JPS6418969U - - Google Patents
Info
- Publication number
- JPS6418969U JPS6418969U JP11420087U JP11420087U JPS6418969U JP S6418969 U JPS6418969 U JP S6418969U JP 11420087 U JP11420087 U JP 11420087U JP 11420087 U JP11420087 U JP 11420087U JP S6418969 U JPS6418969 U JP S6418969U
- Authority
- JP
- Japan
- Prior art keywords
- check valve
- engine
- backflow prevention
- prevention device
- vacuum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002265 prevention Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Valves And Accessory Devices For Braking Systems (AREA)
- Details Of Valves (AREA)
Description
第１〜３図は本考案に係る逆流防止装置の一実
施例を示す図であり、第１図はその全体概念図、
第２図はその要部拡大断面図、第３図はその作用
を示すグラフである。第４〜６図は従来の逆流防
止装置を示す図であり、第４図はその全体概念図
、第５図はその他の例の全体概念図、第６図はそ
の作用を示すグラフである。
１１……逆流防止装置、１１Ａ……逆流防止弁
、１１Ｂ……逆止弁、１２……エンジン、１３…
…バキユームブースタ、１５……バキユームホー
ス、１９……ハウジング、２０……弁体、２１…
…スプリング、２２……気体流路、２４……オリ
フイス。
1 to 3 are diagrams showing one embodiment of the backflow prevention device according to the present invention, and FIG. 1 is an overall conceptual diagram thereof;
FIG. 2 is an enlarged sectional view of the main part thereof, and FIG. 3 is a graph showing its effect. 4 to 6 are diagrams showing a conventional backflow prevention device. FIG. 4 is an overall conceptual diagram of the device, FIG. 5 is an overall conceptual diagram of another example, and FIG. 6 is a graph showing its operation. 11... Backflow prevention device, 11A... Backflow prevention valve, 11B... Check valve, 12... Engine, 13...
... Vacuum booster, 15... Vacuum hose, 19... Housing, 20... Valve body, 21...
... Spring, 22 ... Gas flow path, 24 ... Orifice.
Claims (1)
れエンジンからバキユームブースタにバキユーム
ホースを通して与えた負圧がエンジンに逆流する
のを逆流防止弁により防止する逆流防止装置にお
いて、前記逆流防止弁とエンジンとの間のバキユ
ームホースに逆止弁を設けるとともに逆止弁と並
列に前記逆流防止弁とエンジンとの間を連通する
オリフイスを設け、逆止弁の閉弁圧を逆流防止弁
の閉弁圧より高くしたことを特徴とする逆流防止
装置。 In a backflow prevention device that is provided between an engine and a vacuum booster and prevents negative pressure applied from the engine to the vacuum booster through a vacuum hose from flowing back into the engine, the check valve is provided between the backflow prevention valve and the engine. A check valve is provided on the vacuum hose, and an orifice is provided in parallel with the check valve to communicate between the check valve and the engine, so that the closing pressure of the check valve is higher than the closing pressure of the check valve. A backflow prevention device featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987114200U JP2576677Y2 (en) | 1987-07-24 | 1987-07-24 | Backflow prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987114200U JP2576677Y2 (en) | 1987-07-24 | 1987-07-24 | Backflow prevention device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6418969U true JPS6418969U (en) | 1989-01-31 |
| JP2576677Y2 JP2576677Y2 (en) | 1998-07-16 |
Family
ID=31354732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987114200U Expired - Lifetime JP2576677Y2 (en) | 1987-07-24 | 1987-07-24 | Backflow prevention device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2576677Y2 (en) |
-
1987
- 1987-07-24 JP JP1987114200U patent/JP2576677Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2576677Y2 (en) | 1998-07-16 |
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