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US 9,845,004 B2Granted
Snowmobile
AssigneePolaris Industries Inc.
InventorsDarren J. Hedlund, Jan R. Vistad, Dustin A. Mertens, Andrew J. Mills
Life of this patent
Estimating the term…
Abstract
A snowmobile includes a chassis, an engine positioned in a front chassis portion and having at least one intake port and at least one exhaust port, an air intake system coupled to the intake port and comprising a duct being at least partially comprised of a porous material, and an exhaust system comprising an exhaust pipe having a stinger tube and a rear cone which are curved, with centerlines of the stinger tube and rear cone being concentric.
Claims21
A snowmobile, comprising:
- a chassis;
- an engine positioned in a front chassis portion and having at least one intake port and at least one exhaust port;
- an air intake system coupled to the intake port and comprising a duct being at least partially comprised of a porous material;
- and
- an exhaust system comprising an exhaust pipe having a stinger tube and a rear cone which are curved, with centerlines of the stinger tube and rear cone being concentric, and the rear cone includes an expansion chamber having a first diameter, an inlet having a second diameter which is less than the first diameter, and an outlet with a third diameter which is less than the first diameter, and the stinger tube extends from the outlet into the expansion chamber, and the expansion chamber is positioned intermediate the inlet and the outlet of the rear cone, and the stinger tube includes an inlet and an outlet, and the inlet is positioned adjacent the expansion chamber and the outlet of the stinger tube is coupled to the outlet of the rear cone, and the stinger tube has a substantially constant diameter extending between the inlet and the outlet.
2 more elements
An exhaust pipe, comprising:
- a rear cone, and
- a stinger tube extending into the rear cone, wherein the stinger tube and rear cone are curved, with centerlines of the stinger tube and rear cone being concentric, and the rear cone includes an expansion chamber having a first diameter, an inlet having a second diameter which is less than the first diameter, and an outlet with a third diameter which is less than the first diameter, and the stinger tube extends from the outlet into the expansion chamber, and the expansion chamber is positioned intermediate the inlet and the outlet of the rear cone, and the stinger tube includes an inlet and an outlet, and the inlet is positioned adjacent the expansion chamber and the outlet of the stinger tube is coupled to the outlet of the rear cone, and the stinger tube has a substantially constant diameter extending between the inlet and the outlet.
Dependencies are inferred from the claim text.