Malfunction judgment system of oil temperature sensor for automatic transmission
First Claim
1. A malfunction judgment system of an oil temperature sensor for detecting a hydraulic oil temperature filled in an automatic transmission of a vehicle which includes a torque converter connected with a power source and a shift gear mechanism connected with the torque converter, comprising;
- malfunction judgment means for receiving an output of the oil temperature sensor to judge a malfunction of the oil temperature sensor where an increase rate of the oil temperature is smaller than a predetermined value in a predetermined period after the vehicle starts running,running condition detecting means for detecting a vehicle running condition,and;
the malfunction judgment means being provided with a plurality of malfunction judgment conditions for judging the malfunction of the oil temperature sensor in accordance with the running condition of the vehicle.
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Accused Products
Abstract
A malfunction judgment system of an oil temperature sensor for detecting a hydraulic oil temperature in an automatic transmission of a vehicle. The system receives an output from the oil temperature sensor to judge a malfunction of the oil temperature sensor when an increase rate of the oil temperature is smaller than a predetermined value in a predetermined time period after the vehicle starts running. A running condition detecting element detects a vehicle running condition. The system further has a plurality of conditions for judging the malfunction of the oil temperature sensor based on the detected running condition of the vehicle and the output of the oil temperature sensor.
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Citations
23 Claims
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1. A malfunction judgment system of an oil temperature sensor for detecting a hydraulic oil temperature filled in an automatic transmission of a vehicle which includes a torque converter connected with a power source and a shift gear mechanism connected with the torque converter, comprising;
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malfunction judgment means for receiving an output of the oil temperature sensor to judge a malfunction of the oil temperature sensor where an increase rate of the oil temperature is smaller than a predetermined value in a predetermined period after the vehicle starts running, running condition detecting means for detecting a vehicle running condition, and; the malfunction judgment means being provided with a plurality of malfunction judgment conditions for judging the malfunction of the oil temperature sensor in accordance with the running condition of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification