NOx GENERATION AMOUNT CONTROL DEVICE

• Main Authors: ISHII DAIKI, ONODERA TAKAO, HANAWA TETSUSHI, SAITO HODAKA, YAMAURA KAZUTAKA, HANAMURA YOSHIFUMI
• Format: Patent
• Language: English; Japanese
• Published: 25.03.2024
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

To perform a control so as to emit NOx in an amount suitable for a traveling state.SOLUTION: A NOx generation amount control device 60 has: an emission amount calculation unit 631 for calculating a NOx emission amount on the basis of NOx concentration detected at a downstream side of a SCR device and displacement of an engine at a prescribed time interval; an integrated amount calculation unit 632 for calculating a NOx integrated amount obtained by adding a plurality of NOx emission amounts; a specifying unit 633 for specifying a target value of the NOx integrated amount related to a travel distance of a moving body equipped with an engine or an output value of the engine; an estimation unit 634 for estimating a NOx estimation amount indicating an estimated integrated amount of NOx on the basis of the engine speed and fuel injection amount; a determination unit 635 for determining whether the total of the NOx estimation amount and the NOx integrated amount is over the target value or not; and a decision unit for deciding an NOx emission scheduled amount for every prescribed time interval and deciding at least either of an opening of an EGR valve 30 and an opening of a turbocharger 20.SELECTED DRAWING: Figure 2 【課題】走行状態に適した量のＮＯｘを排出するように制御する。【解決手段】ＮＯｘ発生量制御装置６０は、所定の時間間隔ごとに、ＳＣＲ装置の下流側で検出されたＮＯｘ濃度とエンジンの排気量とに基づいてＮＯｘ排出量を算出する排出量算出部６３１と、複数のＮＯｘ排出量を加算したＮＯｘ積算量を算出する積算量算出部６３２と、エンジンを備える移動体の移動距離又はエンジンの出力値に関連付けられたＮＯｘ積算量の目標値を特定する特定部６３３と、エンジンの回転数と燃料噴射量とに基づいて、ＮＯｘの予測積算量を示すＮＯｘ予測量を推定する推定部６３４と、ＮＯｘ予測量とＮＯｘ積算量との合計が目標値を超えるか否かを判定する判定部６３５と、所定の時間間隔ごとのＮＯｘ排出予定量を決定し、ＥＧＲバルブ３０の開度及びターボチャージャー２０の開度の少なくともいずれかを決定する決定部と、を有する。【選択図】図２