Pinned Driveline Venting to Prevent Lubricant Bubble Expulsion
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Solution Overview
Problem
Existing breather vent configurations in vehicle driveline components can expel lubricating fluid when bubbles form in the lubricating fluid and enter the breather vent, leading to unintended fluid expulsion.
Innovation Solution
A vehicle driveline component design featuring a tubular body with a relief valve, vent cover, and pin, where the pin extends through the tubular body's interior surface, preventing lubricant bubbles from reaching the relief valve by bursting them upon contact, thus preventing fluid expulsion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a breather vent is used to permit air exchange when differential pressure exceeds a threshold, then pressure relief is improved, but lubricating fluid may be expelled when bubbles enter the vent
Solution Approach 1:
The pin acts as an intermediary element positioned within the tubular body to intercept and burst lubricant bubbles before they reach the relief valve. This mediator prevents the harmful interaction between bubbles and the relief valve mechanism, allowing pressure relief while preventing fluid loss.
Solution Approach 2:
The pin is positioned in advance within the tubular body to preemptively burst lubricant bubbles before they can travel to and expel through the relief valve. This preliminary action of bubble interception and rupture prevents the subsequent harmful effect of fluid expulsion during normal pressure relief operation.
2Reliability
If the pin extends through the interior circumferential surface into the hollow interior, then bubble interception is improved, but device complexity increases
Solution Approach 1:
The breather vent assembly is segmented into distinct functional components: the tubular body for structural support, the relief valve for pressure regulation, and the pin for bubble interception. This segmentation allows each component to perform its specific function efficiently while maintaining overall system reliability.
Solution Approach 2:
The pin serves as a simple intermediary element that provides bubble interception functionality without requiring complex mechanisms. Its straightforward design extending through the tubular body's interior circumferential surface achieves reliable bubble prevention while minimizing added structural complexity.
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
Effectively prevents lubricant bubbles from exiting the breather vent, ensuring that lubricating fluid remains within the driveline component during operation by utilizing the pin to burst bubbles before they can reach the relief valve.
Implementation Method 1
the pin extends through the interior circumferential surface into a hollow interior of the tubular body... preventing lubricant bubbles from reaching the relief valve by bursting them upon contact
Data Source
AI summary
A vehicle driveline component that includes a tubular body, a relief valve, a vent cover and a pin. The tubular body has a first and second axial ends and defines an interior circumferential surface. The relief valve is mounted in the tubular body between the first and second axial ends. The vent cover is mounted to the tubular body and covers the second axial end. The pin is mounted to the tubular body at a location between the first axial end and the relief valve. The pin extends through the interior circumferential surface into a hollow interior of the tubular body.