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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.
Contact: ASD Information Line, phone: (734) 214-4636 or email: asdinfo@epa.gov
Engine Speed and Torque vs Time
(Normalized 0 = idle; 100 = rated/gcs speed/torque)
All Cycles and charts:
- Excel 5.0 Workbook 1.6M XLS
- Adobe Acrobat (PDF) (1.0MB, about PDF files)
- Proposed Transient PM Test Cycle (posted 9/29/00)
- Maximum Speed Data Point Norm/Denorm Procedure Note 5K TXT or 8K WPD
- Max. Speed Raw Data Point Normalization Spreadsheet 3.2M MS-Excel 7
- Max. Speed Cycle Data Point Denormalization Spreadsheet 3.3M MS-Excel 7
- Technical Note Discussing One Form of Control Strategy 6K TXT or 8K WPD
Individual Cycles and charts:
- Agricultural Tractor Cycle 18K TXT or Chart 14K GIF
- Backhoe Loader Cycle 16K TXT or Chart 23K GIF
- Crawler Tractor Cycle 24K TXT or Chart 30K GIF
- Excavator Cycle 35K TXT or Chart 22K GIF
- Arc Welder Cycles
- Arc Welder Typical Operation 1 35K TXT or Chart 21K GIF
- Arc Welder Typical Operation 2 50K TXT or Chart 21K GIF
- Arc Welder High Speed Transient Operation 35K TXT or Chart 29K GIF
- Arc Welder High Torque Transient Operation 13K TXT or Chart 8.4K GIF
- Skid Steer Loader Cycles
- Skid Steer Loader Typical Operation 1 35K TXT or Chart 30K GIF
- Skid Steer Loader Typical Operation 2 35K TXT or Chart 23K GIF
- Skid Steer Loader High Speed Transient Operation 35K TXT or Chart 28K GIF
- Skid Steer Loader High Torque Transient Operation 32K TXT or [Chart 30K GIF
- Wheel Loader Cycles
- Wheel Loader Typical Operation 1 35K TXT or Chart 40K GIF
- Wheel Loader Typical Operation 2 35K TXT or Chart 40K GIF
- Wheel Loader High Speed Transient Operation 35K TXT or Chart 55K GIF
- Wheel Loader High Torque Transient Operation 35K TXT or Chart 57K GIF
