Hydrokinetic Torque Coupling Damping Blade Design
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Solution Overview
Problem
Conventional hydrodynamic torque converters experience vibrations and hysteresis due to the break of slope in the torque transmission curve, affecting the quality of filtration and operational efficiency.
Innovation Solution
A hydrokinetic torque coupling device with damping means comprising an elastic blade and a supporting member, mounted on flanges with a bearing, providing a gradual torque transmission curve without slope breaks, and including a clutch mechanism for rotational coupling and uncoupling, which reduces vibrations and improves filtration quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a second group of elastic members is added to increase stiffness at the end of angular travel, then the angular stiffness increases, but vibrations and hysteresis are generated due to the break of slope in the torque transmission curve
Solution Approach 1:
The patent changes the physical configuration parameter of the elastic members by transitioning from a discrete multi-group arrangement to a continuous blade structure. This parameter change eliminates the abrupt stiffness transition (break of slope) while maintaining the necessary angular stiffness through the blade's geometric design and material properties.
Solution Approach 2:
The patent introduces an intermediary bearing mechanism between the first and second flanges that enables smooth rotational movement. This intermediary element mediates the torque transmission process, allowing gradual engagement and disengagement that prevents sudden stiffness changes and the associated vibrations and hysteresis.
2Stability of the object's composition
If elastic members are arranged in series through a phasing member, then the elastic members are deformed in phase, but the device complexity increases with multiple components
Solution Approach 1:
The patent merges multiple discrete elastic members and the phasing member into a single integrated elastic blade structure. This blade is directly mounted between the flanges and inherently provides phase-synchronized deformation through its continuous geometry, eliminating the need for separate components while maintaining the desired deformation characteristics.
Solution Approach 2:
The elastic blade serves multiple functions simultaneously: it provides the necessary elastic deformation, ensures phase synchronization, and directly couples the flanges without requiring additional phasing members. This multi-functional design reduces device complexity while maintaining stability.
3Ease of operation
If a bearing is mounted between flanges to enable pivoting, then rotational guidance is improved, but the device complexity increases
Solution Approach 1:
The bearing acts as an intermediary element that facilitates smooth rotational movement between the flanges. It provides the necessary rotational guidance while minimizing friction and wear, enabling the second flange to pivot relative to the first flange during clutch engagement and disengagement.
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 vibrations and enhances filtration quality while being easy to mount and cost-effective, ensuring correct rotational guidance and maintaining the torque converter's efficiency across a wider angular displacement.
Implementation Method 1
the blade being adapted to bend upon rotation of the torque input element relative to the torque output element
Implementation Method 2
with a bearing being mounted between the first flange and the second flange
Implementation Method 3
an impeller wheel rotationally coupled to the torque input element and able to hydrokinetically drive the turbine wheel
Data Source
AI summary
The invention relates to a hydrokinetic torque coupling device for a motor vehicle, comprising a torque input element (11) intended to be coupled to a crankshaft (1), an impeller wheel (3) rotationally coupled to the torque input element (11) and able to hydrokinetically drive a turbine wheel (4) through a reactor (5), a torque output element (8) intended to be coupled to a transmission input shaft (2), clutch means (10) adapted to rotationally couple the torque input element (11) and the torque output element (8) in an engaged position, through damping means (22, 26), and adapted to rotationally uncouple the torque input element (11) and the torque output element (8) in a disengaged position.