Air-fuel ratio control system for internal combustion engines

Details Air-fuel ratio control system for internal combustion engines Air-fuel ratio control system for internal combustion engines

1983-01-20

1984-10-23

Lall, Parshotam S.

Internal-combustion engines

Charge forming device

Fuel injection system

123589, 123480, F02M 5100

Patent

active

044781920

ABSTRACT:
An air-fuel ratio control system for engines comprises a control unit by which the air-fuel ratio is maintained constant to enrich the mixture gas for a first predetermined time length after the detection of an engine heavy load condition, the air-fuel ratio is controlled as predetermined on the basis of an oxygen detection signal for a second predetermined time length after the lapse of the first predetermined time length, and the air-fuel ratio is restored to the constant value thereby to enrich the mixture gas after the lapse of the second predetermined time length.

REFERENCES:
patent: 4052968 (1975-08-01), Hattori et al.
patent: 4079711 (1978-03-01), Hattori et al.
patent: 4140093 (1979-02-01), Hattori et al.
patent: 4237838 (1980-12-01), Kinugawa et al.
patent: 4248196 (1981-02-01), Toelle
patent: 4354238 (1982-10-01), Manaka et al.

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