Document ID: chunk:federal_register_of_legislation:F2010C00150:front:0:p34
Version: federal_register_of_legislation:F2010C00150
Segment Type: other
Provision Reference: 
Character Range: 91835–94710

are defined in paragraph 2. of this annex.

         (h) Plot f1 and f2 as a function of z, for both laden and unladen load conditions. These are the adhesion utilisation curves for the vehicle, which must satisfy the requirements in paragraph 5.2. (a) (ii) of this annex (or, in the case of Conformity of Production checks, these curves must satisfy the requirements in paragraph  6.2. of this annex) .

Annex 6

TEST REQUIREMENTS FOR VEHICLES FITTED WITH ANTI-LOCK SYSTEMS

1. GENERAL

         1.1. This annex defines the required braking performance for road vehicles fitted with anti- lock systems.

         1.2. The anti-lock systems known at present comprise a sensor or sensors, a controller or controllers and a modulator or modulators. Any device of a different design which may be introduced in the future, or where an anti-lock braking function is integrated into another system, shall be deemed to be an anti-lock braking system within the meaning of this annex and annex 5 to this Regulation, if it provides performance equal to that prescribed by this annex.

2. DEFINITIONS

         2.1. An "anti-lock system" is a part of a service braking system which automatically controls the degree of slip, in the direction of rotation of the wheel(s), on one or more wheels of the vehicle during braking,

         2.2. "Sensor" means a component designed to identify and transmit to the controller the conditions of rotation of the wheel(s) or the dynamic conditions of the vehicle.

         2.3. "Controller" means a component designed to evaluate the data transmitted by the sensor(s) and to transmit a signal to the modulator.

         2.4. "Modulator" means a component designed to vary the braking force(s) in accordance with the signal received from the controller .

         2.5. "Directly controlled wheel" means a wheel whose braking force is modulated according to data provided at least by its own sensor. [1/]

         2.6. "Indirectly controlled wheel" means a wheel whose braking force is modulated according to data provided by the sensor(s) of other wheel(s) . 1/

         2.7. "Full cycling" means that the anti-lock system is repeatedly modulating the brake force to prevent the directly controlled wheels from locking.  Brake applications where modulation only occurs once during the stop shall not be considered to meet this definition.

3. TYPES OF ANTI-LOCK SYSTEMS

         3.1. A vehicle is deemed to be equipped with an anti-lock system within the meaning of paragraph 1. of annex 5 to this Regulation, if one of the following systems is fitted:

3.1.1. Category 1 anti-lock system

          A vehicle equipped with a category 1 anti-lock system shall meet all the requirements of this annex.

3.1.2. Category 2 anti-lock system

          A vehicle equipped with a category 2 anti-lock system shall meet all the requirements of this