Boomerang Control Arm Axial Load Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing three-point control arm arrangement in motor vehicle suspension faces a conflict between achieving comfort and acoustics on one hand and driving dynamics on the other, due to the loading of bearings with both transverse and longitudinal forces, which complicates the separation of transverse rigidity and longitudinal elasticity, leading to difficulties in ride comfort and acoustic decoupling.
Innovation Solution
A wheel suspension design featuring a sickle-shaped or boomerang-shaped three-point control arm divided into a transverse control arm region and a compression strut region, with a notch or gap to differentiate them, and a cross-sectional tapering to reduce axial loads on the front bearing, allowing for a softer transverse control arm bearing and improved flexibility, thus enhancing ride comfort and acoustic decoupling without additional construction complexity or cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the vehicle-body-side mounting absorbs both transverse and longitudinal forces with a soft rubber bearing, then longitudinal comfort and acoustic decoupling are improved, but transverse rigidity for driving dynamics deteriorates
Solution Approach 1:
The control arm is segmented into two functional regions: a transverse control arm region for transverse force transmission and a compression strut region for longitudinal force transmission. This segmentation allows each region to be optimized for its specific function, with the transverse region providing rigidity and the compression strut region providing elasticity through its geometric configuration
Solution Approach 2:
Different parts of the control arm are given different structural properties. The transverse control arm region has a configuration optimized for transverse rigidity, while the compression strut region has a geometry optimized for longitudinal elasticity. The notch or gap further differentiates these local qualities by separating the force transmission paths
2Strength
If a compound assembly with additional diagonal control arm and rubber bearing is used, then transverse rigidity and longitudinal elasticity are separated, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges the functions of the transverse control arm and compression strut into a single integral control arm component. This eliminates the need for separate diagonal control arms and additional rubber bearings, reducing device complexity while maintaining the separation of transverse and longitudinal force transmission functions through the integrated design
Solution Approach 2:
The single control arm component performs multiple functions: it provides transverse force transmission through the transverse control arm region, longitudinal force transmission through the compression strut region, and structural support for the wheel assembly. This multi-functionality eliminates the need for separate components while achieving the desired force separation
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 design optimizes the joint function of the control arm, reducing axial loads on the front bearing, improving ride comfort and acoustic decoupling, while minimizing additional structural complexity and cost by integrating the control arm as a single component, thus achieving a balance between comfort, acoustics, and driving dynamics.
Implementation Method 1
a cross-sectional tapering to reduce axial loads on the front bearing
Implementation Method 2
The rear bearing is generally designed as a relatively soft rubber bearing and, in the event of external longitudinal forces, provides a certain deformation path in order to ensure sufficient longitudinal suspension
Implementation Method 3
the control arm is loaded by longitudinal and transverse forces both in the longitudinal direction and in the transverse direction
Data Source
AI summary
A method controls a user interface and an air-conditioning unit of a vehicle. The user interface includes display and operating elements. The method displays a plurality of the elements on the user interface, receives at least two operation parameters of the air-conditioning unit, determines one or more display parameters for a first element from the plurality of elements on the basis of the at least two operation parameters, and displays the first element on the basis of the one or more display parameters.