Estimation of Fuel Economy and Emissions for Heavy-duty Diesel Hybrid Vehicle with Electrical Heating Catalyst System

触媒昇温装置搭載ディーゼルハイブリッド重量車の環境性能評価

In order to reduce the emissions of the heavy-duty diesel hybrid vehicles (HEV), it is necessary to provide the high exhaust-gas temperature and to keep aftertreatment system effective. But the engine load of the HEV is assisted by the electric motor. Therefore, the aftertreatment system of these vehicles is not able to get the enough high exhaust-gas temperature. For example, the emission characteristics of the HEV are worsen at the urban driving mode. In this study, the electric heating catalyst system (EHC) for the HEV was equipped. The fuel economy and emission characteristics of this vehicle were estimated. This result is that the EHC showed good performance at the engine low speed and low torque range. And, NOx emission was reduced when the tailpipe layout was setup in order of the urea solution injector, EHC and SCR catalyst. The fuel economy of the HEV with the EHC was slightly decreased, but the emissions were much improved.ディーゼル車両の排出ガスを,排出ガス後処理装置で十分に浄化させるためには,高温の熱エネルギーが必要である.しかし,ハイブリッド重量車は,エンジンの仕事の一部を電動モータで補うことから,高温の熱エネルギを発生しにくく,排出ガスが悪化する.そこで,後処理装置に触媒昇温装置を取付け,環境性能を評価した.

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  • Accession Number: 01673425
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: May 15 2018 3:04PM