Chrysler calls it a Variable Geometry Turbine (VGT). It's an exhaust gas driven turbocharger that has electrically adjustable turbine blades that can provide low volume high velocity boost at launch, as well as prodigious air quantity at high engine speed.
VGT turbocharger
by Christine & Scott Gable
for About.comThe 3.0-liter CRD Jeep Cherokee is outfitted with a single variable geometry turbocharger.
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