Patent ID: 8342430
Filing Date: 2013-01-01
Classification: F02M

Abstract:
1. A fuel injection valve comprising: a valve body; a valve seat member which slidably accommodates therein the valve body and has a swirl chamber which is formed into a circular hollow shape at a downstream side of the opening portion of the valve seat member and has a cylindrical inner side surface, the swirl chamber providing swirl to fuel; an orifice nozzle which is formed into a cylindrical shape at a bottom of the swirl chamber, and from which the fuel is jetted; a communication conduit through which the swirl chamber communicates with the opening portion of the valve seat member, the communication conduit extending toward a tangential direction of the swirl chamber and connecting with the swirl chamber; and a fuel inflow prevention wall which is provided at a connecting area between the communication conduit and the swirl chamber, and when setting a first connecting point, a second connecting point, a first straight line, a second straight line and a third straight line, viewed from an axial direction of the swirl chamber, in the swirl chamber, as follows; the orifice nozzle being positioned at a center side with respect to the second straight line in the swirl chamber, and the fuel inflow prevention wall being set at a first connecting point side with respect to the third straight line with the fuel inflow prevention wall extending from the first straight line to the second straight line.