Knock control with AGC having reduced knock dependence

摘要: A knock control for a spark ignited, internal combustion engine including an AGC amplifier in which the amplified sensor signal is demodulated, processed and compared to fixed reference level generate pulsed signal. An error generated from difference between input comparator desired voltage level; integrated create The integration rate decreased during each indicating pulse of output reduce effect on thus stabilize control. In particular, current signal; integrator includes series impedance with bypassing switch controlled by force through only pulses.