JPH0476956U

JPH0476956U -

Info

Publication number: JPH0476956U
Application number: JP12007090U
Authority: JP
Priority date: 1990-11-16
Filing date: 1990-11-16
Publication date: 1992-07-06

Description

[Brief explanation of drawings]

第１〜４図は本考案の一実施例としての排気再
循環装置を示すもので、第１図はその模式的平面
図、第２図はその要部を拡大して示す模式的平面
図、第３図は第２図の−矢視断面図、第４図
は４気筒テイーゼルエンジンの各気筒でのＥＧＲ
率のばらつき状態を説明するためのトレードオフ
特性図であり、第５，６図は従来の排気再循環装
置を示すもので、第５図はその全体構成図、第６
図はその作用を説明するための模式的平面図であ
る。１……吸気マニホルド、１ａ……吸気マニホル
ド枝管部分、２……吸気マニホルド集合部、３…
…吸気通路、４……排気再循環通路（ＥＧＲ通路
）、５……排気再循環弁（ＥＧＲ弁）、６……気
筒、７……燃焼室、８……エアクリーナ、９……
電子制御ユニツト（ＥＣＵ）、１０……通路切換
ソレノイドバルブ、１１……デユーテイソレノイ
ドバルブ、１２……オルタネータ、１３……バキ
ユームポンプ、１４……水温センサ、１５……エ
ンジン回転速度センサ、１６……燃料噴射ポンプ
、１７……排気通路、１８……排気弁、１９……
排気マニホルド、１９ａ……排気ポート、２０，
２１……ＥＧＲ通路付き二股管の出口、２２……
二股管、２３……案内板。 1 to 4 show an exhaust gas recirculation device as an embodiment of the present invention, in which FIG. 1 is a schematic plan view thereof, and FIG. 2 is a schematic plan view showing an enlarged main part thereof. Figure 3 is a sectional view taken along the - arrow in Figure 2, and Figure 4 is EGR in each cylinder of a 4-cylinder tasel engine.
Figures 5 and 6 show a conventional exhaust gas recirculation system; Figure 5 is its overall configuration diagram;
The figure is a schematic plan view for explaining the effect. DESCRIPTION OF SYMBOLS 1...Intake manifold, 1a...Intake manifold branch pipe part, 2...Intake manifold gathering part, 3...
...Intake passage, 4...Exhaust gas recirculation passage (EGR passage), 5...Exhaust gas recirculation valve (EGR valve), 6...Cylinder, 7...Combustion chamber, 8...Air cleaner, 9...
Electronic control unit (ECU), 10... Passage switching solenoid valve, 11... Duty solenoid valve, 12... Alternator, 13... Vacuum pump, 14... Water temperature sensor, 15... Engine rotation speed sensor, 16...Fuel injection pump, 17...Exhaust passage, 18...Exhaust valve, 19...
Exhaust manifold, 19a...exhaust port, 20,
21... Outlet of two-way pipe with EGR passage, 22...
Bifurcated pipe, 23...information board.

Claims

[Scope of Claim for Utility Model Registration] (1) In an exhaust gas recirculation device in which exhaust gas from a multi-cylinder engine is returned to the engine combustion chamber together with intake air through an exhaust gas recirculation valve, the exhaust gas is returned through the exhaust gas recirculation valve. A bifurcated pipe is provided at the converging part of the intake manifold for causing the exhaust gas to flow into the converging part of the intake manifold from two outlets, and a guide plate is provided at each of the converging parts of the bifurcated pipe to guide the exhaust gas from each outlet of the bifurcated pipe. An exhaust gas recirculation device, characterized in that the exhaust gas recirculation device is provided in a gathering part of the intake manifold near the outlet. (2) When the upstream intake passage leading to the gathering part of the intake manifold is curved, the area of each outlet of the bifurcated pipe is set to be different. Exhaust gas recirculation device.