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The Determination of Air/Fuel Ratio Differences Between Cylinders in a Production Engine Using Exhaust Gas Oxygen Sensors
Technical Paper
1999-01-1170
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
Cylinder air/fuel ratio distribution is an important factor affecting the economy, power, vibration, and emissions of an internal combustion engine. Currently, production automobiles utilize an exhaust gas sensor located in the main exhaust stream in order to regulate air/fuel mixtures. By measuring the oxygen content of the exhaust gas for each cylinder independently, the degree of air/fuel variation between cylinders can be determined. This information can be used to determine the mixture quality of specific cylinders. Knowing these variances can lead to design changes in the intake and exhaust manifolds as well as better control of fuel metering which will improve the output of the engine.
This study was carried out using a 1991 3.8L Buick V-6 engine with customized exhaust manifolds utilizing exhaust gas oxygen sensors for each cylinder in addition to the sensor located in the main combined exhaust gas stream. Production level, ZrO2 sensors were used for this experimental study.
This paper details the experimental setup, and the results of this study. It demonstrates an effective and economical means of determining cylinder variations in air/fuel mixture.
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Citation
Davis, G., Ego, A., Baumbach, S., Jordan, C. et al., "The Determination of Air/Fuel Ratio Differences Between Cylinders in a Production Engine Using Exhaust Gas Oxygen Sensors," SAE Technical Paper 1999-01-1170, 1999, https://doi.org/10.4271/1999-01-1170.Also In
Electronic Engine Controls 1999: Sensors, Actuators, and Development Tools
Number: SP-1418; Published: 1999-03-01
Number: SP-1418; Published: 1999-03-01
References
- Young, C. T. Bode, J. D. “Characteristics of ZrO2-Type Oxygen Sensors for Automotive Applications,” SAE Paper 790143 1979
- “Automotive Electric/Electronic Systems,” Bosch 2nd 1995
- Hamann, E. et al “Lambda-Sensor with Y2O3-Stabilized ZrO2-Ceramic for Application in Automotive Emission Control Systems,” SAE Paper 770401 1977