JPH0278730U

JPH0278730U -

Info

Publication number: JPH0278730U
Application number: JP15864088U
Authority: JP
Priority date: 1988-12-06
Filing date: 1988-12-06
Publication date: 1990-06-18
Anticipated expiration: 2003-12-06
Also published as: JPH072981Y2

Description

[Brief explanation of drawings]

第１図は本考案の一実施例におけるＶ型６気筒
エンジンの吸気装置の概略平面図、第２図は同要
部正面図、第３図は吸気マニホールドの正面図、
第４図は第１図の―線に沿う吸気マニホール
ドの断面図、第５図は吸気マニホールドの要部断
面平面図、第６図は第１図の―線に沿う断面
図、第７図は第３図の―線に沿うフランジ部
分の断面図、第８図は連通開閉弁およびセカンダ
リバルブの運転状態に対する開閉作動例をトルク
カーブと共に示す特性図である。Ｅ…エンジン、１…エンジン本体、３ａ，３ｂ
…シリンダヘツド、４…吸気装置、５…吸気マニ
ホールド、５ａ…マニホールド本体部、９ａ，９
ｂ…独立吸気通路、１１，１２…集合吸気通路、
１３，１４…低速用吸気通路、１５…連通路、１
５ａ，１５ｂ…分割通路、１６ａ，１６ｂ…連通
開閉弁、２８…連通カバー。 FIG. 1 is a schematic plan view of an intake system for a V-type 6-cylinder engine according to an embodiment of the present invention, FIG. 2 is a front view of the same essential parts, and FIG. 3 is a front view of the intake manifold.
Figure 4 is a sectional view of the intake manifold taken along line - in Figure 1, Figure 5 is a cross-sectional plan view of the main part of the intake manifold, Figure 6 is a sectional view taken along line - in Figure 1, and Figure 7 is a cross-sectional view of the intake manifold taken along line - in Figure 1. FIG. 3 is a sectional view of the flange portion taken along the line ``-'', and FIG. 8 is a characteristic diagram showing examples of opening/closing operations of the communication on-off valve and the secondary valve with respect to operating conditions, together with torque curves. E...Engine, 1...Engine body, 3a, 3b
...Cylinder head, 4...Intake device, 5...Intake manifold, 5a...Manifold body, 9a, 9
b...Independent intake passage, 11, 12...Common intake passage,
13, 14...Low speed intake passage, 15...Communication passage, 1
5a, 15b...Divided passage, 16a, 16b...Communication on/off valve, 28...Communication cover.

Claims

[Scope of utility model registration request]

In an engine having two collective intake passages in which cylinders with non-continuous intake air are connected, a communication passage that communicates both intake passages is formed in a U-shape, and the inside of the communication passage is formed into a plurality of divided passages. An intake system for an engine, characterized in that a communication opening/closing valve is provided to open and close the plurality of divided passages according to engine operating conditions.