Document ID: chunk:federal_register_of_legislation:F2023C00229:reg:10:p25
Version: federal_register_of_legislation:F2023C00229
Segment Type: reg
Provision Reference: reg 10 (pt 25/30)
Character Range: 589592–592844

of ETC tests during a regeneration (minimum of one ETC)

             = emissions during a regeneration

             = emissions outside a regeneration.'

  (g)     Appendix 4 is amended as follows:

       (i)      Section 1 is replaced by the following:

        '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, the following systems may be used

                —      a CVS full flow dilution system for determining gaseous and particulate emissions (double dilution systems are permissible),
                or
                —      a combination of raw exhaust measurement for the gaseous emissions and a partial flow dilution system for particulate emissions,
                or
                —      any combination of the two principles (e.g. raw gaseous measurement and full flow particulate measurement).'

       (ii)    Section 2.2 is replaced by the following:

        '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 9:

Table 9

Accuracy of measuring instruments

Measuring Instrument           Accuracy
Fuel Consumption               ± 2 % of Engine's Maximum Value
Air Consumption                ± 2 % of reading or ± 1 % of engine's maximum value whichever is greater
Exhaust Gas Flow               ± 2,5 % of reading or ± 1,5 % of engine's maximum value whichever is greater
Temperatures ≤ 600 K (327 °C)  ± 2 K Absolute
Temperatures ≥ 600 K (327 °C)  ± 1 % of Reading
Atmospheric Pressure           ± 0,1 kPa Absolute
Exhaust Gas Pressure           ± 0,2 kPa Absolute
Intake Depression              ± 0,05 kPa Absolute
Other Pressures                ± 0,1 kPa Absolute
Relative Humidity              ± 3 % Absolute
Absolute Humidity              ± 5 % of Reading
Dilution Air Flow              ± 2 % of Reading
Diluted Exhaust Gas Flow       ± 2 % of Reading'

       (iii)   Sections 2.3 and 2.4 are deleted.

       (iv)   Sections 3 and 4 are replaced by the following:

        '3.  DETERMINATION OF THE GASEOUS COMPONENTS

        3.1.  General analyser specifications

              The analysers shall have a measuring range appropriate for the accuracy required to measure the concentrations of the exhaust gas components (section 3.1.1). It is recommended