Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1997-12-05
1999-02-16
Miller, Carl S.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123516, 137574, F02M 3300
Patent
active
058709975
ABSTRACT:
An evaporative fuel controller for an internal combustion engine having a check valve disposed along a communication passage for closing a refueling vapor control valve during deactivation and activation of the engine except during the supply of fuel to a fuel tank. This eliminates a likelihood of fuel and/or evaporated fuel in the fuel tank flowing into the canister. The result is that the canister can be prevented from being impaired which would otherwise be caused by the aforesaid fuel and/or evaporated fuel, whereby the canister performance can be insured. The evaporative fuel controller has a refueling vapor control valve disposed in the fuel tank. The control valve includes first and second chambers in which the first chamber is partitioned and defined by a diaphragm so as to be communicated to a fuel-feeding pipe in the fuel tank adjacent to the fueling end of the fuel-feeding pipe. The second chamber is partitioned and defined by the diaphragm so as to be communicated to both of the canister and the fuel tank. A communication passage communicates between the first chamber and the canister. A check valve is positioned along the communication passage.
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Miller Carl S.
Suzuki Motor Corporation
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