AGMA 07FTM09

This paper describes two devices, a clutch and a differential,which are based on the Ikona CVT. This CVT is essentially aninternal gear pair, in which the pinion is mounted on an eccentricthat can drive or be driven by an electric motor/generator, thusproviding a variable ratio. Since this arrangement allows for”branching” of energy flow(s), it can be classified assummation-type CVT. When the CVT is used as a clutch, it wouldreplace the friction-plate clutch in vehicles with standardtransmissions, and the fluid torque converter in automatictransmissions. The new clutch will be referred to as the electrictorque converter. Any excess energy is converted into electricalenergy, and either stored in the battery, or reintroduced into thesystem through the motor/generator. Modulation of the clutch can bevery smooth which is particularly advantageous when the vehiclestarts from rest on uphill slopes. Since no friction element isinvolved, and only a fraction of torque is being manipulated, themodulation can be repeatable regardless of conditions. Finally, ina hybrid-vehicle arrangement, the clutch can be used to maintainthe engine at its optimum speed (within limits), regardless of theroad speed and the gearbox ratio. Similar principals apply to theIkona differential. Unlike today’s limited slip differentials, theIkona differential allows full torque to be transmitted through onedrive wheel, even though the other drive wheel may have completelylost traction. Unlike traditional differentials that allow wheelsto rotate at different speeds, the Ikona differential forces thewheels to do so. Accordingly when the vehicle is changingdirection, the differential can be used to control the speed ofeach drive wheel, thus providing active torque steering.

Edition:

07

Published:

10/01/2007

Number of Pages:

8

File Size:

1 file , 380 KB