JPS6238414U

JPS6238414U -

Info

Publication number: JPS6238414U
Application number: JP12988085U
Authority: JP
Priority date: 1985-08-26
Filing date: 1985-08-26
Publication date: 1987-03-07

Description

[Brief explanation of drawings]

第１図は本考案の実施例に係るエキゾーストマ
ニホールドの構成図、第２図は同エキゾーストマ
ニホールドの第１バルブ開状態、第２バルブ閉状
態に於ける使用状態説明図、第３図は同エキゾー
ストマニホールドの第１バルブ閉状態、第２バル
ブ開状態に於ける使用状態説明図、第４図はエン
ジン回転数が低い場合に於ける体積速度とクラン
ク角との関係を示す図、第５図は同体積速度と周
波数との関係を示す図、第６図は従来に於けるエ
キゾーストマニホールドの構成図、第７図は従来
に於けるエンジン回転数が低い場合の体積速度と
クランク角との関係を示す図、第８図は同体積速
度と周波数との関係を示す図である。１……エキゾーストマニホールド、２……マニ
ホールド管部、３……バルブ部、３ａ……第１バ
ルブ、３ｂ……第２バルブ、５……第１マニホー
ルド管、６……第２マニホールド管、７……第３
マニホールド管、８……第４マニホールド管、９
……第１連通管、１０……第１合流部、１１……
第２合流部、１２……合流管、１３……第３合流
部、１４……第２連通路、１５……第４合流部。 Fig. 1 is a configuration diagram of an exhaust manifold according to an embodiment of the present invention, Fig. 2 is an explanatory diagram of the usage state of the exhaust manifold in the first valve open state and the second valve closed state, and Fig. 3 is the same exhaust manifold. Fig. 4 is a diagram showing the relationship between volume velocity and crank angle when the engine speed is low. Figure 6 is a diagram showing the relationship between volume velocity and frequency. Figure 6 is a configuration diagram of a conventional exhaust manifold. Figure 7 is a diagram showing the relationship between volume velocity and crank angle when the engine speed is low in the past. The figure shown in FIG. 8 is a diagram showing the relationship between the same volume velocity and frequency. DESCRIPTION OF SYMBOLS 1... Exhaust manifold, 2... Manifold pipe part, 3... Valve part, 3a... First valve, 3b... Second valve, 5... First manifold pipe, 6... Second manifold pipe, 7 ...Third
Manifold pipe, 8... Fourth manifold pipe, 9
...First communication pipe, 10...First confluence section, 11...
2nd confluence section, 12...confluence pipe, 13...3rd confluence section, 14...2nd communication path, 15...4th confluence section.

Claims

[Scope of utility model registration request]

It has four manifold pipes, each manifold pipe is communicated via a first communication pipe, and a pair of first merging parts are formed by a pair of outer manifold pipes located at both ends and the first communication pipe. a pair of inner manifold tubes and a first
A pair of second merging parts are formed by the communicating pipe, and 1
In the exhaust manifold, the exhaust pipe joins via a third merging part between the parts of the first communicating pipe located between the pair of second merging parts, and each first merging part of the first communicating pipe and each second adjacent to each first confluence
A pair of first valves for cutting off communication of exhaust gas are arranged between the merging parts, a second communication pipe is arranged between the pair of first merging parts, and the second communication pipe is an exhaust pipe. and the fourth
The first confluence part and the fourth confluence part of the second communication pipe merge at the confluence part.
Exhaust gas communication is cut off between the merging section and the merging section.
A pair of second valves are provided, and when the engine speed is below a predetermined speed, the first valve is closed and the second valve is open, and when the engine speed is above a predetermined speed, the first valve is open. and the second valve is in a closed state.