D-Drive infinitely variable transmission

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D-Drive infinitely variable transmission

Post by Xaccers »

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Post by ellevie »

Nice idea :).

See also CVT (continuously variable transmission) http://en.wikipedia.org/wiki/Continuous ... ansmission

Apparently Leonardo da Vinci came up with the idea in 1490.
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Post by CitroJim »

ellevie wrote:Apparently Leonardo da Vinci came up with the idea in 1490.
And DAF put it into production shortly afterward :lol:

Seriously, CVT is very, very good indeed. People used to enjoy a joke on the DAF elastic bands but the system was very fundamentally sound and more efficient than a conventional autobox...

Behavour initially appeared a bit bizarre; the engine revs would barely change as the car road speed changed. Accelleration could be very rapid as the optimum ratio was always selected.