Transmission Power Electronics Integration
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Solution Overview
Problem
In motor vehicles, the lack of space in the transmission for power electronics necessitates separate installation in the vehicle, leading to long cable harnesses and the use of AC cables, which is disadvantageous for manufacturers and increases system complexity.
Innovation Solution
The power electronics and hydraulic transmission control unit are arranged tangentially and/or axially next to each other, allowing the power electronics to be integrated within the transmission housing or oil pan, eliminating the need for separate vehicle installation and reducing cable length to DC connections only.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If power electronics are installed separately in the vehicle, then installation space in the transmission is sufficient, but vehicle space is wasted and cable length increases
Solution Approach 1:
The patent merges the power electronics with the transmission system by integrating them into the same housing structure. The power electronics are mounted on the transmission housing or oil pan, placing them in immediate proximity to the transmission components they serve. This eliminates the need for separate vehicle installation and大幅 reduces cable harness length.
Solution Approach 2:
The patent utilizes the three-dimensional space around the transmission by arranging power electronics in the tangential and axial directions relative to the transmission axis. This spatial arrangement allows integration without interfering with the central transmission components, effectively using available volume in previously underutilized dimensions.
2Device complexity
If power electronics are integrated into the transmission, then cable length is reduced, but installation space becomes insufficient
Solution Approach 1:
The patent applies local quality by designating specific zones within the transmission structure for power electronics installation. The power electronics are mounted on the transmission housing or oil pan surfaces, utilizing localized areas that do not interfere with the central transmission components. This allows integration while preserving the functional space needed for transmission operations.
3Ease of manufacture
If power electronics are placed far from the transmission, then transmission design is simplified, but system efficiency decreases due to long AC cable requirements
Solution Approach 1:
The patent combines the power electronics and transmission into a single integrated unit, eliminating the need for long AC cable connections. The power electronics are positioned immediately adjacent to the transmission components, enabling direct DC connections that significantly improve system efficiency by reducing resistive losses and eliminating the need for AC-to-DC conversion cables.
Data Source
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AI summary
The invention relates to a transmission for a motor vehicle, comprising a hydraulic transmission control unit, a transmission housing, an oil pan, which is attached to the transmission housing, and a power electronics unit, which serves as a converter for an electric machine and is supported on the transmission housing and/or the oil pan. The transmission is characterized in that the hydraulic transmission control unit and the power electronics unit are arranged tangentially and/or axially adjacent to each other at least in some sections with respect to a transmission center axis.