PROBLEM TO BE SOLVED: To suppress progress of sulfur poisoning of an exhaust gas purification catalyst in an exhaust emission control system for a hybrid vehicle.SOLUTION: An exhaust emission control system includes an exhaust gas purification catalyst arranged in an exhaust passage of an internal combustion engine, and a control device for controlling driving of the internal combustion engine and an electric motor, and the control device performs sulfur removing control for removing sulfur oxide from the exhaust gas purification catalyst by controlling at least one of driving of the internal combustion engine and an air-fuel ratio in the exhaust passage when the sulfur oxide SOx adsorbed on the exhaust purification catalyst exceeds a prescribed amount. When the sulfur oxide adsorbed on the exhaust purification catalyst exceeds the prescribed amount C1, a start threshold Pon1 of a load for starting the internal combustion engine is set to be higher than in the case where the sulfur oxide adsorbed on the exhaust purification catalyst is equal to or less than the prescribed amount C1.SELECTED DRAWING: Figure 2
【課題】ハイブリッド車両の排気浄化制御システムにおいて、排気浄化触媒の硫黄被毒の進行を抑制することである。【解決手段】排気浄化制御システムは、内燃機関の排気通路に配置された排気浄化触媒と、内燃機関及び電動モータの駆動を制御する制御装置とを含み、制御装置は内燃機関の駆動と排気通路内の空燃比との少なくとも一方を制御することで、排気浄化触媒に吸着した硫黄酸化物SOxが所定量を上回る場合に排気浄化触媒から硫黄酸化物を除去する硫黄除去制御を行う。排気浄化触媒に吸着した硫黄酸化物が所定量C1を上回る場合には、排気浄化触媒に吸着した硫黄酸化物が所定量C1以下の場合に比べて内燃機関を始動する、負荷についての始動閾値Pon1を高く設定する。【選択図】図2
EXHAUST EMISSION CONTROL SYSTEM FOR HYBRID VEHICLE
ハイブリッド車両の排気浄化制御システム
2016-07-21
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 / B01D SEPARATION , Trennen / 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 / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen |