Air-fuel ratio controlling device

Details Air-fuel ratio controlling device Air-fuel ratio controlling device

1976-11-18

1978-03-21

Burns, Wendell E.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123 32EE, 123119D, 123124R, F01N 315, F02B 7510, F02M 3700

Patent

active

040797112

ABSTRACT:
In an air-fuel ratio controlling device which comprises an exhaust gas sensor for detecting the air-fuel ratio of mixture and an additional air passage including a bypass valve and disposed to supply additional air to the downstream side of the throttle valve of an engine, the controlling device further comprises a throttle sensor operatively connected to the throttle valve for producing an output signal corresponding to the opening of the throttle valve, and a control circuit responsive to the signal from the throttle sensor whereby a predetermined time period after the occurrence of a change in the opening of the throttle valve is discriminated as the acceleration or deceleration period of the engine and the bypass valve is driven at one or the other of two speed depending on whether the engine is in the accleration/deceleration operating condition or other operating conditions.

REFERENCES:
patent: 3745768 (1973-07-01), Zecanall et al.
patent: 3759232 (1973-08-01), Wahl
patent: 3815561 (1977-06-01), Seitz
patent: 3827237 (1974-08-01), Linder et al.
patent: 3960118 (1976-06-01), Konomi et al.
patent: 3973529 (1976-08-01), Wessell et al.
patent: 4019470 (1977-04-01), Asano
patent: 4020813 (1977-05-01), Hattori et al.
patent: 4029061 (1977-06-01), Asano
patent: 4031866 (1977-06-01), Asano

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