| 摘要 |
PURPOSE: A device for releasing the noise and pressure of an LPG vehicle in backfiring is provided to prevent the explosion noise from being discharged into the outside and the damage of parts by smoothly releasing the high pressure of a surge tank caused by backfire. CONSTITUTION: A Manifold Absolute Pressure(MAP) sensor detects the pressure of an intake manifold. A Throttle Position Sensor(TPS) detects the open degree of a throttle valve(6). A bypass valve(9) connects a surge tank(7) to an air supply hose(3) by a connecting hose. The bypass valve(9) is automatically open by the high pressure of the surge tank(7) in backfiring and discharges the high pressure of the surge tank(7) into the air supply hose(3). An ECU shuts off the throttle valve(6) when the output values of the TPS and MAP sensors are more than a reference value.
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