Document ID: chunk:federal_register_of_legislation:F2008C00323:reg:120:p23
Version: federal_register_of_legislation:F2008C00323
Segment Type: reg
Provision Reference: reg 120 (pt 23/23)
Character Range: 300131–302031

the carburettors shall have the same setting.

         3.  SAMPLING OF GASES

         3.1. The sampling probe shall be inserted into the exhaust pipe to a depth of at least
         300 mm into the pipe connecting the exhaust with the sampling bag and as close as possible to the exhaust.

         3.2. The concentration in CO (CCO) and CO2 (CCO2) shall be determined from the measuring instrument readings or recordings, by use of appropriate calibration curves.

         3.3. The corrected concentration for carbon monoxide regarding four-stroke engines is:

   CCO corr = CCO  15     (per cent vol.)
   CCO + CCO2

         3.4. The concentration in CCO (see paragraph 3.2.) measured according to the formulae contained in 3.3. need not be corrected if the total of the concentrations measured (CCO + CCO2) is for four-stroke engines at least:

                         – for petrol 15 per cent
                         – for LPG 13.5 per cent
                         – for NG  11.5 per cent

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Annex 6

TYPE III TEST
(Verifying emissions of crankcase gases)

         1. INTRODUCTION

         This Annex describes the procedure for the Type III test defined in paragraph 5.3.3. of this Regulation.

         2.  GENERAL PROVISIONS

         2.1. The Type III test shall be carried out on a vehicle with a positive-ignition engine, which has been, subjected to the Type I and the Type II test, as applicable.

         2.2. The engines tested shall include leak-proof engines other than those so designed that even a slight leak may cause unacceptable operating faults (such as flat-twin engines).

         3.  TEST CONDITIONS

         3.1. Idling shall be regulated in conformity with the manufacturer's recommendations.

         3.2. The measurement shall be performed in the following three sets of conditions of engine operation:

Condition Number  Vehicle speed (km/h)