EP0376901A1 - An internal combustion engine, particularly for motor vehicles - Google Patents
An internal combustion engine, particularly for motor vehicles Download PDFInfo
- Publication number
- EP0376901A1 EP0376901A1 EP89830554A EP89830554A EP0376901A1 EP 0376901 A1 EP0376901 A1 EP 0376901A1 EP 89830554 A EP89830554 A EP 89830554A EP 89830554 A EP89830554 A EP 89830554A EP 0376901 A1 EP0376901 A1 EP 0376901A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- driving shaft
- internal combustion
- combustion engine
- shaft
- auxiliary
- 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- Withdrawn
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Images
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
- F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
-
- 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 internal combustion engine, particularly for motor vehicles, of the type comprising a driving shaft which is rotatable in main bearings, and an oil pump and a pulley for driving auxiliary equipment, which are rotated by one end of the driving shaft.
- the object of the present invention is to produce an engine of the type defined above, in which the operation of the oil pump and the pulley for driving the auxiliary equipment by the driving shaft is free of orbital rotation.
- this object is achieved by virtue of the fact that the end of the driving shaft is hollow, and that an auxiliary shaft coaxial with the driving shaft is coupled torsionally within the hollow end thereof, in axial correspondence with the respective main bearing, and rotates the pump and the pulley.
- the auxiliary shaft can be coupled directly within the hollow end of the driving shaft or, more conveniently, by means of an intermediate sleeve which is in turn fixed torsionally to the hollow end of the driving shaft.
- a four-cylinder internal combustion engine according to the invention is generally indicated 1.
- the engine 1 is constituted essentially by a cylinder block 2 formed integrally with the cylinders 3, their combustion chambers 4, their intake ducts 5 and exhaust ducts 6, the seats 7 for the inlet and exhaust valves 8 and for any spark plugs, not illustrated, a sump structure 9 fitted beneath the cylinder block 2, and a timing control assembly 10 fitted on top of the cylinder block 2 and including a camshaft 22.
- connection of cylinder block 2 to the sump 9 on the one hand and to the timing control assembly 10 on the other is effected in correspondence with integral flanges 2a, 2b formed in single planes and in one piece with the cylinder block 2 and coupled to corresponding continuous integral flanges 9a, 10a formed in single planes on the sump 9 and the timing control assembly 10 respectively.
- the sump 9 is constituted by a structural body for supporting the crankshaft 11 of the engine.
- the sump 9 is formed with integral main bearings 12 for supporting the shaft 11 for rotation by means of main bearing caps 13 and bearings 14.
- One of the end walls of the sump 2 has an aperture 15 which is coaxial with the crankshaft 11 and is defined by an annular flange 16 constituting an integral seat for an oil pump, generally indicated 17, whose impeller is indicated 18.
- the end of the cranksahft 11, indicated 11a that is, the end supported by the main bearing 12 which faces the aperture 15, is hollow and is coupled coaxially to an auxiliary shaft 19 to which the impeller 18 of the oil pump 17 is keyed.
- the torsional coupling between the auxiliary shaft 19 and the hollow end 11a of the crankshaft 11 may be direct or, as in the embodiment illustrated, may be achieved by means of an intermediate sleeve 20 whose outer surface is driven into the hollow end 11a and whose inner surface is splined for the engagement of a corresponding splined end portion 19a of the auxiliary shaft 19.
- the shaft 19 extends out of the sump 9 through the aperture 15 and also drives a pulley 21 for rotating auxiliary equipment of the engine 1.
- the auxiliary shaft 19 is coupled to the crankshaft 11 in axial correspondence with the end main bearing 12, which ensures that the alignment of the auxiliary shaft 19 with the crankshaft 11 is kept constant in use and avoids orbital rotation of the pump 17 and the pulley 21.
- the camshaft 22 of the timing control assembly 10 is driven by means of a belt or chain 23 driven by a driving sprocket 24 fixed frontally and directly to the end 11a of the crankshaft 11 by means of screws 25 which are engaged in slots for enabling the angular adjustment of the timing of the engine.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
An internal combustion engine for motor vehicles, in which the oil pump (17) and the pulley (21) for driving the auxiliary equipment are driven by the crankshaft (11) through an auxiliary shaft (19) which is coupled torsionally within a hollow end portion (11a) of the crankshaft, in axial correspondence with the respective main bearing (12).
Description
- The present invention relates to an internal combustion engine, particularly for motor vehicles, of the type comprising a driving shaft which is rotatable in main bearings, and an oil pump and a pulley for driving auxiliary equipment, which are rotated by one end of the driving shaft.
- The object of the present invention is to produce an engine of the type defined above, in which the operation of the oil pump and the pulley for driving the auxiliary equipment by the driving shaft is free of orbital rotation.
- According to the invention, this object is achieved by virtue of the fact that the end of the driving shaft is hollow, and that an auxiliary shaft coaxial with the driving shaft is coupled torsionally within the hollow end thereof, in axial correspondence with the respective main bearing, and rotates the pump and the pulley.
- By virtue of this concept, and particularly the coupling of the auxiliary shaft to the end of the driving shaft in correspondence with its main bearing, it is ensured that the driving shaft, the oil pump and the auxiliary pulley are perfectly coaxial during rotation, avoiding malfunctions and premature wear which could result from their eccentric rotation.
- The auxiliary shaft can be coupled directly within the hollow end of the driving shaft or, more conveniently, by means of an intermediate sleeve which is in turn fixed torsionally to the hollow end of the driving shaft.
- The invention will now be described in detail with reference to the appended drawings, provided purely by way of non-limiting example, in which:
- Figure 1 is a schematic cross-section of a mutli-cylinder internal combustion engine according to the invention,
- Figure 2 is a schematic partial longitudinal section taken on the line II-II Figure 1, in which some parts have been omitted for simplicity of illustration, and
- Figure 3 shows the detail indicated by the arrow III of Figure 2, on an enlarged scale, complete with the details omitted from Figure 2.
- With reference initially to Figure 1, a four-cylinder internal combustion engine according to the invention, particularly for motor cars, is generally indicated 1.
- The engine 1 is constituted essentially by a cylinder block 2 formed integrally with the cylinders 3, their
combustion chambers 4, theirintake ducts 5 andexhaust ducts 6, theseats 7 for the inlet andexhaust valves 8 and for any spark plugs, not illustrated, asump structure 9 fitted beneath the cylinder block 2, and atiming control assembly 10 fitted on top of the cylinder block 2 and including acamshaft 22. - The connection of cylinder block 2 to the
sump 9 on the one hand and to thetiming control assembly 10 on the other is effected in correspondence withintegral flanges integral flanges 9a, 10a formed in single planes on thesump 9 and thetiming control assembly 10 respectively. - As shown in greater detail in Figure 2, the
sump 9 is constituted by a structural body for supporting thecrankshaft 11 of the engine. In effect, thesump 9 is formed with integralmain bearings 12 for supporting theshaft 11 for rotation by means ofmain bearing caps 13 andbearings 14. - One of the end walls of the sump 2 has an
aperture 15 which is coaxial with thecrankshaft 11 and is defined by anannular flange 16 constituting an integral seat for an oil pump, generally indicated 17, whose impeller is indicated 18. - According to the invention, the end of the
cranksahft 11, indicated 11a, that is, the end supported by themain bearing 12 which faces theaperture 15, is hollow and is coupled coaxially to anauxiliary shaft 19 to which theimpeller 18 of the oil pump 17 is keyed. The torsional coupling between theauxiliary shaft 19 and thehollow end 11a of thecrankshaft 11 may be direct or, as in the embodiment illustrated, may be achieved by means of anintermediate sleeve 20 whose outer surface is driven into thehollow end 11a and whose inner surface is splined for the engagement of a correspondingsplined end portion 19a of theauxiliary shaft 19. - The
shaft 19 extends out of thesump 9 through theaperture 15 and also drives apulley 21 for rotating auxiliary equipment of the engine 1. - In any case, the
auxiliary shaft 19 is coupled to thecrankshaft 11 in axial correspondence with the endmain bearing 12, which ensures that the alignment of theauxiliary shaft 19 with thecrankshaft 11 is kept constant in use and avoids orbital rotation of the pump 17 and thepulley 21. - The
camshaft 22 of thetiming control assembly 10 is driven by means of a belt orchain 23 driven by a drivingsprocket 24 fixed frontally and directly to theend 11a of thecrankshaft 11 by means ofscrews 25 which are engaged in slots for enabling the angular adjustment of the timing of the engine.
Claims (2)
1. An internal combustion engine having a driving shaft which is rotatable in main bearings, and an oil pump and a pulley for driving auxiliary equipment, which are rotated by one end of the driving shaft, characterised in that the said end (11a) of the driving shaft (11) is hollow and in that an auxiliary shaft (19) coaxial with the driving shaft (11) is coupled torsionally within the hollow end (11a) thereof, in axial correspondence with the respective main bearing (12), and rotates the pump (17) and the pulley (21).
2. An engine according to Claim 1, characterised in that an intermediate sleeve (20) is interposed between the hollow end (11a) of the driving shaft (11) and the auxiliary shaft (19) and is coupled for rotation with both.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT68179/88A IT1224053B (en) | 1988-12-30 | 1988-12-30 | INTERNAL COMBUSTION ENGINE PARTICULARLY FOR VEHICLES |
IT6817988 | 1988-12-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0376901A1 true EP0376901A1 (en) | 1990-07-04 |
Family
ID=11308361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89830554A Withdrawn EP0376901A1 (en) | 1988-12-30 | 1989-12-19 | An internal combustion engine, particularly for motor vehicles |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0376901A1 (en) |
BR (1) | BR8906872A (en) |
IT (1) | IT1224053B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992015773A1 (en) * | 1991-03-05 | 1992-09-17 | Saab Automobile Aktiebolag | Hydraulic pump for a vehicle engine |
EP0984143A2 (en) * | 1998-09-03 | 2000-03-08 | Concentric Pumps Limited | Improvements to rotary pumps |
EP2507496A1 (en) * | 2009-12-03 | 2012-10-10 | AVL List GmbH | Internal combustion engine having a cylinder head and a cylinder block |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1352410A (en) * | 1963-03-28 | 1964-02-14 | Auto Union Gmbh | Block comprising a lubricating oil pump and a cooling water pump |
FR2075753A5 (en) * | 1970-01-30 | 1971-10-08 | Alfieri Maserati Officin | |
US3879154A (en) * | 1967-10-23 | 1975-04-22 | Improved Mech Prod Pty Ltd | Gear type fluid motor or pump having fluid pressure compensating means |
GB2019505A (en) * | 1978-04-21 | 1979-10-31 | Bbc Brown Boveri & Cie | Lubricating Piston Type Machine |
GB2047349A (en) * | 1979-04-12 | 1980-11-26 | Gilardini Spa | Rotary Pumps |
DE3142458A1 (en) * | 1980-11-27 | 1982-06-09 | List Hans | INTERNAL COMBUSTION ENGINE |
DE3506928A1 (en) * | 1985-02-27 | 1986-08-28 | Schwäbische Hüttenwerke GmbH, 7080 Aalen | Internal gear pump as lubricating oil pump for an internal combustion engine |
-
1988
- 1988-12-30 IT IT68179/88A patent/IT1224053B/en active
-
1989
- 1989-12-19 EP EP89830554A patent/EP0376901A1/en not_active Withdrawn
- 1989-12-27 BR BR898906872A patent/BR8906872A/en not_active IP Right Cessation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1352410A (en) * | 1963-03-28 | 1964-02-14 | Auto Union Gmbh | Block comprising a lubricating oil pump and a cooling water pump |
US3879154A (en) * | 1967-10-23 | 1975-04-22 | Improved Mech Prod Pty Ltd | Gear type fluid motor or pump having fluid pressure compensating means |
FR2075753A5 (en) * | 1970-01-30 | 1971-10-08 | Alfieri Maserati Officin | |
GB2019505A (en) * | 1978-04-21 | 1979-10-31 | Bbc Brown Boveri & Cie | Lubricating Piston Type Machine |
GB2047349A (en) * | 1979-04-12 | 1980-11-26 | Gilardini Spa | Rotary Pumps |
DE3142458A1 (en) * | 1980-11-27 | 1982-06-09 | List Hans | INTERNAL COMBUSTION ENGINE |
DE3506928A1 (en) * | 1985-02-27 | 1986-08-28 | Schwäbische Hüttenwerke GmbH, 7080 Aalen | Internal gear pump as lubricating oil pump for an internal combustion engine |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992015773A1 (en) * | 1991-03-05 | 1992-09-17 | Saab Automobile Aktiebolag | Hydraulic pump for a vehicle engine |
US5314319A (en) * | 1991-03-05 | 1994-05-24 | Saab Automobile Aktiebolag | Hydraulic pump for a vehicle engine |
EP0984143A2 (en) * | 1998-09-03 | 2000-03-08 | Concentric Pumps Limited | Improvements to rotary pumps |
EP0984143A3 (en) * | 1998-09-03 | 2001-01-10 | Concentric Pumps Limited | Improvements to rotary pumps |
EP2507496A1 (en) * | 2009-12-03 | 2012-10-10 | AVL List GmbH | Internal combustion engine having a cylinder head and a cylinder block |
Also Published As
Publication number | Publication date |
---|---|
IT8868179A0 (en) | 1988-12-30 |
IT1224053B (en) | 1990-09-26 |
BR8906872A (en) | 1990-09-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB SE |
|
17P | Request for examination filed |
Effective date: 19900711 |
|
17Q | First examination report despatched |
Effective date: 19910919 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19920130 |