Title:
内燃機関の制御装置
Document Type and Number:
Japanese Patent JP6379683
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To accurately execute air-fuel ratio sensor failure determination.SOLUTION: If rich peak timing and lean peak timing of an exhaust gas air-fuel ratio detected during implementation of an active pulse fall in a range within ±90degCA with respect to a predetermined central value, and an exhaust air-fuel ratio amplitude (A/F amplitude) detected during implementation of the active pulse is equal to or higher than a predetermined amplitude determination threshold, a control unit determines that a first air-fuel ratio sensor is normal. If any of the rich peak timing and the lean peak timing is out of the range within ±90degCA with respect to the predetermined central value or the A/F amplitude is lower than the predetermined amplitude determination threshold, the control unit determines that the first air-fuel ratio sensor is abnormal.
Inventors:
Amauchi General
Shota Horiguchi
Shota Horiguchi
Application Number:
JP2014113663A
Publication Date:
August 29, 2018
Filing Date:
June 02, 2014
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
F02D41/22
Domestic Patent References:
| JP2014013017A | ||||
| JP2005307961A | ||||
| JP2013194685A |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Tomioka Kiyoshi
Tsuyoshi Hashimoto
Tomioka Kiyoshi
Tsuyoshi Hashimoto