Hydraulic Valve Actuation via Modulated Current
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hydraulic valves in motor vehicle transmission systems face issues with hysteresis and dirt accumulation, leading to sluggish operation and potential impacts on driving behavior, as existing methods for valve excitation do not effectively detect or address faulty functions in real-time.
Innovation Solution
A method that superposes a modulation alternating current on the actuating current of hydraulic valves to create a shaking vibration, adjusting its amplitude and frequency based on deviations between actual and setpoint pressures to reduce hysteresis and clean the valve, with enhancement settings increasing energy input to address faulty operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a modulation alternating current is superposed on the actuating current to create shaking vibration for reducing hysteresis, then the hydraulic valve can be actuated more quickly and precisely, but the hydraulic valve accumulates dirt and becomes dirty
Solution Approach 1:
The patent applies mechanical vibration by superposing a modulation alternating current on the actuating current, creating shaking vibrations in the hydraulic valve. This vibration reduces hysteresis and improves actuation speed by preventing the valve from sticking, while the controlled amplitude and frequency ensure the vibration remains within safe limits to avoid excessive dirt accumulation
Solution Approach 2:
The patent changes the parameters of the modulation alternating current (amplitude and frequency) dynamically based on the detected deviation between actual and setpoint pressures. By adjusting these parameters, the system optimizes the cleaning effect and hysteresis reduction while preventing excessive vibration that could lead to dirt accumulation and valve damage
2Object-affected harmful factors
If the amplitude and frequency of modulation alternating current are increased to strengthen shaking vibration for cleaning the hydraulic valve, then dirt can be removed more effectively, but the load on the hydraulic valve increases
Solution Approach 1:
The patent employs feedback by continuously monitoring the deviation between actual and setpoint pressures and using this information to adjust the amplitude and frequency of the modulation alternating current. This closed-loop control ensures that the vibration strength is increased only when and to the extent necessary for effective dirt removal, while preventing excessive load on the hydraulic valve
Solution Approach 2:
The patent makes the modulation alternating current dynamic by continuously adjusting its amplitude and frequency based on real-time pressure deviation detection. This dynamic adaptation allows the system to apply stronger vibrations when dirt accumulation is detected while reducing vibration strength during normal operation, thereby removing dirt effectively without imposing excessive load on the valve
3Measurement precision
If a modulation alternating current is superposed on the actuating current to reduce hysteresis, then precise actuation is enabled, but the actuating current requires modification when deviations exceed tolerance ranges
Solution Approach 1:
The patent uses feedback by comparing the actual pressure with the setpoint pressure and detecting deviations. Based on this feedback, the control device modifies the actuating current and modulation alternating current parameters, ensuring precise pressure control while managing system complexity through automated detection and adjustment
Solution Approach 2:
The system performs self-service by automatically detecting pressure deviations and adjusting the modulation alternating current parameters without external intervention. The control device autonomously monitors the hydraulic valve operation and modifies the actuating current when deviations exceed tolerance ranges, maintaining precision while minimizing the need for external control complexity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method enables precise, quick, and uniform actuation of hydraulic valves while effectively cleaning them, reducing static friction and preventing damage by increasing vibrations only when necessary, thus improving operational reliability and reducing repair needs.
Implementation Method 1
an actuating current of the hydraulic valve is superposed with a modulation alternating current in order to adjust a shaking vibration of the hydraulic valve
Implementation Method 2
the adjustment of the shaking vibration serves to reduce a hysteresis in the hydraulic valve
Implementation Method 3
the shaking vibration with respect this enables an especially low static friction of the hydraulic valve
Implementation Method 4
an amplitude and/or a frequency of the modulation alternating current is modified as compared to a starting value equalizing a hysteresis of the actual pressure relative to the setpoint pressure, as a function of an exceeding of a tolerance range by the determined deviation... in order to eliminate a potential cause of the faulty function, for example dirt
Data Source
AI summary
A method for operating a hydraulic valve of a hydraulic device of a motor vehicle transmission device, wherein an actuating current of the hydraulic valve is superposed with a modulation alternating current in order to adjust a shaking vibration of the hydraulic valve by a control device, wherein a deviation between an actual pressure resulting from the actuating current and a setpoint pressure determined as a function of the actuating current is determined for the hydraulic device by means of an electronic computing device, and an amplitude and/or a frequency of the modulation alternating current is increased as compared to a starting value equalizing a hysteresis of the actual pressure relative to the setpoint pressure, as a function of a tolerance range being exceeded by the determined deviation.