Fluidly Connected Axle Assemblies for Lubricant Distribution
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Solution Overview
Problem
Existing axle systems face inefficiencies in lubricant distribution and maintenance, leading to increased wear and reduced component life due to uneven lubricant levels and churning losses, especially when one differential is disconnected from the torque source.
Innovation Solution
The axle system incorporates a conduit network to fluidly connect front and rear axle assemblies, allowing lubricant to flow between them, and includes control mechanisms like valves and pumps to manage lubricant levels and distribution based on operational conditions, ensuring optimal lubrication and reducing frictional drag.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lubricant is stored in each axle assembly separately, then each axle can maintain its own lubricant level, but this leads to uneven lubricant distribution and increased churning losses when one differential is disconnected
Solution Approach 1:
The patent combines the lubricant storage systems of multiple axle assemblies into a shared reservoir. The reservoir is fluidly connected to all axle assemblies through conduits, allowing lubricant to be shared across the entire vehicle. This merging eliminates the problem of uneven lubricant distribution in disconnected axles and reduces churning losses by allowing disconnected differentials to operate with minimal or no lubricant in their housings.
2Use of energy by moving object
If a disconnectable differential is isolated from the torque source, then fuel economy improves, but lubricant distribution becomes uneven and component wear increases
Solution Approach 1:
The system dynamically adjusts lubricant distribution based on the operational state of each differential. When a differential is disconnected, the fluid connection allows lubricant to flow away from that axle assembly, reducing lubricant level in the housing. This dynamic adaptation enables the system to maintain fuel economy benefits of disconnection while still providing lubricant protection when needed.
3Loss of energy
If multiple axle assemblies are fluidly connected for shared lubricant, then lubricant distribution improves and churning losses reduce, but system complexity increases
Solution Approach 1:
The shared reservoir serves multiple functions: it stores lubricant for the entire vehicle, acts as a balancing chamber to equalize lubricant levels across all axle assemblies, and provides a return path for lubricant flow. This multi-functionality reduces the need for additional separate components and simplifies the overall system architecture despite the fluid connections between multiple axles.
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 solution improves lubricant distribution, maintains consistent lubricant levels, reduces churning losses, and enhances the operating efficiency and fuel economy of the vehicle by intelligently controlling lubricant flow between axle assemblies.
Implementation Method 1
The conduit may fluidly connect the first axle assembly to the second axle assembly such that lubricant may flow between the first housing assembly and the second housing assembly
Data Source
AI summary
An axle system having a first axle assembly, a second axle assembly, and a conduit. The conduit may fluidly connect the first axle assembly to the second axle assembly such that lubricant may flow between a first housing assembly of the first axle assembly and a second housing assembly of the second axle assembly.