['Air Programs']
['Air Emissions']
03/15/2023
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(a) The following duty cycles apply as specified in §1042.505(b)(1):
(1) The following duty cycle applies for discrete-mode testing:
| E3 mode No. | Engine speed 1 | Percent of maximum test power | Weighting factors |
|---|---|---|---|
| 1 | Maximum test speed | 100 | 0.2 |
| 2 | 91% | 75 | 0.5 |
| 3 | 80% | 50 | 0.15 |
| 4 | 63% | 25 | 0.15 |
| 1 Maximum test speed is defined in 40 CFR part 1065. Percent speed values are relative to maximum test speed. | |||
(2) The following duty cycle applies for ramped-modal testing:
| RMC mode | Time in mode (seconds) | Engine speed 1 3 | Power (percent) 2 3 |
|---|---|---|---|
| 1a Steady-state | 229 | Maximum test speed | 100%. |
| 1b Transition | 20 | Linear transition | Linear transition in torque. |
| 2a Steady-state | 166 | 63% | 25%. |
| 2b Transition | 20 | Linear transition | Linear transition in torque. |
| 3a Steady-state | 570 | 91% | 75%. |
| 3b Transition | 20 | Linear transition | Linear transition in torque. |
| 4a Steady-state | 175 | 80% | 50%. |
| 1 Maximum test speed is defined in 40 CFR part 1065. Percent speed is relative to maximum test speed. 2 The percent power is relative to the maximum test power. 3 Advance from one mode to the next within a 20 second transition phase. During the transition phase, command a linear progression from the torque setting of the current mode to the torque setting of the next mode, and simultaneously command a similar linear progression for engine speed if there is a change in speed setting. | |||
(b) The following duty cycles apply as specified in §1042.505(b)(2):
(1) The following duty cycle applies for discrete-mode testing:
| E5 mode No. | Engine speed 1 | Percent of maximum test power | Weighting factors |
|---|---|---|---|
| 1 | Maximum test speed | 100 | 0.08 |
| 2 | 91% | 75 | 0.13 |
| 3 | 80% | 50 | 0.17 |
| 4 | 63% | 25 | 0.32 |
| 5 | Warm idle | 0 | 0.3 |
| 1 Maximum test speed is defined in 40 CFR part 1065. Percent speed values are relative to maximum test speed. | |||
(2) The following duty cycle applies for ramped-modal testing:
| RMC mode | Time in mode (seconds) | Engine speed 1 3 | Power (percent) 2 3 |
|---|---|---|---|
| 1a Steady-state | 167 | Warm idle | 0. |
| 1b Transition | 20 | Linear transition | Linear transition in torque. |
| 2a Steady-state | 85 | Maximum test speed | 100%. |
| 2b Transition | 20 | Linear transition | Linear transition in torque. |
| 3a Steady-state | 354 | 63% | 25%. |
| 3b Transition | 20 | Linear transition | Linear transition in torque. |
| 4a Steady-state | 141 | 91% | 75%. |
| 4b Transition | 20 | Linear transition | Linear transition in torque. |
| 5a Steady-state | 182 | 80% | 50%. |
| 5b Transition | 20 | Linear transition | Linear transition in torque. |
| 6 Steady-state | 171 | Warm idle | 0. |
| 1 Maximum test speed is defined in 40 CFR part 1065. Percent speed is relative to maximum test speed. 2 The percent power is relative to the maximum test power. 3 Advance from one mode to the next within a 20 second transition phase. During the transition phase, command a linear progression from the torque setting of the current mode to the torque setting of the next mode, and simultaneously command a similar linear progression for engine speed if there is a change in speed setting. | |||
(c) The following duty cycles apply as specified in §1042.505(b)(3):
(1) The following duty cycle applies for discrete-mode testing:
| E2 mode No. | Engine speed 1 | Torque (percent) 2 | Weighting factors |
|---|---|---|---|
| 1 | Engine Governed | 100 | 0.2 |
| 2 | Engine Governed | 75 | 0.5 |
| 3 | Engine Governed | 50 | 0.15 |
| 4 | Engine Governed | 25 | 0.15 |
| 1 Speed terms are defined in 40 CFR part 1065. 2 The percent torque is relative to the maximum test torque as defined in 40 CFR part 1065. | |||
(2) The following duty cycle applies for ramped-modal testing:
| RMC mode | Time in mode (seconds) | Engine speed | Torque (percent) 1 2 |
|---|---|---|---|
| 1a Steady-state | 229 | Engine Governed | 100%. |
| 1b Transition | 20 | Engine Governed | Linear transition. |
| 2a Steady-state | 166 | Engine Governed | 25%. |
| 2b Transition | 20 | Engine Governed | Linear transition. |
| 3a Steady-state | 570 | Engine Governed | 75%. |
| 3b Transition | 20 | Engine Governed | Linear transition. |
| 4a Steady-state | 175 | Engine Governed | 50%. |
| 1 The percent torque is relative to the maximum test torque as defined in 40 CFR part 1065. 2 Advance from one mode to the next within a 20 second transition phase. During the transition phase, command a linear progression from the torque setting of the current mode to the torque setting of the next mode. | |||
[81 FR 74156, Oct. 25, 2016]
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