Method for the activation of a tank venting valve of a motor vehicle during a leak test
US8616047B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2006 |
| Grant date | Dec 31, 2013 |
| Priority date | — |
| Expiry date | Mar 19, 2029 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M25/0836
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for regulating a fuel tank venting valve of a motor vehicle during leak testing of a fuel tank venting system where the fuel tank venting valve is arranged in a recovery line that connects a retention vessel to catch fuel vapors from a fuel tank to an inlet manifold of an operating internal combustion engine, comprising sealing the tank venting system from the atmosphere outside the motor vehicle, opening the fuel tank venting valve to expose the fuel tank and the tank venting system to a relative negative pressure present in the inlet manifold of the operating internal combustion engine and regulating the degree of opening of the tank venting valve based upon the external pressure, pA.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.