Motor Vehicle Vacuum Pump Sound Damping
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Solution Overview
Problem
Existing electrical motor vehicle vacuum pumps generate high sound emissions due to their operational requirements, necessitating extensive sound damping measures that increase installation space and manufacturing costs.
Innovation Solution
The implementation of a sound damping system with two connected sound damping chambers, where the first chamber is fluidically connected to the pump rotor chamber and the second chamber is connected to the outlet opening arrangement, utilizing a bore arrangement for noise reduction, allowing for a more compact and cost-effective design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If extensive sound damping measures are implemented, then sound emissions are reduced, but installation space and manufacturing costs increase
Solution Approach 1:
The patent combines the sound damping function with the existing pump housing structure by integrating sound damping chambers into the housing assembly. The first sound damping chamber is formed within the housing and connected to the pump rotor chamber, while the second sound damping chamber is integrated into the outlet opening arrangement. This merging approach provides effective sound damping without requiring separate, space-consuming soundproofing components.
Solution Approach 2:
The patent employs a bore arrangement (porous structure) as the sound dampener element within the sound damping chambers. This porous configuration effectively absorbs and dampens sound waves generated by the pump rotor, reducing sound emissions while occupying minimal space within the existing housing structure.
2Object-affected harmful factors
If extensive sound damping measures are implemented, then sound emissions are reduced, but manufacturing costs increase
Solution Approach 1:
The sound damping chambers are integrated into the existing housing assembly structure, combining multiple functions (housing, sound damping, and outlet arrangement) into a single manufactured component. This reduces the number of separate parts that need to be manufactured and assembled, thereby lowering manufacturing costs while maintaining effective sound reduction.
Solution Approach 2:
The bore arrangement sound dampener can be manufactured as an integrated feature of the housing or as a simple insert component. This porous structure provides effective sound damping at low cost, avoiding the need for expensive specialized soundproofing materials or complex multi-component assemblies.
3Object-affected harmful factors
If a complex sound damping element is used, then sound emissions are reduced, but device complexity and installation space increase
Solution Approach 1:
The sound damping system is segmented into two functional chambers: the first sound damping chamber connected to the pump rotor chamber and the second sound damping chamber connected to the outlet opening arrangement. This segmentation allows each chamber to be optimized for its specific function while keeping the overall structure simple and integrated within the existing housing, reducing device complexity compared to a single complex sound damping component.
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 significantly reduces sound emissions, requiring less installation space and lowering manufacturing costs while maintaining effective noise reduction.
Implementation Method 1
a sound damping element for noise reduction is provided, wherein the sound damping element has at least two sound damping chambers connected in series
Data Source
AI summary
An electrical motor vehicle vacuum pump arrangement includes a housing assembly, a pump apparatus arranged therein, a drive motor, and a sound dampener. The housing assembly includes an inlet and an outlet opening arrangement. The pump apparatus includes a pump rotor housing with an inlet- and an outlet-side face wall, and a pump rotor housing part arranged therebetween. The inlet- and the outlet-side face wall and the pump rotor housing part enclose a pump rotor chamber with a pump rotor arranged therein. The drive motor is arranged in the housing assembly. The drive motor includes a motor rotor and a motor stator. The sound damper includes a first and a second sound damping chamber, and a sound dampener element. The first sound damping chamber is connected to the pump rotor chamber and to the second sound damping chamber. The second sound damping chamber is connected to the outlet opening arrangement.