| 摘要 |
The motor 1 is substituted for the age-old rack-type steering rod and controls all the turning movements by rotation according to the principles of the mechanisms of the worm and/or screw bolt. Or by fitting the motor vertically which controls a system of gearing and/or the rack-type steering rod. The variation of the size of the turning angle of the front and rear wheels is obtained by use of a motor which is faster at the front than at the rear, or by fitting a speed varier, and/or by fitting gears of different gearing or different screw pitch for the front wheels and rear wheels. For one variant, the steering with motors for four steered wheels may be produced by fitting just one motor which controls a transmission shaft which controls the front and rear wheels. By adapting the principles of the mechanisms of the worm and screw bolt controlled by the same motor for the front and/or rear wheels. The fitting of clutches and/or brakes to all these systems gives a regulation of the controls with high accuracy. The front wheels provide the main steering function, the rear steering at low speed (up to 35 km/h) turns in the opposite direction to the front wheels. At higher speeds, to prevent an excessive reaction to centrifugal force, an electronic control for reversing the rotation of the rear motor takes place automatically and provides turning in the same direction as the front wheels. With electronic and/or fibre optic conductor control transmission systems and the control of the steering using motors at the front and/or at the rear a reduction in the transmission delay is obtained which gives the vehicle the greatest possible agility and homogeneity in driving. <IMAGE>
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