Code of Federal Regulations Title 40. Protection of Environment 40 CFR Pt. 90, Subpt. D, App. A Appendix A to Subpart D of Part 90—Tables

CO

Carbon monoxide

CO₂

Carbon dioxide

NO

Nitric oxide

NO₂

Nitrogen dioxide

NO_X

Oxides of nitrogen

O₂

Oxygen

conc

Concentration (ppm by volume)

ppm

f

Engine specific parameter considering atmospheric conditions

F_FCB

Fuel specific factor for the carbon balance calculation

F_FD

Fuel specific factor for exhaust flow calculation on dry basis

F_FH

Fuel specific factor representing the hydrogen to carbon ratio

F_FW

Fuel specific factor for exhaust flow calculation on wet basis

G_AIRW

Intake air mass flow rate on wet basis

kg/h

G_AIRD

Intake air mass flow rate on dry basis

kg/h

G_EXHW

Exhaust gas mass flow rate on wet basis

kg/h

G_Fuel

Fuel mass flow rate

kg/h

H

Absolute humidity (water content related to dry air)

gr/kg

i

Subscript denoting an individual mode

K_H

Humidity correction factor

L

Percent torque related to maximum torque for the test mode

percent

mass

Pollutant mass flow

g/h

n_d,i

Engine speed (average at the i'th mode during the cycle)

1/min

P_s

Dry atmospheric pressure

kPa

P_d

Test ambient saturation vapor pressure at ambient temperature

kPa

P

Gross power output uncorrected

kW

P_AUX

Declared total power absorbed by auxiliaries fitted for the test

kW

P_M

Maximum power measured at the test speed under test conditions

kW

P_i

P_i = P_M,i + P_{AUX, i}

P_B

Total barometric pressure (average of the pre-test and post-test values)

kPa

R_a

Relative humidity of the ambient air

percent

T

Absolute temperature at air inlet

C

T_be

Air temperature after the charge air cooler (if applicable) (average)

C

T_clout

Coolant temperature outlet (average)

C

T_Dd

Absolute dew point temperature

C

T_d,i

Torque (average at the i'th mode during the cycle)

N-m

T_SC

Temperature of the intercooled air

C

T_ref

Reference temperature

C

V_EXHD

Exhaust gas volume flow rate on dry basis

m³/h

V_AIRW

Intake air volume flow rate on wet basis

m³/h

P_B

Total barometric pressure

kPa

V_EXHW

Exhaust gas volume flow rate on wet basis

m³/h

WF

Weighing factor

WF_E

Effective weighing factor

1

Engine speed

±2%

Same

Monthly or within one month prior to the certification test.

2

Torque

±2%

Monthly or within one month prior to the certification test.

3

Fuel consumption

±2%

±5%

Monthly or within one month prior to the certification test.

4

Air consumption

±2%

±5%

As required.

5

Coolant temperature

±2 °C

Same

As required.

6

Lubricant temperature

±2 °C

Same

As required.

7

Exhaust back pressure

±5%

Same

As required.

8

Inlet depression

±5%

Same

As required.

9

Exhaust gas temperature

±15 °C

Same

As required.

10

Air inlet temperature (combustion air)

±2 °C

Same

As required.

11

Atmospheric pressure

±0.5%

Same

As required.

12

Humidity (combustion air) (relative)

±3.0 %

Same

As required.

13

Fuel temperature

±2degrees C

Same

As required.

14

Temperature with regard to dilution system

±2 °C

Same

As required.

15

Dilution air humidity

±3% absolute

Same

As required.

16

HC analyzer

±2%^aa

Same

Monthly or within one month prior to the certification test.

17

CO analyzer

±2%^aa

Same

Monthly or within one month prior to the certification test.

18

NO_X analyzer

±2%^aa

Same

Monthly or within one month prior to the certification test.

19

NO_X converter check

90 %

Same

Monthly or within one month prior to the certification test.

20

CO₂ analyzer

±2%^aa

Same

Monthly or within one month prior to the certification test.

Sulfur, ppm max.

339

D 2622–92

Benzene, max. %

1.5

D 3606–92

RVP, psi

8.7

±0.2

D 5191–93a

Octane, R+M/2

87.3

±0.5

D 2699–92

D 2700–92

IBP, °C

32.8

±11.0

D 86–93

10 % point, °C

53.3

±5.5

D 86–93

50 % point, °C

103.3

±5.5

D 86–93

90 % point, °C

165.6

±5.5

D 86–93

End Point, max. °C

212.8

D 86–93

Phosphorus, g/liter, max.

0.02

D 3231–89

Lead, g/liter, max.

0.02

Manganese, g/liter, max.

0.004

Aromatics, %

32.0

±4.0

D 1319–89

Olefins, %

9.2

±4.0

D 1319–89

Saturates, %

Remainder

D 1319–89