Internal-combustion engines – Poppet valve operating mechanism – Tappet
Patent
1989-04-03
1989-12-19
Wolfe, Willis R.
Internal-combustion engines
Poppet valve operating mechanism
Tappet
123 9035, 123 9055, F01L 124
Patent
active
048875660
ABSTRACT:
The present invention relates to a hydraulic valve lash adjuster which is capable of storing a large quantity of oil therein and exhibits high resistance to wear. In the valve lash adjuster in accordance with the invention, the plunger comprises an upper plunger portion and a lower plunger portion, at least a portion of a partition member extends over the joint between the upper and lower plunger portions, and the upper plunger portion being welded to the lower plunger portion by projection welding so that the partition member is deformed inward by bulging of the welded portion to fix the partition member within the plunger. Accordingly, the upper and lower plunger portions are welded together by projection welding, and simultaneously the partition member is sealingly fixed within the plunger. The plunger thus formed is surface hardened by quenching or carburizing. With the above construction of the invention, therefore, the hardness of the outer surface of the plunger is not impaired and the residual stresses generated by welding do not degrade the resistance to wear and fatigue.
REFERENCES:
patent: 2688319 (1954-09-01), Humphreys
patent: 2938508 (1960-05-01), Papenguth
patent: 3838669 (1974-10-01), Dadd
patent: 4004558 (1977-01-01), Scheibe
patent: 4437439 (1984-03-01), Speil
patent: 4584976 (1986-04-01), Hillebrand
patent: 4607599 (1986-08-01), Buente et al.
patent: 4747376 (1988-05-01), Speil et al.
patent: 4771741 (1988-09-01), Leer
Fuji Valve Co., Ltd.
Lo Weilun
Wolfe Willis R.
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