JPS63177628U

JPS63177628U -

Info

Publication number: JPS63177628U
Application number: JP6795587U
Authority: JP
Priority date: 1987-05-08
Filing date: 1987-05-08
Publication date: 1988-11-17

Description

[Brief explanation of drawings]

第１図は本考案に係る内燃エンジンの吸気装置
の一実施例を示す断面図、第２図は第１図の―
断面図、第３図は第１図の―断面図、第４
図は第１図の実施例によるエンジン回転速度に対
応したエンジントルクの特性図である。１……吸気通路、２……空気室、２ｆ，２ｇ，
２ｈ，２ｉ……第２の開口、２ｊ……第３の開口
、３……第１分岐通路、４……第２分岐通路、６
……吸気絞り弁、７……仕切壁、７ａ……連通孔
、７ｂ，７ｃ……第１の開口、８……サージタン
ク室、９……吸気通路室、１２ａ，１２ｂ……第
１の開閉弁、１５……第２の開閉弁。 FIG. 1 is a sectional view showing an embodiment of an intake system for an internal combustion engine according to the present invention, and FIG.
The cross-sectional view, Figure 3, is the cross-sectional view of Figure 1, Figure 4.
The figure is a characteristic diagram of the engine torque corresponding to the engine rotation speed according to the embodiment of FIG. 1. 1...Intake passage, 2...Air chamber, 2f, 2g,
2h, 2i...second opening, 2j...third opening, 3...first branch passage, 4...second branch passage, 6
...Intake throttle valve, 7...Partition wall, 7a...Communication hole, 7b, 7c...First opening, 8...Surge tank chamber, 9...Intake passage chamber, 12a, 12b...First opening On-off valve, 15... second on-off valve.

Claims

[Scope of utility model registration request]

An air chamber is provided in an intake passage downstream of an intake throttle valve of an internal combustion engine, and the air chamber is partitioned into a surge tank chamber and an intake passage chamber by a partition wall provided substantially parallel to the intake passage. The partition wall is provided with a communication hole that communicates between the upstream side of the intake passage indoors and the surge tank chamber, and a first opening that communicates between the downstream side of the intake passage indoors and the surge tank chamber,
A second opening is provided in the intake passage chamber further downstream from the first opening, and a third opening is provided in the surge tank chamber, and a third opening is provided in the surge tank chamber and communicates with the cylinder of the internal combustion engine. At the same time, a second branch passage is connected to the first branch passage and the second opening is connected to the first branch passage, and a first on-off valve is connected to the first opening and a second opening is connected to the third opening. the first and second on-off valves are respectively disposed, and includes an on-off control means for controlling the opening and closing of each of the first and second on-off valves according to the engine rotational speed, and the opening and closing control means is configured to control the opening and closing of each of the first and second on-off valves according to the engine rotational speed. Both the first and second on-off valves are closed in the region, only the first on-off valve is opened in the medium-speed rotation region, and at least the second on-off valve is opened in the high-speed rotation region. An intake system for an internal combustion engine characterized by: