EP0115996B1 - Dispositif de commande à came, notamment pour soupapes de moteurs à combustion interne - Google Patents
Dispositif de commande à came, notamment pour soupapes de moteurs à combustion interne Download PDFInfo
- Publication number
- EP0115996B1 EP0115996B1 EP84400209A EP84400209A EP0115996B1 EP 0115996 B1 EP0115996 B1 EP 0115996B1 EP 84400209 A EP84400209 A EP 84400209A EP 84400209 A EP84400209 A EP 84400209A EP 0115996 B1 EP0115996 B1 EP 0115996B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- oil
- cam
- valve
- actuating arrangement
- arrangement 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.)
- Expired
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 11
- 239000003921 oil Substances 0.000 claims description 39
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000005461 lubrication Methods 0.000 claims description 9
- 239000011810 insulating material Substances 0.000 claims description 3
- 239000010687 lubricating oil Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims 1
- 101100165177 Caenorhabditis elegans bath-15 gene Proteins 0.000 description 6
- 230000005587 bubbling Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000006061 abrasive grain Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- KJFBVJALEQWJBS-XUXIUFHCSA-N maribavir Chemical compound CC(C)NC1=NC2=CC(Cl)=C(Cl)C=C2N1[C@H]1O[C@@H](CO)[C@H](O)[C@@H]1O KJFBVJALEQWJBS-XUXIUFHCSA-N 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 235000010603 pastilles Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
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 a high viscosity of 0.2 to 1 Poiseuille.
- 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.
- Figure 3 is a partial sectional view of Figure 2 along 3-3.
- 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 3 which opens towards the bottom of the bath 15 in a lower channel 10 4 .
- 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 rocker shaft 11. Simultaneously, the oil splashes 16 external to the oil bath 15 are sufficient to lubricate the contact surface between the valve 2 and the clearance adjusting screw 9.
- the coating 17 consisting either of an insulating material, for example plastic, or by an air knife taken in particular between two walls, makes it possible to maintain a sufficient viscosity of the oil in the hot bath. This thermal insulation limits the flow of heat which comes from the cylinder head 1 and heats the oil in the bath 15.
- the cooling fins 14 of the cylinder head cover 13 contribute to evacuating the heat flow produced by the friction of the distribution. .
- a highly viscous oil circulation with the independent upper bath 21 and supplied by the lower oil bath 31 serving as a reservoir, by means of the low pressure pump 32 allows ensuring the continuous lubrication of the sliding surfaces of the pushers 22 coming into contact with the cams 23 by the pads 38.
- the viscous oil of the bath 31 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 shaft with cams 24. This oil then feeds through holes 26 judiciously drilled in the cams 23, 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 oil consumption as much as possible 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)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8301676 | 1983-02-03 | ||
FR8301676A FR2540553A1 (fr) | 1983-02-03 | 1983-02-03 | Dispositif de commande a came, notamment pour soupapes de moteurs a combustion interne |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0115996A1 EP0115996A1 (fr) | 1984-08-15 |
EP0115996B1 true EP0115996B1 (fr) | 1986-11-12 |
Family
ID=9285564
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84400209A Expired EP0115996B1 (fr) | 1983-02-03 | 1984-01-31 | Dispositif de commande à came, notamment pour soupapes de moteurs à combustion interne |
Country Status (5)
Country | Link |
---|---|
US (1) | US4565168A (es) |
EP (1) | EP0115996B1 (es) |
DE (1) | DE3461322D1 (es) |
ES (1) | ES528469A0 (es) |
FR (1) | FR2540553A1 (es) |
Families Citing this family (12)
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 |
JPS61126007U (es) * | 1985-01-29 | 1986-08-07 | ||
US4856466A (en) * | 1988-09-28 | 1989-08-15 | Ford Motor Company | Lubricant retaining finger-follower rocker arm |
IT1232794B (it) * | 1989-09-19 | 1992-03-05 | Meccatec Spa | Macchina cucitrice di libri a filo refe. |
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 |
Family Cites Families (15)
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 |
US1469063A (en) * | 1920-11-12 | 1923-09-25 | Wills Childe Harold | Oil-feeding means |
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 |
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 | |
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 |
US3880128A (en) * | 1973-05-02 | 1975-04-29 | Ford Motor Co | Valve actuation mechanism including valve lash adjustment means |
IT1118658B (it) * | 1979-05-23 | 1986-03-03 | Fiat Veicoli Ind | Testa cilindri per motori ad accensione per compressione del tipo a precamera di combustione |
JPS5627015A (en) * | 1979-08-10 | 1981-03-16 | Nissan Motor Co Ltd | Diesel engine of light-oil lubrication type |
DE3126280C1 (de) * | 1981-07-03 | 1983-01-13 | Ford-Werke AG, 5000 Köln | Nockenwellenlagerung |
-
1983
- 1983-02-03 FR FR8301676A patent/FR2540553A1/fr active Granted
- 1983-12-28 ES ES528469A patent/ES528469A0/es active Granted
-
1984
- 1984-01-26 US US06/574,158 patent/US4565168A/en not_active Expired - Fee Related
- 1984-01-31 DE DE8484400209T patent/DE3461322D1/de not_active Expired
- 1984-01-31 EP EP84400209A patent/EP0115996B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2540553A1 (fr) | 1984-08-10 |
ES8407551A1 (es) | 1984-09-16 |
FR2540553B1 (es) | 1985-05-17 |
EP0115996A1 (fr) | 1984-08-15 |
DE3461322D1 (en) | 1987-01-02 |
US4565168A (en) | 1986-01-21 |
ES528469A0 (es) | 1984-09-16 |
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