EP3610150B1 - Ölkreislauf mit öldüse und durchgang - Google Patents

Ölkreislauf mit öldüse und durchgang Download PDF

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Publication number
EP3610150B1
EP3610150B1 EP18722095.9A EP18722095A EP3610150B1 EP 3610150 B1 EP3610150 B1 EP 3610150B1 EP 18722095 A EP18722095 A EP 18722095A EP 3610150 B1 EP3610150 B1 EP 3610150B1
Authority
EP
European Patent Office
Prior art keywords
duct
internal combustion
lubrication
combustion engine
engine according
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.)
Active
Application number
EP18722095.9A
Other languages
English (en)
French (fr)
Other versions
EP3610150A1 (de
Inventor
Jean-Pierre Millon
Ludovic TESSIER
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.)
Renault SAS
Nissan Motor Co Ltd
Original Assignee
Renault SAS
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Renault SAS, Nissan Motor Co Ltd filed Critical Renault SAS
Publication of EP3610150A1 publication Critical patent/EP3610150A1/de
Application granted granted Critical
Publication of EP3610150B1 publication Critical patent/EP3610150B1/de
Active legal-status Critical Current
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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
    • 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
    • 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

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, in particular diesel fuel, 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 arranged between the axis of rotation and the roller, the roller being able 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 internal chamber of a heat engine of a motor vehicle.
  • 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 cylinder block 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 engine is supplied with fuel by a high pressure pump which replaces a carburetor and which is actuated by the rotation of the crankshaft.
  • the high pressure fuel pump is conventionally a plate pump which comprises an input shaft driving a plate in rotation. which is inclined with respect to the axis and which is capable of stressing the axial pistons movably mounted in chambers into which the fuel is admitted and then ejected.
  • a high pressure pump is fixed outside the engine and can be driven indirectly by the crankshaft by means of a movement 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 movable shaft in rotation about an axis parallel to the axis of the crankshaft, said shaft is driven in rotation by the crankshaft by means of a transmission device comprising drive wheels that are substantially coplanar and fixed to the end of the crankshaft and of the movable shaft and a belt surrounding said wheels or by means of a cam fixed to the crankshaft and sharing the same axis of rotation.
  • the high pressure pump can also be actuated by a cam attached directly to the crankshaft and sharing the same axis of rotation.
  • FR3013774-A1 describes another example of an engine in which the high pressure fuel supply pump is driven by a cam mounted on the crankshaft.
  • a drawback of this type of arrangement is an increase in the size of the heat engine, in particular in the longitudinal direction of the engine, which does not comply with the restrictions on the dimensions of the engine space in vehicles.
  • a high pressure pump arrangement is also known at one end. longitudinal motor facing towards the coupling face; the actuating cam is then fixed integral with 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 located on the crankshaft. It is necessary to provide effective lubrication of the moving elements constituting the high pressure pump.
  • a current lubrication solution consists of lubricating by means of nozzles formed in the pusher body and injecting the oil at their outlet on the sides of the bearing, which does not make it possible to ensure good homogeneity and a good flow of oil. in the landing.
  • a known solution of such a supply consists in circulating oil outside the support of the fuel injection pump and specifically dedicated to the function of supplying the injection pump with lubricant. This is a complex, expensive solution that induces high pressure drops for the lubricant.
  • the object of the invention is to remedy these problems and one of the objects of the invention is a circuit for lubricating 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 for a high pressure fuel pump arranged at one end of the heat engine facing the coupling face comprising a lubrication duct hollowed out in a wall of the engine, said duct being simple. to be obtained and with a reduction in manufacturing costs.
  • the supply duct extends in the extension of the lubrication duct, which can reduce the number of manufacturing operations and in particular of drilling the ducts in the wall of the cylinder block of the engine.
  • the conduits extend substantially parallel to the coupling face of the engine and in particular of the cylinder block, facilitating the drilling operation.
  • the nozzle allows a reduction in the oil flow to the high pressure pump.
  • the plug is mounted at the coupling end of the main ramp by shrinking, by first positioning the notch of the plug facing the notch in the wall of the cylinder block, the operation being easy to use.
  • the following description can take into account the longitudinal axis X of the engine and the vertical axis Z orthogonal directed towards the top of the vehicle.
  • longitudinal direction X is relative to the heat engine and therefore is orthogonal to the longitudinal direction of the vehicle for an engine mounted transversely.
  • an accessory face of the engine can be distinguished from which emerges a first accessory end of the crankshaft around which is mounted at least one wheel (not shown) for rotating the axes of the accessory elements (not shown). of the engine such as the water pump, and a coupling face from which opens the coupling end of the crankshaft diametrically opposite the first end and connected with a flywheel and a gearbox (not shown).
  • a thermal or internal combustion engine of a motor vehicle comprises a cylinder block 10 comprising at least one cylinder 11 in which a piston (not shown) is able to slide in a reciprocating movement along the vertical axis Z of said cylinder and a cylinder head (not shown) covering the upper part of the cylinder block facing an engine hood of the vehicle.
  • the movements of the piston are driven by a variation in volume of a combustion chamber delimited by the wall of the at least one cylinder, said piston and the cylinder head.
  • the piston is linked to a crankshaft (not shown) arranged along a longitudinal axis X of the engine which is substantially horizontal and orthogonal to the vertical axis Z.
  • the reciprocating sliding movements of the piston cause a rotational movement of the crankshaft.
  • 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 face side 100 of the cylinder block 10 to reduce the size of the engine.
  • Said pump comprises a substantially cylindrical body 14 fixed in a direction inclined with respect for example to the vertical axis Z and comprising an actuating end 15 opening into an actuating chamber 18 delimited by the wall of the cylinder block.
  • the high-pressure pump comprises a pusher having at this actuating end a drive roller 13 and at the opposite end 17, depending on the direction in which the round-trip translational movement of the pusher takes place, elements dedicated to the pressurizing the fuel.
  • the drive roller 13 rolls resting on a drive surface, said surface has undulations and is mobile, linked to the rotation of the crankshaft.
  • This drive surface is for example a peripheral surface of a cam (not shown) of substantially oblong shape which is fixed in rotation to 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 high and it is necessary to provide effective lubrication of the bearing arranged between the roller and its mounting axis relative to the pusher body.
  • the high pressure pump 12 must include lubrication elements ensuring effective lubrication of the sliding contact between the guide housing and the pusher body and of 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 motor and more particularly the lubrication circuit 50 of the motor comprising the lubrication for said pump. In the lubrication circuit 50 circulates lubricating liquid which may be oil coming from a main oil supply ramp 20.
  • the main oil rail 20 must allow the lubrication of the rotating elements arranged in the cylinder head such as camshaft bearings or actuating pawls.
  • a supply duct 21 is thus hollowed out in the cylinder block having an outlet 22 on a first side in the main ramp 20 and a second outlet on the opposite side of the upper face 23 of the facing cylinder block. with the cylinder head 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 certain engines to avoid certain pipes for example, the supply duct can be inclined with respect to the vertical axis Z or not extend parallel to the coupling face 100 without this having an impact on the scope of the invention.
  • the supply duct 21 is preferably obtained by a bore in the cylinder block 10.
  • a lubrication duct 25 is thus hollowed out in the cylinder block along the vertical axis Z having a first outlet. 26 in the main rail and a second outlet on the opposite side into the actuating chamber 18 substantially opposite the drive roller 13 of the high pressure pump 12.
  • the axis of the lubrication duct 25 is therefore substantially inclined with respect to 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 25 and supply ducts 21 are coaxial and obtained by the same drilling operation; they therefore have an identical internal diameter.
  • the lubrication duct therefore comprises a nozzle 30 to reduce the flow of oil. 'oil.
  • the nozzle 30 is formed by a narrow orifice 28 of reduced section passing radially through an annular ring 27. Said annular ring is inserted into the main ramp 20 and it is coaxial with said ramp.
  • the outside diameter of the annular ring 27 is slightly greater than the inside diameter of the main ramp to allow mounting by shrinking.
  • the annular ring 27 thus comprises a wide orifice 29 and the narrow orifice 28 passing 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 drops in the flow. of oil to the cylinder head.
  • the narrow orifice 28 is arranged opposite the outlet 26 of the lubrication duct 25 in the main rail 20 and it therefore has a different diameter and more particularly much smaller than the diameter of the lubrication duct 25 and of the wide orifice 29. Oil will thus be able to evacuate downwards and the cylinder head without disturbing the flow of oil for the lubrication of the cylinder head.
  • the annular ring 27 is part of a sealing plug 31 of the main ramp.
  • the sealing plug 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 35 made in the wall of the cylinder block.
  • the combination of the notch and the notch forms a poka-yoke and allows reliable assembly 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 facing the outlet 26 of the lubrication duct.
  • the sealing plug 31 is presented with the annular ring facing the outlet of the main ramp 20 by making the association of the notch 34 with the notch 35. The plug is then pushed 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 facing the outlet 26 of the lubrication duct.
  • the oil flow rates in each of the two conduits are therefore controlled.
  • the lubrication circuit comprises a branch directed towards the cylinder head and another branch towards the high pressure pump, the two branches are formed by conduits obtained by the same drilling operation passing through the main rail and the oil flow rates in each of the branches is regulated by means of a simple annular ring part of a sealing plug of the main rail 20.
  • the plug can have a blade extending axially 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)

Claims (10)

  1. Wärmekraftmotor eines Kraftfahrzeugs, der eine Kraftstoffhochdruckpumpe (20), die an einem zur Kupplungsseite (100) des Motors weisenden Längsende des Motors angeordnet ist und von einer fest an einer Kurbelwelle des Motor befestigten Nockenscheibe betätigt wird, und einen Schmierkreislauf (50) aufweist, der enthält:
    - eine Zufuhrleitung (21) von Öl zu einem Zylinderkopf, die in einem Zylindergehäuse (10) ausgehöhlt ist,
    - eine Schmierleitung (25) der Kraftstoffhochdruckpumpe (20),
    - eine längs verlaufende Hauptölgalerie (20) orthogonal zu den zwei Leitungen und in die die zwei Leitungen münden,
    dadurch gekennzeichnet, dass die Zufuhrleitung (21) sich im Wesentlichen parallel zur Kupplungsseite (100) in der Verlängerung der Schmierleitung (25) erstreckt, an einem Ende von der eine Düse (30) zur Reduzierung des Öldurchsatzes angeordnet ist.
  2. Wärmekraftmotor nach Anspruch 1, dadurch gekennzeichnet, dass die Zufuhrleitung (21) und die Schmierleitung (25) zylindrisch sind und den gleichen Innendurchmesser aufweisen.
  3. Wärmekraftmotor nach Anspruch 2, dadurch gekennzeichnet, dass die Zufuhrleitung (21) und die Schmierleitung (25) koaxial sind.
  4. Wärmekraftmotor nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Düse (30) von einem kreisförmigen Ring (27) gebildet wird, der radiale Öffnungen (28, 29) unterschiedlicher Durchmesser aufweist, koaxial mit der Hauptgalerie und ins Innere der Galerie eingeführt, um die Mündungen (22, 26) jeder der zwei Leitungen zu bedecken, indem er eine radiale Öffnung vor einer Mündung jeder der Zufuhr- (21) und Schmierleitungen (25) aufweist.
  5. Wärmekraftmotor nach Anspruch 4, dadurch gekennzeichnet, dass der Querschnitt der radialen Öffnung (28) gegenüber der Mündung (26) der Schmierleitung (25) kleiner ist als der Querschnitt der radialen Öffnung (29), die die Mündung (22) der Zufuhrleitung (21) in die Hauptgalerie (20) umgibt.
  6. Wärmekraftmotor nach einem der Ansprüche 4 oder 5, dadurch gekennzeichnet, dass der kreisförmige Ring (27) Teil eines Verschlussstopfens (31) eines Endes der Hauptgalerie (20) ist, das von der Kupplungsseite (100) mündet.
  7. Wärmekraftmotor nach Anspruch 6, dadurch gekennzeichnet, dass der Verschlussstopfen (31) eine Indexierungseinrichtung (34) aufweist.
  8. Wärmekraftmotor nach Anspruch 7, dadurch gekennzeichnet, dass die Indexierungseinrichtung eine radiale Raste (34) enthält, die sich von einer Umfangswand (33) des Stopfens erstreckt und in einem Einschnitt (35) aufgenommen wird, der in einer Wand des Zylindergehäuses (10) ausgehöhlt ist.
  9. Wärmekraftmotor nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass der Verschlussstopfen (31) am Kupplungsende der Hauptgalerie durch Aufschrumpfen montiert wird.
  10. Wärmekraftmotor nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die Zufuhrleitung (21) und die Schmierleitung (25) durch den gleichen Bohrvorgang erhalten werden.
EP18722095.9A 2017-04-14 2018-03-28 Ölkreislauf mit öldüse und durchgang Active EP3610150B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1753297A FR3065255B1 (fr) 2017-04-14 2017-04-14 Circuit d'huile avec passage et ajutage d'huile
PCT/FR2018/050752 WO2018189445A1 (fr) 2017-04-14 2018-03-28 Circuit d'huile avec passage et ajutage d'huile

Publications (2)

Publication Number Publication Date
EP3610150A1 EP3610150A1 (de) 2020-02-19
EP3610150B1 true EP3610150B1 (de) 2021-11-03

Family

ID=59031199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18722095.9A Active EP3610150B1 (de) 2017-04-14 2018-03-28 Ölkreislauf mit öldüse und durchgang

Country Status (4)

Country Link
EP (1) EP3610150B1 (de)
FR (1) FR3065255B1 (de)
RU (1) RU2739431C1 (de)
WO (1) WO2018189445A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113756976B (zh) * 2021-09-29 2022-07-15 广西玉柴机器股份有限公司 组合式气缸体

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2680387B1 (fr) * 1991-08-13 1993-10-01 Renault Regie Nale Usines Culasse pour moteur a combustion interne.
DE19627757A1 (de) * 1996-07-10 1998-01-15 Bosch Gmbh Robert Kraftstoffpumpe
JP2001073733A (ja) * 1999-08-31 2001-03-21 Fuji Heavy Ind Ltd 高圧燃料ポンプ駆動用カムの潤滑装置
DE102012216594A1 (de) * 2012-09-18 2014-03-20 Robert Bosch Gmbh Brennkraftmaschine mit einem Kurbelgehäuse
FR3011588A1 (fr) 2013-10-03 2015-04-10 Renault Sa Moteur diesel comportant une pompe de carburant integree
FR3013774B1 (fr) * 2013-11-22 2019-08-23 Renault S.A.S Pompe d'injection de carburant a lubrification integree a l'axe de rotation du galet

Also Published As

Publication number Publication date
FR3065255A1 (fr) 2018-10-19
RU2739431C1 (ru) 2020-12-24
EP3610150A1 (de) 2020-02-19
FR3065255B1 (fr) 2021-04-09
WO2018189445A1 (fr) 2018-10-18

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