Vehicle fuel gas supply system
US6401698B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2000 |
| Grant date | Jun 11, 2002 |
| Priority date | — |
| Expiry date | Mar 16, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A vehicle fuel gas supply system includes, a fuel line supplying a fuel gas to a gas engine, a shut-off valve and a pressure sensor disposed on said fuel line, and a control section. The pressure sensor is disposed closer to the gas engine in comparison with the shut-off valve. The control section closes the shut-off valve based on a failure diagnostic signal, calculates a pressure drop rate based on pressure information taken in from the pressure sensor after the closure of the shut-off valve and an elapsed time, and judges that the shut-off valve is in a failure state when the pressure drop rate so calculated is smaller than a predetermined pressure drop rate threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.