Internal-combustion engines – Poppet valve operating mechanism – Tappet
Patent
1989-04-28
1990-10-30
Myhre, Charles J.
Internal-combustion engines
Poppet valve operating mechanism
Tappet
74569, 123 9061, 123508, 3849071, 403 76, 403122, F01L 114, F16C 1100
Patent
active
049661086
ABSTRACT:
A ceramic-metallic interfacing joint assembly is disclosed. The joint assembly includes a pair of interfaced components in a highly loaded, sliding contact in which the contact stresses can be as high as 250,000 psi. Preferably, the pair of interfaced components includes a ball member and a complementarily shaped, mating socket member and is used in a diesel type internal combustion engine. One of the components is formed of a ceramic material having a density of at least 3.18 g/cm.sup.3 and the other component is formed of a metallic material. Preferably, the density of the ceramic material ranges from 3.18 g/cm.sup.3 to 3.25 g/cm.sup.3. This arrangement reduces the wear of the joint assembly in conjunction with the use of a lubricant which lubricates the components. Specifically, the metallic material is an iron based material while the ceramic material is a sintered silicon nitride. The ceramic material may be sintered with rare-earth metal oxides such as yttrium oxide. Alternately, the ceramic material may be sintered using aluminum oxides.
REFERENCES:
patent: 4184213 (1980-01-01), Heimke
patent: 4325647 (1982-04-01), Maier et al.
patent: 4366785 (1983-01-01), Goloff et al.
patent: 4419977 (1983-12-01), Hillebrand
patent: 4453505 (1984-06-01), Holtzberg et al.
patent: 4508067 (1985-04-01), Fuhrmann
patent: 4614453 (1986-09-01), Tsuno et al.
patent: 4615990 (1986-10-01), Richon et al.
patent: 4629707 (1986-12-01), Wolfe
patent: 4643144 (1987-02-01), Fingerle et al.
patent: 4719187 (1988-01-01), Bardhan et al.
patent: 4794894 (1989-01-01), Gill
patent: 4806040 (1989-02-01), Gill et al.
patent: 4848286 (1989-07-01), Bentz
Bentz Joseph C.
Fujimoto Yuji
Patten James W.
Yonushonis Thomas M.
Cummins Engine Company, Inc.
Lo Weilun
Myhre Charles J.
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