Document ID: chunk:federal_register_of_legislation:F2018L01515:body:0:p28
Version: federal_register_of_legislation:F2018L01515
Segment Type: other
Provision Reference: 
Character Range: 76790–81230

The approval numbers indicate that, at the dates when the respective approvals were given, UN Regulation No. 79 incorporating the 02 series of amendments and UN Regulation No. 31 included the 02 series of amendments.

Annex 3
       Braking performance for vehicles using the same energy source to supply steering equipment and braking device
1. For tests carried out in accordance with this annex the following vehicle conditions shall be met:
1.1. The vehicle shall be loaded to its technically permissible maximum mass distributed between the axles as declared by the vehicle manufacturer. Where provision is made for several arrangements of the mass on the axles, the distribution of the maximum mass between the axles shall be such that the mass on each axle is proportional to the maximum permissible mass for each axle. In the case of tractors for semi-trailers, the mass may be repositioned approximately half way between the kingpin position resulting from the above loading conditions and the centreline of the rear axle(s);
1.2. The tyres shall be inflated to the cold inflation pressure prescribed for the mass to be borne by the tyres when the vehicle is stationary;
1.3. Before the start of the tests the brakes shall be cold, that is, with a disc or outer brake drum surface temperature less than 100 oC.
2. If an energy source failure occurs, service braking performance on the first brake application shall achieve the values given in the table below.

Table 3
Category                                                                                                                                                                                                      V (km/h)  Service braking (m/s²)  F (daN)
M1                                                                                                                                                                                                            100       6.43                    50
M2 and M3                                                                                                                                                                                                     60        5.0                     70
N1 a, b                                                                                                                                                                                                       (i)       80                      5.0      70
(ii)                                                                                                                                                                                                          100       6.43                    50
N2 and N3                                                                                                                                                                                                     60        5.0                     70
 a The applicant shall select the appropriate row (i) or (ii) and this choice shall be subject to the agreement of the Technical Service.
 b Information: The values in row (i) are aligned with the corresponding provisions in UN Regulation No. 13, the values in row (ii) are aligned with the corresponding provisions in UN Regulation No. 13-H.

3. After any failure in the steering equipment, or the energy supply, it shall be possible after eight full stroke actuations of the service brake control, to achieve at the ninth application, at least the performance prescribed for the secondary (emergency) braking system (see table below).
 In the case where secondary performance requiring the use of stored energy is achieved by a separate control, it shall still be possible after eight full stroke actuations of the service brake control to achieve at the ninth application, the residual performance (see table below).

    Table 4
Secondary and residual efficiency
Category                                                                                                                                                                                                      V (km/h)  Secondary braking (m/s²)  Residual braking (m/s²)
M1                                                                                                                                                                                                            100       2.44                      -
M2 and M3