Internal-combustion engines – Poppet valve operating mechanism – Camshaft drive means
Patent
1998-09-22
2000-08-08
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Camshaft drive means
123 9027, 1231933, F01B 2306, F01L 106
Patent
active
060985828
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.
REFERENCES:
patent: 4836156 (1989-06-01), Inagaki et al.
patent: 5579735 (1996-12-01), Todero et al.
patent: 5606943 (1997-03-01), Tamba et al.
patent: 5606944 (1997-03-01), Kurihara
patent: 5704315 (1998-01-01), Tsuchida et al.
patent: 5706769 (1998-01-01), Shimizu
Kioritz & Corporation
Lo Weilun
LandOfFree
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