Comparison of AFR Calculation Methods Using Gas Analysis and Mass Flow Measurement

971013

02/24/1997

Event
International Congress & Exposition
Authors Abstract
Content
The various methods for calculating AFR from exhaust gas analysis do not always produce identical results. This paper presents exhaust gas analysis data from a four-stroke SI engine burning two different fuels - unleaded gasoline and LPG. Exhaust gas concentrations are measured both upstream and downstream of the three-way catalyst. All four sets of data are analysed using established algorithms due to Spindt, Urban, Uyehara and Fukui. The results of each algorithm are compared with the AFR obtained using direct measurement of air and fuel mass flows.
Meta TagsDetails
DOI
https://doi.org/10.4271/971013
Pages
13
Citation
Lynch, D., and Smith, W., "Comparison of AFR Calculation Methods Using Gas Analysis and Mass Flow Measurement," SAE Technical Paper 971013, 1997, https://doi.org/10.4271/971013.
Additional Details
Publisher
Published
Feb 24, 1997
Product Code
971013
Content Type
Technical Paper
Language
English