JPS62143066U

JPS62143066U -

Info

Publication number: JPS62143066U
Application number: JP3153086U
Authority: JP
Priority date: 1986-03-05
Filing date: 1986-03-05
Publication date: 1987-09-09

Description

[Brief explanation of the drawing]

図面は本考案の一実施例を示し、第１図は側面
図、第２図は第１図中―線の断面図、第３図
は第２図中―線の断面図、第４図は分解した
斜視図、第５図および第６図はそれぞれ高速高出
力運転時および低速低出力運転時の各カム特性と
噴射特性を示す特性図、第７図はカムの作動状態
を説明する図、第８図はカムプロフイルを示す図
、第９図はカム速度の特性図である。１……ポンプ本体、２……シリンダ、３……プ
ランジヤ、４……カム軸、５……カム、６……カ
ムプロフイル、７……タペツトローラ、１０……
プランジヤ室、１５……弁収容室、１６……環状
弁、２０……斜溝、２４……燃料吸入孔、２５，
２６……リンク部材、３５……弁駆動部材、４０
……コントロールスリーブ、４１……コントロー
ルピニオン、４２……コントロールラツク。 The drawings show one embodiment of the present invention, and FIG. 1 is a side view, FIG. 2 is a sectional view taken along the line - in FIG. 1, FIG. 3 is a sectional view taken along the line - in FIG. 2, and FIG. An exploded perspective view, FIGS. 5 and 6 are characteristic diagrams showing each cam characteristic and injection characteristic during high-speed, high-output operation and low-speed, low-output operation, respectively. FIG. 7 is a diagram explaining the operating state of the cam. FIG. 8 is a diagram showing a cam profile, and FIG. 9 is a characteristic diagram of cam speed. 1... Pump body, 2... Cylinder, 3... Plunger, 4... Camshaft, 5... Cam, 6... Cam profile, 7... Tappet roller, 10...
Plunger chamber, 15... Valve accommodation chamber, 16... Annular valve, 20... Diagonal groove, 24... Fuel suction hole, 25,
26...Link member, 35...Valve drive member, 40
...Control sleeve, 41...Control pinion, 42...Control rack.

Claims

[Claim for Utility Model Registration] A plunger driven by a cam is reciprocated in a cylinder provided in the pump body to forcefully feed fuel, and the plunger is placed in a valve housing chamber formed in the middle of the cylinder. An annular valve is fitted on the outside of the plunger and is movable relative to the plunger in the circumferential and axial directions, and the annular valve is rotatably displaced relative to the plunger. The fuel injection amount is controlled by changing the opening/closing timing of a fuel suction hole that is open on the side and communicated with the plunger chamber in the cylinder through the top of the plunger, and the annular valve is displaced in the axial direction with respect to the plunger. In the fuel injection pump that changes the fuel injection timing by opening and closing the fuel intake hole, the cam speed increases in the engine's high-speed, high-output operating range, and the injection timing is delayed in the low-speed, low-output operating range. 1. A fuel injection pump characterized in that a cam profile is set so that a region in which the cam speed is constant or partially decreases can be used in some cases.