Ventilable silencer unit for vehicles

Abstract

A box type silencer unit includes a ventilation portion, a silencer portion adjacent to the ventilation portion, and a dividing partition located between the ventilation portion and the silencer portion. The ventilation portion is formed of a ventilating passage opened through a front end and a back end of the box body. The silencer portion is formed by closing the front end and the back end of the box body and includes at least one partition plate to make a plurality of silencing passages of different length. Each of the silencing passages communicates with the ventilation passage through at least one opening formed in the dividing partition and at least one of those silencing passages is provided with at least one passage extending partition to extend the length of the silencing passage. This device can be applied to such a portion, e.g., the front grille or bumper of an automobile as cannot take a large area in front of the ventilation or a depth in the ventilating direction.

Dependencies are inferred from the claim text.