Title:
ABNORMALITY JUDGING DEVICE FOR CAR TEMPERATURE SENSOR
Document Type and Number:
Japanese Patent JP3189701
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To improve decision precision by employing an abnormality judging logic wherein a temperature sensor, which displays a detected temperature in a normal area, is judged abnormal when it does not correctly detect temperature rising, so that an erroneous detection is avoided when the temperature sensor becomes out of order while containing a resistance value corresponding to the temperature in normal area.
SOLUTION: An abnormality judging device 11 is applied with an oil temperature Tat, a throttle open-degree Tvo, an engine rotation speed Ne, and a car speed V from an oil temperature sensor 12, a throttle open-degree sensor 13, an engine rotation speed sensor 14, and a car speed sensor 15, respectively. A lapse of time is measured in which a working oil temperature Tat of an automatic transmission is continuously contained in any one of temperature zones which is formed by dividing a temperature zone which is lower than a normal zone in temperature set for oil temperature, and, when a measured lapse of time reaches a specified time, it is judged that an abnormality exists with the oil temperature sensor, to actuate an alarming device 22.
Inventors:
Shigeru Ishii
Shinso Yoshihide
Shinso Yoshihide
Application Number:
JP26302896A
Publication Date:
July 16, 2001
Filing Date:
October 03, 1996
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
G01K3/10; B60R16/02; F15B20/00; F16H61/12; G01K15/00; G05B9/02; G05B23/02; G08B21/00; (IPC1-7): G01K3/10; F15B20/00; F16H61/12
Domestic Patent References:
| JP7301315A | ||||
| JP242245A |
Attorney, Agent or Firm:
Akihide Sugimura (6 others)
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