VARIABLE VALVE SYSTEM FOR INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a variable valve system that allows easy adjustment on the operating timing and lift of its intake or exhaust valve. SOLUTION: A camshaft 1 has a rocker cam 5 for driving an intake or exhaust valve. A drive cam 4 on the periphery of the camshaft 1 carries a link arm 6 which is turntable thereabout. A control cam 10 on the periphery of a control shaft 9 carries a rocker arm 11 rocking therearound. One end of the rocker arm 11 is connected to the link arm 6, and the other is connected to the rocker cam 5 via a link rod 12. The rocker arm 11 and link rod 12 are interconnected by a connecting pin 16, and the link rod 12 and rocker cam 5 are interconnected by another connecting pin 17. Accordingly, with both connecting pins 16 and 17 removed, replacing the link rod 12 with another enables adjustment of the operating timing and lift of the intake or exhaust valve.