Work Vehicle Turning Control for Speed and Steering Balance
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Solution Overview
Problem
Existing work vehicles face inefficiencies due to uniformly limited maximum speed, which can result in unnecessarily low speeds, impacting work efficiency and stability, especially during turning, and lack the ability to independently manage speed and steering angle for different operators.
Innovation Solution
A work vehicle equipped with a speed detector, steering tool, notification apparatus, and controller that determines and adjusts vehicle speed and steering angle based on their relationship, using angular velocity and roll characteristics to optimize turning performance, allowing for dynamic control of speed and steering angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the maximum speed of the work vehicle is uniformly limited, then the vehicle stability during turning is improved, but the work efficiency deteriorates due to unnecessarily low speeds on flat straight roads
Solution Approach 1:
The patent applies dynamics by transitioning from a static uniform speed limit to a dynamic speed and steering angle control system. The control module dynamically adjusts the vehicle speed and steering angle based on real-time detection of the relationship between these parameters, allowing the vehicle to operate at optimal speeds for current conditions while maintaining stability during turning maneuvers.
2Adaptability or versatility
If the speed limit information is embedded in the speed key for each operator, then the speed can be individually limited for each operator, but the management complexity increases due to lending, borrowing, and copying prevention requirements
Solution Approach 1:
The patent extracts the speed limit configuration function from the physical speed key to the control module. Instead of embedding speed limits in the speed key itself, the system reads the speed key to identify the operator and then applies the appropriate speed and steering angle limits through the control module, eliminating the need for complex management of embedded speed limit information.
Solution Approach 2:
The patent uses copying by creating a digital representation of the speed key information (operator identification) that is read by the RFID reader. This copied information is then used by the control module to apply the appropriate speed and steering angle limits, replacing the need for physical speed keys with embedded speed limit data.
3Stability of the object's composition
If the vehicle speed is limited to ensure stability, then the turning stability is improved, but the vehicle is forced to travel at unnecessarily low speeds affecting work efficiency
Solution Approach 1:
The patent applies parameter changes by introducing steering angle as an additional controlled parameter alongside vehicle speed. The control module adjusts both speed and steering angle parameters based on the detected relationship between them, allowing the vehicle to maintain stability during turning while operating at higher speeds on straight roads, thus resolving the contradiction between speed and stability.
Data Source
AI summary
A work vehicle includes: a body; a traveling apparatus capable of a turning travel; a speed detector capable of detecting a vehicle speed; a steering tool manually operable to steer the traveling apparatus; a notification apparatus; and a controller. The controller is configured or programmed to control the traveling apparatus in response to a manual operation, with use of a travel control module; determine, based on a relationship between the vehicle speed and a steering angle of the steering tool, whether at least one of the vehicle speed and the steering angle needs to be reduced, with use of a determination module; and control the notification apparatus to give a notification of the determination by the determination module, with use of a notification module.