| 摘要 |
<p>PURPOSE:To prevent the unstable operation of an opening/closing valve by providing a control valve controlled corresponding to supercharging pressure in a connecting passage in a supercharging device for an internal combustion engine in which the opening/closing valve provided in a bypass passage for detouring the turbine of a supercharger is opened/closed by supercharging pressure introduced via the connecting passage. CONSTITUTION:A bypass passage 15 is branched and connected to a turbocharger 2 attached to an engine 1 for detouring a turbine 16. The bypass passage 15 is opened/closed by an opening/closing valve 13. The opening/closing valve 13 is operated by an actuator 6 the driving source of which is supercharging pressure introduced to a pressure chamber 7 via a connecting passage 5 branched from the down stream of a compressor 3 in an intake passage 4, and is opened/closed by the displacement of a diaphragm 9 via rod etc. In this case, a control valve (three way valve) 19 is provided in the connecting passage to be switching-controlled corresponding to the output of an pressure sensor which detects supercharging pressure for being closed at less than predetermined supercharging pressure and for being opened more than predetermined supercharging pressure.</p> |
