Torque Converter Damper Stop for Spring Overstress Protection
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Solution Overview
Problem
Existing hydrodynamic torque converters face damage to spring devices due to excessive stress, particularly during the start-up phase of motor vehicles, which affects their efficiency and longevity.
Innovation Solution
A hydrodynamic torque converter with a torsional vibration damper featuring an intermediate flange connected by helical compression springs, a centrifugal pendulum, and limited angle of rotation to prevent spring device blockage, ensuring effective torsional vibration isolation and protecting the springs from damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spring devices are designed to provide torsional vibration damping, then the vibration isolation is improved, but the spring devices are susceptible to destruction under excessive stress
Solution Approach 1:
The patent introduces a stop mechanism that limits the angle of rotation of the intermediate flange before excessive stress can damage the spring devices. This stop acts as a protective element that prevents the spring devices from being subjected to destructive loads by restricting the maximum angular displacement during torsional vibrations.
Solution Approach 2:
The stop mechanism serves as an intermediary element between the intermediate flange and the spring devices. It mediates the torsional motion by allowing controlled rotation within safe limits while blocking any rotation that would subject the spring devices to excessive stress, thus protecting them from destruction.
2Power
If the torque converter operates during start-up phase, then torque transmission is achieved, but the spring devices are subjected to excessive stress
Solution Approach 1:
The stop mechanism is pre-configured to limit the angle of rotation during high-torque operations such as start-up phase. This prevents excessive stress from being applied to the spring devices when the torque converter is subjected to maximum torque demands, thereby protecting them during the most stressful operating conditions.
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 transmits torque while protecting the spring devices from destruction, enhancing the durability and efficiency of the torque converter during start-up and operation by limiting the angle of rotation and distributing stress effectively.
Implementation Method 1
a centrifugal pendulum, and limited angle of rotation to prevent spring device blockage
Implementation Method 2
an intermediate flange connected by helical compression springs
Data Source
AI summary
A hydrodynamic torque converter and a torsional vibration damper for same, having a pump wheel connected on the drive side and a turbine wheel driven thereby, wherein a torsional vibration damper and an output part are provided between a housing of the hydrodynamic torque converter and an output hub. The torsional vibration damper having an input part that can be connected to the housing by a converter lock-up clutch, and said output part being connected to the output hub, wherein an intermediate flange arranged in each case counter to a spring device effective in the circumferential direction is provided between the input part and the output part. In order to protect the spring devices against damage in a manner not affecting the installation space, an angle of rotation of the intermediate flange counter to the effect of the spring devices is limited radially inside the spring devices.