# 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.