A control apparatus for a suspension apparatus, includes: a vehicle speed acquiring section which acquires a vehicle speed as a speed of a vehicle; an acquisition section which acquires a stroke velocity of the suspension apparatus; a contribution ratio determining section which determines a contribution ratio between a first parameter and a second parameter based on the vehicle speed, the first parameter serving for controlling a damping force in a first speed region of the vehicle, the second parameter serving for controlling the damping force in a second speed region which is a speed region higher in speed than the first speed region; a change amount restricting section which restricts a change amount of the contribution ratio; and a damping force controlling section which controls the damping force of the suspension apparatus based on the restricted contribution ratio and the stroke velocity.

A suspension operation system includes: a suspension that includes a plurality of links supporting a wheel, at least one or more of the links having an actuator increasing or decreasing its length in an axial direction; a control device that supplies a drive signal to the actuator to control operation of the suspension; and a suspension operation terminal that operates the suspension. The suspension operation terminal includes: a detector that detects operation input information to the suspension operation terminal; and a communicator that transmits information about a target posture of the wheel, the information being based on the operation input information, to the control device as an operation command. The control device includes: a first calculator that calculates the length of the actuator on the basis of the operation command; and a drive circuit that produces the drive signal on the basis of information from the first calculator.

A control apparatus for a suspension apparatus includes: an acquisition section which acquires a stroke amount of the suspension apparatus disposed between a vehicle body and a wheel to damp vibration propagated from the wheel; a calculation section which calculates a stroke velocity based on the stroke amount; and a damping force control section which controls damping force of the suspension apparatus based on the stroke velocity. The calculation section includes a first calculation section which differentiates the stroke amount by use of a first time constant as a time constant, to thereby calculate a first stroke velocity, and a second calculation section which differentiates the stroke amount by use of a second time constant larger than the first time constant as a time constant, to thereby calculate a second stroke velocity, and calculates the stroke velocity based on the first stroke velocity and the second stroke velocity.

Methods, apparatus, systems and articles of manufacture are disclosed for estimating a suspension displacement. An example apparatus includes a suspension motion determiner module programmed to output a signal to a first suspension assembly of a vehicle based on a first deflection of the first suspension assembly, the first deflection calculated based on a calculation and a second deflection of a second suspension assembly of the vehicle, the calculation selected based on whether the vehicle is utilized in a first mode or a second mode.

A damping control device is configured to acquire, as a preview condition amount, an unsprung condition amount at a predicted passing position where a wheel of a vehicle is predicted to pass, based on preview reference data being sets of data in which unsprung condition amounts and pieces of positional information of the wheel are linked to each other. The unsprung condition amounts indicate a displacement condition of an unsprung portion displaced in a vertical direction due to a displacement of a road surface acquired when the vehicle has traveled on the road surface. The damping control device is configured to execute, at a timing when the wheel passes through the predicted passing position, preview damping control to cause control force to agree with a target control force.

Provided is an electronically controlled suspension system for estimating a rear wheel acceleration, which includes: a sensor unit measuring an acceleration value of a front wheel; a storage unit storing the acceleration value of the front wheel; and a control unit electrically connected to the sensor unit and the storage unit, and storing the acceleration value of the front wheel in the storage unit, and estimating the acceleration value of a rear wheel by using the acceleration value of the front wheel, wherein the storage unit has a front wheel acceleration buffer, the front wheel acceleration buffer is constituted by several cells, and the several cells are distinguished by a distance index, and the control unit stores the acceleration value of the front wheel corresponding to the distance index in each of the several cells, and the acceleration value of the rear wheel is estimated as the acceleration value of the front wheel, which is stored in a cell positioned behind a location of the front wheel by a wheelbase distance.

In a vehicle height adjustment device, an operation amount of an actuator increases in accordance with supplied current, a detector detects a vehicle height, and a changer changes the vehicle height in accordance with the operation amount of the actuator. The changer shifts to a vehicle height increasing state or to a vehicle height decreasing state based on whether the operation amount is not higher than a predetermined amount. A controller controls the current supplied to the actuator to make the relative position have a target value. The controller determines a target current supplied to the actuator based on a control map that correlates a deviation between the target value of the relative position and a detection value to the target current.

In a vehicle height adjustment device, an operation amount of an actuator increases in accordance with supplied current, a detector detects a vehicle height, and a changer changes the vehicle height in accordance with the operation amount of the actuator. The changer shifts to a vehicle height increasing state or to a vehicle height decreasing state based on whether the operation amount is not higher than a predetermined amount. A controller controls the current supplied to the actuator to make the relative position have a target value. The controller determines a target current supplied to the actuator based on a control map that correlates a deviation between the target value of the relative position and a detection value to the target current.

An air spring suspension system includes first, second, third, and fourth air spring assemblies configured to support a frame of the vehicle at front and rear suspension/wheel assemblies of the vehicle. A valve block includes a valve. A compressor supplies pressurized gas to the valve block. A reservoir is in fluid communication with the valve block. The air spring suspension system includes first, second, third, and fourth height sensors. First, second, third, and fourth variable flow valves are in fluid communication with the valve of the valve block and the first, second, third, and fourth air spring assemblies, respectively. A pressure sensor senses pressure in the valve block. A vehicle kinematic sensor senses a vehicle kinematic parameter. A controller is configured to control the first, second, third, and fourth variable flow valves in response to the pressure, the first, second, third, and fourth height sensors, and the vehicle kinematic parameter.