Fuel vapor detection system for vehicles
US7562559B2 · kind B2 · utility
12Cited by
17References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2006 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | May 10, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/62
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An electric motor or generator is used to spin the vehicle's internal combustion engine while the engine is not running, in order to draw a vacuum within the vapor control system. Vacuum bleed off is then monitored to determine if an unacceptable condition in the control system may exist. The evaporative fuel emissions test may be conducted either while the vehicle is at rest or while under way in an electric drive mode of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.