JPS5956328U

JPS5956328U - Flow path control device for helical intake port

Info

Publication number: JPS5956328U
Application number: JP15142182U
Authority: JP
Inventors: 磯谷　精; 古賀　逸夫; 内藤　三千勝; 都築　邦弘; 和夫伊藤
Original assignee: トヨタ自動車株式会社
Priority date: 1982-10-07
Filing date: 1982-10-07
Publication date: 1984-04-12

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 the drawing]

第１図は第２図のＩ−Ｉ線に沿ってみた本考案に係る内
燃機関の側面断面図、第２図は第１図の■−■線に沿っ
てみた平面断面図、第３図は本考案によるヘリカル型吸
気ポートの形状を図解的に示す側面図、第４図はヘリカ
ル型吸気ポートの形状を図解的に示す平面図、第５図は
第３図および第４図の■−■線に沿ってみた断面図、第
６図は第３図および第４図のＶＩ−ＶＩ線に沿ってみた
断面図、第゛７図は第３図および第４図の■−■線に沿
ってみた断面図、第８図は第３図および第４図の■−■
線に沿ってみた断面図、第９図は第３図および第４図の
ＩＸ−ＩＸ線に沿ってみた断面図、第１０図はロータリ
弁の側面断面図、第１１図はロータリ弁の駆動制御装置
を示す図、第１２図は第１１図の負圧制御弁装置の一部
拡大断面図である。４・・・燃焼室、６・・・ヘリカル型吸気ポート、１２
・・・隔壁、２４・・・分岐路、２５・・・ロータリ弁
、４９・・・負圧制御弁装置、６５・・・中空パイプ。Fig. 1 is a side sectional view of the internal combustion engine according to the present invention taken along the line I-I in Fig. 2, Fig. 2 is a plan sectional view taken along the line ■-■ in Fig. 1, and Fig. 3. is a side view schematically showing the shape of the helical intake port according to the present invention, FIG. 4 is a plan view schematically showing the shape of the helical intake port, and FIG. ■A cross-sectional view taken along the line, Figure 6 is a cross-sectional view taken along the VI-VI line in Figures 3 and 4, and Figure 7 is a cross-sectional view taken along the line ■-■ in Figures 3 and 4. A cross-sectional view taken along the line, Figure 8 is from ■-■ in Figures 3 and 4.
9 is a sectional view taken along line IX-IX in FIGS. 3 and 4, FIG. 10 is a side sectional view of the rotary valve, and FIG. 11 is a drive of the rotary valve. FIG. 12 is a partially enlarged sectional view of the negative pressure control valve device shown in FIG. 11, showing the control device. 4... Combustion chamber, 6... Helical intake port, 12
... Partition wall, 24 ... Branch path, 25 ... Rotary valve, 49 ... Negative pressure control valve device, 65 ... Hollow pipe.

Claims

[Scope of utility model registration request]

In a helical intake port configured with a spiral part formed in the intake valve layer and an inlet passage part connected tangentially to the spiral part and extending almost straight, the spiral part is branched from the inlet passage part and connected to the spiral part. A branch passage communicating with the end portion of the spiral is formed in the cylinder head, an on-off valve operated by a negative pressure diaphragm device is inserted into the branch passage, and the negative pressure chamber of the negative pressure diaphragm device is connected to the negative pressure port. The negative pressure port is provided with a check valve that is connected to the intake passage downstream of the carburetor throttle valve through the negative pressure chamber and allows flow only from the negative pressure chamber to the intake passage, and further includes the negative pressure diaphragm device. The negative pressure chamber is communicated with the atmosphere through an atmospheric port, and a negative pressure diaphragm type atmospheric release valve is provided in the atmospheric port, and the diaphragm negative pressure chamber of the atmospheric release valve is connected to the venturi portion of the vaporizer, and the atmospheric port is connected to the atmosphere port. A hollow pipe, which is controlled to open and close by the atmosphere release valve, is fixed in cooperation with the atmosphere release valve, and when the negative pressure in the venturi portion of the carburetor is smaller than a predetermined constant pressure, the air pressure is generated in the intake passage. By accumulating negative pressure in the negative chamber through the check valve, the on-off valve is kept closed, and when the negative pressure in the venturi section of the carburetor is greater than the constant pressure, the negative pressure chamber is closed to the atmosphere. A flow path control device for a helical intake port, in which the on-off valve is opened by venting to the atmosphere through an open valve.