A vehicle suspension system configured to utilize a compressed gas for operation of the vehicle suspension wherein the vehicle suspension system is operable in a first mode and a second mode. The vehicle suspension system includes a controller operably coupled to a compressor and a plurality of sensors. The compressor is coupled to a first input source and a second input source. The first input source is utilized in the first mode wherein the vehicle is in an environment that is above freezing. The second input source is utilized in an environment that is below freezing. An antifreeze introduction module is operably coupled to the second input source and is configured to provide introduction of an antifreeze compound into the second input source and subsequently the components of the vehicle suspension system. The vehicle suspension system further includes air springs, leveling valves being operably coupled by a network of lines.

A load estimation device includes: an air spring having a diaphragm that expands and contracts due to supply and exhaust of air, and configured to support a support body in a liftable manner; an auxiliary support portion configured to support the support body separately from the air spring; a displacement sensor configured to measure a length of the air spring; a pressure sensor configured to measure an internal pressure of the air spring; a temperature sensor disposed together with the air spring, and configured to measure a temperature of the air spring; and a calculation unit configured to calculate a spring load supported by the air spring based on measured results of the displacement sensor, the pressure sensor and the temperature sensor.

A suspension control system dynamically adjusts pistons located proximal to wheels of an agricultural machine to substantially equalize distribution of weight of the machine at each wheel and/or provide a substantially constant desired orientation of the machine above a ground surface thereby protecting laterally extending sprayer booms from contacting the ground. Articulation, pitch, roll and/or machine height can be determined from piston measurements on the machine to apply such height corrections. For sprayers, this allows controlling clearance and suspension height to maintain the boom parallel to the ground to prevent damage.

A method and a system are provided for adjusting a pressure of a medium to a target pressure. The method includes: providing a pneumatic structure in which the medium is at a medium pressure that is a starting pressure; providing an adsorptive material operable within a range of temperatures that is proportionate with a range of medium pressures at which the pneumatic structure is operable; and adjusting a temperature of the adsorptive material to effect an adjustment of the medium pressure to the target pressure for performing a selected function. The system performs the method and includes the absorptive material and at least one regulator for adjusting the temperature of the adsorptive material.

A dump truck pitching control system that can improve the ride quality of a vehicle body and the drive stability during traveling is provided. The present invention includes: a pitching state amount detection section 194 that detects a state amount of the pitching movement of the vehicle body 10; a spring characteristics calculation section 197 that calculates spring characteristics of suspension cylinders 30, based on detection results of stroke sensors 306, pressure sensors 307, and temperature sensors 308; a pitching target amount calculation section 192 that calculates a target amount of the pitching movement of the vehicle body 10, according to the spring characteristics calculated by the spring characteristics calculation section 197; and a torque correction value calculation section 193 that calculates a torque correction value required to correct the pitching amount, according to the spring characteristics calculated by the spring characteristics calculation section 197.

A vehicle-height control system is configured to control a vehicle height for a wheel. The vehicle-height control system includes: a vehicle-height control actuator provided so as to correspond to the wheel; a pressure-medium supply and discharge device configured to supply and discharge a pressure medium to and from the vehicle-height control actuator; and a vehicle height controller configured to control the vehicle height for the wheel by controlling the pressure-medium supply and discharge device based on an inside temperature and an outside-air temperature to control at least one of supply and discharge of the pressure medium to and from the vehicle-height control actuator. The inside temperature is a temperature in the vehicle-height control system.

In one aspect, a suspension control system is provided for dynamically adjusting pistons located proximal to wheels of an agricultural machine to substantially equalize distribution of weight of the machine at each wheel and/or provide a substantially constant desired orientation of the machine above a ground surface thereby protecting laterally extending sprayer booms from contacting the ground. Articulation, pitch, roll and/or machine height can be determined from piston measurements on the machine to apply such height corrections. For sprayers, this allows controlling clearance and suspension height to maintain the boom parallel to the ground to prevent damage.

A vehicle suspension arrangement includes mounting brackets configured to couple to a vehicle frame assembly, trailing arms coupled to the mounting brackets, a first axle member coupled to the trailing arms, an air spring arrangement coupled to the vehicle frame assembly and one of the trailing arms, and an air spring arrangement, wherein the first end, the second end and the air spring arrangement cooperate to define an interior space, a second axle member spaced from the first axle member, a sensor arrangement position within the interior space and configured to sense an operational parameter of the air spring arrangement, and a control arrangement operably coupled to the sensor arrangement and configured to receive information from the first sensor arrangement, wherein the control arrangement is configured to control at least one operational characteristic of the second axle member based upon the information received from the sensor arrangement.

A dump truck pitching control system that can improve the ride quality of a vehicle body and the drive stability during traveling is provided. The present invention includes: a pitching state amount detection section 194 that detects a state amount of the pitching movement of the vehicle body 10; a spring characteristics calculation section 197 that calculates spring characteristics of suspension cylinders 30, based on detection results of stroke sensors 306, pressure sensors 307, and temperature sensors 308; a pitching target amount calculation section 192 that calculates a target amount of the pitching movement of the vehicle body 10, according to the spring characteristics calculated by the spring characteristics calculation section 197; and a torque correction value calculation section 193 that calculates a torque correction value required to correct the pitching amount, according to the spring characteristics calculated by the spring characteristics calculation section 197.

A communication and power transmission module includes a communication connection portion adapted for communicative coupling with an associated controller. A wireless power and communication portion is adapted for communicative coupling with an associated sensing device operatively associated with an associated suspension component and/or an associated wheel. The wireless power and communication portion is operable to communicate wireless data and/or signals to and/or from the associated sensing device and operable to wirelessly transmit power to the associated sensing device. Gas spring assemblies and vehicles including one or more of such communication and power transmission modules are also included.