Trailer Brake Modulator Sequencing to Prevent Voltage Drop
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Solution Overview
Problem
Existing multi-part vehicle braking systems face issues with high peak current values due to simultaneous actuation of brake modulators, leading to voltage drops and potential malfunctions, especially in rear trailers.
Innovation Solution
Implementing a method for asynchronous actuation of brake modulators in multi-part vehicles by determining time-offset actuating signals based on trailer position and address, ensuring asynchronous operation to reduce peak current values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If simultaneous actuation of brake modulators is used, then fast brake response is achieved, but high peak current values occur causing voltage drops and potential malfunctions
Solution Approach 1:
The patent applies periodic action by sequentially actuating brake modulators in different trailers at different times rather than simultaneously. The controller sends actuation signals with time offsets to each brake modulator based on their position in the vehicle train, creating a staggered braking sequence that reduces peak current demands while maintaining effective braking performance
Solution Approach 2:
The patent segments the braking action across multiple trailers by dividing the simultaneous braking event into sequential phases. Each trailer's brake modulator is actuated in a predetermined sequence based on its position, effectively segmenting the total current draw over time and preventing overwhelming peak currents that would cause voltage drops
2Productivity
If simultaneous actuation of all brake modulators is implemented, then braking efficiency is improved, but voltage drops occur affecting rear trailers
Solution Approach 1:
The controller preliminarily determines the actuation sequence and time offsets for each brake modulator before the braking event occurs. Based on the detected braking request and known trailer positions, the controller pre-calculates the sequential actuation schedule, ensuring that current draw is distributed over time and voltage levels remain stable throughout the braking process
Solution Approach 2:
The patent changes the temporal parameter of brake modulator actuation from simultaneous to sequential. By introducing time offset parameters between actuation events and adjusting the sequence based on trailer position, the system transforms the electrical load profile while maintaining the mechanical braking effectiveness, preventing voltage drops that would affect rear trailers
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 approach reduces peak current values while maintaining fast brake response, preventing voltage drops and ensuring reliable braking across all trailers.
Implementation Method 1
The brake modulator includes one or more solenoid valves, which can be controlled by using the braking signal in order to effect the braking
Data Source
AI summary
In a method for braking a multi-part vehicle including a commercial vehicle having a tractor and two trailers each having an electrically actuatable brake modulator, a braking request to brake the vehicle, in particular the commercial vehicle, is detected. By using the braking request, actuating signals for the time-offset actuation of the brake modulators are determined. The actuating signals for the asynchronous actuation of the brake modulators are output.