Caterpillar Inc.

Joshua David Keyes

Christopher Ronald Gehrke

Paul Frederick Olsen

William Lyle Schell

An engine system is disclosed. The engine system has an engine block having at least one combustion chamber and at least partially defining a crankcase. The engine system also has an inlet conduit connecting a compressor of a turbocharger with the at least one combustion chamber. The engine system further has an exhaust conduit connecting a turbine of the turbocharger with the combustion chamber and a ventilation conduit connecting the crankcase with the exhaust conduit. The engine system also has a controller in communication with the turbocharger, the controller being configured to adjust the geometry of the turbocharger to maintain a pressure of the crankcase lower than a pressure of the inlet conduit.

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East Peoria, IL, United States of America

Joshua David Keyes