Continuously variable transmission (CVT) Mechanical Seminar Topic

Introduction to Continuously variable transmission (CVT):

In continuously variable transmission (CVT) infinite number of effective gear ratios changes from maximum to minimum values. The difference between other mechanical transmissions and continuously variable transmission (CVT) is few different distinct gear ratios to be selected. Better fuel economy can be achieved by enabling the engine to run at most effective revolutions per minute in continuously variable transmission (CVT) than other mechanical transmission systems.

Continuously variable transmission has been in use from so many years. In this system to transfer power from power source to load friction play major role in power loss .To overcome the limitations inherent in the current CVT embodiments employing friction, a conceptual, continuously variable, positive engagement embodiment has been proposed for investigation at Brigham Young University.

There is different type of continuously variable transmission (CVT) system in different automobiles. Two V-belt pulleys that are split perpendicular to their axes of rotation, with a V-belt running between them are used in most common CVT’s. The main components used in continuously variable transmission (CVT) are 1. A high-power metal or rubber belt,  2  . A variable-input “driving”  pulley,   3. An output “driven” pulley

Main advantage of using CVTs is it can be easily used as ideal transmission for different mechanical devices other than vehicles. power tools and drill presses are few areas where CVTs usage plays important role. Applications of CVTs are also mainly seen in two wheeler and four wheeler like tractors, scooters and snow mobiles. In all these applications rubber belts of high density are used which is not efficient because they may stretch and slip.

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