Method for checking the tightness of a fuel supply system
US10626826B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2018 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Oct 18, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M15/09
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for checking the tightness of a fuel supply system of a motor vehicle is provided. The fuel supply system includes a volume-changing element, which is provided in the fuel tank and the volume of which is connected to the environment. The fuel tank is typically closed off from the environment by way of a valve unit. For tightness testing, a differential pressure with respect to the environment is produced in the tank interior by way of a gas-conveying device while the volume change element is connected to the environment. The differential pressure is held by switching a suitable shut-off valve and is monitored over a certain time span or checked after a certain time span. Sufficient tightness of the fuel supply system is inferred if the differential pressure still exceeds a certain threshold value after the time span.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.