Vehicle Parting Seal Hardness Layout for Door Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing parting seals in vehicles fail to effectively reduce road noise, wind noise, and other vibrations due to the vibration of doors during travel, and can be damaged or protrude, affecting appearance and noise levels.
Innovation Solution
A parting seal with a seal portion and mounting base formed of higher hardness materials, connected by a softer connecting portion, allowing vibration propagation while preventing deformation and protrusion, and featuring an inclined portion for enhanced contact and vibration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the seal portion is made of softer material to allow deformation during door closing, then the door closing operation is smooth, but the vibration propagation efficiency is reduced and noise reduction is insufficient
Solution Approach 1:
The parting seal is divided into three distinct portions with different hardness: the seal portion (first hardness), the connecting portion (second hardness, softer than seal portion), and the mounting base (third hardness, same as or harder than seal portion). This segmentation allows each portion to perform its specific function - the softer connecting portion ensures smooth door closing by deforming during closure, while the harder seal portion and mounting base efficiently propagate vibrations to reduce noise.
Solution Approach 2:
Different portions of the parting seal are assigned different local qualities (hardness values) to optimize their respective functions. The seal portion has higher hardness for vibration propagation, the connecting portion has lower hardness for flexible deformation during door closing, and the mounting base has high hardness for stable vibration transmission to the vehicle body.
2Object-affected harmful factors
If the seal portion is made of harder material to improve vibration propagation, then noise reduction is improved, but the door closing operation may be affected and the seal portion may protrude
Solution Approach 1:
The parting seal is segmented into portions with different hardness values. The seal portion uses harder material for effective vibration propagation and noise reduction, while the connecting portion uses softer material to ensure smooth door closing operation by deforming during the closing process, thus resolving the contradiction between vibration propagation and ease of operation.
Solution Approach 2:
The seal portion is given locally higher hardness compared to the connecting portion, allowing it to effectively propagate vibrations while the softer connecting portion accommodates the door closing movement, preventing operational issues despite the harder seal material.
3Object-affected harmful factors
If the seal portion is made of harder material to improve vibration propagation, then noise reduction is improved, but the seal portion may deform and protrude affecting appearance
Solution Approach 1:
The parting seal is divided into portions with different hardness characteristics. The seal portion uses harder material for effective vibration propagation and noise reduction, while the mounting base provides a rigid foundation. This segmentation allows the seal portion to maintain its shape during vibration propagation without deforming and protruding, as the harder material combined with proper mounting prevents excessive deformation.
Solution Approach 2:
The seal portion is assigned locally higher hardness to resist deformation during vibration propagation, while the connecting portion has lower hardness to allow controlled deformation during door closing. This local quality differentiation ensures the seal portion maintains its shape and appearance while effectively reducing noise.
4Ease of manufacture
If the entire seal is made of uniform hardness material, then the manufacturing is simple, but the vibration propagation efficiency is insufficient and noise reduction is poor
Solution Approach 1:
Instead of uniform hardness throughout, the parting seal implements local quality variations with different hardness values in different portions. The seal portion and mounting base have higher hardness for effective vibration propagation and noise reduction, while the connecting portion has lower hardness for flexible deformation during door closing. This can be achieved through multi-step molding or assembling different components, balancing manufacturing feasibility with performance requirements.
Solution Approach 2:
The parting seal uses composite construction with materials of different hardness values in different portions. This could involve using different rubber compounds, different densities of the same material, or assembling multiple components with varying hardness characteristics, thereby achieving superior vibration propagation and noise reduction while maintaining manufacturing practicality.
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
Efficiently reduces road and wind noise vibrations by propagating door vibrations to the seal and mounting base, maintaining door operation and appearance, with improved contact efficiency.
Implementation Method 1
when the seal portion, which has increased rigidity due to higher hardness, comes into contact with the first member, the vibration of the first member can be propagated to the seal portion, propagated from the seal portion to the mounting base, and further propagated from the mounting base to the second member
Data Source
AI summary
In a parting seal that seals a gap between a front door and a rear door, one end of a seal portion, including a substantially arc shape, and one end of a mounting base, including a substantially L shape, are connected by a connecting portion, the seal portion and the mounting base are formed of a material with higher hardness compared to the connecting portion, and a seal-portion distal end, located on the side opposite to the connecting portion in the seal portion, is in contact with the mounting base when the front door is closed.