Internal-combustion engines – Charge forming device – Having fuel vapor recovery and storage system
Patent
1992-08-18
1993-08-24
Miller, Carl S.
Internal-combustion engines
Charge forming device
Having fuel vapor recovery and storage system
123516, F02M 3302
Patent
active
052379795
ABSTRACT:
An evaporative fuel control system able to control an air-fuel ratio of an engine to be a stoichiometric air-fuel ratio while a purge of evaporative fuel is executed The system comprises a microcomputer for computing a target flow amount of evaporative fuel gas to be purged into an intake line via a solenoid valve in accordance with signals from a volume detecting sensor, a fuel temperature detecting sensor, and an air flow detecting sensor; the micro computer also serving for computing a fuel vapor amount contained in the target flow amount. An air flow amount contained in the target flow amount of evaporative fuel gas purged into the intake line is computed by the microcomputer in accordance with the fuel vapor amount therein. A correction amount of fuel to be injected into the intake line is controlled so as to obtain a stoichiometric air-fuel ratio in various conditions of the engine.
REFERENCES:
patent: 4664087 (1987-05-01), Hamburg
patent: 4962744 (1990-10-01), Uranishi
patent: 5146402 (1992-09-01), Cook
patent: 5158059 (1992-10-01), Kuroda
patent: 5186153 (1993-02-01), Steinbrenner
Hyodo Yoshihiko
Itou Takaaki
Kidokoro Toru
Osanai Akinori
Miller Carl S.
Toyota Jidosha & Kabushiki Kaisha
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