Brake Chamber Response Time Detection via Pressure Gradient
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for determining the response time parameter of a brake chamber in a vehicle brake system are inefficient, as they often rely on external sensors and simulations, leading to variability in brake pressure control and unpredictable ABS behavior across different vehicles and brake systems.
Innovation Solution
A method that determines the response time parameter by observing pressure gradients in the pressure signal of an electronic pressure modulator, utilizing the defined relationship between the pressure signal gradient and actual brake chamber pressure, allowing for self-configuration and continuous online learning, thereby adapting pressure control and improving ABS performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external sensors are used to measure brake chamber pressure, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The electronic pressure modulator uses its own internal pressure sensor to measure both the modulator pressure and, through the established relationship, the brake chamber pressure. This self-service approach eliminates the need for external brake chamber sensors while maintaining measurement capability.
Solution Approach 2:
The patent introduces an intermediary mathematical model that relates the pressure signal from the electronic pressure modulator to the actual brake chamber pressure. This model acts as a mediator, allowing indirect measurement of brake chamber pressure through the modulator's pressure signal without direct physical contact.
2Device complexity
If parametric simulations are used to estimate response time, then device complexity is reduced, but measurement precision deteriorates
Solution Approach 1:
The system continuously monitors the pressure signal from the electronic pressure modulator and uses the established relationship to continuously determine the brake chamber pressure and response time parameters. This feedback mechanism allows real-time adaptation to actual operating conditions, improving precision over static simulations.
Solution Approach 2:
The patent establishes the relationship between modulator pressure signal and brake chamber pressure in advance through characterization, allowing the system to be prepared with the necessary calibration data before actual operation, enabling accurate real-time determination without complex simulations during runtime.
3Device complexity
If a fixed response time value is used during development, then device complexity is reduced, but adaptability deteriorates
Solution Approach 1:
The system transitions from using a fixed, static response time value to dynamically determining the response time parameter in real-time based on the actual pressure signal characteristics. This dynamic approach allows the brake control system to adapt to different brake chamber sizes, configurations, and operating conditions automatically.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A method for determining a response time parameter of a brake chamber (120) of a brake system (110) for a vehicle (100) is presented. The brake system (110) comprises an electronic pressure modulator (130) configured to modulate pressure in the brake chamber (120) and a solenoid valve (140) for the brake chamber (120). The method comprises a step of detecting an end of a fallback slope of a pressure signal (135) as measured at the electronic pressure modulator (130) after a pulse of the solenoid valve (140). Furthermore, the method comprises a step of setting the response time parameter of the brake chamber (120) depending on the detected end of the fallback slope.