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Diesel exhaust fluid (DEF; also known as AUS 32 and sometimes marketed as AdBlue [3]) is a liquid used to reduce the amount of air pollution created by a diesel engine. Specifically, DEF is an aqueous urea solution made with 32.5% urea and 67.5% deionized water .
British Rail Class 55 Deltic diesel locomotive with their characteristic dense exhaust when starting a train. Diesel exhaust is the exhaust gas produced by a diesel engine, plus any contained particulates. Its composition may vary with the fuel type, rate of consumption or speed of engine operation (e.g., idling or at speed or under load), and ...
The Cummins ISX also utilized DEF, or diesel exhaust fluid, in later models when EPA requirements changed. DEF is system of injected urea that reduces the emissions of a diesel engine. The Cummins ISX is required to have inhibitors in place for certain failures of the DEF system.
The areas of California with the highest health related risks in exposure to diesel pollution are those that are the most densely populated air basins. Half of California's diesel pollution illnesses occur in the South Coast. 45% of the State's population resides here, and they breathe 30% of particulate matter and nitrogen oxide (NOx).
The Clean Air Act of 1963 (CAA) was passed as an extension of the Air Pollution Control Act of 1955, encouraging the federal government via the United States Public Health Service under the then-Department of Health, Education, and Welfare (HEW) to encourage research and development towards reducing pollution and working with states to establish their own emission reduction programs.
The urea solution is also referred to as diesel exhaust fluid (DEF). Diesel exhaust contains relatively high levels of particulate matter. Catalytic converters remove only 20–40% of PM so particulates are cleaned up by a soot trap or diesel particulate filter (DPF). In the U.S., all on-road light, medium, and heavy-duty diesel-powered ...
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