Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Reexamination Certificate
2005-10-11
2005-10-11
Lo, Weilun (Department: 3747)
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
C123S516000, C123S518000, C123S1980DA, C073S118040, C073S049200, C073S049700, C137S493900, C137S852000, C137S859000
Reexamination Certificate
active
06953027
ABSTRACT:
A fuel vapor pressure management apparatus for a fuel system performs leak detection on a headspace of the fuel system, performs excess negative pressure relief of the headspace, and performs excess positive pressure relief of the headspace. The fuel vapor pressure management apparatus includes a diaphragm that is deformable between a nearly undeformed configuration that is associated with performing leak detection, a first deformed configuration that is associated with performing excess negative pressure relief, and a second deformed configuration that is associated with performing excess positive pressure relief. A first fluid flow through the diaphragm occurs when the diaphragm is in the first deformed configuration. A second fluid flow through the diaphragm occurs when the diaphragm is in the second deformed configuration, and the second fluid flow is opposite to the first fluid flow. And the diaphragm in the nearly undeformed configuration prevents fluid flow through the fuel vapor pressure management apparatus.
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Lo Weilun
Siemens VDO Automotive Inc.
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