Abstract: A method of enhancing vehicle stability and response in a vehicle having an active roll control system with front and rear suspensions each including an anti-roll bar, and the control system including a hydraulic system for providing an anti-roll moment which acts on the vehicle by means of hydraulic cylinders connected to the anti-roll bars, includes the following steps: a) determining the vehicle speed; b) determining the steering wheel angle; c) calculating the desired vehicle yaw rate based upon the determined speed and steering wheel angle; d) sensing the actual yaw rate; e) comparing the desired yaw rate to the actual yaw rate; f) increasing the percentage of the anti-roll moment provided to the rear anti-roll bar if the actual yaw rate is less than the desired yaw rate, thereby decreasing understeer, increasing yaw rate, and enhancing vehicle response; and g) increasing the percentage of the anti-roll moment provided to the front anti-roll bar if the actual yaw rate is greater than the desired yaw rate

Abstract: A method is provided for improving response time in a vehicle active tilt control system having front and rear stabilizer bars adjustable by front and rear hydraulic actuators which are movable in first and second opposing directions for adjusting vehicle body roll resistance provided by the stabilizer bars, and having a pressure control valve for controlling hydraulic pressure to the actuators.

Abstract: A flow priority valve receives input fluid flow and divides the fluid flow between a primary device and a secondary device. The valve comprises a valve body have a bore formed therein, the bore having first and second ends and first and second annular channels formed in communication with the bore. The valve body further includes an input flow channel formed in communication with the bore for receiving the input fluid flow. A spool is movable within the bore and has a first land and a second land adjacent opposing ends of the spool. A spring is positioned within the bore for biasing the spool towards the first end of the bore. An electronically variable orifice (EVO) for electronically adjusting flow includes an EVO input portion in fluid communication with both the first annular channel and the first end of the bore, and an EVO output portion in fluid communication with both the second end of the bore and the primary device. The second annular channel is in fluid communication with the secondary device.