Document ID: chunk:federal_register_of_legislation:F2005L03375:front:0:p5
Version: federal_register_of_legislation:F2005L03375
Segment Type: other
Provision Reference: 
Character Range: 10524–13583

technical requirements of the Not to Exceed (NTE) screening tool described in Attachment A to this Appendix B and meet the emission limits in Table 2 when operated in the NTE Control Area.  In relation to the smoke and opacity limits, the engine is required to comply with either the Smoke or Alternate Opacity limits in the table, not both.

    Table 2 – Emission Limits under the NTE Screening Tool

Engine Type   Emission Limits
              Mass of Oxides of Nitrogen  Smoke        Alternate Opacity

              (g/kWh)                     (Filter No)  Steady State                Transient
                                                       (10s average, 12.7cm path)  (30s average, 12.7cm path)
LMB           6.7                         1.0          4%                          4%
HHDDE         9.4                         1.0          4%                          4%

    The manufacturer need not submit test data at the time of certification to satisfy the NTE screening limits.  The manufacturer shall state in the certification application that the engine is designed to meet the NTE limits specified above and have a sound technical basis for making such a statement

3.1.3           Use of AECDs
3.1.3.1      The use of any Auxiliary Emission Control Device (AECD) must be in accordance with all the requirements of this paragraph 3.1.3.  AECD means any device or element of design that senses temperature, vehicle speed, engine RPM, transmission gear, manifold vacuum, or any other parameter for the purpose of activating, modulating, delaying, or deactivating the operation of the emission control system.
3.1.3.2 The manufacturer shall comply with all applicable AECD reporting requirements specified by the US EPA and the US Code of Federal Regulations Part 86.
3.1.3.3      An AECD shall not be active unless engine operating conditions are generally correlatable to sustained highway operation (vehicle speed of 80 km/h or greater) or generally correlatable to sustained high load operation (greater than 85% of maximum load at that RPM for a one minute rolling average or greater than 75% of maximum load at that RPM for a two minute rolling average). Such AECDs shall return the engine to the injection timing values used to meet the Oxide of Nitrogen (NOx) levels specified in 40 CFR 86.098-11 when engine operations return to transient conditions.
3.1.3.4      The manufacturer may install the following AECD to protect the engine or vehicle from damage due to overheating: timing may be advanced when coolant temperature and/or intake manifold temperature rises 2.8 oC or more above cooling fan-on temperature even if emissions exceed the applicable limits in Tables 1 and 2 of this Appendix B. This feature must be inactive when the coolant temperature and/or intake manifold temperature is below 2.8 oC above fan-off temperature. For modulated or variable-speed fans, fan-on temperature refers to the temperature at which the fan drive is fully engaged, or at which the fan is set to maximum speed; and fan-off refers to the