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Constantly Changing Gear Ratio

  1. Jun 14, 2003 #1
    I have heard that this concept is already starting to be implimented in cars (constantly changing gear ratios), is this true?
  2. jcsd
  3. Jun 14, 2003 #2


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    it was done years ago by DAF, useing two pullies that expand or contract joined by a belt.
  4. Jun 14, 2003 #3


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    it was also tried in F1 but was banned
  5. Jun 14, 2003 #4
    For googling purposes.... this is commonly called a "Continuously Variable Transmission" or "CVT".
  6. Jun 14, 2003 #5


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    I believe that there are several production cars that use it. The gas/electric hybrids I think.
  7. Jun 14, 2003 #6
    What became of it/ why is it not more popular?
  8. Jun 14, 2003 #7
  9. Jun 14, 2003 #8
    Ahh I see, thanks. Does anybody know if this is the only way CVTs are currently made?
  10. Jun 16, 2003 #9


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    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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