JPS6141859U

JPS6141859U - Exhaust gas recirculation control device for diesel engine with supercharger

Info

Publication number: JPS6141859U
Application number: JP12784384U
Authority: JP
Inventors: 三津夫月見里
Original assignee: トヨタ自動車株式会社
Priority date: 1984-08-23
Filing date: 1984-08-23
Publication date: 1986-03-17

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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は、本考案に係る過給機付ディーゼルエンジンの
排気ガス再循環制御装置の第１実施例の構成を示ザ断面
図、第２図は、前記第１実施例で用いられている電子制
御ユニットの処理手順を示す流れ図、第３図は、前記第
１実施例における排気ガス再循環通路開閉弁及び吸気バ
イパス通路開閉弁の開度と各部圧力の関係の例を示す線
図、′第、４図は、本考案に係る過給機付ディーゼルエ
ンジンの排気ガス再循環制御装置の第２実施例の構成を
示す断面図である。１０・・・ディーゼルエンジン、１２・・・吸気管、１
４・・・過給機、１６・・・排気管、１Ｂ・・・排気ガ
ス再循環（ＥＧＲ）通路、２０・・・ＥＧＲ通路開閉弁
、３０，４２・・・ダイヤフラムアクチュエータ、３２
，４６・・・負圧源、３４．４８・・・負圧制御弁、３
６・・・吸気バイパス通路、３８・・・吸気バイパス通
蕗開閉弁、５０・・・電子制御ユニツ上（ＥＣＵ）。FIG. 1 is a sectional view showing the configuration of a first embodiment of the exhaust gas recirculation control device for a supercharged diesel engine according to the present invention, and FIG. 3 is a flowchart showing the processing procedure of the electronic control unit; FIG. 3 is a diagram showing an example of the relationship between the opening degree of the exhaust gas recirculation passage opening/closing valve and the intake bypass passage opening/closing valve and the pressure of each part in the first embodiment; 4 are sectional views showing the structure of a second embodiment of the exhaust gas recirculation control device for a supercharged diesel engine according to the present invention. 10...Diesel engine, 12...Intake pipe, 1
4...Supercharger, 16...Exhaust pipe, 1B...Exhaust gas recirculation (EGR) passage, 20...EGR passage opening/closing valve, 30, 42...Diaphragm actuator, 32
, 46... Negative pressure source, 34.48... Negative pressure control valve, 3
6... Intake bypass passage, 38... Intake bypass opening/closing valve, 50... Electronic control unit (ECU).

Claims

[Scope of utility model registration request]

(1) An exhaust gas recirculation control device for a turbocharged diesel engine having a supercharger that increases intake pressure, an exhaust pipe, and an exhaust gas recirculation passage that communicates the downstream side of the supercharger with the intake pipe, an exhaust gas recirculation passage opening/closing valve that opens and closes an intake pipe side outlet of the exhaust gas recirculation passage toward the intake downstream side; an intake upstream side and an exhaust downstream side of the exhaust gas recirculation passage;
An intake bypass passage that communicates the intake pipe downstream of the supercharger with the exhaust pipe; An intake bypass passage opening/closing valve that opens and closes the intake bypass passage; and opening/closing valve control means that controls opening of the exhaust gas recirculation passage opening/closing valve and the intake bypass passage opening/closing valve during exhaust gas recirculation. Features: Exhaust gas recirculation control device for turbocharged diesel engines.

(2) Utility model registration claim 1, in which the opening of the intake bypass passage to the exhaust pipe is directed toward the exhaust upstream side.
Exhaust gas recirculation control device for a diesel engine with a supercharger as described in 2. ′