Engine ignition system having noise protection circuit

Details Engine ignition system having noise protection circuit Engine ignition system having noise protection circuit

2006-11-07

2006-11-07

Argenbright, T. M. (Department: 3747)

Internal-combustion engines

High tension ignition system

Safety device

C123S651000, C123S656000, C361S091600

Reexamination Certificate

active

07131436

ABSTRACT:
An ignition system for an internal combustion engine is connected to an ignition coil and to a circuit for providing an ignition signal. The ignition system includes a switch circuit connected to the ignition coil that switches on or off current supplied to the ignition coil, a control circuit that controls the switch circuit based on the ignition signal and a protection circuit that includes a pair of back-to-back connected zener diodes connected between the input terminal of the control circuit and a ground.

REFERENCES:
patent: 4099998 (1978-07-01), Ferro et al.
patent: 5915367 (1999-06-01), Oishi et al.
patent: 6495863 (2002-12-01), Narazaki
patent: 6539929 (2003-04-01), Ito et al.
patent: 6595194 (2003-07-01), Ito et al.
patent: 6717412 (2004-04-01), Moritz et al.
patent: 2002/0145843 (2002-10-01), Parada et al.
patent: 10-274142 (1998-10-01), None

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