Hydraulic Valve Unit Pressure Readjustment
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Solution Overview
Problem
In construction vehicles, hydraulic accumulators face challenges in maintaining an ideal pressure characteristic curve due to temperature variations, requiring cumbersome and complex pressure readjustments.
Innovation Solution
A hydraulic system with a valve unit comprising at least three valves and an actuating means, allowing direct control of the valves and transmission of control signals for easy pressure readjustment without a control loop, connected to a hydraulic pump, accumulator, and fluid reservoir for optimal pressure adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a hydraulic accumulator is used with a hydraulic consumer, then hydraulic energy storage and energy-saving operation are achieved, but pressure readjustment becomes cumbersome and complex due to temperature-dependent characteristic curve variations
Solution Approach 1:
The valve unit is divided into multiple independent valves (first valve, second valve, third valve) that can be controlled separately. Each valve handles specific functions: the first valve controls connection to the pump, the second valve controls connection to the accumulator, and the third valve controls connection to the reservoir. This segmentation allows simple, independent control of each function without complex interdependencies.
Solution Approach 2:
The valve unit with its three valves provides multiple functions within a single integrated structure: it can connect the accumulator to the pump for pressure readjustment, connect to the reservoir for fluid supply, and control fluid flow between these components. The actuating means can generate different actuating signals to achieve different operational modes, making the valve unit a multi-functional component that simplifies the overall system.
2Adaptability or versatility
If the hydraulic accumulator moves with different oil temperatures, then operational flexibility is improved, but maintaining the ideal characteristic curve becomes difficult requiring complex control
Solution Approach 1:
The valve unit dynamically responds to actuating signals from the actuating means to adjust the system operation in real-time. The actuating means generates actuating signals that control the three valves to maintain optimal pressure characteristics despite temperature variations and movement conditions. This dynamic control allows the system to adapt to changing conditions while maintaining reliability.
Solution Approach 2:
The system changes operational parameters through the actuating means that generates different actuating signals based on temperature and operational conditions. By adjusting the opening states of the three valves through controlled actuating signals, the system maintains the ideal characteristic curve across varying temperatures and movement states, ensuring reliable operation.
3Manufacturing precision
If traditional pressure readjustment methods are used, then pressure control is achieved, but the control system becomes cumbersome and complex requiring control loops
Solution Approach 1:
The valve unit with its three valves and actuating means provides self-service pressure control without requiring external control loops. The actuating means directly generates actuating signals that control the valve openings to achieve the desired pressure in the hydraulic accumulator. This self-contained control mechanism eliminates the need for complex external control systems while maintaining precise pressure control.
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
Enables simple and efficient pressure readjustment in hydraulic accumulators, even under varying oil temperatures, optimizing pressure control for hydraulic consumers without the need for complex control loops.
Implementation Method 1
a valve unit for a hydraulic system is designed with at least three valves and with at least one actuating means, the valves and the actuating means being connected to one another directly and/or indirectly
Implementation Method 2
a hydraulic pump means, by means of which the valve unit can be connected directly and/or indirectly to a hydraulic pump means
Implementation Method 3
hydraulic accumulators, which are essentially hydraulic accumulators for pressurized hydraulic fluid such as e.g. B. hydraulic oil are used
Data Source
Figure 1~2
AI summary
The valve unit (100) has three valves (140,150,160) and several adjusting units that are indirectly and/or directly connected to each other. The valves (150,160) are arranged in parallel with respect to operating state of valve (140), so that control signal (X) of valves is adjusted. An independent claim is included for hydraulic assembly.