Document ID: chunk:federal_register_of_legislation:F2023L00129:reg:20:p27
Version: federal_register_of_legislation:F2023L00129
Segment Type: reg
Provision Reference: reg 20 (pt 27/29)
Character Range: 292522–295472

and to promote mixing. The crankcase exhaust tube's outlet may orient in any direction relative to the raw exhaust flow.
              6.11. Paragraphs 6.11.1. and 6.11.2. shall apply to positive-ignition engines fuelled with petrol or E85.
6.11.1. The pressure in the crankcase shall be measured over the emissions test cycles at an appropriate location. It shall be measured at the dip-stick hole with an inclined-tube manometer.
6.11.1.1. The pressure in the intake manifold shall be measured to within ±1 kPa.
6.11.1.2. The pressure measured in the crankcase shall be measured to within ±0,01 kPa.
              6.11.2. Compliance with paragraph 6.10. shall be deemed satisfactory if, in every condition of measurement set out in paragraph 6.11.1., the pressure measured in the crankcase does not exceed the atmospheric pressure prevailing at the time of measurement.
7. Test procedures
7.1. Principles of emissions measurement
 To measure the specific emissions, the engine shall be operated over the test cycles defined in paragraphs 7.2.1. and 7.2.2. The measurement of specific emissions requires the determination of the mass of components in the exhaust and the corresponding engine cycle work. The components are determined by the sampling methods described in paragraphs 7.1.1. and 7.1.2.
7.1.1. Continuous sampling
 In continuous sampling, the component's concentration is measured continuously from raw or dilute exhaust. This concentration is multiplied by the continuous (raw or dilute) exhaust flow rate at the emission sampling location to determine the component's mass flow rate. The component's emission is continuously summed over the test cycle. This sum is the total mass of the emitted component.
       7.1.2.  Batch sampling
 In batch sampling, a sample of raw or dilute exhaust is continuously extracted and stored for later measurement. The extracted sample shall be proportional to the raw or dilute exhaust flow rate. Examples of batch sampling are collecting diluted gaseous components in a bag and collecting particulate matter (PM) on a filter. The batch sampled concentrations are multiplied by the total exhaust mass or mass flow (raw or dilute) from which it was extracted during the test cycle. This product is the total mass or mass flow of the emitted component. To calculate the PM concentration, the PM deposited onto a filter from proportionally extracted exhaust shall be divided by the amount of filtered exhaust.
7.1.3. Measurement procedures
 This annex applies two measurement procedures that are functionally equivalent. Both procedures may be used for both the WHTC and the WHSC test cycle:
(a) The gaseous components are sampled continuously in the raw exhaust gas, and the particulates are determined using a partial flow dilution system;
(b) The gaseous components and the particulates are determined using a full flow dilution system (CVS system).
 Any combination of the two principles (e.g. raw