Internal-combustion engines – Spark ignition timing control – Electronic control
Reexamination Certificate
2007-08-10
2009-12-15
Cronin, Stephen K (Department: 3747)
Internal-combustion engines
Spark ignition timing control
Electronic control
C123S599000, C123S618000, C123S644000
Reexamination Certificate
active
07631633
ABSTRACT:
A capacitor discharge ignition device for an engine including: an exciter coil provided in a magneto generator driven by the engine; a voltage increasing circuit that increases an induced voltage of the exciter coil; a capacitor charged by an output voltage of the voltage increasing circuit; and a discharge switch that is turned on at ignition timing of the engine and discharges charges in the capacitor through a primary coil of the ignition coil, wherein the ignition device further includes a voltage increasing control portion that controls the voltage increasing circuit so as to increase an output voltage of the voltage increasing circuit when a rotational speed of the engine is a set value or less, and limit the output voltage of the voltage increasing circuit when the rotational speed of the engine exceeds the set value.
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patent: 4757797 (1988-07-01), Bengtsson
patent: 5433184 (1995-07-01), Kinoshita et al.
patent: 6138653 (2000-10-01), Juffinger
patent: 6336448 (2002-01-01), Furuhata et al.
patent: 05-052168 (1993-03-01), None
Bacon Anthony L
Cronin Stephen K
Kokusan Denki Co. Ltd.
Pearne & Gordon LLP
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