Evaporative emission control system
US6367457B1 · kind B1 · utility
12Cited by
13References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 2000 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | May 13, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0836
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An evaporative emission control system for an internal combustion engine isolates the fuel tank from the engine during purging of a carbon canister used to store fuel vapor drawn from the fuel tank during refueling. The flow of vapor from the tank to the canister is controlled by a main vapor control valve, and the flow of vapor from the canister to the engine is controlled by a purge valve. Pressure transducers are used to independently sense vapor pressure in the tank and in the canister. An electronic controller operates the valves based in part on the pressure information generated by the pressure transducers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.