Four-stroke cycle internal combustion engine
AssigneeKioritz Corporation
InventorYumin Liu
Life of this patent
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Abstract
In a compression stroke and an exhaust stroke, a part of a mixture in a downstream intake passage 30b is introduced through a branch intake passage 50a into a crank chamber 20. The mixture introduced into the crank chamber 20 flows into a valve chamber 16 during the expansion stroke and the intake stroke. From which it flows back to an intake port 9 through a circulation passage 71, and is eventually charged into a combustion chamber 7 during the intake stroke. As the mixture passes through a first communicating passage 55 which allows fluid communication between the crank chamber 20 and the valve chamber 16, a gasoline component which is vaporized with comparative easy is vaporized by a heat released from a cylinder block 3 so that the mixture is separated into the lubricating oil and gasoline components.
Claims4
A four-stroke cycle internal combustion engine whose inside is lubricated using a mixed fuel with a lubricant added thereto, said four-stroke cycle internal combustion engine comprising:
- a crankshaft;
- a crank chamber for accommodating said crankshaft;
- a cylinder block;
- a cylinder head;
- a valve chamber provided in said cylinder head;
- a combustion chamber;
- and
- a path extending from a point at which said mixed fuel is introduced into said engine to a point before charging said mixed fuel into said combustion chamber, whereby a fuel component included in said mixed fuel is vaporized by heating it in said path utilizing heat released from said engine;
- wherein said path includes a first communicating passage which is in communication with said crank chamber and said valve chamber, said first communicating passage being formed in said cylinder block, wherein said engine is adapted to vaporize said fuel component included in said mixed fuel by heating said mixed fuel passing through said first communicating passage with heat released from said cylinder block.
Dependencies are inferred from the claim text.