['Air Programs']
['Air Emissions']
05/13/2024
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(a) Test handheld engines with the following steady-state duty cycle:
| G3 mode No. | Engine speed a | Torque (percent) b | Weighting factors |
|---|---|---|---|
| 1 | Rated speed | 100 | 0.85 |
| 2 | Warm idle | 0 | 0.15 |
| a Test engines at the specified speeds as described in 1054.505. | |||
| b Test engines at 100 percent torque by setting operator demand to maximum. Control torque during idle at its warm idle speed as described in 40 CFR 1065.510. | |||
(b) Test nonhandheld engines with one of the following steady-state duty cycles:
(1) The following duty cycle applies for engines designed to idle:
| G2 Mode No. a | Torque (percent) b | Weighting factors |
|---|---|---|
| 1 | 100 | 0.09 |
| 2 | 75 | 0.20 |
| 3 | 50 | 0.29 |
| 4 | 25 | 0.30 |
| 5 | 10 | 0.07 |
| 6 | 0 | 0.05 |
| a Control engine speed as described in 1054.505. Control engine speed for Mode 6 as described in 1054.505(c) for idle operation. | ||
| b The percent torque is relative to the value established for full-load torque, as described in 1054.505. | ||
(2) The following duty cycle applies for engines that are not designed to idle:
| Mode No. a | Torque (percent) b | Weighting factors |
|---|---|---|
| 1 | 100 | 0.09 |
| 2 | 75 | 0.21 |
| 3 | 50 | 0.31 |
| 4 | 25 | 0.32 |
| 5 | 10 | 0.07 |
| a Control engine speed as described in 1054.505. | ||
| b The percent torque is relative to the value established for full-load torque, as described in 1054.505. | ||
[86 FR 34527, Jun. 29, 2021; 88 FR 4668, Jan. 24, 2023]
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