To appropriately secure opportunity for implementing an engine diagnosis including diagnosis of abnormality of a fuel pressure sensor.SOLUTION: An engine diagnosis device 36 mounted on a hybrid vehicle drives an electric feed pump 24 to implement first diagnosis processing for diagnosing whether or not an abnormality occurs in a low-pressure side fuel pressure sensor 30 which detects pressure of fuel in a fuel passage through which fuel fed out by the electric feed pump 24 flows, during intermittent stopping of an engine. Further the engine diagnosis device 36 implements second diagnosis processing for diagnosing whether or not an abnormality occurs in an exhaust sensor 39 installed in an exhaust passage of the engine, during fuel cutoff of the engine. The engine diagnosis device 36 implements the first diagnosis processing during the fuel cutoff as well, under the condition that the second diagnosis processing is not implemented.SELECTED DRAWING: Figure 3

    【課題】燃圧センサの異常診断を含むエンジン診断の実施機会を好適に確保する。【解決手段】ハイブリッド車両に搭載のエンジン診断装置36は、電動フィードポンプ24を駆動して、同電動フィードポンプ24が送出した燃料が流れる燃料通路内の燃料の圧力を検出する低圧側燃圧センサ30の異常の有無を診断する第1診断処理を、エンジンの間欠停止中に実施する。また、エンジン診断装置36は、エンジンの排気通路に設置された排気センサ39の異常の有無を診断する第2診断処理を、エンジンの燃料カット中に実施する。こうしたエンジン診断装置36において、第2診断処理を実施していないことを条件に燃料カット中にも第1診断処理を実施するようにした。【選択図】図3


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    Titel :

    ENGINE DIAGNOSIS DEVICE


    Weitere Titelangaben:

    エンジン診断装置


    Beteiligte:

    Erscheinungsdatum :

    28.08.2023


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Japanisch


    Klassifikation :

    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 / 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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