A Study of a Wide Range Air-Fuel Ratio Sensor for Exhaust Emission Reduction

Paper #:
  • 930233

Published:
  • 1993-03-01
Citation:
Hunt, F., Yamauchi, T., Ueno, S., and Byers, R., "A Study of a Wide Range Air-Fuel Ratio Sensor for Exhaust Emission Reduction," SAE Technical Paper 930233, 1993, https://doi.org/10.4271/930233.
Pages:
9
Abstract:
Emissions tests were performed to study the operating characteristics of a wide range air/fuel ratio (AFR) sensor in closed loop control. The AFR sensor used here has an output voltage with respect to AFR that is linear and can be characterized by a fourth order polynomial function. For this study the output signal of the AFR sensor was fed into a General Control Unit (GCU). The GCU converted this analog input signal into a square wave similar to a lambda sensor. The output from the GCU was fed into the Engine Control Unit (ECU) of the 3.8L, V6 test engine to control the engine A/F ratio. Emissions tests were conducted in closed loop mode under steady state and transient condition. Emissions of HC, CO and NOx using the AFR sensor will be shown. Results of these tests showed that the AFR sensor allowed for precise control of the AFR at the stoichiometric point (λ = 1.0).
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Training / Education
2018-02-26
Technical Paper / Journal Article
2010-10-25