Polaris Industries Inc.

Daniel J Nugteren

G Jay McKoskey

Alexander W Oppermann

Anthony J Ripley

Michael John Bluhm

Jeffrey M Maher

C Scott Walter

John Lafata

David Hicke

Christopher J Hurd

Aaron D Deckard

Urs Wenger

Ricky G Jaeger

Hans-Rudolf Jenni

Stephen L Nelson

Adam J Schlangen

Shawn D Peterson

Daniel L Goffman

David J Hicke

Aaron J Nysse

Andrew C Schleif

Jason R Fields

David Andrew Galsworthy

Gordon J Steinmetz

Andy T Ives

Corrie S Roytek

Austin L Houkom

Curtis C Carruth

Phillip B Swain

James J Endrizzi

Bret Allen Oltmans

Chad Michael Slater

Chris J Hurd

Thomas C Hanegraaf

Gordon Raymond Nelson

Daniel P Strobach

Clinton A Johnson

George Jay McKoskey

Steven M Tittl

John A Kastanek

Aaron David Deckard

Eric D Bjerketvedt

Brian James Hitt

Ricky Jaeger

Blake Andrew Anderson

John LaFata

An engine is disclosed having a water cooling system allowing efficient cooling of the exhaust valves to prevent temperature gradients from building in the engine. Water is therefore pumped through the engine though first and second water cooling cores which discharge through the head. A water manifold is positioned over the discharge opening and includes couplings for the radiator supply, radiator return, water pump supply, oil cooler supply and oil cooler return. The engine has separate chambers to isolate the pistons and cylinders, and reed valves cover the chambers and allow the blow-by gases and oil to enter the oil pan during the power stroke of the engine cycle.

Engine

A utility vehicle includes a plurality of ground-engaging members, a frame supported by the ground-engaging members, and a powertrain assembly. The powertrain assembly includes an engine, a shiftable transmission, a continuously variable transmission, and a charger. Additionally, the utility vehicle may include a cooling assembly fluidly coupled to at least the engine and the charger.

Utility vehicle

An engine is described having a crankcase, a liner and a head assembly. The crankcase is split along a plane defining a two part crankcase, where fluid passages are passing through only one of the crankcase portions, so as to not require crossing the split line. A connecting rod also includes a tapered end, and the piston has a complementary carrier receiving the connecting rod.

Growing community of inventors

Chisago City, MN, United States of America

Daniel J Nugteren