Fuel injection system for vehicle engine; has fuel mixer with several grooves and valve seat that engages surface of fuel mixer to form annular fuel mixing chamber with valve body

摘要

The system has a fuel mixer (8) with several grooves and a valve seat (9), which engages the surface of the fuel mixer to form an annular fuel mixing chamber. A valve body (7) co-operating with the valve seat moves in a cylindrical hole in the fuel mixer to open or close a connection passage between the fuel mixing chamber and the fuel injection opening (91). The minimum cross-section area of a space between the valve body and the valve seat when the connection passage is completely open is smaller than the area of the cross-section of the fuel injection opening perpendicular to its axis and is larger than the cross-sectional area of the fuel injection opening perpendicular to the direction of a fuel flow