Constant velocity variable force?

AI Thread Summary
The discussion revolves around the challenge of creating two unidirectional output shafts that rotate at varying velocities, which need to combine into a single output shaft. Suggestions include using a fluid coupling or a continuously variable transmission (CVT) similar to that in the Toyota Prius, which utilizes two input shafts from an electric motor and a gasoline engine. The Prius's CVT allows both power sources to operate simultaneously, although it is not reversible. Participants express curiosity about the feasibility of this concept and share resources for further exploration. The conversation highlights the complexity of combining variable forces in mechanical systems.
Green Zach
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Hello, i have an idea but i ran into a bit of a problem. I need two unidirectional output shafts rotating at unpredictable varying velocities (but predictable within a range) to be able to combine at one output shaft. I have come up with some ideas but they tend to be quite complicated... any suggestions?
 
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I don't even know if what you want is possible. At the least, I suspect that it would have to be some sort of fluid coupling.
 
The CVT (continuously variable transmission) in the Toyota Prius has two input shafts, one from the electric motor, and one from the gasoline engine, that combines the two in a planetary gear system into one output shaft. The transmission is not reversible, so the Prius can back up only with the electric motor.
 
Bob S said:
The CVT (continuously variable transmission) in the Toyota Prius has two input shafts, one from the electric motor, and one from the gasoline engine, that combines the two in a planetary gear system into one output shaft.

Isn't that a 'one or the other' situation, though? Can they actually both provide power at different speeds, at the same time, through the same tranny?
 
sweet :) thanks for the tip! I think i found something i can work with on youtube, totally awesome vid :D killer music lol. I was thinking along the lines of cones... I guess an idea like that can't be developed over the course of a car ride home tho haha.
 
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Danger said:
Isn't that a 'one or the other' situation, though? Can they actually both provide power at different speeds, at the same time, through the same tranny?
Both the internal combustion engine (ICE) and the electric motor (there are actually two, MG1 and MG2) drive the car through the CVT (continuously variable transmission. The ICE drives the planetary support gear, MG1 drives the sun gear, and MG2 is coupled to the ring gear. Read
http://prius.ecrostech.com/original/Understanding/ContinuouslyVariableTransmission.htm
 

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