Internal-combustion engines – High tension ignition system – Having dwell control
Patent
1981-04-10
1983-08-23
Lall, Parshotam S.
Internal-combustion engines
High tension ignition system
Having dwell control
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.
REFERENCES:
patent: 3807378 (1974-04-01), Wernet, Jr.
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patent: 4231332 (1980-11-01), Wrathall
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patent: 4293814 (1981-10-01), Boyer
patent: 4303977 (1981-12-01), Kobashi et al.
patent: 4309973 (1982-01-01), Tamura
Hosaka Akio
Oshiage Katsunori
Lall Parshotam S.
Nissan Motor Company Limited
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