Document ID: chunk:federal_register_of_legislation:F2021C00476:body:0:p15
Version: federal_register_of_legislation:F2021C00476
Segment Type: other
Provision Reference: 
Character Range: 41009–44053

requirements of paragraph 1.3. of Annex 4 to this Regulation, are satisfied.

         5.2.5. The requirements of paragraphs 5.2.2., 5.2.3. and 5.2.4. above must be met without the use of any automatic device of a kind such that its ineffectiveness might pass unnoticed through the fact that parts normally in a position of rest come into action only in the event of failure in the braking system.

         5.2.6. The service braking system shall act on all wheels of the vehicle and shall distribute its action appropriately among the axles.

         5.2.7. In the case of vehicles equipped with electric regenerative braking systems of category B, the braking input from other sources of braking, may be suitably phased to allow the electric regenerative braking system alone to be applied, provided that both the following conditions are met:

         5.2.7.1. Intrinsic variations in the torque output of the electrical regenerative braking system  (e.g. as a result of changes in the electric state of charge in the traction batteries) are automatically compensated by appropriate variation in the phasing relationship as long as the requirements [3]/ of one of the following annexes to this Regulation are satisfied:

          Annex 3, paragraph 1.3.2., or
          Annex 6, section 5.3. (including the case with the electric motor engaged), and

         5.2.7.2.                         Wherever necessary, to ensure that braking rate 3/ remains related to the driver's braking demand, having regard to the available tyre/road adhesion, braking shall automatically be caused to act on all wheels of the vehicle.

         5.2.8. The action of the service braking system shall be distributed between the wheels of one and the same axle symmetrically in relation to the longitudinal median plane of the vehicle.

          Compensation and functions, such as anti-lock, which may cause deviations from this symmetrical distribution shall be declared.

         5.2.8.1. Compensation by the electric control transmission for deterioration or defect within the braking system shall be indicated to the driver by means of the yellow warning signal specified in paragraph 5.2.21.1.2. below.  This requirement shall apply for all conditions of loading when compensation exceeds the following limits:

         5.2.8.1.1. a difference in transverse braking pressures on any axle:
          (a) of 25 per cent of the higher value for vehicle decelerations  2 m/sec2,
               (b) a value corresponding to 25 per cent at 2 m/sec2 for decelerations below this rate.

         5.2.8.1.2. an individual compensating value on any axle:
               (a)  50 per cent of the nominal value for vehicle decelerations  2 m/sec2,
              (b) a value corresponding to 50 per cent of the nominal value at 2 m/sec2 for decelerations below this rate.

         5.2.8.2. Compensation as defined above, is permitted only when the initial brake application is made at vehicle speeds greater than 10 km/h.

         5.2.9. Malfunctions of the