JPH02148897U

JPH02148897U -

Info

Publication number: JPH02148897U
Application number: JP5802189U
Authority: JP
Priority date: 1989-05-18
Filing date: 1989-05-18
Publication date: 1990-12-18
Anticipated expiration: 2004-05-18
Also published as: JPH0735837Y2

Description

[Brief explanation of the drawing]

第１図はこの考案の第１実施例にかかる排気装
置を示す、第４図の−線拡大断面図、第２図
は第１図の−線断面図である。第３図は小型
滑走艇の概要を示す側面図、第４図は上記第１実
施例の排気装置を小型滑走艇に搭載したエンジン
の排気装置として適用した例を示す平面図、第５
図は同側面図である。第６図はこの考案の第２実
施例にかかる排気装置を示す、前記第２図に対応
する断面図である。第７図はこの考案の第３実施
例にかかるエンジンの排気装置を示す断面図であ
る。第８図及び第９図はこの考案の第４実施例に
かかる排気装置を示し、第８図は平面図、第９図
は側面図である。第１０図〜第１２図はこの考案
の第５実施例を示し、第１０図は平面図、第１１
図は側面図、第１２図は第１０図の−線
断面図、第１３図は第８図及び第１０図の−
線断面図である。第１４図ａ，ｂ及びｃはそ
れぞれ可撓性金属管の正面図、第１５図〜第１７
図は従来の管継手装置の断面図である。１…排気装置、１５…排気マフラ（第１排気管
）、１６…弾性継手、１６ａ…締付けバンド、１
７…外筒、１７ｂ…流通口、２０…排気消音器（
第２排気管）、２０ｃ，２０ｄ…内室部、２０ｅ
…堰壁、３３，３５…導入管、３４…導出管。 1 is an enlarged cross-sectional view taken along the line -- in FIG. 4, showing an exhaust system according to a first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line -- in FIG. 1. FIG. 3 is a side view showing an outline of a small personal watercraft, FIG. 4 is a plan view showing an example in which the exhaust system of the first embodiment is applied as an exhaust system for an engine mounted on a personal watercraft, and FIG.
The figure is the same side view. FIG. 6 is a sectional view corresponding to FIG. 2, showing an exhaust system according to a second embodiment of the invention. FIG. 7 is a sectional view showing an engine exhaust system according to a third embodiment of the invention. 8 and 9 show an exhaust system according to a fourth embodiment of the invention, with FIG. 8 being a plan view and FIG. 9 being a side view. Figures 10 to 12 show a fifth embodiment of this invention, with Figure 10 being a plan view and Figure 11 being a plan view.
The figure is a side view, FIG. 12 is a sectional view taken along the - line in FIG. 10, and FIG. 13 is a - line sectional view in FIGS. 8 and 10.
FIG. Figures 14a, b and c are front views of flexible metal tubes, Figures 15 to 17, respectively.
The figure is a sectional view of a conventional pipe joint device. 1... Exhaust device, 15... Exhaust muffler (first exhaust pipe), 16... Elastic joint, 16a... Tightening band, 1
7... Outer cylinder, 17b... Distribution port, 20... Exhaust silencer (
2nd exhaust pipe), 20c, 20d...Inner chamber part, 20e
...Weir wall, 33, 35... Inlet pipe, 34... Outlet pipe.

Claims

[Claims for Utility Model Registration] 1. An exhaust system for a small personal watercraft, etc., equipped with an elastic joint for connecting a first exhaust pipe and a second exhaust pipe while allowing relative displacement in the longitudinal and radial directions. an outer cylinder with one end open is fitted around the first exhaust pipe with a gap in the radial direction, and the other end of the outer cylinder is fixed to the outer peripheral surface of the first exhaust pipe; The first exhaust pipe is inserted into the second exhaust pipe, which has a slightly larger diameter, and arranged so that the open end of the outer cylinder and the open end of the second exhaust pipe abut against each other with a constant interval. and connecting the outer cylinder and the second exhaust pipe by bringing an elastic joint made of a cylinder such as rubber into close contact with the outer peripheral surfaces of the open end of the outer cylinder and the open end of the second exhaust pipe, respectively; An exhaust system for a small personal watercraft or the like, characterized in that the cooling medium introduced from the outer cylinder is made to flow through the elastic joint and flow into the second exhaust pipe. 2. The exhaust system for a personal watercraft or the like according to claim 1, wherein at the open end of the outer cylinder, a cooling medium flow port is provided only on the upper side of the outer cylinder. 3. An exhaust system for a small personal watercraft, etc., which is equipped with an elastic joint for connecting an exhaust pipe and an exhaust silencer by allowing relative displacement in the longitudinal direction and radial direction, which is provided with a A part of the exhaust pipe is inserted into the exhaust muffler through an opening with a diameter slightly larger than that, and the opening of the exhaust muffler is connected to one end of the outer cylinder. The interior of the exhaust silencer is partitioned into an inner chamber into which the exhaust pipe is inserted and the other inner chambers by a weir wall. The height is the same as or slightly higher than the upper end position of the elastic joint, and the elastic joint made of a cylinder made of rubber or the like is attached to the outer peripheral surface of one end of the outer cylinder and the open end of the exhaust silencer. An exhaust system for a small personal watercraft, characterized in that an outer cylinder and an exhaust muffler are connected in close contact with each other, and cooling water is allowed to flow into the elastic joint from the outer cylinder or the exhaust muffler.