Device for preventing outflow of a fuel vapor from a fuel tank
US4872439A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 1, 1988 |
| Grant date | Oct 10, 1989 |
| Priority date | — |
| Expiry date | Feb 1, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86332
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A device for preventing an outflow of a fuel vapor from a fuel tank comprising a breather pipe which connects the upper interior of the fuel tank to a charcoal canister. A float-valve assembly is mounted on the upper wall of the fuel tank. This assembly comprises a breather passage connected to the charcoal canister via the breather pipe, a normally closed solenoid valve arranged in the breather passage, and a float normally allowing the breather passage to be open to the interior of the fuel tank. When the replenishment of the fuel tank is carried out, the solenoid valve is opened to feed fuel vapor in the fuel tank into the charcoal canister.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.