Vehicle ECU Stand Crossmember Structure for Accurate Acceleration Sensing
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Solution Overview
Problem
Existing ECU mounting brackets for vehicles with low stiffness or inertia subframes fail to accurately measure accelerations/decelerations, necessitating specific ECU part numbers and adjustments.
Innovation Solution
A computer support comprising a ribbed plate welded to a crossmember, with the crossmember sandwiched between a stud shoulder and the ribbed plate, ensuring robust anchoring and accurate force transmission, using high-strength steel materials and specific hole configurations for precise positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple ribbed plate mounting bracket is used on a vehicle with low stiffness or inertia subframe, then the device complexity is reduced and ease of manufacture is improved, but the measurement precision of acceleration/deceleration deteriorates
Solution Approach 1:
The mounting bracket is segmented into two distinct components: a ribbed plate for ECU mounting and a crossmember for structural integration. This segmentation allows each component to be optimized independently - the ribbed plate provides simple ECU mounting while the crossmember provides the necessary structural stiffness and inertia for accurate acceleration measurement on vehicles with flexible subframes
Solution Approach 2:
The ribbed plate is nested onto the crossmember, creating a hierarchical structure where the simpler ribbed plate component is mounted on the more robust crossmember. This nesting arrangement allows the complex structural function to be provided by the crossmember while the ribbed plate maintains its simple mounting bracket function
2Measurement precision
If a robust crossmember structure is added to ensure accurate acceleration measurement, then the measurement precision is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The crossmember serves multiple functions simultaneously: it provides structural stiffness and inertia for accurate acceleration measurement, acts as a mounting base for the ribbed plate, and integrates with the vehicle's underbody structure. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity despite the added robustness
3Stability of the object's composition
If the crossmember is made thicker to increase stiffness, then the stability and measurement accuracy are improved, but the weight of the stationary object increases
Solution Approach 1:
The crossmember features localized ribbing that concentrates structural reinforcement only where needed for stiffness and acceleration measurement accuracy. This local quality approach provides the necessary stability without uniformly increasing the thickness and weight of the entire crossmember structure
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
Ensures accurate transmission of acceleration and deceleration forces to the ECU, allowing the use of standard ECUs and reliable impact measurements, maintaining consistent safety module activation thresholds.
Implementation Method 1
a computer support, to be welded onto the underbody of a motor vehicle... the ribbed plate is welded to the crossmember. The screw-fixing means comprise at least one stud passing through the crossmember and the ribbed plate and comprising a shoulder, and the shoulder is welded to one side of the crossmember
Data Source
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AI summary
Computer stand designed to be welded onto a base (100) in a motor vehicle, preferably an electric motor vehicle, in order to form a stand for an on-board vehicle computer, comprising: - a ribbed plate (10), - means for screwing the computer to the computer stand, characterised in that the computer stand comprises a cross member (30) designed to be attached to the base (100) in a transverse direction of the vehicle, and in that the ribbed plate (10) is welded to the cross member (30).