Integral rocker arm hydraulic lifter and bearing assembly

Details Integral rocker arm hydraulic lifter and bearing assembly Integral rocker arm hydraulic lifter and bearing assembly

F - Mech Eng,Light,Heat,Weapons

01

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123/190, 308/35

F01L 1/20 (2006.01) F01L 1/18 (2006.01) F01L 1/24 (2006.01)

Patent

CA 1233714

INTEGRAL ROCKER ARM HYDRAULIC LIFTER AND BEARING ASSEMBLY Abstract of the Disclosure A rocker arm assembly for use in the valve train of an internal combustion engine of the type having a fixed rocker shaft for supporting at least one rocker arm and having an axial passage adapted to be in continuous communication with the pressurized lubricant supply of the engine and with at least one radial riser passage extending from the axial passage; the rocker arm assembly including a rocker arm having a hydraulic lash adjuster operatively positioned in a socket provided in an arm thereof and, a hybrid bearing operatively positioned in the rocker arm so as to encircle the rocker shaft over the oil riser passage. The hybrid bearing includes an outer race having an inner cylinder race surface and a radial aperture in fluid communication with passage means extending to the lash adjuster, a plurality of needles operatively positioned on the race surface in rolling contact with a portion of the rocker shaft opposite the riser passage therein and, a semi-cylindrical sleeve bearing fixed to the outer race in operative engagement with the outer race between opposite end ones of the needles whereby to encircle the remaining portion of the rocker shaft, the sleeve bearing having a radial extending port means effecting flow communication between the riser passage in the rocker shaft and the aperture in the outer race whereby lubricant can be supplied to the hydraulic lash adjuster.

464402

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