Overload Protection Controller for Articulated Dump Trucks
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Solution Overview
Problem
Articulated dump trucks often experience reduced operational life due to operators exceeding the rated payload capacity, leading to overloading, which compromises the longevity of vehicle components.
Innovation Solution
An overload protection system that includes a controller receiving load data and pressure sensors to determine overload conditions, reducing the speed of hydraulic cylinders and engine power to discourage overloading by increasing cycle time and reducing productivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If operators exceed the rated payload capacity to reduce time spent on work site, then productivity increases, but the operational life of vehicle components is compromised
Solution Approach 1:
The system continuously monitors load data from sensors and provides feedback to the operator through the display interface. When the load exceeds the rated capacity, the system generates an overload indication, creating a closed-loop feedback mechanism that informs operators of the harmful condition in real-time, allowing them to adjust their behavior before component damage occurs.
Solution Approach 2:
The controller acts as an intermediary between the load sensing system and the operator. It processes the raw load data, compares it against the rated capacity, and generates appropriate visual indications through the display. This intermediary function translates complex sensor data into actionable information that operators can understand and respond to.
2Reliability
If the system reduces hydraulic cylinder speed and engine power in overload conditions, then component protection is improved, but productivity decreases
Solution Approach 1:
The system applies preliminary anti-action by providing advance warning to operators before overload damage can occur. The visual indication system alerts operators to approaching or exceeded load limits, allowing them to take corrective action (reduce load, redistribute weight, or slow down) before the harmful overload condition actually damages components. This preventive approach protects components while maintaining normal operational productivity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively protects the work vehicle from overloading by reducing hydraulic cylinder speed and engine power, thereby extending the operational life of components and discouraging operators from exceeding payload limits.
Implementation Method 1
a pressure sensor that provides a pressure associated with the hydraulic circuit
Data Source
AI summary
An overload protection control system and method are disclosed for an articulated dump truck having a load bin movable between loaded and unloaded positions by hydraulic cylinders of a hydraulic circuit. The overload protection control system includes a source of load data associated with the load bin. The overload protection system also includes at least one controller that receives and processes the load data to determine an overload condition associated with the load bin and determines a speed associated with the work vehicle. The speed is reduced in the overload condition.