Although the characteristics and design methods of noncircular gear pairs have been continuously studied in China, the noncircular gear CVT is still in the preliminary exploration and research stage. The key technology of CVT with noncircular gear has been broken through some countries, and is in the stage of deep application research. CVT with the new mechanism can expand the range of torque ratio up to 10.58 % and increase start up acceleration up to 92 % compared with the conventional MT.Continuously variable transmission (CVT) of noncircular gear has the technical advantages of large bearing capacity and high transmission efficiency. Afterwards, a new mechanism for planetary gearbox of CVT is designed and its effect on expanding of range of torque ratio and improvement of car acceleration is discussed. This paper shows how replacement of CVT with MT can affect in various specification of a certain vehicle (the Saipa Pride 131) in this regard torque ratio, output revolution, driving force, car acceleration and fuel consumption in the target car equipped by CVT are compared with the car equipped by MT system. ![]() Metal pushing belt and variable pulleys is one of the most popular kinds of CVT that uses in the automobiles widely because it can cause to better acceleration because of higher low ratio and better fuel consumption because of less over drive ratio. Great automakers have considered Continuous Variable Transmission (CVT) systems as a superior transmission systems. Transmission system is one of the most important systems in every automobile that has a significant impact on their efficiency. Keywords: " Toroidal drive ", infinite speed ratios by toroidal drive, CVT (continuously variable transmission) This work documents a successfully developed experiment of a " Half Toroidal " continuously variable transmission (CVT) by adjusting its geometrical arrangement of CVT design as well as compared the experimental results of torque, speed, and power delivered at the output disc with those obtained by a theoretical. The " Half Toroidal " type CVT scheme has basic component arrays. The CVT grouping includes infinitely variable transmissions (IVT) so that give a zero output speed within the operating range. Contrast with either manual or conventional automatic transmissions that make use of discrete ratios as well as normally disengage when changing ratio. A continuously variable transmission (CVT) transfers power throughout a range of speed/torque ratios from engine input towards output, continuously exclusive of interruption. The suppleness of a CVT allows the input shaft to maintain a constant angular velocity. This contrasts with other mechanical transmissions that offer a set number of gear ratios. motorcycles), a centrifugal clutch is added to facilitate a "neutral" stance, which is useful when idling or manually reversing into a parking space.Ī continuously variable transmission (CVT) is a usual transmission that can change seamlessly through a continuous range of effective gear ratios and CVT also known as a single-speed transmission, stepless transmission, pulley transmission, or, in case of motorcycles, a twist-and-go. A CVT does not strictly require the presence of a clutch. This is typically higher than the RPM that achieves peak efficiency. When power is more important than economy, the ratio of the CVT can be changed to allow the engine to turn at the RPM at which it produces greatest power. A belt-driven design offers approximately 88% efficiency, which, while lower than that of a manual transmission, can be offset by lower production cost and by enabling the engine to run at its most efficient speed for a range of output speeds. The flexibility of a CVT allows the input shaft to maintain a constant angular velocity. ![]() This contrasts with other mechanical transmissions that offer a finite number of gear ratios. A continuously variable transmission (CVT) (also known as a single-speed transmission, stepless transmission, variable pulley transmission, or, in case of motorcycles, a twist-and-go) is an automatic transmission that can change seamlessly through a continuous range of effective gear ratios.
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