| 摘要 |
PURPOSE:To prevent deterioration of efficiency of a compressor, when it is judged that one of solenoid valves for bypassing exhaust and waist gate is duty-controlled, by assuming that a breeding amount of a supercharger from the other of the solenoid valves is zero. CONSTITUTION:In a control device for engine having a supercharger, a supercharging pressure in a supercharge operation range where only a main turbocharger is used is controlled by means of an exhaust bypass valve. The supercharging pressure in a supercharger operation range where both turbochargers are used is controlled by means of a waist gate valve. An opening of the exhaust bypass valve is varied through duty-controlling of a solenoid valve 32. An opening of a waist gate valve is varied through duty-controlling of a solenoid valve 44. In case that a duty-control execution detecting means 60 detects that one of the solenoid valves 32, 44 is duty-controlled, a breed prevention control means 61 sends command to the other of the solenoid valves 32, 44 that a breeding amount be zero. |
