Various embodiments of the present disclosure provide a ride height sensing system that includes an encoded electromagnetic source as an input unit for a Hall Effect sensors and the signal from the electromagnet is encoded to enable the rejection of ambient magnetic field. In various embodiments, the ride height sensing system includes a self-calibration system including at least one Hall effect sensor mounted at a fixed distance and orientation with respect to the electromagnetic source to provide for continuous calibration of the system. In one embodiment, the enhanced ride height sensing system includes at least two inertial measurement units, such as accelerometers mounted to each of the body frame of the vehicle and the axle frame of the vehicle. This enables the system to optimize power usage by more accurately and efficiently measuring the ride height at high frequency rates with relatively lower power consumption.

A vibration damping control apparatus for a vehicle executes preview vibration damping control while obtaining, from preview reference data, a road surface displacement related value relating to a vertical displacement of a road surface at a predicted passage position of a wheel of the vehicle. In the preview reference data, relationships are established among the road surface displacement related value obtained when a measurement vehicle actually traveled on the road surface, position information representing the position of a wheel of the measurement vehicle when the road surface displacement related value was obtained, and speed information representing the speed of the measurement vehicle when the road surface displacement related value was obtained or representing a speed range in which the speed of the measurement vehicle is contained.

The invention relates to a method for compensating for vertically oriented movements of a superstructure of a vehicle. The vehicle is provided with the superstructure and with an active undercarriage having a plurality of wheel which are in contact with the carriageway, wherein each wheel is connected via an actuator adjustable over its length at a wheel assigned to a suspension point with the superstructure. Vertically oriented movements of the superstructure are caused by an inclination of the carriageway and by unevennesses of the carriageway, a first change of the length of at least one actuator is carried out for frequencies in a first, lower frequency range, and a second change of the length of the at least one actuator is carried out for frequencies in a second, higher frequency range.

A regenerative shock absorber that includes a housing and a piston that moves at least partially through the housing when the shock is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor, in turn, drives an electric generator that produced electric energy. The electric energy may be provided to a vehicle, among other things. The regenerative shock absorber may also provide ride performance that comparable to or exceeds that of conventional shock absorbers.

A bidirectional vehicle may be capable of traveling in either of two directions and may change its direction of travel at any point for various reasons. In response to a change in the direction of travel, systems of a bidirectional vehicle may adjust one or more suspension components using various techniques to configure the vehicle with a higher ride frequency at the trailing axle than at the leading axle to enhance the ride quality and handling capabilities of the vehicle.

In a method for controlling at least one component of a chassis of a vehicle, a parameterization of a reactive controller of the at least one component of the chassis is changed depending on a current certainty of sensor data of a roadway section to be driven detected by a sensor system, such that, when driving on the roadway section, in the case of increased uncertainty of the sensor data, the reactive controller controls with a lower reaction time with respect to a normal operation.

A regenerative shock absorber that include a housing and a piston that moves at least partially through the housing when the shock is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor, in turn, drives an electric generator that produced electric energy. The electric energy may be provided to a vehicle, among other things. The regenerative shock absorber may also provide ride performance that comparable to or exceeds that of conventional shock absorbers.

A damper control system includes a controller configured to estimate a temperature of a damper fluid based on data relating to heat added to and heat removed from the fluid. At least one damper is operatively coupled to the controller, and the controller is configured to control a size of a damper flow path of the at least one damper based on the estimated temperature. Methods relate to controlling at least one damper based on an estimated temperature of a damper fluid.

A signal level detection device 1 and a signal level detection method according to a means for solving a problem of the present invention varies a cut-off frequency c, of a variable low-pass filter 3 which filters a signal level r. The cut-off frequency c is varied based on the signal level r or information referred to for estimating the signal level. The signal level detection device 1 and the signal level detection method therefore reduce a delay of a rise of the obtained signal level r from an actual signal level, and sufficiently remove noise superimposed on the signal level r even when the signal level r is extremely low. Accordingly, control performance improves regardless of a degree of the signal level r.

A damper speed calculation unit 42 reads a suspension displacement and performs a differential operation on it, to thereby calculate a damper speed. This differential operating characteristic includes a gain characteristic having a gradient larger than a gradient of a gain characteristic of an exact differential in an unsprung resonance frequency region. With this, the phase delay is suppressed and the control performance is enhanced.