Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Reexamination Certificate
2006-06-06
2006-06-06
Denion, Thomas (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
C123S1960CP, C123S19800E
Reexamination Certificate
active
07055471
ABSTRACT:
An apparatus and method for providing lubricant to a plurality of hydraulic lifters in an internal combustion engine is disclosed, in which the amount of gas bubbles present in the lubricant provided to the lifters is reduced or eliminated so that lifter noise is reduced or prevented. The apparatus, which is part of an internal combustion engine that includes valve trains with hydraulic lifters that are positioned proximate the crankcase and one another, includes a lifter feed gallery that receives lubricant from a feed passage, and communicates the lubricant to lifter feed holes. The lifter feed holes in turn communicate the lubricant to the respective hydraulic lifters. At or near the top of the lifter feed gallery proximate where the feed passage is coupled to the gallery is a single bleed orifice, which diverts gas bubbles away from the gallery and into the crankcase.
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Chang Ching
Denion Thomas
Kohler Co.
Quarles & Brady LLP
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