Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1995-05-04
1996-08-06
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
F02M 2508
Patent
active
055423973
ABSTRACT:
A first passage provided with a first valve for guiding vaporized fuel from a fuel tank into a canister, and a second passage provided with a second valve connecting this canister with an intake pipe downstream or a throttle, are provided. A pressure detecting mechanism is provided between this first valve and second valve, and a third valve is provided for leading fresh air into the canister. When the engine running condition satisfies a predetermined positive pressure test condition, the second and third valves are closed and the first valve is opened. In this state, the presence or absence of a leak is determined from the pressure detected by the pressure detecting mechanism. In other words, it is determined for example that the fuel tank has no leak if the pressure rises above a predetermined value.
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Gotoh Kenichi
Iochi Atsushi
Kuriki Hiroshi
Nakazawa Shinsuke
Takahata Toshio
Moulis Thomas N.
Nissan Motor Co,. Ltd.
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