Polaris Industries Inc.

Jon P Brandt

Reed A Hanson

Darren J Hedlund

James H Buchwitz

Lucas R Salfer

Derek D Zimney

Sean M Trihey

Chad A Dale

Daniel E Erickson

Alexander M Hetteen

James A Barczak

Joseph D Tharaldson

Dallas J Blake

Eric L Gausen

Steven R Hanson

Ralph W Lauzze

A system and method of controlling a turbocharged engine system includes receiving a boost mode selection signal and controlling the turbocharged engine system in response to the boost mode selection signal.

Turbocharger system for a two-stroke engine having selectable boost modes

An exhaust gas diverter valve coupled within a pipe comprises a housing having a passage therethrough, a valve member rotatably coupled within the housing the valve member rotates about a valve axis. A first valve seat mat be disposed partially circumferentially within said passage and extending radially inwardly.

Exhaust gas bypass valve system for a turbocharged engine

An engine system and method of operating the same includes a two stroke engine, an exhaust manifold coupled to the two-stroke engine, a tuned pipe coupled to the exhaust manifold coupled to the exhaust manifold, a stinger pipe coupled to the tuned pipe, a silencer coupled to the tuned pipe and an exhaust pipe, and an exhaust bypass valve. Exhaust gases are directed from the two stroke engine through an exhaust manifold and through a tuned pipe. An opening of the exhaust bypass valve is changed to redirect exhaust gases away from the tuned pipe to change a pressure within the tuned pipe. In response to changing the opening of the exhaust bypass valve, the airflow through the engine is changed.

Method and system for controlling pressure in a tuned pipe of a two stroke engine

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Roseau, MN, United States of America

Jon P Brandt