| 摘要 |
A variable cam engine with an intake valve, including a first cam (11) shaped to allow an increased intake valve lift and an increased intake valve duration, a second cam (4) shaped to allow a reduced intake valve lift and a reduced intake valve duration, a cam switching mechanism (10) for switching between the first and second cams depending on an engine speed and an engine load, and a control unit (30,130) programmed to substantially equalize amounts of intake air flowing into the engine before and after switching from the first cam (11) to the second cam (4), and programmed to determine a first ignition timing when the second cam is operated and a second ignition timing when the first cam is operated, and advance the first ignition timing relative to the second ignition timing upon switching from the first cam (11) to the second cam (4). <IMAGE> |
