Designation is continuously variable CVT automatic transmission with a steel thrust belt, based on a variator. Such gear now offer as Ford, Nissan, Volvo, Honda.
CVT (from the English Coutinuously variable transmission, continuously variable transmission) is a computer-controlled continuously variable transmission, based on a variator. The variator consists of two split V-pulleys (driving and driven), each of which consists of two conical steel blade. One disc is always stationary, the second allows axial displacement. Axial shift conical discs to increase or reduce active V-pulleys radii (r 1 and r 2). This is achieved by continuously changing the gear ratio i.
cut pulley variator
The torque from the engine to the driven pulley transfers flexible steel belt. This belt consists of a large number of articles of steel strung on two flexible steel rings. Each of these rings are made up of several thin strips laid in each 0.1 mm thick. Torque pressure is transmitted from one article to another.
steel belt detail
Speech by car with a CVT is somewhat different from conventional automatic transmissions. Driver, while the voters will find well-known symbols (P, R, N, D), but after starting something a little different. The engine is dialed into the optimal power and speed this speed holds. The car is still accelerating, but do not fluctuate at all engine speeds! When this mode is continuously changing the gear ratio and allows to keep constant (optimal) speed motor. After acceleration, speed and fall after a while you will find electronics optimal gear ratio. Beyond the car with a CVT behaves as a classical automaton.
CVT
History of CC
Transmission with continuously variable transmission (CVT) has proposed DAF car, with this principle car came at the end of the fifties (variomatic). DAF was still producing its own cars and new transmission design to become the strong arms of a small car. CVT Transmission is best able to adapt the engine speed and torque range of drivers and vehicle operating speeds.
transfer change - CVT
Text: John Sajdl
Photo: www.carpages.co.uk, www.schaeffler.com, www.honda.co.nz
Keywords: automatic, CVT, Continuously variable transmission, continuously variable transmission, automatic
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