| 摘要 |
PURPOSE: To a reduce supercharging delay at the time of reacceleration by restraining dropping of rotation due to deceleration of the number of rotation of a turbine smoothly without lowering of intercooler internal pressure supplied to the exhaust side through a secondary air supply passage, that is, suction internal pressure of the upstream side of a throttle valve in the case when the supercharging delay due to lowering of the number of rotation of the turbine of a turbo charger is required to reduce. CONSTITUTION: A by-pass valve ABV is devised to close at the time of opening a secondary air control valve ACV by respectively and separately providing the by-pass valve ABV to release high pressure air in a suction passage on the downstream side of a compressor for supercharging to the side of atmospheric air or to the side of a compressor inlet at the time of ordinary travelling and at the time of deceleration under another specified condition and the secondary air control valve ACV to communicate the suction passage on the downstream side of the compressor and an exhaust passage to each other through a secondary air supply passage 33 at the time of deceleration under a specified condition different from the condition at the time of sport travelling, etc. |
