Method for diagnosis of a tank ventilation valve based on pressure oscillations
US10598132B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 2017 |
| Grant date | Mar 24, 2020 |
| Priority date | — |
| Expiry date | Apr 10, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M35/1038
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for diagnosis of a tank ventilation valve in a tank ventilation system for an internal combustion engine of a motor vehicle includes actuating a tank ventilation valve via a control unit, and checking the functionality of the tank ventilation valve in a manner dependent on a pressure oscillation measured by the pressure sensor. The tank ventilation system includes a filter having a first feed line from a fuel tank, a second feed line with a connection to a surrounding atmosphere, and a third feed line to a tank ventilation valve, wherein the tank ventilation valve has a connection to two different introduction points at an intake pipe, wherein the connection has a first line system and a second line system, wherein the tank ventilation system further includes at least one pressure sensor installed in the second line system between tank ventilation valve and intake pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.