EP0463900B1 - Schmierungssystem für die Kontaktfläche von einer Nockenwelle und einem hydraulischen Stössel einer Brennkraftmaschine - Google Patents

Schmierungssystem für die Kontaktfläche von einer Nockenwelle und einem hydraulischen Stössel einer Brennkraftmaschine Download PDF

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Publication number
EP0463900B1
EP0463900B1 EP19910401441 EP91401441A EP0463900B1 EP 0463900 B1 EP0463900 B1 EP 0463900B1 EP 19910401441 EP19910401441 EP 19910401441 EP 91401441 A EP91401441 A EP 91401441A EP 0463900 B1 EP0463900 B1 EP 0463900B1
Authority
EP
European Patent Office
Prior art keywords
chamber
casing
tappet
camshaft
hydraulic
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.)
Expired - Lifetime
Application number
EP19910401441
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English (en)
French (fr)
Other versions
EP0463900A1 (de
Inventor
Jacques Doré
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
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 Automobiles Peugeot SA, Automobiles Citroen SA filed Critical Automobiles Peugeot SA
Publication of EP0463900A1 publication Critical patent/EP0463900A1/de
Application granted granted Critical
Publication of EP0463900B1 publication Critical patent/EP0463900B1/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
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases
    • F02F7/006—Camshaft or pushrod housings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/245—Hydraulic tappets
    • F01L1/25—Hydraulic tappets between cam and valve stem
    • 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
    • F01M9/00—Lubrication means having pertinent characteristics not provided for in, or of interest apart from, groups F01M1/00 - F01M7/00
    • F01M9/10—Lubrication of valve gear or auxiliaries
    • F01M9/101—Lubrication of valve gear or auxiliaries of cam surfaces

Definitions

  • the present invention relates to a system for lubricating the surfaces in contact with a camshaft and a hydraulic tappet for an internal combustion engine according to FR-A-2 006 542.
  • These pushers generally comprise a jacket comprising a first hydraulic compression chamber for adjusting the clearance of a corresponding valve, this chamber being supplied from a source of fluid through a first orifice formed in the side wall of the jacket, when the pusher is in the high position.
  • the object of the invention is therefore to solve these problems by proposing a lubrication system for surfaces in contact with the camshaft and the hydraulic valve which is simple, reliable and which avoids any machining or addition of additional parts in the cylinder head.
  • the subject of the invention is a system for lubricating the surfaces in contact with a camshaft and a hydraulic tappet for an internal combustion engine, in which the tappet comprises a jacket comprising a first hydraulic compression chamber for adjusting the clearance of a corresponding valve, supplied from a source of fluid through at least one first orifice formed in the side wall of the jacket, when the pusher is in the high position, characterized in that the jacket comprises a second hydraulic chamber, above the first, at least one second orifice opening into the second chamber, formed in its side wall above the first, at a distance corresponding to the stroke of the pusher, so that the second chamber is supplied from the source when the pusher is in the low position, and at least a third orifice formed in its upper wall, opening on the one hand in the second chamber and on the other hand near the surfaces in contact with the camshaft and the tappet to lubricate them.
  • the hydraulic tappets 2 of the prior art have a jacket 8 and a piston assembly 9 used to adjust the clearance of a corresponding valve.
  • This fluid is introduced into this chamber by means of an annular groove 12 formed in the external surface of the side wall of the jacket, and of an orifice 13 opening on the one hand into the chamber 11 and on the other hand into the groove 12, from the feed channel 5 described with reference to FIG. 1.
  • An orifice 14 ( Figure 1), one end of which opens into this channel 5, is also provided in the cylinder head, to supply this chamber with fluid when the pusher is in the high position.
  • FIG. 3 is a sectional view of a pusher used in the constitution of a lubrication system according to the invention, we see that it has the same elements as those described in look of Figure 2 namely a jacket 15, a piston assembly 16, a first annular spacer 17 between the side wall of the jacket and the piston assembly, a first orifice 18 opening into a first annular groove 19 for the supply of a first chamber 20 of fluid necessary for the operation of the piston assembly.
  • the jacket 15 comprises a second hydraulic chamber 21 formed above the first.
  • the first and second hydraulic chambers of this jacket are separated by an annular spacer 22 one end of which is fixed to the interior surface of the side wall of the jacket 15 and the other to the interior surface of the top wall of this jacket.
  • This jacket also includes at least a second orifice 23 opening into this second chamber 21, this orifice being formed in the side wall of the shirt, above the first orifice 18 at a distance corresponding to the stroke of the pusher so that the second chamber 21 is supplied from the source 5 when the pusher is in the low position, as will be described in more detail below.
  • This orifice also opens into an annular groove 24 parallel to the groove 19 described above.
  • the jacket also comprises at least a third calibrated orifice 25 formed in its upper wall, this orifice opening on the one hand into the second chamber 21 and on the other hand near the surfaces in contact with the camshaft and the tappet to lubricate them.
  • the annular spacers 17 and 22 can be fixed in any suitable manner in the jacket, for example by crimping or welding by electronic bombardment.
  • This orifice 25 can be determined to precisely direct a certain amount of fluid on the facing surfaces to obtain optimal lubrication.
  • the annular groove 24 may have several orifices spaced around its periphery to improve the filling of the second chamber.
  • several orifices oriented differently may be provided in the upper wall of the pusher to ensure the simultaneous lubrication of several elements, for example in the case of engines having twin camshafts or valve controls by combined cam / latch devices.

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)
  • Valve-Gear Or Valve Arrangements (AREA)

Claims (4)

  1. Schmierungssystem für die Kontaktflächen einer Nockenwelle und eines hydraulischen Stößels einer Brennkraftmaschine, bei dem der Stößel (2) eine Hülse (15) mit einer ersten hydraulischen Druckkammer (20) zur Einstellung des Spiels eines entsprechenden Ventils aufweist, die über wenigstens eine erste in der Seitenwand der Hülse (15) ausgebildete Öffnung (18) aus einer Fluidquelle (5) versorgt wird, wenn sich der Stößel in angehobener Position befindet, dadurch gekennzeichnet, daß die Hülse (15) eine zweite Hydraulikkammer (21) oberhalb der ersteren, wenigstens eine zweite Öffnung (23), die in die zweite Kammer (21) mündet und in der Seitenwand derselben oberhalb der ersten Öffnung in einem dem Hub des Stößels entsprechenden Abstand angeordnet ist, so daß die zweite Kammer (21) aus der Quelle (5) versorgt wird, wenn sich der Stößel in abgesenkter Position befindet, und wenigstens eine dritte Öffnung (25) aufweist, die in der oberen Wand des Stößels ausgebildet ist und einerseits in die zweite Kammer (21) und andererseits in der Nähe der zu schmierendern Kontakflächen der Nockenwelle und des Stößels mündet.
  2. Schmierungssystem nach Anspruch 1, dadurchgekennzeichnet, daß die zweite Öffnung (23) in eine in der äußeren Oberfläche der Seitenwand der Hülse (15) ausgebildete ringförmige Nut (24) mündet.
  3. Schmierungssystem nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die ersten und zweiten Kammern (20,21) der Hülse (15) durch eine ringförmige Abstandshülse (22) getrennt sind, deren eines Ende an der inneren Oberfläche der Seitenwand der Hülse (15) befestigt ist und deren anderes Ende an der inneren Oberfläche der oberen Wand der Hülse befestigt ist.
  4. Schmierungssystem nach einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß in der oberen Wand der Hülse mehrere unterschiedlich gerichtete Öffnungen ausgebildet sind.
EP19910401441 1990-06-22 1991-06-03 Schmierungssystem für die Kontaktfläche von einer Nockenwelle und einem hydraulischen Stössel einer Brennkraftmaschine Expired - Lifetime EP0463900B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9007858A FR2663683B1 (fr) 1990-06-22 1990-06-22 Systeme de lubrification des surfaces en contact d'un arbre a cames et d'un poussoir hydraulique pour un moteur a combustion interne.
FR9007858 1990-06-22

Publications (2)

Publication Number Publication Date
EP0463900A1 EP0463900A1 (de) 1992-01-02
EP0463900B1 true EP0463900B1 (de) 1993-09-29

Family

ID=9397913

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910401441 Expired - Lifetime EP0463900B1 (de) 1990-06-22 1991-06-03 Schmierungssystem für die Kontaktfläche von einer Nockenwelle und einem hydraulischen Stössel einer Brennkraftmaschine

Country Status (3)

Country Link
EP (1) EP0463900B1 (de)
DE (1) DE69100427T2 (de)
FR (1) FR2663683B1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2826403B1 (fr) * 2001-06-21 2003-10-17 Peugeot Citroen Automobiles Sa Poussoir de soupape pour moteur a combustion interne, comprenant un dispositif ameliore de lubrification, et moteur equipe d'un tel poussoir de soupape

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3380440A (en) * 1967-06-05 1968-04-30 Niel C. Thuesen Oil-damped valve-seating compensator
FR2006542A1 (de) * 1968-04-19 1969-12-26 Motomak
JPS6019903A (ja) * 1983-07-14 1985-02-01 Toyota Motor Corp 内燃機関用動弁装置
DE3412175A1 (de) * 1984-03-31 1985-10-10 Motomak Motorenbau, Maschinen- u. Werkzeugfabrik, Konstruktionen GmbH, 8070 Ingolstadt Tassenfoermiges gehaeuse eines sich selbsttaetig hydraulisch einstellenden ventilstoessels fuer brennkraftmaschinen mit obenliegender nockenwelle
DE3603938A1 (de) * 1986-02-07 1987-08-13 Bayerische Motoren Werke Ag Vom zylinderkopf einer brennkraftmaschine gesondert ausgebildetes steuergehaeuse

Also Published As

Publication number Publication date
EP0463900A1 (de) 1992-01-02
FR2663683A1 (fr) 1991-12-27
FR2663683B1 (fr) 1992-10-09
DE69100427T2 (de) 1994-02-17
DE69100427D1 (de) 1993-11-04

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