Polaris Industries Inc.

James H Buchwitz

Lucas R Salfer

Darren J Hedlund

Derek D Zimney

Reed A Hanson

Dallas J Blake

Chad A Dale

Daniel E Erickson

Alexander M Hetteen

Sean M Trihey

Jon P Brandt

Joseph D Tharaldson

James A Barczak

Karsten Scholle

Tim Keller

Marcel Semrau

Eric L Gausen

Andreas H Bilek

Stephen G Crain

G Jay McKoskey

Nathan D Dahl

David F Buehler

Markus Hoffet

Angus M Morison

Trevor F Rhodes

Ralph W Lauzze, Iii

Yassin M Kelay

Philippe Gasdia

Ricky Jaeger

Beat R Kohler

Ryan W Sorenson

Dean J Hedlund

Ronnie R Danielson

Ron R Danielson

Jacob D Hanson

Chad M Cunningham

Nicholas A M Hartung

Derek Zimney

Clifton J Seusy

Garrett J Hebbard

Derek J Fitzpatrick

Ross Liberty

William J Bryant

Christopher P Scremin

Christopher R Benning

Steven R Hanson

Colton Ross

Iii Lauzze Ralph W

Ron Danielson

Ralph W Lauzze

Systems and methods for starting and restarting an engine of a vehicle are disclosed. Power systems for an engine are disclosed.

Systems and methods for engine start

A system for a vehicle has an oil supply, an engine oil pump comprising a plurality of ports and an engine coupled to the plurality of ports. A turbocharger is coupled to the engine. A turbocharger oil pump is coupled to the oil supply comprising a first port coupled to the turbocharger.

Turbocharger lubrication system for a two-stroke engine

A method and system for controlling operation of a two-stroke engine having a turbocharger includes the two-stroke engine comprising an electronically controlled exhaust valve. A throttle position sensor generates a throttle position signal corresponding to a position of a throttle plate of a throttle. A boost box is coupled to the two-stroke engine. A boost box pressure sensor is coupled to the boost box and generates a boost box pressure signal corresponding to a pressure within the boost box. A controller is coupled to the boost box pressure signal controlling a position of the electronically controlled exhaust valve in response to the boost box pressure signal and the throttle position signal.

System and method for controlling operation of a two-stroke engine having a turbocharger

A turbocharger and method of controlling the same includes a turbine housing comprising an inlet and an outlet, turbine wheel coupled to a shaft. The turbine housing comprising a first scroll and a second scroll for fluidically coupling the inlet and the turbine wheel. The first scroll has a first end adjacent the inlet and a second end adjacent the turbine wheel. The second scroll has a third end adjacent the inlet and a fourth end adjacent the turbine wheel. An exhaust gas diverter valve is coupled to the turbine housing restricting flow into the first scroll or the second scroll.

Turbocharger system for a two-stroke engine

A method and system for controlling a wastegate comprises determining a boost pressure target, measuring a boost pressure, determining a boost pressure error from the measured boost pressure and the boost pressure target, determining a wastegate position change based on boost pressure error, and changing the wastegate position corresponding to the wastegate position change.

Method and system for controlling a turbocharged two stroke engine based on boost error

A method and system for operating a two-stroke engine includes a fuel system comprising a fuel pressure sensor, fuel temperature sensor and a fuel injector and a controller in communication with the fuel pressure sensor and fuel temperature sensor. The controller controls the fuel injector with a fuel pulsewidth determined by determining a beginning time of a window for measuring fuel pressure, determining an ending time of the window, measuring fuel pressure between the beginning time and the ending time, determining a fuel pulsewidth based on the fuel pressure and fuel temperature and injecting fuel into the two-stroke engine in response to a desired fuel mass.

Method and system for controlling a two stroke engine based on fuel pressure

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 system includes a housing comprising a first housing portion and a second housing portion separated by a common wall. The first housing portion has a first exhaust passage therethrough. The first exhaust passage has a first inlet receiving exhaust gasses from a turbocharger. The second housing portion has a second exhaust passage therethrough. The second exhaust passage has a second inlet receiving gasses from an exhaust bypass valve. The first passage and the second passage are non-intersecting within the housing.

Two-passage exhaust system for an engine

A system and method of operating the same includes an engine speed sensor determining an engine speed, an exhaust gas bypass valve, an exhaust gas bypass valve actuator coupled to the exhaust gas bypass valve and a controller. The controller partially opens the exhaust gas bypass valve with a first predetermined effective area greater than fully closed when the engine speed is at idle. The controller determines an acceleration event, holding the exhaust gas bypass valve open at least a second predetermined effective area greater than fully closed in response to the acceleration event.

Exhaust gas bypass valve control for a turbocharger for a two-stroke engine

An exhaust system for a vehicle including a deep snow exhaust outlet defined by a driveline structural member of the vehicle. If the vehicle includes a turbo charger and an exhaust silencer, the turbocharger and the exhaust silencer are coupled together without exhaust piping therebetween.

Exhaust system for a vehicle

Growing community of inventors

Strathcona, MN, United States of America

James H Buchwitz