| 发明名称 |
SYSTEMS AND METHODS FOR ENGINE-OFF NATURAL VACUUM LEAK TESTING |
| 摘要 |
A method is provided, comprising terminating a pressure rise portion of an engine-off natural vacuum test based on an initial rate of change of a fuel system pressure upon sealing a fuel system; and initiating a vacuum portion of the engine-off natural vacuum test responsive to suspending the pressure rise portion. The initial rate of change may indicate a likelihood of the pressure rise portion reaching a pressure rise threshold. In this way, the vacuum portion of the test may be initiated earlier, increasing the likelihood of a conclusive result being obtained during a test time limit. |
| 申请公布号 |
US2016186695(A1) |
申请公布日期 |
2016.06.30 |
| 申请号 |
US201514687792 |
申请日期 |
2015.04.15 |
| 申请人 |
Ford Global Technologies, LLC |
发明人 |
Dudar Aed M.;Liu Chingpo;Yang Dennis Seung-Man;Jentz Robert Roy;Tseng Fling Finn;Makki Imad Hassan;Pearce Russell Randall |
| 分类号 |
F02M25/08 |
主分类号 |
F02M25/08 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method, comprising:
terminating a pressure rise portion of an engine-off natural vacuum test based on an initial rate of change of a fuel system pressure upon sealing a fuel system; and initiating a vacuum portion of the engine-off natural vacuum test responsive to suspending the pressure rise portion. |
| 地址 |
Dearborn MI US |
