Oblon, McClelland, Maier & Neustadt, L.L.P.
Variable valve device of internal combustion engine
A variable valve device for an internal combustion engine is equipped with a variable valve mechanism capable of changing the working angle of an intake valve while holding the maximum lift amount of the intake valve constant. The variable valve device retards the timing for closing the intake valve as the load of the internal combustion engine rises, and enlarges the working angle, while holding the timing for opening the intake valve constant. Operating characteristics of the intake valve are provided in accordance with the load of the internal combustion engine.
TOYOTA JIDOSHA KABUSHIKI KAISHA
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Hisaki Takashi
Ito Ogawa