Probably an electro-hydraulic actuator something like a Moog valve.
I have read that too but it was not from Kawasaki and from what I have seen yet there is nothing showing me that there is a two speed drive system for the supercharger. It is a direct drive chaine with a simple planetary gear box so I suspect that the super charger pressure will be control by a electrovalve control by the ECU via a pressure sensor.I believe I've read that the supercharger will have two drive speeds. Does anyone have info on how the drive ratio will be changed between the two speeds?
No..that's why it has 3 planet gears = 2 speeds.I highly doubt it's that complicated. I imagine it is just a controllable bypass from intake to pressurized box.
That would require a planet carrier. Not present in the pics. I saw this thing in person at a motorcycle show, including the cutaway engine.No..that's why it has 3 planet gears = 2 speeds.
The gear train increases the impeller speed up to 9.2x the crank speed (1.15x step gear with an 8x planetary gear). This means at a maximum engine speed of approximately 14,000rpm, the impeller shaft is spinning at almost 130,000rpm.
a relief valve (68) that adjusts the air pressure in the supercharged air duct (62); The exhaust outlet (68b) of the relief valve (68) is contained in the air cleaner (36).
If you look closely the planet gear at the upper right is not in mesh with the sun gear. Pics are not showing the mounting plate because it's ugly and people want to see gears more than a flat plate with an actuator attached.That would require a planet carrier. Not present in the pics. I saw this thing in person at a motorcycle show, including the cutaway engine.
That exactly what I thought. It would be way to complicated and subject to failure to do a systeme that change the ratio each time you cross a dedicated RPM and over that it would need to be different from the H2R and H2. A lot easyer and cheaper to work with a electrovalve (wastegate) and the good new is that a simple change in the parameter in the ECU will let you change the desire output pressure at a given RPM even a third party company could altered the voltage from the pressure sensor and the electrovalve to obtain a desire output pressure from the supercharger exactly the same way they do with fuel injector.Wikipedia mentions a 2-speed supercharger, but only cites this cycleworld article as source, which is just making guesses based on earlier patent application leaks.
Those patent leaks, here and here, make no mention of such a system. In fact, the patent specifically talks about a relief valve, aka a way to regulate pressure by bleeding some of the air off.