PROBLEM TO BE SOLVED: To provide an oil temperature sensor failure determination device which can implement easily and certainly oil temperature sensor failure determination in the differential gear for a four-wheel drive.SOLUTION: An oil temperature sensor failure determination device 10 for a differential gear comprises differential devices 14, 15 provided between facing front wheels Wfl, Wfr and between facing rear wheels Wrl, Wrr, respectively, an oil temperature sensor 14a which detects the oil temperature of the differential device as a detected oil temperature, a vehicular speed deriving part 11a which derives a vehicular speed, wheel speed deriving parts 17fr, 17fl, 17rr, 17rl which derive wheel speeds of front wheels and rear wheels, an oil temperature acquiring part 331 which stores the detected oil temperature, a front wheel and rear wheel speed difference calculation part 323 which calculates speed difference between the front wheels and the rear wheels, an estimated oil temperature calculation part 324 which calculates an estimated oil temperature of the oil temperature in the differential device based on the speed difference between the front wheels and the rear wheels and the vehicular speed, and a failure determination part 325, 332, 341 which determines presence or absence of an oil sensor failure based on the detected oil temperature detected by the oil temperature sensor and the estimated oil temperature.SELECTED DRAWING: Figure 2
【課題】四輪駆動用差動装置において、油温センサの故障判定を容易かつ確実に実施できる油温センサの故障判定装置を提供する。【解決手段】差動装置用油温センサの故障判定装置10は、対向する前輪Wfl,Wfr間、対向する後輪Wrl,Wrr間に夫々設けられた差動装置14,15と、差動装置の油温を検出油温値として検出する油温センサ14aと、車速を導き出す車速導出部11aと、前後輪の車輪の速度を導き出す車輪速度導出部17fr,17fl,17rr,17rlと、検出油温値を記憶する油温取得部331と、前後車輪速度差を演算する前後車輪速度差演算部323と、前後車輪速度差および車速により差動装置における油温の推定油温値を演算する推定油温演算部324と、油温センサにより検出される検出油温値と推定油温値とに基づいて油温センサの故障の有無を判定する故障判定部325,332,341と、を備える。【選択図】図2
OIL TEMPERATURE SENSOR FAILURE DETERMINATION DEVICE FOR DIFFERENTIAL GEAR OF FOUR-WHEEL DRIVE VEHICLE
四輪駆動車両の差動装置用油温センサの故障判定装置
2017-01-12
Patent
Electronic Resource
Japanese
IPC: | B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES |
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