Abstract:

It was explored how to determine the engine conditions that meet the control requirements of temperatures, air fuel ratios and so on in the standard of GB18352.6-2016 using an experimental engine. The  experimental scheme meeting standard bench cycle (SBC) was proposed, based on the investigation to the SBC cycle used in the rapid aging of the catalytic converter. Through the experiments carried out in the steady state catalytic converter temperature field, the influence of different factors on the temperature of catalyst was studied, such as the air-fuel ratio, ignition advance angle, air injection and etc. The results show that the working mode of the catalytic converter prototype that satisfies the temperature of 800 ℃ distributes in the strip area of 2 000 r/min high load to 3 800 r/min low load. Compared with the ignition time, air-fuel ratio and air injection affect the converter temperature more obviously. Different cycle options can be selected through cyclic consistency, aging time, and transition time.

Key words: pollutant control device, three way catalytic converter, standard bench cycle (SBC), rapid aging