Use the following special provisions for testing snowmobiles:
Table 1 of § 1051.505-5 -Mode Duty Cycle for Snowmobiles
Mode No. | Speed (percent)1 | Torque (percent)2 | Minimum time in mode (minutes) | Weighting factors |
1 | 100 | 100 | 3.0 | 0.12 |
2 | 85 | 51 | 3.0 | 0.27 |
3 | 75 | 33 | 3.0 | 0.25 |
4 | 65 | 19 | 3.0 | 0.31 |
5 | Idle | 0 | 3.0 | 0.05 |
1 Percent speed is percent of maximum test speed.
2 Percent torque is percent of maximum torque at maximum test speed.
Table 2 of § 1051.505 -Ramped-modal Cycle for Testing Snowmobiles
RMC mode | Time in mode | Speed (percent)1 | Torque (percent)2 3 |
1a Steady-state | 27 | Warm Idle | 0 |
1b Transition | 20 | Linear Transition | Linear Transition |
2a Steady-state | 121 | 100 | 100 |
2b Transition | 20 | Linear Transition | Linear Transition |
3a Steady-state | 347 | 65 | 19 |
3b Transition | 20 | Linear Transition | Linear Transition |
4a Steady-state | 305 | 85 | 51 |
4b Transition | 20 | Linear Transition | Linear Transition |
5a Steady-state | 272 | 75 | 33 |
5b Transition | 20 | Linear Transition | Linear Transition |
6 Steady-state | 28 | Warm Idle | 0 |
1 Percent speed is percent of maximum test speed.
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.
3 Percent torque is percent of maximum torque at maximum test speed.
40 C.F.R. §1051.505