Abstract
In order to reduce the emissions of the heavy-duty diesel plug-in hybrid vehicles (PHEV), it is necessary to provide the high exhaust-gas temperature and to keep the aftertreatment system effective. The engine starting condition of PHEV is cold, and the engine start and stop is repeated. Therefore, the warm-up of the exhaust-gas aftertreatment system for PHEV takes longer time. So, it may cause negative effects on the emission characteristics of PHEV. In this study, we focused on the electrically heated catalyst system (EHC), which is one of the next generation electrical technologies. This test PHEV was equipped with EHC. The fuel economy and emission characteristics of this test PHEV were estimated using the extended-HILS. This result was that NOx and CO2 emission of this test PHEV which was equipped with EHC was good, compared with the heavy-duty diesel vehicle, the heavy-duty diesel hybrid vehicle and conventional PHEV which was not equipped with EHC.
