The Constant Variable Transmission (CVT) with no wearable parts,has been the focus of generations of inventors and engineers. This fellow seems to have it.

However, I posted this earlier and then took it down. Why? The problem with the design is the input will also put its input pressure back onto the control device.

http://www.gizmag.com/steve-durnin-ddrive-d-drive-infinitely-variable-transmission-geared/15088/

http://www.gizmag.com/d-drive-redux/15120/

My take on this is it does need work. However, electric motors have a huge amount of instantaneous torque. So using an electric motor to control the output of a gas or diesel engine would not be such an issue. The power lost to the control motor would be worth not having wear plates or the complexity of  todays transmission.

I look forward  to seeing this technology progress and be applied in a real world application.

Update: May 15, 2011: Not a whole lot of progress here. It would make me feel better if a couple organizations or people with real money got on-board and pushed this forward. In many respects I think he should forget about building a few of his own and just sell the right to use the design to a couple manufacturers. They would push it along much faster….

http://infinitelyvariabletransmission.com.au/ivt/the-company/

-Dennis

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