JPS6121859U

JPS6121859U - Diesel engine exhaust gas recirculation control device

Info

Publication number: JPS6121859U
Application number: JP10609684U
Authority: JP
Inventors: 謙安藤; 道男川越
Original assignee: トヨタ自動車株式会社
Priority date: 1984-07-13
Filing date: 1984-07-13
Publication date: 1986-02-08

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、本考案に係るディーゼルエンジンの排気ガス
再循環制御装置が採用された、自動車用電子制御ディー
ゼルエンジンの吸気絞り方式の排気ガス再循環装置の第
１実施例の構成を示す、一部断面図及びブロック線図を
含む管路図、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構成を示すブロック線図、第３図
は、同じく、負圧切換弁を制御するための処理手順を示
す流れ図、第４図は、本考案が採用された、自動車用電
子制御ディーゼルエンジンの排気絞り方式の排気ガス再
循環装置の第２実施例の構成を示す、一部断面図及びブ
ロック線図を含む管路図である。１０・・・ディーゼルエンジン、１６・・・排気ガス再
循環通路（ＥＧＲ通路）、１８・・・排気ガス再循環量
制御弁（ＥＧＲ弁）、２０・・・吸気絞り弁、２２・・
・圧力制御弁、２４・・・負荷センサ、２６・・・回転
センサ、Ｎ・・・エンジン回転数、ｄＮ／ｄｔ・・・回
転数変化率、２８・・・電子制御ユニット（ＥＣＵ）、
３０・・・負圧切換弁、３２・・・吸気絞りアクチュエ
ータ、４０・・・排気絞り弁、４２・・・排気絞りアク
チュエータ、Ｋ・・・設定値。FIG. 1 shows the configuration of a first embodiment of an intake throttle type exhaust gas recirculation device for an electronically controlled automobile diesel engine, in which the diesel engine exhaust gas recirculation control device according to the present invention is adopted. FIG. 2 is a block diagram showing the configuration of the electronic control unit used in the first embodiment, and FIG. 3 is a diagram showing the configuration of the electronic control unit used in the first embodiment. FIG. 4 is a flowchart showing the processing procedure for controlling the process, and FIG. FIG. 2 is a pipeline diagram including a partial sectional view and a block diagram. 10... Diesel engine, 16... Exhaust gas recirculation passage (EGR passage), 18... Exhaust gas recirculation amount control valve (EGR valve), 20... Intake throttle valve, 22...
- Pressure control valve, 24... Load sensor, 26... Rotation sensor, N... Engine rotation speed, dN/dt... Rotation speed change rate, 28... Electronic control unit (ECU),
30...Negative pressure switching valve, 32...Intake throttle actuator, 40...Exhaust throttle valve, 42...Exhaust throttle actuator, K...Setting value.

Claims

[Scope of Claim for Utility Model Registration] An exhaust gas recirculation passage that guides a portion of exhaust gas to the engine intake system, an exhaust gas recirculation amount control valve that controls the flow rate of exhaust gas flowing through the exhaust gas recirculation passage, and an engine. Exhaust gas recirculation control means for controlling the exhaust gas recirculation amount control valve according to load and rotation speed; Intake or exhaust throttle means for increasing the intake and exhaust differential pressure to ensure the required amount of exhaust gas recirculation; means for detecting a rate of change in engine speed, and driving the intake or exhaust throttle means in an opening direction during transient operation when the rate of change in engine speed is greater than or equal to a set value;
An exhaust gas recirculation control device for a diesel engine, comprising: an exhaust gas recirculation reducing means for reducing exhaust gas recirculation.