DIAGNOSING METHOD OF AN ENGINE CLUTCH PRESSURE SENSOR FOR HYBRID VEHICLES

摘要

PURPOSE: A diagnosing method of an engine clutch pressure sensor for hybrid vehicles is provided to increase reliability on the protection of an engine and a driving system, and capability of a car by grasping troubles of the pressure sensor based on the output signal from the pressure sensor.;CONSTITUTION: A diagnosing method of an engine clutch pressure sensor for hybrid vehicles comprises the following steps: a step of checking a gear to determine whether the gear position is parking shift(S100); a step of checking EOP(elctric-powered oil pump) to determine whether the EOP of the engine clutch is in the stationary state(S200); a step of checking the soaking to determine whether the soaking time is over the first time(S300); a step of checking a car speed to determine whether the car is in the stationary state(S400); and a step of determining a malfunction of the pressure sensor in case that the output signal is over a fixed standard by checking the output signal from the engine clutch pressure sensor when the gear position is parking shift(S610). The first time in the step of checking the soaking is 8 hours, and the output signal in the determining step of is output voltage. The diagnosing method also comprises a step of checking a voltage to determine whether the input voltage of the engine clutch pressure sensor is under a fixed voltage(S10). The determining step checks the output signal of the engine clutch sensor in case that the input voltage is under the fixed voltage. The diagnosing method also comprises a step of checking the communication to determine whether the CAN communication of a hybrid controlling part or an engine controlling part(S20). The determining step checks the output signal of the engine clutch pressure sensor in case that the CAN communication of the hybrid controlling part or the engine controlling part is normal.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Start; (BB) End; (S10) Pressure voltage 10V ?; (S100) Gear position = P gear ?; (S20) HUC/ECU CAN normal?; (S300) Soaking time 8 hours ?; (S40) Is TM manipulation impossible?; (S400) Vehicle speed = 0 ?; (S500) Output voltage 0.7V ?; (S610) Determine the malfunction of sensor offset; (S620) Store malfunction information; (S630) Stop correcting the sensor offset; (S640) Control limp home; (S650) Warning lamp