Document ID: chunk:federal_register_of_legislation:F2011C00805:reg:11:p28
Version: federal_register_of_legislation:F2011C00805
Segment Type: reg
Provision Reference: reg 11 (pt 28/45)
Character Range: 496427–499329

The ratio of emission results "r" should be determined for each pollutant as shown below:

Type(s) of fuel  Reference fuels  Calculation of "r"
LPG and petrol   Fuel A
(Approval B)                      r=                   B .
or LPB only      Fuel B           A
(Approval D)
NG and petrol    Fuel G 20
(Approval B)                      r=                  G25
or NG only       Fuel G 25        G20
(Approval D)

         3.2. Exhaust emissions approval of a member of the family

         For a member of the family a Type I test shall be performed with one reference fuel.  This reference fuel may be either reference fuel.  The vehicle is considered to comply if the following requirements are met:

         3.2.1. the vehicle complies with the definition of a family member as defined under paragraph 2.2. above;

         3.2.2. if the test fuel is reference fuel A for LPG or G20 for NG, the emission result shall be multiplied by the relevant factor "r" if r > 1;  if r < 1, no correction is needed;

         if the test fuel is reference fuel B for LPG or G25 for NG, the emission result shall be divided by the relevant factor "r" if r < 1;  if r > 1, no correction is needed;

         3.2.3. the vehicle shall comply with the emission limits valid for the relevant category for both measured and calculated emissions;

         3.2.4. if repeated tests are made on the same engine the results on reference fuel G20, or A, and those on reference fuel G25, or B, shall first be averaged; the "r" factor shall then be calculated from these averaged results.

         4. GENERAL CONDITIONS

         4.1. Tests for conformity of production may be performed with a commercial fuel of which the C3/C4 ratio lies between those of the reference fuels in the case of LPG, or of which the Wobbe index lies between those of the extreme reference fuels in the case of NG.  In that case a fuel analysis needs to be present.
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Annex 13

EMISSIONS  TEST  PROCEDURE  FOR  A  VEHICLE  EQUIPPED  WITH  A  PERIODICALLY  REGENERATING  SYSTEM

         1. INTRODUCTION

          This Annex defines the specific provisions regarding type-approval of a vehicle equipped with a periodically regenerating system as defined in paragraph 2.20. of this Regulation.

         2. SCOPE AND EXTENSION OF THE TYPE APPROVAL

         2.1. Vehicle family groups equipped with periodically regenerating system

         The procedure applies to vehicles equipped with a periodically regenerating system as defined in paragraph 2.20. of this Regulation.   For the purpose of this Annex vehicle family groups may be established.  Accordingly, those vehicle types with regenerative systems, whose parameters described below are identical, or within the stated tolerances, shall be considered to belong to the same family with respect to measurements specific to the defined periodically regenerating systems.