GB955988A - Improvements in or relating to valve tappets of internal combustion engines - Google Patents

Improvements in or relating to valve tappets of internal combustion engines

Info

Publication number
GB955988A
GB955988A GB32324/60A GB3232460A GB955988A GB 955988 A GB955988 A GB 955988A GB 32324/60 A GB32324/60 A GB 32324/60A GB 3232460 A GB3232460 A GB 3232460A GB 955988 A GB955988 A GB 955988A
Authority
GB
United Kingdom
Prior art keywords
engine speed
assembly
valve
sept
engine
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
Application number
GB32324/60A
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
Priority to FR806243A priority Critical patent/FR1245669A/en
Priority to FR837078A priority patent/FR78295E/en
Application filed by Renault SAS, Regie Nationale des Usines Renault filed Critical Renault SAS
Publication of GB955988A publication Critical patent/GB955988A/en
Expired legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/12Transmitting gear between valve drive and valve
    • F01L1/14Tappets; Push rods
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/34Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift
    • F01L1/344Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear
    • F01L1/34409Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of means for changing the timing of the valves without changing the duration of opening and without affecting the magnitude of the valve lift changing the angular relationship between crankshaft and camshaft, e.g. using helicoidal gear by torque-responsive means

Abstract

955,988. Valve gear. REGIE NATIONALE DES USINES RENAULT. Sept. 20, 1960 [Sept. 26, 1959; Aug. 29, 1960], No. 32324/60. Heading F1B. In an I.C. engine valve operating mechanism, a rotatable cam 3 Fig. 1 engages a tappet 4 slidably mounted in a moveable assembly 106 which oscillates about a stationary axis parallel to the cam axis and a pair of spring blades 124, 1241, mounted on the assembly 106 is engaged by an eccentric 123 alternately during camshaft rotation, the arrangement being such that during low speed operation the moveable assembly is oscillated, the extent of oscillation decreasing with increasing engine speed whereby the valve timing is automatically modified so the engine speed varies, valve lead or lag present at high engine speed being reduced or eliminated as the engine speed reduces. Opposed spring- loaded pistons 13, 131, sliding in clylinders 15, 151 act on arm 9 and tend to urge assembly 106 into the equilibrium position. Each cylinder 15 or 151 communicates through a calibrated orifice 17 or 171 with ducts 16 or 161 fed with pressurized oil from the lubrication system, the restricted orifices 17, 171, causing a greater damping effect as the engine speed increases.
GB32324/60A 1959-09-26 1960-09-20 Improvements in or relating to valve tappets of internal combustion engines Expired GB955988A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR806243A FR1245669A (en) 1959-09-26 1959-09-26 Oscillating valve timing system for internal combustion engine
FR837078A FR78295E (en) 1959-09-26 1960-08-29 Oscillating valve timing system for internal combustion engine

Publications (1)

Publication Number Publication Date
GB955988A true GB955988A (en) 1964-04-22

Family

ID=26184444

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32324/60A Expired GB955988A (en) 1959-09-26 1960-09-20 Improvements in or relating to valve tappets of internal combustion engines

Country Status (3)

Country Link
FR (2) FR1245669A (en)
GB (1) GB955988A (en)
OA (1) OA1468A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4580533A (en) * 1983-03-24 1986-04-08 Mazda Motor Corporation Valve mechanism having variable valve timing
US4582029A (en) * 1982-09-10 1986-04-15 Mazda Motor Corporation Valve timing control system for internal combustion engine
US4651684A (en) * 1982-09-10 1987-03-24 Mazda Motor Corporation Valve timing control system for internal combustion engine
EP0292185A2 (en) * 1987-05-21 1988-11-23 Jaguar Cars Limited Cam mechanisms
US7380531B2 (en) 2005-04-01 2008-06-03 Schaeffler Kg Variable valve drive for changing the control timing of cam-actuated gas-exchange valves

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH066887B2 (en) * 1983-07-25 1994-01-26 マツダ株式会社 Engine valve timing controller

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4582029A (en) * 1982-09-10 1986-04-15 Mazda Motor Corporation Valve timing control system for internal combustion engine
US4651684A (en) * 1982-09-10 1987-03-24 Mazda Motor Corporation Valve timing control system for internal combustion engine
US4580533A (en) * 1983-03-24 1986-04-08 Mazda Motor Corporation Valve mechanism having variable valve timing
EP0292185A2 (en) * 1987-05-21 1988-11-23 Jaguar Cars Limited Cam mechanisms
EP0292185A3 (en) * 1987-05-21 1989-08-09 Jaguar Cars Limited Cam mechanisms
US4869215A (en) * 1987-05-21 1989-09-26 Jaguar Cars Limited Cam mechanisms
US7380531B2 (en) 2005-04-01 2008-06-03 Schaeffler Kg Variable valve drive for changing the control timing of cam-actuated gas-exchange valves

Also Published As

Publication number Publication date
FR78295E (en) 1962-06-29
OA01468A (en) 1969-07-21
FR1245669A (en) 1960-11-10
OA1468A (en) 1969-07-21

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