Four-cycle engine and motorcycle comprising four-cycle engine
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsYoshimoto Matsuda, Seiji Azuma
Life of this patent
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Abstract
A four-cycle engine of the present invention comprises a gas exhaust outlet that is formed on an upper region of a crankcase to exhaust a gas from the interior of the crankcase to outside; and a rotatable shaft disposed in close proximity to the gas exhaust outlet in the interior of the crankcase. The gas exhaust outlet is configured to open toward a region in the interior of the crankcase, the region extending from a line segment connecting the gas exhaust outlet to a rotational center axis of the shaft, in a rotational direction of the shaft at a cross point where the line segment crosses an outer peripheral surface of the shaft.
Claims6
A four-cycle engine comprising:
- a gas exhaust outlet that is formed on an upper region of a crankcase and is configured to open toward an interior of the crankcase so as to exhaust a gas from an interior of the crankcase to outside;
- and
- a rotatable shaft disposed in close proximity to the gas exhaust outlet in the interior of the crankcase;
- wherein the gas exhaust outlet is formed so that an opening direction which conforms to a direction in which the gas flows through a center point at the gas exhaust outlet is toward a region in the interior of the crankcase, the region extending from a line segment connecting the gas exhaust outlet to a rotational center axis of the shaft, in a rotational direction of the shaft at a cross point where the line segment crosses an outer peripheral surface of the shaft.
A motorcycle comprising a four-cycle engine,
- the engine including:
- a gas exhaust outlet that is formed on an upper region of a crankcase and is configured to open toward an interior of the crankcase so as to exhaust a gas from an interior of the crankcase to outside;
- and
- a rotatable shaft disposed in close proximity to the gas exhaust outlet in the interior of the crankcase;
- wherein the gas exhaust outlet is formed so that an opening direction which conforms to a direction in which the gas flows through a center point at the gas exhaust outlet is toward a region in the interior of the crankcase, the region extending from a line segment connecting the gas exhaust outlet to a rotational center axis of the shaft, in a rotational direction of the shaft at a cross point where the line segment crosses an outer peripheral surface of the shaft.
Dependencies are inferred from the claim text.