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US 2002/0000224 A1Published application
Four stroke engine having blow-by ventilation system and lubrication system
AssigneeBombardier-Rotax GmbH
InventorsRudolf Tscherne, Alois Wolfsgruber, Roland Ennsmann
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Abstract
A four stroke internal combustion engine is disclosed having a lubrication system for circulating lubricant within the engine. The engine further include a system for separating lubricant from blow-by gas within the crank case.
Claims73
A four stroke internal combustion engine, comprising:
- a crankcase;
- a cylinder head connected to the crankcase, wherein the crankcase and the cylinder head form at least one cylinder, wherein the crankcase includes at least one crank chamber located below the cylinder;
- a crankshaft rotatably mounted within the crankcase, wherein the crankshaft extends through the at least one crank chamber;
- at least one intake valve for the at least one cylinder;
- at least one exhaust valve for the of the at least one cylinder;
- a valve actuation assembly located in the cylinder head for operating the at least one intake valve and the at least one exhaust valve;
- a dry sump lubrication system;
- and
- a lubrication tank formed in the crankcase.
6 more elements
The four stroke internal combustion engine according to claim 33, further comprising:
- a lubricant nozzle located within the crank chamber beneath the cylinder piston, wherein the lubricant nozzle directs a stream of lubricant on the cylinder piston.
A personal watercraft for use by at least one passenger, comprising:
- a hull;
- a seating assembly for the at least one passenger;
- and
- a four stroke internal combustion engine located within the hull, wherein the engine comprises
- a crankcase secured to the hull;
- a cylinder head connected to the crankcase, wherein the crankcase and the cylinder head form at least one cylinder, wherein the crankcase includes at least one crank chamber located below the cylinder;
- a crankshaft rotatably mounted within the crankcase, wherein the crankshaft extends through the at least one crank chamber;
- at least one intake valve for the at least one cylinder;
- at least one exhaust valve for the of the at least one cylinder;
- a valve actuation assembly located in the cylinder head for operating the at least one intake valve and the at least one exhaust valve;
- a dry sump lubrication system;
- and
- a lubrication tank formed in the crankcase.
10 more elements
Dependencies are inferred from the claim text.