Borgwarner Inc.

Robert Shawn Lebold

Steve Roby

A method and device for maintaining air boost system performance is provided. One or more stages of the air boost system can be connected by tubing to a cleaning system that includes a fluid reservoir () containing cleaning fluid and a means of conveying the cleaning fluid into at least one stage of the air boost system. The air boost system can also include a means for detecting () at least one fouling parameter of said air boost system. Mien the fouling parameter meets a pre-determined condition, a control means () can trigger the cleaning means and inject cleaning fluid into the stage or stages to be cleaned.

Automatic compressor stage cleaning for air boost systems

A total pressure exhaust gas recirculation duct system includes a turbocharger having a turbine inlet scroll, an exhaust gas recirculation duct and a valve assembly disposed between a port and inlet scroll and the inlet to the exhaust gas recirculation duct. The valve is situated so that the valve blade member extends from the inlet scroll port into the exhaust gas stream to divert a portion of the exhaust gas into the EGR duct. The valve has a pivot shaft disposed within a corresponding channels of the inlet scroll housing and the EGR duct with a free end extending beyond the inlet scroll and the EGR duct for actuation of the valve. Alternatively, the valve can include a blade element attached to the distal end of an actuating rod and positioned in the port of the inlet scroll. The proximal end of the actuation rod extends through a passageway in the EGR duct or the inlet scroll for actuation of the valve. An electronic control unit actuates the valve in conjunction with pressure sensors monitoring intake gas and exhaust gas pressures and other engine condition sensors. The volume of exhaust gas diverted to the EGR duct is varied to maintain the pressure of the diverted exhaust gas at an appropriate level for mixing with the intake gas.

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Indianapolis, IN, United States of America

Robert Shawn Lebold