JPH0263033U

JPH0263033U -

Info

Publication number: JPH0263033U
Application number: JP14221388U
Authority: JP
Priority date: 1988-10-31
Filing date: 1988-10-31
Publication date: 1990-05-11
Anticipated expiration: 2003-10-31
Also published as: JPH082431Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例における主要部分を
示す断面図、第２図は第１図の−線で切断し
た部分の断面図、第３図は第１図の−線で切
断した部分の断面図、第４図は第１の例における
第１の連通路が開いた状態を説明する説明図、第
５図は第１図の例における第２の連通路が開いた
状態を説明する説明図、第６図は第１図の例によ
つて得られるエンジンのトルク特性を示す特性線
図、第７Ａ図、第７Ｂ図、第８Ａ図および第８Ｂ
図は第１図の例における連通路部分のテツドスペ
ースの大小を説明する説明図である。符号の説明、１〜６……気筒、１ａ〜６ａ……
吸気ポート、１ｂ〜６ｂ……吸気分岐管、８，９
……吸気集合部、１０……連通管、１１……第１
の連通管部分、１２……第２の連通管部分、１３
，１４……上流吸気管、１５……合流部、２１ａ
，２１ｂ……シヤツターバルブ、２２ａ，２２ｂ
……シヤツターバルブ、２３……第１の連通路、
２４……第２の連通路。 Fig. 1 is a sectional view showing the main parts of an embodiment of the present invention, Fig. 2 is a sectional view of the part taken along the - line in Fig. 1, and Fig. 3 is a sectional view of the part taken along the - line in Fig. 1. FIG. 4 is an explanatory diagram illustrating a state in which the first communication path in the first example is open, and FIG. 5 is an explanatory diagram illustrating a state in which the second communication path in the example in FIG. 1 is open. An explanatory diagram, FIG. 6 is a characteristic diagram showing the torque characteristics of the engine obtained by the example of FIG. 1, and FIGS. 7A, 7B, 8A, and 8B.
The figure is an explanatory diagram illustrating the size of the tread space in the communication path portion in the example of FIG. 1. Explanation of symbols, 1 to 6...Cylinder, 1a to 6a...
Intake port, 1b to 6b... Intake branch pipe, 8, 9
...Intake collecting section, 10...Communication pipe, 11...First
Communication pipe portion, 12...Second communication pipe portion, 13
, 14... Upstream intake pipe, 15... Merging section, 21a
, 21b...shutter valve, 22a, 22b
... Shutter valve, 23 ... First communication path,
24...Second communication path.

Claims

[Claims for Utility Model Registration] The cylinders are divided into first and second sets so that the intake strokes between adjacent cylinders are not continuous, and the first intake pipe is a collection of intake pipes from the first set of cylinders. The system includes a second intake system that collects intake pipes from a second set of cylinders, and a communication passage that allows each intake system to communicate with each other, so as to reduce the dynamic effect of intake air to each cylinder. In an engine intake system which has come to be used for supercharging, the communication passage is connected to a communication pipe formed separately from each intake system, and the communication pipe is connected to both ends of the communication pipe, respectively. and a communication section formed in each of the intake systems, and an on-off valve for controlling opening and closing of communication between the first and second intake systems is disposed in each communication section. Device.