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Posted for "George Braly" <gwbraly@gami.com>:
Terrence,
If you are not able to control the speed of the compressor wheel - - then you
have to figure out some other way to regulate the output pressure.
All other ways besides speed control introduce substantial inefficiencies.
The beauty of the exhaust gas turbine driven compressor wheel is that the use
of the pressure controlled feed back waste gate control to by-pass the
exhaust around the turbine wheel provides an automatic optimization of the
speed of the compressor to match it to the needs of the engine for manifold
pressure.
It becomes a nice "closed loop" and automatic control system for the
compressor.
Regards, George
"""
George,
WHY does it need to be variable speed?
Terrence O'Neill
LNC2 IO-320 N211AL
The fundamental problem with superchargers whose speed is a multiple of
the speed of the crank shaft is - -- the speed is a fixed multiple of the
crank shaft when it VERY VERY much needs to be a variable speed, not fixed.
"""
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