A preview road surface detection device of a vehicle of the present invention includes: a distance sensor that is disposed in a vehicle member and detects a distance to a measurement point on a road surface nearer to a front part of the vehicle, corresponding to at least a central portion of a contact patch to the road surface of a wheel of the vehicle; and a distance calculator that calculates a road surface distance from the vehicle member to the measurement point, based on a value detected by the distance sensor. A displacement of the road surface nearer to the front part of the vehicle is detected as a road surface condition. The displacement of the road surface is calculated from the road surface distance and a vehicle height of the vehicle member when the distance sensor detects the distance.

Methods and apparatus are disclosed for adjusting the front to rear ratio of roll damping and/or roll stiffness in a vehicle based on vehicle yaw rate and/or the rate of change of steering wheel angle. Also disclosed are methods and apparatus for dynamically adjusting one or more suspension system control parameters based on one or more of steering wheel angle, rate of change of steering wheel angle and yaw rate.

1. A device for decoupling vibrations between two systems and a working machine

2. A device together with an assigned working machine for decoupling vibrations between two systems (2, 4) in the form of spring-mass oscillators, of which one system (2) is assigned to a motion machine and the other system (4) is assigned to an operator operating the motion machine, which other system (4) at least partially performs motions about a transverse axis (Q) during driving motions of the motion machine and in doing so is subject to vertical motions in the direction of a vertical axis (z) at an absolute vertical speed (.sub.z1,1), which serves as an input variable of control devices and/or regulating devices, which control a damping system (8) of the one (2) and/or the other (4) system to compensate for the vibrations, is characterized in that the respective pitch motion of the other system (4) is detected by at least one rotation rate sensor, the respective measured value (.sub.1) of which, preferably amplified by only a predeterminable factor (L.sub.1), results in the absolute vertical speed (.sub.z1,1) as input variable.

A road surface condition is determined appropriately. A road surface determining section (84) configured to determine a road surface state includes a threshold setting section (845) configured to set a threshold for determining the road surface state, so that a value of a desired control variable is multiplied by a coefficient determined in accordance with a result of the determination by the road surface determining section (84).

A weight balancing system for a vehicle performs a method of adjusting a weight on a wheel of a vehicle. The system includes a processor of the vehicle and a scale. A wheel of the vehicle is placed on the scale, the wheel having an associated spring seat and associated spring. The scale measures a weight placed on the wheel by the vehicle and communicates the weight to the processor. The processor activates the spring seat to adjust a length of the spring, thereby adjusting the weight placed on the wheel by the vehicle.

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 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.

An active suspension control system for a vehicle includes a mathematical model based on a modal expansion of the vehicle. Model parameters of the vehicle can be extracted from the modal expansion using sensor data generated on the vehicle, e.g., on demand and/or in real time. The model parameters and the modal expansion can be used to determine a vehicle state, predict future vehicle states, and control aspects of an active suspension system based on the predicted future vehicle states. The model parameters may also be used to update the mathematical model, e.g., to account for component wear over time, and/or to detect anomalies or defects in the active suspension system.

This application provides a vehicle and a control method for a vehicle suspension. The vehicle includes a first component, a second component, and a vehicle suspension. The vehicle suspension is located between the first component and the second component. The first component is a component that the vehicle suspension bears, the second component is configured to bear the vehicle suspension and the first component, and the vehicle suspension includes a variable damper connected between the first component and the second component. The variable damper is configured to provide a first force to the first component based on a first acceleration of the first component, to control a displacement of the first component relative to the second component in a height direction of the vehicle. In the embodiments of this application, bumps in a driving process of the vehicle can be effectively reduced, so that vehicle ride comfort is improved.

A preview road surface detection device of a vehicle of the present invention includes: a distance sensor that is disposed in a vehicle member and detects a distance to a measurement point on a road surface nearer to a front part of the vehicle, corresponding to at least a central portion of a contact patch to the road surface of a wheel of the vehicle; and a distance calculator that calculates a road surface distance from the vehicle member to the measurement point, based on a value detected by the distance sensor. A displacement of the road surface nearer to the front part of the vehicle is detected as a road surface condition. The displacement of the road surface is calculated from the road surface distance and a vehicle height of the vehicle member when the distance sensor detects the distance.