The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2026
Filed:
Sep. 15, 2021
Hydac New Technologies Gmbh, Sulzbach/Saar, DE;
HYDAC NEW TECHNOLOGIES GMBH, Sulzbach/Saar, DE;
Abstract
A hydraulic power steering system includes: a steering actuator; first and second subsystems each including a flow-control valve arrangement including a relief valve; and a fault detection device. The fault detection device is configured to: (i) determine and deactivate a faulty component of the first or second subsystems; and (ii) cause a fault-free component of the first or second subsystems to maintain control of the steering actuator. The flow-control valve arrangement of each of the first and second subsystems includes an inlet valve and a discharge valve, the inlet valve and the discharge valve being continuous-control valves configured to be electrically actuated by control signals that, when the control signals are compared with each other by the fault detection device and a deviation from reference data is determined, lead to deactivation of at least one of the relief valves or the continuous-control valves that is detected as faulty.