Abstract: A bushing, for use with a control arm, has first and second mating segments that can be mated and assembled to form a central portion to be received within a circular opening in the control arm and the central portion has an outer diameter corresponding to the diameter of the circular opening. Each segment includes a cap or head portion having a diameter dimensioned to abut against one of the surfaces of the control arm and has a central bore. A bushing sleeve has a length equal to a axial length of the assembled bushing and an outer diameter incrementally greater than the diameter of the central bore so that the sleeve can be press fit within the bore to immobilize the segments when they are in contact with the control arm and become resistant to separation.

Abstract: An electric actuator includes an electric motor 5, and a motion conversion mechanism 4 configured to convert a rotary motion of the electric motor 5 into a linear motion, in which the motion conversion mechanism 4 has a nut 17 rotatably supported, and a screw shaft 18 configured to axially move in accordance with a rotation of the nut 17, the electric actuator is provided with a case 20 covering an axial end surface 18b of the screw shaft 18, and the electric actuator is provided with an elastic member 30 between the axial end surface 18b of the screw shaft 18 and an opposite surface 20b of the case 20 facing the axial end surface 18b of the screw shaft 18.

Abstract: An adjustable ride height sensor relocation device that comprises a single unitary cam shaped element and is incorporated into the suspension system of a vehicle to control ride quality of the vehicle. A suspension system in a vehicle containing such an adjustable ride height sensor relocation device and a method of restoring original automotive equipment parameters for a suspension system of a vehicle.

Abstract: A bushing includes a cylindrical body and a flange extending from the cylindrical body. The cylindrical body has an inner face defining a bore. The flange includes an outer rim and a face extending radially between the bore and the outer rim. At least one groove is formed in the face. The at least one groove extends from a first end intersecting the bore to a second end adjacent the outer rim such that grease supplied to the bore of the bushing is able to flow through the at least one groove.

Abstract: An air suspension system of a commercial vehicle comprises an electronic control device with a level control valve device. A valve element is coupled to a drive element mechanically coupled to a vehicle wheel or axle. In a first relative position of the valve element and a counter valve element, a port for an air suspension bellow is blocked. In a second relative position, the port for the air suspension bellow is connected to a port for an aeration device. In a third relative position, the port for the air suspension bellow is connected to a port for a deaeration device. Control logic generates a control signal for an actuator which, when a level change is set by an operator, correspondingly changes the relative position of the valve element and the counter valve element or the relative position of the counter valve element and a valve housing.

Abstract: A method of detecting and identifying road surface defects is provided. Motion and position information is received from a plurality of vehicles. A profile is retrieved for a particular vehicle from a database of vehicle profiles by using an identifier of the particular vehicle. One or more criteria are identified for detecting a particular type of road surface defect based on the retrieved profile of the particular vehicle. Upon determining that the received motion and position data satisfies the identified criteria, a detection of a road surface defect of the particular type and a location associated with the detected road surface defect based on the received position information is reported.

Abstract: A latching assembly includes a lift housing extending along a center axis between a first and a second opened ends and defining a chamber extending therebetween. A support tube is disposed in the chamber and extends between a first and a second end. A moving member is disposed between the support tube and the lift housing for moving the lift housing between an extended position and a lowered position. The moving member includes an inner ring and an outer ring. The inner ring extends about the support tube. The outer ring is attached to the lift housing for translating an axial movement of the support tube into a rotational movement. A plurality of engagement members located between the inner ring and the outer ring for moving the inner ring and said outer ring axially along the center axis from the extended position to the lowered position.

Abstract: A concurrent leveling system includes a pressurized air source. A manifold block, having a body defining an air feed inlet, is disposed between air springs and the pressurized air source. The body includes front and rear suspension valves. Each of the suspension valves defines a suspension valve orifice having a first predetermined diameter. The body includes at least one restrictor valve parallel to and in fluid communication with the front suspension valves. The at least one restrictor valve includes a first check valve and a first blocker valve orifice defining a first orifice diameter. The first check valve and the first blocker valve orifice are disposed parallel to one another and in series with the front suspension valves and in fluid communication with the air feed inlet and the front suspension valves for reducing fluid back flow to allow the vehicle to be lowered in nominal loading conditions.

Abstract: A vehicle height adjusting device which adjusts vehicle height between a vehicle body and a lower arm, may include a suspension spring provided between the vehicle body and the lower arm; a variable portion provided inside an internal diameter of the suspension spring, and whose length is variable by converting a rotary driving motion around an axial direction into an axial rectilinear motion; and a power portion which is provided on the vehicle body, and rotates the variable portion.

Abstract: The present invention relates to an active suspension system allowing the force acting axis of a spring to be controlled, wherein a control means for the force acting axis of a spring is installed either between an upper seat plate and an upper arm, or between a lower seat plate and a lower arm so as to allow the wheel rate and vehicle height to be controlled by varying the force acting axis of the coil spring, and a manipulation unit capable of controlling the operation of the control means for the force acting axis of a spring is installed inside the vehicle. By varying the force acting axis of the coil spring, the present invention can significantly improve the marketability of the suspension system and reliability of the vehicle by varying the ride quality.

Abstract: A motor control device is provided with: an electric motor which drives an applying mechanism for applying torque to the wheels of a vehicle, and has three coils; a drive circuit that supplies current individually to the three coils; and a controller that controls the drive circuit on the basis of the operation amount of an operating member of the vehicle, and adjusts the output of the electric motor. When the vehicle is stopped, the controller executes swing control to periodically increase or decrease the rotary motion of the electric motor, even if the constant state of the operation amount is continued after the operation amount is constant, and the power generated by the applying mechanism and the power received by the applying mechanism are equalized and the rotary motion of the electric motor has stopped.

Abstract: System and method for observing the presence, location, movement and/or attitude of one or more objects to be monitored with a monitoring system, wherein sensors of the system are disposed in a part, such as on a floor, wall or ceiling, of the area to be monitored, and the system measures with sensors the area to be monitored, and determines the presence, location, movement and/or attitude of the object on the basis of the measurement results of the sensors. The system has a first mode and a second mode, and the system checks in the first mode the attitude and/or state of health of the object in the area to be monitored and functions in the second mode as an intruder alarm monitoring the area to be monitored.

Abstract: A vehicle suspension apparatus configured for adjusting vehicle height may include a fixing device disposed at a wheel side, provided on an internal peripheral surface along its perimeter with a plurality of fixing grooves; a moving device provided to be rotatable within the fixing device, formed along its perimeter with coupling grooves corresponding to the fixing grooves and coupled such that a shock absorber moves in an up and down direction; a driving device disposed at the fixing device to transmit power; and a drive shaft provided to be rotatable within the moving device and provided with a fixing pin inserted into the coupling groove of the moving device and the fixing groove of the fixing device such that the fixing pin is disengaged from the fixing groove and remains inserted only into the coupling groove when the drive shaft rotates.

Abstract: Systems and methods for determining a status of a vehicle suspension system are disclosed. A vertical acceleration of the vehicle relative to a road surface is determined based on a position of a vehicle body. Based on a predetermined period of time, a peak value that corresponds to the vertical acceleration is calculated. The peak value is compared to a target peak value and, when the peak value meets a preset criteria, a notification of potential suspension degradation is issued.

Abstract: A vehicle height adjustment device includes a changer, a vehicle height controller, and a malfunction detector. The changer is configured to change a relative position of a body of a vehicle relative to an axle of a wheel of the vehicle. The vehicle height controller is configured to change the relative position based on a detection value detected by a detector configured to detect the relative position so as to control a vehicle height, which is a height of the body. The malfunction detector is configured to detect a malfunction in at least one of the changer and the detector, the malfunction causing the vehicle height controller to continue to control the vehicle height to increase.

Abstract: A cleaning device, which includes a clean water tank, a water pump and a cleaning head. A water outlet of the clean water tank is connected with the water pump, and a water outlet of the water pump is connected with the cleaning head through an outlet pipe. The cleaning device further includes an outlet control switch and a one-way water hydraulic control valve. The outlet control switch is provided on the outlet pipe; a water inlet of the one-way water hydraulic control valve is connected with the outlet pipe, and a joint of the water inlet of the one-way water hydraulic control valve and the outlet pipe is disposed between the outlet control switch and the water pump; and a water outlet of the one-way water hydraulic control valve is communicated with a water inlet of the clean water tank.

Abstract: The internal combustion engine includes at least one cylinder, an exhaust gas tract having a measuring device, and a tank ventilation system having a purge air line, which provides pneumatic communication between the tank ventilation system and the cylinder. The purge air line has a sensor for ascertaining a hydrocarbon content of a gas flow from the tank ventilation system to the at least one cylinder. Fuel metering into the cylinder is controlled dependent on the ascertained hydrocarbon content. An exhaust gas characteristic of an exhaust gas flow that flows in the exhaust gas tract is detected by the measuring device and compared with a specified target value. If the ascertained difference between the detected exhaust gas characteristic and the specified target value exceeds a specified threshold, a test is carried out to determine whether the sensor has a malfunction.

Abstract: Disclosed is an automotive road construction machine, particularly a recycler or a cold stripping machine, comprising an engine frame that is supported by a chassis, a working roller which is stationarily or pivotally mounted on the engine frame and is used for machining a ground surface or road surface. The chassis is provided with wheels or tracked running gears which are connected to the engine frame via lifting column and are vertically adjustable relative to the engine frame. Each individually vertically adjustable lifting column is equipped with a device for measuring the actual vertical state of the lifting column.

Abstract: An air spring for a vehicle with a lifting function includes an upper rolling piston and a lower rolling piston disposed opposite to each other. A rolling bellows encloses a compressed air space and has double rolling folds. The pressure effective surfaces of the rolling folds are coordinated with each other in such a manner that, during dynamic spring operation of the air spring over a predetermined spring travel, the pressure effective surface of the rolling fold on the lower rolling piston is larger than the pressure effective surface of the rolling fold on the upper rolling piston.

Abstract: An aft suspension system for a pickup truck comprises four corner assemblies, where one corner assembly is located at a suspension position corresponding to each of the wheel corners for the vehicle. An air supply unit includes a reservoir, a compressor, and an ECU is fluidly connected to the corner assemblies. The air supply unit is capable of independently adjusting the corner assemblies from one another. The air suspension system is operable to place the corner assemblies in a unloading position or a trailer, which corresponds to two of the corner assemblies in raised positions and the other of the two corner assemblies located in lowered positions to create a maximum height differential between the front and rear corner assemblies.

Abstract: An assembly for supporting a vehicle chassis on a wheel of the vehicle includes a frame pivotably connected to the vehicle chassis at a connection location and a wheel attachment component slidingly coupled with the frame. The wheel attachment component is positioned on a first side of the connection location and is configured to pivot in unison with the frame and to move between a plurality of operating positions relative to the frame. A suspension component is positioned on a second side of the connection location opposite the attachment component and is operably interposed between the frame and the attachment component for regulating motion transfer between the frame and the attachment component, the suspension component. An adjustment actuator is rigidly coupled with the frame and is configured to shift the attachment component between any of the plurality of operating positions relative to the frame.

Abstract: A vibration isolator is provided comprising a base structure, a load structure and at least one vertical air gap formed by opposing and substantially parallel walls of the base structure and the load structure. The opposing walls being at least partly covered by respective arrays of permanent magnets, neighboring magnets in the arrays having alternating magnetization directions, an arrangement of the permanent magnets in the arrays being such that a gravitational force on the load structure is substantially compensated by a net magnetic force of the base structure on the load structure.

Abstract: A vehicle air suspension system includes one or more bellows assigned to an air spring of one or more vehicle axles. The bellows can be connected to a main pressure line and can be blocked off therefrom via a connecting line having a level control valve. The main line can be supplied with air via a supply line having a compressor and an air dryer, and can be vented via a vent line, which branches off between the compressor and the air dryer and has a discharge valve. A pressure reservoir can be connected to the main line and can be blocked off therefrom via a connecting line having a storage valve. To set different flow velocities when supplying and venting the bellows, the bellows of the air spring arranged on a vehicle axle or on a vehicle side is/are connected to the main line and blocked off therefrom via at least two parallel connecting lines, each having a level control valve.

Abstract: A method for determining distances for chassis measurement of a vehicle having a body and at least one wheel includes determining a center of rotation of a wheel of the vehicle by projecting a structured light pattern at least onto the wheel, recording a light pattern reflected by the wheel using a calibrated imaging sensor system, determining a 3D point cloud from the reflected light pattern, and determining the center of rotation of the wheel from the 3D point cloud. The method also includes determining a point on the body by evaluating the previously determined 3D point cloud or by evaluating a plurality of grey-scale images recorded under unstructured illumination. A height level is determined as a vertical distance between the center of rotation of the wheel and the point on the body.

Abstract: A hydraulic system for lowering the ride height of a vehicle includes at least one hydraulic shock mounted to the suspension of the vehicle. Each of the hydraulic shocks has a floating bearing in the hydraulic shock, and an inlet. The inlet is hydraulically connected to a central manifold that is adapted to move fluid into and out of the hydraulic shock for moving the floating bearing in each of the hydraulic shocks. When the floating bearing is moved in the hydraulic shock, the hydraulic shock shortens thereby lowering the ride height of the vehicle.

Abstract: A suspension assembly between a sprung element and an unsprung element includes a load-carrying spring element arranged in parallel with a negative stiffness element between the sprung element and the unsprung element. The negative stiffness element includes first and second opposed mutually-repelling elements.

Abstract: A lift kit for the suspension strut of a Quad ATV cycle including an upstanding sleeve with an upper edge with a collar of reduced diameter defining an upwardly facing annular shoulder at a bottom of the collar, a shock absorber inserted in the sleeve, a washer sitting on the annular shoulder and a coil spring sitting on the washer where the lift kit includes a sleeve member having a bottom collar and an upstanding portion therefrom where the bottom collar has an exterior surface with a diameter greater than that of the upstanding portion and a nut engaged onto the male screw thread on the and being movable to different set portions of a top surface of the nut along the male screw thread on the upstanding portion, the nut having an upper face supporting a bottom of the spring.

Abstract: A gas spring and gas damper assembly (1 10; 200; 400) can include a gas spring assembly (128; 202; 402) and a gas damper assembly (130; 204; 404). The gas spring assembly can include opposing end members (206, 208; 406, 408) and a flexible spring member (210; 410) secured there between that at least partially forms a spring chamber (212; 412). One of the end members (208; 408) can include an end member chamber (268; 468) that is separated into a plurality of damping chambers (292, 294; 492, 494). Damper pistons (300, 302; 500, 502) are disposed within the damping chambers (292, 294; 492, 494) and are connected to the other end member (206; 406) by way of a damping rod (276; 476).

Abstract: A lift kit for the suspension strut of a Quad ATV cycle including an upstanding sleeve with an upper edge with a collar of reduced diameter defining an upwardly facing annular shoulder at a bottom of the collar, a shock absorber inserted in the sleeve, a washer sitting on the annular shoulder and a coil spring sitting on the washer where the lift kit includes a sleeve member having a bottom collar and an upstanding portion therefrom where the bottom collar has an exterior surface with a diameter greater than that of the upstanding portion and a nut engaged onto the male screw thread on the and being movable to different set portions of a top surface of the nut along the male screw thread on the upstanding portion, the nut having an upper face supporting a bottom of the spring.

Abstract: The present invention relates to a vehicle provided with a sprung mass, including a vehicle frame, at least one axle provided with first and second ends, and a suspension system provided with a mechanical springs and leveling springs. The mechanical springs connect the axle ends to the frame and are provided with a spring rate in a rebound direction that is greater than or substantially equal to a spring rate in a jounce direction. The leveling springs are configured to support the sprung mass at one or more sprung mass load points, whereby the first and second mechanical springs may become substantially unloaded by the sprung mass of the vehicle at the one or more sprung mass load points.

Abstract: A system and method for modifying a ride height of a vehicle is disclosed. A vehicle lift system has a first suspension strut extension device, having an extension member fixed between an upper plate mount and a lower plate mount. The upper plate mount is secured to a top edge of the extension member at an angle relative to the lower plate mount such that the upper plate mount and the lower plate mount are not parallel. The extension member is angled in a first direction according to a first angle relative to the x-z plane. And the extension member is angled in a second direction according to a second angle relative to the y-z plane.

Abstract: A damper is provided with a vehicle height control unit including: a jack housing of a hydraulic jack provided at an upper end portion of a vehicle body side tube such that a plunger which defines a jack chamber is fitted on the jack housing so as to be movable up and down; a suspension spring provided between the plunger and a wheel side tube; and a pump housing provided in an upper end portion of a damper cylinder and forming a pump chamber in a hydraulic pump such that a pump pipe forming a part of a piston rod and communicating with an oil chamber in the damper cylinder is slidably inserted into the pump chamber.

Abstract: A suspension system includes spring bellows that are associated with pneumatic springs of vehicle axles, are connectable by lines having level control valves to a main pressure line, and can be shut off with respect thereto. The main line is connectable by valves alternately to a compressed air source and a sink, and can be shut of with respect thereto. To set different air mass flow rates when air is supplied to/removed from the bellows, the bellows of the springs at least on a vehicle axle or side can be connected to the main line in parallel with the connecting lines, at least by further connecting lines having further level control valves, and can be shut off with respect thereto. The further valves have nozzle cross-sectional surfaces the same size as the other level control valves. Chokes are downstream of the further valves in the ventilation direction, the cross-sectional surfaces thereof being smaller than the nozzle cross-sectional surfaces of the further valves.

Abstract: Disclosed is an automotive road construction machine, particularly a recycler or a cold stripping machine, comprising an engine frame that is supported by a chassis, a working roller which is stationarily or pivotally mounted on the engine frame and is used for machining a ground surface or road surface. The chassis is provided with wheels or tracked running gears which are connected to the engine frame via lifting column and are vertically adjustable relative to the engine frame. Each individually vertically adjustable lifting column is equipped with a device for measuring the actual vertical state of the lifting column.

Abstract: A machine includes a chassis, a plurality of ground engaging elements supporting the chassis above a ground surface, a motor for driving at least one of the ground engaging elements and a plurality of assemblies supporting the chassis on the ground engaging elements. Each of the assemblies is configured to selectively raise and lower the chassis relative to the ground surface and includes a first attachment component for attaching the assembly to one of the ground engaging elements, a second attachment component for attaching the assembly to the chassis, an adjustment component for shifting the first attachment component between a plurality of operating positions relative to the second attachment component. A control system allows an operator to remotely control the adjustment components of each of the assemblies.

Abstract: An assembly for supporting a vehicle chassis on a wheel of the vehicle includes a frame pivotably connected to the vehicle chassis at a connection location and a wheel attachment component slidingly coupled with the frame. The wheel attachment component is positioned on a first side of the connection location and is configured to pivot in unison with the frame and to move between a plurality of operating positions relative to the frame. A suspension component is positioned on a second side of the connection location opposite the attachment component and is operably interposed between the frame and the attachment component for regulating motion transfer between the frame and the attachment component, the suspension component. An adjustment actuator is rigidly coupled with the frame and is configured to shift the attachment component between any of the plurality of operating positions relative to the frame.

Abstract: An assembly for supporting a vehicle chassis on a ground engaging element of the vehicle includes a first attachment component for attaching the assembly to the ground engaging element, a second attachment component for attaching the assembly to the chassis and an adjustment component for shifting the first attachment component between a plurality of operating positions relative to the second attachment component. A suspension component is operably interposed between the first attachment component and the second attachment component is configured to regulate motion transfer between the first attachment component and the second attachment component. The suspension component functions independently of the operating position. A locking mechanism mechanically locks the assembly into any of the plurality of operating positions.

Abstract: An assembly for supporting a vehicle chassis on a wheel of the vehicle includes a wheel attachment component for attaching the assembly to the wheel, a chassis attachment component for attaching the assembly to the chassis, and a suspension component for regulating motion transfer between the wheel attachment component and the chassis attachment component. The chassis attachment component includes a hydraulic rotary actuator for attaching to the vehicle chassis and selectively pivoting the assembly relative to the chassis.

Abstract: A vehicle height control device comprises a vehicle height control unit including a jack housing of a hydraulic jack provided at an upper end portion of an inner tube, a suspension spring provided between an upper end of a hollow pipe and a plunger of the hydraulic jack, a pump housing provided at the plunger of the hydraulic jack and forming a pump chamber of a hydraulic pump, and a pump pipe communicating with an oil reservoir chamber on an inner periphery of the hollow pipe and slidably inserted into the pump chamber in the pump housing, and a selector valve controlling the vehicle height by adjusting the amount of hydraulic oil fed to a jack chamber in the hydraulic jack by the hydraulic pump that performs the pumping operation in conjunction with extending and contracting motion of the hollow pipe with respect to the inner tube.

Abstract: An air spring that can be used in an air suspension system includes a hollow piston, a hollow shaft and a body. The hollow piston has a hole through it. The hollow shaft has a shaft interior volume in communication with the hole in the piston. The body has a body interior volume in communication with the hole in the hollow piston. The hole in the hollow piston in communication with the shaft interior volume and the body interior volume provides a total interior volume. Wherein, the total interior volume is greater than the body interior volume thereby providing a linearized spring rate.

Abstract: A torsion key saddle enables a user to readily change the suspension performance characteristic and the suspension lift in a vehicle with independent torsion suspension without the need to replace the torsion keys. Use of torsion key saddles enables each wheel to be adjusted fully between the extremes available using the six possible positions for a torsion key with a hex torsion bar socket.

Abstract: A gas spring for a vehicle suspension system includes a cylinder, a rod disposed within the cylinder, a relative movement between the rod and the cylinder changing the volume of a chamber formed between the rod and the cylinder, and an accumulator in communication with the chamber. Compression of gas in the chamber at least partially provides a first spring rate for deflections of the gas spring below a threshold, compression of gas in the chamber at least partially provides a second spring rate for deflections of the gas spring above the threshold, and the first spring rate is greater than the second spring rate.

Abstract: A vehicle height adjusting device includes: a changing unit that changes relative positions of a vehicle main body and wheels of a vehicle; and a control unit that adjusts a vehicle height that is a height of the vehicle main body by controlling the changing unit to change the relative positions, in which the changing unit includes an electromagnetic valve that is provided on a circulation path of a fluid and that is adjusted to have an opening amount in accordance with supplied power and changes the relative positions as pressure of the fluid varies in accordance with the opening amount of the electromagnetic valve, and the control unit performs Pulse-Width-Modulation control on voltage applied to the electromagnetic valve so that the opening amount of the electromagnetic valve equals a desired opening amount.

Abstract: A warning system for a vehicle having an air suspension system can include an indicator, an event data recorder, and a controller. The controller can be configured to determine a load on a front axle and a rear axle when the vehicle is in a static condition and compare the determined load on the front and rear axles to a predetermined load threshold for each of the front and rear axles. A warning signal can be provided to the indicator indicative of at least one of the determined loads exceeding the corresponding predetermined load threshold upon the controller determining one of the determined loads exceeds the corresponding predetermined load threshold. Data indicative of at least one of the determined loads exceeding the corresponding predetermined threshold can be communicated to the event data recorder.

Abstract: A height control valve assembly having a housing with an air supply port, first and second ports, and an exhaust port. A valve positioned in the housing has a first surface in fluid communication with the air supply port and a second surface. The valve moves between first and second positions, in which the second surface sealingly engages a portion of the housing surrounding the first and second ports, respectively, to prevent fluid from flowing between the air supply port and the first and second ports, respectively. The valve is moveable from either of the first and second positions to a fill position, in which the air supply port is in fluid communication with one of the first and second ports, and an exhaust position, in which one of the first and second ports is in fluid communication with the exhaust port.

Abstract: An active air suspension system includes an air spring assembly that has a piston airbag and a primary airbag mounted around the piston airbag to provide a variable force and rate dual air spring configuration. The air suspension system is configured to accurately control pressure within the system in a closed-loop manner.

Abstract: A vehicle suspension system enables active control of pre-load, spring rate, and ride height by using a fluid damper housing defining an interior chamber containing an incompressible fluid and a hollow rod supporting a piston extending into the interior chamber. The housing is movable relative to the hollow rod such that fluid volume in the interior chamber varies. A multi-chambered manifold is operatively connected to the hollow rod and has a first gas chamber in fluid communication with a second gas chamber. A first plunger, a second plunger, and a third plunger are supported by the manifold. A first actuator is operable to move the third plunger to vary a volume of the first gas chamber between the first and third plungers. A second actuator is operable to move the second plunger to vary a volume of the second gas chamber in communication with the first gas chamber.

Abstract: The system includes: a first pair of hydraulic linear actuators between a vehicle body and a respective rear wheel such that extension and compression the actuators causes increase and a decrease, respectively, in the height of the body from the ground at the rear axle; a second pair of actuators between the body and a respective front wheel such that extension and compression of the actuators causes increase and a decrease, respectively, in the height of the vehicle body from the ground at the front axle; a supply unit for generating a flow of fluid under pressure; a tank; a hydraulic circuit connecting the pairs of actuators, supply unit, and tank; and a flow controller arranged to control the fluid between the pairs of actuators such that, during raising or lowering of the vehicle body, the height at the front axle is always less than that at the rear axle.

Abstract: A telescoping cylinder device including double-walled cylinders is disclosed. By way of a pressure medium, the cylinders are displaceable relative to each other by moving inside the space formed between the two walls. A central through hole extends axially through the cylinders and provide a passage for transmission. A vehicle including a plurality of telescoping cylinder devices is also disclosed.

Abstract: A modular control system is adapted to adjust an aftermarket system in a vehicle via the vehicle head unit. The head unit includes a user interface operable by the user to control the aftermarket system. An aftermarket control unit is in communication with the user interface of the vehicle head unit, the aftermarket control unit receiving an aftermarket control signal from the vehicle head unit as a results of an input by the user at the head unit. The aftermarket control unit is in communication with the aftermarket system, wherein the aftermarket control unit may operate the aftermarket system in response to the user input. The aftermarket system may be an air suspension system.