Hybrid Run-Flat Tire Buffering Structure for Military Vehicles
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Solution Overview
Problem
Existing run-flat tire technologies for military vehicles increase vehicle weight and compromise ride comfort and high-speed endurance when thick sidewalls are used, and separate cylinder damper systems affect fuel economy and cornering capabilities.
Innovation Solution
A hybrid run-flat system with three coupled run-flats, a buffer member on the outer surface, and lubricated grooves to reduce impact and friction, allowing the vehicle to run smoothly even with a punctured tire, featuring a buffer space inside the buffer member with different shapes for enhanced impact relief.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the sidewall is increased to support vehicle weight upon puncture, then the run-flat capability is improved, but the tire weight is increased and ride comfort is adversely affected
Solution Approach 1:
The invention divides the tire structure into distinct segments: a standard thickness sidewall and a separate run-flat device. The run-flat device is further segmented into a support ring and multiple support members that can be independently positioned. This segmentation allows the tire to maintain normal weight while providing run-flat capability through the auxiliary support structure that activates only when needed.
Solution Approach 2:
The invention introduces an intermediary run-flat device that acts as a mediator between the tire and the ground. When the tire is punctured, the support members of the run-flat device extend to provide mechanical support, replacing the function that would otherwise require a thickened sidewall. This intermediary structure enables run-flat capability without modifying the original tire's weight or comfort characteristics.
2Reliability
If the thickness of the sidewall is increased to allow running upon puncture, then the run-flat capability is improved, but the high-speed endurance time is shortened
Solution Approach 1:
The run-flat device is segmented into a rigid support ring and multiple adjustable support members. This segmentation allows the support members to be positioned optimally for high-speed operation, distributing loads more effectively than a monolithic thick sidewall. The segmented structure reduces vibration and heat buildup, thereby extending high-speed endurance time while maintaining run-flat capability.
3Reliability
If a separate cylinder damper system is used to support the tire, then the run-flat capability is improved, but the vehicle weight is increased and fuel economy is affected
Solution Approach 1:
The invention merges the run-flat support function with the existing wheel assembly by integrating the support ring and support members directly onto the wheel rim. This consolidation eliminates the need for separate cylinder damper systems, reducing overall vehicle weight while maintaining run-flat capability. The support members are designed to work in conjunction with the wheel structure rather than as add-on components.
Solution Approach 2:
The support members act as intermediaries that provide mechanical support during run-flat conditions without requiring heavy hydraulic or pneumatic systems. These members are designed to bear the vehicle weight through simple mechanical leverage on the wheel rim, avoiding the weight penalty of complex damper systems while achieving the same run-flat support function.
4Reliability
If a separate cylinder damper system is used to support the tire, then the run-flat capability is improved, but the cornering capability is compromised
Solution Approach 1:
The support members are designed to be dynamically adjustable rather than fixed. They can be positioned at different locations around the support ring and can be repositioned as needed. This dynamic configuration allows the system to adapt to different driving conditions, including cornering maneuvers, by optimizing the distribution of support forces. The support members can be tilted or angled to provide appropriate lateral support during turns, maintaining cornering capability that would be lost with rigid damper systems.
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 safe and comfortable driving on a punctured tire by reducing impact and friction, maintaining steering performance and extending high-speed endurance without increasing vehicle weight or compromising fuel economy.
Implementation Method 1
a plurality of grooves 21 are spaced apart from each other on an outer circumferential surface of the buffer member in a longitudinal direction to prevent a damage due to friction by using a lubricant 22 filled in the groove 21
Implementation Method 2
a buffer member 20 formed of a material different from the run-flat 10 and provided on an outer circumferential surface of the run-flat 10 to buffer an impact transferred to the military vehicle when a tire T on the outer circumferential surface of the run-flat 10 punctures
Data Source
AI summary
The present invention relates to a hybrid run-flat having a buffering structure for a military vehicle, and more particularly, to a hybrid run-flat having a buffering structure for a military vehicle wherein a buffer member famed of a material different from the run-flat is provided on an outer circumferential surface of the run-flat of the military vehicle to enable a driving due to the buffer member even when a tire punctures, in which a groove for a lubricant is formed on an outer circumferential surface of the buffer member, and a buffer space as an empty space is famed therein, so that the impact relief effect is increased.