Title:
温度センサの故障診断装置
Document Type and Number:
Japanese Patent JP4105086
Kind Code:
B2
Abstract:
A failure diagnosis apparatus for a temperature sensor which detects a temperature that changes depending on an operating condition of an internal combustion engine. Determining that the temperature sensor fails, if the execution condition of the failure determination is satisfied and a temperature difference between the maximum temperature and the minimum temperature detected by the temperature sensor in the determination period, is less than a failure determination threshold value, when the starting of the engine in the preceding engine operation cycle was a cold start. Alternatively, determining that the temperature sensor fails, if the execution condition is satisfied, the temperature difference between the maximum temperature and the minimum temperature is less than the failure determination threshold value, and an engine stop period in the preceding engine operation cycle is longer than a failure determination permission time period, when the starting of the engine in the preceding engine operation cycle was not a cold start.
Inventors:
Gosho Eisaku
Muneki Tsukamoto
Muneki Tsukamoto
Application Number:
JP2003424530A
Publication Date:
June 18, 2008
Filing Date:
December 22, 2003
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
F02D45/00; F02D41/00; F02D41/06; F02D41/22; G01K15/00; G06G7/70; F02D41/04
Domestic Patent References:
| JP2003020988A | ||||
| JP2000303898A | ||||
| JP2000130242A |
Attorney, Agent or Firm:
Koji Arai