DE2363891A1 - Valve control system for ic engine - valve rod is controlled by action of lever on adjustable curved surface - Google Patents

Valve control system for ic engine - valve rod is controlled by action of lever on adjustable curved surface

Info

Publication number
DE2363891A1
DE2363891A1 DE2363891A DE2363891A DE2363891A1 DE 2363891 A1 DE2363891 A1 DE 2363891A1 DE 2363891 A DE2363891 A DE 2363891A DE 2363891 A DE2363891 A DE 2363891A DE 2363891 A1 DE2363891 A1 DE 2363891A1
Authority
DE
Germany
Prior art keywords
valve
adjusting member
upward
eccentric
downward movement
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.)
Withdrawn
Application number
DE2363891A
Other languages
German (de)
Inventor
Werner Altmann
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.)
Daimler Benz AG
Original Assignee
Daimler Benz AG
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 claimed from DE19732335695 external-priority patent/DE2335695A1/en
Application filed by Daimler Benz AG filed Critical Daimler Benz AG
Priority to DE2363891A priority Critical patent/DE2363891A1/en
Priority to DE2428915A priority patent/DE2428915A1/en
Priority to IT51732/74A priority patent/IT1016177B/en
Priority to US487135A priority patent/US3911879A/en
Priority to FR7424110A priority patent/FR2237058B1/fr
Priority to GB3081374A priority patent/GB1437673A/en
Publication of DE2363891A1 publication Critical patent/DE2363891A1/en
Withdrawn legal-status Critical Current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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/042—Cam discs
    • 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
    • F01L13/0063—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 cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • 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
    • F01L31/00—Valve drive, valve adjustment during operation, or other valve control, not provided for in groups F01L15/00 - F01L29/00
    • F01L31/08—Valve drive or valve adjustment, apart from tripping aspects; Positively-driven gear
    • F01L31/14—Valve adjustment by links or guide rods, e.g. in valve-gears with eccentric drive
    • 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
    • F01L13/0063—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 cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
    • F01L2013/0068—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 cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
    • 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
    • F01L2305/00—Valve arrangements comprising rollers
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Transmission Devices (AREA)

Abstract

The valve actuating shaft (2) has a crank (3) carrying a connecting rod (4) which carries a roller (5) at its other end. The roller (5) is made to oscillate in the horizontal plane by rotation of the shaft (2) and the roller runs between the flat upper fixed surface (14) and the lower curved surface (17) which forms a part of the hinged member (8) attached to the shaft (9). When the roller (5) runs over the sloping portion of the member (8) it forces it downwards together with the valve rod (12) and so opens the valve. By sliding the shaft (9), which can be controlled by engine operating conditions, the opening of the valve can be varied.

Description

Daimler-Benz Aktiengesellschaft Palm 9892/k Daimler-Benz Aktiengesellschaft Palm 9892 / k Stuttgart-Untertürkheim 2O, Dezember 1973Stuttgart-Untertürkheim 2O, December 1973

Ventilverstellung für Brennkraftmaschinen (Zusatzanmeldung zu P 23 35 695.8)Valve adjustment for internal combustion engines (additional registration to P 23 35 695.8)

Die Erfindung betrifft eine Ventilverstellung für Brennkraftmaschinen, bestehend aus einer Antriebswelle, einer Einrichtung zur Umwandlung der Drehbewegung in eine das Ventil betätigende Auf- und Abwärtsbewegung und einer Einrichtung zur Veränderung der Ventilerhebung in Abhängigkeit von der Drehzahl und der Belastung der Brennkraftmaschine, wobei die Antriebswelle als Kurbelwelle ausgebildet ist, die eine angelenkte Kurbelstange zwischen einer ortsfesten Stützwand und einem, in einem spitzen Winkel zu dieser zulaufenden, schwenkbar gelagerten, keilförmigen Verstellglied hin-und herbewegt, wodurch das Verstellglied infolge der Keilwirkung eine Auf- und Abwärtsbewegung ausführt und diese auf das Ventil überträgt, und durch Verschieben des Verstellgliedes der Hub und der Öffnungswinkel des Ventile verändert wird, ohne daß sich im Steuerungsdiagramm die Lage der Symmetrieachse für die Auf- und Abwärtsbewegung mitverändert, nach(Patentanmeldung P 23 35 695.8).The invention relates to a valve adjustment for internal combustion engines, consisting of a drive shaft, a Device for converting the rotary movement into an upward and downward movement that actuates the valve and a device for changing the valve lift as a function of the speed and the load on the internal combustion engine, the drive shaft being designed as a crankshaft with a hinged connecting rod between a stationary support wall and a pivotable, wedge-shaped wall that tapers at an acute angle to this Adjusting member moved back and forth, as a result of which the adjusting member executes an upward and downward movement as a result of the wedge effect and transmits this to the valve, and by moving the adjusting member, the stroke and the opening angle of the valve is changed without changing in the control diagram the position of the axis of symmetry for the upward and downward movement also changed, according to (patent application P 23 35 695.8).

Aufgabe der Erfindung ist es, die Ventilvereteilung nach dem Hauptpatent so zu verbessern, daß diese leicht montiert und billig hergestellt werden kann. Außerdem sollen die Teile keinem nennenswerten Verschleiß unterliegen.The object of the invention is to improve the valve distribution according to the main patent so that it is easy to assemble and can be manufactured cheaply. In addition, the parts should not be subject to any significant wear.

509 8 26/0165509 8 26/0165

- 2 - Palm 9892A - 2 - Palm 9892A

Diese Aufgabe wird erfindungsgemäß dadurch gelößt, daß .die Kurbelstange bei der Hin- und Herbewegung sich einerseits mit einem segmentartig geformten Teil gegen die ortsfeste Stützwand abstützt. Dies bringt den Vorteil, daß die Rolle frei auf der Kurvenbahn dea Verstellgliedes abrollen kann« This object is achieved according gelößt in that .the crank rod on the one hand is supported in the back and forth movement with a segment-shaped part against the fixed bulkhead. This has the advantage that the roller can roll freely on the cam track of the adjusting member «

In weitere Ausgestaltung der Erfindung kann das an einem Ende .kugelförmig ausgebildete und in einem Kolben gelagerte Verstellglied durch eine Feder gegen einen Exzenterbolzen gehalten werden und eine verstellbare Ventilkappe in den Schlitz eingreifen und das Verstellglied fuhren.In a further embodiment of the invention, the adjusting member, which is spherical at one end and mounted in a piston, can be held by a spring against an eccentric pin and an adjustable valve cap can engage in the slot and guide the adjusting member.

Ferner kann der Exzenterhol ssen eine zylindrische Exzenterfläche aufweisen und die wirksame Arbeitefläche des Exzenterbolzens kann innerhalb der Außenkonturen der Lagerzapfen liegen.Furthermore, the Exzenterhol ssen a cylindrical eccentric surface have and the effective working surface of the eccentric bolt can be within the outer contours of the bearing pin lie.

Die Erfindung ist anhand eines in der Zeichnung dargestellten AusfUhrungsbeispieles näher erläutert ι die Figur zeigt eine Querschnitt-Ansicht der erfindungsgemäßen Ventilverstellung. The invention is explained in more detail using an exemplary embodiment shown in the drawing ι the figure shows a cross-sectional view of the valve adjustment according to the invention.

Bsi der dargestellten Vomt liver stellung ist im Gehäuse ΐ eine Kurbelwelle 2 gelagert, ass. deren Kurbel 3 eine Kurbelstange k angelenkt ist. Die Kurbelstange 4 stützt sich mit einem segmentartig geformten Teil 5 gegen, eine ortefeste Stützwand 6 ab, während gegenüberliegend ©ine Rolle ' vorgesehen ist» die während d©r Hin- und H©:rb@w©jpaag durch die ICusrbel 3 auf einer iZ%xnf®nh&hn 8 ©ines Vörstell^liades 9 abrollt. Das ¥erst©llgli8d 9 ist an eines Esm£© 10 kugel» färsig ausgebildet und- in einem Kolben 11 gelagert. EineBsi the illustrated Vomt liver position, a crankshaft 2 is mounted in the housing ΐ, ass. whose crank 3 a connecting rod k is articulated. The connecting rod 4 is supported with a segment-like shaped part 5 against a stationary support wall 6, while opposite a roller is provided which during the back and forth through the hub 3 on one iZ% xnf®nh & hn 8 © ines Vörstell ^ liades 9 unrolls. The first © llgli8d 9 is spherical on an esm £ © 10 and is mounted in a piston 11. One

. - 3 -■. - 3 - ■

509826/0165509826/0165

Feder 12 hält das Verstellglied 9 mit dem Kolben 11 gegen einen Exzenterbolzen 13. In einem Schlitz 1U des Verstellgliedes 9 ist eine Rolle 15 vorgesehen, welche auf eine verstellbare Ventilkappe 16 einwirkt, die ihrerseits in den Schlitz 14 eingreift und das Verstellglied 9 führt. Die Verstellkappe 16 ist mit dem Ventil 17 verbunden.Spring 12 holds the adjusting member 9 with the piston 11 against an eccentric pin 13. In a slot 1U of the adjusting member 9, a roller 15 is provided, which on a adjustable valve cap 16 acts, which in turn engages in the slot 14 and guides the adjusting member 9. The adjustment cap 16 is connected to the valve 17.

Der Exzenterbolzen 13 weist eine zylindrische Exzenterfläche 18 auf, dessen wirksame Arbeitsfläche innerhalb der Außenkonturen 19 der Lagerzapfen 20 liegt. Je nach Einsteuerung des Verstellgliedes 9 durch Verdrehen des Exzenterbolzen 13 und Verschieben des Kolbens 11, wird der Hub und der Öffnungswinkel des Ventils 17 verändert.The eccentric bolt 13 has a cylindrical eccentric surface 18, the effective working surface within the outer contours 19 of the bearing pin 20 is located. Depending on the control of the adjusting member 9 by turning the Eccentric bolt 13 and moving the piston 11, the stroke and the opening angle of the valve 17 is changed.

509826/0 165509826/0 165

Claims (1)

- k - Palm 9892/4 - k - Palm 9892/4 AnsprücheExpectations Ventilverstellung für Brennkraftmaschinen, bestehend aus einer Antriebswelle, einer Einrichtung zur Umwandlung der Drehbewegung in eine das Ventil betätigende Auf- und Abwärtsbewegung und einer Einrichtung zur Veränderung der Ventilerhebung in Abhängigkeit von der Drehzahl und der Belastung der Brennkraftmaschine, wobei die Antriebswelle als Kurbelwelle ausgebildet ist, die eine angelenkte Kurbelstange zwischen einer ortsfesten Stützwand und einem, in einem spitzen Winkel zu dieser zulaufenden, schwenkbar gelagerten, keilförmigen Verstellglied hin- und herbewegt, wodurch das Verstellglied infolge der Keilwirkung eine Auf- und Abwärtsbewegung ausführt unddiese auf das Ventil überträgt, und durch Verschieben des Verstellgliedes der Hub und der Öffnungswinkel des Ventile verändert wird, ohne daß sich im S$eue— rungsdiagramm die Lage der Symmetrieachse für die Auf- und Abwärtsbewegung mit verändert, nach Patentanmeldung P 23 35 695·8, dadurch gekennzeichnet, daß die Kurbelstange (k) bei der Hin- und Herbewegung sich einerseits mit einem aegmentartig geformten Teil (5) gegen die ortsfeste Stützwand (6) abstützt.Valve adjustment for internal combustion engines, consisting of a drive shaft, a device for converting the rotary movement into an upward and downward movement that actuates the valve and a device for changing the valve lift as a function of the speed and the load on the internal combustion engine, the drive shaft being designed as a crankshaft, which moves a hinged connecting rod back and forth between a stationary support wall and a pivotably mounted, wedge-shaped adjusting member tapering to this at an acute angle, whereby the adjusting member executes an upward and downward movement as a result of the wedge effect and transfers this to the valve, and by displacement of the adjusting element, the stroke and the opening angle of the valve are changed without changing the position of the axis of symmetry for the upward and downward movement in the control diagram, according to patent application P 23 35 695 8, characterized in that the connecting rod ( k) at de The back and forth movement is supported on the one hand with a segment-like part (5) against the stationary support wall (6). 2, Ventilverstellung nach Anspruch 1, mit einer in einem Schlitz gelagerten und auf den Ventilschaft einwirkenden Rolle, dadurch gekennzeichnet, daß das an einem Ende (1O) kugelförmig ausgebildete und in einem Kolben (11) gelagerte Verstellglied (9) durch eine Feder (12)2, valve adjustment according to claim 1, with one in one Slit mounted and acting on the valve stem role, characterized in that the one End (1O) spherical adjusting member (9) mounted in a piston (11) by a spring (12) 509826/0165509826/0165 gegen einen Exzenterbolzen (13) gehalten wird und eine verstellbare Ventilkappe (16) in den Schlitz (i*0 eingreift und das Verstellglied führt. r is held against an eccentric bolt (13) and an adjustable valve cap (16) engages in the slot (i * 0 and guides the adjusting member. r 3» Ventilverstellung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß die Exzenterbolzen (13) eine zylindrische Exzenterfläche (18) aufweisen und die wirksame Arbeitsfläche des Exzenterbolzens innerhalb der Außenkonturen (19) der Lagerzapfen (20) liegt.3 »valve adjustment according to claims 1 and 2, thereby characterized in that the eccentric bolts (13) have a cylindrical eccentric surface (18) and the effective working surface of the eccentric bolt within the Outer contours (19) of the bearing pin (20) lies. . 60 9826/0165. 60 9826/0165 LeerseiteBlank page
DE2363891A 1973-07-13 1973-12-21 Valve control system for ic engine - valve rod is controlled by action of lever on adjustable curved surface Withdrawn DE2363891A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE2363891A DE2363891A1 (en) 1973-07-13 1973-12-21 Valve control system for ic engine - valve rod is controlled by action of lever on adjustable curved surface
DE2428915A DE2428915A1 (en) 1973-12-21 1974-06-15 V. engine exhaust and inlet valve adjustment system - has single eccentric shaft for both inlet and exhaust
IT51732/74A IT1016177B (en) 1973-07-13 1974-06-25 IMPROVEMENT IN THE REGULATION PROVISIONS OF VALVES FOR INTERNAL COMBUSTION ENGINES
US487135A US3911879A (en) 1973-07-13 1974-07-10 Valve adjustment mechanism for internal combustion engine
FR7424110A FR2237058B1 (en) 1973-07-13 1974-07-11
GB3081374A GB1437673A (en) 1973-07-13 1974-07-11

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19732335695 DE2335695A1 (en) 1973-07-13 1973-07-13 I.C. engine valve regulation method - in which crankshaft rotary motion transfers a reciprocating motion to the valve stem
DE2363891A DE2363891A1 (en) 1973-07-13 1973-12-21 Valve control system for ic engine - valve rod is controlled by action of lever on adjustable curved surface

Publications (1)

Publication Number Publication Date
DE2363891A1 true DE2363891A1 (en) 1975-06-26

Family

ID=25765483

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2363891A Withdrawn DE2363891A1 (en) 1973-07-13 1973-12-21 Valve control system for ic engine - valve rod is controlled by action of lever on adjustable curved surface

Country Status (5)

Country Link
US (1) US3911879A (en)
DE (1) DE2363891A1 (en)
FR (1) FR2237058B1 (en)
GB (1) GB1437673A (en)
IT (1) IT1016177B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261307A (en) * 1979-09-06 1981-04-14 Sidney Oldberg Variable valve timing control for internal combustion engines
DE3022188A1 (en) * 1980-06-13 1981-12-24 Teodoro 4300 Essen Holtmann VALVE CONTROL DEVICE OF AN INTERNAL COMBUSTION ENGINE
DE3115422A1 (en) * 1981-04-16 1982-11-11 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg HYDRAULIC DEVICE FOR ACTUATING GAS EXCHANGE VALVES
US6360971B1 (en) 1998-11-25 2002-03-26 Alstom Method and appliance for atomizing liquid fuel for a firing installation
EP1215369A2 (en) 2000-12-12 2002-06-19 Jenbacher Aktiengesellschaft Variable hydraulic valve drive

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US4205634A (en) * 1978-02-17 1980-06-03 Tourtelot Edward M Jr Variable valve timing mechanism
US4182290A (en) * 1978-06-22 1980-01-08 Pohle William A Variable ratio rocker arm
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
FR2484016A1 (en) * 1980-06-09 1981-12-11 Renault Valve for IC-engine - has timing adjusted by profiled lever acted on by two linked cams
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
US4502426A (en) * 1982-05-17 1985-03-05 Skelley James H Variable valve lift and timing mechanism
DE3406100A1 (en) * 1984-02-18 1985-08-22 Willi 7171 Michelfeld Roth Speed-dependent adjustment of the valve timing in combustion engines
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
GB8723256D0 (en) * 1987-10-03 1987-11-04 Jaguar Cars Valve mechanisms
IT1220275B (en) * 1988-01-19 1990-06-15 Franco Storchi COMPLEX OF ELEMENTS FOR VARIABLE TIMING OF THE VALVES OF AN ENGINE, IN PARTICULAR OF AN INTERNAL COMBUSTION ENGINE
US4848180A (en) * 1988-09-06 1989-07-18 Henley Manufacturing Corporation Low-friction, boat-type rocker arm
US5165370A (en) * 1991-04-25 1992-11-24 Gerald Beaumont Mechanism for controlling valve timing
US5463987A (en) * 1994-07-13 1995-11-07 Cukovich; Mark S. Variable valve timing mechanism
JP2003512587A (en) * 1999-10-15 2003-04-02 ヴィー トゥー ピーティーワイ リミテッド Guide plate for poppet valve
HK1033238A2 (en) * 2001-01-20 2001-08-03 Foo Wah Lau A control device for an air valve of an internal combustion engine
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
US6619250B2 (en) 2001-03-16 2003-09-16 Frank A. Folino Desmodromic valve actuation system
GB0200935D0 (en) * 2002-01-16 2002-03-06 Lotus Car Valve operating mechanisms
DE10215281A1 (en) * 2002-04-06 2003-10-16 Willi Roth Device for continuously varying the valve lift in internal combustion engines
DE102004035005A1 (en) * 2004-07-20 2006-02-16 Bayerische Motoren Werke Ag Valve gear of an internal combustion engine
EP1712747A1 (en) * 2005-04-17 2006-10-18 Uwe Eisenbeis Valve train with variable valve stroke and timing for high-speed engines
US8033261B1 (en) 2008-11-03 2011-10-11 Robbins Warren H Valve actuation system and related methods
DE102010018712B4 (en) * 2010-04-29 2022-01-20 Audi Ag Valve drive for a gas exchange valve with rolling contact between cam follower and valve stem

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US2401480A (en) * 1942-01-26 1946-06-04 Aero Engines Ltd Valve actuation
US2696201A (en) * 1950-09-19 1954-12-07 Daimler Benz Ag Valve control mechanism of internalcombustion engines
US2851023A (en) * 1956-04-26 1958-09-09 Leroy A Durkan Variable valve timing
US2954017A (en) * 1958-03-29 1960-09-27 Porsche Kg Valve control arrangement for internal combustion engines
US2997991A (en) * 1960-02-08 1961-08-29 Henry A Roan Variable valve timing mechanism for internal combustion engines
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
GB1299673A (en) * 1969-02-13 1972-12-13 Fiat Spa Improvements relating to valve actuating mechanisms for internal combustion engines

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4261307A (en) * 1979-09-06 1981-04-14 Sidney Oldberg Variable valve timing control for internal combustion engines
DE3022188A1 (en) * 1980-06-13 1981-12-24 Teodoro 4300 Essen Holtmann VALVE CONTROL DEVICE OF AN INTERNAL COMBUSTION ENGINE
DE3115422A1 (en) * 1981-04-16 1982-11-11 M.A.N. Maschinenfabrik Augsburg-Nürnberg AG, 8500 Nürnberg HYDRAULIC DEVICE FOR ACTUATING GAS EXCHANGE VALVES
US6360971B1 (en) 1998-11-25 2002-03-26 Alstom Method and appliance for atomizing liquid fuel for a firing installation
EP1215369A2 (en) 2000-12-12 2002-06-19 Jenbacher Aktiengesellschaft Variable hydraulic valve drive

Also Published As

Publication number Publication date
FR2237058A1 (en) 1975-02-07
GB1437673A (en) 1976-06-03
IT1016177B (en) 1977-05-30
FR2237058B1 (en) 1977-03-18
US3911879A (en) 1975-10-14

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