JPS61128345U

JPS61128345U -

Info

Publication number: JPS61128345U
Application number: JP1249685U
Authority: JP
Priority date: 1985-01-31
Filing date: 1985-01-31
Publication date: 1986-08-12

Description

[Brief explanation of the drawing]

第１図はこの考案の一実施例の全体構成図であ
る。第２図Ａ，Ｂは前記実施例における可変開度
規制手段にあたるストツパリンク装置の詳細を示
したもので、図Ａは平面図、図Ｂは側面図である
。第３図は同じく実施例の制御系統の制御動作を
概略的に表す流れ図である。第４図は従来のＥＧ
Ｒ装置の概略構成図、第５図はその制御指令値と
電磁弁の作動及びＥＧＲ率との関係を表す表図、
第６図は前記制御指令値と運転状態との関係を表
す制御特性図である。２……機関吸気通路、４……排気通路、５……
ＥＧＲ通路、６……吸気絞り弁、６Ａ……弁軸、
７……ＥＧＲ制御弁、８，１３……ダイアフラム
装置（負圧駆動装置）、１０……真空ポンプ（負
圧源）、１１……制御回路、１２，１６，１７…
…三方電磁弁、１８……負荷センサ、１９……回
転センサ、２０……水温センサ、３０……ストツ
パリンク装置、３１……スロツトルボデイ、３３
……ストツパアーム、３４……調節用ネジ、３５
……可動ストツパ、３８……ソレノイドアクチユ
エータ。 FIG. 1 is an overall configuration diagram of an embodiment of this invention. FIGS. 2A and 2B show details of the stopper link device, which is the variable opening regulating means in the embodiment, with FIG. 2A being a plan view and FIG. 2B being a side view. FIG. 3 is a flowchart schematically showing the control operation of the control system of the embodiment. Figure 4 shows the conventional EG
A schematic configuration diagram of the R device; FIG. 5 is a table showing the relationship between the control command value, the operation of the solenoid valve, and the EGR rate;
FIG. 6 is a control characteristic diagram showing the relationship between the control command value and the operating state. 2...Engine intake passage, 4...Exhaust passage, 5...
EGR passage, 6...Intake throttle valve, 6A...Valve stem,
7... EGR control valve, 8, 13... Diaphragm device (negative pressure drive device), 10... Vacuum pump (negative pressure source), 11... Control circuit, 12, 16, 17...
... Three-way solenoid valve, 18 ... Load sensor, 19 ... Rotation sensor, 20 ... Water temperature sensor, 30 ... Stopper link device, 31 ... Throttle body, 33
... Stopper arm, 34 ... Adjustment screw, 35
...Movable stopper, 38...Solenoid actuator.

Claims

[Scope of utility model registration request]

A plurality of negative pressure drive devices that respectively drive an EGR control valve and an intake throttle valve, a plurality of solenoid valves that control operating negative pressure supplied to the negative pressure drive devices, and a plurality of electromagnetic valves that control an EGR command value according to an engine operating state. In a diesel engine equipped with a control system that outputs output to a solenoid valve to variably control an EGR rate, the minimum opening position of the intake throttle valve is set to a fully closed position that blocks intake airflow and a predetermined amount of airflow that is allowed. A variable opening regulating means is provided that regulates the opening to at least two positions including a minimum control opening position, and the variable opening regulating means is set to the minimum control opening position when the engine is running, and to the full opening position when an engine stop condition is detected. 1. An exhaust gas recirculation device for a diesel engine, characterized in that the control system is configured to drive each to a closed position.