Off-Road Tire Pressure Layout for Multi-Axle Wheel Control
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Solution Overview
Problem
Existing tire pressure control devices for off-road vehicles are costly and inefficient when adapting to vehicles with more than two axles, as they require significant additional components and installation space, and are not optimized for individual wheel pressure adjustments, leading to suboptimal tire pressure changes due to axle-by-axle compressed air supply and deaeration.
Innovation Solution
A tire pressure control device with a crossed arrangement of supply pressure lines and control pressure lines, where each vehicle axle has a control valve and each vehicle side has a supply valve, allowing for efficient actuation and control of wheel valves, enabling adaptable and cost-effective expansion to multiple axles without additional supply valves, and allowing for simultaneous pressure adjustments across multiple wheels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional tire pressure control device with parallel supply pressure lines and control pressure lines is used, then the system can control tire pressure for two axles, but the device complexity and cost increase significantly when adapting to vehicles with more than two axles
Solution Approach 1:
The patent merges the functions of supply pressure lines and control pressure lines into a single integrated pneumatic line system. Instead of maintaining separate parallel lines for supply and control pressures, the invention uses a unified line structure that distributes pneumatic pressure to both supply valves and control valves across multiple axles, thereby reducing the number of components and simplifying the overall system architecture while maintaining full functionality for multi-axle vehicles.
Solution Approach 2:
The pneumatic lines in the invention are designed to serve multiple functions simultaneously. The same pneumatic distribution network provides both supply pressure to the supply valves and control pressure to the control valves for all vehicle axles. This multi-functional design eliminates the need for dedicated separate line systems, making the device complexity independent of the number of axles and enabling cost-effective adaptation to vehicles with any number of axles.
2Reliability
If additional supply valves and control valves are added for each additional axle, then complete tire pressure control for each axle is achieved, but the component quantity and installation space requirements increase
Solution Approach 1:
The patent segments the tire pressure control system into modular units distributed across different vehicle sides rather than replicating complete systems for each axle. Each vehicle side has its own supply valve and associated control valve, which can independently manage tire pressure for all axles on that side. This segmentation allows the system to maintain complete control functionality while reducing the total number of valves needed compared to a per-axle replication approach.
Solution Approach 2:
The invention transitions from a traditional axle-by-axle valuation approach to a vehicle-side dimensional organization. Instead of adding one complete set of valves per axle, the system organizes valves by vehicle side (left/right), allowing a single supply valve per side to serve multiple axles on that side through the integrated pneumatic distribution. This dimensional reorganization reduces component quantity while maintaining control completeness across all axles.
3Stability of the object's composition
If axle-by-axle compressed air supply is used, then systematic pressure control is achieved, but the time required for tire pressure reduction increases
Solution Approach 1:
The patent enables continuous and simultaneous tire pressure reduction across multiple axles by activating both left and right supply valves concurrently. When tire pressure needs to be reduced, the system opens both supply valves at the same time, allowing compressed air to escape from all affected tires simultaneously rather than sequentially. This continuous parallel action maintains systematic control while dramatically reducing the total time required for pressure reduction compared to sequential axle-by-axle operation.
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 component and installation costs, improves operating convenience, and optimizes tire pressure control by allowing individual wheel adjustments and simultaneous pressure changes across multiple axles, reducing the duration of tire pressure reduction and minimizing the impact of varying tire sizes.
Implementation Method 1
a compressed air supply device (6), in which compressed air can be supplied to the pneumatic tires (2a, 2b, 3a, 3b)
Implementation Method 2
the wheel valves (4a, 4b, 5a, 5b) can be switched to establish a pressure connection to the supply pressure lines (V1, V2) or to be blocked from them, so that the pneumatic tires (2a, 2b, 3a, 3b) can be aerated or deaerated
Data Source
AI summary
A tire pressure control device of an off-road vehicle is configured for changing tire pressures of vehicle wheels of at least one vehicle axle. Each pneumatic tire has a pressure-controlled wheel valve which is pneumatically connected to a control pressure line and to a supply pressure line. The control pressure lines and the supply pressure lines are pneumatically connected to a compressed air supply device and controlled by an electronic control unit. The actuation of the wheel valves takes place axle by axle via control valves, and the compressed air supply of the vehicle wheels is carried out by side via supply valves.