无极变速器.ppt

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1、LOGOContinuously VariableContinuously Variable TransmissionTransmissionName:Li BingNO.:LOGOContentsContentsWhat is CVT?1How CVT works?2Pros and Cons of CVT?3Example LOGOWhat is CVT?What is CVT?vA continuously variable transmission(CVT)is a transmission that can change steplessly through an infinite

2、number of effective gear ratios between maximum and minimum values.vCVT is a type of automatic transmission that provides more useable power,better fuel economy and a sommther driving experi-ence than a traditional LOGOHow CVT works?How CVT works?Most cars use a pair of variable-diameter pulleys,eac

3、h shaped like a pair of opposing cones,with a metal belt or chain running between them.One pulley is connected to the engine,the other to the drive LOGOHow CVT works?How CVT works?The halves of each pulley are moveable;as thepulley halves come closer together the belt isforced to ride higher on the

4、pulley,effectivelymaking the pulleys diameter larger.Changingthe diameter of the pulleys varies the trans-missions ratio.How CVT WLOGOPros and Cons of CVT?Pros and Cons of CVT?vpros:1.Eliminating the shift impact,make the driving more smoothly 2.Improved fuel efficiency 3.Instead of inefficient hydraulic torque convertervcons:1.Unable to withstand large torque 2.Belt easily slips 3.Power output quite LOGOExample LOGO