Wiper Arm Stop Control for Safe Concealed Blade Storage
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Solution Overview
Problem
In fully concealed type wiper devices, replacing the wiper blade at the service position can lead to inadvertent storage operations without returning the wiper arm to the original position, causing interference with the engine hood and potential damage to the windshield due to the wiper arm falling and twisting.
Innovation Solution
A wiper control method that temporarily stops the wiper arm at a predetermined stop position above the lower reversal point for a set time before moving it to the storage position, allowing the arm to fall safely without contacting the engine hood, thus preventing windshield damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the wiper arm is stored in the locked back state at the storage position, then the wiper blade is concealed under the engine hood, but the wiper arm may interfere with the engine hood and fall down causing windshield damage
Solution Approach 1:
The control device performs preliminary detection to identify whether the wiper arm is in the locked back state before executing the storage operation. This preliminary identification allows the system to take different control actions based on the detected state, preventing the harmful effect of windshield damage while maintaining the benefit of blade concealment.
Solution Approach 2:
The control device receives feedback signals from detection means that monitor the wiper arm position and locked back state. Based on this feedback, the control device adjusts the storage operation - either executing it normally if the arm is not locked back, or preventing it if the arm is in the locked back state, thus avoiding windshield damage.
2Productivity
If the wiper arm is moved to the storage position after blade replacement, then the wiper blade is stored, but the operation may be inadvertently performed without returning the wiper arm to the original position
Solution Approach 1:
The detection means continuously monitors the wiper arm position and provides feedback to the control device. This feedback mechanism ensures that the control device can accurately determine whether the wiper arm has been properly returned to the original position or is in an incorrect state, preventing inadvertent storage operations.
Solution Approach 2:
The control device automatically detects the wiper arm state and makes control decisions without requiring manual intervention. The system self-regulates by comparing the detected state with the expected state and automatically preventing incorrect storage operations, improving both reliability and operational accuracy.
Data Source
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AI summary
A wiper arm is operated in a locked back state to prevent a wiper blade from falling down together with the wiper arm and coming into contact with a windshield to damage the glass. An arm falling position X for stopping wiper arms 5 and 6 for a predetermined time is set above a lower reversal position L. When the wiper arms 5 and 6 stopped on the side of an upper reversal position U with respect to the arm falling position X, such as a service position SP, are moved to a storage position ST set below the lower reversal position L, or when a wiping operation is to be performed again, the wiper arms 5 and 6 are temporarily stopped for the predetermined time at the arm falling position X. Then, after the predetermined time elapses, the wiper arms 5 and 6 are moved to the storage position ST in the case of a storage operation, and moved to the upper reversal position U in the case of restarting, and then the normal wiping operation is performed.