JPS5954737U

JPS5954737U - Diesel engine exhaust gas recirculation control device

Info

Publication number: JPS5954737U
Application number: JP9212182U
Authority: JP
Inventors: 吉田　道保; 東條　輝夫
Original assignee: 三菱自動車工業株式会社
Priority date: 1982-06-20
Filing date: 1982-06-20
Publication date: 1984-04-10

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 drawings]

第１図はアクセルレしく一開度（負荷）と負荷制御弁出
力負圧（ＥＧＲＩＪフトと比例）との関係線図、第２図
はディーゼルエンジンのＥＧＲ制御装置の概要説明図、
第３図はエンジンのコントロールレバーと負圧制御弁（
ＶＲＶ）の連結関係図、第４図は負圧制御弁の断面図、
第５図は負圧制御弁の作動説明図、第６図は従来の負圧
制御弁に関するものでａ図はカム面の形状図、ｂ図はレ
バー開度と負圧制御弁出力負圧の関係図、第７図は本考
案に係る実施例に関するものでａ図はカム面の形状図、
ｂ図はレバー開度と負圧制御弁出力負圧の関係線図Ｃは
エンジン回転数と平均有効圧力を横軸縦軸としたときの
等Ｆ、ＧＲリフ、ト曲線図である。１・・・ディーゼルエンジン、４・・・排気ガス還流通
路（ＥＧＲ通路）、５・・・ＥＧＲ制御弁、６・・・負
圧応動装置、９・・・負圧源（負圧タンク）、１０・・
・負圧通路、１４・・・負圧制御弁（ＶＲＶ）。６ｈ　６Ｇ第４図Figure 1 is a relationship diagram between accelerator opening (load) and load control valve output negative pressure (proportional to EGRIJ), Figure 2 is a schematic explanatory diagram of a diesel engine EGR control device,
Figure 3 shows the engine control lever and negative pressure control valve (
VRV) connection relationship diagram, Figure 4 is a cross-sectional view of the negative pressure control valve,
Fig. 5 is an explanatory diagram of the operation of the negative pressure control valve. Fig. 6 is related to a conventional negative pressure control valve. Fig. a shows the shape of the cam surface, and Fig. b shows the relationship between the lever opening degree and the output negative pressure of the negative pressure control valve. The relationship diagram, Figure 7, relates to an embodiment of the present invention, and Figure a is a diagram of the shape of the cam surface;
Figure b is a graph showing the relationship between the lever opening degree and negative pressure control valve output negative pressure. Figure C is a diagram showing the equal F, GR lift, and tortographs when the horizontal axis and the vertical axis are the engine rotation speed and average effective pressure. DESCRIPTION OF SYMBOLS 1... Diesel engine, 4... Exhaust gas recirculation passage (EGR passage), 5... EGR control valve, 6... Negative pressure response device, 9... Negative pressure source (negative pressure tank), 10...
- Negative pressure passage, 14... negative pressure control valve (VRV). 6h 6G Figure 4

Claims

[Scope of utility model registration request]

E installed in the exhaust gas recirculation passage of a diesel engine
A GR control valve, a negative pressure response device that controls opening and closing of the control valve, a negative pressure passage that communicates the negative pressure response device and a negative pressure source, a load detection device that detects the load of the diesel engine, and a negative pressure response device that controls the opening and closing of the GR control valve. A negative pressure control valve is provided in the load passage and is operated by a signal from a detection device, and the lift of the EGR control valve is controlled to be small at low load and high load, and large at medium load. Diesel engine exhaust gas recirculation control device.