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e-CFR data is current as of December 2, 2020

Title 40Chapter ISubchapter CPart 90Subpart E → Appendix


Title 40: Protection of Environment
PART 90—CONTROL OF EMISSIONS FROM NONROAD SPARK-IGNITION ENGINES AT OR BELOW 19 KILOWATTS
Subpart E—Gaseous Exhaust Test Procedures


Appendix A to Subpart E of Part 90—Tables

Table 1—Parameters to be Measured or Calculated and Recorded

Parameter Units
Airflow rate (dry), if applicableg/h
Fuel flow rateg/h
Engine Speedrpm
Engine Torque OutputN m
Power OutputkW
Air inlet temperature°C
Air humiditymg/kg
Coolant temperature (liquid cooled)°C
Exhaust mixing chamber surface temperature, if applicable°C
Exhaust sample line temperature, if applicable°C
Total Accumulated hours of Engine Operationh
Barometric PressurekPa

Table 2—Test Cycles for Class I-A, I-B, and Class I-V Engines

Mode Speed1234567891011
   Rated SpeedIntermediate SpeedIdle
Mode Points—A Cycle123456
Load Percent—A Cycle100755025100
Weighting9%20%29%30%7%5%
Mode Points—B Cycle123456
Load Percent—B Cycle100755025100
Weighting9%20%29%30%7%5%
Mode Points—C Cycle12
Load Percent—C Cycle1000
Weighting for Phase 1 Engines90%10%
Weighting for Phase 2 Engines85%15%

[60 FR 34598, July 3, 1995, as amended at 65 FR 24313, Apr. 25, 2000]

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