Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:9:p11
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 9 (pt 11/71)
Character Range: 237392–240441

the maximum torque observed from the mapping curve at 1 288 min−1 is 700 Nm.

3.                                 EMISSIONS TEST RUN

              At the manufacturers request, a dummy test may be run for conditioning of the engine and exhaust system before the measurement cycle.

              NG and LPG fuelled engines shall be run-in using the ETC test. The engine shall be run over a minimum of two ETC cycles and until the CO emission measured over one ETC cycle does not exceed by more than 10 % the CO emission measured over the previous ETC cycle.

3.1.                            Preparation of the sampling filters (diesel engines only)

              At least one hour before the test, each filter (pair) shall be placed in a closed, but unsealed Petri dish and placed in a weighing chamber for stabilisation. At the end of the stabilisation period, each filter (pair) shall be weighed and the tare weight shall be recorded. The filter (pair) shall then be stored in a closed Petri dish or sealed filter holder until needed for testing. If the filter (pair) is not used within eight hours of its removal from the weighing chamber, it must be conditioned and reweighed before use.

3.2.                            Installation of the measuring equipment

              The instrumentation and sample probes shall be installed as required. The tailpipe shall be connected to the full flow dilution system.
3.3.                            Starting the dilution system and the engine

              The dilution system and the engine shall be started and warmed up until all temperatures and pressures have stabilised at maximum power according to the recommendation of the manufacturer and good engineering practice.

3.4.                            Starting the particulate sampling system (diesel engines only)

              The particulate sampling system shall be started and running on by-pass. The particulate background level of the dilution air may be determined by passing dilution air through the particulate filters. If filtered dilution air is used, one measurement may be done prior to or after the test. If the dilution air is not filtered, measurements at the beginning and at the end of the cycle, may be done, and the values averaged.

3.5.                            Adjustment of the full flow dilution system

              The total diluted exhaust gas flow shall be set to eliminate water condensation in the system, and to obtain a maximum filter face temperature of 325 K (52 °C) or less (see Annex V, Section 2.3.1, DT).

3.6.                            Checking the analysers

              The emission analysers shall be set at zero and spanned. If sample bags are used, they shall be evacuated.

3.7.                            Engine starting procedure

              The stabilised engine shall be started according to the manufacturer's recommended starting procedure in the owner's manual, using either a production starter motor or the dynamometer. Optionally, the test may start directly from the engine