Supercharging Device Segmentation for Thermal Isolation
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Solution Overview
Problem
Existing supercharging devices for internal combustion engines face high production expenditures due to complex assembly processes, particularly when using multiple electric machines and a planetary mechanism, which can lead to thermal loading of temperature-sensitive components and increased production costs.
Innovation Solution
A supercharging device design where the first and second electric machines are arranged on the same side of the planetary mechanism, with the compressor impeller on the opposite side, allowing for simplified construction and improved thermal insulation, reducing thermal loading on the electric machines and enabling a more straightforward assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the planetary mechanism is provided between the two electric machines and they are accommodated in the same housing, then the supercharging device can be compactly arranged, but the production expenditure and assembly complexity increase significantly
Solution Approach 1:
The supercharging device is divided into two separate housings: a first housing accommodating the compressor impeller and planetary mechanism, and a second housing accommodating the two electric machines. This segmentation allows each housing to be optimized independently for its specific function, reducing assembly complexity while maintaining compact arrangement. The planetary mechanism remains integrated with the compressor in the first housing, while the electric machines are separated into the second housing.
Solution Approach 2:
A coupling element serves as an intermediary between the two housings, transmitting mechanical power from the planetary mechanism to the electric machines without requiring direct integration of all components in a single housing. This intermediary coupling allows the system to maintain the functional relationships while reducing assembly complexity through separate housing arrangements.
2Device complexity
If the electric machines are closely integrated with the planetary mechanism, then the device structure is simplified, but thermal loading of temperature-sensitive components increases
Solution Approach 1:
The temperature-sensitive electric machines are extracted from the first housing that contains the compressor impeller and planetary mechanism. By placing the electric machines in a separate second housing, the harmful thermal effects from the compressor are isolated, protecting the electric machines from excessive thermal loading while maintaining a relatively simple overall structure through the coupling element.
Solution Approach 2:
The thermal management is improved by arranging components in different spatial dimensions - the compressor impeller and planetary mechanism occupy the first housing space, while the electric machines are positioned in a separate second housing space. This spatial separation in another dimension allows thermal isolation while maintaining functional integration through the coupling element.
3Ease of manufacture
If all components are integrated in a single housing, then manufacturing is simplified, but cooling efficiency decreases due to thermal interference
Solution Approach 1:
The housing is segmented into two separate housings with distinct thermal zones: the first housing for the compressor impeller and planetary mechanism, and the second housing for the electric machines. This segmentation prevents thermal interference between components, allowing each housing to be cooled independently and efficiently, while the manufacturing process remains relatively simple through standardized coupling elements.
Solution Approach 2:
Each housing is designed with local quality optimized for its specific thermal requirements. The first housing can be designed with cooling features appropriate for the high-temperature compressor, while the second housing can be designed with cooling features appropriate for the electric machines. This local optimization of thermal management improves overall cooling efficiency while maintaining manufacturing simplicity.
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 configuration simplifies the production process, reduces thermal loading on temperature-sensitive components, and enhances cooling efficiency by separating the compressor impeller from the electric machines, resulting in a more cost-effective and efficient supercharging system.
Implementation Method 1
a planetary mechanism (20), a first electric machine (30), a second electric machine (32), a compressor impeller (40)
Implementation Method 2
a first electric machine (30), a second electric machine (32)
Implementation Method 3
a first electric machine (30), a second electric machine (32)
Implementation Method 4
a compressor impeller (40)
Data Source
AI summary
The present disclosure describes a supercharging device for an internal combustion engine of a motor vehicle comprising: a planetary mechanism, a first electric machine, a second electric machine, a compressor impeller, and an internal combustion engine attachment for fastening to a drive output shaft of the internal combustion engine. The first electric machine, the second electric machine and the compressor impeller are connected to one another via the planetary mechanism. Along a longitudinal axis of the supercharging device, the compressor impeller is arranged on a first side of one of the electric machines, and the other of the electric machines is arranged on the second side situated opposite said first side.