INTERNAL COMBUSTION ENGINE, VEHICLE, MARINE SHIP AND METHOD FOR CLEANING THE EXHAUST GAS OF THE INTERNAL COMBUSTION ENGINE

摘要

1. An internal combustion engine comprising:! a combustion chamber having an outlet; ! an exhaust valve for opening or closing the outlet; ! an exhaust device having an outlet for directing exhaust gas discharged from the combustion chamber through the outlet; ! an exhaust gas purification device located in an exhaust channel and having a catalyst; ! while the exhaust device contains:! tapering section having a cross-sectional area for flow, smaller at its output end than at its input end; ! an expanding section located downstream of the tapering section and having a cross-sectional area for flow greater at its output end than at its input end; and! a branch section for branching a shock wave propagating in the flow direction in the exhaust channel at a higher rate than the exhaust gas passing into the exhaust channel from the combustion chamber when the exhaust opening is open, from a portion of the exhaust channel that is closer to the flow relative to the expanding section, and spreading the shock wave back into the outlet; ! the exhaust gas passing into the exhaust channel from the combustion chamber passes through the tapering section and encounters a shock wave, which propagates in the branch section, between the branch section and the expanding section, thereby increasing the pressure of the exhaust gas in the tapering section; ! the exhaust gas passes through an expanding section to create a new shock wave and thus reduce the exhaust temperature