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  • jayakumar asked on 23 Feb 2021
    Q.

    Which one is the best AMT or CVT

    • Cardekho experts
    • on 23 Feb 2021

    Automated Manual Transmission is the automation of the conventional manual transmission system. There is no big change in terms of design, basic principles in AMT as compared to a manual transmission. AMT only eliminates driver’s effort for the operation of clutch and gear shifting-selection as both are done automatically. In AMT, clutch and gear shifter-selector mechanism are operated by a hydraulically operated kit which is controlled by Transmission Control Unit. Shift shocks felt in manual transmissions are not eliminated in AMT. AMT provides a limited gear ratio i.e. 4/5/6 speed similar to a manual transmission. Whereas Continuous Variable Transmission, it replaces the gears with two variable-diameter pulleys, each shaped like a pair of opposing cones, with a metal belt or chain running between them. One pulley is connected to the engine and the other to the drive wheels. The halves of each pulley are movable; as the pulley halves come closer together the belt is forced to ride higher on the pulley, effectively making the pulley's diameter larger. In CVT engine is always operated at a favourable speed that gives best engine efficiency, whereas AMT engine is not continuously operated at a speed that gives out the best efficiency. Also in AMT, there is a drop in driving force during the gear shifting period that results in an unpleasant driving experience. For a CVT to be more fuel efficient than a manual, the driving must be very sedated and mostly constant speeds. For normal driving conditions, it may yield low fuel efficiency values. The CVT transmission is better because it has infinite gear ratio. Also, CVT is smoother than AMT.

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