EP0881365A2 - Brennkraftmaschinenkonstruktion - Google Patents

Brennkraftmaschinenkonstruktion Download PDF

Info

Publication number
EP0881365A2
EP0881365A2 EP98830316A EP98830316A EP0881365A2 EP 0881365 A2 EP0881365 A2 EP 0881365A2 EP 98830316 A EP98830316 A EP 98830316A EP 98830316 A EP98830316 A EP 98830316A EP 0881365 A2 EP0881365 A2 EP 0881365A2
Authority
EP
European Patent Office
Prior art keywords
engine
structure according
lubricating fluid
engine block
gear wheel
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.)
Granted
Application number
EP98830316A
Other languages
English (en)
French (fr)
Other versions
EP0881365B1 (de
EP0881365A3 (de
Inventor
Vilmo Ferioli
Mario Mingozzi
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.)
VM Motori SpA
Original Assignee
VM Motori SpA
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 VM Motori SpA filed Critical VM Motori SpA
Publication of EP0881365A2 publication Critical patent/EP0881365A2/de
Publication of EP0881365A3 publication Critical patent/EP0881365A3/de
Application granted granted Critical
Publication of EP0881365B1 publication Critical patent/EP0881365B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • 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
    • F01M1/02—Pressure lubrication using lubricating pumps

Definitions

  • the present invention relates to an engine structure for internal combustion engines.
  • engine structure is used to mean the assembly consisting of the engine block and crankcase and the built-in auxiliary services driven by the engine, in particular, the lubricating pump and the suction unit, that is, a device designed to continuously generate a vacuum in a chamber connected to the auxiliary services which require negative pressure for their operation, such as, for example, the brake system of modern cars.
  • auxiliary services are separate from the engine block and are driven through transmission belts.
  • the aim of the present invention is to overcome the disadvantages mentioned above by providing an engine structure that utilizes existing space and does not therefore increase the overall dimensions of the engine.
  • One aspect of the present invention is to provide an engine structure that comprises an engine block, a crankshaft with at least one first gear wheel keyed to it, means for creating suction and means for distributing lubricating fluid under pressure and where the first gear wheel meshes with a second gear wheel that directly drives the means for creating suction and with a third gear wheel that drives the means for distributing lubricating fluid under pressure.
  • Another aspect of the present invention is to provide an engine structure that comprises an engine block, a crankshaft with at least one first gear wheel keyed to it and auxiliary means for creating suction or for distributing lubricating fluid under pressure and where the engine block has at least one hollow to house said auxiliary means.
  • a further aspect of the present invention is to provide an engine structure that comprises an engine block, a crankshaft with at least one first gear wheel keyed to it, means for creating suction and means for distributing lubricating fluid under pressure through suitable supply and delivery ducts and where at least one of these ducts lies mainly outside the engine block.
  • Yet another aspect of the present invention is to provide an engine structure that comprises an engine block, a crankshaft with at least one first gear wheel keyed to it and consisting of a cup gear which provides enough space for an oil seal without increasing the overall dimensions.
  • the numeral 1 indicates an internal combustion engine block from which the end of a crankshaft 2 protrudes, the latter having keyed to it a first cup-shaped gear wheel 3, that is to say, a gear wheel whose teeth 4 lie in a plane that is axially offset with respect to the wheel hub 5 (see Figure 2) in such a way as to create the space necessary for the ideal positioning of an oil seal 40 without increasing the overall dimensions of the gear.
  • the first gear wheel 3 (not illustrated in this Figure) meshes with a second gear wheel 6 keyed to the shaft 7 of a rotor 8 of a suction unit 9 designed to generate a vacuum, for example for the brake system of a motor vehicle.
  • the suction unit 9 is mounted inside a first box-shaped element 11, located in a first hollow 10, preferably blind, made in the engine block 1.
  • the end wall 12 of the first hollow 10 is used as a reference for locating the box-shaped element 11 in which the suction unit 9 is fitted. In this way, the clearance between the rotor 8 of the suction unit and the end wall 12 of the first hollow 10 is reduced to a minimum, depending solely on the tolerances T of the first box-shaped element 11 and that of the rotor 8 (since the first box-shaped element 11 is always in contact with the end wall 12 of the hollow 10, as can be seen in Figure 4).
  • the first gear wheel 3 also meshes with a third gear wheel 13 (see Figure 2) keyed to the shaft 14 of the rotor 19 of a lubricating pump 15.
  • the pump 15 is mounted inside a second box-shaped element 17 located in a second blind hollow 16 made in the engine block 1.
  • the end wall 18 of the second hollow 16 is used as a reference for locating the box-shaped element 17 in which the pump 15 is fitted.
  • the clearance between the rotor 19 of the pump 15 and the end wall 18 of the second hollow 16 is reduced to a minimum, depending, in this case too, solely on the tolerances between the depth of the second box-shaped element 17 and that of the rotor 19.
  • the second box-shaped element 17 comprises a cover 21 that protrudes from said second hollow 16 and that has made in it a first chamber 22 into which the supply duct 23 of the pump 15 leads, in the direction of the arrows F (a part of the supply duct is illustrated in Figures 1 and 2) and a second chamber 24 from which the delivery duct 25 of the pump 15 branches (the connecting port of the delivery duct is illustrated in Figure 1).
  • first chamber 22 and the second chamber 24 are made around the bearing S of a shaft which mounts the third gear wheel 13 and have the same width as the bearing so as not to increase the overall dimensions of the unit.
  • the supply duct 23 and the delivery duct 25 of the engine block 1 communicate with the cover 21 of the box-shaped element 17 through corresponding connecting ducts 23' and 25' (partly illustrated in Figure 1) which lie mainly on the outside of the engine block 1, thus eliminating the need to make the ducts entirely in the engine block 1 using complicated and costly processes.
  • the connecting ducts 23' and 25' connect with corresponding ports (not illustrated) made in the engine block 1 and which, after the second box-shaped element 17 has been fitted, lead into the corresponding first and second chambers 22 and 24 in the second box shaped element 17 itself.
  • the engine block 1 has made in it the first and second hollows 12 and 16 to house the corresponding box shaped elements 11 and 17 each of which has its own fluid supply and delivery ducts.
  • the suction unit 9 is supplied with oil from the engine sump (not illustrated) so that the rotor 8 can be lubricated through a first duct 41 that leads into the area labelled 41' in Figure 3.
  • the rotor 8 creates a vacuum in a second suction duct 42 which communicates with the related service tank.
  • the delivery of the rotor 8, which consists of air mixed with oil, is in turn supplied to a third duct 43 made in the front wall of the first box-shaped element 11 and from here, the mixture is fed back into the engine sump and recycled.
  • the three ducts 41, 42 and 43 of the suction unit 9 are made in and lie entirely inside the engine block 1 which, once these elements have been assembled, is closed by a simple guard, labelled C in the accompanying drawings, without necessitating special machine processes or sealing elements and thereby also reducing the axial dimensions of the engine block 1 as a whole.
  • the valve 26 is designed to enable a part of the fluid delivered by the pump 15 to the delivery duct 25 to be diverted directly into the supply duct 23 through the bypass duct 27 when the delivery pressure of the pump 15 exceeds a preset value.
  • the regulating valve 26 consists of a shutter element 30, preferably cylindrical, fitted in a first section 28 of the bypass duct 27. At a first end of it, the shutter element 30 communicates with the delivery duct 25 of the pump 15 and, close to a second end, it has a plurality of radial holes 31.
  • the second end of the cylindrical element 30 has a shutting element 32 pushed by a spring 33 that is preloaded by a preset, adjustable value, the spring having one end resting against the shutting element 32 and the other end resting against a stop element 34.
  • the spring 33 and the shutting element 32 are positioned inside a second section 29 of the bypass duct that is larger in diameter than the first section 28 and that communicates with the suction duct 23 of the pump 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
EP98830316A 1997-05-30 1998-05-21 Brennkraftmaschinenkonstruktion Expired - Lifetime EP0881365B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97BO000326A IT1292591B1 (it) 1997-05-30 1997-05-30 Struttura di motore per motori a combustione interna.
ITBO970326 1997-05-30

Publications (3)

Publication Number Publication Date
EP0881365A2 true EP0881365A2 (de) 1998-12-02
EP0881365A3 EP0881365A3 (de) 1999-06-09
EP0881365B1 EP0881365B1 (de) 2003-04-09

Family

ID=11342302

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98830316A Expired - Lifetime EP0881365B1 (de) 1997-05-30 1998-05-21 Brennkraftmaschinenkonstruktion

Country Status (4)

Country Link
EP (1) EP0881365B1 (de)
AT (1) ATE237071T1 (de)
DE (1) DE69813077D1 (de)
IT (1) IT1292591B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9435290B2 (en) 2014-08-04 2016-09-06 Achates Power, Inc. Opposed-piston engine structure with a split cylinder block

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB807325A (en) * 1956-06-05 1959-01-14 Fiat Spa Device for transferring oil from a stationary pipe to passages machined inside a rotating crankshaft
DE2833167A1 (de) * 1978-07-28 1980-02-14 Barmag Barmer Maschf Baueinheit, bestehend aus einer oelpumpe zur oelumlaufschmierung einer brennkraftmaschine und einer vakuumpumpe zur erzeugung eines vakuums fuer die bremskraftverstaerkung in kraftfahrzeugen
AT388777B (de) * 1980-11-27 1989-08-25 List Hans Brennkraftmaschine
US4586468A (en) * 1984-10-05 1986-05-06 General Motors Corporation Tandem pump assembly
IT208998Z2 (it) * 1986-12-23 1988-09-02 Fiat Auto Spa Dispositivo di comando per una pompa olio in un motore a combustione interna
JPS648314A (en) * 1987-06-30 1989-01-12 Aisin Seiki Cooling and lubricating device for internal combustion engine
DE3729603A1 (de) * 1987-09-04 1989-03-16 Porsche Ag Schmiervorrichtung fuer einen hubkolbenmotor

Also Published As

Publication number Publication date
ATE237071T1 (de) 2003-04-15
ITBO970326A0 (it) 1997-05-30
ITBO970326A1 (it) 1998-11-30
IT1292591B1 (it) 1999-02-08
EP0881365B1 (de) 2003-04-09
DE69813077D1 (de) 2003-05-15
EP0881365A3 (de) 1999-06-09

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