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Nonroad Engines, Equipment, and Vehicles

EPA Nonregulatory Nonroad Duty Cycles

This page contains EPA nonregulatory nonroad duty cycles for equipment such as agricultural tractors, backhoe loaders, crawlers tractors, excavators, arc welders, skid steer loaders, and wheeled loaders.  Also, test procedures, laboratory methods, fuels, and emissions for this equipment are extensively described.


Engine Speed and Torque vs Time

(Normalized 0 = idle; 100 = rated/gcs speed/torque)

All Cycles and charts:
Individual Cycles and charts:
Other Test Procedures and Laboratory Methods

This page is maintained by EPA's Office of Transportation and Air Quality (OTAQ).
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