Valve spring retainer for valve operating mechanism for internal

Details Valve spring retainer for valve operating mechanism for internal Valve spring retainer for valve operating mechanism for internal

1989-09-28

1991-02-05

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Spring

123 9051, F01L 310

Patent

active

049895567

ABSTRACT:
A valve spring retainer for a valve operating mechanism for an internal combustion engine comprises a matrix formed from a quenched and solidified aluminum alloy powder, and a hard grain dispersed in said matrix. The hard grain is at least one selected from the group consisting of grains of Al.sub.2 O.sub.3, SiC, Si.sub.3 N.sub.4, ZrO.sub.2, SiO.sub.2, TiO.sub.2, Al.sub.2 O.sub.3 -SiO.sub.2 and metal Si. The amount of hard grain added is in a range of 0.5% to 20% by weight, and the area rate of said hard grain is in a range of from 1% to 6%.

REFERENCES:
patent: 4230491 (1980-10-01), Behnke
patent: 4432311 (1984-02-01), Holtzberg et al.
patent: 4483286 (1984-11-01), Hermann et al.
patent: 4665869 (1987-05-01), Hinz et al.
patent: 4834941 (1989-05-01), Shiina
patent: 4856469 (1989-08-01), Okazaki et al.
patent: 4873150 (1989-10-01), Doi et al.

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