Document ID: chunk:federal_register_of_legislation:F2008C00179:body:0:p23
Version: federal_register_of_legislation:F2008C00179
Segment Type: other
Provision Reference: 
Character Range: 63895–66887

Results

    2.1              In tests carried out according to the above procedures, the deceleration of the headform shall not exceed 80 g continuously for more than 3 milliseconds. The deceleration rate taken shall be the average of the readings of the two decelerometers.

    3.                   Equivalent procedures

    3.1              Equivalent test procedures shall be permitted on condition that the results required in paragraph 2. above can be obtained.

    3.2              Responsibility for demonstrating the equivalence of a method other than that described in paragraph l. shall rest with the person using such a method.

Annex 5

PROCEDURE FOR DETERMINING THE "H" POINT AND THE ACTUAL TORSO ANGLE FOR SEATING POSITIONS IN MOTOR VEHICLES

      1. PURPOSE

    The procedure described in this annex is used to establish the "H" point location and the actual torso angle for one or several seating positions in a motor vehicle and to verify the relationship of measured data to design specifications given by the vehicle manufacturer. [1/]

    2.                   DEFINITIONS

    For the purposes of this annex:

    2.1              "Reference data" means one or several of the following characteristics of a seating position:

    2.1.1        the "H" point and the "R" point and their relationship,

    2.1.2        the actual torso angle and the design torso angle and their relationship.

    2.2              "Three-dimensional 'H' point machine" (3-D H machine) means the device used for the determination of "H" points and actual torso angles. This device is described in appendix 1 to this annex;

    2.3              "'H' point" means the pivot centre of the torso and the thigh of the 3-D H machine installed in the vehicle seat in accordance with paragraph 4 below. The "H" point is located in the centre of the centreline of the device which is between the "H" point sight buttons on either side of the 3-D H machine. The "H" point corresponds theoretically to the "R" point (for tolerances see paragraph 3.2.2. below) . Once determined in accordance with the procedure described in paragraph 4, the "H" point is considered fixed in relation to the seat-cushion structure and to move with it when the seat is adjusted;

    2.4              "'R' point" or "seating reference point" means a design point defined by the vehicle manufacturer for each seating position and established with respect to the threedimensional 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;

    2.6              "Actual torso angle" means the angle measured between a vertical line through the "H" point 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 measured between a