Document ID: chunk:federal_register_of_legislation:F2021C00476:body:0:p48
Version: federal_register_of_legislation:F2021C00476
Segment Type: other
Provision Reference: 
Character Range: 133732–136385

with anti-lock systems of categories 1 or 2.  In the case of vehicles equipped with category 3 anti-lock systems, only the axle(s) with at least one directly controlled wheel must satisfy this requirement.

           5.2.5.   The condition   0.75 shall be checked with the vehicle both laden and unladen. 7/

              The laden test on the high adhesion surface may be omitted if the prescribed force on the control device does not achieve full cycling of the anti-lock system.

              For the unladen test, the control force may be increased up to 100 daN if no cycling is achieved with its full force value 8/.  If 100 daN is insufficient to make the system cycle, then this test may be omitted.

           5.3.   Additional checks

              The following additional checks shall be carried out with the engine disconnected, with the vehicle laden and unladen:

           5.3.1.   The wheels directly controlled by an anti-lock system must not lock when the full force 8/ is suddenly applied on the control device, on the road surfaces specified in paragraph 5.2.2. of this annex, at an initial speed of v = 40 km/h and at a high initial speed v = 0.8 vmax   120 km/h; 9/

           5.3.2.   When an axle passes from a high-adhesion surface (kH) to a low-adhesion surface (kL), where kH  0.5 and kH / kL  2, 10/ with the full force 8/ applied on the control device, the directly controlled wheels must not lock.  The running speed and the instant of applying the brakes shall be so calculated that, with the anti-lock system fully cycling on the high-adhesion surface, the passage from one surface to the other is made at high and at low speed, under the conditions laid down in paragraph 5.3.1.; 9/

           5.3.3.   When a vehicle passes from a low-adhesion surface (kL) to a high-adhesion surface (kH) where kH  0.5 and kH / kL  2, 10/ with the full force 8/ applied on the control device, the deceleration of the vehicle must rise to the appropriate high value within a reasonable time and the vehicle must not deviate from its initial course.  The running speed and the instant of applying the brake shall be so calculated that, with the anti-lock system fully cycling on the low-adhesion surface, the passage from one surface to the other occurs at approximately 50 km/h;

           5.3.4.   The provisions of this paragraph shall only apply to vehicles equipped with anti-lock systems of categories 1 or 2.  When the right and left wheels of the vehicle are situated on surfaces with differing coefficients of adhesion (kH and kL), where kH  0.5 and kH / kL  2, 10/ the directly controlled wheels must not lock