Internal-combustion engines – Poppet valve operating mechanism – Tappet
Patent
1990-10-31
1991-06-11
Okonsky, David A.
Internal-combustion engines
Poppet valve operating mechanism
Tappet
123 9058, F01L 124
Patent
active
050223615
ABSTRACT:
The valve-lash adjustment system 10 includes a load-carrying spacer means 82 adjacent the hydraulic valve-lash assembly which is interposed between said hydraulic valve-lash assembly and said free end 12 of the valve stem, the thickness of said load-carrying spacer means 82 being such as to compensate substantially for said mechanical tolerances between said valve and said associated engine components, so that, during engine operation, said hydraulic valve-lash adjuster assembly adjusts the overall length thereof within a limited range of distances required to compensate for said thermal expansion/contraction between the valve and said associated engine components, and, in the event of a failure in supply of hydraulic fluid to said hydraulic valve-lash adjuster assembly, said hydraulic valve-lash adjuster assembly will only decrease in overall length by an amount falling within said limited range of distances.
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General Motors Corporation
Lo Weilun
Okonsky David A.
Outland Robert J.
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