Wiper Arm Storage Control to Prevent Hood and Windshield Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
After replacing the wiper blade at the service position, there is a risk of inadvertently performing the storage operation without returning the wiper arm to its original position, leading to potential interference with the engine hood and subsequent damage to the windshield.
Innovation Solution
A wiper control method that involves setting a stop position above the lower reversal position and temporarily stopping the wiper arm at this position for a predetermined time before moving it to the storage position, ensuring safe return and storage of the wiper arm and blade.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the wiper arm is moved directly to the storage position after blade replacement, then the storage operation is completed efficiently, but the wiper arm may interfere with the engine hood and cause the wiper blade to fall and damage the windshield
Solution Approach 1:
The control device performs preliminary detection of the wiper arm's locked-back state before executing the storage operation. By detecting the state detection signal from the state detection sensor that indicates the wiper arm is in the locked-back state, the control device prepares to intervene before the harmful event occurs, preventing the wiper blade from falling and damaging the windshield while maintaining efficient storage operation
Solution Approach 2:
The control device uses feedback from the state detection sensor to monitor the wiper arm's locked-back state during the storage operation. When the detection signal indicates the locked-back state, the control device automatically adjusts the storage operation by controlling the wiper motor to move the wiper arm to the intermediate position first, then to the storage position, thereby preventing windshield damage while completing the storage function
2Object-affected harmful factors
If the wiper arm is temporarily stopped at the intermediate position during storage operation, then the windshield damage risk is prevented, but the storage operation time is increased
Solution Approach 1:
The control device moves the wiper arm to the intermediate position as a preliminary safety measure before completing the storage operation. This intermediate positioning action is performed only when the locked-back state is detected, allowing the wiper blade to be safely positioned away from the windshield area before final storage, thus preventing damage while minimizing time loss through conditional execution
Solution Approach 2:
The storage operation is segmented into two distinct phases: first moving the wiper arm to the intermediate position to prevent windshield contact, then moving to the final storage position. This segmentation allows the harmful effect to be prevented during the critical transition phase while maintaining overall operational efficiency by only applying the intermediate stop when necessary
Data Source
AI summary
A wiper control device for controlling an operation of a wiper device is provided. The wiper control device includes an arm operation determination portion sets a stop position for stopping a wiper arm for a predetermined time above a lower reversal position, and when moving the wiper arm stopped on an upper reversal position side with respect to the stop position to a storage position set below the lower reversal position, temporarily stops the wiper arm at the stop position for a predetermined time, and moves the wiper arm to the storage position after the predetermined time elapses. The stop position is an arm falling position at which the wiper arm in a locked back state falls without contacting an engine hood of a vehicle, and a wiper blade contacts a windshield.