Starting system
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The starting system consists of battery, cables, starter motor, flywheel ring- gear and the ignition switch.
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Starter motor principles
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The starter motor converts electrical energy to mechanical energy and is mounted on the cylinder block in a position to engage a ring gear on the engine flywheel.
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Starter motor construction
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The armature is the revolving component of the direct current motor. Brushes maintain contact with a commutator on the armature shaft to conduct current through the windings as the armature rotates.
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Starter magnet types
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Normally four stationary field poles are mounted in the outer casing or yoke and these can be electro-magnets or permanent magnets.
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Starter motor engagement
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Solenoid operation moves the operating fork and pinion to mesh with the ring gear and causes the plunger contacts to bridge the main starter terminals.
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Commutation
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A starter motor armature has a large number of conductor loops and so has many segments to the commutator. Each segment is connected to a loop and is insulated from other segments.
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Switching
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The starter motor is brought into operation by a starter switch incorporated as a part of the ignition key. It operates a solenoid which has two functions. To engage the drive pinion with the engine flywheel and connect the battery directly to the starter motor.
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