JPH0462352U

JPH0462352U -

Info

Publication number: JPH0462352U
Application number: JP10455690U
Authority: JP
Priority date: 1990-10-05
Filing date: 1990-10-05
Publication date: 1992-05-28

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例による燃料噴射ポン
プの等圧弁装置３０のデリバリバルブホルダ２部
分の要部縦断面図、第２図は第１図とは直角な方
向における要部断面図、第３図は第１図の−
線方向矢視図、第４図は従来の燃料噴射ポンプ１
のデリバリバルブホルダ２部分の要部縦断面図、
第５図は第４図の線矢視図、第６図は第４図の
−線拡大断面図である。１……燃料噴射ポンプ、２……デリバリバルブ
ホルダ、３……燃料出口、４……噴射管、５……
噴射ノズル、６……デリバリバルブシート、７…
…デリバリバルブ収容孔、８……デリバリバルブ
、８Ａ……シート用内底面、９……デリバリバル
ブ８のロツド部、１０……デリバリバルブ８のシ
ート部、１１……デリバリバルブ８の円筒部、１
２……羽根部、１３……燃料吐出用通路、１４…
…分配通路、１５……デリバリバルブセツトスプ
リング、１６……シート面、１７……デリバリバ
ルブ室、１８……等圧弁収納室、１９……等圧弁
装置、２０……燃料戻し用通路、２１……等圧弁
ホルダ、２２……（第１の）ボールバルブ（弁体
）、２３……（第１の）等圧弁スプリングシート
、２４……等圧弁セツトスプリング、２５……（
第１の）等圧弁シート部、２６……（第１の）オ
リフイス、２７……連通用の切欠き、３０……燃
料噴射ポンプの等圧弁装置、３１……第２のオリ
フイス、３２……第２のボールバルブ（弁体）、
３３……第２の等圧弁シート部、３４……第２の
等圧弁スプリングシート、３５……燃料戻し用通
路。 FIG. 1 is a vertical cross-sectional view of a main part of a delivery valve holder 2 portion of an equal pressure valve device 30 for a fuel injection pump according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part in a direction perpendicular to FIG. Figure 3 is - of Figure 1.
Linear arrow view, Figure 4 shows a conventional fuel injection pump 1
A longitudinal sectional view of the main parts of the delivery valve holder 2 part,
5 is a view taken along the line in FIG. 4, and FIG. 6 is an enlarged sectional view taken along the line -- in FIG. 1...Fuel injection pump, 2...Delivery valve holder, 3...Fuel outlet, 4...Injection pipe, 5...
Injection nozzle, 6...Delivery valve seat, 7...
... Delivery valve housing hole, 8 ... Delivery valve, 8A ... Inner bottom surface for seat, 9 ... Rod part of delivery valve 8, 10 ... Seat part of delivery valve 8, 11 ... Cylindrical part of delivery valve 8, 1
2...Blade portion, 13...Fuel discharge passage, 14...
...Distribution passage, 15... Delivery valve set spring, 16... Seat surface, 17... Delivery valve chamber, 18... Equal pressure valve storage chamber, 19... Equal pressure valve device, 20... Fuel return passage, 21... ... Equal pressure valve holder, 22 ... (first) ball valve (valve body), 23 ... (first) equal pressure valve spring seat, 24 ... Equal pressure valve set spring, 25 ... (
1st) equal pressure valve seat portion, 26... (first) orifice, 27... communication notch, 30... equal pressure valve device of fuel injection pump, 31... second orifice, 32... second ball valve (valve body),
33...Second equal pressure valve seat portion, 34...Second equal pressure valve spring seat, 35...Fuel return passage.

Claims

[Claims for Utility Model Registration] An equal pressure valve device provided in a delivery valve that opens and closes a fuel outlet of a fuel injection pump, which accommodates the delivery valve and allows high-pressure fuel from a fuel discharge passage to pass therethrough. At least two orifices are formed that allow communication between a delivery valve chamber that opens to the fuel outlet and an equal pressure valve housing chamber that is formed within the delivery valve and communicates with the fuel return passage. An equal pressure valve device for a fuel injection pump, characterized in that it is provided with at least two valve bodies capable of opening and closing each of these orifices.