Study for monitoring Three-Way Catalyst Converter efficiency based on BP ANN and exotherm

This paper analyzes the traditional mathematical models about monitoring TWCC. Combining with the catalysis exothermic reaction, BP ANN is introduced to develop the TWCC efficiency monitoring model to evaluate the performance of TWCC, which is based on the nonlinear relationship between TWCC efficiency and some input parameters that can be measured on the rebuilt engine test bench. The BP ANN model´s capacity of learning and prolongation is validated. The results show that the established model can forecast the level of TWCC efficiency without traditional mathematics model. So, the BP ANN offers a new way to monitor TWCC.