Vehicle Steering Dust Pack Housing Noise Attenuation
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Solution Overview
Problem
Noise generated by an engine room and gear box leaks through the gap between the dust pack housing and dash panel, disturbing the driver in a vehicle's steering apparatus.
Innovation Solution
A steering apparatus with a dust pack housing and a noise attenuation member, where the noise attenuation member is placed between the dust pack housing and the pinion shaft to attenuate noise, reducing its transmission to the dash panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the dust pack housing is used to support the dash panel, then the structural support function is achieved, but noise leaks through the gap between the dust pack housing and dash panel
Solution Approach 1:
A noise attenuation member is introduced as an intermediary component between the dust pack housing and the dash panel. This member fills the gap and blocks noise transmission paths while maintaining the structural support function of the dust pack housing assembly.
Solution Approach 2:
The noise attenuation member is made of foam material which provides both noise attenuation properties and structural filling capabilities. This composite approach combines the structural support of the housing with the noise-blocking properties of the foam material.
2Object-affected harmful factors
If the gap between dust pack housing and dash panel is reduced, then noise leakage is minimized, but the structural flexibility and assembly tolerance are reduced
Solution Approach 1:
The foam noise attenuation member acts as a flexible filling material that can adapt to various gap sizes and shapes. It provides effective noise blocking while accommodating assembly tolerances and providing structural flexibility.
3Object-affected harmful factors
If a noise attenuation member is added between the dust pack housing and pinion shaft, then noise transmission is reduced, but the device complexity increases
Solution Approach 1:
The noise attenuation member serves multiple functions: it attenuates noise transmitted through the dust pack housing, fills gaps to prevent noise leakage, and provides structural support. This multi-functionality reduces the need for separate components for each function.
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
Effectively prevents noise from being transmitted to the inside of the dash panel by primary attenuation through the dust pack housing and secondary attenuation by the noise attenuation member, enhancing driver comfort.
Implementation Method 1
a noise attenuation member disposed between the dust pack housing and the pinion shaft having a plate shape so that an inner side of the noise attenuation member is spaced apart from the pinion shaft and an outer side of the noise attenuation member is fitted to the dust pack housing to attenuate noise that is transmitted to the inside of the dust panel
Data Source
AI summary
A steering apparatus of a vehicle includes: a dust pack housing coupled to a top portion of a dust cap, which is combined with a rack housing to surround a pinion shaft, the dust pack housing disposed between and supporting a dash panel of the vehicle and the dust cap; and a noise attenuation member disposed between the dust pack housing and the pinion shaft and having plate shape so that an inner side of the noise attenuation member is spaced apart from the pinion shaft and an outer side of the noise attenuation member is fitted to the dust pack housing to attenuate noise that is transmitted to the inside of the dust panel.