Subaru Robin Power Products RGX3510 manual 4ELECTRONICIGNITIONSYSTEM

5-4ELECTRONICIGNITIONSYSTEM

The electronic ignition system features a power transistor as the current control element. Therefore, the ignitionsystem is an electronic contact point-free type that operates with the power transistor impulses

controlling the current. This system is also called TIC (transistorignitercircuit)and is virtually free of ignition failure n-hich generally results from contamination of the contact points, a typical problem with contact type ignition systems.

Becausethisignitionsystemhasnocontactpoints, it is notaffected by moisture,oil,dust,orother contaminants. As a result, this electronic ignition system ensures sure and positive ignition with reduced maintenance.

The TIC mechanism consists of a transistor-incorporated ignition coil and a permanent magneto built-in flywheel which is press-fitted on the rotor shaftof the generator.

	i
	II:	IGNITION COIL
IGNITION
TIMING		PLUG
		FLYWHEEL
		COOLING FAN

(1)When the permanent magneto built-in flywheel starts rotating, power is generated in the primary coil of the ignition coil and current flows to the resistor13.

From the resistor, current flows to the power transistor. With this current, the power transistor turns on, releasing current:BThis..stage corresponds to the closingof contact points.

(2)As the flywheel comes to the point of ignition, the ignition timing detecting circuit is activated while the current :@ is flowing through the circuit.

\;hen the ignition timing detecting circuit is activated, the signal transmitter transistor actuates with current :$$ flowing. When current :a:starts flowing, current(3flowing through the power transistor is cutquickly. As aresult,highvoltageisproducedinthesecondarycoilandthisvoltageisapplied simultaneously to the spark plug n-hich ignites for ignition. This stage corresponds to the opening of contact points.

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