ENGINE DEVICE

PROBLEM TO BE SOLVED: To enable control of both of PM amount suppression and NOx amount suppression in exhaust gas from an engine 70.SOLUTION: An engine device includes: an engine 70; a fuel injection device 117 for injecting fuel to the engine 70; a supercharger 100 driven by exhaust gas from an ex...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: HASHIMOTO YUNOSUKE, SHIRAMIZU TOSHIKI, IWASE ATSUHITO, KUNISAWA KEIJI, OTANI TOMOHIRO
Format: Patent
Sprache:eng ; jpn
Schlagworte:
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:PROBLEM TO BE SOLVED: To enable control of both of PM amount suppression and NOx amount suppression in exhaust gas from an engine 70.SOLUTION: An engine device includes: an engine 70; a fuel injection device 117 for injecting fuel to the engine 70; a supercharger 100 driven by exhaust gas from an exhaust system; an EGR device 90 for recirculating a part of the exhaust gas from the exhaust system to an intake system as EGR gas; an aftertreatment device 50 for purifying the exhaust gas from the exhaust system; speed detection means 14 for detecting an engine speed N; boost pressure detection means 85 for detecting a boost pressure P of the intake system; and an engine ECU 11 for controlling operation of the engine 70. When a change of the engine speed M becomes below a predetermined value, a change of a fuel injection amount Q exceeds a predetermined value and the boost pressure P exceeds a predetermined value, the engine ECU 11 opens an EGR valve 94 of the EGR device 90 to an intermediate opening.SELECTED DRAWING: Figure 4 【課題】エンジン70からの排気ガス中のPM量抑制とNOx量抑制とを両立させて制御できるようにする。【解決手段】本願発明のエンジン装置は、エンジン70と、エンジン70に燃料を噴射する燃料噴射装置117と、排気系からの排気ガスで駆動する過給機100と、排気系からの排気ガスの一部をEGRガスとして吸気系に還流させるEGR装置90と、排気系からの排気ガスを浄化する後処理装置50と、エンジン回転速度Nを検出する回転速度検出手段14と、吸気系の過給圧Pを検出する過給圧検出手段85と、前記エンジン70の駆動を制御するエンジンECU11とを備える。エンジンECU11は、エンジン回転速度Nの変化が所定値を下回ると共に燃料噴射量Qの変化が所定値を上回り且つ過給圧Pが所定値を上回る場合に、前記EGR装置90のEGR弁94を中間開度に開弁させる。【選択図】図4