GB1303528A - - Google Patents

Info

Publication number
GB1303528A
GB1303528A GB3174570A GB3174570A GB1303528A GB 1303528 A GB1303528 A GB 1303528A GB 3174570 A GB3174570 A GB 3174570A GB 3174570 A GB3174570 A GB 3174570A GB 1303528 A GB1303528 A GB 1303528A
Authority
GB
United Kingdom
Prior art keywords
shaft
cam
crank
chamber
oil pressure
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
GB3174570A
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 filed Critical
Publication of GB1303528A publication Critical patent/GB1303528A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0203—Variable control of intake and exhaust valves
    • F02D13/0215—Variable control of intake and exhaust valves changing the valve timing only
    • F02D13/0219—Variable control of intake and exhaust valves changing the valve timing only by shifting the phase, i.e. the opening periods of the valves are constant
    • 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
    • F01L1/3442—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 hydraulic chambers with variable volume to transmit the rotating force
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0223—Variable control of the intake valves only
    • F02D13/0234—Variable control of the intake valves only changing the valve timing only
    • F02D13/0238—Variable control of the intake valves only changing the valve timing only by shifting the phase, i.e. the opening periods of the valves are constant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0261—Controlling the valve overlap
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

1303528 I. C. engine valve gear ALFA ROMEO SpA 30 June 1970 [15 July 1969] 31745/70 Heading F1B A valve operating cam-shaft driven by the crank-shaft has means for varying the rotational position of the cam-shaft with respect to the crank-shaft comprising first and second members attached to the cam-shaft and crank-shaft respectively and capable of limited rotation with respect to one another, one of the members having a tangentially extending cylinder housing a plunger which engages a circumferentially facing surface of the other member and control means to admit or prevent the admission of pressure fluid to the cylinder. The intake camshaft 7, Fig. 1 is driven from a chain sprocket 9 through a ring 16 which has projection 17, Fig. 2 engaged in the spaces between projections 19 on a ring 18 which is keyed to the cam-shaft. When plungers 22 hold projections in the Fig. 2 position due to oil pressure in chamber 21 the cam-shaft has advanced phasing. When oil pressure is not present a spring 42 caused the arrangement to return to a delayed phasing position. Oil passes via duct 14, restriction 25 and ducts 26, 27, 28 to a non-return valve 29 and thence to chamber 21, the pressure also being communicated to chamber 31 which is closed by a cylinder 32 held stationary by an arm 33 which engages a screw 34. The system oil pressure is relieved through a hole 35 which is closable by a rotatable bush 36 which is actuable by a linkage connected to the accelerator pedal.
GB3174570A 1969-07-15 1970-06-30 Expired GB1303528A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT1967369 1969-07-15

Publications (1)

Publication Number Publication Date
GB1303528A true GB1303528A (en) 1973-01-17

Family

ID=11160279

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3174570A Expired GB1303528A (en) 1969-07-15 1970-06-30

Country Status (3)

Country Link
DE (1) DE2032581A1 (en)
FR (1) FR2055094A5 (en)
GB (1) GB1303528A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157364A (en) * 1984-02-07 1985-10-23 Alan John Graham I.C. engine variable valve timing device
US5507254A (en) * 1989-01-13 1996-04-16 Melchior; Jean F. Variable phase coupling for the transmission of alternating torques
US5645017A (en) * 1989-01-13 1997-07-08 Melchior; Jean Frederic Coupling for the transmission of alternating torques

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1093715B (en) * 1978-03-24 1985-07-26 Alfa Romeo Spa TIMING VARIATOR OF THE DISTRIBUTION FOR INTERNAL COMBUSTION ALTERNATIVE ENGINE
DE3415861A1 (en) * 1984-04-28 1985-10-31 Pierburg Gmbh & Co Kg, 4040 Neuss DEVICE FOR CONTROLLING A COUPLING DEVICE
DE3419963A1 (en) * 1984-05-29 1985-12-05 Peter 7442 Neuffen Schüle FOUR-STROKE COMBUSTION ENGINE WITH A DEVICE FOR RECYCLING GAS FROM A EXHAUST PIPE TO THE COMBUSTION COMPARTMENT
GB2217812A (en) * 1988-04-30 1989-11-01 Ford Motor Co Variable camshaft phasing mechanism
DE3922962A1 (en) * 1989-07-12 1991-01-17 Audi Ag IC-engine camshaft angle adjuster - has camshaft vanes movable in chambers of timing wheel, the movement controlled by hydraulic pressure against action of spring
CN114729579B (en) * 2019-11-27 2024-03-12 比亚乔公司 Camshaft with phasing device for a multi-cylinder internal combustion engine with poppet valves

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157364A (en) * 1984-02-07 1985-10-23 Alan John Graham I.C. engine variable valve timing device
US5507254A (en) * 1989-01-13 1996-04-16 Melchior; Jean F. Variable phase coupling for the transmission of alternating torques
US5645017A (en) * 1989-01-13 1997-07-08 Melchior; Jean Frederic Coupling for the transmission of alternating torques
US5649506A (en) * 1989-01-13 1997-07-22 Melchior; Jean Frederic Coupling for the transmission of alternating torques

Also Published As

Publication number Publication date
DE2032581A1 (en) 1971-02-04
FR2055094A5 (en) 1971-05-07

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee