Collegiate Design Series
SAE Learning Center
A World in Motion (K-12)
Participate with SAE
Brand Gear Store
Donate to SAE
Buick's 1972 Exhaust Gas Recirculation System
In 1972 models for sale in California, Buick first employed programmed-metered exhaust gas dilution of the engine intake charge as the major means of reducing Oxides of Nitrogen (NOx) emission levels.
With more stringent NOx emission standards applicable nationally to 1973 light duty vehicles, it is probable that similar systems will be more widely used.
The major considerations in the decision to use this means of reducing NOx emissions, the design details of the total system, and the field experience to date is discussed.
The author concludes with some thought on the limit of usefulness of Exhaust Gas Recirculation for NOx reduction, and further refinements needed to approach that limit.
Thompson, A., "Buick's 1972 Exhaust Gas Recirculation System," SAE Technical Paper 720519, 1972,
A. L. Thompson
National Automobile Engineering Meeting
Exhaust gas recirculation (EGR)
Environmental regulations and standards
Subscribers can view annotate, and download all of SAE's content.
Learn More »
Access SAE MOBILUS »
Add to Cart
Members save up to
off list price.
to see discount.
With TechSelect, you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.