Hydraulic Cross-Linked Suspension for Roll Stability and Articulation
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Solution Overview
Problem
Conventional sway bar assemblies in vehicle suspension systems face challenges in dynamically adjusting to various driving conditions, leading to compromises in roll stability, handling, and comfort, particularly during rock crawling and high-speed driving.
Innovation Solution
A cross-linked suspension system that hydraulically connects shock assemblies with valves and accumulators to dynamically control fluid flow, allowing for adjustable damping characteristics and eliminating the need for a traditional sway bar, enabling remote control of the system's stiffness and articulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional sway bar assembly is used, then roll stability is provided, but the system cannot dynamically adjust to various driving conditions
Solution Approach 1:
The patent applies dynamics by replacing the static sway bar with a dynamic hydraulic system that can adjust its characteristics in real-time. The shock assemblies include adjustable valves and accumulators that allow the system to adapt damping and stiffness parameters based on driving conditions, enabling transition between rock crawling and high-speed driving modes.
Solution Approach 2:
The patent uses hydraulics by implementing a cross-linked suspension system where shock assemblies are connected through hydraulic lines and a reservoir. The system uses fluid pressure and flow control through valves to dynamically adjust suspension characteristics, replacing the mechanical sway bar with a hydraulic cross-linking mechanism that provides both stability and adaptability.
2Device complexity
If traditional sway bars are used, then roll control is achieved, but system complexity and cost increase
Solution Approach 1:
The patent applies universality by making the shock assemblies perform multiple functions: they provide both roll control (replacing the sway bar function) and vertical suspension damping. The cross-linked hydraulic system serves dual purposes of maintaining vehicle stability and adapting to different driving conditions, eliminating the need for separate sway bar and shock assembly systems.
Solution Approach 2:
The patent extracts the traditional sway bar component entirely, removing its function and replacing it with the cross-linked hydraulic suspension system. This extraction simplifies the overall system architecture by eliminating redundant mechanical linkages and replacing them with a unified hydraulic control system that provides both roll control and adaptive damping.
3Speed
If shock assemblies are made stiffer for high-speed driving, then handling improves, but rock crawling performance deteriorates
Solution Approach 1:
The patent applies dynamics by implementing adjustable damping valves in the shock assemblies that can change their flow characteristics based on driving mode. The system can dynamically adjust from soft, compliant settings for rock crawling to stiff, responsive settings for high-speed driving, allowing optimal performance across different speed ranges and terrain conditions.
Solution Approach 2:
The patent uses parameter changes by modifying the damping coefficients and stiffness parameters of the shock assemblies through adjustable valves and accumulators. The system can change fluid flow parameters, pressure settings, and damping rates to optimize performance for either rock crawling (softer parameters) or high-speed driving (stiffer parameters), providing adaptability across different operating conditions.
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
The system provides enhanced roll stability and handling by allowing real-time adjustments to damping characteristics, improving vehicle performance across different driving conditions without the complexity and cost of traditional sway bars.
Implementation Method 1
a first line fluidly coupled with a first rebound chamber of the first shock assembly and a second compression chamber of the second shock assembly, to allow fluid to flow between the first rebound chamber and the second compression chamber
Implementation Method 2
a first compression valve fluidly coupled with the first compression chamber and the first line, to restrict fluid flow in at least one direction
Implementation Method 3
an accumulator fluidly coupled to the first line and the second line
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A cross-linked system (200) comprising: a first shock assembly (220L); a second shock assembly (220R); a first line (230L) fluidly coupled with a first rebound chamber of the first shock assembly (220L) and a second compression chamber of the second shock assembly (220R), to allow fluid to flow between the first rebound chamber and the second compression chamber; a second line (228L) fluidly coupled with a first compression chamber of the first shock assembly (220L) and a second rebound chamber of the second shock assembly (220R), to allow fluid to flow between the first compression chamber and the second rebound chamber; and a reservoir (226), wherein the reservoir fluidly coupled to the first line and the second line.