Patent ID: 9121379
Filing Date: 2015-09-01
Classification: F02M

Abstract:
1. A fuel injection valve comprising: a valve body slidably installed within the injection valve; a valve seat member having a valve seat on which the valve body is seated at a time of a valve closure and having an opening section at a downstream side of the valve seat member; a plurality of swirl generating chambers, each swirl generating chamber being configured to swirl fuel at an inner part of a corresponding one of the swirl generating chambers to provide a swirling force for fuel; a plurality of injection holes, each injection hole being formed on a bottom section of the corresponding one of the swirl generating chambers and penetrated to an external; and a communication passage configured to communicate between the corresponding one of the swirl generating chambers and the opening section of the valve seat member, wherein a pipe line through which fuel is uniformly caused to flow is supposed from a flow quantity of fuel flowing into each of the communication passages and, if a diameter of the pipe line is assumed to be da and a diameter of each of the injection holes is assumed to be d wherein  wherein W denotes a width of each of the communication passages and H denotes a height of each of the communication passages.