Adaptive Braking Control for Work Vehicle Tip-Over Prevention
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Solution Overview
Problem
Work vehicles, such as wheel loaders, face instability and tip-over risks during braking, especially when the load arm is raised, due to powerful braking systems and inexperienced operators, which can lead to discomfort and safety issues.
Innovation Solution
A method for controlling braking force by detecting operating parameters like rear axle load, vehicle speed, and implement position, using a brake-by-wire system to determine and adjust the braking force, ensuring stability and reducing the risk of tip-over by modifying the brake signal response based on calculated stability values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a powerful braking system is used to meet minimum retardation speed requirements, then braking performance is improved, but vehicle stability deteriorates when the load arm is in a raised position
Solution Approach 1:
The braking system dynamically adjusts the braking force based on real-time detection of operating parameters (load arm position, vehicle speed, brake pedal position). The control unit modifies the braking signal to reduce braking force when instability is detected, transforming the static powerful braking system into a dynamic adaptive system that maintains stability while preserving braking capability when needed.
Solution Approach 2:
The system implements feedback control by continuously detecting operating parameters including load arm position, vehicle speed, and brake pedal position. The control unit processes this feedback information and automatically adjusts the braking force accordingly, reducing braking force when the load arm is in a raised position to prevent tip-over, while restoring full braking force when conditions are safe.
2Stability of the object's composition
If braking force is reduced to prevent tip-over, then vehicle stability is improved, but braking performance deteriorates
Solution Approach 1:
The system changes the braking force parameter dynamically based on detected operating conditions. When the load arm position indicates potential instability, the control unit modifies the braking signal to reduce braking force. When conditions are safe (load arm in safe position), the system restores full braking force, ensuring braking performance is maintained when vehicle stability is not compromised.
3Reliability
If automatic braking control is implemented to prevent tip-over, then safety is improved, but system complexity increases
Solution Approach 1:
The control unit serves multiple functions: it processes brake pedal position signals, detects operating parameters (load arm position, vehicle speed), determines vehicle stability, modifies braking signals to prevent tip-over, and maintains normal braking operation. By consolidating these diverse functions into a single control unit, the system achieves enhanced safety without proportionally increasing overall system complexity.
Data Source
AI summary
A method and a system are provided for controlling a braking force of a vehicle. The method includes the steps of detecting at least one operating parameter of the vehicle, detecting a position of an operator controlled braking element, determining a magnitude of a braking force on the basis of a detected magnitude of the operating parameter and the detected position of the operator controlled braking element and braking the vehicle according to the determined braking force.