Brake Signal Generator Modulation Encoding
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Solution Overview
Problem
Existing brake systems for vehicles, particularly pneumatic systems in trucks and buses, struggle to detect small deflections of the brake signal generator, leading to delays in processing braking demands and failing to transmit both braking demand and brake pressure effectively, resulting in incomplete information transmission.
Innovation Solution
A method that transmits both the braking demand and brake pressure value to the brake control device via a single brake signal, using modulation techniques such as duty cycle or frequency modulation on a carrier frequency, allowing for immediate activation of brake lights and preparatory measures during the braking process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If only brake pressure value is transmitted to the brake control device, then the brake pressure control is simple, but the braking demand information is lost causing delays in processing
Solution Approach 1:
The patent combines braking demand information and brake pressure value into a single brake signal transmission. The brake signal generator transmits both pieces of information simultaneously through one signal channel to the brake control device, eliminating the need for separate transmissions and ensuring neither information is lost or delayed.
Solution Approach 2:
The brake signal is designed to serve multiple functions: it conveys both the braking demand status and the brake pressure value. This multi-functional signal allows the brake control device to receive complete information for immediate processing and appropriate brake pressure control without requiring additional signal channels.
2Measurement precision
If brake signal transmission uses duty cycle or PWM modulation, then the brake pressure control precision is improved, but the system complexity increases
Solution Approach 1:
The patent replaces direct mechanical or simple electrical signal transmission with modulation techniques (duty cycle modulation or PWM modulation). This substitution allows precise encoding of brake pressure values and braking demand information in the signal characteristics, enabling the brake control device to accurately determine both parameters without additional sensors or complex mechanical linkages.
3Speed
If small deflections of the brake signal generator are not detected, then the system operation is simple, but the responsiveness to braking demand is delayed
Solution Approach 1:
The brake signal generator transmits braking demand information as soon as any deflection occurs, before the full brake pressure is established. This preliminary transmission of braking demand status allows the brake control device to prepare for brake pressure control immediately, reducing the overall response time while maintaining simple detection mechanics.
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
Ensures accurate and immediate transmission of braking information, enabling timely activation of brake lights and other safety measures by encoding the braking demand within the brake signal, thus improving the responsiveness and reliability of the braking system.
Implementation Method 1
The transmission of the brake signal is typically carried out as a duty cycle or a pulse width modulated signal (PWM) on a carrier frequency
Implementation Method 2
transmitting an actuation of the brake signal generator as a brake signal to the brake control device in addition to a brake pressure value
Data Source
AI summary
A method for operating a brake of a motor vehicle with at least one electronic brake signal generator and with at least one brake control device for actuating the brake based on a brake signal of the brake signal generator includes transmitting the brake signal to the brake control device. The method additionally includes transmitting an actuation of the brake signal generator as a brake signal to the brake control device in addition to a brake pressure value.