Electrohydraulic Pump Control With Model-Based Valve Adaptation

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Solution Overview

Problem

Existing hydromechanical control devices for adjustable hydraulic pump systems are inflexible and prone to hydraulic losses, making it difficult to adapt control parameters to changing conditions such as temperature or wear.

Innovation Solution

An electrohydraulic control device comprising a valve device, an electronic control unit, and fluid sensors, which uses computer-based modeling and artificial neural networks to dynamically adjust the control of adjustable hydraulic pump systems, reducing hydraulic losses and enhancing adaptability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If hydromechanical control devices are used, then the system can be manufactured with conventional methods, but the control parameters cannot be changed during operation and hydraulic losses increase

Engineering Contradiction:

Improveadaptability of control parametersVSAvoidhydraulic losses

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The patent replaces the traditional hydromechanical control system with an electrohydraulic control system. The electronic control unit receives sensor signals and actuates electromagnetically actuated valves, substituting mechanical control elements with electronic components. This enables dynamic adjustment of control parameters during operation while reducing hydraulic losses through optimized control algorithms and direct electronic actuation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The control system transitions from static, fixed control parameters to dynamic, adjustable parameters. The electronic control unit can modify control variables in real-time based on sensor feedback and computer-based modeling, allowing the system to adapt to changing operational conditions such as temperature variations and component wear.

Inventive Principle:

Principle #15Dynamics

2Device complexity

If hydromechanical control devices are used, then the system structure is simple, but the control accuracy and dynamics deteriorate

Engineering Contradiction:

Improvecontrol device structureVSAvoidcontrol accuracy

Core Design Contradiction:

Device complexityVSMeasurement precision

Solution Approach 1:

The patent implements a closed-loop control system with sensors that continuously monitor system parameters and feed signals back to the electronic control unit. This feedback mechanism enables precise control by continuously comparing actual system state with desired state and making real-time adjustments, significantly improving control accuracy and dynamics.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The electronic control unit serves as an intermediary between the sensor inputs and the electromagnetically actuated valves. It processes sensor signals, applies control algorithms based on computer-based modeling, and generates actuation signals, thereby mediating the control process to achieve high precision while maintaining manageable system complexity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If the number of hydraulic components is increased, then the control functionality is enhanced, but the hydraulic losses increase

Engineering Contradiction:

Improvecontrol functionalityVSAvoidhydraulic losses

Core Design Contradiction:

Adaptability or versatilityVSLoss of energy

Solution Approach 1:

The patent extracts the control logic from the hydraulic domain and places it in the electronic domain. By removing the need for multiple hydraulic control components and replacing them with a single electronic control unit that processes information and actuates valves electronically, the system reduces hydraulic losses while maintaining enhanced control functionality.

Inventive Principle:

Principle #2Taking out (Extraction)

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 electrohydraulic control device allows for precise, adaptive control of adjustable hydraulic pump systems, reducing hydraulic losses and enabling real-time adjustments to changing operational conditions.

Implementation Method 1

a first electromagnetically actuated valve (5)

Methodology Applied

Scientific EffectElectromagnetic actuation: Electromagnet

Data Source

PatentUS20250027515A1Electrohydraulic control device and adjustable hydraulic pump system

Publication Date: 2025.01.23 HAWE HYDRAULIK SE

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.