Internal-combustion engines – Noncompression
Patent
1975-10-20
1976-12-21
Cox, Ronald B.
Internal-combustion engines
Noncompression
60276, 431 90, F02D 300
Patent
active
039981894
ABSTRACT:
A feedback air-fuel ratio regulator comprises an air-fuel ratio sensor which determines air-fuel ratio of the combustible gas from the composition of its exhaust gas and produces a sudden change in its output at a preset theoretical air-fuel ratio and an electronic air-fuel ratio controlling circuit. The latter includes voltage detectors for detecting the output voltage of the air-fuel ratio sensor at two or more points corresponding to certain richer and leaner air-fuel ratios than the theoretical one. Switching means are actuated by the output combined by the voltage detectors. An integrating circuits has a time constant which is determined by a condenser and resistance selected by the switching means, whereby the amount of fuel to be injected is regulated by the time constant which is determined by the output of integrating circuit according to said output voltage.
REFERENCES:
patent: 3738341 (1973-06-01), Loos
patent: 3745768 (1973-07-01), Zechwall
patent: 3782347 (1974-01-01), Schmidt
patent: 3895611 (1975-07-01), Endo
patent: 3910240 (1975-10-01), Omori
Cox Ronald B.
Toyota Jidosha Kogyo Kabushiki Kaisha
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