| 摘要 |
PURPOSE:To secure an excellent sound isolating effect, by forming an air box to be installed in a lower part of the rear end of an engine hood into a closed sectional structure with a cowl top panel and a dash upper panel, while making up an outside air opening part to be installed in the cowl top panel with a porous sintered member. CONSTITUTION:An air box to be set up in a lower part of the rear end of an engine hood 1 is formed into a closed sectional structure with a cowl top panel 2 and a dash upper panel 3 and an outside air opening 4 is installed in the former's panel 2, while an outside air leading port 5 is installed in the latter's panel 3 at the position dislocated out of the opening 4. In this case, the said outside air opening 4 is made up so as to be covered with an almost rectangular outside air intak plate 16 formed with a porous aluminum plate. With this constitution, a reduction in various noises leaking inside a car room is well promoted through the air box without entailing any loss in a fresh-air leading quantity to be taken inside the air box. |
