Fuel vapor purging diagnostics
US7900608B2 · kind B2 · utility
9Cited by
25References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2010 |
| Grant date | Mar 8, 2011 |
| Priority date | — |
| Expiry date | Oct 7, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0836
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Systems and methods are provided for monitoring reverse flow of fuel vapors and/or air through a vehicle fuel vapor recovery system, said fuel vapor recovery system coupled to an engine intake of a boosted internal combustion engine. One example method comprises, during boost, when the fuel vapor recovery system is commanded to be sealed from the intake, indicating degradation based on a pressure value at a venturi in the fuel vapor recovery system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.