Patent ID: 8042998
Filing Date: 2011-10-25
Classification: F16H

Abstract:
1. A method for detecting a fault of an oil temperature sensor for a hydraulic controller of an automatic transmission by using a determining means for detecting a fault of the oil temperature sensor based on temperature changes of the oil according to a driving mode, the method comprising the steps of: a) detecting a vehicle voltage inputted to the oil temperature sensor and comparing the detected vehicle voltage with a critical vehicle voltage; b) detecting an input voltage of the oil temperature sensor and comparing the detected input voltage of the oil temperature sensor with a lowest critical temperature, step b) comprising the sub-steps of: c) comparing the input voltage of the oil temperature sensor with a highest critical voltage; step c) comprising the sub-steps of: d) comparing temperature of coolant of an engine, revolutions per minute (RPM) of the engine, and RPM of an output shaft of the automatic transmission with respective corresponding critical values; step d) comprising the sub-steps of: e) comparing a timer with a critical time for detecting a fault; step e) comprising the sub-steps of: f) determining that there is a fault in the oil temperature sensor due to a short of the oil temperature sensor or a shut-off of electric power, step f) comprising the sub-steps of: