Device and method for oil pressure sensor fault sensing for vehicle

摘要

A fault sensing device for a vehicle includes a time measuring section functioning as a sleep mode while power to a controller is off. The time measuring section can measure a stop time of an engine, and can transmit information on the stop time to the controller when power to the controller is on. When the controller determines that a stop time of the engine is a predetermined time, the controller performs fault sensing for an oil pressure switch.

主权项

1. An oil pressure sensor fault sensing device for a vehicle, the oil pressure sensor fault sensing device comprising:
an oil pressure sensor configured to detect an oil pressure of an engine oil of an internal combustion engine as a driving source of the vehicle; an ECU configured to control operation of said internal combustion engine, the ECU configured to perform fault sensing for said oil pressure sensor; and a time measuring section functioning as a sleep mode even while power to said ECU is off; wherein said time measuring section is configured to measure a stop time of said internal combustion engine during said sleep mode, and to transmit information on the stop time to said ECU when the power to the ECU is turned on wherein when said ECU determines that the stop time of said internal combustion engine is at least a predetermined time on a basis of the information from said time measuring section to perform the fault sensing for said oil pressure sensor in a state of said internal combustion engine not generating an oil pressure, said ECU is configured to perform the fault sensing for said oil pressure sensor; and wherein said ECU is configured to perform the fault sensing for said oil pressure sensor when it is determined that vehicle speed is absent during the stop time of said internal combustion engine.