Vehicle Level Control System Valve Overflow Strategy
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Solution Overview
Problem
Existing vehicle level control systems experience time delays in setting a predetermined vehicle body level due to delayed actuation of the compressor, leading to unnecessary compressor wear and noise, especially when the vehicle is stationary.
Innovation Solution
A level control system that includes a pressure generator and a valve device for an overflow process, with an evaluation unit determining whether the vehicle body level can be set solely by actuating the valve device, thereby reducing compressor running time and noise by avoiding unnecessary compressor activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the compressor is actuated only when pressure equilibrium is established between the compressed air reservoir and the air spring, then the compressor running time is reduced, but time delays in the lifting process become unavoidable
Solution Approach 1:
The system pre-charges the compressed air reservoir to a pressure higher than the maximum required air spring pressure before the lifting operation begins. This preliminary action ensures that when lifting is needed, the compressor can immediately activate without waiting for pressure equilibrium, thereby reducing time delay while maintaining reduced overall compressor running time.
Solution Approach 2:
The system dynamically adjusts the compressor activation strategy based on real-time pressure conditions. By continuously monitoring the pressure difference between the reservoir and air spring, the system can decide whether to activate the compressor immediately or wait for pressure equilibrium, optimizing the balance between response time and energy consumption.
2Manufacturing precision
If the compressor is activated frequently to maintain precise vehicle body level, then the vehicle body level control precision is improved, but compressor wear and noise increase
Solution Approach 1:
The system uses feedback from pressure sensors to monitor the vehicle body level and air spring pressure continuously. This feedback mechanism allows the control unit to make informed decisions about compressor activation, activating it only when necessary to maintain precise level control while minimizing unnecessary operations that would increase wear and noise.
Solution Approach 2:
The system changes the operating parameters by pre-charging the reservoir to a higher pressure level, which alters the pressure differential available for lifting. This parameter change enables the system to achieve precise level control with fewer compressor activations, thereby reducing wear and noise while maintaining control precision.
3Speed
If the compressor is activated immediately to raise the vehicle body, then the lifting speed is improved, but compressor noise and wear increase during stationary operation
Solution Approach 1:
The system pre-charges the compressed air reservoir before stationary operation or lifting is initiated. This preliminary action stores potential energy in the pressurized air, enabling immediate high-speed lifting when needed without activating the noisy compressor during stationary periods, thus reducing noise while maintaining lifting speed capability.
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 instantaneous setting of a predefined vehicle body level, reducing compressor wear and noise, and optimizing the lifting process by determining the need for compressor support based on pressure conditions, thus enhancing the efficiency and quiet operation of the system.
Implementation Method 1
a pressure generator (10) for generating a pressure difference between a pressure medium reservoir (11) and at least one pressure-controlled actuating device (12i)
Implementation Method 2
a valve device (13) for carrying out an overflow process between the pressure medium reservoir (11) and the at least one pressure-controlled actuating device (12i)
Data Source
AI summary
The invention relates to a level control system for a vehicle and a method for operating the same. Said level control system comprises a pressure generator (10) for generating a pressure difference between a reservoir (11) containing a pressurized medium and at least one pressure-controlled actuating mechanism (12i) by means of which a predefined vehicle chassis level (d i,soll) can be adjusted, and a valve unit (13) for performing an overflow process between the reservoir (11) containing the pressurized medium and the at least one pressure-controlled actuating mechanism (12i). According to the invention, an evaluation unit (24) decides whether and to what extent the predefined vehicle chassis level (d i,soll) can be adjusted by exclusively actuating the valve unit (13) based on a vehicle chassis level (d i,erw) that is to be expected in case the overflow process is performed