Fuel injection valve and fuel injection system
AssigneeHitachi, Ltd.
InventorsYoshio Okamoto, Yuzo Kadomukai, Motoyuki Abe, Ayumu Miyajima, Masami Nagano
Life of this patent
Estimating the term…
Abstract
In an internal combustion engine, an amount of spray attaching onto an inner wall surface of an intake pipe is reduced by forming a two-directional spray of highly atomized fuel. The highly atomized two-directional spray can be obtained by a spray forming means constructed by piling a fuel in-plate forming fuel passages, a swirl plate forming fuel passages for adding swirl forces to the fuel, and an injection plate for determining injection directions of the fuel. Further, penetrations of the sprays injected toward two directions are made different from each other.
Claims15
A fuel injection system comprising an intake pipe for supplying air to an internal combustion engine;
- an intake air flow control device for controlling an air flow flowing inside said intake pipe;
- and a fuel injection valve for injecting fuel, said fuel injection valve being arranged at a position downstream of said intake air flow control device inside said intake pipe, wherein
- said fuel injection valve is a fuel injection valve for injecting fuel in two directions, and said fuel injection valve has a means for making penetration different between fuel sprays injected in individual directions.
A fuel injection valve comprising:
- a valve seat and a valve disc arranged detachably from and attachably to said valve seat;
- at least first and second fuel injection holes to permit fuel to be injected respectively as two separate sprays in two different directions from said first and second fuel injection holes, said fuel injection holes being arranged in a downstream side of said valve seat;
- and
- means for making penetration of a fuel spray from the first fuel injection hole different than the penetration of a fuel spray from the second fuel injection hole.
A fuel injection valve comprising:
- a valve seat and a valve disc arranged detachably from and attachably to said valve seat;
- two fuel injection holes arranged in a downstream side of said valve seat;
- and
- swirl force adding means for adding a swirl force to fuel, said swirl force adding means being arranged in an upstream side of said fuel injection holes and in a downstream side of said valve seat corresponding to each of said fuel injection holes so that fuel may be sprayed through said two fuel injection holes toward two directions;
- a first plate member having two fuel injection holes, said two fuel injection holes penetrating through said first plate member from an upstream side end surface to a downstream side end surface so as to be directed in directions different from each other, said two fuel injection holes being independently juxtaposed in a surface direction of the upstream side end surface and the downstream side end surface;
- a second plate member having said two swirl force adding means, said two swirl force adding means being formed of two through holes penetrating through said second plate member from an upstream side end surface to a downstream side end surface and independently juxtaposed in a surface direction of the upstream side end surface and the downstream side end surface;
- and fuel passages provided in said individual through holes, said fuel passage being directed toward a direction offset with respect to a center of said fuel passage to communicate with said fuel passage;
- and
- a third plate member having passage wall surfaces forming fuel passages communicating from an upstream side end surface to a downstream side end surface of said third plate member, wherein
- said first plate member and said second plate member and said third plate member are piled up in a downstream side of said valve seat in order of said first plate member, said second plate member and said third plate member from the downstream side so that said fuel passages of said third plate member communicate with said fuel passages of said second plate member, and said two through holes of said second plate member individually communicate with said two fuel injection holes of said first plate member.
Dependencies are inferred from the claim text.