Knock control apparatus and method for internal combustion engin

Internal-combustion engines – Combustion chamber means combined with air-fuel mixture...

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73 35, F02P 514

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active

047701447

ABSTRACT:
A knock control apparatus for an internal combustion engine which prevents variation of a control knock sound even if an output of a knock sensor is varied due to the variations in performance among different engines or knock sensors, aging of the engine or knock sensor or the like. A given correction quantity is added to an average value of an output signal of the knock sensor, and the sum is increased K times by a K-value varying with the operating conditions of the engine, thereby generating a knock discrimination level. In accordance with the presence or absence of knocking determined by comparing the knock discrimination level and an output signal of the knock sensor, a knock control factor, e.g., ignition timing, supercharge pressure or the like of the engine is controlled.

REFERENCES:
patent: 4423621 (1984-01-01), Kenichi et al.
patent: 4498331 (1985-02-01), Nakamura et al.
patent: 4675821 (1987-06-01), Aoki et al.

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