Actively controlled suspension system with compensation of delay in phase in control system

An anti-rolling suspension control system for an automotive vehicle, comprising:

• a cylinder disposed between a vehicle body and a suspension member which rotatably supports a road wheel, said cylinder defining a variable pressure working chamber filled with a pressure medium for generating a damping force resisting against relative displacement between said vehicle body and said suspension member, a pressure of said pressure medium being variable between a predetermined maximum value and a predetermined minimum value across a predetermined neutral value;
• a pressure source circuit means connected to said working chamber for supplying said pressure medium and including a pressure source feeding pressurized medium through said circuit;
• a pressure control valve disposed between said pressure source and said working chamber, said pressure control valve being capable of varying valve positions between a first mode for increasing pressure of said pressure medium within said working chamber, a second mode for decreasing pressure in said pressure within said working source, and a third mode for maintaining said pressure in said pressure medium constant;
• a first lateral acceleration sensor for monitoring a lateral acceleration exerted on the first position of the vehicle body to cause vehicular attitude change and producing a first sensor signal indicative thereof;
• a second lateral acceleration sensor oriented at a second position which is longitudinally distanced from said first lateral acceleration sensor, for monitoring said lateral acceleration exerted on the second position of the vehicle body and producing a second sensor signal indicative thereof;
• and
• controller means for receiving said first and second sensor signals for deriving a suspension control signal for operating said pressure control valve at one of said first, second and third mode positions for regulating vehicular attitude on the basis of said first and second sensor signals.