An electrically controlled turbocharger having a substantially vertically
oriented shaft interconnecting a turbine and a compressor. The vertical
orientation serves to eliminate the effects of gravity on the rotating
components. Placing the turbine vertically above the motor and compressor
and provides additional cooling through convection of heat produced by
hot exhaust gas flowing through the turbine. A lubricating system
utilizes scavenged air from the compressor to draw lubricating oil
through internal passages of the motor housing to maintain a desirable
oil sump level, ventilate the auxiliary induction motor, and provide
pressure to the oil seals of the motor cavity.