EP0115996A1 - Nockenantrieb insbesondere für Ventile von Brennkraftmaschinen - Google Patents

Nockenantrieb insbesondere für Ventile von Brennkraftmaschinen Download PDF

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Publication number
EP0115996A1
EP0115996A1 EP84400209A EP84400209A EP0115996A1 EP 0115996 A1 EP0115996 A1 EP 0115996A1 EP 84400209 A EP84400209 A EP 84400209A EP 84400209 A EP84400209 A EP 84400209A EP 0115996 A1 EP0115996 A1 EP 0115996A1
Authority
EP
European Patent Office
Prior art keywords
valve control
control device
valve
cam
oil bath
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
Application number
EP84400209A
Other languages
English (en)
French (fr)
Other versions
EP0115996B1 (de
Inventor
Jean-Pierre Rivere
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
Regie Nationale des Usines Renault
Original Assignee
Renault SAS
Regie Nationale des Usines Renault
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 Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Publication of EP0115996A1 publication Critical patent/EP0115996A1/de
Application granted granted Critical
Publication of EP0115996B1 publication Critical patent/EP0115996B1/de
Expired 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
    • 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
    • F01M9/106—Oil reservoirs
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/11—Thermal or acoustic insulation
    • 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
    • F01L2810/00—Arrangements solving specific problems in relation with valve gears
    • F01L2810/02—Lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/20—SOHC [Single overhead camshaft]
    • 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
    • F02F7/006—Camshaft or pushrod housings

Definitions

  • the present invention relates to a valve control device, in particular in an overhead camshaft engine, of the type comprising a rotary cam and transmission means cooperating with this cam to communicate to a valve, an alternating movement of lifted, against the force exerted by a return spring ensuring the fallout of the valve.
  • the dispensing valves are commonly controlled either directly by a cam via a pusher, or by a rocker, itself controlled by a cam or by a rod.
  • An essential aim of the present invention consists in overcoming the aforementioned drawbacks by a particular arrangement of the valve control members for an internal combustion engine.
  • the object of the invention is a valve control device of the aforementioned type in which, according to a feature of the invention, the sliding surface of the transmission means coming into contact with the cam remains immersed in an oil bath independent lubrication with high viscosity
  • This arrangement allows separate lubrication of the valve control device by bubbling in viscous oil.
  • a double condition of cleanliness and reduction of friction can thus be ensured because the high viscosities favor the formation of an oil film between the cam and the transmission means such as a rocker arm and a pusher.
  • valve control device also makes it possible not to lose a gain in friction by the use of an auxiliary oil pump of high performance.
  • the aforementioned transmission means consist of a rocker arm pivoting in its middle on a rocker shaft and provided around its pivot axis with grooves which open into the independent oil bath.
  • the rocker shaft can thus be permanently lubricated by bubbling.
  • the aforementioned transmission means consist of a pusher immersed in a bath of upper viscous oil. It is a variant for a direct valve attack which allows the above advantages to be preserved.
  • valves 2 In a cylinder head 1 of an internal combustion engine represented in FIG. 1, are essentially associated in a manner known per se, valves 2, housings 3 of spark plugs, a coolant 4, valve guides 5 provided with seals 6, return springs 7, cups 8, screws 9 for adjusting the play, rocker arms 10 mounted on rocker shafts 11, control cams 12.
  • a cylinder head cover 13 provided with cooling fins 14 covers this cylinder head 1 which contains a viscous oil bath 15 for lubrication thermally insulated from this cylinder head by a coating 17.
  • the rocker arms 10 each have a lower part 10 provided with a shoe 10 2 and embedded in the oil bath 15; each of these rockers pivots in its middle on a shaft 11 and has around its pivot axis, a circular groove 10 which opens towards the bottom of the bath 15 in a lower channel 10 40
  • a variant shown in Figures 2 and 3 relates to an overhead valve control by overhead camshaft with direct valve attacks.
  • the cam nose 12 1 projects oil by centrifugation into the groove 10 3 of the rocker arm 10 via the lower channel 10 4 and thus makes it possible to continuously lubricate the shaft 11 of the rocker arm Simultaneously, the projections of oil 1 6 external to the oil bath 1 5 are sufficient to lubricate the contact surface between the valve 2 and the screw 9 for adjusting the clearance.
  • the coating 1 7 constituted either by an insulating material, for example plastic, or by a blade of air taken in particular between two walls, makes it possible to maintain a sufficient viscosity of the oil of the bath 1 5 when hot. This thermal insulation limits the heat flow which comes from the cylinder head 1 and heats the oil of the bath 1 5.
  • the cooling fins 1 4 of the cylinder head cover 13 contribute to evacuating the heat flow produced by the friction of the distribution.
  • the temperature rise of the lubricating oil is thus effectively limited.
  • the viscous oil of the bath 3 1 rises successively through the channel 30, the groove 28 and the hole 27 in the oil ramp formed by the internal bore 25 of the camshaft 24. This oil then feeds through holes 26 judiciously drilled in the cams 2 3, the upper oil bath 21 before the pushers 22 attack by the sides of these cams. The viscous oil may then fall back into the lower bath 31 serving as a reservoir for closing the lubrication circuit of the distribution.
  • the seals 39 mounted on the valve guides 36 limit at best the consumption of oil and a thermally insulating material can separate the oil baths 21 and 31 from the cylinder head 20.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
  • Valve Device For Special Equipments (AREA)
EP84400209A 1983-02-03 1984-01-31 Nockenantrieb insbesondere für Ventile von Brennkraftmaschinen Expired EP0115996B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8301676A FR2540553A1 (fr) 1983-02-03 1983-02-03 Dispositif de commande a came, notamment pour soupapes de moteurs a combustion interne
FR8301676 1983-02-03

Publications (2)

Publication Number Publication Date
EP0115996A1 true EP0115996A1 (de) 1984-08-15
EP0115996B1 EP0115996B1 (de) 1986-11-12

Family

ID=9285564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400209A Expired EP0115996B1 (de) 1983-02-03 1984-01-31 Nockenantrieb insbesondere für Ventile von Brennkraftmaschinen

Country Status (5)

Country Link
US (1) US4565168A (de)
EP (1) EP0115996B1 (de)
DE (1) DE3461322D1 (de)
ES (1) ES528469A0 (de)
FR (1) FR2540553A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777842A (en) * 1985-01-29 1988-10-18 Toyota Jidosha Kabushiki Kaisha Structure of camshaft bearing
EP0418513A2 (de) * 1989-09-19 1991-03-27 MECCANOTECNICA S.p.A. Fadenbuchheftmaschine

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4711203A (en) * 1984-10-29 1987-12-08 Bayerische Motoren Werke Ag Timing case for a cylinder head of internal combustion engines having gas changing valves arranged essentially in parallel to one another
US4856466A (en) * 1988-09-28 1989-08-15 Ford Motor Company Lubricant retaining finger-follower rocker arm
US4991549A (en) * 1989-12-08 1991-02-12 Yamaha Hatsudoki Kabushiki Kaisha Camshaft lubricating system for engine
FR2683262B1 (fr) * 1991-11-06 1995-02-03 Smh Management Services Ag Moteur a combustion interne avec pompe a huile sur l'arbre a cames.
US5778841A (en) * 1997-02-26 1998-07-14 Cummins Engine Company, Inc. Camshaft for internal combustion engines
US6782856B2 (en) 2002-04-09 2004-08-31 Ford Global Technologies, Llc Camshaft accumulator
FR2848276B1 (fr) * 2002-12-05 2005-02-11 Renault Sa Dispositif d'accouplement d'un organe rotatif a un arbre a cames
DE102006043090A1 (de) * 2006-09-14 2008-03-27 Robert Bosch Gmbh Nockenwellentrieb, insbesondere für eine Dieseleinspritzpumpe, mit einer hubbeweglich angetriebenen Laufrolle
US20130301963A1 (en) * 2012-05-11 2013-11-14 GM Global Technology Operations LLC Automotive powertrain component and bearing with micropores, and method thereof
DE102012222752A1 (de) 2012-12-11 2014-06-12 Mahle International Gmbh Lageranordnung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1469063A (en) * 1920-11-12 1923-09-25 Wills Childe Harold Oil-feeding means
FR602018A (fr) * 1924-11-17 1926-03-11 Dispositif de graissage pour distributions de moteurs à soupapes en tête
FR621244A (fr) * 1926-09-10 1927-05-07 Lubrification de la commande des soupape des moteurs à combustion commandés par en haut
DE2415829A1 (de) * 1973-05-02 1974-11-21 Ford Werke Ag Oben-gesteuerte ventilbetaetigungseinrichtung fuer eine verbrennungskraftmaschine
FR2457388A1 (fr) * 1979-05-23 1980-12-19 Fiat Veicoli Ind Culasse pour moteurs a combustion interne a allumage par compression
FR2508995A1 (fr) * 1981-07-03 1983-01-07 Ford France Support pour arbres a cames et procede de montage de l'arbre dans ce support

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1264494A (en) * 1917-03-28 1918-04-30 Theodore Livinus Reepmaker D Orville Lubricating system for internal-combustion engines.
US1403540A (en) * 1918-03-22 1922-01-17 Packard Motor Car Co Hydrocarbon motor
US1469155A (en) * 1922-01-31 1923-09-25 Hedberg Roy Edgar Valve rocker arm
US1617845A (en) * 1922-05-13 1927-02-15 Elbert J Hall Lubricating and cooling system for internal-combustion engines
US1993992A (en) * 1932-11-21 1935-03-12 Ford Motor Co Internal combustion engine
US3045656A (en) * 1959-08-21 1962-07-24 Renault Engine valve operation
US3605706A (en) * 1969-12-12 1971-09-20 Microdot Inc Valve stem oil deflector
US3788295A (en) * 1972-12-11 1974-01-29 Ford Motor Co Valve stem oil seal and lubricator
JPS5627015A (en) * 1979-08-10 1981-03-16 Nissan Motor Co Ltd Diesel engine of light-oil lubrication type

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1469063A (en) * 1920-11-12 1923-09-25 Wills Childe Harold Oil-feeding means
FR602018A (fr) * 1924-11-17 1926-03-11 Dispositif de graissage pour distributions de moteurs à soupapes en tête
FR621244A (fr) * 1926-09-10 1927-05-07 Lubrification de la commande des soupape des moteurs à combustion commandés par en haut
DE2415829A1 (de) * 1973-05-02 1974-11-21 Ford Werke Ag Oben-gesteuerte ventilbetaetigungseinrichtung fuer eine verbrennungskraftmaschine
FR2457388A1 (fr) * 1979-05-23 1980-12-19 Fiat Veicoli Ind Culasse pour moteurs a combustion interne a allumage par compression
FR2508995A1 (fr) * 1981-07-03 1983-01-07 Ford France Support pour arbres a cames et procede de montage de l'arbre dans ce support

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
WOLF-DIETER FRANKE: "Schmierstoffe und ihre Anwendung", 1971, Carl Hanser Verlag, München, DE *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4777842A (en) * 1985-01-29 1988-10-18 Toyota Jidosha Kabushiki Kaisha Structure of camshaft bearing
EP0418513A2 (de) * 1989-09-19 1991-03-27 MECCANOTECNICA S.p.A. Fadenbuchheftmaschine
EP0418513A3 (en) * 1989-09-19 1991-06-19 Meccanotecnica S.P.A. A booksewing thread stitcher machine

Also Published As

Publication number Publication date
FR2540553B1 (de) 1985-05-17
US4565168A (en) 1986-01-21
DE3461322D1 (en) 1987-01-02
EP0115996B1 (de) 1986-11-12
ES8407551A1 (es) 1984-09-16
ES528469A0 (es) 1984-09-16
FR2540553A1 (fr) 1984-08-10

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