Four stroke engine with cooling system
AssigneeBombardier-Rotax GmbH
InventorsRudolf Tscherne, Alois Wolfsgruber
Life of this patent
Estimating the term…
Abstract
A four stroke internal combustion engine having cooling system for cooling the engine is disclosed. The cooling system includes a closed loop cooling system for cooling at least a portion of the engine. The cooling system also includes an open loop cooling system for cooling at least a portion of the engine. The open loop cooling system uses coolant from an external source (e.g., a body of water) to cool the engine.
Claims65
A four stroke internal combustion engine, comprising:
- a crankcase;
- a cylinder head connected to the crankcase,
- wherein the cylinder head and the crankcase together form at least one cylinder, and
- wherein the at least one cylinder includes at least one intake valve and at least one exhaust valve;
- a valve actuation assembly for operating the at least one intake valve and the at least one exhaust valve for the at least one cylinder;
- and
- a cooling system for cooling the engine, wherein the cooling system comprising
- a closed loop cooling system for cooling at least a portion of the engine having at least one coolant passageway extending around at least a portion of the at least one cylinder,
- wherein the coolant passageway is adapted to contain coolant to remove heat generated by the cylinder during operation, and
- an open loop cooling system for cooling at least a portion of the engine.
A personal watercraft, comprising:
- a hull;
- a seat assembly located on the hull and adapted to accommodate at least one passenger;
- and
- a four stroke internal combustion engine located within the hull, wherein the internal combustion engine comprises
- a crankcase secured to the hull,
- a cylinder head connected to the crankcase,
- wherein the cylinder head and the crankcase together form at least one cylinder, and
- wherein the at least one cylinder includes at least one intake valve and at least one exhaust valve;
- a valve actuation assembly for operating the at least one intake valve and the at least one exhaust valve for the at least one cylinder;
- and
- a cooling system for cooling the engine, wherein the cooling system comprising
- a closed loop cooling system for cooling at least a portion of the engine having at least one coolant passageway extending around at least a portion of the at least one cylinder,
- wherein the coolant passageway is adapted to contain coolant to remove heat generated by the cylinder during operation, and
- an open loop cooling system for cooling at least a portion of the engine.
A cooling system for an internal combustion engine, the internal combustion engine having a crankcase, a cylinder head connected to the crankcase, wherein the cylinder head and the crankcase together form at least one cylinder, wherein the at least one cylinder includes at least one intake valve and at least one exhaust valve, a valve actuation assembly, and an engine control system, the cooling system comprising:
- a closed loop cooling system for cooling at least a portion of the engine having at least one coolant passageway extending around at least a portion of the at least one cylinder,
- wherein the coolant passageway is adapted to contain coolant to remove heat generated by the cylinder during operation;
- and
- an open loop cooling system for cooling at least a portion of the engine.
Dependencies are inferred from the claim text.