Four stroke engine with intake manifold
AssigneeBombardier-Rotax GmbH
InventorsAndreas Bilek, Alois Wolfsgruber, Markus Hochmayr
Life of this patent
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Abstract
The four stroke internal engine having an air intake system connected to the cylinder head and operatively connected to the intake passageway. The air intake system includes an air intake manifold having symmetrical construction with a central air passageway extending between a first end and a second end. At least one passageway extends from the central air passageway to a free end, which is operatively coupled to the intake passageway. The air intake system is usable for both a supercharged and normally aspirated engines.
Claims43
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;
- at least one intake valve for the at least one cylinder;
- at least one exhaust valve for 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;
- at least one air intake passageway operatively coupled to the at least one cylinder through the at least one intake valve;
- and
- an air intake system connected to the cylinder head and operatively connected to the at least one air intake passageway, the air intake system comprising
- an air intake manifold having a central air passageway extending between a first end and a second end and at least one passageway extending from the central air passageway to a free end, and
- a flame arrester positioned between the first end and the second end within the air intake manifold,
- wherein the air intake manifold has a generally symmetrical construction, and
- wherein the free end of the at least one passageway is operatively connected to the at least one air intake passageway.
An air intake system for an engine, comprising:
- an air intake manifold having a central air passageway extending between a first end and a second end and at least one passageway extending from the central air passageway to a free end, wherein the free end of the at least one passageway is adapted to be connected to the at least one air intake passageway;
- an air inlet connected to one of the first opening and the second opening;
- a throttle connected to the air inlet, wherein the throttle regulates the flow of air into the air intake manifold;
- and
- a flame arrester positioned between the first end and the second end within the air intake manifold.
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,
- at least one intake valve for the at least one cylinder,
- at least one exhaust valve for 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,
- at least one air intake passageway operatively coupled to the at least one cylinder through the at least one intake valve, and
- an air intake system connected to the cylinder head and operatively connected to the at least one air intake passageway, the air intake system comprising
- an air intake manifold having a central air passageway extending between a first end and a second end and at least one passageway extending from the central air passageway to a free end, and
- a flame arrester positioned between the first end and the second end within the air intake manifold,
- wherein the air intake manifold has a generally symmetrical construction, and
- wherein the free end of the at least one passageway is operatively connected to the at least one air intake passageway.
Dependencies are inferred from the claim text.