To provide a misfire determination device for an internal combustion engine capable of suppressing deterioration of accuracy of misfire determination.SOLUTION: A misfire determination device for an internal combustion engine includes: an engine rotating speed acquisition part 111 acquiring a rotating speed of a crankshaft of the engine; a damper rear-stage rotating speed acquisition part 114 acquiring a damper rear-stage rotating speed that is a rotating speed of a carrier shaft connected to a driving wheel side of the crankshaft via a damper; a communication path selection part 113 selecting a path with higher communication reliability out of a first path directly acquiring the damper rear-stage rotating speed from a motor ECU controlling a motor in cooperation with the carrier shaft and a second path acquiring the damper rear-stage rotating speed from the motor ECU via an HV-ECU; a resonance influence component calculation part 115 calculating a resonance influence component on the basis of the rotating speed and the acquired damper rear-stage rotating speed; and a misfire determination part 116 determining misfire of the engine on the basis of a misfire determination rotating speed obtained by subtracting the resonance influence component from the rotating speed.SELECTED DRAWING: Figure 3

    【課題】失火判定の精度低下を抑制することが可能な内燃機関の失火判定装置を提供する。【解決手段】エンジンのクランクシャフトの回転速度を取得するエンジン回転速度取得部111と、クランクシャフトに対してダンパを介して駆動輪側に接続されたキャリア軸の回転速度であるダンパ後段回転速度を取得するダンパ後段回転速度取得部114と、キャリア軸と連動するモータを制御するモータECUからダンパ後段回転速度を直接取得する第1の経路とモータECUからHV-ECUを経由してダンパ後段回転速度を取得する第2の経路のうち通信の信頼性の高い経路を選択する通信経路選択部113と、回転速度と、取得したダンパ後段回転速度とに基づいて共振影響成分を算出する共振影響成分算出部115と、回転速度から共振影響成分を減算して得られる失火判定用回転速度に基づいてエンジンの失火判定を行う失火判定部116と、を備える。【選択図】図3


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    Title :

    MISFIRE DETERMINATION DEVICE FOR INTERNAL COMBUSTION ENGINE


    Additional title:

    内燃機関の失火判定装置


    Contributors:

    Publication date :

    2022-02-17


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / 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



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