Damper Device Torque Distribution Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional damper devices struggle to effectively suppress engine torsional vibration over a wide range of engine revolutions, as they cannot easily exclude the resonance point from both low and high revolution regions, leading to inadequate damping across the entire frequency spectrum.
Innovation Solution
A damper device with a torque distribution mechanism using a planetary gear train, featuring two input and output paths with elastic members and clutches that can be switched between engaged and released states, allowing for adjustment of the resonance point and improved damping characteristics across a wide frequency range by modifying the output path with a second spring in the second output path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional damper devices use simple mass and spring constant adjustment, then the structure remains simple, but the resonance point cannot be excluded from the wide revolution region
Solution Approach 1:
The damper device is segmented into multiple independent damping paths (first damping path with first spring, second damping path with second spring). Each path can independently target different resonance regions, allowing the system to exclude resonance points across a wide revolution range without requiring a completely complex redesign of the entire structure.
Solution Approach 2:
The invention introduces a variable damping characteristic through the second clutch that can switch the second damping path on or off based on operating conditions. This dynamic adjustment allows the resonance point to be excluded from different revolution regions as needed, enhancing adaptability without permanently increasing structural complexity.
2Adaptability or versatility
If a single spring system is used in conventional dampers, then the device complexity is low, but the resonance point cannot be excluded from both low and high revolution regions
Solution Approach 1:
The single spring system is segmented into two separate spring systems (first spring in first damping path, second spring in second damping path). Each spring can be tuned to target specific resonance regions, enabling the system to exclude resonance points from both low and high revolution regions simultaneously.
Solution Approach 2:
The second clutch acts as an intermediary that selectively engages or disengages the second damping path based on operating conditions. This allows the system to activate the appropriate damping path for the current revolution range, achieving wide resonance exclusion coverage while managing the complexity introduced by having two spring systems.
3Productivity
If the resonance point remains in the low frequency region, then the simple spring system maintains its function, but torsional vibration cannot be suppressed across the entire frequency range
Solution Approach 1:
The system dynamically switches between different damping paths using the second clutch based on the operating revolution range. When operating in low revolution regions, the first damping path handles vibration suppression. When operating in high revolution regions, the second damping path is activated to suppress vibrations, ensuring effective torsional vibration suppression across the entire frequency range.
Solution Approach 2:
The invention changes the effective spring constant parameter by switching between different spring systems. The first spring has one spring constant optimized for low frequency regions, while the second spring has a different spring constant optimized for high frequency regions. This parameter change allows the system to maintain effective vibration suppression across the entire frequency range.
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 provides effective damping of torsional vibration across the entire frequency range, enhancing vehicle quality, reducing transmission load, and improving fuel efficiency by shifting the resonance point out of the low frequency region, thereby reducing vibration and noise.
Implementation Method 1
a first input element connected to the engine, a second input element connected to the engine via a first elastic member... a first output element connected to the transmission, and a second output element connected to the transmission via a second elastic member
Data Source
AI summary
A damper device is provided between an engine and a transmission and has a torque distribution mechanism that is provided with a first input element connected to the engine, a second input element connected to the engine via a first elastic member, a first output element connected to transmission, and a second output element connected to the transmission via a second elastic member. The damper device further has a first clutch that is provided between the first output element and the transmission and that is switched between an engaged state of connecting the first output element to the transmission and a released state of disconnecting the first output element from the transmission, and a second clutch that is provided between the second output element and the transmission and that is switched between an engaged state of connecting the second output element to the transmission and a released state of disconnecting the second output element from the transmission.