Simon, Antoine (Laboratoire PRISME, Université d'Orléans), Nelson-Gruel, Dominique (University of Orleans), Onori, Simona (Stanford University), Charlet, Alain (Univ. Orléans), JAINE, Thierry (Groupe PSA), Colin, Guillaume (Univ. Orléans), Nouillant, Cédric (PSA Peugeot Citroen), CHAMAILLARD, Yann (University of Orléans)

An Observer Looks at the Temperature in the 3WCC

Scheduled for presentation during the Regular Session "Estimation and Diagnosis: Exhaust Emissions" (WeBT2), Wednesday, June 26, 2019, 16:30−16:50, Chenonceau

9th IFAC International Symposium on Advances in Automotive Control, June 23-27, 2019, Orléans, France

This information is tentative and subject to change. Compiled on April 19, 2024

Abstract

European standards on pollutants have resulted in the systematic integration of a three-way catalytic converter (3WCC) on gasoline engines. The conversion efficiency of the 3WCC is strongly dependent on the temperature of the 3WCC itself. Knowing this temperature is a key element in predicting and minimizing the real quantities of pollutants that the gasoline engine rejects. Due to cost issues, it is really difficult to obtain this information through a direct measurement. This article presents a complete methodology for estimating exhaust gas and catalyst temperature in real time. The first step of this methodology consists of building a 1-dimensional physical model (1D model) of the 3WCC’s temperature. All of the parameters of this model are identified using some experimental data and a particle swarm optimization algorithm. The second step of the proposed methodology consists of using an extended Kalman filter algorithm to estimate all temperatures in real time from a linearized model based on the previous 1D physical model and a measurement downstream of the 3WCC. Every step of this methodology is validated using experimental data.