Compliance Control Arm for Vehicle Suspension Alignment
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Solution Overview
Problem
Current suspension systems, such as multi-link and H-arm suspensions, face challenges in optimally controlling wheel alignment, leading to reduced ride comfort and difficulty in managing lateral forces and braking forces, which affects vehicle performance and spatial efficiency.
Innovation Solution
A suspension system incorporating a knuckle, an upper control arm, a lower H-arm control arm, and a compliance control arm, where the compliance control arm is strategically positioned between the lower control arm and the vehicle body, allowing for improved compliance behavior characteristics and maintaining vehicle dynamic behavior during vertical motion, thereby enhancing ride comfort and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a multi-link type suspension is used, then wheel alignment control is improved, but production cost increases and spatial efficiency deteriorates
Solution Approach 1:
The patent merges the functions of multiple separate control links into a single integrated lower control arm structure. Instead of using multiple independent links to achieve wheel alignment control, the invention combines these functions into one unified component that maintains precise wheel alignment while reducing the total number of parts and simplifying the suspension system.
2Device complexity
If a double wishbone or MacPherson strut suspension is used, then spatial efficiency is improved, but tow-in control and lateral stiffness become difficult to manage
Solution Approach 1:
The patent applies local quality by designing the lower control arm with specific geometric characteristics at different locations. The control arm features optimized connection point positions and angular relationships that provide enhanced tow-in control capability in critical areas while maintaining overall spatial efficiency. The specific arrangement of connection points and arm geometry creates localized stiffness and control characteristics where needed.
3Force
If an H-arm suspension is used, then lateral force absorption is improved, but ride comfort deteriorates and tow-in behavior control becomes difficult
Solution Approach 1:
The patent segments the force absorption functions by separating lateral force handling from vertical motion compliance. The lower control arm is designed to specifically manage lateral forces and tow-in behavior, while other suspension components handle vertical motion and ride comfort. This functional segmentation allows each component to optimize its performance without compromising the other.
Data Source
AI summary
A suspension system for a vehicle may include a knuckle rotatably supporting a wheel, and a lower control arm disposed along a vehicle's width direction and connecting the knuckle and a vehicle body, wherein the lower control arm includes a wheel-side end portion connected to a lower portion of the knuckle through a front lower external joint and a rear lower external joint, and two vehicle body-side end portions connected to the vehicle body through a front lower inner joint and a rear lower inner joint, the two vehicle body-side end portions including first and second vehicle body-side end portions, wherein the first vehicle body-side end portion among the two vehicle body-side end portions is connected to the vehicle body interposing a compliance control arm between the first vehicle body-side end portion and the vehicle body.