JPS6252211U

JPS6252211U -

Info

Publication number: JPS6252211U
Application number: JP14213985U
Authority: JP
Priority date: 1985-09-18
Filing date: 1985-09-18
Publication date: 1987-04-01

Description

[Brief explanation of the drawing]

第１図および第２図はこの考案に係るブローバ
イガス還元装置の一実施例を示したものであり、
第１図は全体構成図、第２図は還流装置および制
御装置の各断面図、第３図および第４図は従来の
ブローバイガス還元装置を示す図であり、第３図
はその全体構成図、第４図は機関回転速度とクラ
ンクケース圧力との関係を示すグラフである。１……機関本体、２Ａ……吸気マニホルド、２
Ｂ……吸気通路、４……過給機、４Ｃ……コンプ
レツサハウジング、４Ｄ……タービンハウジング
、６……一方のブローバイ還流通路、７……ブロ
ーバイコントロールバルブ、９……他方のブロー
バイ還流通路、１０……絞り弁、１５Ａ……排気
通路、１７……還流装置、３０……制御装置、３
２……ピストン（制御弁）。 Figures 1 and 2 show an embodiment of the blow-by gas reduction device according to this invention.
Fig. 1 is an overall configuration diagram, Fig. 2 is a sectional view of a reflux device and a control device, Figs. 3 and 4 are diagrams showing a conventional blow-by gas reduction device, and Fig. 3 is an overall configuration diagram thereof. , FIG. 4 is a graph showing the relationship between engine rotational speed and crankcase pressure. 1...Engine body, 2A...Intake manifold, 2
B... Intake passage, 4... Supercharger, 4C... Compressor housing, 4D... Turbine housing, 6... One blow-by return passage, 7... Blow-by control valve, 9... Other blow-by return passage. , 10... Throttle valve, 15A... Exhaust passage, 17... Reflux device, 30... Control device, 3
2... Piston (control valve).

Claims

[Scope of utility model registration request]

The boost pressure from the turbocharger is introduced into the engine via the throttle valve.The blow-by control valve, which operates according to the manifold pressure in the intake manifold, allows the blow-by return to the intake manifold through one blow-by return passage or to the other blow-by return. A blow-by gas reducing device that returns blow-by gas from a crankcase of an engine to an intake passage upstream of a compressor housing of a supercharger via a passage, the blow-by gas reducing device being connected to the engine via the turbine housing of the supercharger. a recirculation device that is disposed in the exhaust passage and generates negative pressure using an ejector effect to recirculate blowby gas from the other blowby recirculation passage into the exhaust passage; A blow-by gas reducing device comprising: a control device that operates and controls the reflux device so that when the pressure exceeds the pressure, the control valve is actuated by this pressure to reflux the blow-by gas.