Internal-combustion engines – Poppet valve operating mechanism – Lubrication
Patent
1994-10-05
1996-06-11
Lo, Weilun
Internal-combustion engines
Poppet valve operating mechanism
Lubrication
123196R, 123196M, 123196W, F01M 910, F01M 106
Patent
active
055245811
ABSTRACT:
An internal combustion engine comprising a cylinder block which defines a cylinder, a crankshaft bearing supported at least in part by the cylinder block, a crankshaft which is rotatably supported by the crankshaft bearing, a piston slidably housed in the cylinder, a connecting rod having one end connected to the piston and having an opposite end connected to the crankshaft, a cylinder head mounted on the cylinder block, a camshaft at least partially supported by the cylinder head for rotation relative thereto, an oil pump having an outlet, a first oil conduit communicating between the oil pump outlet and the crankshaft bearing, an oil filter communicating with the first oil conduit for filtering oil only in the first oil conduit, and a second oil conduit communicating between the oil pump outlet and the camshaft, oil in the second oil conduit being unfiltered between the pump outlet and the camshaft.
REFERENCES:
patent: 4452194 (1984-06-01), Watanabe
patent: 4611559 (1986-09-01), Sumigawa
patent: 5090375 (1992-02-01), Hudson
patent: 5163394 (1992-11-01), Koishikawa et al.
Irwin Gregory D.
Kantola James C.
Noble Mark C.
Rush, II William B.
Wagner Jeffrey F.
Lo Weilun
Outboard Marine Corporation
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