Malfunction judgment system of oil temperature sensor for automa

Details Malfunction judgment system of oil temperature sensor for automa Malfunction judgment system of oil temperature sensor for automa

1997-06-10

1998-11-03

Wright, Dirk

Interrelated power delivery controls, including engine control

Transmission control

Control by sensed ambient condition, pattern indicia,...

477906, E16H 6100

Patent

active

058301062

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.

REFERENCES:
patent: 4807405 (1989-02-01), Wallace
patent: 4914982 (1990-04-01), Ito et al.
patent: 5601511 (1997-02-01), Michioka

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