Document ID: chunk:federal_register_of_legislation:F2021C00476:body:0:p36
Version: federal_register_of_legislation:F2021C00476
Segment Type: other
Provision Reference: 
Character Range: 100623–103567

engine disconnected from an initial vehicle speed of 100 km/h and a force applied to the service brake control not less than 6.5 daN and not exceeding 50 daN.

         2.2.2.  The secondary braking system must give a stopping distance not exceeding the following value:

0.1 v + 0.0158 v2 (m)

         and a mean fully developed deceleration not less than 2.44 m/s2 (corresponding to the second term of the above formula).

         2.2.3.  The secondary braking effectiveness test shall be conducted by simulating the actual failure conditions in the service braking system.

         2.2.4. For vehicles employing electric regenerative braking systems, the braking performance shall additionally be checked under the two following failure conditions:

         2.2.4.1.               For a total failure of the electric component of the service braking output.

         2.2.4.2. In the case where the failure condition causes the electric component to deliver its maximum braking force.

         2.3.  Parking braking system

         2.3.1.  The parking braking system must be capable of holding the laden vehicle stationary on a 20 per cent up or down gradient.

         2.3.2.  On vehicles to which the coupling of a trailer is authorized, the parking braking system of the motor vehicle must be capable of holding the combination of vehicles stationary on a 12 per cent up or down gradient.

         2.3.3.  If the control device is manual, the force applied to it must not exceed 40 daN.

         2.3.4.  If it is a foot control device, the force exerted on the control must not exceed 50 daN.

         2.3.5.  A parking braking system which has to be actuated several times before it attains the prescribed performance is admissible.

         2.3.6.  To check compliance with the requirement specified in paragraph 5.2.2.4. of this Regulation, a Type-0 test must be carried out, with the engine disconnected, at an initial test speed of 30 km/h.  The mean fully developed deceleration on application of the control of the parking brake system and the deceleration immediately before the vehicle stops, shall not be less than 1.5 m/s2.  The test shall be carried out with the laden vehicle.  The force exerted on the braking control device shall not exceed the specified values.

         3.  RESPONSE TIME

         3.1.  Where a vehicle is equipped with a service braking system which is totally or partially dependent on a source of energy other than the muscular effort of the driver, the following requirements must be satisfied:

         3.1.1.  in an emergency manoeuvre, the time elapsing between the moment when the control device begins to be actuated and the moment when the braking force on the least favourable placed axle reaches the level corresponding to the prescribed performance must not exceed 0.6 seconds;

         3.1.2.  in the case of vehicles fitted with hydraulic braking systems, the requirements of