Document ID: chunk:federal_register_of_legislation:F2018C00341:body:0:p29
Version: federal_register_of_legislation:F2018C00341
Segment Type: other
Provision Reference: 
Character Range: 85976–89149

means to modify propulsion torque, as necessary, to assist the driver in maintaining control of the vehicle.
       0.8.                           "Lateral acceleration" means the component of the acceleration vector of a point in the vehicle perpendicular to the vehicle x axis (longitudinal) and parallel to the road plane.
       0.9.                           "Oversteer" means a condition in which the vehicle's yaw rate is greater than the yaw rate that would occur at the vehicle's speed as a result of the Ackerman steer angle.
       0.10.                      "Side-slip or side-slip angle" means the arctangent of the ratio of the lateral velocity to the longitudinal velocity of the centre of gravity of the vehicle.
       0.11.                      "Understeer" means a condition in which the vehicle's yaw rate is less than the yaw rate that would occur at the vehicle's speed as a result of the Ackerman steer angle.
       0.12.                      "Yaw rate" means the rate of change of the vehicle's heading angle measured in degrees/second of rotation about a vertical axis through the vehicle's centre of gravity.
       0.13.                      "Peak braking coefficient (PBC)": means the measure of tyre to road surface friction based on the maximum deceleration of a rolling tyre.
       0.14.                      "Common space" means an area on which more than one tell-tale, indicator, identification symbol, or other message may be displayed but not simultaneously.
       0.15.                      "Static stability factor" means one-half the track width of a vehicle divided by the height of its center of gravity, also expressed as SSF = T/2H, where: T = track width (for vehicles with more than one track width the average is used; for axles with dual wheels, the outer wheels are used when calculating "T") and H = height of the center of gravity of the vehicle.
       0.16.                      "Brake Assist System (BAS)" means a function of the braking system that deduces an emergency braking event from a characteristic of the driver's brake demand and, under such conditions:
       (a) Assists the driver to deliver the maximum achievable braking rate; or
       (b) Is sufficient to cause full cycling of the Anti-lock Braking System.
       0.16.1.                "Category A Brake Assist System" means a system which detects an emergency braking condition based primarily[2]/ on the brake pedal force applied by the driver.
       0.16.2.                "Category B Brake Assist System" means a system which detects an emergency braking condition based primarily2/ on the brake pedal speed applied by the driver.

       A. Requirements for electronic stability control systems

        1. GENERAL Requirements

       1.1.                           Every ESC system must comply with the definition of paragraph 0.2 of this appendix and shall meet the equipment, performance and test requirements contained in this appendix.

       1.2.                           Vehicles equipped with an ESC system shall meet the functional requirements specified in paragraph 2. and the performance requirements in paragraph 3. under the