| 发明名称 |
FUEL SYSTEM LEAK DETECTION USING PASSIVE VALVES |
| 摘要 |
Methods and systems for fuel system leak detection using passive canister vent valves are disclosed. In one example approach, a method comprises generating engine off vacuum or pressure in a fuel system for leak diagnostics, where the pressure and vacuum are held via first and second mechanical relief valves positioned in parallel with one another and without a valve holding current. |
| 申请公布号 |
US2014260549(A1) |
申请公布日期 |
2014.09.18 |
| 申请号 |
US201313841414 |
申请日期 |
2013.03.15 |
| 申请人 |
FORD GLOBAL TECHNOLOGIES, LLC |
发明人 |
Dudar Aed M.;Jentz Robert Roy;Peters Mark W. |
| 分类号 |
G01M3/02 |
主分类号 |
G01M3/02 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for a vehicle with an engine, comprising:
generating engine off vacuum or pressure in a fuel system for leak diagnostics, the pressure and vacuum held via first and second mechanical relief valves positioned in parallel with one another and without a valve holding current. |
| 地址 |
Dearborn MI US |
