| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable valve system for an internal combustion engine and an intake amount control device capable realizing sure operation and reliability without disposing long and complex link mechanism. SOLUTION: Since an intermediative driving mechanism 120 is slidably supported by a supporting pipe 130 as a shaft which is different from an intake cam shaft 45, an intake valve 12a can be driven through a slidable cam 126 and a rocker arm 13 when an intake cam 45a is driven by being brought into contact with an input part 122. Since a relative phase difference between the slidable cam 126 and the input part 122 is varied through a control shaft 132 by a lift amount variable actuator, a lift amount of the intake value 12a and the degree of an operating angle are continuously regulated. It is thus possible to vary the lift amount and the operating angle with a comparatively simple structure without using the long and complex link mechanism. Furthermore, it is thus possible to provide the variable valve system capable of realizing sure operation and reliability.
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