Dual-Function Carrier for Refrigerant Compressor Vibration Decoupling
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Solution Overview
Problem
Existing retention arrangements of refrigerant compressors on motor vehicle bodyworks fail to effectively decouple vibrations, leading to excessive structure-borne noise emissions that compromise travel comfort.
Innovation Solution
A dual-function carrier is used to securely attach both the refrigerant compressor and an additional electrical component to the vehicle bodywork, providing a two-stage vibration decoupling mechanism that prevents unwanted noise by acting as an intermediate mass and using resiliently deformable elements to absorb vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the refrigerant compressor is directly fixed to the bodywork, then the retention structure is simple and cost-effective, but excessive structure-borne noise emissions occur compromising travel comfort
Solution Approach 1:
The patent introduces a carrier as an intermediary component between the refrigerant compressor and the bodywork. This carrier serves as a mediator that decouples the direct connection, thereby reducing structure-borne noise emissions while maintaining a simple and cost-effective retention structure. The carrier is retained on the bodywork and provides a buffer that prevents direct vibration transmission.
Solution Approach 2:
The retention structure is segmented into multiple independent components: the bodywork, the carrier, and the refrigerant compressor. This segmentation allows each component to be optimized independently and creates decoupling points that reduce vibration transmission. The carrier is retained on the bodywork separately from how the compressor is retained on the carrier, creating distinct retention stages.
2Object-affected harmful factors
If a carrier is introduced to retain both the refrigerant compressor and an additional electrical component, then two-stage vibration decoupling is achieved reducing noise emissions, but the device complexity increases
Solution Approach 1:
The carrier is designed as a multi-functional component that serves dual purposes: it retains the refrigerant compressor and simultaneously retains an additional electrical component (such as a battery, control unit, or starter generator). This multi-functionality reduces the overall number of separate retention structures needed, thereby limiting the increase in device complexity while achieving two-stage vibration decoupling.
Solution Approach 2:
The patent merges the retention functions for the refrigerant compressor and the electrical component into a single carrier structure. By combining these retention functions, the overall structure remains relatively simple despite providing multi-stage vibration decoupling. The carrier integrates multiple retention tasks that would otherwise require separate structures.
3Object-affected harmful factors
If additional weight-intensive modifications are made to achieve vibration decoupling, then noise emissions are reduced, but the vehicle weight increases
Solution Approach 1:
The carrier utilizes its own mass and structural properties to provide vibration decoupling without requiring additional weight-intensive modifications. The carrier's design leverages its inherent characteristics as an intermediate mass to reduce structure-borne noise emissions, achieving vibration decoupling through intelligent design rather than added weight.
Solution Approach 2:
The patent changes the parameters of the retention structure by introducing a carrier with specific mass and structural properties that optimize vibration decoupling. Rather than adding weight-intensive damping materials or complex active control systems, the solution modifies the retention structure's parameters (mass distribution, stiffness, geometry) to achieve effective noise reduction.
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 solution significantly reduces structure-borne noise emissions, enhancing travel comfort while maintaining a lightweight and cost-effective design suitable for various vehicle configurations without the need for additional weight-intensive modifications.
Implementation Method 1
The carrier is retained on the bodywork in a vibration-decoupled manner, in particular by way of a resiliently deformable element
Implementation Method 2
a two-stage vibration decoupling mechanism that prevents unwanted noise by acting as an intermediate mass and using resiliently deformable elements to absorb vibrations
Data Source
AI summary
A retention arrangement is provided for a refrigerant compressor on a bodywork of a motor vehicle. The compressor is designed to compress a coolant of an air conditioning system. The refrigerant compressor is at least indirectly secured to the bodywork by the retention arrangement wherein the refrigerant compressor is held on the bodywork by a carrier or intermediary support which is itself held on the bodywork and on which at least one electrical component of the motor vehicle is held. The electrical component is different from the refrigerant compressor.