Patent ID: 7784716
Filing Date: 2010-08-31
Classification: F02M

Abstract:
1. A fuel injection valve comprising: a hollow valve main body, a valve seat provided at one end of said valve main body and having an injection hole, a valve body slidably supported so as to be separated from and brought into contact with said valve seat to open and close said injection hole, and a swirler for surrounding said valve body to slidably support said valve body and for imparting a swirling motion to fuel flowing into said injection hole; wherein a swirling groove in said swirler is provided with a curvature part in a groove outlet, such that a distal end of said groove outlet, in a top view thereof, is curved, and a cross-sectional configuration of said swirling groove is constituted so that a bottom surface of said swirling groove is flat and entire side surfaces of said swirling groove are arc-shaped, wherein an upper surface of said swirling groove is open-ended, wherein a portion of said groove outlet, other than said distal end, is also curved in a top view thereof, and wherein a length of an arc part between said swirling groove and an adjacent swirling groove is set below a fifth of a groove width.