EP3610150A1 - Oil circuit with oil nozzle and passage - Google Patents
Oil circuit with oil nozzle and passageInfo
- Publication number
- EP3610150A1 EP3610150A1 EP18722095.9A EP18722095A EP3610150A1 EP 3610150 A1 EP3610150 A1 EP 3610150A1 EP 18722095 A EP18722095 A EP 18722095A EP 3610150 A1 EP3610150 A1 EP 3610150A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubrication
- duct
- engine according
- engine
- oil
- 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
Links
- 238000005461 lubrication Methods 0.000 claims abstract description 49
- 230000008878 coupling Effects 0.000 claims abstract description 27
- 238000010168 coupling process Methods 0.000 claims abstract description 27
- 238000005859 coupling reaction Methods 0.000 claims abstract description 27
- 239000000446 fuel Substances 0.000 claims description 16
- 238000005553 drilling Methods 0.000 claims description 7
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 230000033001 locomotion Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000314 lubricant Substances 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/02—Arrangements of lubricant conduits
-
- 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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
-
- 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
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/02—Arrangements of lubricant conduits
- F01M2011/021—Arrangements of lubricant conduits for lubricating auxiliaries, e.g. pumps or turbo chargers
-
- 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
- F02M39/00—Arrangements of fuel-injection apparatus with respect to engines; Pump drives adapted to such arrangements
- F02M39/02—Arrangements of fuel-injection apparatus to facilitate the driving of pumps; Arrangements of fuel-injection pumps; Pump drives
Definitions
- the present invention relates to the field of motor vehicles and relates to a high pressure fuel supply pump.
- the invention relates to a high-pressure fuel injection pump, particularly a diesel fuel pump, for a motor vehicle engine, comprising a pusher including a pusher body, a fixed axis of rotation relative to the pusher body, a roller mounted at rotation relative to the pusher body around the fixed axis of rotation and a bearing disposed between the axis of rotation and the roller, the roller being adapted to cooperate with a cam integral with a crankshaft of the engine.
- the invention relates more particularly to lubrication of the contact of the roller of the high-pressure pump with a cam integral in rotation with a crankshaft movable in rotation inside an inner chamber of a motor vehicle engine.
- the invention also relates to an oil circuit of an internal combustion engine of a motor vehicle comprising a high-pressure fuel pump arranged near the coupling face of a crankcase of a heat engine.
- the invention relates to an internal combustion engine of a motor vehicle comprising a crankshaft movable in rotation about a longitudinal axis of the engine.
- the fuel supply to the engine is performed by a high pressure pump that replaces a carburetor and is actuated by the rotation of the crankshaft.
- the high-pressure fuel pump is conventionally a plateau pump which comprises an input shaft rotating a plate which is inclined with respect to the axis and which is likely to solicit axial pistons movably mounted in chambers in which is admitted and ejected the fuel.
- a high pressure pump is fixed outside the engine and can be driven indirectly by the crankshaft via a motion transmission system, comprising pulleys and at least one transmission band which can be a chain or a belt.
- the high pressure pump is actuated by a cam fixed to a shaft movable in rotation about an axis parallel to the axis of the crankshaft, said shaft is rotated by the crankshaft by means of a transmission device comprising drive wheels substantially coplanar and fixed to the end of the crankshaft and the movable shaft and a belt surrounding said wheels or through a cam attached to the crankshaft and sharing the same axis of rotation.
- the high pressure pump can also be actuated by a cam fixed directly to the crankshaft and sharing the same axis of rotation. It is known from the state of the art and in particular from the publication
- FR301 1588-A1 a cam mounted rotatably about an axis coincident with the axis of a motor vehicle engine crankshaft to actuate a high-pressure pump for supplying the engine with fuel. Said cam is disposed between two arms of said crankshaft.
- a disadvantage of this type of arrangement is an increase in the overall size of the engine, particularly in the longitudinal direction of the engine, which does not comply with the restrictions on the dimensions of the engine space in the vehicles.
- a high pressure pump arrangement at one end is also known.
- longitudinal motor facing the coupling side; the actuating cam is then secured to one end of the crankshaft near a flywheel.
- the rotational speed of the roller is important due to the diameter of the cam which is implanted on the crankshaft. It is necessary to provide effective lubrication of the movable elements constituting the high pressure pump.
- a current lubrication solution consists of lubricating by means of nozzles formed in the pusher body and injecting oil at their outlet on the sidewalls of the bearing, which makes it impossible to ensure good homogeneity and good oil flow. in the landing.
- a known solution of such a feed consists of a circulation of oil outside the support of the fuel injection pump and specifically dedicated to the lubricant supply function of the injection pump. This is a complex, expensive solution that induces high pressure losses for the lubricant.
- the object of the invention is to remedy these problems and one of the objects of the invention is a lubrication circuit of the actuating cam of a high pressure fuel supply pump arranged at one end of the crankshaft.
- the object of the invention relates to a lubrication circuit of a high-pressure fuel pump arranged at one end of the engine facing the coupling face, comprising a lubrication duct dug in a wall of the engine. motor, said conduit being simple to obtain and with a reduction in manufacturing costs.
- the object of the invention relates more particularly to a lubricating circuit of a motor vehicle engine engine arranged at a longitudinal end of the engine facing the coupling face of the engine, comprising: - an oil supply duct a cylinder head, hollowed out in a crankcase, a lubrication duct of a high pressure pump actuated by a fixed cam secured to a crankshaft of the engine, a longitudinal main orthogonal oil supply ramp connected with each of the two ducts, characterized in that the supply duct extends substantially parallel to the coupling face in the extension of the lubrication duct at one end of which is disposed an oil flow reduction nozzle.
- the supply duct extends in the extension of the lubrication duct, which can reduce the number of manufacturing operations and in particular the drilling of ducts in the wall of the crankcase of the engine.
- the ducts extend substantially parallel to the coupling face of the engine and in particular the cylinder block facilitating the drilling operation.
- the nozzle allows a reduction of the oil flow towards the high pressure pump.
- the supply duct and the lubrication duct are cylindrical and have an identical internal diameter.
- the two ducts are easy to obtain and in particular using the same tools.
- the supply duct and the lubrication duct are coaxial.
- the supply duct and the lubrication duct come from the same operation, in particular drilling with the same tools.
- the nozzle is formed by an annular ring having radial orifices of different diameters, coaxial with the main ramp and inserted inside said ramp to cover the outlets of each of the two ducts having a radial orifice in front of each of the outlets supply and lubrication ducts.
- the nozzle is formed by the insertion of an annular ring in the end of the main ramp, said ring having radial orifices of different diameters and being coaxial with the main ramp.
- Said ring covers the outlets of each of the outlets of the two ducts in the main ramp, so as to have a radial orifice in front of each outlets.
- the different diameters of the radial orifices of the ring therefore make it possible to obtain a different oil flow rate in the supply duct to the cylinder head, in particular a larger one, from the flow rate in the lubrication duct towards the high-pressure pump.
- the section of the radial orifice vis-à-vis the outlet of the lubrication duct is less than the cross section of the radial orifice vis-à-vis the outlet of the supply duct in the main ramp.
- the ring is part of a blanking plug at one end of the main ramp leading to the coupling face of the engine.
- the ring is part of a closure cap of the end of the main ramp coupling side, which on the one hand reduces the references of the parts to be mounted and secondly a simple axial positioning of the ring.
- the closure cap comprises an indexing means.
- the cap comprises an indexing means capable of ensuring precise angular positioning of the ring part of the plug.
- the indexing means comprises a radial notch extending from a peripheral wall of the plug and received in a notch cut in a wall of the engine.
- the plug has a radial notch extending radially from a peripheral wall of the plug, said notch is received in a notch cut in the wall of the engine and in particular the cylinder block which allows precise angular positioning of the ring by relative to the crankcase wall.
- the plug is mounted at the coupling end of the main ramp by hooping.
- the plug is mounted at the coupling end of the main ramp by hooping, by positioning the notch of the plug in front of the notch cut in the wall of the crankcase, the operation being simple execution.
- FIG. 1 is a schematic view of a crankcase of the engine with the coupling face.
- FIG. 2 is a schematic view from below of a crankcase of the engine with the coupling face.
- FIG. 3 is a diagrammatic longitudinal section view of an end of the motor on the motor coupling side with an arrangement of a high pressure pump.
- - Figure 4 is a schematic longitudinal sectional view of an engine end motor coupling side with an arrangement of a high pressure pump.
- FIG. 5 is a schematic view of the cap according to the invention at a first angle.
- FIG. 6 is a view of the plug under another angle.
- the longitudinal direction X is with respect to the heat engine and is therefore orthogonal to the longitudinal direction of the vehicle for a transversely mounted motor.
- an accessory side of the engine which opens a first accessory end of the crankshaft around which is mounted at least one wheel (not shown) to rotate the axes of the accessory elements (not shown). of the engine such as the water pump, and a coupling face which opens the coupling end of the crankshaft diametrically opposite the first end and connected with a flywheel and a gearbox (not shown).
- an engine or internal combustion engine of a motor vehicle comprises a crankcase 10 comprising at least one cylinder 1 1 in which a piston (not shown) is able to slide in a movement of back and forth along the vertical axis Z of said cylinder and a cylinder head (not shown) covering the upper part of the crankcase facing a motor bonnet of the vehicle.
- the movements of the piston are caused by a variation in volume of a combustion chamber delimited by the wall of at least one cylinder, said piston and the cylinder head.
- the piston is connected to a crankshaft (not shown) arranged along a longitudinal axis X of the motor substantially horizontal and orthogonal to the vertical axis Z.
- a high-pressure pump 12 is associated with the engine to inject fuel into the combustion chamber via injectors, for example. It is arranged on the coupling side side 100 of the crankcase 10 to reduce the size of the engine.
- Said pump comprises a substantially cylindrical body 14 fixed in a direction inclined relative to, for example, the vertical axis Z and having an actuating end 15 opening into an actuating chamber 18 delimited by the wall of the crankcase.
- the high-pressure pump comprises a pusher having at this actuating end a driving roller 13 and at the opposite end 17, in the direction in which the translational movement of the pusher travels back and forth, elements dedicated to the pressurizing the fuel.
- the drive roller 13 rolls bearing on a drive surface, said surface has corrugations and is movable, related to the rotation of the crankshaft.
- This driving surface is for example a peripheral surface of a cam (not shown) of substantially oblong shape which is fixed to rotate with the crankshaft about its axis of rotation which is orthogonal to the plane of the cam and coincides with the crankshaft axis.
- the speed of rotation of the drive roller 13 is important and it is necessary to provide effective lubrication of the bearing disposed between the roller and its mounting axis relative to the pusher body.
- the high pressure pump 12 must comprise lubrication elements ensuring effective lubrication of the sliding contact between the guide housing and the pusher body and the mechanical contact between the cam and the roller 13.
- the invention relates to an arrangement of the high pressure fuel supply pump actuated by means of an actuating cam disposed at the coupling end of the crankshaft facing towards the face.
- coupling 100 of the engine and more particularly the lubrication circuit 50 of the engine comprising the lubrication for said pump.
- the lubrication circuit 50 circulates lubricating liquid which may be oil from a main oil supply manifold.
- the main oil ramp 20 must allow lubrication of the rotating elements disposed in the cylinder head such as camshaft bearings or actuating pawls.
- a feed duct 21 is thus formed in the crankcase having an outlet 22 of a first side in the main ramp 20 and a second outlet on the opposite side of the upper face 23 of the crankcase vis-à-vis with the bolt as shown in Figures 3 and 4.
- the supply duct comprises an axis substantially parallel to the vertical axis Z. Said supply duct 21 thus extends substantially parallel to the coupling face 100 in a vertical direction. It should be noted that for some engines to avoid certain pipes, for example, the supply duct may be inclined relative to the vertical axis Z or not extend parallel to the coupling face 100 without this affecting the scope of the invention.
- the supply duct 21 is preferably obtained by drilling in the crankcase 10. On the other hand, the main ramp 20 must allow the oil to be conveyed to the high-pressure pump 12.
- lubrication 25 is made in the cylinder block along the vertical axis Z presenting a first outlet 26 in the main ramp and a second opening on the opposite side in the actuating chamber 18 substantially facing the drive roller 13.
- the axis of the lubrication duct 25 is therefore substantially inclined with respect to the high pressure pump shaft 12.
- the lubrication duct 25 is in the extension of the supply duct 21. More particularly, the two lubrication and supply ducts 21 are coaxial and obtained by the same drilling operation; they therefore have an identical inner diameter.
- the lubrication duct therefore comprises a nozzle 30 to reduce the oil flow.
- the nozzle 30 is formed by a narrow orifice 28 of reduced cross section radially through an annular ring 27. Said annular ring is inserted into the main ramp 20 and is coaxial with said ramp.
- the outer diameter of the annular ring 27 is slightly greater than the inner diameter of the main ramp to allow mounting by hooping.
- the annular ring 27 thus has a wide orifice 29 and the narrow orifice 28 substantially radially through the annular ring.
- the wide orifice 29 is arranged surrounding the outlet 22 of the supply duct 21 and the diameter of the wide orifice is preferably greater than the diameter of the supply duct 21 so as not to cause pressure losses in the flow. oil in the direction of the cylinder head.
- the narrow orifice 28 is arranged facing the outlet 26 of the lubrication duct 25 in the main ramp 20 and therefore has a different diameter and more particularly much smaller than the diameter of the lubrication duct 25 and the wide orifice 29. Oil can be drained down and the cylinder head without disrupting the flow of oil for the lubrication of the cylinder head.
- the annular ring 27 is part of a closure cap 31 of the main ramp.
- the closure cap 31 thus comprises a substantially cylindrical plate 32 extended axially by the annular ring 27.
- a radial notch 34 extends from the peripheral wall 33 of the cylindrical plate 32 to be received on assembly in a complementary notch cut in the wall of the crankcase.
- the combination of the notch and the notch forms a poka-yoke and allows a mounting reliability of the assembly and more particularly of the arrangement of the annular ring 27 to present the wide orifice 29 in front of the outlet 22 of the duct supply and the narrow orifice 28 opposite the outlet 26 of the lubrication duct.
- the closure cap 31 is presented with the annular ring facing the outlet of the main ramp 20 by making the combination of the notch 34 with the notch 35.
- the stopper is then pressed into the main ramp up to reaching a stop to ensure optimal axial positioning of the annular ring.
- the annular ring has the wide orifice surrounding the outlet 22 of the supply duct and the narrow orifice vis-a-vis with the outlet 26 of the lubrication duct.
- the oil flow rates in each of the two ducts are therefore controlled.
- the lubrication circuit comprises a branch directed towards the cylinder head and another branch to the high pressure pump, the two branches are formed by ducts obtained by the same drilling operation through the main ramp and the oil flow rates in each of the branches is regulated by means of a simple annular ring part of a closure cap of the main ramp 20.
- the plug may have an axially extending blade to limit the section of the outlet 26 of the lubrication duct 25.
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)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1753297A FR3065255B1 (en) | 2017-04-14 | 2017-04-14 | OIL CIRCUIT WITH OIL PASSAGE AND ADJUSTMENT |
PCT/FR2018/050752 WO2018189445A1 (en) | 2017-04-14 | 2018-03-28 | Oil circuit with oil nozzle and passage |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3610150A1 true EP3610150A1 (en) | 2020-02-19 |
EP3610150B1 EP3610150B1 (en) | 2021-11-03 |
Family
ID=59031199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18722095.9A Active EP3610150B1 (en) | 2017-04-14 | 2018-03-28 | Oil circuit with oil nozzle and passage |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3610150B1 (en) |
FR (1) | FR3065255B1 (en) |
RU (1) | RU2739431C1 (en) |
WO (1) | WO2018189445A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113756976B (en) * | 2021-09-29 | 2022-07-15 | 广西玉柴机器股份有限公司 | Combined cylinder body |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2680387B1 (en) * | 1991-08-13 | 1993-10-01 | Renault Regie Nale Usines | CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINE. |
DE19627757A1 (en) * | 1996-07-10 | 1998-01-15 | Bosch Gmbh Robert | Fuel pump |
JP2001073733A (en) * | 1999-08-31 | 2001-03-21 | Fuji Heavy Ind Ltd | Lubricating device for cam of high-pressure fuel pump |
DE102012216594A1 (en) * | 2012-09-18 | 2014-03-20 | Robert Bosch Gmbh | Internal combustion engine with a crankcase |
FR3011588A1 (en) | 2013-10-03 | 2015-04-10 | Renault Sa | DIESEL ENGINE COMPRISING AN INTEGRATED FUEL PUMP |
FR3013774B1 (en) * | 2013-11-22 | 2019-08-23 | Renault S.A.S | LUBRICATING FUEL INJECTION PUMP INTEGRATED WITH ROLLING AXIS OF ROLLER |
-
2017
- 2017-04-14 FR FR1753297A patent/FR3065255B1/en not_active Expired - Fee Related
-
2018
- 2018-03-28 RU RU2019136435A patent/RU2739431C1/en active
- 2018-03-28 EP EP18722095.9A patent/EP3610150B1/en active Active
- 2018-03-28 WO PCT/FR2018/050752 patent/WO2018189445A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
FR3065255A1 (en) | 2018-10-19 |
RU2739431C1 (en) | 2020-12-24 |
WO2018189445A1 (en) | 2018-10-18 |
EP3610150B1 (en) | 2021-11-03 |
FR3065255B1 (en) | 2021-04-09 |
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