| 摘要 |
PROBLEM TO BE SOLVED: To prevent an operating performance of an internal combustion engine from being deteriorated at a transient time.SOLUTION: A variable valve timing mechanism 25a and a throttle valve 15 are controlled in such a way that a timing in which an intake negative pressure at a downstream side of the throttle valve 15 starts to change due to a variation of degree of opening of the throttle valve 15 and a timing in which a valve timing of an intake valve 18 starts to change are synchronized at a transient time in which a desired torque changes, a desired opening degree of the throttle valve 15 is amended to increase or decrease in response to the state of transient. That is, at the time of acceleration in which the desired torque is increased, it is corrected in such a way that a degree of opening of the throttle valve 15 becomes larger as compared with that of normal state and an increased amount of the intake negative pressure is increased. In addition, at the time of deceleration in which the desired torque is decreased, it is corrected such that a degree of opening of the throttle valve 15 becomes low in respect to the desired torque as compared with that of the normal state and a reduction amount of the intake negative pressure is increased. |
