GB1299673A - Improvements relating to valve actuating mechanisms for internal combustion engines - Google Patents

Improvements relating to valve actuating mechanisms for internal combustion engines

Info

Publication number
GB1299673A
GB1299673A GB4369/70A GB436970A GB1299673A GB 1299673 A GB1299673 A GB 1299673A GB 4369/70 A GB4369/70 A GB 4369/70A GB 436970 A GB436970 A GB 436970A GB 1299673 A GB1299673 A GB 1299673A
Authority
GB
United Kingdom
Prior art keywords
shaft
valve
rocker
axis
piston
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
GB4369/70A
Inventor
Giovanni Torazza
Dante Giacosa
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.)
Fiat SpA
Original Assignee
Fiat SpA
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 Fiat SpA filed Critical Fiat SpA
Publication of GB1299673A publication Critical patent/GB1299673A/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
    • F02D13/0207—Variable control of intake and exhaust valves changing valve lift or valve lift and timing
    • F02D13/0211—Variable control of intake and exhaust valves changing valve lift or valve lift and timing the change of valve timing is caused by the change in valve lift, i.e. both valve lift and timing are functionally related
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • 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
    • 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
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0021—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio
    • 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
    • F01L2820/00—Details on specific features characterising valve gear arrangements
    • F01L2820/03—Auxiliary actuators
    • F01L2820/035—Centrifugal forces
    • 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

1299673 I. C. engine valve gear FIAT SpA 29 Jan 1970 [13 Feb 1969] 4369/70 Heading F1B [Also in Division F2] In a valve operating mechanism including a rocker 17 operated from a rotary shaft 12 and having a cam surface 18 formed of a section 20 concentric with the rocker axis and a valve lift section 21, the cam surface acts on a rocking member 23 and the valve lift opening period and timing are conjointly adjustable. In the embodiment shown, the rocker 17 is operated by an eccentric 13 on the shaft 12 through a connecting rod 15 and the shaft 24 of the member 23 is angularly adjustable about the rocker shaft 19 by lubricating oil under pressure supplied to a cylinder 27 in a member 26 supporting the shaft 24. The cylinder 27 contains a piston 28 reacting against a fixed surface 30 in the engine cylinder head 11'. A valve 34 in the oil supply line 32a to the cylinder 27 is controlled by a centrifugal governor 37, which also controls the valve inlet pressure, and a capsule 38 which is subject to the engine intake manifold vacuum. The radius of curvature of the valve stem operating surface 25 of the member 23 may be on the axis of the shaft 19 when the valve is closed or displaced therefrom to provide for variation in clearanel in the mechanism with adjustment of valve lift. In this embodiment separate shafts 12 are provided for the inlet and exhaust valves, Fig.1 (not shown). In a further embodiment, Figs.5 and 6 (not shown), a rotary shaft 12 in the engine cylinder block 1 operates overhead inlet and exhaust valves through respective eccentrics 13, connecting rods 15 and rockers 17. The shafts 24 of the members 23 are mounted in respective arms (47) pivoted at one end on the respective rocker shaft 19 and having at the other ends nose portions (48) which contact respective downwardly sloping top faces (54, 55) on a piston (50) of an hydraulic actuator (51). In another embodiment, Fig.8 (not shown), the eccentrics 13 are coupled to the rockers 17 by respective pairs of connecting rods (15,62). The pairs of rods are connected by respective bellcrank levers (58) mounted on a shaft (59) coupled by an arm (64) to one of the rocker shafts 19. The bell-crank lever shaft (59) is adjustable by a piston hydraulic actuator. In a final embodiment, Fig.9 (not shown), the inclined in-line inlet and exhaust valves are actuated from a respective eccentric 13 connecting rod 15, rocker 17 and a member 23 having one end contacting the valve stem and the other end co-operating with the cam surface 18. 'The rocker shaft 19 is mounted in an arm (69), pivotally mounted on a shaft (70), for angular adjustment by an hydraulic piston actuator. The end of the member 23 co-operating with the cam surface 18 has an arcuate surface (66) with its axis of curvature on the axis of the shaft (70) of the arm (69) mounting the rocker shaft 19 when the valve is closed.
GB4369/70A 1969-02-13 1970-01-29 Improvements relating to valve actuating mechanisms for internal combustion engines Expired GB1299673A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT5058169 1969-02-13

Publications (1)

Publication Number Publication Date
GB1299673A true GB1299673A (en) 1972-12-13

Family

ID=11273318

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4369/70A Expired GB1299673A (en) 1969-02-13 1970-01-29 Improvements relating to valve actuating mechanisms for internal combustion engines

Country Status (5)

Country Link
US (1) US3641988A (en)
DE (2) DE2006618A1 (en)
ES (1) ES376448A1 (en)
FR (1) FR2032705A5 (en)
GB (1) GB1299673A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987007323A1 (en) * 1986-05-21 1987-12-03 Bennett Automotive Technology Pty. Ltd. Engines for use with gaseous fuels
AU593665B2 (en) * 1986-05-21 1990-02-15 Bennett Automotive Technology Pty. Ltd. Engines for use with gaseous fuels

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US3786792A (en) * 1971-05-28 1974-01-22 Mack Trucks Variable valve timing system
DE2363891A1 (en) * 1973-07-13 1975-06-26 Daimler Benz Ag Valve control system for ic engine - valve rod is controlled by action of lever on adjustable curved surface
US4336775A (en) * 1975-12-12 1982-06-29 Eaton Corporation Valve selector
US4200081A (en) * 1975-12-15 1980-04-29 Eaton Corporation Valve selector
DE2753197A1 (en) * 1976-12-15 1978-06-22 Eaton Corp VALVE CONTROL DEVICE
DE2710189A1 (en) * 1977-03-09 1978-09-14 Daimler Benz Ag COMBUSTION MACHINE WITH INTERNAL COMBUSTION
US4203397A (en) * 1978-06-14 1980-05-20 Eaton Corporation Engine valve control mechanism
FR2472078A1 (en) * 1979-12-21 1981-06-26 Baguena Michel Four stroke engine valve drive - has roller controlling valve timing reciprocated between concave surface and shaped cam face
US4388897A (en) * 1980-09-22 1983-06-21 Bernard Rosa Variable camshaft assembly
JPS57188717A (en) * 1981-05-18 1982-11-19 Nissan Motor Co Ltd Intake and exhaust valve drive device in internal combustion engine
US4438737A (en) * 1981-10-13 1984-03-27 Investment Rarities, Incorporated Apparatus and method for controlling the valve operation of an internal combustion engine
JPS5896135A (en) * 1981-12-03 1983-06-08 Honda Motor Co Ltd Valve drive control device of internal-combustion engine
JPS5896134A (en) * 1981-12-03 1983-06-08 Honda Motor Co Ltd Valve drive control device of internal-combustion engine
US4457268A (en) * 1982-01-25 1984-07-03 Jones Darrell L Valve position control device
AU545712B2 (en) * 1982-07-23 1985-07-25 Honda Giken Kogyo Kabushiki Kaisha I.c. engine valve actuating apparatus
GB2133465A (en) * 1982-12-24 1984-07-25 Ford Motor Co I.c. engine camshaft drive mechanism
US4556025A (en) * 1983-11-18 1985-12-03 Mazda Motor Corporation Engine valve mechanism having valve disabling device
US4643141A (en) * 1986-01-26 1987-02-17 Bledsoe Phillip G Internal combustion engine valve lift and cam duration control system
SE464367B (en) * 1987-02-26 1991-04-15 Volvo Ab VALVE MECHANISM CONTROLS A DISTRICT VALVE
DE3833540A1 (en) * 1988-10-01 1990-04-12 Peter Prof Dr Ing Kuhn DEVICE FOR ACTUATING THE VALVES OF INTERNAL COMBUSTION ENGINES WITH VARIABLE VALVE LIFTING CURVE
JP2700692B2 (en) * 1989-06-30 1998-01-21 スズキ株式会社 Valve system for 4-cycle engine
JPH0830403B2 (en) * 1989-12-21 1996-03-27 卓也 松本 Engine valve drive
JP2546435B2 (en) * 1990-11-05 1996-10-23 三菱自動車工業株式会社 Cylinder head of internal combustion engine
US5197447A (en) * 1992-04-14 1993-03-30 Dick Leon B Engine having valve stroke adjuster and fuel preheater
US5988125A (en) * 1997-08-07 1999-11-23 Unisia Jecs Corporation Variable valve actuation apparatus for engine
DE19854382B4 (en) 1998-11-25 2009-01-02 Alstom Method and device for atomizing liquid fuel for a firing plant
DE10040544A1 (en) * 2000-08-18 2002-02-28 Schaeffler Waelzlager Ohg Variable valve drive for externally ignited internal combustion engine, includes movable support arranged in cylinder head and contacting lever which is provided between transmission and inlet valve
AT411090B (en) 2000-12-12 2003-09-25 Jenbacher Ag FULLY VARIABLE HYDRAULIC VALVE ACTUATOR
EP1379759A4 (en) 2001-03-16 2005-01-12 Frank A Folino Desmodromic valve actuation system
US7082912B2 (en) * 2001-03-16 2006-08-01 Folino Frank A System and method for controlling engine valve lift and valve opening percentage
US6953014B2 (en) * 2001-03-16 2005-10-11 Folino Frank A Thermal compensating desmodromic valve actuation system
FR2838769B1 (en) * 2002-04-22 2005-04-22 Mdi Motor Dev Internat VARIABLE FLOW RATE VALVE AND PROGRESSIVE CONTROLLED VALVE DISTRIBUTION FOR COMPRESSED AIR INJECTION ENGINE OPERATING IN MONO AND MULTIPLE ENERGY AND OTHER MOTORS OR COMPRESSORS
US7128034B2 (en) * 2002-10-18 2006-10-31 Maclean-Fogg Company Valve lifter body
US7273026B2 (en) * 2002-10-18 2007-09-25 Maclean-Fogg Company Roller follower body
FR2877991B1 (en) * 2004-11-16 2007-03-30 Renault Sas IMPROVED INTERNAL COMBUSTION ENGINE VALVE CONTROL DEVICE WITH VARIABLE LIFTING
EP1712747A1 (en) * 2005-04-17 2006-10-18 Uwe Eisenbeis Valve train with variable valve stroke and timing for high-speed engines
US8118003B2 (en) * 2008-03-12 2012-02-21 Kawasaki Jukogyo Kabushiki Kaisha Valve operating system
US7866292B2 (en) * 2008-03-26 2011-01-11 AES Industries Inc Apparatus and methods for continuous variable valve timing
US8033261B1 (en) 2008-11-03 2011-10-11 Robbins Warren H Valve actuation system and related methods
JP5486958B2 (en) * 2010-02-26 2014-05-07 本田技研工業株式会社 Rocker arm structure
US10316709B2 (en) 2015-09-21 2019-06-11 Eaton Intelligent Power Limited Electromechanical valve lash adjuster
GB2583912A (en) 2019-05-06 2020-11-18 Caterpillar Motoren Gmbh & Co Charge changing control device, reciprocating engine and method for operating a charge changing control device

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US2191459A (en) * 1940-02-27 duncan
US2097883A (en) * 1932-12-15 1937-11-02 Goetaverken Ab Internal combustion power plant
US2305787A (en) * 1937-09-18 1942-12-22 Kales Josef Internal combustion engine
US2804061A (en) * 1955-01-04 1957-08-27 John G Gamble Valve-actuating mechanism for internal combustion engines
US2851023A (en) * 1956-04-26 1958-09-09 Leroy A Durkan Variable valve timing
FR1284700A (en) * 1961-01-07 1962-02-16 Variable timing control
US3261338A (en) * 1964-07-13 1966-07-19 Automobile Racing Club Of Okla Valve timing mechanism
US3413965A (en) * 1967-07-13 1968-12-03 Ford Motor Co Mechanism for varying the operation of a reciprocating member
US3481314A (en) * 1967-08-29 1969-12-02 Georges G Lecrenn Means for optimizing the performance of internal combustion engines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987007323A1 (en) * 1986-05-21 1987-12-03 Bennett Automotive Technology Pty. Ltd. Engines for use with gaseous fuels
AU593665B2 (en) * 1986-05-21 1990-02-15 Bennett Automotive Technology Pty. Ltd. Engines for use with gaseous fuels

Also Published As

Publication number Publication date
DE7005077U (en) 1971-05-27
FR2032705A5 (en) 1970-11-27
ES376448A1 (en) 1972-04-16
US3641988A (en) 1972-02-15
DE2006618A1 (en) 1971-02-18

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees