Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:10:p92
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 10 (pt 92/150)
Character Range: 982763–985727

pollutants shall be designed, constructed, assembled and installed so as to enable the engine and vehicle to comply with the provisions of this annex.
4.1. Prohibition of defeat strategies
 Engine systems and vehicles shall not be equipped with a defeat strategy.
4.2.  Reserved[48]
5.  Performance requirements
5.1. Emission strategies
 Emission strategies shall be designed so as to enable the engine system, in normal use, to comply with the provisions of this annex. Normal use is not restricted to the conditions of use as specified in paragraph 6.
5.1.1. Requirements for Base Emission Strategies (BES)
 A BES shall not discriminate between operation on an applicable type approval or certification test and other operation and provide a lesser level of emission control under conditions not substantially included in the applicable type approval or certification tests.
5.1.2. Requirements for Auxiliary Emission Strategies (AES)
 An AES shall not reduce the effectiveness of the emission control relative to a BES under conditions that may reasonably be expected to be encountered in normal vehicle operation and use, unless the AES satisfies one the following specific exceptions:
(a) Its operation is substantially included in the applicable type approval tests, including the off-cycle test procedures under paragraph 7. of this annex and the in-service provisions set out in paragraph 9. of this Regulation;
(b) It is activated for the purposes of protecting the engine and/or vehicle from damage or accident;
(c) It is only activated during engine starting or warm up as defined in this annex;
(d) Its operation is used to trade-off the control of one type of regulated emissions in order to maintain control of another type of regulated emissions under specific ambient or operating conditions not substantially included in the type approval or certification tests. The overall effect of such an AES shall be to compensate for the effects of extreme ambient conditions in a manner that provides acceptable control of all regulated emissions.
5.2. World-Harmonized Not-To-Exceed (WNTE) limits for gaseous and particulate exhaust emissions
5.2.1. Exhaust emissions shall not exceed the applicable emission limits specified in paragraph 5.2.2.
5.2.2. The applicable emission limits shall be the following:
(a) For CO: 2,000 mg/kWh;
(b) For THC: 220 mg/kWh;
(c) For NOx: 600 mg/kWh;
(d) For PM: 16 mg/kWh.
6.  Ambient and operating conditions
 The WNTE emission limits shall apply at:
(a) All atmospheric pressures greater than or equal to 82.5 kPa;
(b) All temperatures less than or equal to the temperature determined by equation 5 at the specified atmospheric pressure:

                T = -0.4514 x (101.3 – pb) + 311      (5)

                Where:

                T is the ambient air temperature, K

                pb is the atmospheric pressure, kPa
                  (c) All engine coolant temperature above 343 K (70 °C).
               The