To provide a technique for monitoring the abnormality of an exhaust emission control catalyst due to poor warming-up right after starting an internal combustion engine.SOLUTION: An exhaust emission control system for a hybrid vehicle having the internal combustion engine and an electric motor as driving sources includes the exhaust emission control catalyst provided in an exhaust passage of the internal combustion engine, an exhaust sensor provided in the exhaust passage at its downstream side further than the exhaust emission control catalyst for enabling the measurement of concentration of nitrogen oxide, and an abnormality signal generation part constructed to generate an abnormality signal on the basis of the detection result of the nitrogen oxide measured by the exhaust sensor in a predetermined period from starting the internal combustion engine.SELECTED DRAWING: Figure 1
【課題】内燃機関が始動した直後において、暖気不良等による排気浄化触媒の異常を監視する技術を提供する。【解決手段】内燃機関と電動モータを駆動源とするハイブリッド車両の排気浄化システムは、前記内燃機関の排気通路に設けられている排気浄化触媒と、前記排気浄化触媒よりも下流側の前記排気通路に設けられており、窒素酸化物の濃度を測定可能な排気センサと、前記内燃機関が始動してからの所定期間において、前記排気センサで測定された前記窒素酸化物の検出結果に基づいて異常信号を生成するように構成されている異常信号生成部と、を備える。【選択図】図1
EXHAUST EMISSION CONTROL SYSTEM
排気浄化システム
2019-12-26
Patent
Electronic Resource
Japanese
IPC: | F01N GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL , Schalldämpfer oder Auspuffvorrichtungen für Gase von Kraft- und Arbeitsmaschinen oder von Kraftmaschinen allgemein / 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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