Document ID: chunk:federal_register_of_legislation:F2018C00341:body:0:p41
Version: federal_register_of_legislation:F2018C00341
Segment Type: other
Provision Reference: 
Character Range: 117856–121111

Determine lateral displacement by integrating zeroed lateral velocity.  Zero lateral displacement at the BOS point.  The lateral displacement measurement is made at 1.07 seconds after BOS point and is determined by interpolation.

       B. Requirements for BRAKE assist systems

 1.                              GENERAL Requirements

       Every BAS system must comply with the definition of paragraph 0.16 of this appendix and shall meet the performance and test requirements contained in this appendix.

       1.1. General performance characteristics for category "A" BAS systems

        When an emergency condition has been sensed by a relative high pedal force, the additional pedal force to cause full cycling of the ABS shall be reduced compared to the pedal force required without the BAS system in operation.

        Compliance with this requirement is demonstrated if the provisions of paragraphs 3.1. to 3.3. of this section are met.

       1.2. General performance characteristics for category "B" BAS systems

        When an emergency condition has been sensed, at least by a very fast application of the pedal, the BAS system shall raise the pressure to deliver the maximum achievable braking rate or cause full cycling of the ABS.

        Compliance with this requirement is demonstrated if the provisions of paragraphs 4.1. to 4.3. of this section are met.

       2. General test requirements

       2.1. Variables

        Whilst performing the tests described in part B of this appendix, the following variables shall be measured:

       2.1.1. Brake pedal force, Fp ;

       2.1.2. Vehicle velocity, vx ;

       2.1.3. Vehicle deceleration, ax ;

       2.1.4. Brake temperature, Td ;

       2.1.5. Brake pressure, P, where applicable;

       2.1.6 Brake pedal speed, vp, measured at the centre of the pedal plate or at a position on the pedal mechanism where the displacement is proportional to the displacement at the centre of the pedal plate allowing simple calibration of the measurement.

       2.2. Measuring equipment

       2.2.1. The variables listed in paragraph 2.1. of this section shall be measured by means of appropriate transducers. Accuracy, operating ranges, filtering techniques, data processing and other requirements are described in ISO Standard 15037-1: 2006.

       2.2.2. Accuracy of pedal force and disc temperature measurements shall be as follows:

Variable range system  Typical operating range of the transducers  Recommended maximum recording errors
Pedal force            0 to 2,000 N                                ±10 N

Brake temperature      0 – 1,000 °C                                ±5 °C

Brake pressure*        0 – 20 MPa*                                 ±100 kPa*

              *  Applicable as specified in paragraph 3.2.5.

       2.2.3. Details on analogue and digital data processing of the BAS test procedures are described in Attachment 5 to this appendix. A sampling rate for data acquisition of at least 500 Hz is required.

       2.2.4. Alternative measuring methods to those referred to in paragraph 2.2.3. may be allowed, provided they demonstrate at least an equivalent level of precision.

       2.3. Test conditions

       2.3.1. Test