STEERING DAMPER WITH ACTIVE ADJUSTMENT OF DAMPING CHARACTERISTICS

摘要

A device (1) is disclosed for in a vehicle adjusting the rotational damping of a steering device (2) such that the rotational damping varies depending on whether the rotational motion about a steering axis (SA) is caused by a force acting on the steering device (2) of the vehicle or a force acting on the part(s) (3) of the vehicle contacting the ground. The device comprises a steering damper (4) comprising a damping housing (4a) enclosing a main chamber which comprises hydraulic fluid and is partitioned into a first and a second damping chamber (C1, C2), for example by a delimiting part (11, 11') moveable in relation to the damping housing. The damping housing (4a) is fixed on an attaching part (5, 5') that couples together the part(s) (3) of the vehicle contacting the ground with the steering device (2). The present invention is characterized in that the flow of hydraulic fluid in the steering damper partly or wholly is adjusted by a main valve unit (HVU) that is coupled together with both the attaching part (5, 5') and the steering device (2). By means of this coupling the opening area (A1, A2) of the main valve unit is determined by a relative motion between the attaching part (5, 5') and the steering device (2) such that the flow of the hydraulic fluid in a direction from and to the respective damping chamber of the steering damper is controlled depending on the cause of the rotational movement. Furthermore, a steering device adapted to be arranged in a vehicle is disclosed.