Timing system, particularly for an internal combustion engine wi

Details Timing system, particularly for an internal combustion engine wi Timing system, particularly for an internal combustion engine wi

1991-06-17

1992-03-17

Cross, E. Rollins

Internal-combustion engines

Poppet valve operating mechanism

Overhead camshaft

123308, F01L 104

Patent

active

050958585

ABSTRACT:
A timing system for controlling, by means of a single overhead camshaft, three adjacent, homologous valves of an internal combustion engine cylinder; each valve having a tappet located between the valve stem and a respective control cam on the camshaft. The valve stems are arranged with their axes shifted laterally, and alternately on opposite sides, in relation to a plane including the axes of the tappets, so as to define a first eccentricity between each valve stem and respective tappet in a plane perpendicular to the camshaft axis. The intermediate valve item is aligned with the axis of the respective tappet in the first plane. In a plane perpendicular to the above plane the other two valve stems are both shifted laterally towards the intermediate valve stem, so as to define, with the respective tappets, a second eccentricity perpendicular to the first. The tappets may thus be arranged side by side and aligned centrally along the camshaft axis.

REFERENCES:
patent: 4660529 (1987-04-01), Yoshikawa
patent: 4697554 (1987-10-01), Bothwell
patent: 4911113 (1990-03-01), Yamada
patent: 4979474 (1990-12-01), Morishita
patent: 5018497 (1991-05-01), Tsuchida

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