An air suspension system, comprising a manifold, defining a first and second port, each port defining a receiving region at the second end, wherein the first and second ports are arranged in a common plane, a channel intersecting the first and second port, a cavity intersecting each port, and a pressure sensor port, positioned between the first and second port, defining a sensor insertion axis normal to the common plane, the pressure sensor port separated from the first port, the second port, and the channel by a thickness; a first and second solenoid valve, each solenoid valve arranged within the cavity and coaxially arranged with the first and second ports, each solenoid valve comprising a connector; a pressure sensor arranged within the pressure sensor port, the pressure sensor comprising a connector; and an electronics module arranged parallel the common plane, the electronics module configured to electrically couple to the connectors.

An air suspension system includes a controller that controls opening/closing of normally-closed electromagnetic switching valves constituting a control valve, a first supply/discharge switching valve, a second supply/discharge switching valve, a first tank switching valve, and a second tank switching valve. The controller controls opening/closing of the electromagnetic switching valves in an order of first control, second control, and third control. In the first control, the control valve is opened. In the second control, the first supply/discharge switching valve and the second supply/discharge switching valve are opened in an opened state of the control valve. In the third control, the control valve, the first supply/discharge switching valve, and the second supply/discharge switching valve are closed.

Methods and systems are provided for an electric heavy-duty vehicle. In one example, a system for the vehicle may include a wheel hub assembly coupled to a frame of the vehicle via a first wishbone arm and a second wishbone arm, and an air spring coupled at opposite ends to a first link and a second link, each of the first link and the second link being pivotably coupled to the frame of the vehicle, the second link further being pivotably coupled to the first wishbone arm. The air spring may be positioned above the wheel hub assembly with respect to the vehicle.

Methods and systems are provided for an electric heavy-duty vehicle. In one example, a system for the vehicle may include a wheel hub assembly coupled to a frame of the vehicle via a first wishbone arm and a second wishbone arm, and an air spring coupled at opposite ends to a first link and a second link, each of the first link and the second link being pivotably coupled to the frame of the vehicle, the second link further being pivotably coupled to the first wishbone arm. The air spring may be positioned above the wheel hub assembly with respect to the vehicle.

A dryer circuit for a pneumatic regulating device of a vehicle, comprising an air dryer, and a first compressor, wherein the first compressor is designed to compress system air present in the pneumatic regulating device, wherein the air dryer, the first compressor and subsystems, which can be connected to the first compressor, of the pneumatic regulating device are arranged in such a way that, in the operating mode of a closed air supply, air delivered between the components of one of the subsystems by the first compressor is delivered so as to bypass the air dryer.

A method of controlling a suspension system of a vehicle includes identifying an amplitude and a frequency of at least one harmonic event in a topology of a surface to be traversed by the vehicle, and, with a controller, altering at least one response characteristic of at least one adjustable component of the suspension system based on at least one of the amplitude and frequency of the harmonic event. Systems and methods relate to controlling vehicle suspension systems.

A method of controlling a suspension system of a vehicle includes identifying an amplitude and a frequency of at least one harmonic event in a topology of a surface to be traversed by the vehicle, and, with a controller, altering at least one response characteristic of at least one adjustable component of the suspension system based on at least one of the amplitude and frequency of the harmonic event. Systems and methods relate to controlling vehicle suspension systems.

A weight estimation device for a vehicle includes a storage unit storing a weight calculation information indicating a correspondence between an internal pressure value of an air spring supporting a vehicle body and a vehicle height serving as a height of the vehicle body from a base, a measured value acquisition unit acquiring a measured internal pressure value and a measured vehicle height, an internal pressure value calculation unit calculating a corrected internal pressure value of the air spring by deducting or adding a corrected value from or to the measured internal pressure value in a case where the measured internal pressure value is greater or smaller than the internal pressure value of the weight calculation information which corresponds to the measured vehicle height, and a weight calculation unit calculating a weight of a supported body, including the vehicle body, based on the corrected internal pressure value.

A weight estimation device for a vehicle includes a storage unit storing a weight calculation information indicating a correspondence between an internal pressure value of an air spring supporting a vehicle body and a vehicle height serving as a height of the vehicle body from a base, a measured value acquisition unit acquiring a measured internal pressure value and a measured vehicle height, an internal pressure value calculation unit calculating a corrected internal pressure value of the air spring by deducting or adding a corrected value from or to the measured internal pressure value in a case where the measured internal pressure value is greater or smaller than the internal pressure value of the weight calculation information which corresponds to the measured vehicle height, and a weight calculation unit calculating a weight of a supported body, including the vehicle body, based on the corrected internal pressure value.

A suspension system for a traveling vehicle body is disclosed. The system includes a suspension reference position varying mechanism (18) for varying a reference position of a suspension stroke of the suspension mechanism (100), and a controller (35) configured to calculate an intermediate value from a maximal value corresponding to the maximal position of the suspension stroke and a minimal value corresponding to the minimal position of the suspension stroke, and to control the suspension reference position varying mechanism such that, when the calculated intermediate values deviates from a set target range, the intermediate value is displaced toward the target range. The controller (35) increases a control execution frequency for the suspension reference position varying mechanism (18) when the traveling speed of the vehicle body is low, and reduces the control execution frequency for the suspension reference position varying mechanism (18) when the traveling speed of the vehicle body is high.