| 摘要 |
PURPOSE:To certainly judge the anomaly of a transmission passage leading to a pressure sensor from a pressure sensor and a suction pipe by transmitting the pressure in the suction pipe of an internal-combustion engine to the pressure sensor through a connection pipe and judging anomaly if the detected output of the pressure sensor does not vary when the engine load varies. CONSTITUTION:A connection pipe 4 is opened onto the wall of a suction pipe on the downstream side of a throttle valve 3 and is made of rubber for introducing the pressure to a pressure sensor 5. In a controller 7, the pressure Pm in the suction pipe is detected, and anomaly is judged, and the fuel feeding amount to an engine and ignition timing are calculated. In the sensor anomaly judging processing, judgement of anomaly is performed in the following cases: the case where the engine is in cranking operation, not in the normal operation, and the output of the sensor does not vary over a prescribed value, and the case where the engine is in normal operation and the engine load is constant, or the pressure does not vary. |
