Trailer Brake Valve Control for Manual and Autonomous Modes
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Solution Overview
Problem
Existing work vehicles face challenges in effectively controlling trailer brake assemblies, particularly in autonomous or semi-autonomous operations, where direct operator input is limited or absent.
Innovation Solution
A brake control system is introduced that includes a trailer brake valve interposed between a vehicle brake assembly and a trailer brake assembly, with a brake module providing a first signal in manual mode and a control valve providing a second signal in autonomous mode, segregating fluid circuits for independent control of control line and supplementary line brakes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single fluid circuit is used to control both control line brakes and supplementary line brakes, then the device complexity is reduced, but the reliability of braking control deteriorates due to inability to independently control different brake functions
Solution Approach 1:
The patent divides the fluid circuit into two separate circuits: a control line circuit and a supplementary line circuit. This segmentation allows independent control of different brake functions, improving reliability while managing complexity through functional separation. The control line circuit responds to driver input, while the supplementary line circuit provides additional braking force, and both can operate independently or in coordination.
2Extent of automation
If manual brake control is used in autonomous mode, then the ease of operation is maintained, but the extent of automation deteriorates due to lack of autonomous braking control capability
Solution Approach 1:
The patent introduces a control valve as an intermediary device between the driver's brake input and the trailer brake assembly. This control valve can be manually operated by the driver or automatically controlled by the autonomous vehicle system, serving as a mediator that enables both manual and autonomous operation modes. The control valve receives control signals and translates them into appropriate braking force application, facilitating seamless transition between operation modes.
3Manufacturing precision
If proportional pilot pressure is not used in the trailer brake valve, then the device complexity is reduced, but the manufacturing precision of braking force control deteriorates
Solution Approach 1:
The patent employs hydraulic principles by using proportional pilot pressure control in the trailer brake valve. The valve responds proportionally to pilot pressure signals, translating varying pressure levels into corresponding braking force outputs. This hydraulic proportionality mechanism enables precise control of braking force without requiring complex electronic or mechanical control systems, achieving manufacturing precision through fluid pressure relationships.
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 ensures reliable and efficient braking control for trailers, enhancing safety and stability during manual and autonomous operations by segregating fluid circuits and utilizing proportional pilot pressures.
Implementation Method 1
A control valve is configured to provide a second signal to the trailer brake valve... energizing a control valve thereby allowing a proportional pilot pressure to be provided to the trailer brake valve as a second signal
Data Source
AI summary
A brake control system includes a trailer brake valve fluidly interposed between a vehicle brake assembly and a trailer brake assembly. A brake module is operably coupled with the vehicle brake assembly and configured to provide a first signal to the trailer brake valve. A control valve is configured to provide a second signal to the trailer brake valve. The trailer brake valve is operated based on the first signal when the vehicle is operated in a first mode and operated based on the second signal when the vehicle is operated in a second mode.