Method of and system for lean-controlling air-fuel ratio in elec

Details Method of and system for lean-controlling air-fuel ratio in elec Method of and system for lean-controlling air-fuel ratio in elec

1983-12-28

1985-07-16

Lall, Parshotam S.

Internal-combustion engines

Charge forming device

Fuel injection system

123480, 123491, F02M 5100

Patent

active

045289611

ABSTRACT:
In a method of and system for lean-controlling an air-fuel ratio in an electronically controlled engine, wherein the air-fuel ratio is feedback-controlled to the lean side from the stoichiometric air-fuel ratio in accordance with an output from a lean sensor generating an output signal substantially proportional to the concentration of oxygen in the exhaust gas, when it is necessary to vary a target air-fuel ratio, a target control value of an output from the lean sensor is corrected in accordance with the required variation value and the air-fuel ratio is feedback-controlled whereby the output from the lean sensor can become the corrected target control value, so that satisfactory feedback control of the air-fuel ratio can be effected even when the target air-fuel ratio is varied to a value other than the normal value.

REFERENCES:
patent: 4356065 (1982-10-01), Dietz
patent: 4373187 (1983-02-01), Ishii et al.
patent: 4392471 (1983-07-01), Miyagi et al.
patent: 4398514 (1983-08-01), Nakamura
patent: 4416237 (1983-11-01), Aoki et al.

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