Document ID: chunk:federal_register_of_legislation:F2021C00433:body:0:p16
Version: federal_register_of_legislation:F2021C00433
Segment Type: other
Provision Reference: 
Character Range: 46354–49405

test, if all the parameters specified in Table 1 (Item 4) are met in at least one test within a number of tests that must not exceed 6.

7.4.2.                              Where the secondary brake is applied by the service brake 'Control', the vehicle must be deemed to satisfy the requirements of this test if all the parameters specified in Table 1 (Item 4) are met in at least one test within a number of tests that must not exceed 6 for each single failure of a fluid system, including where appropriate:

7.4.2.1.                        each sub-system of a 'Split Service Brake System'; and

7.4.2.2.                        failure of energy assistance in a 'Brake Power Assist Unit'

7.5.                                    Lightly Laden Partial Failure Test .

7.5.1.                              The requirements of this clause only applies to a vehicle fitted with a brake system where the secondary brake is applied by the service brake 'Control'.   The vehicle will be deemed to satisfy the requirements of this test if all the parameters specified in Table 1 (Item 5) are met in at least one deceleration mode within a number of deceleration modes which must not exceed 6 for each single type of partial failure, including:

7.5.1.1.                        inoperative 'Antilock System'; and

7.5.1.2.                        inoperative 'Variable Proportioning Brake System'.

7.5.2.                              One single failure must be induced prior to each set of deceleration modes and the vehicle must be restored at the completion of each set.

7.6.                                    Service Brake Laden Effectiveness Test

           A series of tests must be conducted in the manner described in Table 1 (Item 6).                The vehicle will be deemed to satisfy the requirements of this test, if all the parameters specified are met on at least one test within a number of tests that must not exceed 6.

7.7.                                    Laden Secondary Brake Test

           The test procedure and determination of compliance must be as specified in clause 7.4, except that the vehicle must be at 'Maximum Loaded Test Mass 35/...' and the test parameters to be achieved are as described in Table 1 (Item 7).

7.8.                                    Laden Partial Failure Test

           The test procedure and determination of compliance must be as specified in clause 7.5, except that the vehicle must be at 'Maximum Loaded Test Mass 35/...' and the test parameters to be achieved are as described in Table 1 (Item 8).

7.9.                                    Service Brake Fade Test

7.9.1.                              In the case of vehicles in categories MB, MC, MD and NA, 15 successive deceleration tests must be conducted at intervals no greater than 55 seconds apart, such that for an initial speed V1 and a final speed V2 (km/h)

       (V12 - V2 2 )  > 7,500.

7.9.2.                              In the case of vehicles in categories ME, NB and NC, 20 successive deceleration tests must be