Abstract: An automotive vehicle suspension system includes a respective gas leveler (42) at each of multiple wheels. A compressor (12) and reservoir (46) serve the gas levelers. The compressor has an internal gas compressing mechanism (26) for charging the reservoir, an internal electric-operated exhaust valve (20), and a port (30) through which the gas compressing mechanism and the exhaust valve communicate with the reservoir and gas levelers. A respective branch (32, 34, 36, 38, 40) from each gas leveler and the reservoir to the compressor port contains a respective electric-operated valve (44, 48) in series with the respective gas leveler and reservoir. An electric pressure sensor (50) provides an actual pressure measurement within a range of pressures at a node that is common to the branches and to the compressor port. Apparent hoisting or jacking of the vehicle is detected (FIG.

Abstract: A method of controlling a vehicle active tilt control system is provided for increasing the operating efficiency and improving operator/passenger comfort associated with the operation of a motor vehicle having an active tilt control system. The tilt control system includes a stabilizer bar adjustable by a hydraulic actuator which is movable in first and second opposing directions for adjusting vehicle body roll resistance provided by the stabilizer bar, and having a pressure control valve for controlling hydraulic pressure to the actuators.

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.