Ignition system for internal combustion engine

Details Ignition system for internal combustion engine Ignition system for internal combustion engine

1985-08-28

1987-03-24

Argenbright, Tony M.

Internal-combustion engines

High tension ignition system

Power supply, ignition coil primary, and interrupter element...

123149C, 123427, F02P 5155

Patent

active

046517065

ABSTRACT:
An ignition system for an internal combustion engine is disclosed which is adapted to carry out the comparison between an integrating voltage of a first integrating circuit and that of a second integrating circuit by means of a comparator to obtain advance characteristics. An ignition operation allowable interval detection signal generating circuit of the ignition system comprises a charge control transistor turned on when a first pulse signal is generated, a signal accumulating capacitor charged to a given voltage through the transistor, and a discharge control transistor for momentarily discharging the capacitor when a second pulse signal is generated. Such construction of the detection signal generating circuit allows the structure of the ignition system to be significantly simplified. Also, the connection of a speed-up capacitor between a base of the first integrating circuit and an emitter thereof permits the first capacitor to be charged to a substantially constant initial voltage without being affected by an ambient temperature. Further, a reset circuit may be provided with a malfunction preventing capacitor to prevent the shortening of duration of spark.

REFERENCES:
patent: 4292943 (1981-10-01), Kyogoku et al.
patent: 4407246 (1983-10-01), Boyama
patent: 4473050 (1984-09-01), Kondo et al.
patent: 4516554 (1985-05-01), Miura et al.
patent: 4552110 (1985-11-01), Yoshida et al.

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