Method for switching a hydraulic valve

The method addresses hydraulic valve switching challenges by using pulse duration modulation to adjust duty cycles based on inductance changes, ensuring stable operation and cost-effective switching without additional sensors, thus reducing noise and damage risks.

DE102020203344B4Active Publication Date: 2025-11-27CONTINENTAL AUTOMOTIVE TECHNOLOGIES GMBH
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Patent Information

Application Number
DE102020203344
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2020-03-16
Publication Date
2025-11-27
Estimated Expiration
2040-03-16

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Abstract

Method for switching a hydraulic valve (4) between a pressurization unit (2) and a hydraulic actuator (3) comprising the steps: - Applying a test current (14a) to the hydraulic valve (4) using a pulse duration modulation controller (8), - Determining a duty cycle (16) of the pulse duration modulation controller (8) and / or a quantity derived from the duty cycle (16), - Increasing the hydraulic pressure on one side of the hydraulic valve (4) by means of the pressurizing unit (2), - Detection of a change in the duty cycle (17) and / or the quantity derived from the duty cycle (17) - When the change occurs, increase the valve current (14) to a switching current (14b).
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Citation Information

Patent Citations

  • Method for calibrating analogized valves in a pressure regulating device

    DE102007010514A1

  • Device and method for controlling a solenoid valve

    DE102016225225A1