Title:
EGR温度センサ用高電圧故障識別
Document Type and Number:
Japanese Patent JP2004521215
Kind Code:
A
Abstract:
Systems and methods for discriminating between an EGR temperature sensor fault and actual EGR temperatures which produce similar signals includes suppressing high voltage faults for a calibratible period of time after the engine is started. Alternatively, or in addition, a sensor fault is not indicated unless secondary indicators suggest that EGR temperature is sufficiently different from the EGR temperature corresponding to the sensor signal. Secondary indicators may include signals provided by various other engine and/or vehicle sensors such as an ambient air temperature sensor, engine coolant temperature sensor, oil temperature sensor, or the like.
Inventors:
The Gone Peter
Application Number:
JP2002532786A
Publication Date:
July 15, 2004
Filing Date:
August 22, 2001
Export Citation:
Assignee:
Detroit Diesel Corporation
International Classes:
F02M25/07; F02D41/22; F02D45/00; G01K15/00; F02D41/00; (IPC1-7): F02D45/00; F02M25/07
Attorney, Agent or Firm:
Minoru Nakamura
Fumiaki Otsuka
Sadao Kumakura
Shishido Kaichi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo
Takaki Nishijima
Atsushi Hakoda
Disciple Maru Ken
Fumiaki Otsuka
Sadao Kumakura
Shishido Kaichi
Toshio Imajo
Nobuo Ogawa
Village shrine Atsuo
Takaki Nishijima
Atsushi Hakoda
Disciple Maru Ken