Variable valve duration and lift for an internal combustion engi

Details Variable valve duration and lift for an internal combustion engi Variable valve duration and lift for an internal combustion engi

1990-08-28

1991-10-15

Wolfe, Willis R.

Internal-combustion engines

Poppet valve operating mechanism

With means for varying timing

123 9015, F01L 134

Patent

active

050564765

ABSTRACT:
A mechanism to vary the duration and lift of a valve in an internal combustion engine, wherein a lever engaging a camlobe is rotated about a fulcrum by rotation of the camlobe; the lever possessing a member to actuate a valve; the member to engage a valve being articulated with respect to the lever, and the fulcrum possessing means to displace the valve actuating member when the lever is rotated; the displacement of the valve actuating member actuating a valve. Rotation of the fulcrum of the lever alters the point in lever rotation at which the valve actuating member is displaced to actuate the valve, and determines the extent of that displacement, so that the duration and lift of the vlave may be varied relative to duration and lift of the camlobe.

REFERENCES:
patent: 2851851 (1958-09-01), Smith
patent: 2934052 (1960-04-01), Longenecker
patent: 3112739 (1963-12-01), Peras
patent: 4502426 (1985-03-01), Skelley
patent: 4836155 (1989-06-01), Slagley et al.
patent: 4901684 (1990-02-01), Wride

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