Method and circuit for controlling the air-fuel ratio of an inte

Details Method and circuit for controlling the air-fuel ratio of an inte Method and circuit for controlling the air-fuel ratio of an inte

1988-06-13

1990-03-06

Dolinar, Andrew M.

Internal-combustion engines

Charge forming device

Having fluidic logic control means

F02D 4114

Patent

active

049056506

ABSTRACT:
In a method for controlling the air-fuel ratio of an internal combustion engine in which the output voltage of an oxygen measurement probe which is arranged in the exhaust gas duct of the internal combustion engine is fed to a controller and the controller gives off a correcting variable for the air-fuel ratio, signals corresponding to the load and the speed of rotation of the internal combustion engine are furthermore fed to the controller. After each jump in the output voltage of the oxygen measurement probe there take place a first jump followed by, in each case, successive further jumps in the correcting variable. The direction of the jumps depends on the direction of the jump of the output voltage of the oxygen measurement probe while the amplitude of the further jumps is dependent on the load and the speed of rotation. Between the jumps, the correcting variable has a course which is substantially linear with time, the slope being predetermined and the direction corresponding to the direction of the jumps.

REFERENCES:
patent: 4029061 (1977-06-01), Asano
patent: 4461258 (1984-07-01), Becker et al.
patent: 4603670 (1986-08-01), Bertsch et al.
Patent Abstracts of Japan, vol. 6, No. 216 (M-168)[1094], 29 Oct. 1982 to JP-A-57-122145.

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