Front-wall dam-board sound insulation structure of passenger compartment

• Main Authors: WAN SHIMING, QIU YIMING, LU YUPENG, GAO HONG, ZHU BO
• Format: Patent
• Language: Chinese; English
• Published: 27.08.2014
• Subjects: LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL; VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR

The utility model relates to the field of mounting of automotive accessories, in particular to a front-wall dam-board sound insulation structure of a passenger compartment. The front-wall dam-board sound insulation structure comprises an elastic layer and a mass layer which are tightly fitted and identical in shape. The mass layer comprises a front portion, a middle portion and a tail portion. The front portion and the middle portion are perpendicularly connected. The tail portion and the middle portion are in obtuse-angle connection. The front-wall dam-board sound insulation structure further comprises a sound absorbing layer fitted to the mass layer. The sound absorbing layer composed of cotton felt is added on the basis of the double-layer sound insulation structure formed by adding a porous liner on a conventional layered coating, and the three-layer structure has two boundary layers and can reflect more noises as compared with the two-layer structure, so that noise generated by an engine can be well insu