Structure of camshaft bearing

Details Structure of camshaft bearing Structure of camshaft bearing

1987-04-24

1988-10-18

Smith, Gary L.

Machine element or mechanism

Elements

Cams

123 9027, 123 9034, F16H 5302

Patent

active

047778423

ABSTRACT:
An oil groove capable of holding oil is formed on the inside surface of a camshaft bearing consisting of a cylinder head and a cam cap, at a position where the valve spring force acts. Oil is supplied to the oil groove from a cavity in a camshaft via an orifice provided in the camshaft. Since the part of the camshaft bearing which is exposed to the severest frictional contact is preferentially lubricated and at the same time the camshaft bearing as a whole can be well lubricated, even when the oil supply pressure from oil pump is insufficient on account of low engine speed or even when the viscosity of oil is low due to high temperature and thereby the oil film at the camshaft bearing is very thin, the camshaft bearing can be maintained in a well-lubricated state by the oil held in the oil groove, and thereby the binding can be prevented.

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