Article 2 Definitions

For the purposes of this Regulation, the following definitions shall apply:

1. 1..

   ‘vehicle type with regard to the windscreen defrosting and demisting systems’ means vehicles which do not differ in such essential respects as:

   • the characteristics of the defrosting and demisting systems,

   • the external and internal forms and arrangements within the 180° forward field of vision area of the driver which may affect visibility,

   • the shape, size, thickness and characteristics of the windscreen and its mounting,

   • the maximum number of seating positions;

2. 2..

   ‘engine’ means a combustion engine running on either liquid or gaseous fuel;

3. 3..

   ‘defrosting system’ means the system intended to eliminate frost or ice on the outside surface of the windscreen;

4. 4..

   ‘defrosted area’ means the area of the windscreen having a dry outside surface or an outside surface covered with melted or partially melted wet frost which can be removed by the vehicle’s windscreen wiper system;

5. 5..

   ‘demisting system’ means the system intended to remove mist on the inside surface of the windscreen;

6. 6..

   ‘mist’ means a film of condensate on the inside face of the glazed surface of the windscreen;

7. 7..

   ‘demisted area’ means the area of the windscreen having a dry inside surface, without any drops or traces of water, after previously being covered by mist;

8. 8..

   ‘vision area A’ means test area A as defined in paragraph 2.2 of Annex 18 of UN-ECE Regulation 43^f1;

9. 9..

   ‘vision area B’ means reduced test area B as defined in paragraph 2.4 of Annex 18 of UN-ECE Regulation 43, without the exclusion of the area defined in paragraph 2.4.1 thereof;

10. 10..

    ‘design torso angle’ means the angle measured between a vertical line through the R-point or seating reference point and the torso line in a position which corresponds to the design position of the seat-back as declared by the vehicle manufacturer;

11. 11..

    ‘R-point’ or seating reference point means the design point defined by the vehicle manufacturer for each seating position with respect to the three-dimensional reference system;

12. 12..

    ‘three-dimensional reference system’ means a reference grid which consists of a vertical longitudinal plane X-Z, a horizontal plane X-Y and a vertical transverse plane Y-Z in accordance with the provisions of Appendix 2 of Annex II;

13. 13..

    ‘primary reference marks’ means holes, surfaces, marks or other identification signs on the vehicle body or chassis of which the X, Y and Z coordinates within the three-dimensional reference grid are specified by the vehicle manufacturer;

14. 14..

    ‘vehicle master control switch’ means the device by which the vehicle’s on-board electronics system is brought from being switched off, as is the case when a vehicle is parked without the driver being present, to normal operation mode.