Title:
EXHAUST EMISSION CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP2008038661
Kind Code:
A
Abstract:
To keep measuring accuracy of a differential pressure sensor high for measuring a fore-and-aft differential pressure of a particulate filter.
The present invention corrects output gain of the differential pressure sensor, based on a specified difference width, by specifying the difference width of the output gain by discriminating whether the output gain of the differential pressure sensor is different from a normal value, by comparing a measured value of the differential pressure sensor with predetermined reference differential pressure when operating an engine after oxidizing and removing PM collected to the particulate filter, for solving the above problem.
Inventors:
HASHIZUME TAKESHI
Application Number:
JP2006211177A
Publication Date:
February 21, 2008
Filing Date:
August 02, 2006
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F01N3/02; F01N3/20; F02D45/00
Attorney, Agent or Firm:
Yoshiyuki Kawaguchi
Mayuko Wakuda
Kazunobu Sera
Tsutomu Toyama
Takehiko Sekine
Mayuko Wakuda
Kazunobu Sera
Tsutomu Toyama
Takehiko Sekine