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Closed-Loop Exhaust Emission Control System with Electronic Fuel Injection
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English
Abstract
The Federal Standards pertaining to the exhaust emission control of the 1976 model year automobiles presumably demand the catalytic conversion of the pollutants involved. Provided the air-fuel ratio is maintained at a stoichiometric value, some problems (for instance, fuel economy) can be solved. A closed-loop system was developed, consisting of an electronic fuel injection system and a special oxygen sensor, called the λ-sensor, in the exhaust manifold.
First results on vehicles indicate that this control system offers an promising solution to the reduction of harmful contaminants. The closed-loop system can be used with a three-way catalytic converter or with a dual-bed system. It has not yet been investigated whether the durability of the two systems is adequate, apart from the general problems of the durability of each catalyst.
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Citation
Zechnall, R., Baumann, G., and Eisele, H., "Closed-Loop Exhaust Emission Control System with Electronic Fuel Injection," SAE Technical Paper 730566, 1973, https://doi.org/10.4271/730566.Also In
References
- Obländer K. Abthoff J. 33 May 1972 210ff
- Scholl H. Symposium on Automotive Electrical Equipment IME London C 61 September 1972 1ff