Title :
Dynamic modeling of a lean NOx trap for lean burn engine control
Author :
Wang, Yanying ; Raman, S. ; Grizzle, Jessy W.
Author_Institution :
Sci. Res. Lab., Ford Motor Co., Dearborn, MI, USA
Abstract :
A control oriented dynamic model of the lean NOx trap (LNT) behavior has been developed in SIMULINKTM. The model simulates the trapping and purging phenomena and includes the important parameters which affect the LNT behavior. These include the trap temperature, trapping and purging duration, air/fuel ratios and the mass flow rates of the exhaust gases. Engine dynamometer test data have been used to identify the model parameters and to validate the model structure. There is good agreement between the simulation results and test data. The model is suitable for control and fuel/emission tradeoff analysis
Keywords :
chemical variables control; digital simulation; internal combustion engines; SIMULINK; air/fuel ratios; control oriented dynamic model; dynamic modeling; exhaust gases; fuel/emission tradeoff analysis; lean NOx trap; lean burn engine control; mass flow rates; model structure; purging; trap temperature; trapping; Barium; Combustion; Engines; Frequency; Fuel economy; Fuel storage; Hydrogen; Nitrogen; Platinum; Temperature;
Conference_Titel :
American Control Conference, 1999. Proceedings of the 1999
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-4990-3
DOI :
10.1109/ACC.1999.783232
