METHOD FOR TAKING ACTUAL EXPANDING STROKE DURING EXPANSION STROKE LONGER IN TERMS OF STROKE THAN IN ACTUAL COMPRESSING STROKE DURING COMPRESSION STROKE AND COUNTERMEASURE AGAINST TOOL LONG STROKE, AND DIRECT INJECTION 4-CYCLE GASOLINE ENGINE PERFORMING OPENING/CLOSING AT LOW/HIGH ENGINE SPEED OR AT LOW/HIGH LOAD, AND OPENING/CLOSING OF PASSAGE FROM VALVE IN RELATION TO SIZE AND NUMBER OF VALVES

摘要

PROBLEM TO BE SOLVED: To obtain a method for changing an actual air (atmospheric air) quantity in a cylinder at low/high explosion rotation speed of an engine a, or at low/high load relative to resistance to the rotation during compression stroke of the engine a.;SOLUTION: The size of a valve d is set smaller than that of a valve b. The valves d, e are opened/closed depending on whether the rotation speed is low or high, or the resistance is low or high. A passage (pipe) from the valve d to a valve e is opened/closed, and a lifting amount of the valves d, e is decreased/increased. When the number of the valve b is set at 2 and the number of the valve d is set at 1, ratio can be varied as in 1:1 or 2:1. Furthermore, one of two intake pipes is opened/closed.;COPYRIGHT: (C)2005,JPO&NCIPI