Steering (Steering operation): Description and operation (page 2 of 2)

The steering column contains a 2 piece collapsible steering shaft running in a ball bearing at its upper end and a bush at its base.

The steering column mountings are designed to deform and or move to absorb energy in the event of an impact. At its base, the clamp securing the column will allow it to slide when under load while at the upper end of the column, the bracket is retained by sliding capsules and absorbing plates. In the event of an impact, the column will move forward, down the sliding capsules and bending the absorbing plates which absorb energy as they deform. Additional protection to the driver’s face and upper torso is provided by the SRS airbag in the centre of the steering wheel. See RESTRAINT SYSTEMS, Information.

In the event of frontal impact, if the vehicle is exceeding a set speed, the airbag will inflate.

The upper end of the column is supported by a single bolt, held captive in the bracket by a locking plate. Releasing the column adjustment lever slackens the nut securing this bolt and allows movement along the slots in the support bracket thus providing adjustment of the column height.

When the steering wheel is moved, the turning effort of the shaft is transmitted to the pinion shaft of the steering rack by a universal joint. This joint allows for adjustments made to the column position and for the movement of the column in an impact.