Vehicle Pressure Sensor PCB Integration for Brake Sealing Reliability
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Solution Overview
Problem
Existing electro-pneumatic braking devices for vehicles are complex to manufacture and have reliability issues due to separate pneumatic connections and housing components, which complicate sealing and tolerance compensation.
Innovation Solution
An electro-pneumatic braking device with a direct pneumatic contact between the pressure guide and circuit carrier, eliminating the need for a separate pressure guide element, and featuring a solenoid valve device integrated in a valve block, where the pressure sensor and evaluation unit are directly connected to the circuit carrier, and the sealing is achieved through elastic molded seals or adhesive bonds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate pressure guide elements and housing components are used, then pneumatic connection is achieved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The pressure guide element is integrated directly into the circuit carrier, eliminating the need for separate pressure guide components and housing structures. The circuit carrier simultaneously serves as both the electrical circuit support and the pneumatic pressure guide, reducing the number of parts and assembly steps while improving sealing reliability through direct integration.
2Reliability
If separate pressure guide elements are used, then pneumatic connection is established, but manufacturing complexity increases
Solution Approach 1:
The pressure guide function is merged into the circuit carrier structure, allowing tolerance compensation to be achieved through the circuit carrier's own geometric features rather than requiring separate precision-machined pressure guide elements. This integration simplifies manufacturing by reducing the number of precision assembly operations required.
3Reliability
If pressure sensor is electrically contacted via soldering or welding, then electrical connection is achieved, but component count and assembly steps increase
Solution Approach 1:
The pressure sensor is mounted directly on the circuit carrier, combining the mechanical support, electrical connection, and pneumatic pressure delivery functions into a single integrated location. This eliminates the need for separate housing components and reduces assembly steps while maintaining reliable electrical and pneumatic connections.
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 design simplifies manufacturing, reduces component count, eliminates the need for separate housing and pneumatic connections, and enhances reliability by direct sealing and tolerance compensation, resulting in a more compact and efficient braking system.
Implementation Method 1
the sealing means comprise an elastic molded seal held in a recess in a surface of the pressure guide facing the circuit carrier, which is prestressed against an opposite surface of the circuit carrier
Implementation Method 2
at least one pressure sensor element, which is arranged directly on the circuit carrier and on the latter in such a way that the pressure sensor element is arranged in the region of the pressure guide pressurized by the pressure medium
Data Source
AI summary
The invention relates to an electronic controller (1) for a vehicle, having at least one pressure sensor element (8) and a housing (14) having a pressure guide (4), by means of which a pressure medium (5) is applied to the pressure sensor element (8), and having an evaluating unit (10), which generates a pressure signal dependent on the pressure in the pressure guide (4) detected by the pressure sensor element (8), and having a circuit carrier (2), on which at least one part of a control electronics unit (16) of the controller (1) is arranged, wherein the pressure signal of the evaluating unit (10) is integrated in the control electronics unit (16). According to the invention, a) the pressure guide (4) directly contacts the circuit carrier (2) at least in part and, in the contact region (18) of the pressure guide (4) to the circuit carrier (2), sealing means (20) are arranged which seal a region (12) of the pressure guide (4), pressurized by the pressure medium (5), from the surroundings, and b) the pressure sensor element (8) is directly arranged on the circuit carrier (2) and is also arranged thereon such that the pressure sensor element (8) is arranged in the region (12), pressurized by the pressure medium (5), of the pressure guide (4) , and c) the evaluating unit (10) is directly electrically connected to the circuit carrier (2).