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The Continuously Variable Power Split Transmission (CVPST) is an improvement
over the Continuously Variable transmission (CVT) in that only a fraction of the
total power flows through the belt-pulley arrangement (variator), thus
increasing the power envelope of the engine application. This feature also
reduces the power losses associated with power transmission, especially in the
low-speed-high-torque mode, while providing continuously variable transmission
ratio capability. Thus, as it can be understood, the CVPST accomplishes two
important functions. First of all, at low gear ratios, only a fraction of the
power flows through the variator. Secondly, the system provides a "stepless"
transmission ratio variation. This, combined with appropriate engine throttle
control, allows for optimum engine performance and optimum fuel consumption and
emissions. Key Benefits
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