Resin Case Motor Compressor Vibration Damping
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Solution Overview
Problem
Motor-driven compressors in hybrid vehicles generate unpleasant noise due to operational vibrations and emitted noise, which existing vibration-damping methods fail to fully mitigate.
Innovation Solution
A motor-driven compressor design featuring a resin case with integrated tubular mounting portions and reinforcing members that effectively dampen vibrations and reduce noise transmission, using a resin with high vibration damping properties to cover the compression and motor housings and attach to vehicle engines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metal housing is used for the compressor, then structural strength is ensured, but vibration damping and noise reduction are insufficient
Solution Approach 1:
The housing employs a composite structure combining metal components (compression mechanism housing, motor housing, mounting portions) with a resin case. The metal portions provide structural strength and mounting functionality, while the resin case provides vibration damping and noise reduction, creating a composite housing system that achieves both strength and noise control.
Solution Approach 2:
Different portions of the housing have different material properties tailored to their specific functions. The mounting portions and compression mechanism housing use metal for strength and vibration transmission control, while the resin case covers these portions to provide localized vibration damping and noise reduction where needed.
2Ease of manufacture
If the compressor is mounted directly to the engine, then installation is simple, but vibrations are transmitted to the vehicle body causing resonance noise
Solution Approach 1:
The mounting portions serve as intermediary elements between the compressor and the engine. These portions include vibration-damping rubber that mediates the connection, reducing vibration transmission to the engine and vehicle body while maintaining the simplicity of direct mounting. The resin case also acts as an intermediary by covering the compression mechanism to reduce emitted noise.
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
Significantly reduces operational and resonance noise by attenuating vibrations and noise emissions, allowing for high-speed operation with a small-capacity compression mechanism, reducing compressor size and cost, and enabling flexible installation on various vehicle configurations.
Implementation Method 1
a case having a main body formed from a resin and covering at least the compression unit and a mounting portion that is provided integrally with the main body and configured to be mounted to the attachment section
Data Source
AI summary
A motor-driven compressor to be mounted to an attachment section of a vehicle includes a fluid compression unit, an electric drive unit for the compression unit and a case. The case has a main body formed from a resin and covering at least the compression unit, and a mounting portion that is provided integrally with the main body and configured to be mounted to the attachment section. The mounting portion has a tubular body provided integrally with the main body and a fastening member inserted into the tubular body for mounting the tubular body to the attachment section. The main body is interposed between the compression unit and the tubular body.