Work Machine Brake Control for Hydraulic Overheating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Work machines experience overheating of hydraulic fluid in their brakes due to frequent and prolonged use, leading to high temperatures and potential system failure.
Innovation Solution
A work machine control system that includes an engine, transmission, travel device, hydraulic brake, and controller. The controller acquires travel commands, vehicle speed, and hydraulic temperature, determining a target driving power and assist braking power to manage engine brake and hydraulic brake interactions, thereby regulating hydraulic fluid temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulic brakes are used for frequent and prolonged operation, then braking power is maintained, but hydraulic fluid temperature increases causing overheating
Solution Approach 1:
The engine brake acts as an intermediary braking mechanism that shares the braking load with the hydraulic brakes. By using engine brake assistance, the hydraulic brakes are subjected to reduced stress and generate less heat, thereby preventing overheating while maintaining overall braking performance
Solution Approach 2:
The control device dynamically adjusts the target driving power based on detected hydraulic temperature. When temperature exceeds a predetermined threshold, the system modifies operating parameters to activate engine brake assistance, thereby changing the braking power distribution parameter to reduce hydraulic brake load and prevent overheating
2Temperature
If engine brake assistance is activated to reduce hydraulic brake load, then hydraulic fluid temperature is reduced, but control complexity increases
Solution Approach 1:
The control device continuously detects hydraulic temperature and uses this feedback to dynamically adjust the target driving power. This closed-loop control activates engine brake assistance only when necessary (when temperature exceeds threshold), achieving temperature control while maintaining relatively simple control logic
Solution Approach 2:
The system uses the engine's existing braking capability (engine brake) to assist the hydraulic brakes. By leveraging the engine's natural compression braking effect, the system achieves additional braking power without requiring external or complex additional braking mechanisms
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 suppresses overheating of hydraulic fluid in the brakes by determining assist braking power based on hydraulic temperature, utilizing engine brake assistance to manage heat buildup, thus ensuring the reliability and performance of the work machine.
Implementation Method 1
The hydraulic brake brakes the travel device by being driven by hydraulic fluid
Implementation Method 2
the hydraulic fluid easily reaches high temperatures
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A work machine includes an engine, a transmission, a travel device, a vehicle speed sensor, a hydraulic brake, a hydraulic temperature sensor, and a controller. The controller acquires a travel command for controlling the travel of the work machine. The controller acquires the vehicle speed. The controller determines a target driving power based on the travel command and the vehicle speed. The target driving power includes a positive driving power for causing the work machine to travel and a negative driving power for braking the work machine. The controller controls the engine and the transmission to achieve the target driving power. The controller acquires the hydraulic temperature. The controller determines, based on the hydraulic temperature, an assist braking power for assisting the braking power of the hydraulic brake. The controller determines the target driving power to achieve the assist braking power.