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Location:
Brisbane
Registered:
May 2002
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Re: Compound turbo
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Wed, 16 July 2003 03:53
 
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| HKSPete wrote on Wed, 16 July 2003 10:05 |
What about a mini gearbox inside the supercharger side of it? If you can get 2 or even 3 speed transmissions for 1/10th scale remote control cars, then its possible they can be that compact.
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Now we're getting pretty complex! It could be done but such a transmission couldn't be too compact when you consider the amount of power it has to deal with. The blowers on drag V8's require 100's of hp to turn at max power; obviously a normal road car wouldn't be that extreme, but we're not talking trivial amounts of power either.
Some manufacturers are experimenting with electrically assisted turbos, which is a much neater solution. Basically a high-rpm electric motor sits on the shaft of the turbo, and keeps the turbo spinning when there isn't enough exhaust gas to do the job. I'm not sure if there are any such units in production yet, but there's a bit of info on TurboDyne's web site:
http://www.turbodyne.com/
| Quote: |
Do centrifugal superchargers have an efficiency rpm or an efficiency boost pressure? If you could build one that could keep spinning but not produce any extra boost (what does a supercharger do outside its efficiency range?)....
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Centrifugal superchargers develop boost as an exponential function of rpm. If you overspeed them, boost goes through the roof!
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