JPS5879059U

JPS5879059U - EGR device

Info

Publication number: JPS5879059U
Application number: JP17395281U
Authority: JP
Inventors: 嘉人守谷
Original assignee: Toyota Motor Corp
Current assignee: Toyota Motor Corp
Priority date: 1981-11-21
Filing date: 1981-11-21
Publication date: 1983-05-28

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]

図面は本考案の一実施例を示す作動系統図である。１・・・インテーク通路、２・・・スロットル弁、３・
・・アドバンスポート、４・・・ＥＧＲポート、５・・
・ＥＧＲ通路、６・・・ＥＧＲ制御弁、７・・・負圧室
、８・・・ＥＧＲ負圧通路、９・・・定圧室モジュレー
タ、１４・・・定圧室、１５・・・大気通路、１６・・
・負圧制御弁。補正　昭５６．１２．２４実用新案登録請求の範囲を次のように補正する。Ｏ実用新案登録請求の範囲ＥＧＲ通路の途中に定圧室を備えるＥＧＲ制御弁を設け
たＥＧＲ装置において、スロットル弁近傍のインテーク通路側壁に、アドバンス
ポートとＥＧＲポートとを開口させ前記ＥＧＲ制御弁の
定圧室は大気通路を介して大気に導通させ、該大気通路
の途中には前記アドパッスボ−１へに生ずる負圧と前記
ＥＧＲポートに生ずる負圧との差圧が一定値を越えたと
きのみ閉弁する負圧制御弁を設けた、ことを特徴とする
ＥＧＲ装置。The drawing is an operational system diagram showing an embodiment of the present invention. 1... Intake passage, 2... Throttle valve, 3...
・・Advanced port, 4・EGR port, 5・・
・EGR passage, 6... EGR control valve, 7... Negative pressure chamber, 8... EGR negative pressure passage, 9... Constant pressure chamber modulator, 14... Constant pressure chamber, 15... Atmospheric passage , 16...
・Negative pressure control valve. Amendment December 24, 1980 The scope of claims for utility model registration is amended as follows. O Utility Model Registration Claim Scope In an EGR system equipped with an EGR control valve having a constant pressure chamber in the middle of an EGR passage, an advance port and an EGR port are opened on the side wall of the intake passage near the throttle valve to control the constant pressure of the EGR control valve. The chamber is communicated with the atmosphere through an atmospheric passage, and a valve is provided in the middle of the atmospheric passage that closes only when the differential pressure between the negative pressure generated in the adpass board 1 and the negative pressure generated in the EGR port exceeds a certain value. An EGR device characterized by being provided with a negative pressure control valve.

Claims

[Scope of Claim for Utility Model Registration] In an EGR system equipped with an EGR control valve with a constant pressure chamber in the middle of the EGR passage, an advance port and an EGR port are installed on the side wall of the intake passage near the throttle valve only in a low load operating range. The advance port is located downstream of the throttle valve, and the EGR port is opened so as to be located upstream of the throttle valve, and the constant pressure chamber of the EGR control valve is communicated with the atmosphere through an atmospheric passage. A negative pressure control valve that closes only when a differential pressure between the negative pressure generated at the advance port and the negative pressure generated at the EGR port exceeds a certain value is provided in the middle of the atmospheric passage. EGR device.