Electric turbos in the future?

[fastblackracing]

I was reading in a magazine that audi is using an electric assist turbo on a few of its newer models.
This got me to thinking, how much energy does it take to power a turbo, say one that would be able to move 75 pounds of air at a 3:1 pressure ratio? How do the big turbo companies do it when they create the airflow maps for their compressor wheels? Ive heard that turbos take about 10% of the power they generate to get the job done but not sure if this is correct. Does anyone have an idea on this? How much of the power draw to spin the turbine wheel comes from airflow thru the motor, heat from the exhaust, and pressure drop across the turbine wheel as percent % to get the boost we are addicted to? Just me thinking out loud.






















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[bison]

Mapping wheels is extremely expensive which is why you don't see maps for niche companies. Too many variables. The amount of mass flow required to drive the compressor can be calculated out. There's a lot of factors involved. If the engine is more efficient it will likely have a higher exhaust to intake pressure ratio when the wheels are sized accordingly. It's hard to say what % they are taking. It's a lot better than a belt driven type blower though. Im sure some electric centrifugal blower applications will become more mainstream as manufactures look to continue downsizing engines and still want acceptable torque. Direct injection and turbos work together very well also. If you go and study the F1 program from the 80's you can see that they used massive air compressors to test the effects of manifold pressure on the engines before they put a turbo on them. I don't know why exactly why they did this but the results they achieved definitely say something. Most on here are still stuck in 1995 as far as what can be done with even the LC2.


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[regan j]

I maybe wrong but i seem to remember the Nissan 300 had twin electric turbos, early 90's or late 80's model possibly.

 

[bison]

I maybe wrong but i seem to remember the Nissan 300 had twin electric turbos, early 90's or late 80's model possibly.

They were gas driven turbines


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