VALVE SYSTEM CONTROLLER FOR INTERNAL COMBUSTION ENGINE

摘要

PURPOSE:To improve acceleration performance by switching the valve from a low-speed acting condition to a high-speed acting condition by selecting the number of revolutions larger than that whereby output torque is same for either low-speed or high-speed acting condition. CONSTITUTION:A pair of a cam 4 for low speed and a cam 5 for high speed is installed integrally with a cam shaft 2. The connection and disconnection of rocker arms 7-9 pivoted to a rocker shaft 6 are performed by a valve action changing mechanism 10. Switching from a low-speed acting condition to a high-speed acting condition is performed by selecting the number of revolutions larger than that whereby output torque is same for either low-speed or high-speed acting condition. Switching is performed by selecting the number of revolutions resulting in a larger torque, and thus the acceleration performance can be improved.