Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:9:p19
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 9 (pt 19/71)
Character Range: 262102–265344

of the collected background particulates of  the primary  dilution air, mg DF = dilution factor as determined in Section 4.3.1.1

5.2.                            Calculation of the specific emission

              The particulate emission (g/kWh) shall be calculated in the following way:

              where:

              Wact = actual cycle work as determined in Section 3.9.2, kWh.

Appendix 3

        ETC ENGINE DYNAMOMETER SCHEDULE

       'm' = motoring.

              A graphical display of the ETC dynamometer schedule is shown in Figure 5.

        Figure 5

        ETC dynamometer schedule

Appendix 4

        MEASUREMENT AND SAMPLING PROCEDURES

               1. INTRODUCTION

              Gaseous components, particulates, and smoke emitted by the engine submitted for testing shall be measured by the methods described in Annex V. The respective sections of Annex V describe the recommended analytical systems for the gaseous emissions (Section 1), the recommended particulate dilution and sampling systems (Section 2), and the recommended opacimeters for smoke measurement (Section 3).

              For the ESC, the gaseous components shall be determined in the raw exhaust gas. Optionally, they may be determined in the diluted exhaust gas, if a full flow dilution system is used for particulate determination. Particulates shall be determined with either a partial flow or a full flow dilution system.

              For the ETC, only a full flow dilution system shall be used for determining gaseous and particulate emissions, and is considered the reference system. However, partial flow dilution systems may be approved by the Technical Service, if their equivalency according to Section 6.2 to Annex I is proven, and if a detailed description of the data evaluation and calculation procedures is submitted to the Technical Service.

2.                                 DYNAMOMETER AND TEST CELL EQUIPMENT

              The following equipment shall be used for emission tests of engines on engine dynamometers.

2.1.                            Engine dynamometer

              An engine dynamometer shall be used with adequate characteristics to perform the test cycles described in Appendices 1 and 2 to this Annex. The speed measuring system shall have an accuracy of ± 2 % of reading. The torque measuring system shall have an accuracy of ± 3 % of reading in the range > 20 % of full scale, and an accuracy of ± 0,6 % of full scale in the range ≤ 20 % of full scale.

2.2.                            Other instruments

              Measuring instruments for fuel consumption, air consumption, temperature of coolant and lubricant, exhaust gas pressure and intake manifold depression, exhaust gas temperature, air intake temperature, atmospheric pressure, humidity and fuel temperature shall be used, as required. These instruments shall satisfy the requirements given in Table 8:

        Table 8

        Accuracy of measuring instruments
       Measuring instrument            Accuracy
Fuel consumption                ± 2 % of engine's maximum value
Air consumption                 ± 2 % of engine's maximum value
Temperatures ≤ 600 K (327 °C)   ± 2 K absolute
Temperatures >600 K (327 °C)