Internal-combustion engines – Combustion chamber means combined with air-fuel mixture...
Patent
1983-05-02
1985-04-23
Cox, Ronald B.
Internal-combustion engines
Combustion chamber means combined with air-fuel mixture...
1231465D, 123632, F02B 504
Patent
active
045123098
ABSTRACT:
A spark control apparatus (1) for an internal combustion engine using a breaker point (3) or solid state (5) ignition to control current to an ignition coil (11). The waveform of the ignition signal from the ignition system is applied to a converter section (35) of the apparatus to convert the signal waveform to a predetermined waveform. A sensor (25) senses engine vibration and generates a representative electrical signal which a signal processor (41) processes to determine engine knock by comparing the peak and average values of the signal. A delay circuit (45) delays termination of current to the ignition coil and thus the ignition timing as a function of the comparison of the peak and average values of the control signal. When there is no knock, the timing slowly returns to normal. A driver (50) responds to current signals to control current to the ignition coil. The driver is shut off when the engine is not running to reduce current drain. A first transistor (Q12) switches on and off when the engine is running and is off when the engine is not running. A second transistor (Q13) turns off the driver when the transistor is on. A controller (Q17, C14, R48 and R49) controls this transistor to turn it on when the engine is not running. The controller responds to changes in operating states of the first transistor to switch the operating state of the second transistor.
REFERENCES:
patent: 3745985 (1973-07-01), Hohne
patent: 3874355 (1975-04-01), Suda
patent: 3937193 (1976-02-01), Kim
patent: 4128091 (1978-12-01), Balan
patent: 4368717 (1983-01-01), Roberts
patent: 4422421 (1983-12-01), Ezoe
ACF Industries Inc.
Cox Ronald B.
Muller J. Joseph
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