Air/fuel ratio control system for internal combustion engines, h

Details Air/fuel ratio control system for internal combustion engines, h Air/fuel ratio control system for internal combustion engines, h

1981-10-05

1983-08-23

Lall, Parshotam S.

Internal-combustion engines

Charge forming device

Fuel injection system

123440, 123491, F02M 700

Patent

active

043997929

ABSTRACT:
An air/fuel ratio control system for use in an internal combustion engine, which is adapted to initiate air/fuel ratio control upon concurrent fulfillment of a first condition that a first predetermined period of time which is provided as a period of time from the start of the engine to the warming-up of the engine is determined in dependence on the engine temperature available at the start of the engine by means of a first timer circuit and the first timer circuit finishes counting the first predetermined period of time, and a second condition that a second timer circuit finishes counting a second predetermined period of time after the internal resistance of an O.sub.2 sensor for detecting the oxygen concentration in the engine exhaust gases has dropped below a predetermined value.

REFERENCES:
patent: 4244340 (1981-01-01), Herth et al.
patent: 4276600 (1981-06-01), Hartford et al.
patent: 4307694 (1981-12-01), Jacobs
patent: 4337745 (1982-07-01), Pomerantz
patent: 4364356 (1982-12-01), Gerhold

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