JPH027359U

JPH027359U -

Info

Publication number: JPH027359U
Application number: JP8459988U
Authority: JP
Priority date: 1988-06-27
Filing date: 1988-06-27
Publication date: 1990-01-18

Description

[Brief explanation of the drawing]

第１図は本考案第１実施例のパイロツト噴射装
置の断面図、第２図は同じくそのパイロツト噴射
装置を備えた燃料噴射ポンプの概略構成図、第３
図は本考案の第２実施例のパイロツト噴射装置の
断面図、第４図は本考案の第３実施例のパイロツ
ト噴射装置の断面図、第５図、第６図は第４図の
Ａ―Ａ端面図である。１…燃料噴射ポンプ、１０…加圧室、２０…パ
イロツト噴射装置、４３…アキユームレートピス
トン、４３ｂ…段付ジヤーナル部、４５…ストツ
パ、４６…スプリング、４７…プレツシヤピン、
４８…第１背圧室、４９…第２背圧室、５１…キ
ヤツプ。 FIG. 1 is a sectional view of a pilot injection device according to a first embodiment of the present invention, FIG. 2 is a schematic configuration diagram of a fuel injection pump similarly equipped with the pilot injection device, and FIG.
The figure is a sectional view of a pilot injection device according to a second embodiment of the present invention, FIG. 4 is a sectional view of a pilot injection device according to a third embodiment of the present invention, and FIGS. 5 and 6 are A-- It is an A end view. DESCRIPTION OF SYMBOLS 1... Fuel injection pump, 10... Pressurization chamber, 20... Pilot injection device, 43... Accumulation rate piston, 43b... Stepped journal part, 45... Stopper, 46... Spring, 47... Pressure pin,
48...first back pressure chamber, 49...second back pressure chamber, 51...cap.

Claims

[Scope of Claim for Utility Model Registration] A cylinder communicating with a pressurizing chamber of a fuel injection pump; an accumulation piston that is fitted into the cylinder and is pressed and moved as the fuel pressure in the pressurizing chamber increases; a limiting member having a loosely fitting portion through which the narrow rear end portion of the accumulation rate piston passes loosely, and limiting the amount of movement of the accumulation rate piston as fuel pressure increases in the pressurizing chamber; A holding member disposed on the opposite side of the cylinder and interlocking with the accumulation rate piston, and a spring pressing the holding member to urge the accumulation rate piston toward the side facing the fuel pressure. A pilot injection device for a fuel injection pump, comprising: a regulating member that regulates the amount of movement of the holding member due to movement of the accumulation rate piston through engagement, the loose fitting portion, the holding member, and the holding member; At least one portion of the engagement portion between the member and the regulating member is provided with a flow rate limiting portion that limits the flow rate of the fuel flowing due to the press movement of the accumulation rate piston as the fuel pressure increases in the pressurizing chamber. A pilot injection device for a fuel injection pump characterized by: