Abnormality diagnosis apparatus for internal combustion engine
US8225647B2 · kind B2 · utility
15Cited by
3References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 17, 2009 |
| Grant date | Jul 24, 2012 |
| Priority date | — |
| Expiry date | Sep 3, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An alcohol concentration sensor detecting alcohol concentration of fuel is provided in a fuel tank or a fuel passage. An alcohol concentration detected at a previous driving of an engine is stored in a backup RAM. When a current alcohol concentration is different from the previous alcohol concentration, a procedure of an abnormality diagnosis is prohibited or invalidated until all of the fuel remaining in the fuel passage is consumed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.