Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1997-01-16
1998-01-13
Moulis, Thomas N.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
F02M 3302
Patent
active
057067899
ABSTRACT:
A vaporized fuel control apparatus according to the present invention is provided in an internal-combustion engine at least including a plurality of cylinders and each cylinder having a fuel injector, an intake tube mounted to the cylinders, a fuel tank, and a canister connected to the fuel tank. The vaporized fuel control apparatus includes a purge valve and an electronic control unit for controlling the opening/closing of the purge valve. The purge valve is provided in a purge passage connected between the canister and intake tube, the canister being filled by an absorbing material to absorb a fuel vaporized from the fuel tank. The electronic control unit controls an amount of purged gas flowing into the intake tube by controlling the opening/closing timing and the duty ratio of the purge valve in such a way that the purge valve is opened at a timing when a stroke of a particular cylinder reaches the same stroke at a next cycle in synchronization with an engine rotational speed, and an amount of the fuel supplied to the particular cylinder is reduced in accordance with an amount corresponding to an inflow amount of the purged gas.
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Kanehara Kenji
Yamada Jun
Moulis Thomas N.
Nippon Soken Inc.
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