A control system (200, Fig. 2), for controlling an active suspension system (104 Fig. 2) of a vehicle (1, Fig.1) are provided. The active suspension system comprises a hydraulic circuit (17, Fig.5) connected to an actuator (502, Fig. 5). The hydraulic circuit comprises a hydraulic pump (P) operable to control flow rate in the hydraulic circuit. The flow rate (Q_valve) is related to hydraulic pressure (p) in the hydraulic circuit. Displacement of the actuator affects hydraulic pressure in the hydraulic circuit. Hydraulic pressure within a first range (p1) has a second relationship with flow rate. The control system is configured to receive 702 information indicative of displacement of the actuator by external forces originating from outside the active suspension system. The control system then determines 704 a metric dependent on the information indicative of displacement of the actuator over a time period, the metric indicating potential future actuator displacement. The control system then modifies 708 a flow control parameter (Q_pump) for the hydraulic pump, in dependence on the metric, to control the amount by which the hydraulic pressure is greater than the first range. The control system is configured to output 710 the modified flow control parameter to control the hydraulic pump of the active suspension system.
Control system and method for an active suspension system
2024-05-08
Patent
Elektronische Ressource
Englisch
Suspension actuator, active suspension system and control method of active suspension system
Europäisches Patentamt | 2023
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