Invention Grant
US08805609B2 Apparatus and method for detecting abnormal air-fuel ratio variation
有权
用于检测异常空燃比变化的装置和方法
- Patent Title: Apparatus and method for detecting abnormal air-fuel ratio variation
- Patent Title (中): 用于检测异常空燃比变化的装置和方法
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Application No.: US13477647Application Date: 2012-05-22
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Publication No.: US08805609B2Publication Date: 2014-08-12
- Inventor: Hitoshi Tanaka , Isao Nakajima , Toshihiro Kato , Takefumi Uchida , Yoshihisa Oda
- Applicant: Hitoshi Tanaka , Isao Nakajima , Toshihiro Kato , Takefumi Uchida , Yoshihisa Oda
- Applicant Address: JP Toyota-shi
- Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee: Toyota Jidosha Kabushiki Kaisha
- Current Assignee Address: JP Toyota-shi
- Agency: Gifford, Krass, Sprinkle, Anderson & Citkowski, P.C.
- Priority: JP2011-114731 20110523
- Main IPC: F02D41/14
- IPC: F02D41/14 ; G01M15/00
Abstract:
An apparatus for detecting an abnormal air-fuel ratio variation, includes an abnormality detecting unit that detects an abnormal variation in each of a plurality of fuel injection valves on the basis of an injection ratio between the plurality of fuel injection valves, a fluctuation in the output before the injection ratio is changed and the fluctuation in the output after the injection ratio is changed; and a setting unit that corrects the abnormality determination threshold for each of the plurality of fuel injection valves on the basis of the injection ratio.
Public/Granted literature
- US20120297866A1 APPARATUS AND METHOD FOR DETECTING ABNORMAL AIR-FUEL RATIO VARIATION Public/Granted day:2012-11-29
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