JPH0228529U

JPH0228529U -

Info

Publication number: JPH0228529U
Application number: JP10582288U
Authority: JP
Priority date: 1988-08-10
Filing date: 1988-08-10
Publication date: 1990-02-23

Description

[Brief explanation of the drawing]

図面中、第１図は従来の排気制御装置による出
力特性の変化を説明するための図、第２図ないし
第９図は本考案の第１実施例を示すもので、第２
図は一実施例が適用された自動二輪車の概略平面
図、第３図は一実施例が適用された自動二輪車の
概略側面図、第４図は要部の概略を示す外観斜視
図、第５図ａは切換弁の一部を断面した側面図、
第５図ｂは第５図ａのＢ―Ｂ線断面図、第５図ｃ
は第５図ａのＣ―Ｃ線断面図、第６図ａ，ｂは切
換弁の作用説明図、第７図ａ，ｂは同切換弁の他
の切換状態を説明する図、第８図は出力特性の変
化を説明するための図、第９図は本考案と従来例
との出力の対比を示す図、第１０図はａ，ｂは本
考案の第２実施例を示す図である。１……自動二輪車、２……車体フレーム、７…
…内燃機関、１４……排気管、１４ａ……１番排
気管、１４ｂ……２番排気管、１４ｃ……３番排
気管、１４ｄ……４番排気管、１６……ピストン
、１７……クランクシヤフト、１９，２０……集
合管、２１……第２の集合管、２２……切換弁、
２２ａ……ケーシング、２２ｂ……弁体、２４…
…アクチユエータ、２５……コントロールユニツ
ト、３０ａ〜３０ｄ……排気流路、３２ａ，３２
ｂ……連通路、３３……駆動軸、３６……開口、
４０ａ，４０ｂ……切換弁、４１ａ〜４１ｄ……
排気流路、４３ａ，４３ｂ……弁体、４４……駆
動軸、Ａ……排気可変装置。 In the drawings, FIG. 1 is a diagram for explaining changes in output characteristics due to a conventional exhaust gas control device, FIGS. 2 to 9 show a first embodiment of the present invention, and FIG.
The figure is a schematic plan view of a motorcycle to which one embodiment is applied, FIG. 3 is a schematic side view of a motorcycle to which one embodiment is applied, FIG. 4 is an external perspective view schematically showing main parts, and FIG. Figure a is a partially sectional side view of the switching valve;
Figure 5b is a sectional view taken along line BB of Figure 5a, Figure 5c
is a sectional view taken along the line CC in Fig. 5a, Figs. 6a and b are diagrams explaining the operation of the switching valve, Figs. 7a and b are diagrams explaining other switching states of the switching valve, and Fig. 8 is a diagram for explaining changes in output characteristics, FIG. 9 is a diagram showing a comparison of output between the present invention and a conventional example, and FIG. 10 is a diagram showing a and b of the second embodiment of the present invention. . 1...Motorcycle, 2...Body frame, 7...
...Internal combustion engine, 14... Exhaust pipe, 14a... Exhaust pipe No. 1, 14b... Exhaust pipe No. 2, 14c... Exhaust pipe No. 3, 14d... Exhaust pipe No. 4, 16... Piston, 17... Crankshaft, 19, 20... collecting pipe, 21... second collecting pipe, 22... switching valve,
22a...Casing, 22b...Valve body, 24...
...Actuator, 25...Control unit, 30a-30d...Exhaust flow path, 32a, 32
b...Communication path, 33...Drive shaft, 36...Opening,
40a, 40b...Switching valve, 41a to 41d...
Exhaust flow path, 43a, 43b... Valve body, 44... Drive shaft, A... Exhaust variable device.

Claims

[Scope of Claim for Utility Model Registration] (1) A combination of multiple exhaust pipes extending from a multi-cylinder internal combustion engine that extend independently, and which are first brought together. , a variable exhaust gas device for a multi-cylinder internal combustion engine that is switched by a switching valve equipped with a disc-shaped valve body that rotates in the circumferential direction depending on the operating situation of the internal combustion engine, the drive shaft of the disc-shaped switching valve; A variable exhaust system for a multi-cylinder internal combustion engine, characterized in that the exhaust gas is oriented vertically. (2) The exhaust variable variable device for a multi-cylinder internal combustion engine according to claim 1, wherein the switching valve has one drive shaft and is disposed between exhaust flow paths. (3) The multi-cylinder internal combustion engine according to claim 1, wherein the switching valve has a plurality of drive shafts, at least one of which is disposed outside the exhaust flow path. Variable exhaust device.