Document ID: chunk:federal_register_of_legislation:F2006L02312:body:0:p7
Version: federal_register_of_legislation:F2006L02312
Segment Type: other
Provision Reference: 
Character Range: 18256–20983

"Auxiliary seat" means a seat for the manikin mounted on  the trolley to the rear of the seat to be tested;

2.18. "Reference plane" means the plane passing through the  points of contact of the heels of the manikin, used for the determination of the H point and the actual angle of torso for the seating position of motor vehicles according to the prescriptions of annex 8;

This "reference plane" is horizontal.

2.19. "Reference height" means the height of the top of the  seat above the reference plane;

2.20. "Manikin", a manikin corresponding to the specifications  for HYBRID II.[1]

3APPLICATION FOR APPROVAL. NOT USED

4. APPROVAL. NOT USED

5. REQUIREMENTS FOR A SEAT TYPE

5.1. Every adjustment and displacement system provided shall  incorporate a locking system, which shall operate automatically.

5.2. Each type of seat may be checked by either of the tests  described in annex 4.  Another suitable test may be used provided that its equivalence with one of the prescribed tests is demonstrated.

 The test is to determine:

5.2.1. If the seat occupant(s) is (are) correctly retained by  the seat(s) in front of him (them).

 This requirement shall be considered satisfied:

5.2.1.1. either, in the case of the test prescribed in paragraph  2 of annex 4, if the forward movement of any part of the trunk and the head of the manikin does not pass beyond the transversal vertical plane situated at 1.6 m from the R point of the auxiliary seat;

5.2.1.2. or, in the case of the test prescribed in paragraph 3 of  annex 4, if the maximum displacement of the central point of application of each force prescribed in paragraph 3.2.1. of annex 4 measured in the horizontal plane and in the longitudinal median plane of the relevant seating position does not exceed 400 mm.

5.2.2. If the seat occupant(s) is (are) not seriously injured.

 This requirement shall be considered satisfied:

5.2.2.1. either, in the case of the test prescribed in paragraph  2 of annex 4 which uses an instrumented manikin, if the following biomechanical acceptability criteria, determined in accordance with annex 7, are met;

5.2.2.1.1. The head acceptability criterion HAC is less than 500;

5.2.2.1.2. The thorax acceptability criterion (ThAC) is less than 30 g[3]     except for periods totalling less than 3 ms;

5.2.2.1.3. The femur acceptability criterion (FAC) is less than 10  kN and the value of 8 kN is not exceeded for periods totalling more than 20 ms;

5.2.2.2. or, in the case of the test prescribed in paragraph 3 of  annex 4, if the following energy absorption characteristics are met;

5.2.2.2.1. The maximum displacement of the central point of  application of each of the forces prescribed in paragraph 3.2.1. of annex