Method for operating a damper valve for controlling a damper force of a damper
AssigneeDr. Ing. h.c. F. Porsche Aktiengesellschaft
InventorAndreas Freuer
Life of this patent
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Abstract
A method for operating a damper valve in order to control a damper force of a damper in an active chassis of a vehicle, wherein the damper valve includes a pilot valve for controlling a main spool. The method includes determining a target pressure necessary for a target damper force, in a first damper chamber of the damper; determining a valve flow through a damper valve inlet of the damper valve on the basis of a damper flow, generated by a damper movement, from the first damper chamber and on the basis of a measured pump flow of a pump; determining a main spool opening distance in such a way that, with an applied main spool flow through the main spool opening distance, the target pressure is present as the back pressure in the first damper chamber.
Claims8
A method for operating a damper valve of a damper, wherein the damper valve comprises a pilot valve for controlling a main spool, wherein the method comprises:
- determining a target pressure (FD) necessary for a target damper force (pD) in a first damper chamber of the damper;
- determining a valve flow (QV) through a damper valve inlet of the damper valve on the basis of a damper flow (QD), generated by a damper movement, from the first damper chamber and on a basis of a measured pump flow (QP) of a pump;
- determining a main spool opening distance (xHS) in such a way that, with an applied main spool flow (QHS) through the main spool opening distance (xHS), the target pressure (pD) is present as a back pressure in the first damper chamber;
- determining a pilot valve flow (QPV), which, at the target pressure (pD) to be set, passes via an inlet throttle in the main spool to the pilot valve and at which the main spool is in a force equilibrium;
- determining a pilot valve opening distance (xPV) on the basis of the pilot valve flow (QPV);
- determining an armature position (xA) on the basis of the main spool opening distance (xHS) and the pilot valve opening distance (xPV);
- and
- setting the armature position (xA) by way of an actuator.
Dependencies are inferred from the claim text.