Reduced friction engine tappet construction

Details Reduced friction engine tappet construction Reduced friction engine tappet construction

1988-12-27

1989-09-19

Myhre, Charles J.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9055, F01L 116, F01L 124

Patent

active

048671134

ABSTRACT:
An engine tappet is constructed with flat, essentially parallel or conformal bearing surfaces internal of its case for the introduction during no-load operation of a lubricant under pressure to the space between the surfaces, the pressure level of the lubricant being greater than the force necessary to remove lash in the system, to thereby create an oil film between the surfaces that is partially squeezed out during load operations of the cam event to in effect float one part upon the other to reduce rotational friction.

REFERENCES:
patent: 2925808 (1960-02-01), Baumann
patent: 3406668 (1968-10-01), Donnelly et al.
patent: 3598095 (1971-08-01), Ayres
patent: 3875911 (1975-04-01), Joseph
patent: 3967602 (1976-07-01), Brown
patent: 4227495 (1980-10-01), Krieg
patent: 4498432 (1985-02-01), Hara et al.
patent: 4561393 (1985-12-01), Kopel
patent: 4589383 (1986-05-01), Showalter
patent: 4798180 (1989-01-01), Okabe et al.

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