Hydropneumatic Suspension Control With Priority Fluid Supply
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Solution Overview
Problem
Existing hydropneumatic suspension systems for vehicles require significant installation space, energy, and control effort due to separate fluid supply and valve control systems for axle and cabin suspensions, leading to inefficiencies and weight issues.
Innovation Solution
A centralized control device manages both axle and cabin suspensions using a priority detection system with sensors, reducing hydraulic drive power and installation space by prioritizing fluid supply based on demand, integrating suspensions for reduced parts and hydraulic piping, and employing displacement sensors and hydraulic accumulators for dynamic response.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If separate fluid supply and valve control systems are used for axle and cabin suspensions, then each suspension can be controlled independently, but installation space, energy consumption, and control effort increase significantly
Solution Approach 1:
The patent combines the fluid supply systems and valve control systems for both axle and cabin suspensions into a single integrated hydraulic circuit. A common fluid supply line distributes pressurized fluid to both suspension systems, and a centralized valve control unit manages both suspensions, thereby reducing installation space while maintaining independent control capability through electronic priority detection.
Solution Approach 2:
The hydraulic system is designed with multi-functional components that serve both axle and cabin suspensions. The fluid supply source, control valves, and hydraulic circuitry are configured to provide service to both suspension systems, reducing the total number of components needed while preserving the ability to independently control each suspension when required.
2Ease of operation
If separate fluid supply and valve control systems are used for axle and cabin suspensions, then each suspension can be controlled independently, but energy consumption and control effort increase significantly
Solution Approach 1:
The patent merges the fluid supply systems and valve control systems into a single integrated hydraulic circuit. A common fluid supply line distributes pressurized fluid to both suspension systems, and a centralized valve control unit manages both suspensions, thereby reducing installation space while maintaining independent control capability through electronic priority detection.
Solution Approach 2:
The system incorporates a priority detection mechanism that automatically determines which suspension requires service based on sensor inputs, eliminating the need for continuous active control of both systems. The hydraulic circuit is designed to self-regulate fluid distribution based on demand, reducing control effort and energy consumption while maintaining independent control capability when required.
3Reliability
If separate fluid supply systems are used for axle and cabin suspensions, then each suspension has dedicated fluid supply, but hydraulic piping volume and installation complexity increase
Solution Approach 1:
The patent combines the fluid supply systems and valve control systems for both axle and cabin suspensions into a single integrated hydraulic circuit. A common fluid supply line distributes pressurized fluid to both suspension systems, and a centralized valve control unit manages both suspensions, thereby reducing installation space while maintaining independent control capability through electronic priority detection.
4Ease of operation
If separate valve control systems are used for axle and cabin suspensions, then each suspension has independent control, but control valve volume and weight increase
Solution Approach 1:
The patent merges the fluid supply systems and valve control systems into a single integrated hydraulic circuit. A common fluid supply line distributes pressurized fluid to both suspension systems, and a centralized valve control unit manages both suspensions, thereby reducing installation space while maintaining independent control capability through electronic priority detection.
Solution Approach 2:
The hydraulic system is designed with multi-functional components that serve both axle and cabin suspensions. The fluid supply source, control valves, and hydraulic circuitry are configured to provide service to both suspension systems, reducing the total number of components needed while preserving the ability to independently control each suspension when required.
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 enables a compact, energy-efficient, and dynamically responsive suspension system with reduced weight and assembly complexity, improving control dynamics and functional reliability by minimizing hydraulic components and overlapping adjustments.
Implementation Method 1
both having a hydraulic accumulator, the fluid end of whose piston chamber and rod chamber is connected to the hydraulic accumulator
Data Source
AI summary
A hydropneumatic suspension system for vehicles, at least consisting of an axle suspension (10) and a cabin suspension (12), which for supplying them with pressurized fluid, can be connected to a pressure supply source, is characterized in that both the axle suspension (10) and the cabin suspension (12) can be actuated jointly by means of an control device (14), and in that, by means of a priority detection system (16) involving a sensor device (18) for the respective suspension (10, 12), the supply with pressurized fluid of the one suspension (10, 12) takes precedence depending on demand over the other suspension (12, 10).