Patent ID: 6092741
Filing Date: 2000-07-25
Classification: F02M

Abstract:
A fuel injection valve, comprising:an injection valve main body having an injection port which injects fuel;an adapter, molded from resin and mounted to an extreme end of said injection valve main body;a plurality of air/fuel mixing passages formed in said adapter at equal pitches about a first center line drawn axially through said fuel injection valve, having passage centers defined from cross-sectional areas of said air/fuel mixing passages which provide second center lines through each of the passage centers; said second center lines intersecting at one point on the first center line, said intersection point being positioned on an upstream side of said adapter, each of said passages being disposed at a same angle of inclination with respect to the first center line, said air/fuel mixing passages causing the fuel from the injection port to pass therethrough;air passages, formed in said adapter which communicate with said air/fuel mixing passages to introduce air into said air/fuel mixing passages;a plate, disposed between said injection valve main body and said adapter; andorifice holes, formed in said plate to confront openings of said plurality of air/fuel mixing passages in order to distribute the fuel from the injection port to said plurality of air/fuel mixing passages,wherein said plurality of air/fuel mixing passages are formed having virtual edge portions at the openings thereof which contact each other, without overlapping, at the upstream end surface of said adapter and wherein a cross section of each of said air/fuel mixing passages is linearly shaped and approximately parallel with a tangential line of an adjacent virtual edge portion forming a partition wall having a prescribed thickness between adjacent air/fuel mixing passages.