公开(公告)号：US5096446A

公开(公告)日：1992-03-17

申请号：US569998

申请日：1990-08-20

Applicant: Hiroshi Tazaki ,  Kazumasa Ito ,  Atsushi Sugawara

Inventor： Hiroshi Tazaki ,  Kazumasa Ito ,  Atsushi Sugawara

IPC: B63H20/26 ,  F01N1/08 ,  F01N3/04 ,  F01N13/12

CPC classification number: F01N13/005 ,  B63H20/245 ,  F01N1/089 ,  B63B2770/00 ,  F01N2490/04 ,  F01N2490/12 ,  F01N2530/20 ,  F01N2590/022 ,  F01N3/04

Abstract: A number of embodiments of exhaust silencers for marine propulsion units including an exhaust device having a first expansion chamber, a pair of second expansion chambers and a third expansion chamber all formed within a common housing. The flow of exhaust gases is from the exhaust of the engine into the first expansion chamber, directly from the first expansion chamber into each of the pair of second expansion chambers and directly from the second expansion chambers to the third expansion chamber. In all embodiments the flow from the second expansion chambers to the third expansion chamber is in confronting relationships so as to improve silencing. In one embodiment, the second expansion chambers have different effective volumes so as to provide an extended range of tuning for the silencing.

Abstract translation: 用于船用推进装置的排气消音器的多个实施例包括具有第一膨胀室，一对第二膨胀室和第三膨胀室的排气装置，所述排气装置全部形成在公共壳体内。 排气的流动从发动机的排气到第一膨胀室，直接从第一膨胀室进入一对第二膨胀室，并直接从第二膨胀室到第三膨胀室。 在所有实施例中，从第二膨胀室到第三膨胀室的流动是面对的关系，以便改善沉默。 在一个实施例中，第二膨胀室具有不同的有效体积，以便为沉默提供扩展的调谐范围。