Document ID: chunk:federal_register_of_legislation:F2021C00509:reg:6:p10
Version: federal_register_of_legislation:F2021C00509
Segment Type: reg
Provision Reference: reg 6 (pt 10/15)
Character Range: 184495–187625

moped is equipped with devices which are not necessary for its propulsion, but which are used whilst the moped is in normal service on the road, those devices shall be in operation in accordance with the specifications of the manufacturer.

          3.                                               METHODS OF TESTING

          3.1.                                         Measurement of noise of mopeds in motion

          3.1.1.                                   General conditions of test

          3.1.1.1.                             At least two measurements shall be made on each side of the moped. Preliminary measurements may be made for adjustment purposes, but shall be disregarded.
          3.1.1.2.                             The microphone shall be situated 1.2 m +/- 0.1 m above ground level at a distance of 7.5 m +/- 0.2 m from the path of the moped's centre line, measured along the perpendicular PP' to that line (see appendix, fig. l).

          3.1.1.3.                             Two lines, AA' and BB', parallel to the microphone line PP' and situated respectively 10 m forward and 10 m rearward of that line shall be marked out on the test track. The moped shall approach line AA' at an initial steady speed as specified below. When the front of the moped reaches line AA' the throttle shall be fully opened as quickly as practically possible and kept in that position until the rear of the moped reaches line BB' ; the throttle must then be returned as quickly as possible to the idle position.
          For all measurements, the moped shall be driven in a straight line along the test track in such a way that the track of the median longitudinal plane of the moped is as close as possible to the line CC'.

          3.1.1.4.                             The maximum sound value recorded at each measurement shall constitute the result of the measurement. The measurements shall be considered valid if the difference between the two consecutive measurements on the same side of the moped is not more than 2dB(A).

          3.1.2.                                   Determination of the approach speed

          3.1.2.1.                             Approach speed

          The moped shall approach the line AA' at steady speed equal to its maximum speed if the latter is below or equal to 30 km/h. If the maximum speed is above 30 km/h, the vehicle shall approach AA' at a steady speed of 30 km/h.

          3.1.2.2.                             If the moped is fitted with a manually-operated gearbox, the highest gear shall be selected which enables it to pass over the line AA' with an engine speed above or equal to one half the engine speed at which the engine produces its maximum power.

          3.1.2.3.                             If the moped is fitted with automatic transmission, it shall be driven at the speeds indicated in 3.1.2.1.

          3.2.                                         MEASUREMENT OF NOISE EMITTED BY STATIONARY MOPEDS (conditions and method of measurement for testing vehicles in service) .

          In addition, in order to facilitate subsequent testing