Real driving emissions evaluation for a heavy duty vehicle based on engine-in-the-loop methodology

In this paper, the engine-in-the-loop (EIL) methodology was used to study real driving emissions of a heavy-duty vehicle on an engine test bed. The virtual combined with actual establish EIL platform. result speed followability shows that difference between simulated and is within ±2 km/h, indicating cycle can be well reproduced bed by method. method high coincidence operating points. Compared driving, CO2, NOx PN 3.6%, 72.3% 40% lower for vehicle, respectively. Analysis equipment key influencing factor accuracy EIL, while control exhaust temperature intercooler play important roles in EIL.