Ramakrishna Mission

Shilpamindira

AUTOMATIC TRANSMISSION

SYSTEMNAME :~ Sumit Kumar Seal

MECHANICAL :~ 592nd Year.

What is Auto Transmission System :~

Automatic transmission is a type of motor vehicle transmission that can automatically change the gear ratios at the vehicle moves, freeing the driver from having to shift gears manually.

SEVERAL PARTS

ClutchThe gear boxPropeller shaftUniversal jointsRear axleWheelTiers

SPECIALITY OF AUTOMATIC TRANSMISSION :~

Automatic transmission Shifts gears automaticallyDoes not require a manual clutch

Front-wheel-drive vehicles Combine transmission with differential in

transaxle Most automatic transmissions use a torque

converterSome use a dual clutch arrangement

PARTS OF AUTOMATIC TRANSMISSION :~

Torque Converter Input Shaft

Transmission Pump Planetary Gear

Set

Governor Modulator

Valve Body Multiple Clutch Plate

METHOD OF POWER TRANSMISSION:~

Fluid, friction, and gears starts working with power input.

Torque converter transmits power by using fluid.

Planetary holding members starts to work by using fluid and friction.

Gears transmit power and change speed and torque.

HOW THEY WORKS ??TORQUE CONVERTER INPUT SHAFTTRANSMISSION PUMPPLANETARY GEAR

MILESTONE ACHIVED BY AUTO TRANSMISSION OVER MANUAL

TRANSMISSION :~Doesn’t have to be shifted by driver.Running on an internal hydraulic system. Have advanced automatic electronic

control.Advanced clutches and gear set are

provided. Input shaft is connected with main crank

shaft through Torque converter.

APPLICATIONSWidely used in high speed cars.Modern luxurious cars, heavy duty trucks. In six strokes and eight strokes heavy

engines.

ADVANTAGES :~Shifts gear automatically.Doesn’t need to change gear with subsequent

speed.Makes journey more easier and comfortable.Lower risks at higher speed.

DISADVANTAGES :~More costlier than manual transmitted cars.Makes the engine design more complicate.As partly controlled by automation, Electronic

faults may occur.