Document ID: chunk:federal_register_of_legislation:F2018L01515:body:0:p7
Version: federal_register_of_legislation:F2018L01515
Segment Type: other
Provision Reference: 
Character Range: 20563–23391

driver and which can continuously determine the possibility of a manoeuvre (e.g. lane change) and complete these manoeuvres for extended periods without further driver command/confirmation.
2.3.4.2. "Corrective Steering Function (CSF)" means a control function within an electronic control system whereby, for a limited duration, changes to the steering angle of one or more wheels may result from the automatic evaluation of signals initiated on-board the vehicle, in order:
(a) To compensate a sudden, unexpected change in the side force of the vehicle, or;
(b) To improve the vehicle stability (e.g. side wind, differing adhesion road conditions "μ-split"), or;
(c) To correct lane departure. (e.g. to avoid crossing lane markings, leaving the road).
2.3.5. "Steered wheels" means the wheels, the alignment of which may be altered directly or indirectly in relation to the longitudinal axis of the vehicle in order to determine the direction of movement of the vehicle. (The steered wheels include the axis around which they are rotated in order to determine the direction of movement of the vehicle);
2.3.6. "Energy supply" includes those parts of the steering equipment which provide it with energy, regulate that energy and where appropriate, process and store it. It also includes any storage reservoirs for the operating medium and the return lines, but not the vehicle's engine (except for the purpose of paragraph 5.3.2.1.) or its drive to the energy source.
2.3.6.1. "Energy source" means the part of the energy supply, which provides the energy in the required form.
2.3.6.2. "Energy reservoir" means that part of the energy supply in which the energy provided by the energy source is stored, for example, a pressurised fluid reservoir or vehicle battery.
2.3.6.3. "Storage reservoir" means that part of the energy supply in which the operating medium is stored at or near to the atmospheric pressure, for example a fluid reservoir.
2.4. Steering parameters
2.4.1. "Steering control effort" means the force applied to the steering control in order to steer the vehicle.
2.4.2. "Steering time" means the period of time from the beginning of the movement of the steering control to the moment at which the steered wheels have reached a specific steering angle.
2.4.3. "Steering angle" means the angle between the projection of a longitudinal axis of the vehicle and the line of intersection of the wheel plane (being the central plane of the wheel, normal to the axis around which it rotates) and the road surface.
2.4.4. "Steering forces" mean all the forces operating in the steering transmission.
2.4.5. "Mean steering ratio" means the ratio of the angular displacement of the steering control to the mean of the swept steering angle of the steered wheels for a full lock-to-lock turn.
2.4.6. "Turning circle" means