Method and system for fuel vapor control
US8215291B2 · kind B2 · utility
17Cited by
30References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2011 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Nov 14, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0818
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method and system for fuel vapor control in a hybrid vehicle (HEV). The HEV fuel vapor recovery system includes a fuel tank isolation valve, which is normally closed to isolate storage of refueling from storage of diurnal vapors. The method for fuel vapor control includes selectively actuating the fuel tank isolation valve during interrelated routines for refueling, fuel vapor purging, and emission system leak detection diagnostics to improve regulation of pressure and vacuum the HEV fuel vapor recovery system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.