Failure diagnosis apparatus for evaporative fuel processing system
US7040302B2 · kind B2 · utility
4Cited by
5References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 2004 |
| Grant date | May 9, 2006 |
| Priority date | — |
| Expiry date | May 14, 2024 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0827
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A failure diagnosis apparatus for diagnosing a failure of an evaporative fuel processing system. A pressure in the evaporative fuel processing system is detected, and a purge control valve and a vent shut valve are closed when stoppage of the engine is detected. A determination is made as to whether there is a leak in the evaporative fuel processing system based on the detected pressure during a predetermined determination period after closing of the purge control and vent shut valves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.