Title 40

SECTION 1036.505

1036.505 Ramped-modal testing procedures.

§ 1036.505 Ramped-modal testing procedures.

(a) Starting in model year 2021, you must measure CO2 emissions using the ramped-modal cycle in 40 CFR 86.1362 as described in § 1036.501, or using the ramped-modal cycle in this section.

(b) Measure emissions using the ramped-modal duty cycle shown in the following table to determine whether engines meet the steady-state compression-ignition standards specified in subpart B of this part:

Table 1 of § 1036.505 - Ramped-Modal Duty Cycle

RMC mode Time in mode
(seconds)
Engine
speed 1 2
Torque
(percent) 2 3
1a Steady-state 124 Warm Idle 0.
1b Transition 20 Linear Transition Linear Transition.
2a Steady-state 196 A 100.
2b Transition 20 Linear Transition Linear Transition.
3a Steady-state 220 B 50.
3b Transition 20 B Linear Transition.
4a Steady-state 220 B 75.
4b Transition 20 Linear Transition Linear Transition.
5a Steady-state 268 A 50.
5b Transition 20 A Linear Transition.
6a Steady-state 268 A 75.
6b Transition 20 A Linear Transition.
7a Steady-state 268 A 25.
7b Transition 20 Linear Transition Linear Transition.
8a Steady-state 196 B 100.
8b Transition 20 B Linear Transition.
9a Steady-state 196 B 25.
9b Transition 20 Linear Transition Linear Transition.
10a Steady-state 28 C 100.
10b Transition 20 C Linear Transition.
11a Steady-state 4 C 25.
11b Transition 20 C Linear Transition.
12a Steady-state 4 C 75.
12b Transition 20 C Linear Transition.
13a Steady-state 4 C 50.
13b Transition 20 Linear Transition Linear Transition.
14 Steady-state 144 Warm Idle 0.

1 Speed terms are 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 speed or torque setting of the current mode to the speed or torque setting of the next mode.

3 The percent torque is relative to maximum torque at the commanded engine speed.

1036.505 Ramped-modal testing procedures.

§ 1036.505 Ramped-modal testing procedures.

(a) Starting in model year 2021, you must measure CO2 emissions using the ramped-modal cycle in 40 CFR 86.1362 as described in § 1036.501, or using the ramped-modal cycle in this section.

(b) Measure emissions using the ramped-modal duty cycle shown in the following table to determine whether engines meet the steady-state compression-ignition standards specified in subpart B of this part:

Table 1 of § 1036.505 - Ramped-Modal Duty Cycle

RMC mode Time in mode
(seconds)
Engine
speed 1 2
Torque
(percent) 2 3
1a Steady-state 124 Warm Idle 0.
1b Transition 20 Linear Transition Linear Transition.
2a Steady-state 196 A 100.
2b Transition 20 Linear Transition Linear Transition.
3a Steady-state 220 B 50.
3b Transition 20 B Linear Transition.
4a Steady-state 220 B 75.
4b Transition 20 Linear Transition Linear Transition.
5a Steady-state 268 A 50.
5b Transition 20 A Linear Transition.
6a Steady-state 268 A 75.
6b Transition 20 A Linear Transition.
7a Steady-state 268 A 25.
7b Transition 20 Linear Transition Linear Transition.
8a Steady-state 196 B 100.
8b Transition 20 B Linear Transition.
9a Steady-state 196 B 25.
9b Transition 20 Linear Transition Linear Transition.
10a Steady-state 28 C 100.
10b Transition 20 C Linear Transition.
11a Steady-state 4 C 25.
11b Transition 20 C Linear Transition.
12a Steady-state 4 C 75.
12b Transition 20 C Linear Transition.
13a Steady-state 4 C 50.
13b Transition 20 Linear Transition Linear Transition.
14 Steady-state 144 Warm Idle 0.

1 Speed terms are 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 speed or torque setting of the current mode to the speed or torque setting of the next mode.

3 The percent torque is relative to maximum torque at the commanded engine speed.