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1. WO2006121181 - VARIABLE VALVE-OPERATING DEVICE

Publication Number WO/2006/121181
Publication Date 16.11.2006
International Application No. PCT/JP2006/309625
International Filing Date 09.05.2006
Chapter 2 Demand Filed 09.02.2007
IPC
F01L 13/00 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
13Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
F01L 1/26 2006.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
1Valve-gear or valve arrangements, e.g. lift-valve gear
26characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift valves per cylinder
CPC
F01L 1/267
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
1Valve-gear or valve arrangements, e.g. lift-valve gear
26characterised by the provision of two or more valves operated simultaneously by same transmitting-gear; peculiar to machines or engines with more than two lift-valves per cylinder
267with means for varying the timing or the lift of the valves
F01L 13/0036
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
13Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
0015for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
0036the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
F01L 13/0063
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
13Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
0015for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
0063by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
F01L 2013/0068
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
LCYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
13Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
0015for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
0063by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
0068with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
Applicants
  • TOYOTA JIDOSHA KABUSHIKI KAISHA [JP]/[JP] (AllExceptUS)
  • TATENO, Manabu [JP]/[JP] (UsOnly)
  • EZAKI, Shuichi [JP]/[JP] (UsOnly)
Inventors
  • TATENO, Manabu
  • EZAKI, Shuichi
Agents
  • TAKAHASHI, Hideki
Priority Data
2005-13855211.05.2005JP
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) VARIABLE VALVE-OPERATING DEVICE
(FR) DISPOSITIF DE COMMANDE VARIABLE DE SOUPAPE
Abstract
(EN) The rotary motion of a camshaft is transmitted from a first drive cam to a slide surface of a swing cam arm via intermediate members so that the swing cam arm lifts a valve. In this instance, the operating characteristic of the valve changes when the rotation position of a control shaft changes to change the positions of the intermediate members on the slide surface. When the operating characteristic control mode for the valve is to be changed from variable control to fixed control, coupling means couples the swing cam arm and input arm, thereby causing a second drive cam to swing the swing cam arm. The setting for the lift amount of the valve that is obtained when the second drive cam swings the swing cam arm is not smaller than a maximum lift amount setting for a situation where the first drive cam swings the swing cam arm.
(FR) L’invention concerne le mouvement rotatif d’un arbre à cames qui est transmis depuis une première came de commande vers une surface du coulisseau d’un levier à came oscillant via des éléments intermédiaires de sorte que le levier à came oscillant lève une soupape. Dans ce cas, la caractéristique de fonctionnement de la soupape est modifiée lorsque la position de rotation d’un arbre de commande est modifiée pour modifier les positions des éléments intermédiaires sur la surface du coulisseau. Lorsque le mode de commande caractéristique du fonctionnement de la soupape passe de la commande variable à la commande fixe, le moyen de couplage couple le levier à came oscillant et le bras d’entrée, ce qui entraîne l’oscillation par une seconde came de commande du levier à came oscillant. Le réglage de la hauteur de levage de la soupape obtenu lorsque la seconde came de commande fait osciller le levier à came oscillant n’est pas inférieur au réglage d’une hauteur de levage maximale pour une situation où la première came de commande fait osciller le levier à came oscillant.
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