International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 02 | Feb -2017
www.irjet.net
e-ISSN: 2395 -0056 p-ISSN: 2395-0072
FABRICATION OF CVT OPERATED BIKE Professor. Dinesh Yelure1, Kushal N. Ukey2, Amol S. Chaudhary3,Gajanan D. Ingole4, Aman V. Ingole5
Assistace professor J D College of engineering Nagpur Maharashtra (India) 2Student J D College of engineering Nagpur Maharashtra (India) 3Student J D College of engineering Nagpur Maharashtra (India) 4Student J D College of engineering Nagpur Maharashtra (India) 5Student J D College of engineering Nagpur Maharashtra (India) --------------------------------------------------------------------***----------------------------------------------------------------------1
Abstract- Nowadays, automakers have invested in new technologies in order to improve the efficiency of their products. Giant automakers have taken an important step toward achieving this objective by designing continuously variable transmission systems (CVT) to continuously adapt the power of the engine with the external load according to the optimum efficiency curve of engine and reducing fuel consumption; beside, making smooth start up and removing the shock caused by changing the gear ratio and making more pleasurable driving. In this research work the fabrication of CVT operated bike.
given number of ratios (or speeds). The transmission shifts gears to provide the most appropriate ratio for a given situation: Lowest gears for starting out, middle gears for acceleration and passing, and higher gears for fuel-efficient cruising. The CVT 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 (input shaft) and the other to the drive wheels (output shaft). 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. Changing the diameter of the pulleys varies the transmission's ratio (the number of times the output shaft spins for each revolution of the engine), in the same way, that a 10-speed bike routes the chain over larger or smaller gears to change the ratio. Making the input pulley smaller and the output pulley larger gives a low ratio (a large number of engine revolutions producing a small number of output revolutions) for better low-speed acceleration. As the car accelerates, the pulleys vary their diameter to lower the engine speed as car speed rises. This is the same thing a conventional transmission does, but instead of changing the ratio in stages by shifting gears, the CVT continuously varies the ratio.
Keywords-CVT operated bike , continuous change in gear ratio, fabrication concept.
I.
INTRODUCTION:
Reviewing the development of Continuously Variable Transmission (CVT) technology, reveals that after the conceptualization of the first CVT by Leonardo da Vinci in 1490. A continuously variable transmission (CVT) transfers power through a range of speed/torque ratios from engine input to output, continuously without Interruption. A continuously variable transmission is an automatic transmission that can change seamlessly through a continuous range of effective gear ratios. This contrasts with other mechanical transmissions that offer a fixed number of gear ratios. The flexibility of a CVT allows the input shaft to maintain a constant angular velocity. So in this research the fabrication of CVT operated bike can do it. In this the variator pulley are mounted on crank shaft and clutch pulley on transmission shaft on which smaller sprocket are mounted. The CVT components are: CVT INFORMATION: A continuously variable transmission, or CVT, is a type of automatic transmission that provides more useable power, better fuel economy and a smoother driving experience than a traditional automatic transmission. Conventional automatic transmissions use a set of gears that provides a
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