Vehicle engine ignition system utilizing light guides for protec

Details Vehicle engine ignition system utilizing light guides for protec Vehicle engine ignition system utilizing light guides for protec

1981-02-18

1983-04-19

Nelli, Raymond A.

Internal-combustion engines

High tension ignition system

Having engine component position sensor

123633, F02P 100, F02P 100, F02P 504, F02P 506

Patent

active

043802257

ABSTRACT:
In order to mount the control circuit for the ignition system at a location remote from the spark plug and ignition coil, i.e. at a location not subject to electromagnetic or electrical interference, photoconductors are used to interconnect the control circuit with the final output stage. Photoconductors are also used to interconnect the basic synchronization unit, that is the unit which furnishes a pulse for each rotation of a shaft of the engine, to the input of the control circuit. A theft prevention device is also incorporated. Specifically, the control circuit compares a sequence stored in a microprocessor to the on/off pattern of a received light pulse sequence. The latter is applied from a light emitter through a convex lens and a photoconductor to a second input of the control unit. Only if the stored pattern corresponds to the received light pattern can control signals initiating a spark be generated.

REFERENCES:
patent: 4007724 (1977-02-01), Mura
patent: 4092968 (1978-06-01), Stover et al.
patent: 4106461 (1978-08-01), Gianinni
patent: 4106462 (1978-08-01), Hildebrandt et al.
patent: 4116174 (1978-09-01), Schlicting

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