Internal-combustion engines – Charge forming device – Fuel injection system
Patent
1977-09-23
1980-07-29
Hecker, Stuart N.
Internal-combustion engines
Charge forming device
Fuel injection system
123437, F02B 300
Patent
active
042145589
ABSTRACT:
A fuel control system for an internal combustion engine includes an exhaust gas sensor from which feedback control signal is derived, a limiter for limiting the maximum and minimum voltages of the control signal and a triangular wave generator. The triangular wave has a constant amplitude peak of which the maximum value is slightly greater than the maximum voltage of the control signal and the minimum value is slightly below the minimum voltage of the control signal. A comparator is provided to produce an output at one of two binary levels depending upon whether the control signal is above or below the instantaneous value of the triangular wave. The output from the comparator is a train of pulses whose duty cycle ranges from predetermined minimum to maximum values which correspond respectively to the minimum open and closure times of air-fuel mixing control valves.
REFERENCES:
patent: 3998189 (1976-12-01), Aoki
patent: 4019470 (1977-04-01), Asano
patent: 4022171 (1977-05-01), Laprade
patent: 4046118 (1977-09-01), Aono
patent: 4061117 (1977-12-01), Ikeura
patent: 4131089 (1978-12-01), Fujishiro
Anzai Makoto
Asano Masaharu
Hosaka Akio
Nishioka Tetsuji
Faber Alan
Hecker Stuart N.
Nissan Motor Company Limited
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