Ignition device for an internal combustion engine provided with

Details Ignition device for an internal combustion engine provided with Ignition device for an internal combustion engine provided with

1991-06-20

1992-07-21

Wolfe, Willis R.

Internal-combustion engines

High tension ignition system

Having engine component position sensor

123652, F02P 7073

Patent

active

051313774

ABSTRACT:
The power transistor unit 2A for controlling the current supply to the primary side of the ignition coil 3 includes a light emitting diode 10 coupled to the output of the control unit 1, and a phototransistor 11 optically coupled to the light emitting diode 10. The light emitting diode 10 and the phototransistor 11 together constitute a optoisolator. Thus, the ignition coil 3 is electrically isolated from the control unit 1, and hence a filter circuit for suppressing noise from the ignition coil 3 can be dispensed with.

REFERENCES:
patent: 3868938 (1975-03-01), Trass
patent: 4122814 (1978-10-01), Ford
patent: 4305371 (1981-12-01), Harada et al.
patent: 5002034 (1991-03-01), Herden et al.

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