JPS63160326U

JPS63160326U -

Info

Publication number: JPS63160326U
Application number: JP5454287U
Authority: JP
Priority date: 1987-04-10
Filing date: 1987-04-10
Publication date: 1988-10-20

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図は前記実施例に
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、３……サージタンク、３ａ，
３ｂ……室、５……吸気絞り弁、９……仕切壁、
９ａ……一端、９ｂ……他端、１０……第１の開
口、１１……第２の開口、１２……第１の開閉弁
、１３……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. 2 is a characteristic diagram of engine torque corresponding to engine rotational speed according to the embodiment. 1...Intake passage, 3...Surge tank, 3a,
3b... Chamber, 5... Intake throttle valve, 9... Partition wall,
9a...one end, 9b...other end, 10...first opening, 11...second opening, 12...first on-off valve, 13...second on-off valve.

Claims

[Scope of utility model registration request]

A surge tank is provided in parallel with an intake passage on the downstream side of an intake throttle valve of an internal combustion engine, and a partition wall inside the surge tank is provided substantially parallel to the intake passage and has one end extending downstream of the intake passage. According to
The partition wall is partitioned into two chambers that communicate only on the one end side, and a first opening that communicates the intake passage downstream of and near the intake throttle valve with the inside of the surge tank is provided on the other end side of the partition wall. A second opening communicating between the intake passage and the inside of the surge tank is provided at one end of the partition wall, and a first on-off valve is provided in the first opening,
A second on-off valve is disposed in each of the second openings, and
and an opening/closing control means for controlling opening/closing of each of the second opening/closing valves according to the engine rotation speed,
The opening/closing control means closes both the first and second opening/closing valves in a low speed rotation region of the internal combustion engine,
Opening only the first on-off valve in a medium speed rotation region,
An intake system for an internal combustion engine, characterized in that both the first and second on-off valves are opened in a high-speed rotation region.