Ignition timing control apparatus for internal combustion engine

Details Ignition timing control apparatus for internal combustion engine Ignition timing control apparatus for internal combustion engine

1979-02-28

1980-12-02

Lall, P. S.

Internal-combustion engines

Intake manifold

Manifold tuning, balancing or pressure regulating means

123117R, 123119ED, F02P 514, F02P 308

Patent

active

042364914

ABSTRACT:
An ignition timing control apparatus for an internal combustion engine detects the rotational angle and intake vacuum of the engine to control the ignition timing of the engine in accordance with the computation of computing means on the detected signals, and on the other hand the vibration of the engine is detected to detect the occurrence of knock and thereby to correct the ignition timing in response to the detection of knock. The control apparatus includes a vibration detector for detecting the vibration of the engine, and a knock control circuit for detecting the occurrence of knock when the ratio between the average value of the outputs of the vibration detector during a predetermined angle or a predetermined time interval before the maximum engine cylinder pressure value and that of the vibration detector during a predetermined angle or a predetermined time interval after the maximum engine cylinder pressure value, and the ignition timing of the engine is retarded in response to the occurrence of knock.

REFERENCES:
patent: 2220558 (1940-11-01), Van Dijck et al.
patent: 3972310 (1976-08-01), Gambill
patent: 4002155 (1977-01-01), Harned et al.
patent: 4044236 (1977-08-01), Bianchi et al.
patent: 4054111 (1977-10-01), Sand
patent: 4106447 (1978-08-01), West
patent: 4120272 (1978-10-01), Douaud et al.
patent: 4133475 (1979-01-01), Harned et al.
patent: 4153020 (1979-05-01), King et al.
patent: 4161162 (1979-07-01), Latsch et al.

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