Method and apparatus for controlling fuel vapor, method and apparatus for diagnosing fuel vapor control apparatus and method and apparatus for controlling air-fuel ratio
US6412477B2 · kind B2 · utility
1Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 2001 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | May 31, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D41/004
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Purge control valves are mounted to purge pipings arranged in parallel for supplying purge gas from a canister to an engine. A flow rate of the purge control valve having a larger flow rate size is controlled in a step mode, and a flow rate equal to or smaller than a variation quantity in said step mode is controlled by the purge control valve having a smaller flow rate size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.