CN201109426Y - Vacuum enhancement one-way valve - Google Patents
Vacuum enhancement one-way valve Download PDFInfo
- Publication number
- CN201109426Y CN201109426Y CNU2007201988324U CN200720198832U CN201109426Y CN 201109426 Y CN201109426 Y CN 201109426Y CN U2007201988324 U CNU2007201988324 U CN U2007201988324U CN 200720198832 U CN200720198832 U CN 200720198832U CN 201109426 Y CN201109426 Y CN 201109426Y
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- Prior art keywords
- venturi tube
- vacuum
- check valve
- chamber
- double
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- Expired - Lifetime
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- Valves And Accessory Devices For Braking Systems (AREA)
- Check Valves (AREA)
Abstract
The utility model discloses a vacuum enhancement type one-way valve, comprising a double venturi tube structure, a first chamber and a second chamber. The double venturi tube structure is formed via the connection of a first venturi tube and a second venturi tube, wherein, the first venturi tube is connected with a filter element to extract air, the second venturi tube is connected with the inlet of a vacuum source; a first chamber is connected with the double venturi tube structure via a first conduit, the first chamber is connected with a vacuum booster via a first one-way valve, the first one-way valve can only be unilaterally opened from the vacuum booster to the first chamber; the second chamber is connected with the double venturi tube structure via a second conduit, the second chamber is connected with the vacuum booster via a second one-way valve, the second one-way valve can only be unilaterally opened from the vacuum booster to the second chamber. The technical proposal of the utility model makes full use of the characteristics of the venturi tube; the double venturi tube structure effectively improves the vacuum degree of extraction and reinforces the braking performance.
Description
Technical field
The utility model relates to the automobile brake parts, more particularly, relates to the check valve of vacuum booster.
Background technology
Vacuum booster is an important component part in the automobile brake parts, and vacuum booster produces vacuum, implements the action of braking with the auxiliary braking parts.The degree of vacuum that vacuum booster can produce has direct influence for braking performance of automobile, and degree of vacuum is high more, and deceleration and stopping performance is good more.
In the conventional art, vacuum booster is connected to vacuum source by a check valve, such as the driving engine of automobile, utilizes vacuum source to produce zone of negative pressure in a side of check valve, utilizes the difference of pressure of check valve both sides to open check valve, the air in the extracting vacuum servo-unit.A shortcoming of this kind implementation is that efficient is not good, depends merely on the extraction that check valve carries out vacuum and can't reach higher degree of vacuum.Reach higher degree of vacuum if desired, need to strengthen vacuum source, the power of driving engine just, this obviously is uneconomic.
The utility model content
The utility model aims to provide a kind of check valve of later-model vacuum booster, utilizes Venturi tube to improve the degree of vacuum that extracts.
According to the utility model, a kind of vacuum enhancement mode check valve is provided, comprising: by the double venturi structure that first Venturi tube and second Venturi tube are interconnected to form, wherein first Venturi tube connects filter core with extracting air, and second Venturi tube connects the inlet of vacuum source; First chamber is connected to described double venturi structure by first conduit, and this first chamber also connects vacuum booster by first check valve, and this first check valve can only be according to the unidirectional unlatching of direction from described vacuum booster to described first chamber; Second chamber is connected to described double venturi structure by second conduit, and this second chamber also connects described vacuum booster by second check valve, and this second check valve can only be according to the unidirectional unlatching of direction from described vacuum booster to described second chamber.
The narrow end of described first Venturi tube and second Venturi tube is connected to each other, and the wide end of first Venturi tube connects filter core, and the wide end of second Venturi tube connects vacuum source.The narrow end diameter of described second Venturi tube is greater than the narrow end diameter of described first Venturi tube.
Described first conduit is connected the junction of described first Venturi tube and second Venturi tube, and second conduit connects described second Venturi tube.
Described vacuum source is an automotive engine.
Described first check valve and second check valve are made of spring and sheet rubber.
Adopt the technical solution of the utility model, made full use of the characteristic of Venturi tube, especially proposed a kind of double venturi structure, improved the degree of vacuum that extracts effectively, strengthened the performance of braking.
Description of drawings
The above and other feature of the present utility model, character and advantage will become more obvious by the description below in conjunction with drawings and Examples, in the accompanying drawings, identical Reference numeral is represented identical feature all the time, wherein:
Fig. 1 is the schematic diagram of check valve of the present utility model;
Fig. 2 is the constructional drawing of check valve of the present utility model;
Fig. 3 is the double venturi structure in the check valve of the present utility model.
The specific embodiment
At first with reference to figure 1, it shows the schematic diagram of vacuum enhancement mode check valve 100 of the present utility model, and this check valve 100 comprises:
By the double venturi structure 102 that first Venturi tube and second Venturi tube are interconnected to form, the two ends of double venturi structure 102 connect filter core 104 and vacuum source 106 respectively.Vacuum source 106 can be automotive engine or other vacuum source.One termination vacuum source 106 of double venturi structure 102, the other end is used for extracting air, and the existence of filter core 104 makes this double venturi structure 102 directly to link to each other with the air in the external world, and needn't be connected to special filtering installation;
With reference to figure 2, the constructional drawing that it shows vacuum enhancement mode check valve 100 of the present utility model comprises following concrete structure:
By the double venturi structure 102 that the first Venturi tube 101a and the second Venturi tube 101b are interconnected to form, wherein the first Venturi tube 101a connects filter core 104 with extracting air, and the second Venturi tube 101b connects the inlet of vacuum source 106.According to an embodiment, the narrow end of the first Venturi tube 101a and the second Venturi tube 101b is connected to each other, and the wide end that the wide end of first Venturi tube 101 connects filter core 104, the second Venturi tube 101b connects vacuum source 106.And the narrow end diameter D2 of the second Venturi tube 101b specifically can be with reference to shown in Figure 3 greater than the narrow end diameter D1 of the first Venturi tube 101a.
Second chamber 109, by the double venturi structure 102 that the second conduit 109a is connected to, according to an embodiment, the second conduit 109a connects the second Venturi tube 101b, specifically can be with reference to shown in Figure 3.This second chamber 109 also connects vacuum booster 112 by second check valve 110, similar with first check valve, this second check valve 110 is made of spring 110a and sheet rubber 110b, spring 110a is fixed on the sidewall of double venturi structure 102, sheet rubber 110b withstands the inlet of vacuum booster 112, makes that second check valve 110 can only be according to the unidirectional unlatching of direction from vacuum booster 112 to second chambeies 109.
The principle of work of this check valve is as follows: when the wide end of vacuum source 106 at the second Venturi tube 101b, when being labeled as A generation vacuum, because the existence of difference of pressure, first check valve 108 and second check valve 110 are opened with the air in the extracting vacuum power-assisted pipe 112, by the wide end of the first Venturi tube 101a, be labeled as B and filter core 104 extracting airs simultaneously.When the pressure among the wide end A of the second Venturi tube 101b was greater than or equal to pressure in the vacuum servo pipe 112, second check valve 110 was closed.
At this moment, because the characteristic of Venturi tube: when having fluid to flow between the wide end B of the wide end A of the second Venturi tube 101b and the first Venturi tube 101a, the pressure of the wide end A of the pressure ratio second Venturi tube 101b in first chamber 107 is low.So the pressure in first chamber 107 still is lower than the pressure in the vacuum servo pipe 112, first check valve 108 is still opened, and continues air in the extracting vacuum power-assisted pipe 112, makes that the degree of vacuum in the vacuum booster is further improved.
Comprehensive, adopt the technical solution of the utility model, made full use of the characteristic of Venturi tube, a kind of double venturi structure has especially been proposed, improved the degree of vacuum that extracts effectively, strengthened the performance of braking.
The foregoing description provides to being familiar with the person in the art and realizes or use of the present utility model; those skilled in the art can be under the situation that does not break away from utility model thought of the present utility model; the foregoing description is made various modifications or variation; thereby protection domain of the present utility model do not limit by the foregoing description, and should be the maximum range that meets the inventive features that claims mention.
Claims (6)
1. a vacuum enhancement mode check valve is characterized in that, comprising:
By the double venturi structure that first Venturi tube and second Venturi tube are interconnected to form, wherein first Venturi tube connects filter core with extracting air, and second Venturi tube connects the inlet of vacuum source;
First chamber is connected to described double venturi structure by first conduit, and this first chamber also connects vacuum booster by first check valve, and this first check valve can only be according to the unidirectional unlatching of direction from described vacuum booster to described first chamber;
Second chamber is connected to described double venturi structure by second conduit, and this second chamber also connects described vacuum booster by second check valve, and this second check valve can only be according to the unidirectional unlatching of direction from described vacuum booster to described second chamber.
2. vacuum enhancement mode check valve as claimed in claim 1 is characterized in that the narrow end of described first Venturi tube and second Venturi tube is connected to each other, and the wide end of first Venturi tube connects filter core, and the wide end of second Venturi tube connects vacuum source.
3. vacuum enhancement mode check valve as claimed in claim 2 is characterized in that, the narrow end diameter of described second Venturi tube is greater than the narrow end diameter of described first Venturi tube.
4. vacuum enhancement mode check valve as claimed in claim 2 is characterized in that described first conduit is connected the junction of described first Venturi tube and second Venturi tube, and second conduit connects described second Venturi tube.
5. vacuum enhancement mode check valve as claimed in claim 1 is characterized in that described vacuum source is an automotive engine.
6. vacuum enhancement mode check valve as claimed in claim 1 is characterized in that described first check valve and second check valve are made of spring and sheet rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201988324U CN201109426Y (en) | 2007-12-04 | 2007-12-04 | Vacuum enhancement one-way valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201988324U CN201109426Y (en) | 2007-12-04 | 2007-12-04 | Vacuum enhancement one-way valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201109426Y true CN201109426Y (en) | 2008-09-03 |
Family
ID=39893951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201988324U Expired - Lifetime CN201109426Y (en) | 2007-12-04 | 2007-12-04 | Vacuum enhancement one-way valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201109426Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407441A (en) * | 2013-08-16 | 2013-11-27 | 河北亚大汽车塑料制品有限公司 | Venturi valve and vacuum power assisting device |
| CN105408177A (en) * | 2014-07-10 | 2016-03-16 | 戴科知识产权控股有限责任公司 | Dual venturi device |
| US9828953B2 (en) | 2014-12-01 | 2017-11-28 | Dayco Ip Holdings, Llc | Evacuator system having multi-port evacuator |
| US10100720B2 (en) | 2015-01-09 | 2018-10-16 | Dayco Ip Holdings, Llc | Crankcase ventilating evacuator |
| US10151283B2 (en) | 2015-02-25 | 2018-12-11 | Dayco Ip Holdings, Llc | Evacuator with motive fin |
| US10273978B2 (en) | 2014-08-27 | 2019-04-30 | Dayco IP, Holdings LLC | Low-cost evacuator for an engine having tuned Venturi gaps |
| US10316864B2 (en) | 2015-04-13 | 2019-06-11 | Dayco Ip Holdings, Llc | Devices for producing vacuum using the venturi effect |
-
2007
- 2007-12-04 CN CNU2007201988324U patent/CN201109426Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103407441A (en) * | 2013-08-16 | 2013-11-27 | 河北亚大汽车塑料制品有限公司 | Venturi valve and vacuum power assisting device |
| CN105408177A (en) * | 2014-07-10 | 2016-03-16 | 戴科知识产权控股有限责任公司 | Dual venturi device |
| CN105408177B (en) * | 2014-07-10 | 2018-02-13 | 戴科知识产权控股有限责任公司 | double-venturi device |
| US10626888B2 (en) | 2014-07-10 | 2020-04-21 | Dayco Ip Holdings, Llc | Dual Venturi device |
| US10273978B2 (en) | 2014-08-27 | 2019-04-30 | Dayco IP, Holdings LLC | Low-cost evacuator for an engine having tuned Venturi gaps |
| US9828953B2 (en) | 2014-12-01 | 2017-11-28 | Dayco Ip Holdings, Llc | Evacuator system having multi-port evacuator |
| US10100720B2 (en) | 2015-01-09 | 2018-10-16 | Dayco Ip Holdings, Llc | Crankcase ventilating evacuator |
| US10151283B2 (en) | 2015-02-25 | 2018-12-11 | Dayco Ip Holdings, Llc | Evacuator with motive fin |
| US10316864B2 (en) | 2015-04-13 | 2019-06-11 | Dayco Ip Holdings, Llc | Devices for producing vacuum using the venturi effect |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080903 |