Engine valve

Details Engine valve Engine valve

1992-08-31

1993-03-02

Cross, E. Rollins

Internal-combustion engines

Valve

Reciprocating valve

1231886, 12318811, 298884, F01L 300

Patent

active

051900025

ABSTRACT:
The novel valve of this invention is for use in internal combustion engines. With advanced engine technology of today, prior art valves are not suitable because of wear problems. The valve of this invention provides a valve stem texture that is smooth enough to cause minimal wear on contacting parts while at the same time rough enough to retain sufficient oil to lubricate the parts. This is accomplished by having a stem surface with a surface peak height of Rp 4.0 to 15.0 and cross hatching on the affected surface portions. The cross hatching has a depth having an Rvk value of up to 30 micro-inches.

REFERENCES:
patent: 1949592 (1934-03-01), Verderber
patent: 3461001 (1969-08-01), Kubera
patent: 4359022 (1982-11-01), Nakamura et al.
patent: 4728374 (1988-03-01), Larson et al.
patent: 5076866 (1991-12-01), Koike et al.

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