Tire Pressure Control via Segmented Valves and Rotary Couplings
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Solution Overview
Problem
Modern off-road working machines face challenges in maintaining tire pressure adjustment during driving, especially when separate compressed air sources are unavailable, leading to potential malfunctions and safety concerns due to high safety requirements for electronic control units in tire pressure regulating systems.
Innovation Solution
A tire pressure regulating system that includes electromagnetically switchable valves, two-channel rotary couplings, and a valve arrangement to prevent complete pressure drop, allowing for automatic maintenance of a minimum air pressure, reducing the risk of malfunctions and lowering safety requirements for the electronic control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the tire pressure regulating system uses electromagnetically switchable valves to adjust tire pressure during driving, then the adaptability to different road conditions is improved, but the reliability is worsened due to high safety requirements for electronic control units
Solution Approach 1:
The system divides the vehicle's axle into multiple segments (front axle, rear axle, individual wheels) and equips each segment with independent pressure regulation capability through axle valves and wheel valves. This segmentation allows localized pressure adjustment without requiring complex centralized electronic control, thereby improving reliability while maintaining adaptability.
Solution Approach 2:
The pressure regulation system is designed to automatically maintain minimum pressure in connecting lines through the valve arrangement, which prevents complete pressure drop without requiring continuous electronic monitoring or intervention. The system serves itself by automatically preventing malfunction conditions, reducing the safety burden on electronic control units.
2Ease of operation
If the system allows complete pressure drop in connecting lines during normal operation, then the ease of operation is improved, but the reliability is worsened due to potential malfunctions from pressure loss
Solution Approach 1:
The valve arrangement is designed to automatically prevent complete pressure drop in the connecting lines before a malfunction can occur. This beforehand cushioning measure ensures that minimum pressure is always maintained, preventing potential malfunctions while allowing full pressure adjustment range for normal operation.
3Reliability
If the tire pressure regulating system is designed with high safety requirements for electronic control units, then the reliability is improved, but the device complexity is worsened
Solution Approach 1:
The valve arrangement acts as an intermediary mechanical safety device between the electronic control unit and the pressure regulation function. It provides inherent safety by preventing complete pressure drop through mechanical means, thereby reducing the safety requirements and complexity burden on the electronic control unit while maintaining overall system reliability.
4Adaptability or versatility
If the system uses rotary couplings to transmit control signals and compressed air to rotating wheels, then the adaptability to wheel rotation is improved, but the device complexity is worsened due to additional components
Solution Approach 1:
The rotary coupling is designed to perform multiple functions simultaneously: transmitting compressed air for pressure regulation, transmitting control signals for valve actuation, and accommodating wheel rotation. This multi-functionality reduces the need for separate systems and components, thereby reducing overall device complexity while maintaining adaptability to wheel rotation.
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 system provides improved controllability and reliability in tire pressure adjustment, reducing wear on seals and minimizing the risk of pressure loss, thus enhancing the functional reliability and safety of the compressed air supply while lowering costs.
Implementation Method 1
at least one electromagnetically switchable switchover valve by which at least one main connecting line, which leads to an axle valve of a vehicle axle, is alternately connectable to a venting line which leads into the surrounding area or to a filling pressure line
Implementation Method 2
a filling pressure line which is connected via a pressure limiting valve to a compressed air source
Implementation Method 3
two-channel rotary couplings arranged between the vehicle axles and the associated vehicle wheels, each of the two-channel rotary couplings having a working connection for transmitting compressed air between the vehicle chassis-side sections and the wheel-side sections
Implementation Method 4
a valve arrangement by which a complete pressure drop in the air pressure in the wheel tires of the vehicle wheels via the switchover valve, the axle valves and the wheel valves can be automatically prevented
Data Source
AI summary
A tire pressure regulating system is disclosed for adjusting tire pressures of pneumatic tires of vehicle wheels of a plurality of vehicle axles of a motor vehicle while driving. The tire pressure regulating system comprises: at least one switchover valve, an axle valve, a wheel valve and a valve. A motor vehicle comprising the tire pressure regulating system is also disclosed.