Fuel tank pressure control system
US6422214B1 · kind B1 · utility
12Cited by
21References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 15, 2000 |
| Grant date | Jul 23, 2002 |
| Priority date | — |
| Expiry date | Aug 15, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/703
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method is presented for controlling fuel tank pressure in an internal combustion engine. The engine, the fuel tank and the carbon canister are connected in a three-way connection. The engine can be selectively isolated by a purge control valve, and the fuel tank can be selectively isolated by a fuel tank control valve. The operation of both valves is coordinated by an electronic engine controller. By isolating the fuel tank during the carbon canister purge, better estimate of the fuel fraction flowing into the engine can be achieved, thereby improving fuel economy.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.