Ignition energy control method and system

Internal-combustion engines – High tension ignition system – Having dwell control

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Details

123612, 123620, 123417, 123425, F02P 304

Patent

active

043998020

ABSTRACT:
An ignition energy control method and system such that a high ignition energy is supplied to the spark plugs only while the engine is operating under an unstable condition. The unstable engine operating condition is determined by detecting the difference in the maximum engine speed within a predetermined crankshaft revolution angle or by detecting the low-frequency vibration generated by the engine. The ignition energy is controlled by calculating an appropriate pulse-width of an ignition signal or by changing a high voltage generating plasma within the cylinders. The ignition energy control system according to the present invention comprises a crankshaft angle sensor or a low-frequency vibration sensor, a calculating and storing means, and an ignition system including a plasma generating power supply where necessary.

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patent: 4282573 (1981-08-01), Imai et al.
patent: 4293814 (1981-10-01), Boyer
patent: 4303977 (1981-12-01), Kobashi et al.
patent: 4309973 (1982-01-01), Tamura

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