Transmission Damper Fluid Guide to Reduce Oil Foaming Drag
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In motor vehicle drive trains, the formation of oil foam and swirling of transmission oil around the damper leads to increased hydraulic drag and the risk of oil leakage, particularly during brake applications and downhill travel.
Innovation Solution
A damper arrangement incorporating a fluid guide element with strategically designed ducts that convey the swirling fluid away from the damper, utilizing an annular structure with beveled and concave features to enhance fluid flow and prevent radial slung-off, thereby reducing foaming and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the damper rotates at high speed to dampen torsional vibrations, then the damping effect is improved, but the transmission oil is churned and turbulently swirled up, leading to oil foam formation and increased hydraulic drag
Solution Approach 1:
The patent extracts the harmful swirling fluid from the damper environment by introducing a fluid guide element with ducts that actively remove the churned transmission oil from around the rotating damper, preventing it from forming foam and causing hydraulic drag while allowing the damper to continue rotating at high speed for effective vibration damping
2Reliability
If the transmission oil advances out of the oil sump during brake application and downhill travel, then the lubrication coverage is improved, but the oil level rises and causes increased drag torque of the damper
Solution Approach 1:
The fluid guide element acts as an intermediary structure between the transmission oil and the damper. It provides a controlled pathway (ducts) for the oil to be guided away from the damper, mediating between the need for oil circulation during braking and the need to prevent excessive oil level and drag torque
3Temperature
If the transmission oil is swirled around by the damper, then the cooling effect is improved, but the oil may leak out of the transmission breather
Solution Approach 1:
The patent converts the harmful effect of swirled oil (which could lead to leakage) into a beneficial controlled flow path. The fluid guide element's ducts capture the swirled oil and channel it in a controlled manner, maintaining the cooling effect while preventing uncontrolled leakage through the breather
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 solution effectively reduces fluid foaming and swirling, minimizing drag torque and preventing oil leakage, ensuring efficient lubrication and cooling in the transmission system.
Implementation Method 1
The damper masses become displaced, due to centrifugal force, in a radial direction and in the circumferential direction and, as a result, dampen torsional vibrations of the drive train
Implementation Method 2
Due to the rotation of the damper, a fluid surrounding the damper, in sections, is conveyed into the duct
Data Source
AI summary
A damper arrangement for a motor vehicle drive train includes a damper (120) for damping torsional vibrations and a rotationally fixed fluid guide element (110). The fluid guide element (110) is axially adjacent to the damper (120). The damper (120) has at least one duct (112-1, 112-2, 112-3). A fluid (140) that at least partially surrounds the damper (120) is conveyed through the at least one duct (112-1, 112-2, 112-3) when the damper (120) rotates.