Document ID: chunk:federal_register_of_legislation:F2018C00341:body:0:p43
Version: federal_register_of_legislation:F2018C00341
Segment Type: other
Provision Reference: 
Character Range: 123413–126256

and threshold deceleration as shown in Figure 1. The values of FT and aT shall be supplied to the Technical Service or Test Facility. The value of aT shall be between 3.5 m/s² and 5.0 m/s².

       Figure 1a
       Pedal force characteristic needed in order to achieve maximum deceleration with category "A" BAS

       3.2.4. A straight line is drawn from the origin through the point FT, aT (as shown in Figure 1a). The value of brake pedal force "F", at the point of intersection between this line and a horizontal line defined by a=aABS, is defined
       as FABS, extrapolated:

       3.2.5. As an alternative, which can be selected by the manufacturer, in the case of vehicles of category N1, or M1 derived from those N1 vehicles, with a gross vehicle mass GVM > 2,500 kg, the pedal force figures for FT, FABS,min, FABS,max and FAB,extrapolated may be derived from the brake line pressure response characteristic instead of the vehicle deceleration characteristic. This shall be measured as the brake pedal force is increasing.

       3.2.5.1. The pressure, at which ABS cycling commences, shall be determined by making five tests from 100 ± 2 km/h in which the brake pedal is applied up to the level which produces ABS operation and the five pressures at which this occurs as determined from front wheel pressure records, shall be recorded and the mean value obtained as PABS.

       3.2.5.2. The threshold pressure PT shall be stated by the manufacturer and correspond to a deceleration in the range of 2.5 - 4.5 m/s2.

       3.2.5.3. Figure 1b shall be constructed in the manner set out in paragraph 3.2.4., but using line pressure measurements to define the parameters set out in paragraph 3.2.5. of this section where:

       Figure 1b
       Pedal force characteristic needed in order to achieve maximum deceleration with category "A" BAS
       3.3. Data evaluation

        The presence of a category "A" BAS is proven if

                where:

                and

       4. Assessment of the presence of a category "B" BAS

        A category "B" BAS shall meet the test requirements contained within paragraphs 4.1. and 4.2. of this section.

       4.1. Test 1: Reference test to determine FABS and aABS.

       4.1.1. The reference values FABS and aABS shall be determined in accordance with the procedure described in Attachment 4 to this appendix.

       4.2. Test 2: For activation of BAS

        The vehicle shall be driven in a straight line at the test speed specified in paragraph 2.4. of this section. The driver shall apply the brake 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