Patent ID: 9401630
Filing Date: 2016-07-26
CPC Classification: F02B,H02K,H02P

Claim Text:
1. An electronically-controlled turbocharger (ECT), comprising: a turbine section including a turbine wheel; a compressor section including a compressor wheel; an electric machine including a rotor and a stator wherein the stator has a plurality of cores comprised of laminations with a plurality of coils wound around the cores; a shaft onto which the turbine wheel, the compressor wheel, and the rotor are affixed; a housing into which the electric machine is mounted; a first bearing mounted between the housing and the shaft proximate the turbine section; a second bearing mounted between the housing and the shaft proximate the compressor section; a pressurized oil supply passage defined in an outer surface of the housing; an oil manifold defined in the housing and fluidly coupled to the pressurized oil supply passage; a first oil passage fluidly coupling the oil manifold with the first bearing; a second oil passage fluidly coupling the oil manifold with the second bearing; an oil gallery provided between the housing and the stator by forming a groove in one of the housing and an outside surface of a back iron of the stator: a first normally-closed check valve disposed in the housing wherein an upstream side of the first check valve is fluidly coupled with the oil manifold and a downstream side of the first check valve is situated above a first end of one of the plurality of coils; and a second normally-closed check valve disposed in the housing wherein an upstream side of the second check valve is fluidly coupled with the oil manifold and a downstream side of the second check valve is situated above a second end of the one of the plurality of coils; wherein a third oil passage is provided between the oil manifold and the oil gallery and a plurality of orifices are defined through the stator back iron with one end of the orifices being proximate the oil gallery.