポンプ
JP6454208B2 (ja) * 2015-03-30 2019-01-16 株式会社Ｓｕｂａｒｕ オイルポンプ
JP6491514B2 (ja) * 2015-03-30 2019-03-27 株式会社Ｓｕｂａｒｕ オイルポンプ
JP6599181B2 (ja) * 2015-09-07 2019-10-30 アイシン機工株式会社 ギヤポンプ
KR101680648B1 (ko) * 2015-09-10 2016-11-30 명화공업주식회사 듀얼 펌프 시스템
JPWO2018173823A1 (ja) * 2017-03-23 2020-01-23 日本電産トーソク株式会社 オイルポンプ装置
CN114837792A (zh) 2021-03-10 2022-08-02 美普盛（上海）汽车零部件有限公司 一种带膨胀补偿密封件的电动冷却液泵

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2636318B2 (ja) * 1988-04-06 1997-07-30 トヨタ自動車株式会社 液圧駆動式冷却ファンの制御装置
US5277028A (en) * 1990-03-26 1994-01-11 Mercedes-Benz Ag Hydraulic flow control with temperature sensitive spring biased bypass valve
JP3531769B2 (ja) * 1994-08-25 2004-05-31 アイシン精機株式会社 オイルポンプ装置
DE10051780A1 (de) * 2000-10-19 2002-04-25 Daimler Chrysler Ag Druckregeleinheit für einen Ölkreislauf eines Kraftfahrzeugverbrennungsmotors
DE10141786B4 (de) * 2001-08-25 2008-12-24 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Einrichtung zur Regelung des Schmieröldruckes einer Brennkraftmaschine

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EP1921317A3 (de) * 2006-11-07 2010-04-28 Aisin Seiki Kabushiki Kaisha Ölzufuhrvorrichtung für einen Motor
US7810467B2 (en) 2006-11-07 2010-10-12 Aisin Seiki Kabushiki Kaisha Oil supplying apparatus for engine
EP2275682A1 (de) * 2006-11-07 2011-01-19 Aisin Seiki Kabushiki Kaisha Ölzufuhrvorrichtung für einen Motor
CN101178064B (zh) * 2006-11-07 2012-07-04 爱信精机株式会社 发动机供油装置
WO2009095011A3 (de) * 2008-01-31 2009-12-10 Dieter Voigt Druckumschaltung für ölpumpen
EP2213879A1 (de) * 2009-01-22 2010-08-04 Danfoss Scroll Technologies Spiralverdichter mit dreistufiger Leistungssteuerung
US8328531B2 (en) 2009-01-22 2012-12-11 Danfoss Scroll Technologies, Llc Scroll compressor with three-step capacity control
EP2628954A4 (de) * 2010-12-06 2013-10-02 Aisin Seiki Ölversorgungsvorrichtung
US8827659B2 (en) 2010-12-06 2014-09-09 Aisin Seiki Kabushiki Kaisha Oil supply apparatus
WO2021028427A1 (de) * 2019-08-15 2021-02-18 Voith Patent Gmbh Überhitzungsschutz für hydraulische systeme

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EP1686265A3 (de) 2008-06-18
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