| 摘要 |
<p>PURPOSE:To aim at retroactively obtaining a high output power to prevent an engine from knocking, by controlling the flow of exhaust gas led to an exhaust gas in accordance with the octane number of used fuel to obtain a desired supercharging pressure control value in accordance with the octane number. CONSTITUTION:A flap drive means mainly composed of a diaphragm device 22 and a solenoid valve 23 positionally controls a flap 21. A bypass drive means mainly composed of a diaphragm device 15, a solenoid 16, etc., controls a bypass valve 14. The solenoid valve 23 for the flap and the solenoid valve 16 for the bypass valve 16 are controlled to be opened and closed in accordance with an octane number map selected corresponding to the octane number of used fuel which is delivered from an octane number detecting means.</p> |
