Electronic Control Unit Noise Filter Stabilization
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Solution Overview
Problem
Existing electronic control units for vehicle brake fluid pressure control systems face challenges in stabilizing noise filters, such as choke coils, during excessive vehicle vibrations, leading to instability in their attachment to the housing.
Innovation Solution
The electronic control unit incorporates a housing with a support portion and a noise filter featuring an engaging portion that securely engages with the support portion, including a core member with magnetic properties and a case, and connection terminals, ensuring stable attachment even during vibrations through a guided engagement mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the noise filter is supported by connection terminals, then the structure is simple, but the noise filter cannot be held stably during excessive vehicle vibrations
Solution Approach 1:
The support function is segmented between two distinct elements: connection terminals for electrical connection and support portions for mechanical support. This separation allows each component to perform its specialized function effectively, with support portions providing stable mechanical anchoring during vibrations while connection terminals handle electrical connections.
Solution Approach 2:
Support portions act as intermediary elements between the housing and the noise filter. These intermediary structures transfer and distribute vibrational forces, preventing direct transmission between the housing and the noise filter, thereby maintaining stable attachment during excessive vehicle vibrations.
2Reliability
If the engaging portion is press-fitted in the support groove, then the holding stability is improved, but the assembly process becomes more complex
Solution Approach 1:
The support groove is pre-formed in the housing with precise dimensions and geometry before assembly. This preliminary preparation ensures that when the engaging portion is inserted, it automatically aligns and press-fits into the correct position, reducing assembly complexity while maintaining holding stability.
Solution Approach 2:
The press-fit design allows the engaging portion to self-align and self-secure within the support groove through elastic deformation and friction. The interference fit creates a self-locking mechanism that maintains holding stability without requiring additional fastening operations or complex assembly tools.
Data Source
AI summary
One embodiment provides an electronic control unit. The electronic control unit includes a housing and a noise filter. The housing includes an accommodating portion, and the accommodating portion includes a support portion. The noise filter includes an engaging portion, and at least part of the noise filter is housed in the accommodating portion of the housing. When the at least part of the noise filter is housed in the accommodating portion of the housing, the engaging portion is in engagement with the support portion.