Document ID: chunk:federal_register_of_legislation:F2019C00053:front:0:p36
Version: federal_register_of_legislation:F2019C00053
Segment Type: other
Provision Reference: 
Character Range: 103586–106800

or "seating reference point" means a design point defined by the vehicle manufacturer for each seating position and established with respect to the three- dimensional reference system;

       2.5.                   "Torso-line" means the centreline of the probe of the 3-D H machine with the probe in the fully rearward position;

  1/ In any seating position other than front seats where the "H" point cannot be determined using the "Three-dimensional 'H' point machine" or procedures, the "R" point indicated by the

   manufacturer may be taken as a reference at the discretion of the competent authority.

       2.6.                   "Actual torso angle" means the angle measured between a vertical line through the "H" point and the torso line using the back angle quadrant on the 3-D H machine. The actual torso angle corresponds theoretically to the design torso angle (for tolerances see paragraph 3.2.2. below):

       2.7.                   "Design torso angle" means the angle measures between a vertical line through the "R" point and the torso line in a position which corresponds to the design position of the seat-back established by the vehicle manufacturer;

       2.8.                   "Centreplane of occupant" (C/LO) means the median plane of the 3-D H machine positioned in each designated seating position; it is represented by the co-ordinate of the "H"  point  on  the  "Y" axis. For  individual  seats, the  centreplane  of  the  seat coincides with the centreplane of the occupant. For other seats, the centreplane of the occupant is specified by the manufacturer;

       2.9.                   "Three-dimensional reference system" means a system as described in appendix 2 to this annex;

       2.10.              "Fiducial marks" are physical points (holes, surfaces, marks or indentations) on the vehicle body as defined by the manufacturer;

       2.11.              "Vehicle measuring attitude" means the position of the vehicle as defined by the co- ordinates of fiducial marks in the three-dimensional reference system.

       3.                         REQUIREMENTS

       3.1.                   Data presentation

       For each seating position where reference data are required in order to demonstrate compliance with the provisions of the present Regulation, all or an appropriate selection of the following data shall be presented in the form indicated in appendix 3 to this annex:

       3.1.1.            the co-ordinates of the "R" point relative to the three-dimensional reference system;

       3.1.2.            the design torso angle;

       3.1.3.            all indications necessary to adjust the seat (if it is adjustable) to the measuring position set out in paragraph 4.3. below.

       3.2.                   Relationship between measured data and design specifications

       3.2.1.           The co-ordinates of the "H" point and the value of the actual torso angle obtained by the procedure set out in paragraph 4. below shall be compared, respectively, with the co-ordinates of the "R" point and the value of the design torso angle indicated by the vehicle manufacturer.

       3.2.2.            The relative positions of the "R" point