Brake Pressure Control Module With Vibration-Isolated Inertial Sensor
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Solution Overview
Problem
Electro-pneumatic service brake installations face issues with measurement errors due to oscillations and vibrations from solenoid valves affecting inertia sensors, and have a high probability of defects due to numerous electric and pneumatic connections.
Innovation Solution
An integrated 1-channel electro-pneumatic pressure control module with an oscillation-decoupling arrangement and resilient mounting for the inertial sensor, along with a central electronic brake control apparatus that reduces the need for external components and simplifies the construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If solenoid valves are used for pressure control, then brake pressure can be precisely controlled, but oscillations and vibrations are generated that cause measurement errors in inertia sensors
Solution Approach 1:
The inertia sensor is physically separated from the solenoid valve assembly and mounted on a separate oscillation-decoupling arrangement. This extraction removes the sensor from the source of vibrations, allowing the solenoid valve to operate precisely while the sensor remains isolated from harmful oscillations and measurements accurately.
2Reliability
If multiple individual components are used for pressure control channels, then functional flexibility is improved, but the number of electric and pneumatic connections increases leading to higher defect probability
Solution Approach 1:
Multiple pressure control channels are merged into a single integrated pressure control module housing. The module contains multiple solenoid valves, inertia sensors, and pneumatic components arranged in one compact unit, reducing the number of external connectors and connections required while maintaining full functional capability across multiple brake circuits.
Solution Approach 2:
The pressure control module is designed as a universal multi-functional unit that can control multiple brake circuits (front axle, rear axle, parking brake) through a single integrated housing. This multi-functionality eliminates the need for separate dedicated components for each circuit, reducing overall system complexity and connection points.
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 solution enhances the reliability and robustness of the brake system by minimizing measurement errors and reducing the complexity of connections, leading to improved operational reliability and reduced defects.
Implementation Method 1
an oscillation-decoupling arrangement for minimizing the transmission of oscillations from the solenoid valve to the inertial sensor
Implementation Method 2
The inertial sensor is disposed on the circuit board in such a way that the inertial sensor can be decoupled by means of the resilient mounting from oscillations and/or impact sounds
Data Source
AI summary
An electro-pneumatic central pressure control module having at least a single channel, and which is implemented as a component for an electro-pneumatic service brake of a vehicle, having at least one pressure control channel which is electrically controllable with regard to a brake pressure. Also described is an electronic control device of the pressure control module having a board carrying electrical and electronic components, at least one inertial sensor being arranged on or at the at least one board and being electrically conductively connected to at least several of the electrical and electronic components on the board, in which an arrangement/apparatus ensures a lower vibration load of the inertial sensor on the board.