Rear Suspension Knuckle Layout for Independent Wheel Torque Control
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Solution Overview
Problem
Current vehicle suspension systems lack efficient independent control and alignment, leading to reduced stability, traction, and increased wear on tires, particularly in heavy-duty applications like class 8 trucks, where complex drive-shafts and differentials add weight and mechanical complexity.
Innovation Solution
The implementation of a rear suspension system with a knuckle that supports the rear wheel, featuring upper and lower control arms aligned vertically, and dual motor gearboxes positioned between wheels, allowing for independent torque control and regenerative braking, which reduces weight and mechanical complexity while enhancing suspension travel and traction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If complex drive-shafts and differentials are used in traditional suspension systems, then power transmission to rear wheels is achieved, but weight and mechanical complexity increase
Solution Approach 1:
The patent divides the power transmission system into separate independent units at each wheel, with motor gearboxes positioned between the wheels rather than using a centralized differential and drive-shaft system. This segmentation eliminates the need for complex mechanical power transmission components while maintaining effective power delivery to each rear wheel independently.
Solution Approach 2:
The patent replaces the traditional mechanical drive-shaft and differential system with electric motor gearboxes that provide power transmission through electrical rather than mechanical means. This substitution significantly reduces mechanical complexity while achieving the same power transmission function.
2Stability of the object's composition
If traditional suspension systems are used, then basic wheel support is provided, but independent wheel control and alignment are lacking, reducing stability and traction
Solution Approach 1:
The suspension system is divided into independent control units for each wheel, with individual motor gearboxes and control arms that can independently adjust and control each wheel's position and alignment. This segmentation enables precise independent wheel control that improves stability and traction.
Solution Approach 2:
The suspension system incorporates dynamic control capabilities through motorized actuation of control arms and alignment mechanisms, allowing real-time adjustment of wheel position and orientation. This dynamic control enables the system to adapt to varying road conditions and maintain optimal stability and traction.
Data Source
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AI summary
A rear suspension for a vehicle includes a knuckle for supporting a rear wheel of the vehicle, and the knuckle defines an opening. The rear suspension system further includes two suspension devices configured to be connected to the vehicle and an upper portion of the knuckle, such that each suspension device is oriented along an upright axis when the rear suspension system is mounted on the vehicle. In addition, the rear suspension system includes a control arm having a first portion configured to be connected to the vehicle and a second portion configured to extend between the axes of the suspension devices and into the opening of the knuckle when the rear suspension system is mounted on the vehicle.