Procharger put a CVT on a centrifugal supercharger
07-23-2013, 11:48 AM
#1
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Procharger put a CVT on a centrifugal supercharger
i-1 Supercharger
Expensive? Yes.
Complex? Yes.
Reliable? Who knows?
Better than the royal turbo? Maybe?
Expensive? Yes.
Complex? Yes.
Reliable? Who knows?
Better than the royal turbo? Maybe?
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07-23-2013, 11:59 AM
#4
Questions that arise at 1st glance:
is the cvt to multiply the rpm as it rises on the engine? meaning it starts off at slowest speed (the concern here would be overspinning the compressor like crazy)
or
is the cvt to increase rpm down low and decrease it up top? (resulting is a less pathetic lowend/midrange that these things usually put out, and no threat of overspinning)
is the cvt to multiply the rpm as it rises on the engine? meaning it starts off at slowest speed (the concern here would be overspinning the compressor like crazy)
or
is the cvt to increase rpm down low and decrease it up top? (resulting is a less pathetic lowend/midrange that these things usually put out, and no threat of overspinning)
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07-23-2013, 12:02 PM
#5
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so many betters. i honestly thought this was going to be the main idea/difference in the Rotrex when it was first talked about. When it turned out to just be another centrifugal SC I didnt understand why everyone here was ever excited about it.
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07-23-2013, 12:08 PM
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Seriously. For years Ive been thinking "why doesnt someone slap a snowmobile CVT on a centrifugal compressor?"
18,
Its utilizing some kind of electronic control, so it could be as advanced as measuring boost, and maybe even compressor speed (optical or hall effect sensor perhaps?), and using that feedback to control speed.
But yes, at the most fundamental level, I believe it is running at a high ratio at low rpm, and then lowering the ratio as RPM increases, keeping the compressor speed constant.
Its like a backwards CVT
Im keeping an open mind
On one hand, the turbo isnt putting parasitic drag on the crank or adding inertia to the drivetrain, but on the other hand, without high pressure in the exhaust manifold, the supercharger will have better scavenging and allow for more aggressive tuning.
Im not sure how far these factors balance each other out.
Of course the turbo certainly wins when it comes to cost.
18,
Its utilizing some kind of electronic control, so it could be as advanced as measuring boost, and maybe even compressor speed (optical or hall effect sensor perhaps?), and using that feedback to control speed.
But yes, at the most fundamental level, I believe it is running at a high ratio at low rpm, and then lowering the ratio as RPM increases, keeping the compressor speed constant.
Its like a backwards CVT
Im keeping an open mind
On one hand, the turbo isnt putting parasitic drag on the crank or adding inertia to the drivetrain, but on the other hand, without high pressure in the exhaust manifold, the supercharger will have better scavenging and allow for more aggressive tuning.
Im not sure how far these factors balance each other out.
Of course the turbo certainly wins when it comes to cost.
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