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US 9,719,463 B2Granted
Engine
AssigneePolaris Industries Inc.
InventorsBret Allen Oltmans, Chad Michael Slater, Daniel Joseph Nugteren, George Jay McKoskey, Gordon Raymond Nelson, David Andrew Galsworthy, Blake Andrew Anderson
Life of this patent
Estimating the term…
Abstract
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.
Claims38
An engine, comprising:
- a crankcase;
- a crankshaft journalled in the crankcase;
- a piston coupled to the crankshaft;
- a cylinder in which the piston reciprocates;
- a head positioned over the cylinder;
- a water pump assembly mounted to a first end of the crankshaft, and being drivingly coupled to the crankshaft, wherein the water pump assembly comprises a water pump housing positioned over the first end of the crankshaft and having an internal aperture that communicates with a corresponding internal aperture of the crankcase to form a flow path extending internally through the engine from the water pump assembly to the crankcase to deliver water to the crankcase, the water pump housing having an inner cavity defining an inner face, and an outer cavity, and an aperture extending between the inner and outer cavities, the water pump shaft being coaxial with, and attached at the end of the crankshaft;
- and
- a magneto drivingly coupled to the crankshaft and comprising a stator mounted within the inner cavity and a rotor coupled to the crankshaft and positioned within the inner cavity.
5 more elements
An engine, comprising:
- a crankcase;
- a crankshaft journalled in the crankcase and having first and second ends, the first end of the crankshaft extending through a wall of the crankcase;
- a piston coupled to the crankshaft;
- a cylinder in which the piston reciprocates;
- a head positioned over the cylinder;
- an oil pump assembly including an oil pump;
- a magneto comprised of a rotor and stator;
- and
- a water pump assembly including a water pump and a water pump housing having an inner surface coupled to the crankcase;
- the oil pump, the water pump and the magneto all being drivingly coupled to the first end of the crankshaft, the oil pump assembly being positioned between the wall of the crankcase and the inner surface of the water pump housing and being axially offset from the first end of the crankshaft, and the magneto and the water pump are axially aligned with the first end of the crankshaft.
7 more elements
Dependencies are inferred from the claim text.