Dual-Motor Wiper System for Unobstructed Driver View
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Solution Overview
Problem
Conventional windshield wiper systems unnecessarily activate both wiper blades for cleaning, which can obstruct the driver's view, especially when the dirty portion is located on the passenger side and requires specific cleaning, leading to unnecessary activation of the driver's side wiper.
Innovation Solution
A system with two independent wiper blades and motors, where the control means activate only the wiper blade covering the sensor's portion, keeping the other blade stationary to avoid obstructing the driver's view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If both wiper blades are activated to clean the window, then the cleaning coverage is complete, but the driver's view is obstructed when the dirty portion is on the passenger side
Solution Approach 1:
The patent divides the window cleaning function into two independent zones, each controlled by a separate motor (first motor for driver's side, second motor for passenger side). This segmentation allows selective activation of only the necessary wiper blade based on sensor detection, preventing unnecessary obstruction of the driver's view while maintaining complete cleaning coverage when needed
Solution Approach 2:
The control means activate only the specific wiper blade corresponding to the detected dirty portion, rather than activating both blades unnecessarily. When the sensor detects dirt on the passenger side, only the second wiper blade is activated, providing partial action that is sufficient for the actual cleaning need without the harmful effect of both blades moving
2Reliability
If the driver's side wiper is activated to clean the passenger side portion, then the sensor area is cleaned, but the wiper crosses the driver's field of vision and disturbs the driver
Solution Approach 1:
The patent segments the wiper control system into two independent motor-controlled units, allowing the passenger side wiper (second wiper blade with second motor) to clean the sensor area without the driver's side wiper crossing the driver's field of vision. This eliminates the disturbance to the driver while maintaining sensor area cleanliness
Solution Approach 2:
Instead of using the driver's side wiper to clean the passenger side portion (which causes obstruction), the system inverts the approach by using the passenger side wiper specifically for cleaning the sensor area, thereby eliminating the harmful obstruction effect while achieving the same cleaning objective
3Device complexity
If a single motor controls both wiper blades, then the device complexity is reduced, but selective activation of individual blades is not possible
Solution Approach 1:
The patent applies segmentation by providing two independent motors (first motor and second motor) instead of a single motor, enabling each wiper blade to be controlled independently. This increased component count is justified by the gained adaptability to selectively activate only the necessary blade based on sensor feedback
Solution Approach 2:
The control means dynamically select which motor to activate based on sensor detection of the dirty portion location. The system adapts its operation in real-time, activating only the relevant wiper blade, which provides the versatility needed to avoid driver obstruction while maintaining complete cleaning capability
Data Source
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AI summary
Vehicle window wiping system, said window being equipped with a sensor, comprising a first wiping brush (15) capable of wiping a first area of the window, a portion (8, 8') of which extends at the level of said sensor, a second wiping brush (13) capable of wiping a second area of the window different from said first area, means for actuating said first and second wiping brushes for their movement on the window, and electronic means for controlling said actuating means, characterized in that said actuating means comprise a first actuating motor for said first brush and a second actuating motor for said second brush, and in that said controlling means are configured to activate only said first motor when cleaning of said portion is desired.