JPH0476945U

JPH0476945U -

Info

Publication number: JPH0476945U
Application number: JP11946690U
Authority: JP
Priority date: 1990-11-15
Filing date: 1990-11-15
Publication date: 1992-07-06
Anticipated expiration: 2005-11-15
Also published as: JP2522385Y2

Description

[Brief explanation of drawings]

第１図は本考案の絞り弁閉弁遅延装置の実施例
を示す断面図、第２図はダツシポツトと逆止弁付
オリフイスアセンブリとが別体に形成された絞り
弁閉弁遅延装置の従来の構成例を示す図、第３図
はダツシユポツトと逆止弁付オリフイスアセンブ
リとが一体に形成された特公昭６３−１１５４３
号開示の構成を示す図である。１……作動桿、２……ダイアフラム、３……第
１の筺体、３−１……鍔部、４……第１の圧力室
、５……スプリング、６……第２の筺体、６−１
……案内筒、７……第１の大気圧室、８……第３
の筺体、８−１……隔壁体、９……第１のエアフ
イルタ、１０……第２の圧力室、１１……第２の
エアフイルタ、１２……第２の大気圧室、１３…
…オリフイス、１３−１……オリフイス体、１４
……逆止弁、１５……透孔、１６……蓋体、１７
，１８……超音波溶着部、１９……段付部、２０
……ダストシール、１０１……ダツシユポツト、
１０２……逆止弁付オリフイスアセンブリ。 FIG. 1 is a sectional view showing an embodiment of the throttle valve closing delay device of the present invention, and FIG. 2 is a cross-sectional view showing a conventional throttle valve closing delay device in which a dart pot and an orifice assembly with a check valve are formed separately. A diagram showing an example of the configuration, Figure 3 is a Japanese Patent Publication No. 63-11543 in which a dart pot and an orifice assembly with a check valve are integrally formed.
It is a diagram showing the configuration of the No. No. disclosure. DESCRIPTION OF SYMBOLS 1... Actuation rod, 2... Diaphragm, 3... First housing, 3-1... Flange, 4... First pressure chamber, 5... Spring, 6... Second housing, 6 -1
... Guide cylinder, 7 ... First atmospheric pressure chamber, 8 ... Third
casing, 8-1... partition body, 9... first air filter, 10... second pressure chamber, 11... second air filter, 12... second atmospheric pressure chamber, 13...
... Orifice body, 13-1 ... Orifice body, 14
... Check valve, 15 ... Through hole, 16 ... Lid body, 17
, 18... Ultrasonic welding part, 19... Stepped part, 20
...Dust seal, 101...Dasshu pot,
102... Orifice assembly with check valve.

Claims

[Claim for Utility Model Registration] Throttle valve closing delay for gently closing a throttle valve located in the intake passage of an engine and biased in the closing direction by a return spring in a small opening range. The device includes a rotating lever 1 that rotates together with the throttle valve via a rotation shaft of the throttle valve.
06 is an operating rod 1 that comes into contact with one end of the throttle valve when the opening is small; a diaphragm 2 fixed to the other end of the operating rod 1; and a side of the diaphragm 2 opposite to the operating rod 1. , a first pressure chamber 4 formed of synthetic resin forming a first pressure chamber 4 whose pressure increases due to contact between the rotary lever 106 and the operating rod 1;
a casing 3, a spring 5 disposed within the first pressure chamber 4 and urging the diaphragm 2 in a direction to expand the volume of the first pressure chamber 4, and a flange portion of the first casing 3. 3-1 clamps the peripheral edge of the diaphragm 2 and fixes it by caulking to form a guide tube 6-1 for the actuating rod 1, and a first atmospheric pressure connected to the atmosphere is provided between the diaphragm 2 and the diaphragm 2. A second housing 6 formed by press molding of a metal plate forming the chamber 7
a second pressure chamber 10 that communicates with the first pressure chamber 4 via a first air filter 9 and a second pressure chamber 10 that communicates with the atmosphere via a second air filter 11 and is opposite to the dart pot 101; An orifice 13 is formed to partition the second atmospheric pressure chamber 12 formed on the side and to restrict the flow rate of air flowing from the second pressure chamber 10 to the second atmospheric pressure chamber 12. A synthetic resin-molded partition body 8-1 having a through hole 15 with a check valve 14 that opens from the second atmospheric pressure chamber 12 to the second pressure chamber 10 3 housing 8 and the second atmospheric pressure chamber 12
The first housing 3 and the third housing 8 sandwich the periphery of the first air filter 9. The third housing 8 and the lid 16 are ultrasonically welded to each other.
A throttle valve closing delay device is formed by integrally forming a doss pot 101 and an orifice assembly 102 with a check valve by ultrasonically welding the periphery of an air filter 11 between them.