JPS59135367U

JPS59135367U - Diesel engine blow-by gas recirculation device

Info

Publication number: JPS59135367U
Application number: JP2968483U
Authority: JP
Inventors: 英生望月; 清則長門
Original assignee: マツダ株式会社
Priority date: 1983-03-01
Filing date: 1983-03-01
Publication date: 1984-09-10

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

第１図は本考案の１実施例を概略的に示す系統図、第２
図は本考案の他の実施例の一部を示す概略図である。 ′１・・・ディーゼルエンジン、３・・・吸気通路、６
・・・ターボ過給機、？、１９．２６・・・アクチュエ
ータ、８・・・吸気絞弁、１８・・・排気還流通路、２
０・・・排気還流弁、２２・・・第１ブローバイガス還
流通路、２３・・・ブローバイガス還流弁、２５，１２
５・・・第２ブローバイガス還流通路、２７・・・負圧
導入管、　　　　　′２８・・・３方弁、２９・・・真
空ポンプ、３０・・・制御回路、３１・・・回転数セン
サ、３２・・・負荷センサ。Fig. 1 is a system diagram schematically showing one embodiment of the present invention;
The figure is a schematic diagram showing a part of another embodiment of the present invention. '1...Diesel engine, 3...Intake passage, 6
...Turbo supercharger? , 19.26... Actuator, 8... Intake throttle valve, 18... Exhaust recirculation passage, 2
0... Exhaust gas recirculation valve, 22... First blowby gas recirculation passage, 23... Blowby gas recirculation valve, 25, 12
5... Second blow-by gas recirculation passage, 27... Negative pressure introduction pipe, '28... Three-way valve, 29... Vacuum pump, 30... Control circuit, 31... Rotation speed sensor , 32...Load sensor.

Claims

[Scope of utility model registration request]

(1) A diesel engine with a configuration in which an intake throttle valve is provided in the intake passage downstream of the turbocharger, an exhaust gas recirculation passage is opened in the intake passage downstream of the intake throttle valve, and the intake throttle valve is closed to a predetermined opening during exhaust gas recirculation. In the engine, a first blowby gas recirculation passage that recirculates engine blowby gas to the intake passage upstream of the supercharger, a second blowby gas recirculation passage that recirculates the blowby gas of the engine to the intake passage downstream of the intake throttle valve;
A blowby gas recirculation valve is provided to control the opening and closing of the second blowby gas recirculation passage, and the second blowby gas recirculation passage is opened in the exhaust gas recirculation region and the first blowby gas recirculation passage is closed, and the first blowby gas recirculation is performed outside the exhaust gas recirculation region. A blowby gas recirculation device for a diesel engine, comprising a blowby gas recirculation valve driving device for driving the blowby gas recirculation valve to open a passage and close a second blowby gas recirculation passage.

(2) Registration of a utility model characterized in that the second blow-by gas recirculation passage is opened to the intake manifold near the intake port, and - the exhaust gas recirculation passage is opened to the intake passage on the upstream side of the intake manifold. A blow-by gas recirculation device for a diesel engine according to claim 1.

(3) The blow-by gas of the diesel engine according to claim 1, wherein the second blow-by gas recirculation passage and the exhaust gas recirculation passage are each opened to separate intake manifold branch pipes. Reflux device.