Pressurized oil system powered by two-stroke engine
AssigneeArctic Cat Inc.
InventorsAlexander Konrad Fuhrman, Ryan Douglas Hayes, Andrew Jon Ellsworth, Cord Miller Christensen, David Mark Sabo, Derek Robert Kvenvold
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Abstract
A two-stroke engine comprises a first oiling system and a second oiling system. The first oiling system includes a low-pressure pump that distributes oil from a first oil tank to the two-stroke engine. The second oiling system includes a pump mechanically coupled to a crankshaft of the two-stroke engine, wherein the pump distributes oil from a second oil tank to an accessory at a pressure greater than the first oil pressure, wherein oil distributed to the accessory is returned to the second oil tank.
Claims15
A closed loop oiling system for a two-stroke engine, the closed loop oiling system comprising:
- a pressure pump mechanically coupled to a crankshaft of the two-stroke engine via a shaft to distribute pressurized oil from a first oil reservoir;
- an oil pressure regulator to regulate oil pressure;
- a first accessory, wherein the first accessory utilizes the pressurized oil and the pressurized oil returns to a scavenge pump reservoir;
- and
- a scavenge pump mechanically coupled to the crankshaft of the two-stroke engine via the shaft to return the oil from the scavenge pump reservoir to the first oil reservoir wherein the pressure pump and the scavenge pump are located directly adjacent to one another in a stacked configuration along an axis perpendicular to an axis defined through the crankshaft.
A two-stroke engine comprising:
- a closed loop oiling system that includes a pressure pump mechanically coupled to a crankshaft of the two-stroke engine to distribute pressurized oil from an oil reservoir;
- a first accessory, wherein the first accessory utilizes the pressurized oil;
- and
- a cooling circuit that includes an intercooler connected to receive compressed air from the first accessory, a heat exchanger, and a coolant pump, wherein the cooling circuit circulates coolant in a coolant flow path, the coolant flow path comprising a coolant flow from the heat exchanger to the intercooler, from the intercooler to the two-stroke engine, and from the two-stroke engine to the heat exchanger, wherein the coolant flow path comprises a plurality of coolant loops and wherein a first coolant loop provides coolant from the heat exchanger to the intercooler, and a second coolant loop provides coolant from the coolant pump to a throttle body.
A cooling circuit for a two-stroke engine, the two-stroke engine comprising a first accessory, the cooling circuit comprising:
- a coolant pump for pumping coolant through a coolant flow path;
- an intercooler connected to receive compressed air from the first accessory, wherein the intercooler receives coolant via a coolant inlet port, coolant is directed through the intercooler, and coolant exits the intercooler via a coolant output port;
- and
- a heat exchanger for cooling the coolant, wherein the coolant flow path provides coolant from the heat exchanger to the intercooler, and then subsequently from the intercooler to other components of the two-stroke engine,
- wherein the coolant flow path is a closed-loop system.
Dependencies are inferred from the claim text.