Abstract
An integrated Computer Aided Engineering (CAE) Methodology assisting the design of SI-engine exhaust aftertreatment systems is presented in this paper, employing the following computational tools: (i) a computer code which models transient exhaust system heat transfer, (ii) a tuneable computer code which models the transient operation of a three-way catalytic converter, (iii) a database containing chemical kinetics data for a variety of catalyst formulations, and (iv) a methodology for ageing assessment calculations. Application of the CAE methodology, which aids the exhaust aftertreatment system design engineer to meet the oncoming, increasingly stringent emissions standards, is highlighted by referring to a number of representative case studies.