Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1978-05-18
1980-12-23
Myhre, Charles J.
Internal-combustion engines
Charge forming device
Fuel injection system
123440, F02B 7510
Patent
active
042403898
ABSTRACT:
Disclosed is an air-fuel control device for an internal combustion engine which includes: an O.sub.2 sensor for detecting the oxygen concentration of exhaust gas; a control circuit having a comparator for comparing the output voltage from the O.sub.2 sensor with a reference voltage (V.sub.R), so that the air-fuel ratio of the mixture discriminated as rich or lean with respect to a stoichiometric air-fuel ratio, and; an installation for supplying fuel into an intake passage, so that when the air-fuel ratio of the mixture is leaner than the stoichiometric value the amount of fuel is increased and when the air-fuel ratio of the mixture is richer than the stoichiometric value the amount of fuel is decreased. This device further includes a sensor for detecting the accelerating operating conditions of the engine, and a mechanism for changing the reference voltage (V.sub.R) to a value (V.sub.R2) different from a predetermined value (V.sub.R1) so that the air-fuel ratio of the mixture is changed so as to be richer only when the engine is in the accelerating operating conditions.
REFERENCES:
patent: 3727591 (1973-04-01), Suda
patent: 4064844 (1977-12-01), Matsumoto et al.
patent: 4075982 (1978-02-01), Asano et al.
patent: 4089313 (1978-05-01), Asano et al.
patent: 4109615 (1978-08-01), Asano
patent: 4119072 (1978-10-01), Asano
patent: 4121547 (1978-10-01), Asano
patent: 4129109 (1978-12-01), Matsumoto
patent: 4131089 (1978-12-01), Fujishiro et al.
patent: 4153023 (1979-05-01), Asano et al.
Myhre Charles J.
Nelli Raymond A.
Toyota Jidosha Kogyo Kabushiki Kaisha
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