Traduction de «Steering axis » (Anglais → Français) :

where L is the semi-trailer's width, the wheelbase being measured for the purpose of this section as the distance of the axis of the semi-trailer fifth wheel king-pin to the centre line of the non-steering bogie axles; if one or more of the non-steering bogie axles has an axle lift device (see 2.14), then the wheelbase with lowered/lifted axle(s), whichever is the longer, is taken into account.

It also includes any storage reservoirs for the operating medium and the return lines, but not the vehicle's engine (except for the purposes of item 4.1.3) or its drive to the energy source; 1.3.4.1. Energy source means that part of the energy supply which provides the energy in the required form e.g. hydraulic pump, air compressor; 1.3.4.2. Energy reservoir means that part of the energy supply in which the energy provided by the energy source is stored; 1.3.4.3. Storage reservoir means that part of the energy supply in which the operating medium is stored at or near to the atmospheric pressure. 1.4. Steering parameters 1.4.1. Steerin ...[+++]g control effort means the force applied to the steering control in order to steer the vehicle; 1.4.2. 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; 1.4.3. Steering angle means the angle between the projection of a longitudinal axis of the vehicle and the line of intersection of the wheelplane (being the central plane of the tyre, normal to the spin axis of the wheel) and the road surface; 1.4.4. Steering forces mean all the forces operating in the steering transmission; 1.4.5 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; 1.4.6. Turning circle means the circle within which are located the projections onto the ground plane of all the points of the vehicle, excluding the external mirrors and the front direction indicators, when the vehicle is driven in a circle; 1.4.7. Nominal radius of steering control means in the case of a steering wheel the shortest dimension from its centre of rotation to the outer edge of the rim. In the case of any other form of control, it means the distance between its centre of rotation and the point at which the steering effort is applied. ...

1.5.2. For trailers 1.5.2.1. Self-tracking equipment see item 1.5.1.4 above. 1.5.2.2. Articulated steering equipment in which the steering forces are produced by a change in direction of the towing vehicle and in which the movement of the steered trailer wheels is firmly linked to the relative angle between the longitudinal axis of the towing vehicle and that of the trailer; 1.5.2.3. Self-steering equipment in which the steering forces are produced by a change in direction of the towing vehicle and in which the movement of the steere ...[+++]d trailer wheels is firmly linked to the relative angle between the longitudinal axis of the trailer frame or a load replacing it and the longitudinal axis of the sub-frame to which the axle(s) is (are) attached.

For steering equipment in which the steering forces are provided solely or partly by the muscular effort of the driver the steering control includes all parts up to the point where the steering effort is transformed by mechanical, hydraulic or electrical means; 1.3.2. Steering transmission includes all parts of the steering equipment which are the means of transmitting the steering forces between the steering control and the steered wheels; it includes all parts down from the point where the steering control effort is transformed by mechanical, hydraulic or electrical means; 1.3.3. Steered wheels means the wheels the alignment of which may be altered dire ...[+++]ctly or indirectly in relation to the longitudinal axis 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); 1.3.4. Energy supply includes those parts of the steering equipment which provide it with energy, control the energy and where appropriate, process and store it.

To determine the rearward and upward movement of the steering control, a recording (; ) shall be made, during the collision, of the variation in the distance - measured horizontally (2) and parallel to the longitudinal axis of the vehicle and, vertically, in the direction perpendicular to that axis - between the top of the steering column (and shaft) and a point on the vehicle which is not affected by the impact.