Air-fuel ratio controller

Boots – shoes – and leggings

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Details

123435, 123486, F02D 4126, F02D 4134

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active

050439014

ABSTRACT:
An air-fuel ratio controller, including: fuel injection apparatus to supply an engine with fuel, a quantity of fuel to be delivered by the fuel injection apparatus being controlled by an impressed fuel quantity injection pulse having an injection time width corresponding to a desired fuel quantity; engine status detecting apparatus for detecting a status of at least one of a rotation frequency, intake manifold pressure, and volumetric efficiency operating parameter with respect to an operation of the engine; basic fuel quantity calculating apparatus for calculating a basic fuel quantity according to the status detected by the engine status detecting apparatus; air-fuel ratio sensor apparatus for detecting an air-fuel ratio in an exhaust gas from the engine; proportional integral processing apparatus for integrally processing and calculating an actual fuel quantity according to the output from the air-fuel ratio sensor apparatus; learning apparatus for calculating, using an output from the integral processing apparatus, a learned value to correct the basic fuel quantity into a controlled fuel quantity; learned value correcting apparatus for correcting the basic fuel quantity by using the learned value from the learning apparatus; and, calculation prohibiting apparatus for prohibiting the learning apparatus from calculating until a predetermined time lapses after the engine starts, or until a predetermined time lapses after an engine cooling water temperature is detected to have reached a predetermined temperature level.

REFERENCES:
patent: 4270503 (1981-06-01), Pomerantz
patent: 4348727 (1982-09-01), Kobayashi et al.
patent: 4348728 (1982-09-01), Sagisaka et al.
patent: 4461258 (1984-07-01), Becker et al.
patent: 4572129 (1986-02-01), Otobe
patent: 4705002 (1987-11-01), Ando et al.
patent: 4741312 (1988-05-01), Ohishi
patent: 4850324 (1989-07-01), Furuyama
patent: 4866619 (1989-09-01), Iwaki
patent: 4905155 (1990-02-01), Kanno

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