To improve accuracy of a failure determination of an EGR system while maintaining combustion stability of an engine in a failure determination device.SOLUTION: A failure determination device 20 is for an EGR system 6 applied to an engine 1 outputting driving force for causing a generator 2 to generate electric power. The failure determination device 20 includes: first determination means 25 for determining failure of an EGR valve 7 interposed in an exhaust recirculation flow passage of the EGR system 6; and second determination means 26 for determining whether a failure state of the EGR valve 7 is opening failure that prevents a closing operation with respect to a closing command or closing failure that prevents an opening operation with respect to an opening command when the failure of the EGR valve 7 is determined by the first determination means 25. A determination condition of the opening failure in the second determination means 26 is different from that of the closing failure in the second determination means 26.SELECTED DRAWING: Figure 1

    【課題】故障判定装置に関し、エンジンの燃焼安定性を維持しながらEGRシステムの故障判定の精度を改善する。【解決手段】開示の故障判定装置20は、ジェネレータ2に発電させるための駆動力を出力するエンジン1に適用されるEGRシステム6の故障判定装置20であって、EGRシステム6の排気還流路に介装されるEGR弁7の故障を判定する第一判定手段25と、第一判定手段25でEGR弁7の故障が判定された場合に、EGR弁7の故障状態が閉じ指令に対して閉作動しない開故障なのか開き指令に対して開作動しない閉故障なのかを判定する第二判定手段26と、を備える。第二判定手段26における開故障の判定条件は、第二判定手段26における閉故障の判定条件と相違する。【選択図】図1


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    Title :

    FAILURE DETERMINATION DEVICE


    Additional title:

    故障判定装置


    Contributors:
    SAWADA TORU (author) / INOUE KOTA (author) / SATO HIROAKI (author)

    Publication date :

    2023-02-16


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60W CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION , Gemeinsame Steuerung oder Regelung von Fahrzeug-Unteraggregaten verschiedenen Typs oder verschiedener Funktion / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen



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