Geared CVT gearbox

DAF made cars with drive belts that did the same thing, Variomatic I think they called it.
 
Very similar Jim, most Audis etc have it too, our MG has it I think.
 
maingate said:
DAF made cars with drive belts that did the same thing, Variomatic I think they called it.
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I believe that's what developed into the Van Dorn box that Volvo, then Ford owned. Where the DAF used belts and pulleys the Van Dorn used chains. I had a new Fiesta when Ford bought out their CVT gearbox, reckon awful thing and put me off CVT for the rest of my life lol.

You could floor the throttle, engine roared but speed didn't pick up as chains went to high gear, was brilliant for scaring pedestrians stepping out in front of you lol

Was also reputedly as quick in reverse as forwards, I did try to test this out on the beach at Southport (think was there). Had it up to 40mph in reverse before I chickened out. Absolutely empty beach but just didn't feel safe lol
 
I had a rally rounabout rm6 veromatic when i was about 13, belt drive with sliding front pulley.moped.jpg
 
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We bought an Audi A6 and it had the CVT, it was fine at most speeds and certainly got a move on but at slow traffic speeds around 15-25 it was awful you could feel & hear it slipping on the cones.

This geared version could cure all that perhaps.
 
trevskoda said:
The japs watching this will have a better unit out next week. 😂
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They already have. Honda have now progressed to using the petrol engine to power a generator, that provides electricity for an electric drive and a battery. There is a fixed gear that engages engine drive at higher cruising speeds but no need for varying gear ratios.
 
The DAF system was indeed operated using super sized fan belts, about 2/2.5 inches wide. We had a DAF55 and although it snapped belts occasionally it never cost us to replace them because of warranty. Quite a limited slip on the differential as well. Used to squeal just going round corners at walking speed. 🤣.

Cheers

H
 
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