Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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


    User Avatar
    Gold Member

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


    User Avatar
    Gold Member

    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


    User Avatar

    Staff: Mentor

    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


    User Avatar
    Science Advisor

    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.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Threads - Constantly Changing Gear Date
PC fraud by changing properties Aug 10, 2017
Mac Apps Crash Constantly Mar 10, 2017
Changing DNS for Window 7 Oct 4, 2016
Never Changed My Router Password - Got Attacked? Sep 25, 2016
New computer constantly freezing? May 17, 2011