Work Vehicle Brake Cooling Oil Overheating Warning
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Solution Overview
Problem
Existing wheel loader systems do not effectively notify operators when the brake cooling oil is likely to overheat, leading to potential overheating issues during frequent brake operations, especially during long loading operations.
Innovation Solution
A work vehicle equipped with a controller that monitors and analyzes parameters such as vehicle speed, brake pressure, and engine rotation speed to detect conditions that may lead to overheating, and provides a warning to the operator through a display and alarm system before the brake cooling oil temperature exceeds safe limits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the highest rotation speed of the engine is restricted when cooling oil temperature reaches a predetermined value, then the temperature increase of cooling oil is restricted, but the operator cannot recognize the likelihood of overheating before it occurs
Solution Approach 1:
The system performs preliminary detection and warning before overheating occurs. The controller calculates a determination value based on multiple parameters (brake operation times, engine rotation speed, vehicle speed) and compares it against a threshold to issue a warning in advance, allowing the operator to take preventive action before the cooling oil temperature reaches critical levels.
Solution Approach 2:
Instead of waiting for the temperature threshold to be reached before taking action, the system uses a determination value calculation that incorporates multiple factors to trigger a warning earlier in the process. This partial action approach provides advance notice rather than waiting for the complete temperature buildup to occur.
2Productivity
If brake operations are performed frequently for loading operations, then productivity is improved, but the temperature of cooling oil gradually increases leading to overheating
Solution Approach 1:
The system establishes a feedback loop that continuously monitors brake operation frequency, engine rotation speed, and vehicle speed. The controller calculates a determination value based on this feedback and compares it against a threshold, providing continuous information about the thermal state of the braking system and enabling the operator to adjust operations to prevent overheating.
Solution Approach 2:
The system serves itself by automatically monitoring its own operational parameters and providing warnings about potential overheating conditions. The controller uses data from existing sensors to calculate the determination value and issue warnings without requiring external monitoring equipment or manual intervention.
Data Source
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AI summary
A work vehicle is provided. The work vehicle is capable of notifying an operator of a state close to overheating of a temperature of a cooling oil that cools a brake device before the temperature overheats. A controller (10) in a work vehicle (100) compares each detection value detected from a brake pressure sensor (26) and a vehicle speed sensor (15) to each threshold (V1, P1, R1) predetermined corresponding to each sensor. The controller (10) outputs a warning command that a temperature of a cooling oil is likely to overheat to a notification device (28) when a state that at least one detection value is equal to or more than the threshold and when a state that at least one detection value is equal to or more than the threshold continues for a first duration (t1) or more.