Document ID: chunk:federal_register_of_legislation:F2021C01192:body:0:p33
Version: federal_register_of_legislation:F2021C01192
Segment Type: other
Provision Reference: 
Character Range: 89099–91868

test, make four stops from 50 km/h with the engine connected, at a mean deceleration of 3 m/s2. Allow an interval of 1.5 km between the start of successive stops. Immediately after each stop, accelerate at maximum rate to 50 km/h and maintain that speed until making the next stop.
1.5.3.1.  Vehicles equipped with an electrical regenerative braking system of category B may have their batteries re-charged or replaced by a charged set, in order to complete the recovery procedure.
 The procedures may be conducted without a regenerative braking component.
1.5.4.  Recovery performance
  At the end of the recovery procedure, the recovery performance of the service braking system shall be measured in the same conditions as for the Type-0 test with the engine disconnected (the temperature conditions may be different), using a mean force on the control, which is not more than the mean control force used in the corresponding Type-0 test.
  This recovery performance shall not be less than 70 per cent, nor more than 150 per cent, of the figure recorded in the Type-0 test with the engine disconnected.
1.5.4.1. For vehicles equipped with an electrical regenerative braking system of category B, the recovery test shall be made with no regenerative braking component, i.e. under the conditions of paragraph 1.5.4. above.
 After the further reconditioning of the linings, a second repeat Type-0 test shall be made from the same speed and with no electric regenerative braking contribution as in the recovery test with the engine/motors disconnected, and comparison shall be made between these test results.
 The recovery performance shall not be less than 70 per cent, nor more than 150 per cent of the figure recorded in this final repeat Type-0 test.
2.   Performance of braking systems
2.1.  Service braking system
2.1.1.  The service brakes shall be tested under the conditions shown in the following table:
(A)  Type-0 test   v     100 km/h
     with engine   s    0.1 v+0.0060 v2  (m)
     disconnected  dm   6.43 m/s2

(B)  Type-0 test   v     80% vmax   160 km/h
     with engine   s    0.1 v+0.0067 v2  (m)
     connected     dm   5.76 m/s2

                   f     6.5 - 50 daN

 Where:
  v = test speed, in km/h
  s = stopping distance, in metres
  dm = mean fully developed deceleration, in m/s2
  f = force applied to foot control, in daN
  vmax = maximum speed of the vehicle, in km/h

2.1.2.  In the case of a motor vehicle authorized to tow an unbraked trailer, the minimum Type-0 performance of the combination shall not be less
than 5.4 m/s2 in both the laden and unladen conditions.
 The combination performance shall be verified by calculations referring to the maximum braking performance actually achieved by the motor vehicle alone (laden)