D-Drive infinitely variable transmission

Xaccers · Unread post by **Xaccers** » 16 May 2010, 21:06

http://www.abc.net.au/tv/newinventors/txt/s2865950.htm

Sounds interesting to me.

ellevie · Unread post by **ellevie** » 17 May 2010, 11:39

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.

Unread post by **CitroJim** » 17 May 2010, 12:06

ellevie wrote:Apparently Leonardo da Vinci came up with the idea in 1490.

And DAF put it into production shortly afterward

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.