Patent ID: 8459022
Filing Date: 2013-06-11
Classification: F01D,F02B,F02C

Abstract:
1. A method comprising: providing a controller and a turbocharger assembly that comprises a compressor and an exhaust turbine to extract energy from exhaust of an internal combustion engine and thereby provide energy via the compressor to intake air to increase performance of the internal combustion engine, performing a closing operation via the controller to change shape of the ridge by rotating the shaft portion in the bore of the housing to force the ridge against the wastegate seat to enhance sealing of the wastegate opening by the plug portion; and calling for opening or closing of the wastegate opening via the controller responsive to one or more engine operating conditions wherein opening allows for flow of exhaust from the exhaust volute chamber to the wastegate chamber to reduce extraction of energy from exhaust by the exhaust turbine.