INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To implement high scavenging effect and pulsation supercharging effect to increase torque with pulsation supercharging effect. SOLUTION: An internal combustion engine comprises: an intake passage 5 having a opening part opened to a combustion chamber of an internal combustion engine; an intake valve 7 opening/closing the opening part; an intake control valve 12 disposed upstream of the intake valve 5 of the intake passage 5 to open/close a passage cross-sectional surface of the intake passage 5; and a control means 13 for opening/closing the intake control valve 12 depending on a speed of the internal combustion engine during the period wherein the intake valve 5 is opened. The intake control valve 12 is closed before the closure of the intake valve 7 to hold air between the intake control valve 12 and intake valve 7. The supercharging is performed by using the pulsation generated when the air held therebetween is released by opening the intake valve 7. Energy is built up in gas held between the intake control valve 12 and the intake valve 7 as pressure to be used for scavenging gas from the combustion chamber 4. The capacity between the intake control valve 12 and the intake valve 7 is set to maximize the scavenging energy. COPYRIGHT: (C)2006,JPO&NCIPI