FUEL-AIR MIXTURE-FORMING APPARATUS FOR INTERNAL-COMBUSTION ENGINE

摘要

PURPOSE: To supply fuel uniformly by forming a fuel supply part so that it extends radially, in a device in which the fuel and air supply parts are provided around a nozzle formed by a rotation-symmetrical nozzle body and a rotation- symmetrical throttle body. CONSTITUTION: In a nozzle body 2 having an approximately rotation-symmetrical interior wall 3 which gets narrower downward from an upper range 4 to the narrowest inner cross-sectional part 5, an inverted-teardrop-shaped throttle body 7 which is similarly in rotation symmetry with respect to the vertical axis 1 of the nozzle body 2 is provided in such a way as to be freely axially movable for adjustments. The nozzle body 2 is divided into upper and lower portions within the range of the narrowest cross section 8 and an annular disc 9 provided with a plurality of radially extending slits 11 is interposed between the upper and lower nozzle body portions 2a, 2b. The slits 11 are made to work as fuel supply passages communicated to a fuel inlet hole 15 via an annular fuel passage 16, and after air supplied into a fuel-air gap 17 from a hole 20 is mixed with the fuel, this mixture is ejected from a gap opening 18.