Technical Paper
Research on the Pollutant Reduction Control for P2.5 hybrid electric vehicles
2024-04-09
2024-01-2376
The coordinated emission reduction management strategy of the P2.5 hybrid system is based on the engine torque management, engine speed management, the catalyst heat time control and the motor torque control. For HEV models, in addition to the traditional engine body control method, the following unique methods for HEV models can also be used to control emissions. The main principle is to make the engine work as much as possible in steady state conditions or to control engine emissions by limiting the engine load. The system divides the catalyst heating stage into one stage and two stages. The first stage corresponds to the use of motor to drive the vehicle so that the engine is in idle idling condition. On the one hand, it can stabilize the heating catalyst, and on the other hand, it can avoid the air-fuel ratio shock caused by speed and load fluctuations, which leads to the deterioration of emissions.