发明名称 |
Fuel vapor leak test system and method comprising successive series of pulse bursts and pressure measurements between bursts |
摘要 |
A leak test system and method for a motor vehicle fuel system. A pump forces air under pressure into vapor containment space. The pump operates in accordance with steps established by a processor. The pump creates superatmospheric pressure in the space during an initial charging phase step, and after completion of that step, the pump performs a measurement phase step that forces pulses of air into the space in a succession of pulse bursts. Each burst contains a succession of individual pulses, preferably in equal numbers, and each successive burst is delayed from an immediately prior burst by a time interval substantially longer than the time intervals between individual pulses in each burst, preferably by constant time intervals. The processor processes data corresponding to a measurement of pressure in the space after the occurrence of at least one of such bursts and as a result indicates leakage from the space.
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申请公布号 |
US2003192365(A1) |
申请公布日期 |
2003.10.16 |
申请号 |
US20020122563 |
申请日期 |
2002.04.15 |
申请人 |
PERRY PAUL D.;RASOKAS RAYMOND |
发明人 |
PERRY PAUL D.;RASOKAS RAYMOND |
分类号 |
F02M25/08;G01M3/04;(IPC1-7):G01M3/04 |
主分类号 |
F02M25/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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