Patent ID: 6769638
Filing Date: 2004-08-03
Classification: F02M,Y10S

Abstract:
A fuel injection valve comprising:an orifice plate having injection orifices formed therein; a valve seat having a valve seating situated in the upstream section of said injection orifices; a fuel flow path in a cylindrical form formed within said valve seat; a fuel cavity formed in the space between said fuel flow path and said orifice plate having said injection orifices and situated directly above said injection orifices; and a valve member supported by said valve seat in a way enabling reciprocation and having an abutting section that can be settled in the valve seating formed in said valve seat wherein the abutting section is settled in and lifted off said valve seat, and producing a plurality of spray flows consisting of a plurality of fuel flows injected out of said injection orifices formed in said orifice plate; wherein said injection orifices are disposed only along diameter &PHgr;P of a single pitch circle with its center coinciding with the axis of said fuel flow path, and the diameter of said fuel flow path (&PHgr;D1), the diameter of each of said injection orifices (&PHgr;d), &PHgr;P and the depth in the axial direction of said fuel cavity (t) are made to have the relationships &PHgr;D1+&PHgr;dwherein a group of the injection orifices forming a single spray flow are disposed at an equal pitch along a circumference of the single pitch circle.