Constantly Changing Gear Ratio

  • Thread starter BasketDaN
  • Start date
  • #1
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I have heard that this concept is already starting to be implimented in cars (constantly changing gear ratios), is this true?
 

Answers and Replies

  • #2
wolram
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it was done years ago by DAF, useing two pullies that expand or contract joined by a belt.
 
  • #3
wolram
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it was also tried in F1 but was banned
 
  • #4
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For googling purposes.... this is commonly called a "Continuously Variable Transmission" or "CVT".
 
  • #5
russ_watters
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I believe that there are several production cars that use it. The gas/electric hybrids I think.
 
  • #6
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What became of it/ why is it not more popular?
 
  • #8
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Ahh I see, thanks. Does anybody know if this is the only way CVTs are currently made?
 
  • #9
LURCH
Science Advisor
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Originally posted by BasketDaN
Ahh I see, thanks. Does anybody know if this is the only way CVTs are currently made?

AFAIK, belt-driven CVT's are the only type being put in automobiles. However, I do recall seeing a bicycle that appearently used a CVT which employed centrifugal force on weights attached to the hub of the tires.
 

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