Variable valve device of internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHisaki Ito, Takashi Ogawa
Life of this patent
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Abstract
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.
Claims14
A variable valve device for an internal combustion engine, the variable valve device comprising:
- a variable valve mechanism that can change a working angle of an intake valve while holding a maximum lift amount of the intake valve constant, and
- the variable valve device is configured to retard a timing for closing the intake valve as a load of the internal combustion engine rises and enlarge the working angle, while holding a timing for opening the intake valve constant.
Dependencies are inferred from the claim text.