Electromechanical Coupling Assembly Wiring Segregation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic components in vehicular transmissions face challenges due to the hostile environment of hot oil, contaminants, and vibration, leading to issues like long-term embrittlement and fragmentation of insulation, as well as potential short circuits and noise associated with tip-in clunk in powershift transmissions.
Innovation Solution
The implementation of an electromechanical component with a mechanical locking element, excitation coils, and segregated wiring within a controllable coupling assembly, where the locking element engages locking formations to prevent rotation and is protected from the hostile environment by being potted and overmolded, ensuring reliable operation and noise reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electrical wiring is exposed in the transmission environment, then ease of manufacture is improved, but reliability deteriorates due to embrittlement and fragmentation of insulation from hot oil and contaminants
Solution Approach 1:
The patent applies preliminary anti-action by pre-protecting the electrical wiring with potted and overmolded construction before the hot oil and contaminants can cause embrittlement and fragmentation of the insulation. This preventive measure counteracts the harmful environmental effects before they can degrade the wiring, thereby maintaining reliability while keeping the manufacturing process feasible.
2Reliability
If electrical components are segregated from the transmission environment, then reliability is improved, but device complexity increases due to additional protective structures
Solution Approach 1:
The patent merges the protective function with the structural design by integrating the potted and overmolded construction directly into the electromechanical component housing. The protective elements are combined with the mounting structure, creating a unified assembly that segregates electrical components from the transmission environment while avoiding the need for separate, additional protective structures, thus limiting the increase in device complexity.
3Reliability
If locking element engages locking formations to prevent rotation, then reliability is improved, but noise increases due to engagement noise during direction reversal
Solution Approach 1:
The patent applies beforehand cushioning by incorporating damping elements or compliant features in the locking mechanism that absorb the impact energy during engagement. This cushioning effect reduces the engagement noise generated when the locking element engages the locking formations during direction reversal, while maintaining the reliable mechanical coupling needed to prevent rotation.
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 solution effectively protects electrical components from the harsh transmission environment, preventing long-term embrittlement and fragmentation, reducing noise and vibration, and enhancing the reliability and performance of vehicular transmissions by segregating the components from hot temperatures and contaminants.
Implementation Method 1
The component includes a mechanical locking element, at least one excitation coil and electrical wiring to supply electrical power to the at least one excitation coil
Data Source
AI summary
An electronic vehicular transmission and a coupling and control assembly for use herein are provided. A case of the transmission has an environment hostile to electrical components during use of the transmission. A coupling member supported for rotation within the case has a coupling face oriented to face radially with respect to a rotational axis. The transmission also includes an electromechanical component capable of operating in the environment. The component includes a mechanical locking element, at least one excitation coil and electrical wiring to supply electrical power to the at least one excitation coil from a power source outside the environment. The component is mounted to and extends into the environment of the case so that the locking element is in close-spaced opposition to the coupling face and the wiring is segregated from the environment to resist long-term, hot temperature embrittlement and fragmentation of insulation on the wiring.