Document ID: chunk:federal_register_of_legislation:F2023C00228:reg:7:p1
Version: federal_register_of_legislation:F2023C00228
Segment Type: reg
Provision Reference: reg 7 (pt 1/12)
Character Range: 594958–597986

7                  4D-V                                    ---                           (2)    ---   (2)
                   MIN. LUMINOUS INTENSITY OF THE MAXIMUM  51.2                          ---    32    ---
                   MAX. LUMINOUS INTENSITY                 ---                           180.0  ---   180.0

    (1) Intensity at H-V shall be equal to or greater than 80 per cent of the maximum intensity in the beam pattern.
    (2) Intensity at 4D-V shall be equal to or less than 30 per cent of the maximum intensity in the beam pattern.
Figure D
Primary Driving Beam

Figure E
Secondary Driving Beam

 Annex 4

TESTS FOR STABILITY OF PHOTOMETRIC PERFORMANCE ON COMPLETE CLASS B, C AND D HEADLAMPS

TESTS ON COMPLETE CLASS B HEADLAMPS

Once the photometric values have been measured according to the prescriptions of this Regulation, in the point for Emax for driving beam and in points HV, 50R, 50L and B50 for passing beam a complete headlamp sample shall be tested for stability of photometric performance in operation. "Complete headlamp" shall be understood to mean the complete lamp itself including those surrounding body parts and lamps which could influence its thermal dissipation.

       1. TEST FOR STABILITY OF PHOTOMETRIC PERFORMANCE

       The tests shall be carried out in a dry and still atmosphere at an ambient temperature of 23 °C  5 °C, the complete headlamp being mounted on a base representing the correct installation on the vehicle.

       1.1. Clean headlamp

       The headlamp shall be operated for 12 hours as described in paragraph 1.1.1. and checked as prescribed in paragraph 1.1.2.

       1.1.1. Test procedure [36]/

       The headlamp shall be operated for a period according to the specified time, so that:

            1.1.1.1. (a) In the case where only one lighting function (driving or passing beam or front fog lamp) is to be approved, the corresponding filament is lit for the prescribed time, [37]/

            (b) In the case of a headlamp with a passing beam and one or more driving beams or in case of a headlamp with a passing beam and a front fog lamp:

                (i)                 the headlamp shall be subjected to the following cycle until the time specified is reached:
               15 minutes, passing-beam filament lit;
               5 minutes, all filaments lit.

                (ii)               (ii) if the applicant declares that the headlamp is to be used with only the passing beam lit or only the driving beam(s) lit [38]/ at a time, the test shall be carried out in accordance with this condition, activating 2/ successively the passing beam half of the time and the driving beam(s) (simultaneously) for half the time specified in paragraph 1.1. above.

             (c)  in the case of a headlamp with a front fog lamp and one or more driving beams:

                (i)                 the headlamp shall be subjected to the following cycle until the time specified is reached:
                15 minutes, front fog lamp lit;