Electrohydraulic control device and adjustable hydraulic pump system
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Solution Overview
Problem
Current hydromechanical control devices for adjustable hydraulic pump systems are inflexible and prone to hydraulic losses, making it difficult to adapt to changing control targets or environmental conditions, and require numerous hydraulic components.
Innovation Solution
An electrohydraulic control device with a valve system, electronic control unit, and fluid sensors that uses computer-based modeling and artificial neural networks to dynamically adjust the hydraulic pump system's operation, reducing the need for hydraulic components and enabling adaptive control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If hydromechanical control devices are used, then control of fluid flow is achieved, but the devices require a large number of hydraulic components resulting in hydraulic losses
Solution Approach 1:
The patent replaces traditional hydromechanical control devices with an electrohydraulic control device that uses an electromagnet instead of complex mechanical-hydraulic mechanisms. The electromagnet directly actuates the valve element, eliminating the need for numerous hydraulic components such as pilot valves, springs, and complex pressure chambers, thereby reducing hydraulic losses while maintaining control functionality.
Solution Approach 2:
The invention extracts and removes unnecessary hydraulic components from the control system. By using a simplified electromagnet-actuated valve design, the patent eliminates redundant hydraulic elements that were present in traditional hydromechanical systems, directly reducing the number of components and associated hydraulic losses.
2Adaptability or versatility
If hydromechanical control devices are used, then control of fluid flow is achieved, but the control parameters cannot be changed during operation
Solution Approach 1:
The patent implements dynamic adaptability by allowing the electromagnetic actuator's control parameters (such as coil current, pulse width modulation duty cycle, or frequency) to be changed during operation. This enables the valve's flow characteristics to be dynamically adjusted according to changing control targets or environmental conditions, providing versatility without requiring physical reconfiguration of hydraulic components.
Solution Approach 2:
The invention enables parameter changes during operation by controlling the electromagnet through variable electrical parameters (current, voltage, pulse duration). This allows the control characteristics of the valve to be adjusted dynamically, making the system adaptable to different operating conditions without changing the physical hydraulic architecture.
3Measurement precision
If traditional control devices are used, then basic control function is provided, but control accuracy and dynamics are insufficient when connected to higher-level hydraulic systems
Solution Approach 1:
The patent incorporates feedback mechanisms where sensors detect actual hydraulic parameters (such as pressure or flow) and feed this information back to the control system. The controller adjusts the electromagnet's actuation based on the deviation from desired values, improving control accuracy and enabling dynamic adaptation to changing system conditions when connected to higher-level hydraulic systems.
Solution Approach 2:
By replacing slow-responding mechanical-hydraulic control mechanisms with an electromagnet-actuated system, the patent achieves faster response times and improved control dynamics. The electromagnet can be controlled with precise electrical signals that respond quickly to control commands, enhancing the system's ability to track changing reference variables dynamically.
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
The solution allows for precise, adaptive control of hydraulic pump systems during operation, reducing hydraulic losses and enabling flexibility in response to changing conditions, while minimizing the number of hydraulic components required.
Implementation Method 1
The valve device (2) comprises an electromagnet (5)
Data Source
AI summary
An electrohydraulic control device for an adjustable hydraulic pump system includes a valve device, an electronic control unit and a first fluid sensor. The valve device includes a pressure inlet, a tank outlet and a first electromagnetically actuated valve. An outlet pressure of the first adjustable hydraulic pump system is applied to the pressure inlet. The first fluid sensor detects an actual value of a fluid parameter of the first adjustable hydraulic pump system and transmits it to the electronic control unit. The electronic control unit includes computer-based modeling of the dynamics of the first adjustable hydraulic pump system, and actuates the first electromagnetically actuated valve based on the actual value of the fluid parameter and the computer-based modeling.