Capacitor discharge engine ignition device
AssigneeKokusan Denki Co., Ltd.
InventorsMasayuki Sugiyama, Yasukazu Hatano, Akira Shimoyama
Life of this patent
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Abstract
A capacitor discharge ignition device in which a coil unit including an ignition coil and an exciter coil wound around a common core, and an ignition unit including a circuit board and components of an ignition circuit mounted to the circuit board are housed in a case and molded with resin poured into the case, wherein the ignition coil and the exciter coil are placed axially with a spacing therebetween and a space is formed between the coils, the circuit board of the ignition unit is placed on a lateral side of the coil unit, and terminals for connecting the ignition coil and the exciter coil to the circuit board are all connected to the circuit board through the space between the ignition coil and the exciter coil.
Claims12
A capacitor discharge engine ignition device comprising:
- a coil unit;
- an ignition unit;
- and
- a case housing said coil unit and said ignition unit,
- wherein said coil unit includes a core having a magnetic pole portion for being faced to a magnetic pole on a magneto rotor driven by an engine, an exciter coil that is wound around said core and induces an AC voltage in synchronization with rotation of said engine, and an ignition coil placed in parallel with said exciter coil and wound around said core,
- said coil unit is housed in said case with the magnetic pole portion of said core placed outside said case,
- said ignition unit includes an ignition capacitor, a capacitor charging circuit that charges said ignition capacitor with an output of said exciter coil, a discharge circuit that discharges charges accumulated in said ignition capacitor through a primary coil of said ignition coil when receiving an ignition signal, and an ignition timing control circuit that controls timing for providing said ignition signal to said discharge circuit, and said ignition capacitor and components of said capacitor charging circuit, said discharge circuit and said ignition timing control circuit are mounted to said circuit board,
- said ignition unit is placed on a lateral side of said coil unit in the case with a surface of said circuit board directed in parallel with an axis of said coil unit,
- said exciter coil and said ignition coil are placed axially with a spacing therebetween, and a space is formed between the coils,
- a plurality of ignition coil connection terminals drawn out from said ignition coil for connecting said ignition coil to said circuit board and a plurality of exciter coil connection terminals drawn out from said exciter coil for connecting said exciter coil to said circuit board are drawn out toward said circuit board through the space between said ignition coil and said exciter coil and connected to said circuit board, and
- said coil unit and said ignition unit are molded with resin poured into said case.
Dependencies are inferred from the claim text.