Don't know if this has ever been discussed here, found nothing on search but below is a summary of what Anatov has developed for a supercharger. The transmission effectively turns an ordinary supercharger into a sequential supercharger through the use of a two speed transmission giving a vehicle low and high end torque.
Website is : www.antonov-transmission.com

Market Issues:
Superchargers provide better drivability than turbochargers but to obtain good boost at low engine speeds leads to
inefficient operation at high engine speeds

Variable speed drives (eg electric drive) have too high a powerloss to show significant overall gains

Problem Statement:
How to achieve a compact, low cost and highly efficient multi-speed drive to a supercharger?

Antonov Solution:
Use of a single AMM packaged into the input of the supercharger drive provides a 1.4:1 step up at lower engine speeds

No external controls are required but a simple solenoid control to allow the EMS to fine control the exact shift points for better engine control can be provided

High transmission efficiency ensures full use of the efficiency gains from better supercharger operation

Status:
Manufacturing partner in place for low volume manufacture

Sales underway to niche vehicle makers and US aftermarket distributors

Discussions on higher volume applications underway

 

interesting

 

Did you get the manufacturer/tuner website right? Marketing talk is always great, whilst let's see some more concrete proof in reflect.

 

Sorry, it's www.antonov-transmission.com

thanks for catching that.

 

Impressive, definitely something to look forward to when they do decide to include the S2000 into their range. Bookmarking site.

 

That would kick A$$ if it works!

 

the ultimate setup would be a centrifugal supercharger with a CVT transmission behind it. Roots like torque curve with minimal parasitic loss.

 

Build it, baby!

 

Ironically, this design was first used in the late 1960s. Using a CVT tranny from a chainsaw fitted to the front end of a centrifugal rotrex supercharger. For some reason after the guy that built it died it just went away.