To operate an internal combustion engine regardless quantity of a remaining reductant when purifying exhaust air by means of a catalyst utilizing the reductant.SOLUTION: A hybrid system comprises: an internal combustion engine; an exhaust passage; a generator which generates electric power by utilizing motive force of the internal combustion engine; a power storage device which is charged with the electric power generated by the generator; a vehicle driving motor which is driven by discharged electric power of the power storage device and the electric power generated by the generator;a supply device which is disposed at an upstream side of the first catalyst in the exhaust passage and supplies the reductant; a first catalyst which is disposed in the exhaust passage and purifies a nitride oxide in exhaust air by utilizing the reductant; a second catalyst which is disposed in the exhaust passage, is activated at a higher temperature than an activation temperature of the first catalyst and purifies the nitride oxide in the exhaust air; and a control device which controls an operational state of the internal combustion engine. The second catalyst is heated by the exhaust air. In a case where quantity of a remaining reductant is less than predetermined quantity, the control device operates the internal combustion engine so as to provide, as a control object, an exhaust temperature at which the second catalyst is activated at all the time when operating the internal combustion engine (S122).SELECTED DRAWING: Figure 2
【課題】還元剤を利用する触媒で排気を浄化する場合に還元剤の残量に関わらず内燃機関を運転すること。【解決手段】ハイブリッドシステムは、内燃機関と、排気通路と、内燃機関の動力を利用して発電を行なう発電機と、発電機の発電電力を充電する蓄電装置と、蓄電装置の放電電力および発電機の発電電力で駆動される車両駆動用の電動機と、排気通路に配置され還元剤を利用して排気中の窒素酸化物を浄化する第1触媒と、排気通路の第1触媒の上流側に配置され還元剤を供給する供給装置と、排気通路に配置され第1触媒の活性化温度よりも高い温度で活性化し排気中の窒素酸化物を浄化する第2触媒と、内燃機関の運転状態を制御する制御装置とを備える。第2触媒は、排気によって温められる。制御装置は、還元剤の残量が所定量に満たない場合、内燃機関の運転時には常に第2触媒が活性化する排気温度となることを制御目標として内燃機関を運転する(S122)。【選択図】図2
HYBRID SYSTEM, CONTROL DEVICE FOR HYBRID SYSTEM, AND CONTROL METHOD FOR HYBRID SYSTEM
ハイブリッドシステム、ハイブリッドシステムの制御装置、および、ハイブリッドシステムの制御方法
2020-04-23
Patent
Elektronische Ressource
Japanisch
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 / F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen |
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