EPA Nonregulatory Nonroad Duty Cycles
This page has three kinds of files:
- Individual Activity Cycles and Charts – Data collected in the field.
- Process Notes for the Proposed Transient PM (Particulate Matter) Test Cycle - Files addressing various processes designed to convert engine operating data to consistent torque and time measurements. The Cycle is comprised of elements of the individual nonregulatory duty cycles from the following nonroad equipment:
- agricultural tractor
- backhoe loader
- crawler dozer
- excavator
- arc welder
- skid-steer loader
- rubber-tire loader
- EPA’s proposed draft Nonroad Transient PM Duty Cycle - steps in its development are shown in the Excel workbook in its section at the bottom of the page.
Individual Cycles Data and Charts:
| Cycle Type | File Name | Charts |
|---|---|---|
| Agricultural Tractor | Agricultural Tractor Cycle (TXT) (txt) |
|
| Backhoe Loader | Backhoe Loader Cycle (TXT) (txt) |
|
| Crawler-Dozer or Crawler Tractor | Crawler Tractor Cycle (TXT) (txt) |
|
| Excavator | Excavator Cycle (TXT) (txt) |
|
|
Arc Welder |
Arc Welder Typical Operation 1 (TXT) (txt) |
|
| Arc Welder | Arc Welder Typical Operation 2 (TXT) (txt) |
|
|
Arc Welder |
Arc Welder High Speed Transient Operation (TXT) (txt) |
|
| Arc Welder | Arc Welder High Torque Transient Operation (TXT) (txt) |
|
| Skid Steer Loader | Skid Steer Loader Typical Operation 1 (TXT) (txt) |
|
| Skid Steer Loader | Skid Steer Loader Typical Operation 2 (TXT) (txt) |
|
| Skid Steer Loader | Skid Steer Loader High Speed Transient Operation (TXT) (txt) |
|
| Skid Steer Loader | Skid Steer Loader High Torque Transient Operation (TXT) (txt) |
|
|
Wheeled, or Rubber-Tire, Loader |
Wheel Loader Typical Operation (TXT) (txt) |
|
| Wheeled, or Rubber-Tired, Loader | Wheel Loader Typical Operation 2 (TXT) (txt) |
|
| Wheeled, or Rubber-Tired, Loader | Wheel Loader High Speed Transient Operation (TXT) (txt) |
|
| Wheeled, or Rubber-Tired, Loader | Wheel Loader High Torque Transient Operation (TXT) (txt) |
|
Engine Speed and Torque vs Time (Normalized 0 = idle; 100 = rated/governed central speed/torque)
Process Notes for the Proposed Transient PM (particulate matter) Test Cycle
- Maximum Speed Data Point Norm/Denorm Procedure Note (TXT) (txt)
- Max. Speed Raw Data Point Normalization Spreadsheet (xls)
- Max. Speed Cycle Data Point Denormalization Spreadsheet (xls)
- Technical Note Discussing One Form of Control Strategy (TXT) (txt)
EPA’s draft Nonroad Transient PM duty cycle
The Excel workbook listed below shows iterations of the duty cycle in the development of the proposed draft of the Nonroad Transient PM Duty Cycle.