| 摘要 |
PURPOSE:To improve the extent of responsiveness to an accelerator change by controlling a bypass passage bypassing a supercharger so as to be forcibly closed at the time of engine load lower than that of an economy mode in a supercharging area at time of a power mode. CONSTITUTION:In engine driving, an intake air quantity Q, engine speed Ne and a mode signal or the like are taken into a central processing unit 30, making it perform a mode judgment, first of all. At the time of judging a power mode, the proper second map is read out, making it execute a range judgment on the basis of an input signal Q and the engine speed Ne. In brief, whether an engine driving state is in a nonsupercharged area or not under the power mode state of an automatic transmission 35 is judged, and when the nonsupercharged range is judged, a three-way solenoid valve 19 is turned to OFF, and pressure in the upstream of a throttle valve 4 is affected on a diaphragm chamber 18a, opening an on-off valve 18, thus a bypass passage 17 is opened. On the other hand, at the supercharged range, the on-off valve 18 is closed at time of engine load lower than that of an economy mode, thereby closing the bypass passage 17. |
