40 CFR Appendix A to Subpart D of Part 89
Tables
June 9, 2020
Table 1—Abbreviations Used in Subpart D
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| CLD | Chemiluminescent detector. |
| CO | Carbon monoxide. |
| CO2 | Carbon dioxide. |
| HC | Hydrocarbons. |
| HCLD | Heated chemiluminescent detector. |
| HFID | Heated flame ionization detector. |
| GC | Gas chromatograph. |
| NDIR | Non-dispersive infra-red analyzer. |
| NIST | National Institute for Standards and Testing. |
| NO | Nitric Oxide. |
| NO2 | Nitrogen Dioxide. |
| NOX | Oxides of nitrogen. |
| O2 | Oxygen. |
Table 2—Symbols Used in Subparts D and E
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| Symbol | Term | Unit |
|---|---|---|
| conc | Concentration (ppm by volume) | ppm |
| f | Engine specific parameter considering atmospheric conditions | |
| FFCB | Fuel specific factor for the carbon balance calculation | |
| FFD | Fuel specific factor for exhaust flow calculation on dry basis | |
| FFH | Fuel specific factor representing the hydrogen to carbon ratio | |
| FFW | Fuel specific factor for exhaust flow calculation on wet basis | |
| FR | Rate of fuel consumed | g/h |
| GAIRW | Intake air mass flow rate on wet basis | kg/h |
| GAIRD | Intake air mass flow rate on dry basis | kg/h |
| GEXHW | Exhaust gas mass flow rate on wet basis | kg/h |
| GFuel | Fuel mass flow rate | kg/h |
| H | Absolute humidity (water content related to dry air) | g/kg |
| i | Subscript denoting an individual mode | |
| KH | Humidity correction factor | |
| L | Percent torque related to maximum torque for the test mode | % |
| mass | Pollutant mass flow | g/h |
| nd, i | Engine speed (average at the i'th mode during the cycle) | 1/min |
| Ps | Dry atmospheric pressure | kPa |
| Pd | Test ambient saturation vapor pressure at ambient temperature | kPa |
| P | Observed brake power output uncorrected | kW |
| PAUX | Declared total power absorbed by auxiliaries fitted for the test | kW |
| PM | Maximum power measured at the test speed under test conditions | kW |
| Pi | Pi = PM, i + PAUX, i | |
| PB | Total barometric pressure (average of the pre-test and post-test values) | kPa |
| Pv | Saturation pressure at dew point temperature | kPa |
| Ra | Relative humidity of the ambient air | % |
| S | Dynamometer setting | kW |
| T | Absolute temperature at air inlet | K |
| Tbe | Air temperature after the charge air cooler (if applicable) (average) | K |
| Tclout | Coolant temperature outlet (average) | K |
| TDd | Absolute dewpoint temperature | K |
| Td, i | Torque (average at the i'th mode during the cycle) | N-m |
| TSC | Temperature of the intercooled air | K |
| Tref | Reference temperature | K |
| VEXHD | Exhaust gas volume flow rate on dry basis | m3/h |
| VAIRW | Intake air volume flow rate on wet basis | m3/h |
| PB | Total barometric pressure | kPa |
| VEXHW | Exhaust gas volume flow rate on wet basis | m3/h |
| WF | Weighing factor | |
| WFE | Effective weighing factor |
Table 3—Measurement Accuracy and Calibration Frequency
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| No. | Item | Calibration accuracy1 | Calibration frequency |
|---|---|---|---|
| 1 | Engine speed | ±2% | 30 days. |
| 2 | Torque | Larger of ±2% of point or ±1% of engine maximum | 30 days. |
| 3 | Fuel consumption (raw measurement) | ±2% of engine maximum | 30 days. |
| 4 | Air consumption (raw measurement) | ±2% of engine maximum | As required. |
| 5 | Coolant temperature | ±2 °K | As required. |
| 6 | Lubricant temperature | ±2 °K | As required. |
| 7 | Exhaust backpressure | ±1.0% of engine maximum | As required. |
| 8 | Inlet depression | 1.0% of engine maximum | As required. |
| 9 | Exhaust gas temperature | ±15 °K | As required. |
| 10 | Air inlet temperature (combustion air) | ±2 °K | As required. |
| 11 | Atmospheric pressure | ±0.5% | As required. |
| 12 | Humidity (combustion air) (g of H2O/Kg of dry air) | ±0.5 | As required. |
| 13 | Fuel temperature | ±2 °K | As required. |
| 14 | Temperature with regard to dilution tunnel | ±2 °K | As required. |
| 15 | Dilution air humidity (g of H2O/Kg of dry air) | ±0.5 | As required. |
| 16 | HC analyzer | ±2% | Monthly or as required. |
| 17 | CO analyzer | ±2% | Once per 60 days or as required. |
| 18 | NOX analyzer | ±2% | Monthly or as required. |
| 19 | Methane analyzer | ±2% | Monthly or as required. |
| 20 | NOX converter efficiency check | 90% | Monthly. |
| 21 | CO2 analyzer | ±2% | Once per 60 days or as required. |
1All accuracy requirements pertain to the final recorded value which is inclusive of the data acquisition system.
Table 4—Federal Test Fuel Specifications
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| Item | Procedure (ASTM)1 | Value (type 2-D) |
|---|---|---|
| Cetane | D613-95 | 40-48 |
| Distillation Range: | ||
| IBP, °C | D86-97 | 171-204 |
| 10% point, °C | 86-97 | 204-238 |
| 50% point, °C | 86-97 | 243-282 |
| 90% point, °C | 86-97 | 293-332 |
| EP, °C | 86-97 | 321-366 |
| Gravity, API | D287-92 | 32-37 |
| Total Sulfur, %mass | D129-95 or D2622-98 | 0.03-0.40 |
| Hydrocarbon composition: | ||
| Aromatics, %vol | D1319-98 or D5186-96 | 210 |
| Paraffins, Naphthenes, Olefins | D1319-98 | (3) |
| Flash Point, °C (minimum) | D93-09 | 54 |
| Viscosity @ 38 °C, centistokes | D445-09 | 2.0-3.2 |
1All ASTM procedures in this table have been incorporated by reference. See §89.6.
2Minimum.
3Remainder.
[63 FR 57013, Oct. 23, 1998, as amended at 77 FR 2461, Jan. 18, 2012]
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