Internal-combustion engines – Combustion chamber means combined with air-fuel mixture...
Patent
1981-12-03
1983-12-27
Argenbright, Tony M.
Internal-combustion engines
Combustion chamber means combined with air-fuel mixture...
F02P 504
Patent
active
044224222
ABSTRACT:
A closed loop knock control system integrates a knock signal comprising knock intensity indicating knock pulses from an engine mounted knock sensor into a retard voltage in an integrating amplifier normally provided with a fixed reference voltage through a series pair of resistors. The junction of the series pair of resistors is connected through another resistor and a semiconductor switch, when the switch is actuated, to a second constant reference voltage greater in the retard direction than the first. An open loop knock anticipating system responds to a detected knock anticipating event by actuating the semiconductor switch means for a predetermined time duration to produce a step change in the retard direction for the predetermined time duration in the retard voltage and thus in the spark timing. If voltage limiting means is provided in the closed loop system for the output of the integrator, the summed combination of the closed and open loop retard voltages is also limited thereby.
REFERENCES:
patent: 4344400 (1982-08-01), Asano
patent: 4357918 (1982-11-01), Asano
patent: 4370963 (1983-02-01), Iwata et al.
Mowery Kenneth D.
Pechous L. Joseph
Argenbright Tony M.
General Motors Corporation
Sigler Robert M.
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