Internal-combustion engines – Combustion chamber means combined with air-fuel mixture...
Patent
1984-03-12
1985-12-17
Cox, Ronald B.
Internal-combustion engines
Combustion chamber means combined with air-fuel mixture...
123412, F02P 504
Patent
active
045586748
ABSTRACT:
A knock control apparatus equipped with an altitude compensation function is disclosed. The apparatus comprises a knock sensor fitted to an internal combustion engine and detecting the mechanical oscillation of the engine; a background signal detection circuit discriminating the background level signal of the knock signal from the output signal of the knock sensor; a comparator for comparing the output signal of the knock sensor with the background signal and detecting knock and the intensity of knock; and a knock control circuit sequentially advancing the ignition timing of the internal combustion engine towards the maximum advance angle position and retarding the ignition timing in accordance with the occurrence of knock and its intensity so as to control and optimize the ignition timing of the engine. The knock control apparatus further includes an atmospheric pressure sensor and changes the maximum advance angle position of the ignition timing in accordance with the output signal of this atmospheric pressure sensor.
REFERENCES:
patent: 4002155 (1977-01-01), Harned
patent: 4106447 (1978-08-01), West
patent: 4133475 (1979-01-01), Harned
patent: 4175520 (1979-11-01), Russell
Okado Terumi
Sugiura Noboru
Cox Ronald B.
Hitachi , Ltd.
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