| 摘要 |
PURPOSE:To provide a resonator used effectively as a means for reducing noises of intake air or exhaust gas in an internal combustion engine, which is capable of obtaining a high resonance effect over a wide frequency range, by providing a plurality of resonance chambers the volume of which is decreased gradually, and placing a resonance chamber having a smaller volume in a resonance chamber having a larger volume successively. CONSTITUTION:In case of using a resonator of this invention as a means for reducing noises of intake air, one end of an outer tubular member 151 of a double tubular member 15 is connected to an intermediate portion of an intake duct 13 which is connected to an intake pipe 12. The other end of the outer tubular member 151 is connected to a first housing 40 constituting a first resonance chamber 17a, there is provided a second housing 41 which has a common bottom face with the first housing 40 and has an opening formed coaxially with the opening of the first housing 40. The second housing 41 constitutes a second resonance chamber 17b. Here, arrangement is such that the resonance frequency of the resonator is changed by sliding an inner tubular member 152 on the inside of the outer tubular member 151. |
