Ignition timing retard angle control apparatus for internal comb

Details Ignition timing retard angle control apparatus for internal comb Ignition timing retard angle control apparatus for internal comb

1980-11-28

1985-01-29

Argenbright, Tony M.

Internal-combustion engines

Combustion chamber means combined with air-fuel mixture...

73 35, F02P 504

Patent

active

044959184

ABSTRACT:
An ignition retard angle control apparatus for an internal combustion engine is disclosed. This control system comprises a vibration sensor for detecting engine vibrations, a filter for discriminating part of the output of the sensor in a characteristic frequency range where a knock-induced vibration component appears remarkably when a knock is generated, an amplifier for amplifying the output signal of the filter, an averaging/amplifying device for macroscopically averaging and amplifying the output signal of the filter, a comparator for comparing the output of the amplifier with those of the averaging/amplifying device and producing an output signal when the former is larger than the latter, an engine rpm detector for detecting the engine speed, and a voltage signal generator circuit responsive to the output signals of the comparator and the engine rpm detector and having an output of an amplitude corresponding to the ignition advance angle determined in accordance with the engine rpm, the voltage signal generator circuit changing the amplitude of the output voltage thereof in a manner to retard the ignition advance angle by a predetermined amount in response to an output signal of the comparator.

REFERENCES:
patent: 4002155 (1977-01-01), Harned et al.
patent: 4111035 (1978-09-01), West et al.
patent: 4423621 (1984-01-01), Kenichi

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