Starting system includes starter motor and its accessory parts. Its function is to rotate the static crankshaft by outsideforce until the crankshaft has reached the speed required for cylinder combustion expansion so as to enable the enginerunning by itself.Chapter 14 StarterSection 1 Structure of StarterFig.363 Structure of starterStarter is used to convert electric energy into mechanic energy, rotating the crankshaft of engine and starting the engine.Starter is the equipment for starting engine. Starter includes 3 parts1. DC motor? Armature: including armature spindle, iron core and commutator armature winding, etc.? Electrical brush: connected with commutator and made by pressing bronze powder and graphite.2. Control switchIt applies the magnetic switch, using the ignition switch to control the magnetic switch on the starter so as to switch on oroff the circuit and help the starting of engine.3. Driving MechanismThe driving mechanism is composed ofoverrunning clutch and pinion. When the starterrotates and the magnetic switch is switched on,the pinion will mesh with gear ring of fiywheelunder the force of over running clutch, thusstarting the engine.4. Structure of StarterSee Fig. 363Planetary gearPlanetary gear shaftInner gear ringShock absorberPlate washerStop ringMagnetic switchPlunger coverStarter housingMagnetic field frameO-ringBrush holderDust removerO-ringArmatureCommutator end framePlatePlate washerPlate washerCenter bearingLock ringDrive lever forkStop ring Lock ringStarter clutch177
