Air/fuel ratio control system having an evaporated fuel purging

Internal-combustion engines – Charge forming device – Having fluidic logic control means

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Details

123520, 123179G, F02M 724, F02M 3302

Patent

active

043771424

ABSTRACT:
An air/fuel ratio control system for performing feedback control of the air/fuel ratio of an air/fuel mixture being supplied to an internal combustion engine. The air/fuel ratio control system is provided with an evaporated fuel purging control arrangement which is adapted to use an engine cooling water temperature sensor as an engine temperature sensor for control of purging of evaporated fuel from a canister to a venturi of the engine. At the same time, the above sensor is used for detection of various engine operating conditions for control of the air/fuel ratio of the mixture and adapted to produce an output continuously variable with a change in the temperature of engine coolant. The preclusion of the use of a special temperature sensor simplifies the structure of the evaporated fuel purging arrangement.

REFERENCES:
patent: 3680318 (1972-08-01), Nakajima et al.
patent: 4046118 (1977-09-01), Aono
patent: 4109615 (1978-08-01), Asano
patent: 4291659 (1981-09-01), Suzuki et al.
patent: 4308842 (1982-01-01), Watanabe et al.
patent: 4318383 (1982-03-01), Iritani et al.

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