Control method and apparatus for combating knocking in internal

Details Control method and apparatus for combating knocking in internal Control method and apparatus for combating knocking in internal

1982-10-21

1985-07-09

Lall, Parshotam S.

Internal-combustion engines

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

123435, F02P 514, F02D 3702

Patent

active

045275254

ABSTRACT:
A control method and apparatus for combating knocking in internal combustion engines which automatically adapts itself to the internal combustion engine to be controlled and, as a result of the automatic adaptation, is capable of employment, without adjustments, on different model-lines and on the individual examples of the internal combustion engines, within these lines and falling within the permissible scatter-range. Anti-knock control is obtained by means of a technique whereby the control input signal (for example, to retard the ignition timing) is increased while knock-signals are occurring, and is reduced if knock-signals do not occur, whereby, following the occurrence of knock-signals, the threshold value for detection of knock-signals is increased, as long as either the knock-signals do not diminish, in spite of the control input signal having been increased, or whereby, if a defined period has elapsed since the last reduction of the control input signal, and knock-signals are not occurring, the threshold value is reduced, or held constant.

REFERENCES:
patent: 4153020 (1979-05-01), King et al.
patent: 4290398 (1981-09-01), Hattori et al.
patent: 4333334 (1982-06-01), Nakajima et al.
patent: 4347820 (1982-09-01), Deleris
patent: 4425891 (1984-01-01), Kashimura et al.

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