JPS59157549U

JPS59157549U - fuel injection pump

Info

Publication number: JPS59157549U
Application number: JP3939983U
Authority: JP
Inventors: 清則長門
Original assignee: マツダ株式会社
Priority date: 1983-03-17
Filing date: 1983-03-17
Publication date: 1984-10-23
Also published as: JPH0244036Y2

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

図面は本考案の実施態様を例示し、第１図ないし第６図
は実施例１を示し、第１図は燃料噴射ポンプの全体断面
図、第２図は要部断面図、第３図は゛アクチュエータの
平面図、第４図Ａ−Ｄはそれぞれ作動状態を説明する要
部断面図、第５図および第６図は噴射時期の進角特性を
示す説明図、第７図ないし第９図は実施例２を示し、第
７図は概略構成図、第８図は制御回路の変形例を示すブ
ロック図、第９図は第７図における制御回路のフローチ
ャート図、第１０図は実施例３を示す概略構成図である
。 ′１・・・・・・フィードポンプ、３・・・・・・入力
軸、４・・曲燃料供給通路、５・・・・・・ポンプ室、
６・・・・・・レギュレータバルブ、８・・・・・・カ
ム、９・・・・・・プランジャ、１０・・・・・・スピ
ードタイマ機構、１１・・・・・・タイマピストン、１
２・・・・・・ガバナシャフト、１５・・・・・・フラ
イウェイト、１７・・・・・・ガバナスリーブ、２４・
・・・・・コントロールスリーブ、２５ａ・・・・・・
低地用燃料逃し通路、２５ｂ・・・・・・高地用燃料逃
し通路、２６ａ・・・・・・低地用ポート、２６ｂ・・
・・・・高地用ポート、２７・・・・・・タイミングコ
ントロールスリーブ、２８・・・・・・アクチュエータ
、２９・・・・・・制御回路、３０・・・・・・気圧セ
ンサー、３１・・曲ソレノイド、３３・・・・・・アク
チュエータ、３６・・・・・・タイマピストン、４３・
・・・・・圧力制御弁、４４・・・・・・制御回路、５
８・・・・・・アクチュエータ、６１・・・・・・制御
回路。The drawings illustrate embodiments of the present invention, and FIGS. 1 to 6 show Embodiment 1. FIG. 1 is an overall sectional view of the fuel injection pump, FIG. A plan view of the actuator, FIGS. 4A to 4D are cross-sectional views of main parts explaining the operating state, FIGS. 5 and 6 are explanatory diagrams showing the advance characteristics of the injection timing, and FIGS. 7 to 9 are Embodiment 2 is shown, FIG. 7 is a schematic configuration diagram, FIG. 8 is a block diagram showing a modification of the control circuit, FIG. 9 is a flowchart of the control circuit in FIG. 7, and FIG. 10 is a diagram showing the third embodiment. FIG. '1...Feed pump, 3...Input shaft, 4...Curved fuel supply passage, 5...Pump chamber,
6...Regulator valve, 8...Cam, 9...Plunger, 10...Speed timer mechanism, 11...Timer piston, 1
2...Governor shaft, 15...Fly weight, 17...Governor sleeve, 24...
...Control sleeve, 25a...
Low-altitude fuel relief passage, 25b... High-altitude fuel relief passage, 26a... Low-altitude port, 26b...
...High altitude port, 27...Timing control sleeve, 28...Actuator, 29...Control circuit, 30...Barometric pressure sensor, 31... - Curved solenoid, 33... Actuator, 36... Timer piston, 43...
...Pressure control valve, 44...Control circuit, 5
8... Actuator, 61... Control circuit.

Claims

[Scope of utility model registration request]

(1) An injection timing variable device that changes the fuel injection timing;
An atmospheric pressure detection device detects atmospheric pressure, a load detection device detects the engine load state, and the injection timing is advanced in the advance direction when the atmospheric pressure is low and the load is low according to the output of the rain detection device. 1. A fuel injection system comprising: an injection timing control device that drives an injection timing variable device to retard the injection timing when under load.

(2) The injection timing variable device is composed of a speed timer mechanism that controls the injection timing by fuel pressure according to the engine rotation speed, and the injection timing control device is configured with a low-altitude and high-altitude fuel relief passage formed in the governor shaft. , a governor sleeve that is fitted to the governor shaft and slides on the governor shaft in accordance with the fuel injection amount; a low-altitude port and a high-altitude port that are fitted to the governor sleeve; 2. The fuel injection pump according to claim 1, wherein the fuel injection pump is provided with a timing control sleeve that opens and closes ports for high altitude and high altitude use, and is configured to drive the timing control sleeve in accordance with the output of an atmospheric pressure detection device.

(3) An actuator in which the injection timing variable device varies the injection timing by changing the phase between the input shaft of the fuel injection pump and a cam that drives the plunger, and a pressure control valve that controls the operating pressure acting on the actuator. The fuel according to claim 1, wherein the injection timing control device is configured to generate an output signal for driving the pressure control valve in response to signals from at least an atmospheric pressure detection device and a load detection device. injection pump.