40 CFR Appendix II to Part 1042: Appendix II to Part 1042— Steady-State Duty Cycles

(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.