Sequential Braking Control for Tractor-Trailer Coupler Elongation
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Solution Overview
Problem
Existing techniques for controlling a combination vehicle with a towing vehicle and towed vehicles delay the initial movement by suppressing acceleration, leading to a long time to reach target acceleration while attempting to minimize shocks and vibrations.
Innovation Solution
The braking control device imparts braking force sequentially to towed vehicles starting from the rearmost vehicle when the towing vehicle begins to start, elongating couplers to the appropriate length before acceleration, allowing for prompt acceleration while suppressing shocks and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If acceleration increase is suppressed after starting to accelerate the combination vehicle, then shocks and vibrations of towed vehicles are suppressed, but initial movement is delayed and time to reach target acceleration increases
Solution Approach 1:
The braking force is applied to towed vehicles before the towing vehicle starts accelerating, in advance of the acceleration phase. This preliminary braking action pre-elongates the couplers to their operational length, so that when acceleration begins, the couplers are already in the appropriate state to transmit force smoothly without causing shocks or vibrations, while also being ready to immediately transmit acceleration force without delay.
Solution Approach 2:
A braking force (opposing force) is applied to the towed vehicles before acceleration begins. This counteracting force pre-tensions the couplers, creating the appropriate initial state that prevents harmful shocks and vibrations during subsequent acceleration, while the coordinated release of braking and application of牵引 force enables prompt acceleration.
2Speed
If braking force is applied to towed vehicles before towing vehicle starts, then couplers are elongated to appropriate length in short time, but additional control complexity is introduced
Solution Approach 1:
The braking control is applied segmentally to different towed vehicles in sequence from the rearmost vehicle forward. This segmentation allows the control system to manage the complexity by handling one vehicle at a time, applying braking force in a structured sequence that systematically elongates each coupler section without requiring complex simultaneous coordination of all vehicles.
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
This method enables the combination vehicle to start and accelerate promptly while minimizing shocks and vibrations in the towed vehicles by elongating couplers to the necessary length before starting, reducing the time to reach target acceleration.
Implementation Method 1
a braking force is imparted to wheels of the towed vehicles... by imparting the braking force to the wheels of the towed vehicles, the couplers are elongated
Data Source
AI summary
A method is provided for controlling a braking device which controls a braking force of towed vehicles in a combination vehicle which includes a towing vehicle and a plurality of towed vehicles towed by the towing vehicle, and in which the towing vehicle and the towed vehicle are coupled by a coupler and the towed vehicles are coupled by couplers. In the method for controlling the braking device, after the towed vehicle that is located on a rearmost side is made not to move, imparting a braking force to the plurality of towed vehicles towed by the towing vehicle starting in order from the towed vehicle located on a rear side.