Hybrid Module Oval Air Intake Cooling
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Solution Overview
Problem
Existing hybrid modules in motor vehicle drive trains face challenges in efficiently supplying a sufficient quantity of cooling air while maintaining a compact size, as they typically require larger air slots that increase the module's extent and installation space.
Innovation Solution
An oval air supply means with a short extent directed towards the combustion engine and transmission, featuring a stub with an oval design and an air divider, allowing for a large hydraulic cross section and efficient air distribution within a narrow hybrid module, enabling coaxial screw connections for easy mounting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If air slots are provided in the housing to introduce cooling air, then cooling capability is improved, but the extent of the hybrid module increases
Solution Approach 1:
The air supply means transitions from a radial configuration (in the plane of rotation) to an axial configuration (along the axis of rotation), effectively moving the air supply function to another dimension. This allows the air intake to be positioned at the end face of the housing rather than on the cylindrical surface, reducing the module's radial extent while maintaining cooling capability
Solution Approach 2:
The air supply means is designed with an asymmetric oval cross-section where the short extent is directed toward the combustion engine and transmission, while the long extent provides sufficient hydraulic cross-section for cooling air flow. This asymmetric geometry optimizes both cooling performance and spatial constraints
2Quantity of substance
If a large hydraulic cross section is provided for air supply, then cooling air quantity is improved, but the device complexity increases
Solution Approach 1:
The housing structure serves multiple functions: it contains the hybrid module components, provides structural support, and incorporates the air supply means as an integrated feature. The air supply means itself serves both as a structural element and as the cooling air intake, eliminating the need for separate air supply components
Solution Approach 2:
The air supply means is merged with the housing structure, with the air intake positioned at the end face and distributed through the housing walls. This integration combines the housing's structural function with the cooling air supply function, reducing overall device complexity while maintaining large hydraulic cross-section for sufficient cooling air flow
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 allows for effective cooling of the hybrid module with a relatively small size, reducing installation space requirements while ensuring sufficient air supply and facilitating direct connection between the engine and transmission without the hybrid module.
Implementation Method 1
An air supply means introduces cooling air into the hybrid module
Data Source
AI summary
A hybrid module (1) is installed a drive train of a motor vehicle between a combustion engine and a transmission and has an electric machine and a clutch installed in a common housing (2). The hybrid module (1) further has an air supply entrance (7) for introducing cooling air into the hybrid module (1). The air supply entrance (7) is an oval with a short axis directed toward the combustion engine and the transmission. Thus, the hybrid module has a short extent between combustion engine and transmission, and also allows a sufficiently large quantity of air to be supplied into the hybrid module.