Fuel tank pressure control system
US6382191B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2000 |
| Grant date | May 7, 2002 |
| Priority date | — |
| Expiry date | Aug 12, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- 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, vapor spikes into the engine are eliminated, thus preventing engine stalls. Also, canister durability is improved by continuously storing and purging vapors in opposite directions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.