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US 6,568,376 B2Granted
Four stroke engine having a supercharger
AssigneeBombardier-Rotax GmbH
InventorsMichael Sonnleitner, Norbert Korenjak, Markus Hochmayr
Life of this patent
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Abstract
A supercharged four stroke internal combustion engine. The engine includes a power take off housing located on one end of the crankcase. A supercharger for boosting air intake to an air intake manifold is mounted to the power take off and operatively connected to the crank shaft within the power take off housing. A personal watercraft having a supercharged engine is also disclosed.
Claims40
A supercharged four stroke internal combustion engine, comprising:
- a crankcase having a crank shaft rotatably mounted therein, wherein the crankcase having a top, a bottom, a pair of sides and a pair of ends;
- a cylinder head connected to the crankcase, wherein the crankcase and the cylinder head form at least one combustion cylinder chamber;
- at least one intake valve for each of the combustion cylinder chambers;
- at least one exhaust valve for each of the combustion cylinder chambers;
- a valve actuation assembly located in the cylinder head for operating the at least one intake valve and the at least one exhaust valve;
- at least one air intake passageway operatively coupled to the combustion cylinder chambers through the intake valves;
- an air intake manifold connected to the cylinder head and operatively connected to the at least one air intake passageway;
- a power take off housing located on one of the pair of ends of the crankcase, wherein the crank shaft extends into the power take off housing, wherein the crank shaft is operatively coupled to an output shaft for power take off;
- and
- a supercharger for boosting air to the air intake manifold,
- wherein the supercharger is mounted to the power take off housing and is operatively connected to the crank shaft within the power take off housing, wherein the air intake manifold comprises:
- a central air passageway, wherein the central air passageway is operatively connected to the supercharger.
9 more elements
A supercharged four stroke internal combustion engine, comprising:
- a crankcase having a crank shaft rotatably mounted therein, wherein the crankcase having a top, a bottom, a pair of sides and a pair of ends;
- a cylinder head connected to the crankcase, wherein the crankcase and the cylinder head form at least one combustion cylinder chamber;
- at least one intake valve for each of the combustion cylinder chambers;
- at least one exhaust valve for each of the combustion cylinder chambers;
- a valve actuation assembly located in the cylinder head for operating the at least one intake valve and the at least one exhaust valve;
- at least one air intake passageway operatively coupled to the combustion cylinder chambers through the intake valves;
- an air intake manifold connected to the cylinder head and operatively connected to the at least one air intake passageway;
- a power take off housing located on one of the pair of ends of the crankcase, wherein the crank shaft extends into the power take off housing, wherein the crank shaft is operatively coupled to an output shaft for power take off;
- and
- a supercharger for boosting air to the air intake manifold, wherein the supercharger is mounted to the power take off housing and is operatively connected to the crank shaft within the power take off housing, wherein the supercharger includes a mounting portion, wherein the mounting portion is attached to the power take off housing, wherein the mounting portion is positioned within a mounting opening in the power take off housing, wherein at least one sealing ring is provided between the mounting portion and the mounting opening in the power take off housing.
7 more elements
A supercharged four stroke internal combustion engine, comprising:
- a crankcase having a crank shaft rotatably mounted therein, wherein the crankcase having a top, a bottom, a pair of sides and a pair of ends;
- a cylinder head connected to the crankcase, wherein the crankcase and the cylinder head form at least one combustion cylinder chamber;
- at least one intake valve for each of the combustion cylinder chambers;
- at least one exhaust valve for each of the combustion cylinder chambers;
- a valve actuation assembly located in the cylinder head for operating the at least one intake valve and the at least one exhaust valve;
- at least one air intake passageway operatively coupled to the combustion cylinder chambers through the intake valves;
- an air intake manifold connected to the cylinder head and operatively connected to the at least one air intake passageway;
- a power take off housing located on one of the pair of ends of the crankcase, wherein the crank shaft extends into the power take off housing, wherein the crank shaft is operatively coupled to an output shaft for power take off;
- and
- a supercharger for boosting air to the air intake manifold, wherein the supercharger includes a mounting portion, wherein the mounting portion is attached to the power take off housing, wherein the supercharger is mounted to the power take off housing and is operatively connected to the crank shaft within the power take off housing, wherein the supercharger comprises:
- an inlet portion having an inlet opening for drawing a stream of air, wherein the inlet portion is connected to the mounting portion;
- and
- an air passageway extending from the inlet opening to the air intake manifold, wherein the air intake manifold comprises an air intake passageway, and a plenum connected to the air intake passageway, wherein the air intake passageway is operatively connected to the air passageway of the supercharger assembly.
10 more elements
A personal watercraft, comprising:
- a hull;
- a seating assembly;
- and
- a four stoke internal combustion engine secured to the hull below the seating assembly, wherein the engine comprises:
- a crankcase having a crank shaft rotatably mounted therein, wherein the crankcase having a top, a bottom, a pair of sides and a pair of ends;
- a cylinder head connected to the top of the crankcase, wherein the crankcase and the cylinder head form at least one combustion cylinder chamber;
- at least one intake valve for each of the combustion cylinder chambers;
- at least one exhaust valve for each of the combustion cylinder chambers;
- a valve actuation assembly located in the cylinder head for operating the at least one intake valve and the at least one exhaust valve;
- at least one air intake passageway operatively coupled to the combustion cylinder chambers through the intake valves;
- an air intake manifold connected to the cylinder head and operatively connected to the at least one air intake passageway;
- a propulsion unit operatively coupled to the crankshaft, wherein the propulsion unit being located on one end of the pair of ends of the crankcase;
- and
- a supercharger for boosting air to the air intake manifold, wherein the supercharger is located at one of the pair of ends of the crankcase, wherein the supercharger is located on the same end of the crankcase as the propulsion unit.
11 more elements
A supercharged four stroke internal combustion engine, comprising:
- a crankcase having a crank shaft rotatably mounted therein, wherein the crankcase having a top, a bottom, a pair of sides and a pair of ends;
- a cylinder head connected to the crankcase, wherein the crankcase and the cylinder head form at least one combustion cylinder chamber;
- at least one intake valve for each of the combustion cylinder chambers;
- at least one exhaust valve for each of the combustion cylinder chambers;
- a valve actuation assembly located in the cylinder head for operating the at least one intake valve and the at least one exhaust valve;
- at least one air intake passageway operatively coupled to the combustion cylinder chambers through the intake valves;
- an air intake manifold connected to the cylinder head and operatively connected to the at least one air intake passageway;
- a power take off housing located on one of the pair of ends of the crankcase, wherein the crank shaft extends into the power take off housing, wherein the crank shaft is operatively coupled to an output shaft for power take off, and
- a supercharger for boosting air to the air intake manifold, wherein the supercharger is a centrifugal type blower supercharger, wherein the supercharger has a spiral housing,
- wherein the supercharger is mounted to the power take off housing and is operatively connected to the crank shaft within the power take off housing.
7 more elements
Dependencies are inferred from the claim text.