PROBLEM TO BE SOLVED: To provide an exhaust gas circulation trouble diagnosis apparatus for a hybrid vehicle in which trouble diagnosis for an exhaust gas circulation apparatus may be carried out even under a state where battery reception property of the traveling battery is reduced, while protecting a traveling battery by restriction of target battery charging electric power.SOLUTION: When execution requirement for trouble diagnosis in an exhaust gas circulation apparatus 21 is accomplished during traveling under series mode, an engine 3 is driven in a target drive point within a previously set monitor region to carry out trouble diagnosis. At that time, if it is determined that battery reception property which should restricts battery charging power to a traveling battery 15 is reduced, the drive point of the engine 3 is switched to load reduction direction and gets out from the monitor region (from [black dot] to ○ in Figures). Therefore, by reducing rotation speed while keeping load on the engine 3, the trouble diagnosis may be carried out while retaining the drive point in the monitor region (from [black dot] to [square] in Figures).SELECTED DRAWING: Figure 3
【課題】走行バッテリの電池受入れ性の低下時においても、目標充電電力の制限により走行バッテリを保護しつつ、排ガス循環装置の故障診断を実施できるハイブリッド車両の排ガス循環故障診断装置を提供する。【解決手段】シリーズモードでの走行中に排ガス循環装置21の故障診断の実施条件が成立すると、予め設定したモニタ領域内の目標運転点でエンジン3を運転して故障診断を実施する。このときに走行バッテリ15への充電電力を制限すべき電池受入れ性の低下判定が下されると、エンジン3の運転点が負荷低下方向に切り換えられてモニタ領域を逸脱してしまう(図中の●から○)。そこで、エンジン3の負荷を保ちつつ回転速度を低下させることにより、運転点をモニタ領域内に保って故障診断を実施可能とする(図中の●から□)。【選択図】図3
EXHAUST GAS CIRCULATION TROUBLE DIAGNOSIS APPARATUS FOR HYBRID VEHICLE
ハイブリッド車両の排ガス循環故障診断装置
2017-09-28
Patent
Electronic Resource
Japanese
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 / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / F02M Zuführen von Brennstoff-Luft-Gemischen oder deren Bestandteilen bei Brennkraftmaschinen allgemein , SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF |
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