A roll stabilizer for a motor vehicle includes a torsion bar and a vibration damper located on the torsion bar. The vibration damper is configured to vibrate relative to the torsion bar. The vibration damper includes two half-shells formed together about the torsion bar. Damper elements are disposed between the half-shells. The damper elements can be adjusted via an adjustment component to alter the rigidity of the damper elements.

An electrically powered suspension system includes: an electromagnetic actuator; an information acquisition unit configured to acquire time-series information related to stroke position of the electromagnetic actuator, information on stroke velocity, and an amount of change in stroke of the electromagnetic actuator and information on a stroke direction based on the time-series information; a damping force calculation unit configured to calculate target damping force based on the information on the stroke velocity; and a drive control unit configured to control driving of the electromagnetic actuator using target driving force obtained based on the target damping force. The damping force calculation unit calculates equivalent friction compensation force based on the amount of change in the stroke and the information on the stroke direction, and corrects the target damping force based on the calculated equivalent friction compensation force. The equivalent friction compensation force has elastic force component and dynamic friction force component.

To provide a solenoid, a solenoid valve, and a damper in which when the amount of current supplied to the solenoid is small, the thrust of the solenoid to bias an object in one direction can be made small, and at the same time, even when the solenoid is not energized, the object can be biased in the same direction as that of the thrust. The solenoid includes a coil, a first movable iron core and a second movable iron core that are attracted in a direction away from each other by energizing the coil, a coil spring that biases the first movable iron core toward the second movable iron core, and a leaf spring that restricts the approach of the first movable iron core and the second movable iron core.

An inductive shock absorber for a motor vehicle is provided having a cylindrical damper tube and a damper rod. A related method for operating a shock absorber is also provided.

A mounting structure of a dynamic damper capable of effectively reducing the vibration of a vibration body is provided. The mounting structure includes a suspension member 100 inhibiting the upward shift of a mass member 5. The suspension member 100 and plates 3 are configured as separate members, so that as compared with the case where a pair of plates 3 are coupled, the opposite interval between the plates 3 can be determined without being affected by the dimension accuracy of such the coupling portion. Thus, the thicknesses of the rubber elastic bodies 4 can foe formed at high accuracy, so that the mass member 5 can be easily vibrated at the desired frequency. Therefore, the vibration of the suspension member 100 can be effectively reduced.

Provided is a vehicle suspension device capable of obtaining excellent steering stability and good riding comfort in conformity to a tire longitudinal spring constant. The suspension device (1) comprises: an upper arm (2); a lower arm (4); a wheel support (8); and a shock absorber (12) having an upper end attached to a vehicle body (B) of a vehicle and a lower end attached to the lower arm, wherein the upper arm and the lower arm are arranged such that a ratio ζ.sub.scuff of a scuff change-based apparent damping coefficient C.sub.scuff to a critical damping coefficient C.sub.C of the suspension device becomes equal to or greater than a lower limit, under the condition that the vehicle is traveling straight ahead on a flat road at a given vehicle speed, wherein the scuff change-based apparent damping coefficient C.sub.scuff is obtained by dividing, by a stroke speed of a wheel, an up-down directional component of a vehicle width-directional force arising on a ground contact surface of the wheel due to a vehicle width-directional displacement of the wheel occurring along with a stroke of the wheel, and the lower limit is set such that it becomes larger as a tire longitudinal spring constant of the wheel becomes smaller.

Aspects of the present invention relate to a method and to a control system for controlling an active suspension of a road vehicle comprising a vehicle body and a plurality of wheels, the control system comprising one or more controllers, the control system configured to: receive information indicative of a requirement for positive or negative vehicle acceleration in a first axis; and control the active suspension to commence modifying an angle of the vehicle body relative to the plurality of wheels about a second axis perpendicular to the first axis in dependence on the receiving an indication, before commencement of the vehicle acceleration.

A system and method for utilizing an active valve customizable tune application is disclosed. The system includes a mobile device having a memory, an active valve tune application, and at least one processor. The processor initiates the active valve tune application, receives, from a database, an active valve suspension tune having a number of performance range adjustable settings, and receives user related input information. At least one of the performance range adjustable settings is modified based on the received input information to generate a modified active valve suspension tune. The system includes an active suspension of a vehicle, wherein the modified active valve suspension tune is implemented by the active suspension.

A system and method for utilizing an active valve customizable tune application is disclosed. The system includes a mobile device having a memory, an active valve tune application, and at least one processor. The processor initiates the active valve tune application, receives, from a database, an active valve suspension tune having a number of performance range adjustable settings, and receives user related input information. At least one of the performance range adjustable settings is modified based on the received input information to generate a modified active valve suspension tune. The system includes an active suspension of a vehicle, wherein the modified active valve suspension tune is implemented by the active suspension.

A milling machine includes a spindle which is arranged to receive a tool holder and in use to cause rotation of the tool holder within the spindle. A portion of the spindle housing surrounding the tool holder is provided with at least one pair of opposing damping units.