Vehicle Control Arm Sacrificial Ribs for Impact Erosion
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Solution Overview
Problem
Current vehicle materials used to withstand impact abrasion are too heavy due to the need for robustness, leading to high fuel consumption, and using lighter materials exacerbates the issue of impact erosion.
Innovation Solution
A structural component with sacrificial surface features that concentrate impact erosion, allowing the use of lighter materials while maintaining the integrity and function of the vehicle, even when these features are partially or totally removed by abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If robust materials such as cast steel are used to withstand impact abrasion, then the resistance to impact erosion is improved, but the vehicle weight increases leading to high fuel consumption
Solution Approach 1:
The underlying surface is segmented into sacrificial regions (surface features like ribs, protrusions, or coatings) and protected regions. The sacrificial regions are designed to erode preferentially, absorbing impact damage while preserving the main structural component. This segmentation allows the use of lighter materials for the main structure while maintaining erosion resistance through the sacrificial elements.
Solution Approach 2:
The sacrificial regions are designed as consumable elements that are intentionally made to erode or be removed during vehicle operation. These short-living features (such as thin ribs, protrusions, or coating layers) are replaced or renewed when worn, protecting the more valuable and lighter main structural component from permanent damage.
2Use of energy by moving object
If lighter materials are used to reduce vehicle weight and fuel consumption, then the fuel efficiency is improved, but the resistance to impact erosion worsens
Solution Approach 1:
The component is divided into a main structural body made of lightweight material and sacrificial surface features that provide erosion protection. The lightweight material (such as aluminum or aluminum alloys) is used for the main structure to reduce fuel consumption, while the sacrificial regions (ribs, protrusions, or coatings) are designed to absorb impact erosion, compensating for the lower inherent erosion resistance of the lighter material.
Solution Approach 2:
Different regions of the component have different properties: the main structural body is optimized for weight reduction using lightweight materials, while specific local regions (surface features) are designed with enhanced erosion resistance or sacrificial characteristics. This local differentiation allows the component to simultaneously achieve low weight and adequate erosion protection where needed.
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 approach reduces vehicle weight and fuel consumption while protecting the underlying surfaces from impact erosion, allowing for visual inspection and timely replacement of components, thus maintaining vehicle performance.
Implementation Method 1
the underlying surface having a configuration in which the impact erosion is concentrated on one or more surface features, the arrangement being such that the surface features constitute sacrificial regions which become eroded thereby to at least partly protect the remainder of the surface from impact erosion
Data Source
AI summary
A structural component 1 is provided for a vehicle designed for driving off-road on rough terrain. The component 1, such as the lower control arm of a suspension system, is formed from aluminum, aluminum-alloy or other light-weight material and provided on its underside with a parallel arrangement of chamfered ribs 5 which extend in the direction of travel of the vehicle. The spacing between adjacent ribs 5 is less than or equal to 10 mm so as to prevent underlying rocks and stones 7 from impacting, and thereby abrading the inner surface 3 of the component 1. The ribs 5 are provided as sacrificial elements and will become eroded in use until they no longer provide the desired protection of the inner surface 3. The extent of abrasion of the ribs 5 can be ascertained by a visual inspection of the underlying surface of the vehicle, and, if necessary, the component 1 can be replaced.