Construction Machine Direction Reversal Control for Safer Ground Processing
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Solution Overview
Problem
Self-propelled construction machines face challenges in safely and easily reversing direction during operations, as the driver must manually control speed and other components, placing high demands on the operator.
Innovation Solution
The implementation of an automatic direction reversal control system that interacts with the drive device to smoothly change direction, allowing the machine to come to a stop and accelerate in the opposite direction, while also adjusting other components like the milling/mixing roller and roller flaps, reducing the operator's workload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual control is used for direction reversal, then the driver can control all components, but the operator workload and complexity increase significantly
Solution Approach 1:
The control device automatically manages the direction reversal process by independently controlling the drive device to reduce speed to zero and then accelerate in the opposite direction, eliminating the need for manual intervention and reducing operator workload
Solution Approach 2:
The control device is configured to automatically execute the speed reduction to zero and subsequent acceleration in the opposite direction upon receiving a direction reversal control signal, preparing and executing the reversal sequence without driver intervention
2Ease of operation
If automatic direction reversal is implemented, then operator workload is reduced, but the control system complexity increases
Solution Approach 1:
The control device integrates multiple functions including speed control, direction reversal automation, and coordination of drive device operations, allowing a single device to handle complex reversal sequences that would otherwise require multiple separate control systems
Solution Approach 2:
The control device merges the functions of speed reduction, stopping, and acceleration in the opposite direction into a single automated control unit that receives one direction reversal control signal and executes the entire sequence
3Reliability
If the machine must stop completely before reversing, then direction change is safe, but productivity decreases due to time loss
Solution Approach 1:
The control device automatically executes the speed reduction to zero and subsequent acceleration in the opposite direction upon receiving a direction reversal control signal, preparing and executing the reversal sequence without driver intervention, ensuring safety while minimizing downtime
Solution Approach 2:
The automated control system ensures continuous operation by seamlessly transitioning from forward motion to reverse motion without manual intervention delays, maintaining operational flow while ensuring safe direction reversal
Data Source
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AI summary
The invention relates to a self-propelled construction machine for soil processing, in particular a stabilizer or recycler. The construction machine according to the invention has a control unit 22 for automatic reversal of direction, which interacts with the drive unit 21 for the wheels 2, 3 or tracked undercarriages. The control unit 22 is configured such that, upon receiving a reversal of direction control signal, the drive unit 21 reduces the predetermined first speed at which the construction machine travels in the first direction until the construction machine comes to a standstill, and after the construction machine has come to a standstill, drives the wheels or tracked undercarriages in the opposite direction, with the drive unit increasing the speed in the second direction up to a predetermined second speed.A special aspect of the invention is that automatic control of not only the drive unit, but also other components of the construction machine takes place depending on different driving situations.