Four wheel steer control system for four wheel drive vehicle, responsive to driving torque distribution

A vehicle comprising:

• a four wheel drive system having a transfer for distributing a driving torque between a front wheel pair and a rear wheel pair, said transfer having means for varying a driving torque distribution between said front and rear wheel pairs,
• a four wheel steer system for steering both of said front and rear wheel pairs, said four wheel steer system having means for steering said rear wheel pair in response to a control signal,
• means for sensing said driving torque distribution, and
• controlling means for varying a rear wheel steering ratio of a rear wheel steer angle to a steering wheel angle in accordance with said driving torque distribution sensed by said driving torque distribution sensing means in such a manner as to maintain a steer characteristic of said vehicle substantially unchanged irrespective of change in said driving torque distribution, by manipulating said control signal.