阅读说明：本技术 燃料喷射阀 (Fuel injection valve ) 是由 永滝文宏 于 2017-11-17 设计创作，主要内容包括：燃料喷射阀包括阀座面、形成有喷孔的喷孔面以及连接所述阀座面和所述喷孔面的连接面,可动阀相对于该阀座面抵接、分离,在所述连接面形成有朝向所述喷孔延伸的槽。(Fuel injection valve includes the joint face of valve seat, the spray orifice face for being formed with spray orifice and the connection valve seat and the spray orifice face, and movable valve is abutted relative to the valve seat, separated, and the slot extended towards the spray orifice is formed in the joint face.)

1. a kind of fuel injection valve, wherein

The fuel injection valve includes:

Valve seat, movable valve are abutted relative to the valve seat, are separated；

Spray orifice face, is formed with spray orifice；And

Joint face connects the valve seat and the spray orifice face,

The slot extended towards the spray orifice is formed in the joint face.

2. fuel injection valve according to claim 1, wherein

Multiple spray orifices are formed in the spray orifice face,

Multiple slots are formed in the joint face,

The spray orifice is located on the extended line of the center line extended along the length direction of each slot.

3. fuel injection valve according to claim 2, wherein

Each slot extends to the position abutted with the spray orifice.

4. fuel injection valve according to claim 2 or 3, wherein

Radially distributing from the center in the spray orifice face has the combination of the spray orifice and the slot.

5. fuel injection valve according to any one of claims 1 to 4, wherein

The side that the spray orifice is separated from upstream towards downstream to the center from the spray orifice face tilts.

6. fuel injection valve according to any one of claims 1 to 5, wherein

In the upstream side of the valve seat there are cylindrical side,

The lead-in groove of the upstream end thereof towards the slot is formed in the cylindrical side.

Technical field

In the present specification, a kind of fuel injection valve that micronized ability that spraying fuel is excellent is disclosed.

Background technique

There is known a kind of fuel injection valve including valve seat He the spray orifice face for being formed with spray orifice, movable valve is relative to the valve Seat surface is abutted, is separated.In this fuel injection valve, the fuel after passing through between isolated movable valve and valve seat reaches spray Hole face, the fuel crossed along spray orifice surface current sharp change flow direction and pass through spray orifice.At this point, being made and mixing with air Spray fuel particles.

The case where being flowed from all directions evenly towards spray orifice to the fuel moved along spray orifice surface current and from certain side To when being compared the case where flowing towards spray orifice, if identical fuel injection amount, then compare the former, the latter along spray orifice The dynamic speed fuel of surface current is very fast.By being set as flowing from certain orientation towards spray orifice, the micronized for spraying fuel can be promoted.

A kind of inner surface formation direction in fuel injection valve is disclosed in Japanese Unexamined Patent Publication 2007-211735 bulletin The technology for the slot that spray orifice extends.Make the fuel stream high speed by slot compared with the fuel stream for not passing through slot according to the technology, Expect that the fuel for having passed through slot primely reaches spray orifice.That is, expecting that the fuel flowed from certain orientation towards spray orifice primely leads to Spray orifice is crossed, and can promote to spray the micronized of fuel.

Summary of the invention

Problems to be solved by the invention

Although promoting the micronized of injection fuel using above-mentioned technology, also need further to improve.In this specification In, a kind of fuel injection valve of micronized ability further improving injection fuel is disclosed.

The solution to the problem

Fuel injection valve disclosed in this specification includes valve seat, the spray orifice face for being formed with spray orifice and connection valve seat surface With the joint face in spray orifice face, movable valve is abutted relative to the valve seat, is separated, and is formed in the joint face towards spray orifice extension Slot.

Region shape in above-mentioned fuel injection valve, in the front in region, i.e. spray orifice face than valve seat downstream At there is slot.In the case where Japanese Unexamined Patent Publication 2007-211735 bulletin, it is being formed with slot than the region of valve seat on the upstream side, And the relationship that the high velocity fuel for having passed through slot primely passes through spray orifice thickens, in contrast, in above-mentioned fuel injection valve In, it is formed with slot in the region in the front in spray orifice face, therefore, has passed through the high velocity fuel of slot primely by the relationship of spray orifice Become clear.Thus, it is possible to improve the micronized ability of injection fuel.

Illustrate the detailed content of technology disclosed in this specification by aftermentioned " specific embodiment " and " embodiment " It is improved with further.

Detailed description of the invention

Fig. 1 is the cross-sectional view of the fuel injection valve of embodiment 1.

Fig. 2 is with the perspective view for the main portions for being cut into the fuel injection valve of half state representation 1.

Fig. 3 is the enlarged cross-sectional view along the line A-A of Fig. 2.

Fig. 4 is the figure corresponding with Fig. 2 of the fuel injection valve of embodiment 2.

Fig. 5 is the figure corresponding with Fig. 2 of the fuel injection valve of embodiment 3.

Specific embodiment

Enumerate the main feature of embodiments described below.

(feature 1) is formed the joint face of trough of belt by nozzle body.

(feature 2) is formed the joint face of trough of belt by nozzle body and jet orifice plate.

(feature 3) is formed the joint face of trough of belt by jet orifice plate.