Dual-Motor Wiper Control for Driver-Side Failure Coverage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wiper devices with narrower operation ranges for passenger seat blades closer to the upper inversion position side than driver seat blades face challenges in securing the driver's field of vision, especially in cases of motor failure on the driver seat side.
Innovation Solution
A wiper device with a control unit that includes a pair of wiper blades that includes a first wiper motor unit on the driver seat side and a second wiper motor unit on the passenger seat side, which transmit and receive drive information, allowing the passenger seat side blades to adjust their operation range based on driver seat side failures, ensuring synchronized operation and preventing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If the operation range of the wiper blade on passenger seat side is set narrower and closer to the upper inversion position side than the operation range of the wiper blade on driver seat side, then interference between wiper blades is suppressed and appearance of wiper operation is improved, but the driver's field of vision cannot be secured in case of driver seat side motor failure
Solution Approach 1:
The wiper blade on the passenger seat side dynamically adjusts its operation range based on the operational status of the driver seat side wiper motor. When the driver seat motor is detected to have failed, the control unit expands the operation range of the passenger seat wiper blade to cover the driver's field of vision area, transforming a static configuration into a dynamic adaptive system that responds to failure conditions
Solution Approach 2:
The control unit changes the operational parameters (operation range boundaries) of the passenger seat wiper blade based on the detected failure state. By modifying the lower inversion position and operation range limits in response to driver seat motor failure, the system adapts the wiping coverage to prioritize driver visibility while maintaining normal tandem operation under standard conditions
2Ease of operation
If the operation range of the wiper blade on passenger seat side is set narrower and closer to the upper inversion position side, then the wiper blade operation is compact and less intrusive, but it becomes difficult to secure the driver's field of vision when the driver seat wiper motor fails
Solution Approach 1:
The system transitions from a fixed compact operation range to a dynamic adjustable range that expands when needed. The passenger seat wiper blade maintains its compact narrow operation during normal tandem operation for ease of use and aesthetic appearance, but automatically expands its operation range when driver seat motor failure is detected, ensuring driver visibility is secured
Solution Approach 2:
The control unit is pre-configured with failure detection capabilities and predetermined response actions. Upon detecting driver seat motor failure, the system immediately adjusts the passenger seat wiper blade's operation range without requiring manual intervention, preparing the system in advance to handle failure scenarios while maintaining normal compact operation
Data Source
AI summary
A wiper device includes a wiper blade on driver seat side, a wiper blade on passenger seat side, a drive unit on driver seat side that causes wiper blade on driver seat side to perform tandem operation, and a drive unit on passenger seat side that causes wiper blade on passenger seat side to perform tandem operation. The drive units on driver and passenger seat sides transmit and receive drive information. An operation range of wiper blade on passenger seat side is set narrower and closer to an upper inversion position side than an operation range of wiper blade on driver seat side. The drive unit on passenger seat side changes operation range of wiper blade on passenger seat side toward a lower inversion position side of wiper blade on driver seat side in response to detecting, based on drive information, a failure of drive unit on driver seat side.