| 摘要 |
<p>PROBLEM TO BE SOLVED: To remedy the inconvenience that overshoot is produced, and an operating sense of an accelerator pedal is different from an actual driving sense due to opening control of a waste gate valve so as to make a supercharging pressure a target supercharging pressure at all times in a partial load zone, when carrying out feedback control of the supercharging pressure by a turbo supercharger. SOLUTION: In the turbo supercharger for supercharging an intake air by using exhaust gas of an engine provided with a throttle valve 13, pressure required for opening and closing control of a waste gate valve 7 of the tube supercharger, is controlled with a control valve so as to obtain a target supercharging pressure set in accordance with a number of rotations of the engine. A limiting value of a control variable for controlling an opening of a control valve is set so that the supercharging pressure is less than the target supercharging pressure in a zone where at least the opening degree of a throttle valve 13 is in a middle opening degree.</p> |
