External fuel vapor emission adjusting device for fuel tank
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United States of America Patent
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-
Nov 10, 2009
Grant Date -
Nov 20, 2008
app pub date -
Jul 2, 2007
filing date -
May 17, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A fuel vapor adjusting device includes an expansion chamber at a top portion of a fuel tank; an oil spill trip valve being connected to the expansion chamber, which can turn off when there's spilling oil or the fuel tank is fell down; and at least two canisters. Each canister includes a fuel vapor entrance port, a fuel vapor outlet port, and a fuel vapor recycling vent. The fuel vapor entrance port and the fuel vapor outlet port form a fuel vapor filtering passage, and the fuel vapor entrance port and the fuel vapor recycling vent form a fuel vapor recycling passage. The oil spill trip valve, the at least two fuel vapor filtering passages connect in series, and the oil spill trip valve, the at least two fuel vapor recycling passages connect in parallel.
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