System for vehicle body roll control utilizing steering angle detection

For a vehicle comprising a body and a plurality of wheels upon which it runs, a vehicle roll control system of vehicle height adjustment type, comprising:

• a plurality of actuator assemblies, one provided corresponding to each one of said vehicle wheels and resiliently suspending said one of said vehicle wheels from the vehicle body, said actuator assemblies comprising pressure chambers and each being adapted to increase or decrease vehicle height at a location corresponding to its corresponding vehicle wheel as respective results of supplying or discharging of working fluid to or from its said pressure chamber;
• a plurality of working fluid supplying and discharging means which are provided corresponding to said actuator assemblies and which serve to supply working fluid to said working fluid chambers and to discharge working fluid from said working fluid chambers;
• a plurality of vehicle height detection means which are provided corresponding to said vehicle wheels and which serve for sensing parameters representative of the heights Hi of the vehicle body over said vehicle wheels;
• a vehicle speed detecting means for sensing the road speed of the vehicle;
• a steering angle detecting means for sensing the steering angle of the vehicle;
• and:
• a means for computing and control, which computes the differences .DELTA.Hi between said vehicle heights Hi as sensed by said vehicle height detection means and reference vehicle heights, computes a steady state roll angle .phi..sub..infin. of the vehicle body from the vehicle speed sensed by said vehicle speed detecting means and the steering angle sensed by said steering angle detecting means, and computes a difference value .phi. based thereon, said computing control means being adapted to control said working fluid supplying and discharging means according to said difference value .phi. when the absolute value of said difference value .phi. is larger than a determinate value .phi..sub.o, and to control said working fluid supplying and discharging means according to according to said vehicle height differences Hi so as to thereby adjust the absolute values of said vehicle height differences to be not more than a determinate value .DELTA.Ho, when the absolute value of said difference value .phi. is not larger than said determinate value .phi..sub.o.