INTERNAL COMBUSTION ENGINE

摘要

PROBLEM TO BE SOLVED: To prevent deposit of a fuel component on a wall of a passage, where fuel gas containing the fuel component flows. SOLUTION: Deposit of a fuel component on a wall surface 101 of a passage is prevented by forming recesses 102 and protrusions on parts having a tendency of depositing fuel component on the wall surface 101 of a passage 100 where fuel component containing gas flows, and forming turbulence in the flow of the fuel component containing gas along the wall surface 102 of the passage. With this constitution, after the soot deposited on the wall has become large, the soot is separated from the wall surface and is exhausted from an internal combustion engine.