| 摘要 |
<p>PURPOSE:To prevent the generation of noise occasioned by surging by a method wherein, in a device in which a reflux valve is located in an intake air reflux passage for intercommunicating the upper and lower streams of the compressor of a supercharger, control is effected so that the reflux valve is opened during detection of rapid closing of a throttle valve. CONSTITUTION:In an internal combustion engine with a supercharger, through running of a compressor 5 coupled directly to a turbine 4 of a supercharger 3 rotated by means of an exhaust gas, air in an intake air passage 6 is boosted, and supercharging to a combustion chamber 10 is effected through an intercooler 7, a throttle valve 8, and a collector 9. An intake air passage part 6 between the intercooler 7 and the throttle valve 8 is connected to the intake air passage part on the upper stream side of the compressor 5 through a reflux passage 14, and a reflux valve 15 is located in the middle thereof. In this case, control is effected so that when, based on output signals from a throttle sensor 31 and a number of revolutions sensor 33, rapid closing of the throttle valve 8 is detected by a control unit 32, the reflux valve 15 is opened.</p> |
