Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:9:p21
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 9 (pt 21/22)
Character Range: 204528–207559

torque curve at full load shall be determined by experimentation to calculate the torque values for the specified test modes under net conditions, as specified in Annex II, Appendix 1, Section 8.2. The power absorbed by engine-driven equipment, if applicable, shall be taken into account. The dynamometer setting for each test mode shall be calculated using the formula:

              s = P(n) × (L/100) if tested under net conditions

              s = P(n) × (L/100) + (P(a) - P(b)) if not tested under net conditions where:
              s = dynamometer setting, kW

              P(n) = net engine power as indicated in Annex II, Appendix 1, Section 8.2, kW
              L = per cent load as indicated in Section 2.7.1, %
              P(a) = power absorbed by auxiliaries to be fitted as indicated in Annex II, Appendix 1, Section 6.1

                   P(b) = power absorbed by auxiliaries to be removed as indicated in Annex II, Appendix 1, Section 6.2

2.                                 ESC TEST RUN

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

              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.

2.2.                            Installation of the measuring equipment

              The instrumentation and sample probes shall be installed as required. When using a full flow dilution system for exhaust gas dilution, the tailpipe shall be connected to the system.

2.3.                            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.

2.4.                            Starting the particulate sampling system

              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.

2.5.                            Adjustment of the dilution ratio

              The dilution air shall be set such that  the temperature of  the diluted exhaust