JPS6220142U

JPS6220142U -

Info

Publication number: JPS6220142U
Application number: JP11183685U
Authority: JP
Priority date: 1985-07-23
Filing date: 1985-07-23
Publication date: 1987-02-06

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例の全体構成を示す図
、第２図Ａ〜Ｄは夫々同上実施例における各種切
換位置における要部位置を示す断面図、第３図は
先行技術例を示す断面図である。１……ポンプハウジング、２ａ……嵌挿孔、３
……プランジヤ、６……高圧室、１０……第１の
スピルポート、１１……第２のスピルポート、１
２……第１のコントロールスリーブ、１３……第
２のコントロールスリーブ、１４……コントロー
ルレバー、１５……レバー、１６……コレクタレ
バー、１９……テンシヨンレバー、３１……アク
チユエータ、３２……制御回路。 Fig. 1 is a diagram showing the overall configuration of an embodiment of the present invention, Figs. 2 A to D are sectional views showing the positions of important parts at various switching positions in the above embodiment, respectively, and Fig. 3 shows an example of the prior art. FIG. 1... Pump housing, 2a... Fitting hole, 3
...Plunger, 6...High pressure chamber, 10...First spill port, 11...Second spill port, 1
2... First control sleeve, 13... Second control sleeve, 14... Control lever, 15... Lever, 16... Collector lever, 19... Tension lever, 31... Actuator, 32... control circuit.

Claims

[Scope of Claim for Utility Model Registration] A plunger that reciprocates in the axial direction and rotates around the axis causes a high pressure chamber inside the pump housing to be formed between the plunger and the insertion hole into which the tip of the plunger is inserted. In a distribution type fuel injection pump for an internal combustion engine, which sucks fuel from a space and then distributes the fuel to fuel injection valves installed in each cylinder of the engine, the plunger has a base end portion facing the inner space of the pump housing. Two spill ports communicating with the high pressure chamber are opened apart in the axial direction of the plunger, and the spill ports are fitted into the plunger so as to be freely movable in the axial direction by engaging with a collector lever linked to the accelerator operating mechanism of the engine. a first control sleeve that controls the fuel injection start timing by controlling the communication/blocking state of the spill port with the space inside the pump housing; a second control sleeve that is fitted so as to be freely movable in the axial direction and controls the fuel injection end timing by controlling communication/blocking state of the other spill port with the pump housing inner space; and an accelerator operation of the collector lever. an actuator that can freely operate independently of the mechanism; and by operating the actuator to forcibly move the collector lever, the first control sleeve is moved to a position where the one spill port is always in a blocked state at the time of starting. move it,
To eliminate the delay in the fuel injection start timing, the first control sleeve is moved in a direction that delays the fuel injection start timing during idling or low-medium speed/low-medium load operation, and the second control sleeve is moved through the tension lever. The sleeve is moved in a direction that delays the fuel injection end timing to reduce the fuel injection rate, and during operations other than the above, the first control sleeve is moved in a direction that minimizes the delay in the start of fuel injection, and the tension lever is moved. 1. A distribution type fuel injection pump for an internal combustion engine, comprising: fuel injection rate control means for increasing the fuel injection rate by moving a second control sleeve in a direction to advance the fuel injection end timing through the fuel injection pump.