JPH0475150U

JPH0475150U -

Info

Publication number: JPH0475150U
Application number: JP11776090U
Authority: JP
Priority date: 1990-11-09
Filing date: 1990-11-09
Publication date: 1992-06-30

Description

[Brief explanation of the drawing]

第１〜３図は本考案の第１実施例としての排気
再循環装置を示すもので、第１図は本装置の概略
平面図、第２図は本装置の模式的側面図、第３図
は４気筒デ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４図は本考案の第２実施例とし
ての排気再循環装置を有するエンジンのシリンダ
ヘツド部を模式的に示す縦断面図であり、第５図
は本考案の第３実施例としての排気再循環装置を
有するエンジンの気筒上部を模式的に示す図であ
り、第６，７図は従来の排気再循環装置を示すも
ので、第６図はその全体構成図、第７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…
…排気分配管、２１……排気分配管の枝管部分、
２２……シリンダヘツド、２３……丸形膨出部、
２４……吸気スワールポート、２５……吸気弁、
２６……ＥＧＲ専用の補助弁。 1 to 3 show an exhaust gas recirculation device as a first embodiment of the present invention, where FIG. 1 is a schematic plan view of the device, FIG. 2 is a schematic side view of the device, and FIG. 3 is a schematic side view of the device. is EGR in each cylinder of a 4-cylinder diesel engine.
FIG. 4 is a longitudinal sectional view schematically showing a cylinder head portion of an engine having an exhaust gas recirculation device as a second embodiment of the present invention. , FIG. 5 is a diagram schematically showing the upper part of the cylinder of an engine having an exhaust gas recirculation device as a third embodiment of the present invention, and FIGS. 6 and 7 show conventional exhaust gas recirculation devices. FIG. 6 is an overall configuration diagram thereof, and FIG. 7 is a schematic plan view for explaining its operation. 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...
...Exhaust distribution piping, 21... Branch pipe part of exhaust distribution piping,
22... Cylinder head, 23... Round bulge,
24...Intake swirl port, 25...Intake valve,
26...Auxiliary valve exclusively for EGR.

Claims

[Scope of Claim for Utility Model Registration] (1) In an exhaust gas recirculation device that returns exhaust gas from a multi-cylinder engine 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. 1. An exhaust gas recirculation system, characterized in that an exhaust distribution pipe having branch pipe parts for the number of cylinders is provided separately from an intake manifold in order to distribute the exhaust gas that comes from the multi-cylinder engine to each cylinder of the multi-cylinder engine. (2) The exhaust gas recirculation device according to claim 1, wherein the downstream end of the branch pipe portion of the exhaust distribution pipe is connected to the branch pipe portion of the intake manifold. (3) Claim characterized in that the multi-cylinder engine is configured as an engine having an intake swirl port, and a downstream end of a branch pipe portion of the exhaust distribution pipe is connected to the intake swirl port. 1. The exhaust gas recirculation device according to 1. (4) The downstream end of the branch pipe portion of the exhaust distribution pipe is connected to the combustion chamber of the multi-cylinder engine, and an intake valve and an intake valve are connected to the connection portion of the branch pipe portion of the exhaust distribution pipe to the combustion chamber. 2. Exhaust gas recirculation device according to claim 1, characterized in that an auxiliary valve operating synchronously is provided.