Transmission Baffle Fluid Redirection Design
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Solution Overview
Problem
Conventional transmission baffle designs fail to effectively manage lubrication fluid accumulation, leading to frictional losses and drag on drive members due to fluid collection in the baffle sump, which can cause splashing and aeration, and result in inefficient fluid circulation and component exposure.
Innovation Solution
A baffle assembly with a scoop portion and wall structure that redirects accumulated fluid from the baffle sump into the transmission sump, utilizing arcuate sections and a wiper mechanism to prevent fluid buildup and facilitate fluid drainage, thereby reducing drag and frictional losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a baffle surrounds the drive member to contain transmission fluid, then lubrication is improved, but fluid accumulates in the baffle sump causing frictional losses and drag
Solution Approach 1:
The baffle is segmented into multiple functional zones: a containment zone that surrounds the drive member for lubrication, a drainage zone with openings that allows fluid to escape from the sump, and a redirection zone that guides fluid back to the transmission sump. This segmentation resolves the contradiction by allowing fluid containment where needed while providing escape paths where accumulation is harmful.
Solution Approach 2:
The baffle structure acts as an intermediary between the drive member and the transmission sump. It contains fluid near the drive member for lubrication while simultaneously providing a controlled pathway for excess fluid to drain and redirect, mediating between the need for lubrication and the need to prevent frictional losses.
2Reliability
If a baffle contains transmission fluid around the drive member, then component exposure to lubrication is improved, but fluid collection in the sump causes drag on the drive member
Solution Approach 1:
The baffle structure segments the fluid environment into a lubrication zone around the drive member and a drainage zone at the sump. The openings in the baffle create a transition zone that allows fluid to move from the containment area to the drainage area, ensuring components remain exposed to lubrication while preventing harmful fluid accumulation that causes drag.
3Productivity
If a baffle structure is added to manage fluid, then fluid circulation efficiency is improved, but device complexity increases
Solution Approach 1:
The baffle structure performs multiple functions simultaneously: it contains fluid for lubrication, provides drainage pathways for excess fluid, redirects fluid back to the transmission sump, and reduces drag on the drive member. By consolidating these multiple functions into a single integrated component, the design improves fluid circulation efficiency without proportionally increasing device complexity.
4Quantity of substance
If a baffle redirects fluid from the baffle sump into the transmission sump, then fluid accumulation is reduced, but manufacturing complexity increases
Solution Approach 1:
The baffle is designed with segmented features including openings and redirection pathways that are integrated into the overall structure. These segments can be formed using standard manufacturing processes for complex geometries, allowing the baffle to redirect fluid effectively while maintaining ease of manufacture through conventional production methods.
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 baffle assembly effectively reduces fluid accumulation in the baffle sump, minimizing drag on drive members and enhancing fluid circulation efficiency by redirecting fluid into the transmission sump, thus improving the operational performance of the transmission system.
Implementation Method 1
The baffle assembly effectively reduces fluid accumulation in the baffle sump, minimizing drag on drive members and enhancing fluid circulation efficiency by redirecting fluid into the transmission sump
Implementation Method 2
minimizing drag on drive members
Implementation Method 3
redirecting fluid into the transmission sump
Data Source
AI summary
A baffle for a transmission of a vehicle is provided. The transmission includes a gearbox that outputs torque to a differential, which distributes the torque to the wheels. A chain transfers the torque from the transmission to the differential. A baffle is provided adjacent to, but spaced from, the chain to contain and direct at least some of the lubricating fluid that the chain comes in contact with. The baffle has a base with a planar side surface. A flange extends from the base, and extends radially about part of the transmission output and the differential input to follow the path of the chain. One end of the flange is provided with an opening to direct fluid through the opening, out of the baffle and into other regions of the transmission such as the transmission sump. This inhibits buildup of fluid in the sump of the baffle.