This page has three kinds of files:

1. Individual Activity Cycles and Charts  – Data collected in the field.
2. 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
3. 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)(18 K)	Click me to see the enlarged image.
Backhoe Loader	Backhoe Loader Cycle (TXT)(17 K)	Click me to see the enlarged image.
Crawler-Dozer or Crawler Tractor	Crawler Tractor Cycle (TXT)(24 K)	Click me to see the enlarged image.
Excavator	Excavator Cycle (TXT)(35 K)	Click me to see the enlarged image.
Arc Welder	Arc Welder Typical Operation 1 (TXT)(35 K)	Click me to see the enlarged image.
Arc Welder	Arc Welder Typical Operation 2 (TXT)(49 K)	Click me to see the enlarged image.
Arc Welder	Arc Welder High Speed Transient Operation (TXT)(35 K)	Click me to see the enlarged image.
Arc Welder	Arc Welder High Torque Transient Operation (TXT)(13 K)	Click me to see the enlarged image.
Skid Steer Loader	Skid Steer Loader Typical Operation 1 (TXT)(35 K)	Click me to see the enlarged image.
Skid Steer Loader	Skid Steer Loader Typical Operation 2 (TXT)(35 K)	Click me to see the enlarged image.
Skid Steer Loader	Skid Steer Loader High Speed Transient Operation (TXT)(35 K)	Click me to see the enlarged image.
Skid Steer Loader	Skid Steer Loader High Torque Transient Operation (TXT)(33 K)	Click me to see the enlarged image.
Wheeled, or Rubber-Tire, Loader	Wheel Loader Typical Operation (TXT)(35 K)	Click me to see the enlarged image.
Wheeled, or Rubber-Tired, Loader	Wheel Loader Typical Operation 2 (TXT)(35 K)	Click me to see the enlarged image.
Wheeled, or Rubber-Tired, Loader	Wheel Loader High Speed Transient Operation (TXT)(35 K)	Click me to see the enlarged image.
Wheeled, or Rubber-Tired, Loader	Wheel Loader High Torque Transient Operation (TXT)(33 K)	Click me to see the enlarged image.

Engine Speed and Torque vs Time (Normalized 0 = idle; 100 = rated/governed central speed/torque) 

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Process Notes for the Proposed Transient PM (particulate matter) Test Cycle

Free Viewers

• Maximum Speed Data Point Norm/Denorm Procedure Note (TXT)(5 K)
• Max. Speed Raw Data Point Normalization Spreadsheet (Excel)(3 MB)
• Max. Speed Cycle Data Point Denormalization Spreadsheet (Excel)(3 MB)
• Technical Note Discussing One Form of Control Strategy (TXT)(6 K)

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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.

Excel 5.0 Workbook (Excel)(2 MB)  | | Excel 5.0 Workbook in PDF format, please see the bottom of this page.

• Excel 5.0 Workbook (PDF)(352 pp, 782 K, August 1999)