PIMPRI CHINCHWAD POLYTECHNIC PROGRAM MECHANICAL ENGINEERING COURSE AUTOMOBILE

PIMPRI CHINCHWAD POLYTECHNIC PROGRAM: MECHANICAL ENGINEERING COURSE: AUTOMOBILE ENGINEERING (17526)

5. Eletrical systems. CO 501. 1: Identify various components of Automobile. C 501. 4 : Describe battery constructional details, charging system, starting system, lighting system.

Electrical Systems

Function of battery: �Battery supplies the current for cranking motor and ignition system when the engine is being cranked for starting. �When the vehicle is stationary battery supplies electricity for operating the various electrical devices.

Construction: � Battery consists of – Container, Positive and negative plates, Separators, Cell cover, Electrolyte, Grids, Cell connectors, Taper terminals, sealing compounds etc. � Positive and negative plates are arranged alternately and separated by separators. � Negative plates are surrounded by spongy lead paste and positive plates are surrounded by lead peroxide. � The entire container of battery is filled with an electrolyte. � All positive plates are connected to positive terminal and all negative plates are connected to negative terminal.

Battery……

Battery Testing �Specific Gravity Test �Open Volt Test �High charge Test �Cadmium test

Battery Rating �Twenty Hour test �Cold rating �Twenty five ampere rate

Battery Ignition System

Magneto Ignition System

Magneto Ignition System

Electronic Ignition System �Transistor Assisted contact system

Capacity Discharge Ignition System

Starting System

Bendix drive

Alternator

Wiring System �Colour codes used in wiring system: �Brown: Battery & Generator circuit �Yellow: Overdrive circuit �White: Ignition circuit �Green: Auxiliary circuit fed through ignition switch �Blue: Head lamp circuit �Red: Side and Tail lamp circuit �Black: Earth circuits

Wiring Diagram