SIZE OF VALVE OPENED AT BOTTOM DEAD CENTER AND CLOSED SHORT OF TOP DEAD CENTER DURING COMPRESSION STROKE WITH RESPECT TO INTAKE VALVE FOR AIR-FUEL MIXTURE

摘要

PROBLEM TO BE SOLVED: To provide an engine emphasizing combustion efficiency in low revolution speed and emphasizing power in high revolution speed, by making a real air-fuel mixture amount in cylinders in high revolution speed larger than that in low revolution speed. SOLUTION: In a four-cycle engine or a six-cycle engine using a valve a, a valve c, a valve d, and a valve b, the size of a valve opened at the bottom dead center and closed short of the top dead center during compression stroke is smaller than the size of an intake valve for air-fuel mixture. The size of the valve b is made smaller than that of the valve a (with regard to the valve a, valve c, valve d, and valve b, refer to Explanation of Marks in Specification). COPYRIGHT: (C)2005,JPO&NCIPI