| 摘要 |
FIELD: mechanical engineering; transport engineering. ^ SUBSTANCE: invention is structure of wheeled vehicle, particularly, passenger car, whose load-bearing members of body are made in form of box-shaped hollow sections, namely, sills, reinforcements, pillars, provided with local sealing sound-isolating members overlapping air sound-transmitting through sections of hollow load-bearing members in preset zones. Said vehicle, particularly passenger car, contains load-bearing box-shaped members of body inside spaces of which sealing sound-isolating members in form acoustic stoppers are locally arranged which overlap passenger sections of spaces with formation of limited lengths of hollow load-bearing members. Through drain holes are made in walls of separate limited lengths of sections of hollow members separated/formed by end faces of acoustic stoppers, particularly, in spaces of body floor, sills, adjacent to space of passenger salon, and external medium surrounding vehicle body. Simultaneously noise absorber is installed in space of body central pillar. Said noise absorber is made in form of inserted member made of porous noise-absorbing material permeable to air. Invention provides high noise isolation of saloon space of body owing to weakening of process of sound transmission by drain holes through hollow box-bearing members of body into space of passenger saloon (cab) both from side of engine compartment and trunk which is provided by use of acoustic stoppers and from side of noisy space under body floor by use of sound absorber permeable to air in space of body central pillar. ^ EFFECT: improved sound isolation of vehicle. ^ 3 cl, 3 dwg |
