Apparatus and method for detecting abnormal air-fuel ratio variation
US8805609B2 · kind B2 · utility
2Cited by
7References
6Claims
0Family size
Assignee
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Key dates
| Filing date | May 22, 2012 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Jan 23, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/104
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.