Hydropneumatic Suspension Priority Control for Shared Fluid Supply
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Solution Overview
Problem
Existing hydropneumatic suspension systems for vehicles require significant installation space, high energy consumption, and complex control systems due to separate operation of axle and cabin suspensions with individual fluid supplies and valve controls.
Innovation Solution
A combined hydropneumatic suspension system where both axle and cabin suspensions are controlled by a single device with priority recognition based on sensor data, reducing the need for hydraulic lines, control valves, and installation space, and utilizing a central control concept to optimize fluid supply and reduce energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If axle suspension and cabin suspension are operated as separate, independently operating assemblies with individual fluid supplies and valve controls, then each suspension can be controlled independently, but installation space increases and energy consumption increases
Solution Approach 1:
The patent combines the axle suspension and cabin suspension into a single hydropneumatic system with a common fluid supply and integrated valve control. The control device manages both suspensions through unified hydraulic lines and a shared pump system, eliminating the need for separate fluid supplies and reducing installation space while maintaining independent control capability through priority recognition logic.
Solution Approach 2:
The control device is designed with multi-functionality to manage both axle and cabin suspensions using a single fluid supply system. The valve control mechanism can selectively direct pressurized fluid to either suspension system based on detected priority needs, allowing one control unit to perform multiple suspension control functions without requiring separate dedicated systems for each suspension type.
2Ease of operation
If axle suspension and cabin suspension are operated as separate, independently operating assemblies with individual fluid supplies and valve controls, then each suspension can be controlled independently, but energy consumption increases
Solution Approach 1:
The patent combines the axle suspension and cabin suspension into a single hydropneumatic system with a common fluid supply and integrated valve control. The control device manages both suspensions through unified hydraulic lines and a shared pump system, eliminating the need for separate fluid supplies and reducing installation space while maintaining independent control capability through priority recognition logic.
Solution Approach 2:
The control device incorporates sensor systems that automatically detect the priority needs of either suspension system and autonomously direct fluid supply accordingly. The priority recognition mechanism operates without external intervention, using sensor data to determine which suspension requires pressurized fluid at any given moment, thereby reducing energy consumption through intelligent, adaptive resource allocation.
3Ease of operation
If axle suspension and cabin suspension are operated as separate, independently operating assemblies with individual fluid supplies and valve controls, then each suspension can be controlled independently, but control effort and hydraulic drive power increase
Solution Approach 1:
The patent combines the axle suspension and cabin suspension into a single hydropneumatic system with a common fluid supply and integrated valve control. The control device manages both suspensions through unified hydraulic lines and a shared pump system, eliminating the need for separate fluid supplies and reducing installation space while maintaining independent control capability through priority recognition logic.
Solution Approach 2:
The control device incorporates sensor systems that automatically detect the priority needs of either suspension system and autonomously direct fluid supply accordingly. The priority recognition mechanism operates without external intervention, using sensor data to determine which suspension requires pressurized fluid at any given moment, thereby reducing energy consumption through intelligent, adaptive resource allocation.
4Ease of operation
If axle suspension and cabin suspension are operated as separate, independently operating assemblies, then each suspension can be controlled independently, but the number of hydraulic lines and control valves increases
Solution Approach 1:
The patent combines the axle suspension and cabin suspension into a single hydropneumatic system with a common fluid supply and integrated valve control. The control device manages both suspensions through unified hydraulic lines and a shared pump system, eliminating the need for separate fluid supplies and reducing installation space while maintaining independent control capability through priority recognition logic.
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 solution reduces installation space, energy consumption, and control effort while ensuring optimal operation of both suspensions with improved dynamics and reduced weight, eliminating undesirable overlap effects and interference.
Implementation Method 1
both the piston and rod chambers of a working cylinder are connected on the fluid side to at least one hydraulic accumulator
Implementation Method 2
whose gas-side preload determines the spring-damper behavior for the respective working cylinder
Implementation Method 3
essentially only the differential volume between the piston and rod chambers is guided through the proportional throttle valve during system operation. This achieves proportional damping for the respective differential cylinder
Data Source
AI summary
The invention relates to a hydropneumatic suspension system for vehicles, at least consisting of an axle suspension (10) and a cab suspension (12) which can be connected to a pressure supply source in order to be supplied with pressurized fluid. The invention is characterized in that the axle suspension (10) and the cab suspension (12) can be actuated together by means of an actuator (14), and one of the suspensions (10, 12) is supplied with pressurized fluid on demand before the respective other suspension (12, 10) by means of a priority detection (16) using a sensor device (18) for each suspension (10, 12).