Adaptive Windscreen Washer Control for Universal Wiper Systems
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Solution Overview
Problem
Existing windshield washing systems require specific adaptation for each vehicle model, making them expensive to develop and limiting their adaptability to different wiping systems, as they rely on vehicle-specific cam profiles and wiper positioning.
Innovation Solution
A method that estimates real-time variations in wiper arm speed based on vehicle conditions, such as speed, temperature, rain, and dirt levels, to precisely control the spraying of the windshield washer, allowing for adaptable and precise cleaning without requiring vehicle-specific adaptations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If vehicle-specific cam profiles and wiper positioning are used to control spraying, then spraying control over the desired area is guaranteed, but the system becomes expensive to develop and requires adaptation for each vehicle model
Solution Approach 1:
The control module is designed to be universal and adaptable to different vehicle models and wiper systems. It receives various input parameters (vehicle speed, temperature, rain detection, dirt detection, motor consumption) and adjusts the spraying control accordingly, eliminating the need for vehicle-specific cam profiles while maintaining precise spraying control over the desired glazed surface area.
2Adaptability or versatility
If real-time speed estimation based on multiple parameters is implemented, then adaptability to different conditions is improved, but the complexity of the control system increases
Solution Approach 1:
The control module monitors and responds to changes in multiple parameters including vehicle speed, temperature, rain detection, dirt detection, and motor consumption. By adjusting the spraying control based on these varying parameters, the system adapts to different vehicle conditions and maintains optimal cleaning performance without requiring complex mechanical adaptations.
Data Source
AI summary
The present invention relates to the control of a windshield washer system integrated into a windshield wiper system of a motor vehicle, the wiper system comprising a wiper motor (10) for the rotational drive of a brush holder arm, and the windshield washer system comprising at least one nozzle (20) disposed on said brush holder arm or on the wiper, capable of delivering, on a wiper cycle, at least one jet of liquid in front of the wiper relative to the sweeping direction during at least a first activation period of the windshield washer system defined between a triggering instant and a stopping instant of the liquid spraying. According to the invention, the speed variations of the brush-carrying arm on the glass surface are estimated in real time on each wiping cycle according to parameters relating to the conditions of use of the vehicle, and then the time of triggering and/or stopping the spraying is adapted accordingly.