Vehicle Extractor Grille Cushioning for Valve Rattle Reduction
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Solution Overview
Problem
The existing extractor grille devices in vehicles often produce a rattling noise due to the vibration of the valve when the vehicle is in motion, causing discomfort to passengers.
Innovation Solution
The extractor grille device incorporates a noise reduction part, such as an elastic member made of foamed polyurethane foam, coupled to the grille housing to prevent direct collision between the valve and the housing, along with a valve opening guide part to restrict the opening angle of the valve, thereby reducing noise and collision strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the valve is made rotatable to open or close the opening portion, then the ventilation function is improved, but the valve vibrates and creates rattling noise during vehicle travel
Solution Approach 1:
The patent introduces a noise reduction part as an intermediary element between the valve and the grille housing. This noise reduction part absorbs the collision between the valve and housing, preventing direct contact and the resulting rattling noise while allowing the valve to maintain its rotatable ventilation control function
Solution Approach 2:
The noise reduction part is pre-installed on the grille housing before the valve operation. It provides cushioning protection in advance, so when the valve moves during vehicle travel, the cushioning is already in place to prevent direct collision and noise generation
2Productivity
If the valve is allowed to open freely, then the ventilation efficiency is improved, but the valve collides with the grille housing causing noise and discomfort
Solution Approach 1:
The valve opening guide part is designed to preemptively guide the valve's movement path. By providing guide portions that extend from the frame, the system pre-establishes constraints on the valve's opening angle, preventing the valve from colliding with the grille housing while still allowing sufficient opening for effective ventilation
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 noise reduction part effectively minimizes the rattling noise caused by valve collisions, while the valve opening guide part reduces the strength of valve collisions with the housing, enhancing passenger comfort.
Implementation Method 1
a noise reduction part coupled to and protruding from one surface of the grille housing around the opening portion so that the valve does not collide directly with the grille housing when the valve is opened or closed. Further, the noise reduction part may be an elastic member having elasticity.
Implementation Method 2
the elastic member may be foamed polyurethane foam (PU-foam)
Data Source
AI summary
An extractor grille device for a vehicle, which is mounted in a vehicle and used to discharge air in the vehicle to the outside. The extractor grille device includes: a grille housing mounted in the vehicle and having an opening portion, a valve coupled to the grille housing and configured to be rotatable about a hinge shaft and open or close the opening portion, and a noise reduction part coupled to and protruding from one surface of the grille housing around the opening portion so that the valve does not collide directly with the grille housing when the valve is opened or closed, thereby reducing a rattling noise of the valve that constitutes an extractor grille.