US3058455A - Injection pump - Google Patents

Injection pump Download PDF

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Publication number
US3058455A
US3058455A US91007A US9100761A US3058455A US 3058455 A US3058455 A US 3058455A US 91007 A US91007 A US 91007A US 9100761 A US9100761 A US 9100761A US 3058455 A US3058455 A US 3058455A
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Prior art keywords
cylinder means
piston
cylinder
fuel
radial bore
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US91007A
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English (en)
Inventor
Hofer Gerald
Eheim Franz
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Robert Bosch GmbH
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Robert Bosch GmbH
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
    • F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
    • F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
    • F02M41/124—Throttling of fuel passages to or from the pumping chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M41/00—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor
    • F02M41/08—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined
    • F02M41/10—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor
    • F02M41/12—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor
    • F02M41/123—Fuel-injection apparatus with two or more injectors fed from a common pressure-source sequentially by means of a distributor the distributor and pumping elements being combined pump pistons acting as the distributor the pistons rotating to act as the distributor characterised by means for varying fuel delivery or injection timing
    • F02M41/125—Variably-timed valves controlling fuel passages
    • F02M41/127—Variably-timed valves controlling fuel passages valves being fluid-actuated slide-valves, e.g. differential rotary-piston pump

Definitions

  • the present invention relates to the injection pump type of fuel supply system for internal combustion engines.
  • One of the objects of the present invention is to provide a fuel supply system of the above type wherein all controls, except the contro-l which determines the idling speed of the engine, are fully automatic.
  • Another object of the present invention is to provide a fuel supply system of the above type wherein the only manually operable structure is ⁇ a throttle for the fuel supply, this throttle serving to determine the idling speed.
  • An additional object of the present invention is to provide ia fuel supply system of the above type with an automatic control structure, as referred to above, which is capable in a fully automatic manner of regulating the fuel output of the injection pump to -amounts which will provide total, smoke-free combustion ⁇ in the speed range from idling speed to maximum speed yat full load.
  • Still another object of the present invention is to provide a structure capable of accomplishing the above objects and at the same time being simple, rugged, compact and easily adjustable for providing optimum operation.
  • the present invention includes, in a fuel supply system for internal combustion engines, an injection pump having a cylinder means supported for axial movement and formed with a radial bore.
  • An axially bored piston of the injection pump reciprocates in the cylinder means and has at all times a free end located therein, this piston being formed adjacent its free end with a radial bore passing from the interior to the exterior of the piston and communicating with the radial bore of the cylinder means during part of vthe stroke of the piston.
  • a return-flow conduit means communicates with the radial bore of the cylinder means to return fuel therefrom back to ⁇ a fuel tank
  • an enginedriven pump means communicates with the fuel tank and with "a supply conduit means for delivering fuel along the supply conduit means to the cylinder means at a pressure which increases and decreases with increases and decreases in the engine speed, respectively.
  • a spring means cooperates with the cylinder means to maintain the latter at a rest position where .its radial bore is most distant from the radial bore of the piston when the latter is at the end of its suction stroke, and in this rest position of the cylinder means the injection pump will deliver the greatest amount of fuel to the engine.
  • a pressureresponsive means communicates with the supply conduit means and lcooperates with the cylinder means to move the latter in opposition vto the spring means in a direction which locates the radial bore of the cylinder means vcloser to the radial bore of the piston, when the latter is at the end of its suction stroke, as the engine speed increases, so that the fuel output of the injection pump is automatically reduced as Vthe engine speed increases.
  • a manually operable throttle means is located in the supply conduit means to control the flow of fuel therethrough, and this manually operable throttle means is located downstream of the connection of the pressureresponsive means to the supply conduit means.
  • This manually operable throttle ⁇ means forms the sole structure which determines the idling speed of the engine, Vwhile the axially movable cylinder means forms the sole structure .for determining .the maximum engine speed.
  • FIG. l is a partly diagrammatic sectional elevation of one possible embodiment of a fuel supply system according to the present invention.
  • FIG. 2 diagrammatlically illustrates the operation of the injection pump.
  • van injection pump housing 1, 2 which includes the lower part 1 and the upper part Z fixed to the lower part 1.
  • the drive shaft 3 of the injection pump is guided for rotation by the lower wall of the housing, and this shaft 3 is driven in a known way from the engine.
  • a cam disk 4 which is fixed rigidly to the shaft 3 for rotation therewith, as by being formed integrally therewith, for example.
  • the injection pump is designed to supply fuel to a four-cylinder engine, and therefore, the cam disk 4 is provided ⁇ with four camming portions 5 equidistantly distributed angularly labout the shaft 3.
  • the injection pump includes a piston 7 which is axially bored .throughout rits entire length, as shown in FIG. l, and it will be noted that the piston 7 is stepped so that the upper portion of the piston 7 is of smallest diameter, the intermediate portion is of intermediate diameter, and the lowermost portion, as viewed in FIG. l, is lof maximum diameter.
  • This lowermost portion of the piston 7 forms the driven end thereof and takes the form of a flange S which for the greatest part of its thickness ⁇ is located within a recess formed in the upper end face of the cam disk 4.
  • the piston 7 is coaxial with the shaft 3.
  • a washer 9 engages the flange 3 and also engages the bottom end of a coil spring 11 which engages at its top end a thrust bearing 12 coaxial with rthe piston 7 and bearing lagainst the .housing part 2.
  • the spring 11 thus maintains the camming portions 5 at ⁇ all times in engagement with the rollers 6 whose axes of rotation, respectively, are stationary.
  • a pin 13 is xedly carried by the cam disk t and extends into a cutout formed in the lflange 8 ⁇ so that the piston 7 is constrained to rotate with the shaft 3 and disk 4.
  • piston 7 will also be constrained to reciproc-ate axially with the shaft 3 and cam ⁇ disk 4.
  • the intermediate portion of the piston 7 is guided for axial movement by -a xylindrical guide 14 which is xed to the housing part 2 in the interior thereof as by having a press ⁇ lit therein.
  • the piston v7 extends completely through the cylindrical guide 14 which remains stationary.
  • the upper part of the piston 7, which is of smallest diameter, extends slidably into a cylinder means 15 to reciproca-te therein, and the free end of the ⁇ axially bored piston 7 is located at all times within the cylinder means 115.
  • the housing part 2 forms a means which supports the cylinder means 15 for axial movement.
  • a plug ⁇ 16 closes the interior of the piston 7 at its end nearest the shaft 3, and this plug 16 is pressed against by one end of a spring 17 whose other end presses .the nonreturn valve 18 upwardly, as viewed in FIG. l, against Ia valve seat formed by a frustoconical shoulder in the interior of the piston 7.
  • the spring 17 urges the valve '18 to its closed position engaging this valve seat.
  • the valve 18 separates the working or pumping chamber 19 of the injection pump from the pressure chamber 2t? within the piston 7.
  • the valve ⁇ 18 is xed at its end which is directed toward the chamber 119 to a guide which is freely slidable within the piston 7 land which is formed with axial grooves providing free communication between the chambers 19 and 20 whenever the valve 18 is displaced from its seat.
  • the piston 7 is formed with -a radial bore 21 communicating with the pressure chamber 20, and the guide cylinder 14 is formed with four radial bores 22 with which the bore 21 successively communicates. Only one of the bores 22 is shown in the drawing for the sake of clarity.
  • the housing part 2 is formed with a discharge passage 23 communicating with each bore 22 and terminating in an outlet opening 24.
  • a tube 25 is uidtightly connected with each outlet 24 and communicates with an injection nozzle 26. These nozzles are located in a conventional manner in the engine communicating with the cylinders thereof to deliver fuel thereto.
  • the piston 7 is also formed with four radial bores 27 whose axes are located in a common plane normal to the axis of the piston 7, and these four radial bores 27 are uniformly distributed about the axis of the piston.
  • These bores 27 communicate successively with a supply conduit means formed in part by the radial bore 28 of the guide cylinder 14.
  • the bores 27 successively communicate with the bore 23 of the supply conduit means which includes in addition to the bore 28, the bore 29 formed in the housing part ⁇ 2 and forming an extension of the bore 2S and the tube 6G which is uidtightly connected with the bore 29.
  • a manually operable throttle means 30 is located in the supply conduit means to control the flow of fuel therefrom to the charnber 19 which is located in part Within the cylinder means 15, ⁇ and this manually operable throttle means 30 is in the form of a rotary valve member passing transversely across the bore 29 and formed with a bore which may be positioned coaxially with the bore 29 in the angular position of the valve 30 shown in solid lines in FIG. l. Any suitable mechanical transmission is accessible to the operator and connected to the valve 39 to enable the operator to position the valve 3) at a selected angular position.
  • a spring means 31 is provided to oppose axial movement of the cylinder means 1'5 in a downward direction, as viewed in .iF-IG. l, and this spring means 31 takes the form of a coil spring which bears at its bottom end ⁇ against Vthe stationary guide cylinder 14. At its top end the spring 3'1 bears against a snap ring 32 located in a groove formed in the exterior of the cylinder means 15. The spring 31 yieldably maintains the cylinder means 15 in its rest position illustrated in FIG. l where a ⁇ hollow cap member 33 threadedly connected to the cylinder 15 bears against a plug 34 threaded into the top end of the housing part 2.
  • This plug 34 closes a chamber 35 which surrounds the cylinder means 15 and which is formed within the upper portion of the housing part 2.
  • An adjusting screw 36 is threadedly carried by the plug 34, and a lock nut 37 is threadedly carried by the screw 36 for iixing the axial position thereof.
  • An elongated pin 38 is pro- .vided at its bottom end with an enlarged head 39 which is cylindrical and which has a duid-tight slidable fit within the cylinder means 15.
  • This head 39 of the pin 3S has a tit in the cylinder 15 which is as tight as possible while enabling the cylinder 15 to slide axially with respect -to the head 39.
  • This head 39 of the pin 38 provides the upper boundary of the pump chamber 19.
  • the pin 38 iixedly carries .a collar 41 which is located within a cutout formed in the screw 36.
  • the screw 36 may be formed at its Ibottom end with a T-slot which receives the collar 41 in the manner illustrated in FIG. l, so that in this way the screw 36 may be turned for adjusting the axial position of the head 39.
  • the cap 33 which is xed to the cylinder 15 for movement therewith has at its top end, yas viewed in FIG. l, an annular wall engaged by the top end of a spring 42 which forms, as will be apparent from the description below, an additional spring means for opposing axial movement of the cylinder means 15.
  • the spring 42 presses at its bottom end, as viewed .in FIG. l, against a washer 43 located against the upper end, as viewed in FIG. l, of the cylinder means 15.
  • the cylinder means 15 is formed with an inner shoulder 44, directed toward the washer 43 and engaged by a washer 45, and between the washers 43 and 45 is located an annular dished spring 46 which forms still another spring means opposing axial movement of the cylinder means d5, as will be apparent from the description which follows.
  • the cap 33 forms together with the upper end of the cylinder -15 a pressure-responsive means which cooperates with the cylinder means 15 for moving the latter automatically in response .to pressure changes in the fuel within the supply conduit means 60, 29, 28, and for this purpose the housing part 2 is formed with a bore 47 providing communication between the chamber 35 and the supply conduit means at a part thereof located upstream of the throttle means 30.
  • the cap 33 is provided with Ian opening 48 which provides communication between the interior 33' of the cap 313 and the chamber 35.
  • the cylinder means 15 separates the chamber 35 from a chamber 49 in the housing part 2 which receives the Spring means 31.
  • This chamber 49 forms part of a return-flow conduit means which serves to return fuel lfrom a radial bore 52 formed in the cylinder means 15 to a fuel tank 56 shown digrammatically at the bottom of FIG. 1.
  • This return-flow conduit means includes, in Aaddition to the chamber 49, a bore 50 formed in the housing part 2 and the chamber 51 formed by thehousing part 1.
  • the return-flow conduit means includes the tube 62 leading lfrom the chamber 51 to the tank 56, and this tube 62 carries la non-return valve 63.
  • the non-return valve 63 automatically opens in response to a relatively small increase in pressure and serves to prevent emptying of the chambers 49 and 51.
  • the piston 7 is formed adjacent its upper free end, which is located at all times within the cylinder means 15, with at least one radial bore 54 communicating with an annular groove 53 formed in the exterior of the piston 7, and in this way the pump chamber 19 which extends between the head 39 of the pin 38 and the valve 18 communicates at all times with the groove 53.
  • the groove S3 overlaps the bore 52 so that during a part of the stroke of the piston 7 the radial bores 52 and 54 will communicate with each other, and of course at this time fuel will flow from the chamber 19 through the bores 54 and 52 back through the return-dow conduit means 49, 5t), 51, 62 to tank 56.
  • An engine-driven pump 57 communicates with the tank 56 and through a lter 59 with the tube 60, so that in this way fuel is pumped from the tank 56 to the supply conduit means 60, 29, 2S, and the engine-driven pump 57 forms a means which supplies fuel along the supply conduit means at pressures which increase and decrease as the engine speed increases and decreases, respectively.
  • a non-return valve 61 communicates through a suitable conduit with the discharge side of the pump 57 and with the conduit 62, and this valve 61 will open when a predetermined pressure is reached in the supply con duit means for directing the overow fuel back to the -tank 56.
  • a throttle 61' which contributes to the maintenance in the supply conduit means 60, 29, 2S of a fuel pressure which is dependent upon the speed of operation of the pump 57 and thus upon the speed of the engine which drives the pump 57.
  • the piston 7 is shown in FIG. l at the end of its suction stroke.
  • a pressure stroke of the piston 7 commences, vand during the initial part of the pressure stroke the bore 2'7 which communicates with the bore 28 turns away from the latter so that the piston now closes the bore 2S and thus the supply conduit means no longer communicates with the pump chamber 19.
  • the effective pressure stroke starts and continues until the bores 54 communicate through the groove 53 with the bore 52.
  • the fuel in the chamber 19 acts, during the effective pressure stroke of the piston to open the valve 18 in opposition to the spring 2G so that the fuel ows at this time into the pressure chamber 20 and from there through the bore 21 into one of the bores 22 and then on through the passage 23 which communicase therewith and the conduit 25 to the injection nozzle 26 of the particular cylinder.
  • the valve 18 closes and the fuel ows from the chamber 19 through the bores 54 and 52 and the return-flow conduit means 49, Si), .51, 62 back to the tank 56, the pressure of the fuel upstream of the valve 63 being suflicient to automatically open this valve at this time.
  • the fuel output of the injection pump of the invention is at a maximum. This maximum fuel output is necsary for starting the internal combustion engine.
  • the ordinate indicates the quantity of fuel delivered by the injection pump, and the total of the amounts indicated at a, b and c is the amount of fuel delivered by the pump when the engine is started.
  • the operator turns the throttle valve 36 so that its passage -has approximately the 4inclined position shown in dotted lines in FIG. l, and in this way the cross section of the -bo-re 29 through which the fuel can flow is greatly reduced.
  • the fuel output at this time is shown by the dot-dash line at the lower left portion of FIG. 2, and the idling speed is indicated -at n along the abscissa of :the diagram of FIG. 2.
  • the throttle means 36 forms the only ⁇ structure for determining the idling speed nl, and in fact the throttle means 30 is the only part of the structure of the invention which is operated manually.
  • the throttle means y30 is again returned to the solid line position shown in FIG. l.
  • the engine speed will increase to the highest engine speed at full load indicated at n2 in FiG. 2.
  • the pressure-responsive means acts to displace the cylinder means 15 further in a ⁇ downward direction, las viewed in FIG. l, and during this time the cylinder means 15 will be displaced through a second increment b.
  • the spring means 46 as Well as the spring means 31 opposes the movement of the cylinder means 15.
  • the bore 52 will approach even closer to the bores 542 when the piston 7 is at the end of its suction stroke, and therefore the fuel output will be further reduced along the range c indicated in FIG. 2.
  • the engine can only reach the maximum engine speed n3 indicated in FIG. 2.
  • this limitation on the maximum engine speed is 'brought about .'by the movement of the cylinder means 15 in response to the increase in the pressure of the fuel delivered ⁇ by the pump 57.
  • the spring means 31 acts -duringthe entire movement of the cylinder means 15 to oppose movement thereof downwardly from its rest position shown in FIG. Yl, and this spring means 31 is the yonly spring means which acts during the iirst increment of movement a.
  • the spring means 46 acts only during -t-he second increment of movement, and
  • the spring means 42 acts only when the cylinder means I moves beyond the second increment of movement.
  • the coordinates of FIG. 2 may indicate the values shown in parentheses in FIG. 2.
  • the abscissa may indicate the spr-ing forces urging the cylinder means l5 back to its rest position shown by p
  • lwhile the ordinate may indicate the extent of movement of the cylinder means shown by the value s. In this event the graduations of the ordinate s increase in a downward direction and have a zer-o value at the maximum fuel output.
  • an injection pump having an axially bored piston and a cylinder means in which said piston reciprocates, said cylinder means land piston defining a pumping chamber from which fuel is pumped to the engine and said piston having a free end located at all times in said cylinder and being formed adjacent said free end with at least one radial bore passing from the interior of said piston to the exterior surface thereof, said cylinder means being formed also with at least one radial bore with which said radial bore of said piston communicates during part of the stroke of said piston; means communieating with said radial bore of said cylinder means for directing fuel therefrom back to a fuel tank; and means cooperating with said cylinder means for automatically regulating the axial position thereof only in accordance with the speed of the engine which is supplied with fuel by said injection pump so that the moment of communication between said radial bores will vary only with variations in engine speed, the axial positioning of said cylinder means being the sole control for the maximum speed of the engine.
  • an injection pump having an axially bored piston and an axially movable cylinder means in which said piston reciprocates, said piston having a free end located at all times in said cylinder means and formed adjacent said free end with a radial bore passing from the interior of said piston to the exterior surface thereof and said cylinder means being formed also with a radial bore passing therethrough and communicating with said radial bore of said piston during a part of the stroke thereof; supply conduit means communicating with said injection pump for supplying fuel thereto from a fuel tank; return flow conduit means communicating with said radial Ibore of said cylinder means for directing fuel therefrom back to said tank; manually operable throttle means cooperating with said supply conduit means for regulating the ow of fuel to said injection pump, said throttle means forming the sole structure for determining the idling speed of the engine; spring means urging said cylinder means in one direction; and automatic pressure-responsive means cooperating with said cylinder means and responding only to the pressure of fuel in said supply conduit means
  • an injection pump having an axially bored piston and an axially movable cylinder means in which said piston reciprocates, said piston having a free end located at all times in said cylinder means and formed adjacent said free end with a radial bore passing from the interior of said piston to the exterior surface thereof and said cylinder means being formed also with a radial bore passing therethrough and communicating with said radial bore of said piston during a part of the stroke thereof; supply conduit means communicating with said injection pump for supplying fuel thereto from a fuel tank; means cooperating with said supply conduit means for maintaining fuel therein at a pressure which varies directly with variations in engine speed; return flow conduit means communicatin g with said radial bore of said cylinder means for directing fuel therefrom back to said tank; manually operable throttle means cooperating with said supply conduit means for regulating the flow of fuel to said injection pump, said throttle means forming the sole structure for determining the idling speed of the engine; spring means urging said cylinder means in
  • an injection pump including an axially bored piston and means for reciprocating the same from one dead-center position at the end of its suction stroke axially along a pressure stroke to an opposed deadcenter position and then back to said one dead-center position, said injection pump including an axially movable cylinder means in which said piston reciprocates, said piston having a free end located at all times in said lcylinder means and being formed adjacent said free end With at least one radial bore, and said cylinder means also being formed with a radial bore which communicates with said radial bore of said piston during a part of the stroke thereof; a fuel tank; retum-iiow conduit means communicating with said radial bore of said cylinder means and said tank for returning fuel from said radial bore of said cylinder means to said tank; supply conduit means communicating with the interior of said cylinder means for supplying fuel thereto; engine-driven pump means communicating with said tank and said supply conduit means for supplying fuel at pressures which'vary proportionate
  • an injection pump including an axially bored piston and means for reciprocating the same from one dead-center position at the end of its suction stroke axially along a pressure stroke to an opposed dead-center position and then back to said one deadcenter position, said injection pump including an axially movable cylinder means in which said piston reciprocates, said piston having a free end located at all times lin said cylinder means and being formed adjacent said free end with at least one radial bore, and said cylinder means also being formed with a radial bore which communicates with said radial bore of said piston during a part of the stroke thereof; a fuel tank; return-now conduit means communicating with said radial bore of said cylinder means and said tank for returning fuel from said radial bore of said cylinder means -to said tank; supply conduit means communicating with -the interior of said cylinder means for supplying fuel thereto; engine-driven pump means communicating with said tank and said supply conduit means for supplying fuel at pressures which vary proportionately with
  • cylinder means having a Wall portion formed with a radial bore; support means supporting said cylinder means ⁇ for axial movement; an axially bored piston coaxial With and slidable Within said cylinder means; means for reciprocating said piston along pressure and suction strokes, said piston having a free end located at all times in said cylinder means and said axial bore of said piston communicating at all times with the interior of said cylinder means, said piston being formed adjacent said free end thereof With a radial bore which communicates with said radial bore of said cylinder means during part of the stroke o f said piston; a fuel tank; return-now conduit means communicating with said radial bore of said cylinder means and said tank for conveying f-uel from said radial bore of said cylinder means back lto said tank; first spring Vmeans c ooperating W-ith said cylinder means for yieldably maintaining the latter in a rest position Where said radial bore thereof is at its maximum distance from said radial Lbore
  • cylinder means having a Wall portion formed with a radial bore; support means supporting said cylinder means for axial movement; an axially ⁇ bored piston coaxial with and slidable within said cylinder means; means for reciprocating said piston along pressure and suction strokes, said piston having a free end located at -all times in said cylinder means and said axial 'bore of said piston communicating at all times with the interior of said cylinder means, said piston being formed adjacent said free end thereof -vvith a radial bore which communicates with said radial bore of said cylinder means duringpart of the stroke of said piston; a fuel tank; return-ilow conduit means communieating With said radial bore of said cylinder means and said tank for conveying fuel ⁇ from said radial bore of said cylinder means back to said tank; first spring means cooperating With said cylinder means for yieldably ⁇ maintaining the latter in a rest position Where said radial bore thereof is at its maximum distance from ⁇ s
  • cylinder means having a wall portion formed with a radial bore; support means supporting said cylinder means for axial movement; an axially bored piston coaxial with and slidable within said cylinder means; means for reciprocating said piston along pressure and suction strokes, said piston having a free end located at all times in said cylinder means and said axial bore of said piston communicating at all times with the interior of said cylinder means, said piston being formed adjacent said free end thereof with a radial bore which communicates With said radial bore of said cylinder means during part of the stroke of said piston; a fuel tank; return-How conduit means communicating with said radial bore of said cylinder means and said tank for conveying fuel from said radial bore of said cylinder means back to said tank; first spring means cooperating with said cylinder means for yieldably maintaining the latter in a rest position where said radial bore thereof is at its maximum distance from said radial bore of said piston when the latter is at the end of its suction stroke; supply conduit means communicating with the interior
  • cylinder means having a wall portion formed with a radial bore; support means supporting said cylinder means for axial movement; an axially bored piston coaxial with and slidable within said cylinder means; means for reciprocating said piston along pressure and suction strokes, said piston having a free end located at all times in said cylinder means and said laxial bore of said piston communicating at all times With the interior of said cylinder means, said piston being formed adjacent said free end thereof with a radial bore which communicates with said radial bore of said cylinder means during part of the stroke of said piS- ton; a fuel tank; return-flow conduit means communicating with said radial bore of said cylinder means and said tank for conveying fuel from said radial bore of said cylinder means back to said tank; first spring means cooperating With said cylinder means for yieldably maintaining the latter in a rest position Where said radial bore thereof is at its maximum distance from said radial bore of said piston when the latter is at the end of its suction stroke; supply conduit
  • cylinder means having a Wall portion formed with a radial bore; support means supporting said cylinder means for axial movement; an axially bored piston coaxial with and slidable Within said cylinder means; means for reciprocating said piston along pressure and suction strokes, said piston having a free end located at all times in said cylinder means and said axial bore of said piston communicating at all times with the interior of said cylinder means, said piston being formed adjacent said free end thereof with a radial bore which communicates with said radial bore of said cylinder means during part of the stroke of said piston; a fuel tank; return-flow conduit means communieating with said radial bore of said cylinder means and said tank for conveying fuel from said radial bore of said cylinder means back to said tank; first spring means cooperating ⁇ with said cylinder means for yieldably maintaining the latter in a rest position Where said radial bore thereof is at its maximum distance from said radial bore of said piston when the latter is at the end of its suction stroke
  • cylinder means having a Wall portion formed with a radial bore; support means supporting said cylinder means for axial movement; an axially bored piston coaxial With land slidable within said cylinder means; means for reciprocating said piston along pressure and suction strokes, said pis-ton having a free end located at all times in said ⁇ cylinder means and said axial 'bore of said piston communicating at all times with the interior of said cylinder means, said piston being formed adjacent said free end thereof with a radial bore which communicates with said radial bore of said cyinder means during part of the stroke of said piston; a fuel tank; return-flow conduit means communicating With said radial bore of said cylinder means -and said tank for conveying fuel from said radial bore of -said cylinder means back to said tank; first spring means cooperating With said cylinder means for yieldably maintaining the latter in a rest position Where said radial bore thereof is at its maximum distance from Said radial bore of said piston when
  • cylinder means having a wall portion formed with a radial bore; support means supporting said cylinder means for axial movement; an axially bored piston coaxial with and slideable within said cylinder means; means for reciprocating said piston along pressure and suction strokes, said piston having a free end located at all times in said cylinder means and said axial bore of said piston communicating at all times with the interior of said cylinder means, said piston being formed adjacent said free end thereof with a radial bore which communicates with said radial bore of said cylinder means during part of the stroke of said piston; a fuel tank; return-flow conduit means communicating with said radial bore of said cylinder means and said tank for conveying fuel from said radial bore of said cylinder means back to said tank; first spring means cooperating With said cylinder means for yieldably maintaining the latter in a rest position Where said radial bore thereof is at its maximum distance from said radial bore of said piston when the latter is .at the end of its suction stroke; supply conduit means communicating with the interior
  • an injection pump in combination, cylinder means having a Wall portion formed With a radial bore; support means supporting said cylinder means for axial movement; an axially bored piston coaxial with and slidable within said cylinder means; means for reciprocating said piston along pressure and suction strokes, said piston having a free end located at all times in said cylinder means and said axial bore of said piston communicating at all times with the interior of said cylinder means, said piston being formed adjacent said free end thereof with a radial bore which communicates with said radial bore of said cylinder means during part of the stroke of said piston; a fuel tank; return-flow conduit means communicating with said radial bore of said cylinder means and said tank for conveying fuel from said radial bore of said cylinder means back to said tank; first spring means cooperating With said cylinder means for yieldably maintaining the latter in a rest position Where said radial bore thereof is at its maximum distance from said radial bore of said piston when the latter is at the end of its suction stroke; supply conduit means communicating With the
  • cylinder means having a Wall portion formed with a radial bore; support means supporting said cylinder means for axial movement; an axially bored piston coaxial with and slidable Within said cylinder means; means for reciprocating 5 said piston along pressure and suction strokes, said piston having a free end located at all times in said cylinder means and said axial bore of said piston communicating at all times with the interior of said cylinder means, said piston being formed adjacent said free end thereof with a radial bore which communicates with said radial bore of said cylinder means during part of the stroke of said piston; a fuel tank; return-110W conduit means communieating with said radial bore of said cylinder means and said tank for conveying fuel from said radial bore of said cylinder means back to said tank; rst spring means cooperating with said cylinder means for yieidably maintaining the latter in a rest position where said radial bore thereof is at its maximum distance from said radial bore of

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
US91007A 1960-02-24 1961-02-23 Injection pump Expired - Lifetime US3058455A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB56793A DE1109955B (de) 1960-02-24 1960-02-24 Kraftstoffeinspritzpumpe an einer Brennkraftmaschine

Publications (1)

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US3058455A true US3058455A (en) 1962-10-16

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US91007A Expired - Lifetime US3058455A (en) 1960-02-24 1961-02-23 Injection pump

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US (1) US3058455A (de)
CH (1) CH381920A (de)
DE (1) DE1109955B (de)
FR (1) FR1280319A (de)
GB (1) GB912725A (de)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3288124A (en) * 1963-07-12 1966-11-29 Hartford Machine Screw Co Pump governor
US3309996A (en) * 1964-02-05 1967-03-21 Cav Ltd Liquid fuel injection pumps
US3311062A (en) * 1964-07-10 1967-03-28 Bosch Gmbh Robert Fuel injection pump
US3333542A (en) * 1965-04-07 1967-08-01 Bosch Gmbh Robert Fuel injection pump
US3724436A (en) * 1970-04-02 1973-04-03 Nippon Denso Co Fuel feed control device for internal combustion engines
US3777730A (en) * 1972-03-20 1973-12-11 Caterpillar Tractor Co Fuel limiting device
US3848576A (en) * 1972-11-29 1974-11-19 Bosch Gmbh Robert Fuel injection pump for internal combustion engines
US3886922A (en) * 1973-09-17 1975-06-03 Gen Motors Corp Engine speed governor with peak load control
US3927654A (en) * 1973-08-22 1975-12-23 Cummins Engine Co Inc Fuel supply system
US4036193A (en) * 1971-07-30 1977-07-19 Diesel Kiki Kabushiki Kaisha Electronically controlled fuel injection pump
US4050856A (en) * 1974-03-22 1977-09-27 Diesel Kiki Co., Ltd. Dash pot arrangement for distribution-type fuel injection pump cut off barrel
US4082073A (en) * 1976-06-16 1978-04-04 General Motors Corporation Engine speed governor with improved peak load control
US4091771A (en) * 1974-05-22 1978-05-30 Daimler-Benz Aktiengesellschaft Injection device for injecting an additional, small fuel quantity into an external auto-ignition internal combustion engine operating according to the stratified-charge principle
US4094201A (en) * 1975-05-21 1978-06-13 Robert Bosch Gmbh Fuel injection pump for internal combustion engines
US4284047A (en) * 1978-09-26 1981-08-18 Robert Bosch Gmbh Apparatus for controlling the air-fuel quantity ratio in internal combustion engines
US4449504A (en) * 1982-03-31 1984-05-22 Nippondenso Co., Ltd. Distributor type fuel injection pump
US4702680A (en) * 1985-05-15 1987-10-27 Robert Bosch Gmbh Fuel injection pump
US5067880A (en) * 1989-05-03 1991-11-26 Kloeckner-Humboldt-Duetz Ag Fuel injection device
US5167495A (en) * 1990-07-26 1992-12-01 Bendix Europe Services Techniques Reciprocating hydraulic pump
US20070237661A1 (en) * 2006-04-05 2007-10-11 Tsun-Sheng Chen Hand-operated reciprocating pump

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1156605B (de) * 1961-08-25 1963-10-31 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer mehrzylindrige Brennkraftmaschinen
DE2703685A1 (de) * 1977-01-29 1978-08-03 Bosch Gmbh Robert Kraftstoffeinspritzpumpe
JPS53146029A (en) * 1977-05-23 1978-12-19 Nippon Soken Inc Fuel injector for internal combustion engine
US4583508A (en) * 1985-01-07 1986-04-22 Ford Motor Company Positive displacement electronic fuel injection pump
DE3524241A1 (de) * 1985-07-06 1987-01-08 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3806650A1 (de) * 1988-03-02 1989-09-14 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE3806669A1 (de) * 1988-03-02 1989-09-14 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer brennkraftmaschinen
DE102014216782A1 (de) * 2014-08-22 2016-02-25 Continental Automotive Gmbh Vorrichtung für eine Hochdruckpumpe für ein Kraftfahrzeug

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1292981A (en) * 1918-11-30 1919-01-28 Carl W Weiss Fuel distributing and controlling mechanism for internal-combustion engines.
GB697542A (en) * 1951-05-23 1953-09-23 Cav Ltd Liquid fuel pumps
US2810376A (en) * 1954-07-29 1957-10-22 Bosch Gmbh Robert Injection pump

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1058790B (de) * 1958-03-26 1959-06-04 Bosch Gmbh Robert Kraftstoffeinspritzpumpe fuer mehrzylindrige Brennkraftmaschinen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1292981A (en) * 1918-11-30 1919-01-28 Carl W Weiss Fuel distributing and controlling mechanism for internal-combustion engines.
GB697542A (en) * 1951-05-23 1953-09-23 Cav Ltd Liquid fuel pumps
US2810376A (en) * 1954-07-29 1957-10-22 Bosch Gmbh Robert Injection pump

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3288124A (en) * 1963-07-12 1966-11-29 Hartford Machine Screw Co Pump governor
US3309996A (en) * 1964-02-05 1967-03-21 Cav Ltd Liquid fuel injection pumps
US3311062A (en) * 1964-07-10 1967-03-28 Bosch Gmbh Robert Fuel injection pump
US3333542A (en) * 1965-04-07 1967-08-01 Bosch Gmbh Robert Fuel injection pump
US3724436A (en) * 1970-04-02 1973-04-03 Nippon Denso Co Fuel feed control device for internal combustion engines
US4036193A (en) * 1971-07-30 1977-07-19 Diesel Kiki Kabushiki Kaisha Electronically controlled fuel injection pump
US3777730A (en) * 1972-03-20 1973-12-11 Caterpillar Tractor Co Fuel limiting device
US3848576A (en) * 1972-11-29 1974-11-19 Bosch Gmbh Robert Fuel injection pump for internal combustion engines
US3927654A (en) * 1973-08-22 1975-12-23 Cummins Engine Co Inc Fuel supply system
US3886922A (en) * 1973-09-17 1975-06-03 Gen Motors Corp Engine speed governor with peak load control
US4050856A (en) * 1974-03-22 1977-09-27 Diesel Kiki Co., Ltd. Dash pot arrangement for distribution-type fuel injection pump cut off barrel
US4091771A (en) * 1974-05-22 1978-05-30 Daimler-Benz Aktiengesellschaft Injection device for injecting an additional, small fuel quantity into an external auto-ignition internal combustion engine operating according to the stratified-charge principle
US4094201A (en) * 1975-05-21 1978-06-13 Robert Bosch Gmbh Fuel injection pump for internal combustion engines
US4082073A (en) * 1976-06-16 1978-04-04 General Motors Corporation Engine speed governor with improved peak load control
US4284047A (en) * 1978-09-26 1981-08-18 Robert Bosch Gmbh Apparatus for controlling the air-fuel quantity ratio in internal combustion engines
US4449504A (en) * 1982-03-31 1984-05-22 Nippondenso Co., Ltd. Distributor type fuel injection pump
US4702680A (en) * 1985-05-15 1987-10-27 Robert Bosch Gmbh Fuel injection pump
US5067880A (en) * 1989-05-03 1991-11-26 Kloeckner-Humboldt-Duetz Ag Fuel injection device
US5167495A (en) * 1990-07-26 1992-12-01 Bendix Europe Services Techniques Reciprocating hydraulic pump
US20070237661A1 (en) * 2006-04-05 2007-10-11 Tsun-Sheng Chen Hand-operated reciprocating pump

Also Published As

Publication number Publication date
FR1280319A (fr) 1961-12-29
CH381920A (de) 1964-09-15
DE1109955B (de) 1961-06-29
GB912725A (en) 1962-12-12

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