EP3379066B1 - Integration der antriebsnocke der hochdruckpumpe auf dem trägheitsschwungrad - Google Patents

Integration der antriebsnocke der hochdruckpumpe auf dem trägheitsschwungrad Download PDF

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Publication number
EP3379066B1
EP3379066B1 EP18160571.8A EP18160571A EP3379066B1 EP 3379066 B1 EP3379066 B1 EP 3379066B1 EP 18160571 A EP18160571 A EP 18160571A EP 3379066 B1 EP3379066 B1 EP 3379066B1
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EP
European Patent Office
Prior art keywords
cam
crankshaft
flywheel
arrangement
actuating cam
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
EP18160571.8A
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English (en)
French (fr)
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EP3379066A1 (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
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Renault SAS
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Application filed by Renault SAS filed Critical Renault SAS
Publication of EP3379066A1 publication Critical patent/EP3379066A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F02F7/0068—Adaptations for other accessories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0043—Arrangements of mechanical drive elements
    • F02F7/0046—Shape of casings adapted to facilitate fitting or dismantling of engine parts
    • 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
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams

Definitions

  • the present invention relates to the field of motor vehicles and relates to a high pressure fuel supply pump.
  • the invention relates more particularly to an arrangement of an activation cam for the high pressure pump, integral in rotation with a crankshaft movable in rotation inside an internal chamber of a heat engine of a motor vehicle.
  • 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. Fuel is supplied to the engine by a high pressure pump which replaces a carburetor and which is actuated by the rotation of the crankshaft.
  • the document FR2 984 965 - A1 proposes an arrangement of a fuel pump at one end of a camshaft, said pump has a sliding axis coaxial with the axis of the camshaft.
  • the document WO2013 / 160106 discloses an arrangement of a fuel pump at one end of a crankshaft facing a flywheel.
  • the document FR2997133 describes a flywheel comprising a tubular protuberance surrounding the end of a crankshaft facing said flywheel.
  • the object of the invention is to remedy these problems and one of the objects of the invention is a particular arrangement of the actuating cam of a high pressure fuel supply pump at one end of the crankshaft.
  • the object of the invention relates to an arrangement of an actuating cam for the fuel pump at one end of the crankshaft facing the flywheel of the engine while minimizing the size of the engine.
  • the object of the invention relates more particularly to an arrangement of a cam for actuating a fuel pump at one end of the crankshaft facing the flywheel of the engine according to claim 1.
  • the actuating cam is fixed integral in rotation with the flywheel which is itself fixed integral in rotation with the crankshaft.
  • the arrangement of said cam integral with the flywheel also allows a rotational connection of the cam with the crankshaft when said Flywheel is mounted at one end of the crankshaft in a space-saving location and therefore with minimal impact on the engine size.
  • the integral connection of the cam with the flywheel also allows a simplified assembly of the actuating cam.
  • the actuating cam carries an annular seal to control the size of the arrangement.
  • the following description can take into account three spatial axes which are the longitudinal direction X of the engine, the transverse direction Y coplanar with the longitudinal direction X along a horizontal plane of the vehicle passing for example through the axles of the wheels of the vehicle and a direction Z vertical directed towards the top of the vehicle.
  • the 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 opens 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 to the first end and connected with a flywheel and a gearbox (not shown).
  • a heat engine 10 or internal combustion of a motor vehicle comprises a cylinder block 11 comprising at least one cylinder 12 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 of a combustion chamber delimited by the wall 13 of the at least one cylinder, said piston and the cylinder head.
  • the piston is linked to a crankshaft 14 arranged along an axis X that is substantially horizontal and orthogonal to the vertical axis Z.
  • the reciprocating sliding movements of the piston cause a rotational movement of the crankshaft.
  • the sliding movements of the piston are not, however, carried out in a regular manner and produce acyclisms which have repercussions on the transmission elements connected to said engine 10 and particularly to the crankshaft.
  • a flywheel 15 is connected to the crankshaft driven by the pistons to absorb irregularities in engine torque and reduce acyclisms.
  • the flywheel 15 is arranged in a known manner fixed to the coupling end 16 of the crankshaft and connected with the gearbox.
  • the face of the motor facing the flywheel is referred to as the coupling face 17.
  • the invention relates to an arrangement of the high pressure fuel supply pump actuated by means of an actuating cam 20 disposed at the coupling end of the crankshaft facing a coupling face 17 of the engine and connected to it. a flywheel 15.
  • said fuel pump is arranged radially to the axis of the cam and comprises a piston bearing against the peripheral surface of said cam.
  • Said fuel feed pump is arranged according to the invention orthogonally to the X axis of the crankshaft and to the coupling end 17 'of said crankshaft 14.
  • the flywheel 15 carries the actuating cam 20, said cam is arranged opposite the crankshaft, that is to say that said cam is mounted fixed integral with the rotating flywheel. and in translation, on the side of said flywheel facing the crankshaft 14.
  • the figures 2 to 5 represent embodiments of the invention.
  • the shape of said cross section may however be different.
  • the actuating cam 20 has a substantially cylindrical longitudinal orifice 21 coaxial with the X axis of the cam which is adapted to surround the coupling end 17 'of the crankshaft. Said opening is extended along the X axis by a through orifice 22 which allows the passage of a fixing screw to secure the flywheel 15 with the crankshaft 14.
  • Said cam 20 is fixed integral with the flywheel 15.
  • said cam comprises threaded orifices obtained for example by drilling parallel to the cam axis X.
  • the flywheel also has through holes in vis-à-vis the threaded holes of the cam to allow fixing of the cam with the flywheel by means of fixing screws.
  • the flywheel 15 is fixed in a known manner to the coupling end 17 'of the crankshaft so that the cam 20 is turned towards the crankshaft 14.
  • the rotation of the crankshaft 14 then causes the rotation of the cam 20 which is suitable for actuating the piston of the fuel pump.
  • the cylinder block 11 comprises a wall 23 delimiting a reception chamber 24 for housing the actuation cam; said wall extends the cylinder block along the longitudinal axis X and it comprises a radial opening passing through (not shown) along a radial axis orthogonal to the longitudinal axis X for the passage of the substantially cylindrical body of the fuel pump.
  • Said reception chamber 24 is sealed by means of seals 25. Said seals are arranged on both sides along the longitudinal axis X of the actuating cam.
  • the flywheel 15 is mounted fixed integral with the coupling end 17 'of the crankshaft 14.
  • the longitudinal orifice 21 of the cam 20 surrounds the coupling end 17 'of the crankshaft 14 except for the mounting clearance.
  • the cam is fixed by threaded connections to the flywheel 14 or to a disc forming said flywheel.
  • the cam is mounted housed in the reception chamber 24.
  • the fuel pump can be fixed to the wall 23 of the cylinder block so that its axis is substantially orthogonal to the axis X of the crankshaft 14, the body of the cylinder. the pump passes through the radial opening made in the wall 23 of the reception chamber 24.
  • the flywheel has a tubular protuberance 29 which is mounted around the coupling end 17 'of the crankshaft.
  • Said protuberance 29 has a substantially cylindrical recess 30 complementary to the coupling end 17 'of the crankshaft except for the mounting clearance.
  • the protuberance carries the actuating cam 20 mounted in such a way that its axis of rotation coincides with the axis of the flywheel.
  • the cam is preferably mounted by hooping or by welding surrounding the tubular protuberance 29.
  • the actuating cam 20 and the tubular protrusion 29 are turned towards the crankshaft 14 such that the coupling end 17 'of the crankshaft is pressed into the recess 30 of said protuberance 29, the cam 20 then surrounds said coupling end 17 'of the crankshaft.
  • the flywheel 15 is fixed to the end of the crankshaft by means of the threaded connection.
  • the actuating cam 20 carried by the tubular protuberance 29 of the flywheel is housed directly in a chamber of connecting rods 34 in which are also housed at least one crank pin 31 and at least a journal 32 forming the crankshaft 19.
  • the retaining bearing 27 of the crankshaft in this case surrounds the tubular protuberance 29 of the flywheel 15.
  • the actuating cam 20 housed in the connecting rod chamber 34 then benefits from an oil mist invading said connecting rod chamber during of the operation of the engine, which can make it possible to avoid the creation of a duct for supplying lubricating liquid to the contact surface of the actuating cam 20 with the piston of the fuel pump.
  • the fuel pump arrangement according to the invention has little impact on the size of the heat engine.
  • the invention is not limited to the sole embodiments of this socket, described above by way of examples, it embraces on the contrary all the variants thereof.
  • the actuating cam can be integrated into the flywheel or part of said flywheel, without thereby departing from the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Claims (10)

  1. Anordnung eines Betätigungsnockens einer Kraftstoffpumpe an einem Kupplungsende (17') der Kurbelwelle (12), das dem Schwungrad eines Motors zugewandt ist, welcher umfasst:
    - ein Zylinderkurbelgehäuse (10), das eine Kurbelkammer (11) aufweist, die von einer Wand (15) begrenzt wird, die eine Öffnung (16) aufweist, welche das Ende (17') einer in dieser Kammer aufgenommenen Kurbelwelle (12) umgibt,
    - und das Schwungrad (20), das drehfest an dem Ende befestigt ist und außerhalb der Kammer angeordnet ist, wobei das Schwungrad (20) eine rohrförmige Ausstülpung (29) aufweist, die geeignet ist, das Ende (17') der Kurbelwelle zu umgeben, wobei die Ausstülpung (29) des Schwungrades über die kreisförmige Öffnung (16) ins Innere der Kammer (11) mündet,
    dadurch gekennzeichnet, dass der Betätigungsnocken von der rohrförmigen Ausstülpung (29) getragen wird und an dem Schwungrad befestigt ist.
  2. Anordnung nach Anspruch 1, dadurch gekennzeichnet, dass der Nocken so angebracht ist, dass er das Ende der Kurbelwelle umgibt.
  3. Anordnung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Nocken durch Aufschrumpfen oder Schweißen so angebracht ist, dass er die Ausstülpung umgibt.
  4. Anordnung eines Betätigungsnockens nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Betätigungsnocken von der Wand des Zylinderkurbelgehäuses umgeben ist.
  5. Anordnung eines Betätigungsnockens nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Zylinderkurbelgehäuse eine Aussparung aufweist, die radial zur Achse der Kurbelwelle durch eine Öffnung verlängert ist, um die Kraftstoffpumpe aufzunehmen.
  6. Anordnung eines Betätigungsnockens nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Nocken in der Kurbelkammer aufgenommen ist.
  7. Anordnung eines Betätigungsnockens nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Zylinderkurbelgehäuse eine Aufnahmekammer aufweist, die von der Kurbelkammer entlang der Längsachse des Zylinderkurbelgehäuse getrennt ist, um den Betätigungsnocken aufzunehmen.
  8. Anordnung eines Betätigungsnockens nach Anspruch 7, dadurch gekennzeichnet, dass die Aufnahmekammer durch Dichtringe dicht verschlossen ist.
  9. Anordnung eines Betätigungsnockens nach Anspruch 8, dadurch gekennzeichnet, dass der Nocken eine Dichtung trägt.
  10. Verbrennungsmotor eines Kraftfahrzeugs, welcher eine auf der Kupplungsseite angeordnete Kraftstoffpumpe umfasst, die von einem Betätigungsnocken betätigt wird, der nach einem der Ansprüche 1 bis 9 angeordnet ist.
EP18160571.8A 2017-03-13 2018-03-07 Integration der antriebsnocke der hochdruckpumpe auf dem trägheitsschwungrad Active EP3379066B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1752025A FR3063773B1 (fr) 2017-03-13 2017-03-13 Integration de la came d'entrainement de la pompe hp sur le volant d'inertie

Publications (2)

Publication Number Publication Date
EP3379066A1 EP3379066A1 (de) 2018-09-26
EP3379066B1 true EP3379066B1 (de) 2021-01-13

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Application Number Title Priority Date Filing Date
EP18160571.8A Active EP3379066B1 (de) 2017-03-13 2018-03-07 Integration der antriebsnocke der hochdruckpumpe auf dem trägheitsschwungrad

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EP (1) EP3379066B1 (de)
FR (1) FR3063773B1 (de)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010035287A1 (en) * 2008-09-29 2010-04-01 Tvs Motor Company Limited System for driving a fuel pump
GB201207235D0 (en) * 2012-04-25 2012-06-06 Delphi Tech Holding Sarl Fuel pump assembly
FR2997133B1 (fr) * 2012-10-24 2018-03-23 Renault S.A.S. Liaison vilebrequin - carter-cylindres
GB2540584A (en) * 2015-07-22 2017-01-25 Gm Global Tech Operations Llc Internal combustion engine comprising a fuel unit pump actuated by the crankshaft

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR3063773B1 (fr) 2021-11-12
FR3063773A1 (fr) 2018-09-14
EP3379066A1 (de) 2018-09-26

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