A system for recirculating exhaust gas from an internal combustion engine 2, the system comprising an exhaust conduit 3, a first catalyst 21 disposed in exhaust conduit 3 for treating exhaust gas, an electric heating element 20 for heating air in the exhaust conduit 3 upstream of first catalyst 21, a pumping means for pumping air past the electric heating element 20 to preheat the first catalyst 21, and a recirculation line 14, 24, 38 for recirculating the heated air. The present disclosure also relates to a catalyst preheat control unit 29 and to a method of preheating a first catalyst 21. The system aims overcome the limitations of catalysts having high operating temperatures and that may be preheated.
Catalyst preheat control apparatus and method
02.09.2020
Patent
Elektronische Ressource
Englisch
IPC: | F02D CONTROLLING COMBUSTION ENGINES , Steuern oder Regeln von Brennkraftmaschinen / 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 / 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 |
Europäisches Patentamt | 2019
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