Document ID: chunk:federal_register_of_legislation:F2011C00805:reg:20:p23
Version: federal_register_of_legislation:F2011C00805
Segment Type: reg
Provision Reference: reg 20 (pt 23/23)
Character Range: 206242–209706

The mass M of each pollutant emitted by the vehicle during the test shall be determined by obtaining the product of the volumetric concentration and the volume of the gas in question, with due regard for the following densities under above-mentioned reference conditions:

                                             In the case of carbon monoxide (CO):  d = 1.25 g/l

           In the case of hydrocarbons:

                                             for petrol (CH1.85)   d = 0.619 g/1

                                             for diesel (CHl.86)   d = 0.619 g/1

                                             for LPG (CH2.525)   d = 0.649 g/l

                                             for NG (CH4)   d = 0.714 g/l

                                         In the case of nitrogen oxides (NOx):  d = 2.05 g/1

           The mass m of particulate pollutant emissions from the vehicle during the test shall be defined by weighing the mass of particulates collected by the two filters, m1 by the first filter, m2 by the second filter:

                               if 0.95 (m1 + m2)  m1, m = m1,

                               if 0.95 (m1 + m2) > m1, m = m1 + m2,

                               if m2 > m1, the test is cancelled.

           Appendix 8 to this Annex gives calculations, followed by examples, used to determine the mass emissions of gaseous and particulate pollutants.

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Annex 4 - Appendix 1

BREAKDOWN OF THE OPERATING CYCLE USED FOR THE TYPE I TEST

         1.  OPERATING CYCLE

         The operating cycle, made up of a Part One (urban cycle) and Part Two (extra-urban cycle), is illustrated in Figure 1/1.

         2.  ELEMENTARY URBAN CYCLE (Part One)

         (See Figure 1/2 and Table 1.2.)

         2.1. Breakdown by phases:

                         Time (s)   per cent

Idling                   60        30.8       35.4

Idling, vehicle moving,  9         4.6
clutch engaged on one
combination

Gear-changing            8         4.1

Accelerations            36        18.5

Steady-speed periods     57        29.2

Decelerations            25        12.8

                         195       100

         2.2. Breakdown by use of gears:

                         Time (s)   per cent
Idling                   60        30.8       35.4
Idling, vehicle moving,  9         4.6
clutch engaged on one
combination
Gear-changing            8         4.1
First gear               24        12.3
Second gear              53        27.2
Third gear               41        21
                         195       100

         2.3. General information:

                                             Average speed during test :    19 km/h
                                             Effective running time :    195 s
                                             Theoretical distance covered per cycle :   1.013 km
                                             Equivalent distance for the four cycles :   4.052 km

Figure 1/1

Operating cycle for the Type I test

Table 1.2
Elementary urban operating cycle on the chassis dynamometer (Part One)

No. of operation  Operation          Phase  Acceleration  Speed   Duration of each  Cumulative  Gear to be used in
                                             (m/s2)       (km/h)                    time        the case of a
                                                                                    (s)         manual gearbox
Operation   (s)   Phase  (s)