Document ID: chunk:federal_register_of_legislation:F2018C00341:body:0:p44
Version: federal_register_of_legislation:F2018C00341
Segment Type: other
Provision Reference: 
Character Range: 126005–128795

pedal quickly according to Figure 2, simulating emergency braking so that BAS is activated and ABS is fully cycling.

        In order to activate BAS the brake pedal shall be applied as specified by the car manufacturer[5]/. It shall be demonstrated that the BAS activates under these conditions.

        After t = t0 + 0.8 s and until the vehicle has slowed down to a speed of 15 km/h, the brake pedal force shall be maintained in a corridor between FABS, upper and FABS, lower, where FABS, upper is 0.7 FABS and FABS, lower is 0.5 FABS.

        The requirements are also considered to be met if, after t = t0 + 0.8 s, the pedal force falls below FABS, lower provided the requirement of paragraph 4.3. is fulfilled.

       4.3. Data evaluation

        The presence of BAS 'B' is demonstrated if a mean deceleration (aBAS) of at least 0.85 ∙ aABS is maintained from the time when t = t0 + 0.8 s to the time when the vehicle speed has been reduced to 15 km/h.

       Figure 2
       Example of test 2 of a category "B" BAS system

Appendix 2 - Attachment 1

         The following is a modified form of Annex 9 – Appendix 1 of UNECE Regulation No. 13-H– UNIFORM PROVISIONS CONCERNING THE APPROVAL OF PASSENGER CARS WITH REGARD TO BRAKING, incorporating supplement 14 to the 00 series of amendments.

USE OF THE DYNAMIC STABILITY SIMULATION

The effectiveness of the electronic stability control system may be determined by computer simulation.

       1. USE OF THE SIMULATION

       1.1. The vehicle stability function shall be able to be demonstrated by the vehicle manufacturer to the 'Administrator' by simulating the dynamic manoeuvres of paragraph 5.9. of Appendix 2.

       1.2. The simulation shall be a means whereby the vehicle stability performance shall be demonstrated with:
            (a) The yaw rate, one second after completion of the Sine with Dwell steering input (time T0 + 1);
            (b) The yaw rate, 1.75 seconds after completion of the Sine with Dwell steering input;
            (c) The lateral displacement of the vehicle centre of gravity with respect to its initial straight path.

       1.3. The simulation shall be carried out with a validated modelling and simulation tool and using the dynamic manoeuvres of paragraph 5.9. of Appendix 2 under the test conditions of paragraph 4. of Appendix 2.

        The method by which the simulation tool is validated is given in Attachment 2 to this appendix.

     Appendix 2 - Attachment 2

         The following is a modified form of Annex 9 – Appendix 2 of UNECE Regulation No. 13-H– UNIFORM PROVISIONS CONCERNING THE APPROVAL OF PASSENGER CARS WITH REGARD TO BRAKING, incorporating supplement 14 to the 00 series of amendments.

     DYNAMIC STABILITY SIMULATION TOOL AND ITS VALIDATION