Casing structure for an internal combustion engine
AssigneeHonda Motor Co., Ltd.
InventorsToru Kisaichi, Hiroshi Sotani
Life of this patent
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Abstract
A casing structure of an automotive internal combustion engine includes an upper/lower divided crankcase structure. A crankshaft and a first transmission shaft of a pair of transmission shafts parallel to the crankshaft of a transmission are axially supported by a dividing surface of the upper crankcase and the lower crankcase. The dividing surface of the crankcase is inclined so that a second transmission shaft axially supported by the upper crankcase above the first transmission shaft is below the crankshaft. A cylinder is formed on the upper crankcase so that a cylinder axial line is orthogonal to the dividing surface.
Claims20
A casing structure of an internal combustion engine comprising an upper/lower divided crankcase structure in which a crankshaft and a first transmission shaft of a pair of transmission shafts parallel to the crankshaft of a transmission are supported at a dividing surface between an upper crankcase and a lower crankcase,
- the dividing surface being inclined so that a second transmission shaft supported by the upper crankcase above the first transmission shaft is below the crankshaft, and
- a cylinder is formed in the upper crankcase so that a cylinder axial line is orthogonal to the dividing surface.
A casing structure of an internal combustion engine comprising:
- a divided crankcase having an upper crankcase and a lower crankcase attachable together at a dividing surface, the divided crankcase configured for supporting a crankshaft and a first transmission shaft at the dividing surface, the upper crankcase configured for supporting a second transmission shaft above the first transmission shaft such that the second transmission shaft is parallel to the first transmission shaft;
- and
- a cylinder disposed in the upper crankcase such that an axial line of the cylinder is orthogonal to the dividing surface.
A casing structure of an internal combustion engine comprising:
- a divided crankcase having an upper crankcase and a lower crankcase attachable together at a dividing surface;
- and
- an oil pan having a bottom wall that is configured to be horizontal when the internal combustion engine is installed in a vehicle;
- wherein the divided crankcase is configured such that the dividing surface is inclined with respect to the bottom wall.
Dependencies are inferred from the claim text.