Muffler for an exhaust system of vehicle

Abstract

Disclosed is a muffler for an exhaust system of a vehicle, which improves fuel efficiency through weight reduction and reduces deterioration of peripheral components. To this end, the present provides a muffler for an exhaust system of a vehicle. More specifically, the muffler includes a triple-material hollow casing, in which an outer layer formed of a plastic material and disposed on the outermost surface of the muffler, an intermediate insulating layer disposed on the inside of the outer layer and containing an aerogel material, and an inner layer formed of a stainless steel material and disposed on the inside of the intermediate insulating layer are stacked.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims under 35 U.S.C. §119(a) the benefit of Korean Patent Application No. 10-2011-0088536 filed Sep. 1, 2011, the entire contents of which are incorporated herein by reference.BACKGROUND[0002](a) Technical Field[0003]The present disclosure relates to a muffler for an exhaust system of a vehicle. More particularly, it relates to a muffler for an exhaust system of a vehicle, which can improve fuel efficiency through weight reduction and reduced deterioration of peripheral components.[0004](b) Background Art[0005]Mufflers are typically installed along the exhaust line as part of the exhaust system of an internal combustion engine or any engine of a motorized vehicle. The muffler reduces exhaust noise through absorption techniques. In particular, the engine exhaust is routed through a series of passages and chambers lined typically with roving fiberglass wool and / or resonating chambers tuned to cause reflected waves that int...

AI Technical Summary

Benefits of technology

The present invention is a muffler for a vehicle exhaust system that prevents damage to peripheral components from high temperature exhaust gas, prevents loss of function from external corrosion, and improves fuel efficiency through weight reduction.

Problems solved by technology

Stainless steel has high thermal conductivity, thus, the high temperature of the exhaust gas is transferred to the component surrounding the muffler (such as a lower vehicle body, fuel tank, etc.) via convection, radiation, or conduction, thereby causing deterioration of the surrounding components as a result.

Moreover, despite the use of stainless steel materials, external corrosion is often caused by the high temperature exhaust gas and by external corrosion promoting substances such as salt water created from deicing salt used in the winter, etc.

Furthermore, perforation corrosion is caused by condensation water, which leads to loss of the attenuation functions of the muffler, thereby rendering the muffler unaffected.

These types of mufflers are effective in reducing high-frequency noise but are ineffective to low-frequency noise.

In particular, the noise tuning corresponding to the vibration frequency (Hz) of the engine and the engine rpm is limited.

Moreover, a large amount of expensive glass fibers must be used as insulating and sound absorbing materials.

Additionally, the glass fibers may cause various problems such as deterioration of assemblability, environmental pollution, difficulties in mass production, etc.

Furthermore, plastic mufflers have a structure in which the exhaust gas is in direct contact with the plastic casing, and thus the plastic casing may melt while vehicle running.

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