Click on “Download PDF” for the PDF version or on the title for the HTML version.

If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options.

Regulations are being enacted to control engine emissions from agricultural and industrial equipment in North America, Europe, and other parts of the world. This paper outlines the expected exhaust emission requirements, including limits and test procedures. Current diesel engine technology is reviewed in terms of the emission levels achievable, the fundamentals of emissions formation, the methods of emissions control, and trade-offs between emissions and other performance characteristics. Diesel engines have inherently low carbon monoxide (CO), carbon dioxide (CO2), and hydrocarbon (HC) emissions. The pollutants requiring reduction are nitrous oxide (NOx), particulate matter (PM), and sulfur oxides (SO2). Engine technology options are discussed to meet the requirements for the 1990s. This is compared and contrasted to the on-highway diesel technology experience. Possible new engine technologies to meet requirements beyond the year 2000 also are explored.