| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable an internal combustion engine with a supercharger, to reduce a surging noise in a speed reduced state, even when adopting an electrical controlled throttle valve. SOLUTION: The apparatus provides a recirculation valve 13, which is furnished with a recirculation passage 12 communicating between the downstream and the upstream sides of a suction compressor 5 of a supercharger 3, and is opened in a speed reduction state. Further, the apparatus keeps the throttle opening of an electrical controlled throttle valve 7 over a predetermined opening till the recirculation valve 13 comes to be opened, when the speed reduction state is detected. Specifically, the apparatus suppresses reduction in the throttle opening during a predetermined standard period, when the throttle opening becomes a predetermined standard value or less.</p> |
