The auxiliaries refers mainly to the electrical equipment which is common to all vehicles.
The overall electrical system consists of the following two main types.
(A) Engine electrical system.
(B) Body electrical system.
The engine electrical system consists of starting system, ignition system, and the charging system. The starting system cranks the engine, until it begins to rotate itself and compresses the air-fuel mixture which is contained in the cylinders. The ignition system ignites the air-fuel mixture in the combustion chamber at the correct timing. The charging system charges the battery and supplies electric power to all of the vehicle's electrical systems.
(1) Starting system.
The starting (or cranking) system comprises a battery, a starter, and switch. When the ignition switch is turned to the START position, the starter begins c ' engine using power from the battery. The starter turns the crankshaft and reciprocates the order to compress the air-fuel mixture. This action is continued until the crankshaft Sta the engine by itself.
(2) Ignition system.
An engine's ignition system ignites compressed air-fuel mixture in the cylinder all appropriate times. The ignition system supplies high voltage (About 20,000 volts) to The spark plug gap. The spark is provided at the exact time in the various cylinder according to the firing order of the engine.
(3) charging system.
The charging system generates the electricity required for the operation of the operation of various electrical systems. The main component of the charging the alternator, which produces electricity when driven by the crankshaft via the alternator belt. alternator produces alternating current, which is converted into direct current through rectifiers installed in the alternator.
When the vehicle is moving, the alternator is driven fast enough to be capable of supplying to various electrical systems and of charging the battery. When the engine is shut down or running at idling speed, the alternator's output is not sufficient for charging the battery and for high-load electrical devices. The additional electricity required is supplied by the battery.
The body electrical system components are mainly lamps and lights, indicator lights and warning lights, and other equipment's like audio, horn, air conditioning system, Charging system etc.
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