Gm Global Technolgoy Operations, Inc.

Mark D Finkel

Kevin C Wong

Carnell E Williams

Richard W Gushman

Timothy J Johnson

Jordan Bucklew Schwarz

Fengkun Wang

Roger Bennett

Kim Bloxsom

Stephanie A Cetnar

Joshua J Ksiazkiewicz

Steven M Hubble

A compressor assembly includes a compressor housing and a positive crankcase ventilation (PCV) tube. The compressor housing has an inlet port configured to receive intake air at ambient pressure, an outlet port configured to discharge pressurized air, and a hollow cylindrical section having an inner radial surface and an outer radial surface. The inner radial surface of the hollow cylindrical section defines the inlet port of the compressor housing. The PCV tube is configured to allow airflow between a crankcase of an engine and the inlet port of the compressor housing. The PCV tube extends through the hollow cylindrical section of the compressor housing and beyond the inner radial surface of the hollow cylindrical section.

Centrifugal compressor having positive crankcase ventilation tube extending through compressor housing to avoid high crankcase pressure

A control system for an engine includes a restriction determination module and a valve control module. The restriction determination module determines a desired exhaust back pressure of the engine based on an exhaust flow rate of the engine. The valve control module selectively adjusts a valve position of an exhaust valve that restricts an exhaust flow of the engine based on the desired exhaust back pressure. The exhaust valve may include a valve body, a throttle plate, and an annular protrusion coupled to an inner surface of the valve body and protruding towards the throttle plate. The annular protrusion may abut a side of the throttle plate and may restrict fluid flow through an annular space between the throttle plate and the inner surface when the throttle plate is positioned in a rotational position transverse to a direction of fluid flow. A related method is also provided.

Control system and method for controlling engine exhaust back pressure

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Macomb, MI, United States of America

Mark D Finkel