JPH01102472U

JPH01102472U -

Info

Publication number: JPH01102472U
Application number: JP19754487U
Authority: JP
Priority date: 1987-12-28
Filing date: 1987-12-28
Publication date: 1989-07-11

Description

【図面の簡単な説明】第１図は本考案の望ましい実施例に係る内燃機
関用燃料噴射弁の、燃料噴孔、デツドボリユーム
部、噴射燃料通路とそれらの近傍部の断面図、第
２図は第１図の―線に沿う断面図、第３図は
第１図の装置の底面図、第４図は第１図の燃料噴
射弁の全体断面図、第５図は燃料が流れている状
態の第１図の装置の断面図、第６図は燃料流れの
ベクトル合成図、第７図は第１図における柱と噴
射燃料通路近傍の拡大断面図、第８図はデツドボ
リユーム部の底面が第１図の態様と異なる、本考
案の他の態様に係る、内燃機関用燃料噴射弁の先
端部近傍の断面図、である、２……燃料噴射弁、４……インジエクタボデー
、６……アダプタ、２４……燃料噴孔、２８……
デツドボリユーム部、３２……デツドボリユーム
部の底面、３６，３８，４０……噴射燃料通路、
４４……柱、４６……柱の側面、４８……柱の頂
面、５０……噴霧柱。[Brief Description of the Drawings] Fig. 1 is a sectional view of the fuel injection hole, dead volume portion, injected fuel passage and their vicinity of a fuel injection valve for an internal combustion engine according to a preferred embodiment of the present invention; Figure 3 is a bottom view of the device in Figure 1, Figure 4 is an overall cross-sectional view of the fuel injection valve in Figure 1, and Figure 5 is a state in which fuel is flowing. Fig. 6 is a vector composite diagram of fuel flow, Fig. 7 is an enlarged sectional view of the vicinity of the column and the injection fuel passage in Fig. 1, and Fig. 8 shows that the bottom of the dead volume section is 1 is a cross-sectional view of the vicinity of the tip of a fuel injection valve for an internal combustion engine according to another aspect of the present invention, which is different from the aspect shown in FIG. Adapter, 24...Fuel injection hole, 28...
Dead volume part, 32...bottom surface of the dead volume part, 36, 38, 40...injection fuel passage,
44...Column, 46...Side surface of column, 48...Top surface of column, 50...Spray column.

Claims

[Claims for Utility Model Registration] (1) An injector body having a longitudinal axis and having a single fuel injection hole for metering injected fuel having an axis on the longitudinal axis. defined by a concave surface having a side surface and a bottom surface formed on an adapter attached to the injector body and a lower surface of the injector body, and located downstream of the fuel nozzle hole; a dead volume part that is connected to the nozzle hole and has the same axis as the longitudinal axis of the injector body; a dead volume part that is formed in the adapter so as to penetrate through the adapter and is located downstream of the dead volume part; a plurality of opening ends to the dead volume portion are arranged circumferentially at equal intervals around the longitudinal axis of the injector body, and are each inclined from the longitudinal axis of the injector body. an injection fuel passageway extending from the bottom surface of the concave surface of the adapter into the dead volume portion toward the fuel nozzle hole of the injector body, and being separated downstream from the side surface and the fuel nozzle hole and communicating with the fuel; A fuel injection valve for an internal combustion engine, comprising: a column having a top surface facing an injection hole and having an axis coaxial with the longitudinal axis of the injector body. (2) The fuel injection valve for an internal combustion engine according to claim 1, wherein the top surface of the pillar has a substantially circular shape in a direction perpendicular to the longitudinal axis of the injector body. (3) The fuel injection valve for an internal combustion engine according to claim 1, wherein the top surface of the pillar is a flat surface. (4) The number of the injection fuel passages is three, the cross section of the injection fuel passage in a direction perpendicular to the axis of the injection fuel passage is circular, and the opening end of each of the injection fuel passages to the dead volume portion The fuel injection valve for an internal combustion engine according to claim 1, wherein the centers of the injector bodies are arranged on the same circumference around the longitudinal axis of the injector body.