ONE DIMENSIONAL THREE WAY CATALYST MODEL FOR CONTROL AND DIAGNOSTICS

摘要

A method comprising adjusting a fuel injection amount based on a fractional oxidation state of a catalyst, the fractional oxidation state based on reaction rates of grouped oxidant and reductant exhaust gas species throughout a catalyst and a low-dimensional physics-based model derived from a detailed two-dimensional model to obtain a one-dimensional model averaged over time and space that accounts for diffusion limitations in the washcoat and accurately predicts emissions during cold start.

主权项

1. An engine exhaust method, comprising:
adjusting a fuel injection amount based on a fractional oxidation state of a catalyst, the fractional oxidation state based on reaction rates of two or fewer groupings of exhaust gas species throughout a catalyst and a one-dimensional model averaged over space and time mass balance and energy balance equations for a fluid phase and a washcoat of the catalyst.