Four-stroke cycle internal combustion engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 8, 2000
Grant Date -
N/A
app pub date -
Sep 22, 1998
filing date -
Sep 25, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A four-stroke cycle internal combustion engine allowing simplified assembly, high productivity, and still high precision in assembly is made up of a crankshaft; a camshaft; a gear train for transmitting the rotation of the crankshaft to the camshaft; and a housing block. The housing block includes a cylinder portion with the gear train disposed in a longitudinal direction along the cylinder portion. The housing block further includes a bearing portion for supporting the crankshaft, an upper outer wall portion extending vertically downward from the cylinder portion to the bearing portion and a longitudinally oriented gear case for housing the gear train. The housing block is divided into a cylinder block main body part and a cylinder block lower part at the bearing portion of the crankshaft. The cylinder block body portion includes an integrally formed cylinder portion, upper outer wall portion and gear case.
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