Fuel system for reducing fuel vapor
US6000426A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 1997 |
| Grant date | Dec 14, 1999 |
| Priority date | — |
| Expiry date | Dec 19, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86372
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A system to collect and control the flow of fuel vapor within a vehicle fuel system. In one embodiment, a vapor control unit mounted in the fuel tank permits fuel vapor to be drawn into a tank fill pipe when liquid fuel is being added to the fuel tank to condense at least a portion of the fuel vapor. In a second embodiment a diaphragm actuated valve permits fuel vapor flow from the fuel tank into the tank fill pipe when liquid fuel is being added to the tank to condense at least a portion of the fuel vapor. By condensing the fuel vapor the system reduces the total amount of fuel vapor within the fuel system while preventing the escape of fuel vapor which is hazardous to the environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.