Method and apparatus for fuel/air mixture adjustment

Details Method and apparatus for fuel/air mixture adjustment Method and apparatus for fuel/air mixture adjustment

1978-01-25

1979-12-18

Myhre, Charles J.

Internal-combustion engines

Noncompression

123119EC, 60285, 60276, F02B 308, F02M 712, F01N 308

Patent

active

041788834

ABSTRACT:
A method and apparatus for adjusting the reference or set-point value which is used in a closed-loop fuel control system for comparison with the actual value signal from an exhaust gas analyzer or sensor. The frequency of amplitude alternations of the sensor signal is a measure of engine speed and gas throughput rate. Accordingly, the invention provides generation of a quasi-D.C. signal whose amplitude is related to the frequency of sensor signal alternations. This signal is then used to change the supply voltage for a voltage-dividing circuit that supplies the reference voltage to the comparator circuit. The invention describes continuous and discrete adjustments of the reference signal.

REFERENCES:
patent: 3911884 (1975-10-01), Moriya et al.
patent: 3963009 (1976-06-01), Mennesson
patent: 4022171 (1977-05-01), Laprade et al.
patent: 4112880 (1978-09-01), Asano et al.

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