Telam CVT
CVTCVTIt has been known for decades in the automotive industry that a continuously variable transmission (CVT) would increase gas mileage. In fact there are several in use today. All excluding ones with supplemental motor planetary systems are variations of the Van Doorne design. The Van Doorne design is essentially a belt drive with the 2 pulleys diameters being variable. Since being a simple belt it relies on friction which severely limits it use in automobiles. Refinements such as steel belts and push belts have improved the torque capacity, but you must still increase the normal force via the pulley to increase torque capacity. To do this requires hydraulics or other parasitic forces on the pulleys which increases with torque and subtracts from the inherent increased efficiencies of the CVT itself.

The Telam CVT is a constant mesh gear design. It has both forward and reverse rotation as well as a geared neutral. Forward ratios of over 10:1 and reverse ratios of over 5:1 have been demonstrated in prototypes as well as geared neutral. The design is fully scalable and is light weight and efficient due to its gear mesh and no high parasitic loadings required to increase the friction force. With its forward, neutral, and reverse capability the Telam CVT is very well suited for applications presently using hydrostatic transmissions. These applications include lawn tractors, zero turn lawn mowers, and skid steering vehicles and other construction and agriculture vehicles. The Telam CVT should show a 25% efficiency improvement over a hydrostatic system.

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