JPS63174561U

JPS63174561U -

Info

Publication number: JPS63174561U
Application number: JP18920186U
Authority: JP
Priority date: 1986-12-10
Filing date: 1986-12-10
Publication date: 1988-11-11

Description

[Brief explanation of the drawing]

第１図は本考案に係る排気ガス再循環装置の一
実施例の概略構成図である。１…エンジン、２…吸気マニホールド、３…ス
ロツトルバルブ、４…排気マニホールド、５…排
気ガス取入れポート、６…排気ガス注入ポート、
７…排気ガス再循環通路、８…排気ガス再循環制
御弁、９…弁ポート、１０…弁要素、１２…ダイ
ヤフラム装置、１３…ダイヤフラム、１４…ダイ
ヤフラム室、１６…第１吸気管負圧取出しポート
、１７…負圧導管、１８…絞り要素、１９…負圧
調整弁、２１…ダイヤフラム室、２２…大気緩衝
室、２６…オリフイス要素、２７…圧力室、３０
…第２吸気管負圧取出しポート、３１…導管、３
２…負圧制御弁、３４…弁体、３５…ダイヤフラ
ム室、３７…サクシヨン圧取出しポート、４０…
チエツクバルブ。 FIG. 1 is a schematic diagram of an embodiment of an exhaust gas recirculation device according to the present invention. 1...Engine, 2...Intake manifold, 3...Throttle valve, 4...Exhaust manifold, 5...Exhaust gas intake port, 6...Exhaust gas injection port,
7... Exhaust gas recirculation passage, 8... Exhaust gas recirculation control valve, 9... Valve port, 10... Valve element, 12... Diaphragm device, 13... Diaphragm, 14... Diaphragm chamber, 16... First intake pipe negative pressure extraction Port, 17... Negative pressure conduit, 18... Throttle element, 19... Negative pressure regulating valve, 21... Diaphragm chamber, 22... Atmospheric buffer chamber, 26... Orifice element, 27... Pressure chamber, 30
...Second intake pipe negative pressure extraction port, 31...Conduit, 3
2... Negative pressure control valve, 34... Valve body, 35... Diaphragm chamber, 37... Suction pressure extraction port, 40...
Check valve.

Claims

[Scope of Claim for Utility Model Registration] When the throttle valve opens into the intake passage at a position upstream of the throttle valve in the fully closed position and is opened by a relatively small first predetermined opening or more,
a first intake pipe negative pressure take-out port 16 located downstream of the throttle valve; a throttle valve that opens into the intake passage at a position upstream of the first intake pipe negative pressure take-off port; a second intake pipe negative pressure outlet port 30 located downstream of the throttle valve when opened to a second predetermined opening greater than the predetermined opening; activated by the diaphragm device 12 to recirculate exhaust gas; an exhaust gas recirculation control valve 8 that controls opening and closing in the middle of the passage 7 and operates to increase its opening amount in accordance with an increase in the negative pressure acting on the diaphragm chamber 14; a negative pressure conduit 17 connecting the diaphragm chamber to the intake pipe negative pressure outlet port; provided at a position upstream of the exhaust gas recirculation control valve in the middle of the exhaust gas recirculation passage; an orifice element 26 defining a pressure chamber 27 between the control valve; and a negative pressure regulating valve provided in the middle of the negative pressure conduit and regulating the negative pressure acting on the diaphragm chamber of the exhaust gas recirculation control valve. 19, wherein the negative pressure regulating valve includes a diaphragm 20, a diaphragm chamber 21 defined on one side of the diaphragm and into which the pressure of the pressure chamber is introduced, and a diaphragm chamber 21 on the other side of the diaphragm. An atmospheric buffer chamber 22 defined on the side of
the second intake pipe negative; A passage 3 connecting the pressure extraction port 30 to the atmospheric buffer chamber 22 of the negative pressure regulating valve 19
1, a diaphragm chamber 35 of the negative pressure control valve is connected to the exhaust passage via a check valve 40 for introducing suction pressure, and the negative pressure is adjusted according to the suction pressure in the exhaust passage. An exhaust gas recirculation device characterized in that a control valve controls opening and closing of a passage 31.