Automatic Infinitely Variable Transmission

This is a mechanism I actually invented quite some time ago, I just never posted it anywhere until I remembered it last night because of another complex gearing project I'm working on (Hint - It involves a tank and 4 differential gears).

This project uses a pair of differential gears to create a transmission that has an infinite number of gear ratios and automatically cycles through them as resistance on the output changes. It's gear ratios range anywhere from 1:3 (Output spin 3 times as fast as motor) to a sort of powered neutral gear where the output doesn't spin but the motor spins and still applies torque (Similar to an automatic transmission car stopped at an intersection).

I discovered later that this sort of a transmission is usually called a CVT - Continuously Variable Transmission, but as far as I can tell IVT - Infinitely Variable Transmission is an interchangeable term. I also found out that others have made similar Lego CVTs using two differentials, though I didn't copy them at all (I found the others after I made this) and I think mine is the only one where how it works is explained thoroughly.

Lego Automatic Infinitely Variable Transmission

Feel free to use this in your Lego creations, I know I will. I'd appreciate it if you'd mention me in the credits though. =P


DroidFreak Enterprises HQ - July 2012

This video is rather self-explanatory. I'll tell you one thing: This one has a much higher Lego to Nerf ratio than my last HQ video (Though I did slip in a sneak peek of my next Nerf video).

DroidFreak Enterprises HQ - July 2012