Patent ID: 9157403
Filing Date: 2015-10-13
Classification: F02M

Abstract:
1. A fuel injection valve comprising: a movable valve element; a valve seat member having a valve seat on which the valve element is seated to establish a valve closing condition, the valve seat member being formed with an opening located at a downstream side of the valve seat member; a first section defining a swirl imparting chamber for imparting a swirl force to fuel within the swirl imparting chamber by turning fuel; a second section defining an injection hole opened to a bottom of the swirl imparting chamber to inject fuel to outside; and a third section defining a communication passage connecting the swirl imparting chamber with the opening of the valve seat member, wherein the swirl imparting chamber and the communication passage are formed to satisfy the following equations: wherein W is a width of the communication passage, D is a diameter of the swirl imparting chamber, and H is a height of the communication passage.