JPS6049208U

JPS6049208U - Internal combustion engine crankcase ventilation flow control valve

Info

Publication number: JPS6049208U
Application number: JP14209383U
Authority: JP
Inventors: 三島　安治郎
Original assignee: 日産自動車株式会社
Priority date: 1983-09-13
Filing date: 1983-09-13
Publication date: 1985-04-06

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図は従来例の断面図、第２図はその還元ガス流量特
性図、第３図Ａは本考案の第１実施例の断面図、第３図
ＢはそのＸ方向矢視図、第４図Ａは同じく本考案の第２
実施例の断面図、第４図ＢはそのＹ方向矢視図である。１・・・クランクケースベンチレーション流量制御弁、
２・・・バルブケース、３・・・コイルスプリング、４
・・・ニードル、４ａ・・・ニードル頭部、５・・・ガ
ス通路、５ａ・・・大径ガス通路、５ｂ・・・小径ガス
通路、７・・・ニードル着座面、８，１０・・・低流量
制御孔、９・・・消音体。Fig. 1 is a sectional view of the conventional example, Fig. 2 is its reducing gas flow rate characteristic diagram, Fig. 3A is a sectional view of the first embodiment of the present invention, Fig. 3B is its X direction arrow view, and Fig. 3A is a sectional view of the first embodiment of the invention. Figure 4 A is also the second figure of this invention.
A sectional view of the embodiment, FIG. 4B is a view taken in the Y direction. 1...Crankcase ventilation flow control valve,
2... Valve case, 3... Coil spring, 4
...Needle, 4a...Needle head, 5...Gas passage, 5a...Large diameter gas passage, 5b...Small diameter gas passage, 7...Needle seating surface, 8, 10... -Low flow control hole, 9...silencer.

Claims

[Scope of utility model registration request]

In the crankcase ventilation flow control valve, which is installed in the middle of the blow-by gas return passage that connects the crankcase and the intake passage of an internal combustion engine, a needle that can freely slide against the passage inside the valve case is provided, and a needle is installed on the intake passage side. A coil spring that biases the needle pulled by suction pressure in the opposite direction is housed in the passage, one end of the spring is connected to the needle head, while the tip of the needle on the opposite side is covered with a muffler, A crankcase for an internal combustion engine, characterized in that a needle seating surface on which the muffler is seated is formed on the inner peripheral wall of the passage, and a low flow rate control hole is provided to allow a predetermined amount of reducing gas to flow when the muffler is seated. Ventilation flow control valve.