Ignition control apparatus for an internal combustion engine

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

1990-03-19

1990-12-18

Wolfe, Willis R.

Internal-combustion engines

High tension ignition system

Current or voltage sensing in coil primary

123609, F02P 305, F02P 3045

Patent

active

049778838

ABSTRACT:
An ignition apparatus for an engine limits the primary winding current of an ignition coil to a prescribed level. The conducting time of drive transistors which control the primary winding current is controlled on the basis of the voltage across a capacitor which is charged by a signal generator. At normal engine speeds, when the primary winding current reaches the prescribed level, current is bypassed around the capacitor by a bypass transistor. When the engine is cranking and the signal generator voltage is low, a switching transistor disables the bypass transistor, and the capacitor is not bypassed, thereby preventing misfiring.

REFERENCES:
patent: 4440130 (1984-04-01), Taguchi et al.
patent: 4469082 (1984-09-01), Mishitoba et al.
patent: 4492213 (1985-01-01), Yamamoto et al.
patent: 4552118 (1985-11-01), Fukaya
patent: 4558684 (1985-12-01), Caddy et al.
patent: 4625689 (1986-12-01), Komurasaki
patent: 4658788 (1987-04-01), Yamamoto et al.
patent: 4739743 (1988-04-01), Iwata
patent: 4799471 (1989-01-01), Lasagna et al.

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