Electrified Axle Oil Module Integration for Sealed Internal Channels
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Solution Overview
Problem
Existing drive devices for electrified vehicle axles have oil supply systems that require extensive component expenditure due to separate supply and return lines, which is inefficient.
Innovation Solution
The oil supply system integrates the supply lines as channels within the joining plane between the oil module and transmission, formed from module-side and transmission-side channel segments, eliminating the need for separate line elements and ensuring a hermetic seal without complex manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate supply lines and return lines are installed as separate line elements, then the oil supply system can be assembled with standardized components, but the component expenditure becomes extensive and the system complexity increases
Solution Approach 1:
The patent merges separate supply lines and return lines into a single integrated oil supply system. The housing contains multiple channels (first supply channel, second supply channel, return channel) that are integrated into the housing structure itself rather than being separate line elements. This reduces component expenditure while maintaining assembly feasibility.
Solution Approach 2:
The housing serves multiple functions: it provides structural support, contains the oil supply channels, and acts as a reservoir. The integrated channel system within the housing eliminates the need for separate external piping, reducing overall system complexity while maintaining standardized manufacturing capabilities.
2Device complexity
If supply lines are integrated as channels within the joining plane, then component expenditure is reduced and manufacturing is simplified, but achieving a hermetic seal becomes more challenging
Solution Approach 1:
The oil supply channels are nested within the housing structure itself. The first supply channel, second supply channel, and return channel are all integrated into the housing, with the return channel positioned to receive oil from the electric machine and transmit it back to the oil supply system. This nesting eliminates external piping while maintaining seal integrity through the housing's inherent structural continuity.
Solution Approach 2:
The housing is designed with specific local features to ensure hermetic sealing at critical locations. The return channel includes a return opening that communicates with the interior of the electric machine housing, and the channel walls are configured to maintain proper sealing at interfaces. The integrated design allows for localized seal features where needed while maintaining overall system simplicity.
Data Source
AI summary
A drive device for an electrified vehicle axle of a vehicle, having an electric machine, which outputs via a transmission onto driveshafts, which are led to vehicle wheels of the vehicle axle, and having an oil module, which supplies the electric machine and/or the transmission with oil. The electric machine, the transmission, and the oil module are combined to form a structural unit, in which the oil module is flanged at a joining plane onto the transmission. The oil module supplies the electric machine and/or the transmission with oil via at least one supply line, and the oil can be returned from the electric machine and/or from the transmission to the oil module via at least one return line.