Describe the necessity of Gear box in Automobile.

Describe the necessity of Gear box in Automobile.
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1 Answer

Answer :

Necessity of gear box: The engine delivers its full power at high speed and its direction of rotation is not reversible. When a vehicle starts from rest, hill climbing, accelerating and meeting other road resistances, high torque (tractive effort) is required at driving wheels. Hence a gear box is used to permit the engine crankshaft to revolve a relatively high speed, while the wheels turn at slower speeds. The vehicle speed is also changed with the help of gear box keeping the engine speed same with certain limit. This is the main purpose of gearbox to provide speed variations in road wheels by keeping engine speed constant.
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