Vehicle Wiper System with Varying Depth Spoiler Accommodation
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Solution Overview
Problem
Existing wiper systems for vehicles face issues with snow accumulation, leading to wiper blade damage and motor locking due to insufficient accommodation space depth variation along the wiper blade's length, causing uneven snow accumulation and potential jamming.
Innovation Solution
A wiper system design with a spoiler that includes an accommodation space with varying depth between the depth end wall and the wiper blade, where the distance is larger at the distal end side than at the pivot axis side, allowing for appropriate space for snow accumulation and reducing the risk of damage or locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the accommodation space has a constant depth along the wiper blade length, then the structure is simple and easy to manufacture, but the distal end side of the wiper blade does not have sufficient space for accumulating snow, causing wiper blade damage or motor locking
Solution Approach 1:
The accommodation space is designed with varying depth along the wiper blade length, creating different local characteristics. The distal end side has a larger distance to the depth end wall compared to the pivot axis side, providing sufficient snow accumulation space where needed while maintaining a relatively simple overall structure.
2Quantity of substance
If the accommodation space depth is increased to accommodate more snow, then snow accumulation capacity is improved, but the spoiler structure becomes more complex and larger
Solution Approach 1:
Instead of uniformly increasing the accommodation space depth throughout, the design applies increased depth selectively at the distal end side where snow accumulation is greatest. This local enhancement provides the necessary snow capacity while minimizing the overall volume increase of the spoiler.
3Shape
If the wiper blade is accommodated in a compact space, then the spoiler maintains a clean appearance, but there is insufficient space for snow accumulation at the distal end side
Solution Approach 1:
The accommodation space is designed with non-uniform depth distribution, maintaining a compact overall appearance while providing sufficient local space at the distal end side for snow accumulation. The varying depth creates an optimized balance between aesthetic appearance and functional reliability.
Data Source
AI summary
A rear spoiler includes a depth end wall, which bounds an accommodation space, which accommodates a wiper blade upon positioning of the wiper blade in a stop position. A distance between the depth end wall and the wiper blade in the stop position measured in a direction generally parallel to a surface of a window glass, which is wiped by the wiper blade, is set such that the distance between the depth end wall and a first longitudinal side of the wiper blade, which is opposite from the pivot axis, is larger than the distance between the depth end wall and a second longitudinal side of the wiper blade, which is opposite from the first longitudinal side of the wiper blade.