Electronic Control Unit Housing Stabilizing Element
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Solution Overview
Problem
Conventional housings for electronic control units face mechanical stress due to temperature variations and pressure differences, leading to potential deformation and failure of the sealing element between the main body and cover, which can result in adhesion or cohesion sealant failure.
Innovation Solution
The electronic control unit incorporates a sealed housing with a main body and cover, featuring a sealing element positioned at their interface and housing stabilizing elements that contact the circuit board arrangement and cover, providing additional fixation and limiting deformation, thus preventing sealant failure and enhancing stiffness and vibration performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the housing is sealed with a sealing element between the main body and cover, then protection from pollutants is improved, but mechanical stress from temperature variations and pressure differences causes deformation and sealant failure
Solution Approach 1:
The patent introduces housing stabilizing elements at specific locations where stress concentration occurs, creating localized reinforcement without changing the overall housing structure. These stabilizing elements are strategically positioned to counteract deformation at critical areas, thereby maintaining sealing effectiveness while preserving the lightweight sealed housing design.
Solution Approach 2:
The housing stabilizing elements are pre-installed within the housing structure to provide anticipatory support against thermal expansion and pressure-induced deformation. By having these stabilizing elements in place before environmental stress occurs, the housing is pre-prepared to resist deformation, preventing sealant failure before it happens rather than reacting to damage after it occurs.
2Stability of the object's composition
If additional fixation elements are added to prevent housing deformation, then structural stability is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the housing stabilizing elements with existing housing components such as the circuit board mounting structure or internal support ribs. By merging the stabilizing function into already-present structural elements, the patent achieves enhanced housing stability without adding separate fixation components, thereby avoiding increased device complexity and manufacturing cost.
Solution Approach 2:
The housing stabilizing elements serve multiple functions: they provide structural reinforcement to prevent deformation, act as mounting points for electronic components, and maintain internal spacing. This multi-functionality eliminates the need for dedicated fixation elements, reducing overall device complexity while achieving the desired stability.
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 reduces the risk of sealing element damage from mechanical stress, eliminates the need for additional fixations, and improves the housing's stiffness and vibration performance, while maintaining a compact and cost-effective structure.
Implementation Method 1
Due to differences in the coefficients of thermal expansion of the main body and of the cover and to positive or negative differences between internal and external pressure (overpressure or under-pressure, respectively), the housing is subject to mechanical stress. Such stress may cause deformation of the parts, in particular the cover
Implementation Method 2
Along the border area of contact between the main body and the cover, the housing comprises a sealing element, for example constituted by a gasket, an O-ring or a viscous dispensed material. The sealing element prevents pollutants, such as dust, water or oil from entering the housing through the border area.
Implementation Method 3
Differences in temperature between the sealed inner volume of the housing and the external environment may in turn cause pressure differences between a gas inside the housing and the ambient atmosphere surrounding the housing
Data Source
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AI summary
An electronic control unit (1) is disclosed. It comprises a sealed housing (10) including a main body (11) and a cover (12) fixed to one another and a sealing element (40) in contact with one and/or the other of the main body (11) and the cover (12). It further comprises a circuit board arrangement in the housing (10) which comprises a circuit board (20). In addition, it comprises at least one housing stabilizing element (50) in contact with the circuit board arrangement and one or the other of the main body (11) and the cover (12).