can i use the principle of Continuously Variable Transmission (CVT) to create a very efficient Flywheel?

can i use the principle of Continuously Variable Transmission (CVT) to create a very efficient Flywheel? By this i mean, could i use the idea of a wheel with springs and weights that changes its moment of inertia at different angular velocities, to make a flywheel that would keep my small engine turning at top effieiency? This could be used in addition to, or to replace a standard flywheel. It would be for a custom built steam engine. All dimensions, everything custom, so anything is possible here. If you think this idea would or would not work, let me know! thanks

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lemonie8 years ago
The efficiency of the engine is dependent upon the speed it's running at and load, which is why variable transmissions are used. Are you thinking of using a variable transmission, or a stored inertia device? Not sure what you'd be using this for. L
MechEngineerMike (author)  lemonie8 years ago
I was going for more of a stored inertia device. I asked the same question on Yahoo answers, and i got feedback about Kenetic Energy Recovery Systems (KERS), which i didnt know about and are awsome! i am going to experiment with hooking up a differential (legos are good for this), shaped like a 'T' The perpindicular part will be the drive shaft, one of the sides will be go to the traditional differential for the tires, and the other side will be a CVT connected to a flywheel. This is pretty convoluted, ill add a picture.
something like this... what would this do?
CVT flywheel.bmp
You've also got the potential to store energy on braking (a proven flywheel use), but that involves clutches & stuff) L
My thoughts are that like a big Victorian mill, if your flywheel is very large you'll avoid running the engine up and down the rev-range as much, and could keep it at the best point on the performance-curve for longer. But that would just be a big heavy disk. Shifting angular momentum & such would probably involve some mechanical actuation, but as far as I see it (which isn't that much) it sounds like a reasonable idea. L
ok i got excited, the other image is not related to this topic so much. This picture is the subject of this topic question. Would this device be useful for any applications?
variable flywheel.bmp