Although the control of nitrogen oxides from automobile exhaust is not yet required by law, several methods have been investigated to determine how much control is possible and what penalties result. These methods involved spark timing, carburetion, and exhaust recirculation. On one test car, a control system was developed which reduced nitrogen oxides 74% while maintaining hydrocarbon and carbon monoxide control at current (1968) federal levels. However, a 13% loss in fuel economy was incurred, and driveability problems were observed. Application to other car models, deposit accumulation, durability, and performance under extreme weather conditions are all open questions at this time.
Reduction of Nitrogen Oxides in Automobile Exhaust
Sae Technical Papers
1969 International Automotive Engineering Congress and Exposition ; 1969
1969-02-01
Conference paper
English
Reduction of nitrogen oxides in exhaust emissions
AIAA | 1993
|Catalytic Reduction of Nitrogen Oxides in Diesel Exhaust Gas
British Library Conference Proceedings | 1995
|Heat Capacity Changes Predict Nitrogen Oxides Reduction by Exhaust Gas Recirculation
SAE Technical Papers | 1971
|Reduction of Nitrogen Oxides in Methanol Diesel Engine Exhaust with Alumina Catalyst
British Library Online Contents | 1995
|Reduction of nitrogen oxides in engine exhaust gases by the addition of cyanuric acid
Automotive engineering | 1988
|