Browse Publications Technical Papers 2001-01-1955
2001-05-07

Determination of the Air/Fuel Ratio of a SI Engine During Transients With a Standard UEGO Sensor 2001-01-1955

Detailed investigations on wall film behavior in port injected SI engines show that a standard UEGO sensor leads to inaccurate results during transients concerning the real air/fuel ratio. Purpose of this paper is to identify the reasons for this behavior and developing a compensation strategy. Fuelling transients due to steps in the injection period at constant engine speed and MAP with modified sensors were carried out and the influence of the protective tube and the dynamic behavior of the measuring cell were found to be the essential parameters. The standard UEGO sensor can be used to determine the air/fuel ratio during transients, if the reasons for inaccurate results presented in this paper are considered.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 43% off list price.
Login to see discount.
Special Offer: With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
X