Hydrokinetic Torque Coupling Elastic Blade Damping
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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 filtration quality and increasing manufacturing and mounting costs.
Innovation Solution
A hydrokinetic torque coupling device with damping means comprising an elastic blade supported by a supporting member, connected to a single flange that connects the turbine wheel and the torque output element, providing a smooth characteristic curve and reducing vibrations, weight, and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional hydrodynamic torque converters use multiple groups of elastic members arranged in series and parallel, then the angular stiffness can be adjusted at different angular positions, but vibrations and hysteresis occur due to the break of slope in the torque transmission curve
Solution Approach 1:
The patent changes the physical configuration of the elastic members from multiple groups in series and parallel to a single elastic blade with specific geometric parameters. By optimizing the blade's dimensions, material properties, and mounting configuration, the torque transmission curve achieves a smooth characteristic without break of slope, eliminating vibrations and hysteresis while maintaining the required angular stiffness throughout the angular travel range.
Solution Approach 2:
The patent merges multiple separate elastic members into a single integrated elastic blade structure. This unification simplifies the damping means while maintaining the functional requirement of providing angular stiffness. The single elastic blade connects the turbine wheel to the torque output element through a smooth elastic deformation characteristic, avoiding the discontinuous stiffness changes that occur with multiple discrete elastic members.
2Strength
If multiple groups of elastic members are used to provide damping, then angular stiffness can be controlled, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent merges multiple separate elastic members into a single integrated elastic blade structure. This unification simplifies the damping means while maintaining the functional requirement of providing angular stiffness. The single elastic blade connects the turbine wheel to the torque output element through a smooth elastic deformation characteristic, avoiding the discontinuous stiffness changes that occur with multiple discrete elastic members.
Solution Approach 2:
The single elastic blade performs multiple functions simultaneously: it provides angular stiffness, acts as a damping element, and serves as the connection between the turbine wheel and torque output element. This multi-functionality reduces the number of separate components needed and simplifies the overall device structure.
3Strength
If conventional torque converters use multiple elastic members, then damping function is achieved, but the radial overall dimension and weight increase
Solution Approach 1:
The patent merges multiple separate elastic members into a single integrated elastic blade structure. This unification simplifies the damping means while maintaining the functional requirement of providing angular stiffness. The single elastic blade connects the turbine wheel to the torque output element through a smooth elastic deformation characteristic, avoiding the discontinuous stiffness changes that occur with multiple discrete elastic members.
Solution Approach 2:
The elastic blade functions as a flexible structural element that provides damping through elastic deformation. By using a thin, flexible blade design, the patent achieves the required damping function with minimal material usage, reducing both weight and radial dimensions compared to conventional multi-member elastic damping systems.
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 reduces vibrations and enhances filtration quality while being easy to mount and cost-effective, with a reduced radial overall dimension and weight, improving the efficiency and reliability of torque transmission.
Implementation Method 1
the elastic blade being able to bend upon rotation of the torque input element relative to the torque output element in an engaged position
Implementation Method 2
an impeller wheel rotationally coupled to the torque input element and able to hydrokinetically drive a turbine wheel
Implementation Method 3
the damping means being adapted to act against the rotation of the torque input element relative to the torque output element
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), a torque output element (8) intended to be coupled to a transmission input shaft (2), clutch means (10) movable between an engaged position wherein the torque input element (11) and the torque output element (8) are rotationally coupled through damping means (23, 27), and a disengaged position wherein the torque input element (11) and the torque output element (8) are rotationally coupled through the impeller wheel (3), the turbine wheel and the damping means (23, 27).