![]() ![]() The Drive Belt engages, driving the Driven unit pulley at it's largest diameter. ![]() The system is Neutral-with no belt friction and no drag.Īs the engine throttle is opened the Driver pulley flanges begin closing together via centrifugal force. The asymmetric belt has no engagement during the idling of the engine. How Does The Asymmetric Series Function?.As this happens, the speed from the engine transferred to the final drive is increased. The moveable sheave of the driven unit is forced out, as shown, allowing the belt to seek its smaller, high speed ratio diameter. The drive belt will then be forced to a larger diameter within the clutch sheaves, thus pulling it to a smaller diameter within the driven unit sheaves. The moveable sheave of the clutch is forced in (as shown above) as the rpm of the engine is increased. The drive clutch is activated by centrifugal force from the engine crankshaft.The moveable sheaves allow for the pitch diameter, offering infinitely variable power ranges. Both the clutch and the driven units are composed of pulleys with moveable sheaves. The engine clutch is activated by centrifugal force, and the driven unit is torque sensitive, meaning it is responsive to the torque demand of the driven shaft or jackshaft, to adjust the ratio of the system for the power required according to the various conditions. The variable speed drive system normally consists of an driver clutch, and a driven unit, connected into a system by a "V" type belt. The basic operating principles of the variable speed drive system of the type used in many RV's are shown in the above illustration.What is a CVT (Continuous Variable Transmission) drive system?. ![]()
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