Vehicle Windshield Washer Purge Method
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Solution Overview
Problem
Existing windshield washing systems for vehicles waste liquid by ejecting the more expensive secondary cleaning fluid before the primary fluid, and the wiper blades can misalign the primary fluid's application, leading to inefficient cleaning.
Innovation Solution
A method that purges the piping system with the secondary fluid before switching to the primary fluid, ensuring the secondary fluid is used efficiently by activating the pump to circulate the secondary fluid until it reaches the orifices, and then deactivating it, while the wiper blades are positioned to optimize the distribution of the primary fluid on the windshield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the pump is activated to switch from first liquid to second liquid, then the second liquid is circulated, but the first liquid remains in the pipe system and is ejected before the second liquid, causing liquid waste
Solution Approach 1:
The system performs a preliminary purging action by activating the pump to circulate the second liquid through the pipe system before the wiper blades reach the position where liquid is ejected. This preliminary circulation displaces the first liquid from the pipes, ensuring that only the second liquid is ejected onto the windshield, thereby preventing liquid waste while maintaining cleaning efficiency
2Ease of operation
If the wiper blades are set in motion immediately when the pump is activated, then the cleaning process continues, but the first liquid arrives on the windshield offset from the wiper blade operation
Solution Approach 1:
The system activates the pump in advance to circulate the second liquid through the pipe system before the wiper blades reach the ejection position. This preliminary action ensures that the liquid is ready and properly positioned in the pipes, achieving perfect synchronization between liquid ejection and wiper blade operation, thereby improving cleaning quality
Solution Approach 2:
The system monitors the position of the wiper blades and the state of the pipe system to determine when to activate and deactivate the pump. This feedback mechanism ensures that the pump operates at the optimal moment to deliver the second liquid precisely when and where it is needed, maintaining perfect synchronization and cleaning effectiveness
3Reliability
If the pump system circulates liquid continuously, then the windshield is constantly cleaned, but the expensive second liquid is wasted by being ejected before the primary fluid
Solution Approach 1:
The pump is activated in advance to circulate the second liquid through the pipe system before the wiper blades reach the ejection position. This preliminary circulation ensures that the expensive second liquid is properly positioned in the pipes and displaces the first liquid, so that only the second liquid is ejected onto the windshield. This prevents waste of the expensive liquid while maintaining consistent cleaning quality
Solution Approach 2:
The pump operates periodically rather than continuously, being activated only when needed to purge the pipe system and deliver the second liquid. The pump is deactivated when the second liquid arrives at the orifice level, creating a periodic operation pattern that prevents waste of the expensive second liquid while ensuring consistent cleaning when required
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
This method prevents the wastage of the secondary fluid and ensures it is used only when needed, improving the efficiency of the cleaning process by ensuring the primary fluid is ejected at the correct time and location on the windshield.
Implementation Method 1
activating the pump system so as to circulate second fluid in the piping system so as to purge the piping system of the first fluid
Implementation Method 2
the pump system intended to circulate the first fluid and/or the second fluid in the pipe system until ejection through said orifices
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
The invention relates to a method for washing a motor vehicle wind shield (10) using a washing device (1) comprising reservoirs (2, 3) of first and second fluids, a channel (5) connecting the reservoirs (2, 3) to orifices (15) for ejecting the fluids onto the wind shield, at least one pump (20) intended to circulate the fluids in the channel (5), and at least one wiper blade (30), characterized in that, when the channel contains the first fluid, the method comprises the following steps: a) activating the pump system (20) so as to cause the second fluid to circulate in the channel system (5) so as to purge the channel of the first fluid, and b) deactivating the pump system (20) when the second fluid reaches the orifices (15).