| 摘要 |
PROBLEM TO BE SOLVED: To improve acceleration time torque responsiveness restricted by responsiveness of variable valve systems. SOLUTION: A target load tQH0 is calculated from accelerator opening APO and an engine speed Ne. A target angle tVEL of a lift operating angle of the first variable valve system and a target angle tVTC of a central angle of the second variable valve system are determined in response to this target load. In acceleration when the engine speed Ne is a predetermined engine speed cNe or more and a deviation errVTC of the central angle is a reference deviation cerrVTC2 or more, a correction quantity hosQH0 is added to the target load tQH0, and is set as a transition time target load tQH0d. The target load tQH0 is used as it is at steady time. Since a negative pressure control valve target opening arithmetic operation part 43 calculates negative pressure control valve target opening tBCV by using the transition time target load tQH0d, opening becomes larger than the steady time, and suction negative pressure reduces. Thus, actual torque is highly provided, and the torque responsiveness is improved. COPYRIGHT: (C)2006,JPO&NCIPI
|
