GB649192A - Improvements in or relating to valve actuating mechanisms for internal combustion engines - Google Patents

Improvements in or relating to valve actuating mechanisms for internal combustion engines

Info

Publication number
GB649192A
GB649192A GB357448A GB357448A GB649192A GB 649192 A GB649192 A GB 649192A GB 357448 A GB357448 A GB 357448A GB 357448 A GB357448 A GB 357448A GB 649192 A GB649192 A GB 649192A
Authority
GB
United Kingdom
Prior art keywords
shaft
cam
arms
links
angular velocity
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
GB357448A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB357448A priority Critical patent/GB649192A/en
Publication of GB649192A publication Critical patent/GB649192A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F01L1/34—Valve-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
    • F01L1/344—Valve-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
    • F01L1/352—Valve-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 using bevel or epicyclic gear
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05G—CONTROL DEVICES OR SYSTEMS INSOFAR AS CHARACTERISED BY MECHANICAL FEATURES ONLY
    • G05G7/00—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof
    • G05G7/12—Manually-actuated control mechanisms provided with one single controlling member co-operating with one single controlled member; Details thereof specially adapted for actuating a member on a system in motion with respect to the controlling member, e.g. on a rotating shaft

Abstract

649,192. Shaft couplings. EARL, C. C. Feb. 6, 1948, No. 3574. [Class 80(ii)] [Also in Group XXVII] A valve-actuating cam A is driven with cyclically varying angular velocity through a pin and slot connector, or a link, by a rotating driving member B on a shaft S which is parallel to the cam shaft but is shiftable along the line X-Y, or arc X'-Y', to vary the period of opening of' the valve. The shaft S is in line with the cam shaft at high engine speeds, the angular velocity of the cam being then constant. At lower speeds the shaft S is lowered relative to the cam shaft, preferably by a speed responsive governor acting through a servomotor. The angular velocity of the cam will then vary during each revolution, being greater than that of the member B, when the nose is upwards and acting on the tappet F, and less than that of the member B when it is downwards. Thus the valve opening period (in crankshaft degrees) is reduced. The member B is preferably mounted on a pivoted arm. As shown in Fig. 4, two driving members B, B<SP>1</SP> are driven by a common pinion G and carried by arms C, C' pivoted at E and connected by links H, H<SP>1</SP> to a sliding block V adjusted according to speed to adjust the position of the driving members B, B<SP>1</SP> relative to their cam shafts. In a modification the links H, H<SP>1</SP> are connected to an angularly adjustable pivoted arm. In a further modification the links H H' are omitted and the arms C, C' are pivoted on the axes of idler gears introduced between the gear G and the members B, B<SP>1</SP>, the ends of the arms C, C' being arc-shaped and provided with intermeshing teeth or connecting straps for simultaneous adjustment.
GB357448A 1948-02-06 1948-02-06 Improvements in or relating to valve actuating mechanisms for internal combustion engines Expired GB649192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB357448A GB649192A (en) 1948-02-06 1948-02-06 Improvements in or relating to valve actuating mechanisms for internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB357448A GB649192A (en) 1948-02-06 1948-02-06 Improvements in or relating to valve actuating mechanisms for internal combustion engines

Publications (1)

Publication Number Publication Date
GB649192A true GB649192A (en) 1951-01-24

Family

ID=9760904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB357448A Expired GB649192A (en) 1948-02-06 1948-02-06 Improvements in or relating to valve actuating mechanisms for internal combustion engines

Country Status (1)

Country Link
GB (1) GB649192A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029911A1 (en) * 1969-06-27 1971-01-07 Associated Engineering Ltd , Lea mington Spa, Warwickshire (Großbritannien) Device for driving a cam in relation to its drive shaft
DE2715431A1 (en) * 1976-04-02 1977-10-13 Stephen William Mitchell DEVICE FOR CONTROLLING VALVE SETTINGS IN ENGINES WITH INTERNAL COMBUSTION
US4505235A (en) * 1980-01-02 1985-03-19 National Research Development Corporation Valve timing mechanisms of internal combustion engines
FR2569226A1 (en) * 1984-08-16 1986-02-21 Deliaval Jean Luc Method and device for modifying a motion law, such as a valve-lifting law
US4603663A (en) * 1983-11-01 1986-08-05 Joseph Giocastro Rockerarm system for controlling valves in an internal combustion engine
US4694789A (en) * 1984-11-09 1987-09-22 Ford Motor Company Variable valve timing
GB2209061A (en) * 1987-08-25 1989-04-26 Jaguar Cars Cam mechanism

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029911A1 (en) * 1969-06-27 1971-01-07 Associated Engineering Ltd , Lea mington Spa, Warwickshire (Großbritannien) Device for driving a cam in relation to its drive shaft
DE2715431A1 (en) * 1976-04-02 1977-10-13 Stephen William Mitchell DEVICE FOR CONTROLLING VALVE SETTINGS IN ENGINES WITH INTERNAL COMBUSTION
USRE31917E (en) * 1976-04-02 1985-06-18 Valve timing mechanisms
US4505235A (en) * 1980-01-02 1985-03-19 National Research Development Corporation Valve timing mechanisms of internal combustion engines
US4603663A (en) * 1983-11-01 1986-08-05 Joseph Giocastro Rockerarm system for controlling valves in an internal combustion engine
FR2569226A1 (en) * 1984-08-16 1986-02-21 Deliaval Jean Luc Method and device for modifying a motion law, such as a valve-lifting law
US4694789A (en) * 1984-11-09 1987-09-22 Ford Motor Company Variable valve timing
GB2209061A (en) * 1987-08-25 1989-04-26 Jaguar Cars Cam mechanism
US4870872A (en) * 1987-08-25 1989-10-03 Jaguar Cars Limited Cam mechanisms
GB2209061B (en) * 1987-08-25 1991-06-05 Jaguar Cars Cam mechanisms

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