Research on the adaptability of vehicles with different technical types to the China 6 regulation standard 2019-01-0759
A test fleet formed of 47 gasoline vehicles with 6 different technical types was organized, and the adaptability of these vehicles under China 6 standard was studied. By analyzing the performance of the vehicles tested in laboratory and in real-world, the technical types that could simultaneously reconcile emission and fuel consumption performance were proposed. The results show that all vehicles are well performed under laboratory conditions, but in real-world conditions, 50% direct injection vehicles without GPF would fail the RDE test. Better performance occurred in vehicles equipped with GPF, all of which passed the RDE tests even if the conformity factor decreased from 2.1 to 1. In addition, it is found that the fuel consumption of the DI vehicle were lower than that of the PFI vehicle, and the DI vehicle with GPF shows better performance on the balance of emission and fuel consumption, which have more potentials to deal with the increasing tightened emission and fuel consumption standards at the same time.