Valve control apparatus for internal combustion engine

Details Valve control apparatus for internal combustion engine Valve control apparatus for internal combustion engine

F - Mech Eng,Light,Heat,Weapons

01

L

F01L 13/00 (2006.01) F01L 1/26 (2006.01) F01L 9/04 (2006.01)

Patent

CA 2455660

A valve control apparatus for an internal combustion engine is provided which is capable of optimally setting the closing timing of an engine valve according to operating conditions of the engine while suppressing an increase in the inertial mass of the engine valve to the minimum, thereby attaining improvement of fuel economy, and realization of higher engine rotational speed and higher power output in a compatible fashion, and reducing costs and weight thereof. The valve control apparatus controls opening and closing operations of an engine valve. A cam-type valve actuating mechanism actuates the engine valve to open and close the engine valve, by a cam which is driven in synchronism with rotation of the engine. An actuator makes blocking engagement with the engine valve having been opened, to thereby hold the engine valve in an open state. An ECU controls operation of the actuator to thereby control closing timing of the engine valve.

L'invention concerne un appareil de commande de soupape de moteur à combustion interne capable de supprimer l'augmentation de la masse inertielle d'une soupape de moteur et de régler de manière appropriée le temps de fermeture de la soupape selon le mode de fonctionnement, ce qui permet d'améliorer la consommation de carburant spécifique et d'augmenter la vitesse de rotation et le rendement du moteur, outre une réduction de coût et de poids. Cet appareil de commande de soupape permet de commander l'ouverture/fermeture de la soupape du moteur. Un dispositif de commande de soupape à came ouvre/ferme la soupape du moteur au moyen d'une came entraînée en synchronisation avec la rotation du moteur à combustion interne. Un actionneur entre en prise avec la soupape de moteur ouverte et maintient cette dernière en position ouverte. Une unité ECU permet de commander le fonctionnement de l'actionneur, d'où le réglage du temps de fermeture de la soupape du moteur.

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