Valve operating mechanism for internal combustion engine
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorsKenichi Nagahiro, Yoshio Ajiki, Masaaki Katoh, Kazuo Inoue
Life of this patent
Estimating the term…
Abstract
A valve operating mechanism includes a camshaft rotatable in synchronism with rotation of an internal combustion engine and having a plurality of cams of different cam profiles. First, second, and third rocker arms are held in sliding contact with the cams, respectively, for operating the valves according to the cam profiles of the cams. The rocker arms are selectively interconnected and disconnected by first and second selective couplings to operate the valves at different valve timings in low, medium, and high speed ranges of the internal combustion engine.
Claims18
A valve operating mechanism for operating a pair of valves of an internal combustion engine, comprising:
- a camshaft rotatable in synchronism with rotation of the internal combustion engine and having a plurality of cams of different cam profiles;
- a plurality of rocker arms held in sliding contact with said cams, respectively, for operating the valves according to the cam profiles of said cams;
- and
- means for independently selectively interconnecting and disconnecting selected of said rocker arms to operate the valves at different valve timings in low, medium and high speed ranges of the internal combustion engine.
A valve operating mechanism for operating valve means of an internal combustion engine, comprising:
- a camshaft rotatable in synchronism with rotation of said engine;
- a plurality of driver rocker arms operably connecting said valve means to open and close said valve means in accordance with a desired mode of operation, and a free rocker arm adjacent each of said driver rocker arms;
- a plurality of cams on said camshaft, each engaging one of said rocker arms and each having a cam profile effective to impart a desired mode of operation to said valve means;
- means for selectively interconnecting and disconnecting said rocker arms including couplings operative between adjacent pairs of rocker arms;
- and
- means for independently actuating each said coupling.
Dependencies are inferred from the claim text.