CN202255887U - Pressure control device for exhaust pipe of entire vehicle - Google Patents
Pressure control device for exhaust pipe of entire vehicle Download PDFInfo
- Publication number
- CN202255887U CN202255887U CN2011203267660U CN201120326766U CN202255887U CN 202255887 U CN202255887 U CN 202255887U CN 2011203267660 U CN2011203267660 U CN 2011203267660U CN 201120326766 U CN201120326766 U CN 201120326766U CN 202255887 U CN202255887 U CN 202255887U
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- control device
- frequency conversion
- exhaust
- pressure control
- pressure
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Abstract
The utility model belongs to the technical field of motor test equipment, and especially relates to a pressure control device for the exhaust pipe of an entire vehicle, which allows the exhaust pipe of a vehicle to stay in a non-backpressure or micro-negative-pressure state. The control device comprises a frequency conversion blower fan that is connected with the exhaust pipe of an automobile via an air inlet branch pipe. An exhaust branch pipe is connected on the frequency conversion blower fan. A pressure sensor is disposed in the air inlet branch pipe. The pressure control device also comprises a controller which is electrically connected with the pressure sensor and the frequency conversion blower fan respectively via a line. The beneficial effects of the utility model are that the pressure control device is of a simple structure, enables the exhaust pipe to stay in a non-backpressure or micro-negative-pressure state, and enables the dynamic performance of an engine and the accuracy of discharge performance test data not to be affected.
Description
Technical field
The utility model belongs to the engine test facility technical field, especially relates to a kind ofly being used to make blast duct for vehicle to reach the car load gas outlet pressure control device of no back pressure or micro-vacuum state.
Background technology
Exhaust back pressure is the pressure behind the gas outlet, and exhaust back pressure all has material impact to dynamic property, economy and the emission behavior of engine, and the back pressure increase can cause the motor fuel burning efficiency to descend, the economy variation, and dynamic property descends simultaneously, discharges also variation.
Discharge pressure is the key factor that influences the engine performance index; In the test of vehicle power property, the detection of discharge pressure and control there are strict requirement, exhaust back pressure is bigger to the performance impact of engine; Exhaust back pressure is crossed conference makes engine capacity reduce by 3%～5%; Thereby when doing engine performance test and emission testing in the laboratory, must control accurately and detect discharge pressure, guarantee the accuracy of engine power performance and emission behavior.
Existing a kind of gas outlet pressure-detecting device; Like notification number be: the online testing agency of a kind of engine back pressure that the Chinese utility model of CN201716190U provides; Comprise the mobile platform under the air cylinder driven, mobile platform is provided with and is used for the mounting blocks of connected sum location exhaust block head and back pressure transducer; The exhaust block head is connected with back pressure transducer set middle through hole, passage in mounting blocks, and middle through hole, passage also are connected with pneumatic ball valve through a ball valve web member; Exhaust block head head is provided with and is used for the exhausr port or the exhaust passage that connect with the measured workpiece exhausr port, and wherein said pneumatic ball valve one end connects said back pressure transducer, and the other end can link to each other with a sound suppressor.This patent just detects the exhaust back pressure at automobile exhaust pipe place through pressure transducer; Can not reduce or eliminate exhaust back pressure; When doing engine performance test and emission testing in the laboratory; Exhaust back pressure still can influence test data, and engine power performance and emission behavior test data can not accurately reflect.
The utility model content
The utility model mainly is that the gas outlet pressure-detecting device is existing can not to reduce or eliminate exhaust back pressure to having now; The problem that exhaust back pressure still can impact the power performance and the emission behavior test data of motivation; Provide a kind of simple in structure; Can make gas outlet reach no back pressure or micro-vacuum state, can not influence the car load gas outlet pressure control device of engine power performance and the accuracy of emission behavior test data.
The above-mentioned technical matters of the utility model mainly is able to solve through following technical proposals: a kind of car load gas outlet pressure control device; It comprises the frequency conversion fan that is connected with automobile exhaust pipe through air intake branch; Be connected with exhaust branch pipe on the frequency conversion fan; Be provided with pressure transducer in the air intake branch, this pressure control device also comprises controller, and controller is electrically connected with pressure transducer and frequency conversion fan respectively through circuit.Pressure transducer is used to detect the tail gas air pressure at automobile exhaust pipe mouth place; Controller is used to receive the pressure data signal of being carried by pressure transducer; Frequency conversion fan is for adopting frequency conversion control technique, through changing the blower fan that the blower fan frequency of input voltage changes rotation speed of fan.Controller receives data-signal immediately; And change according to the rotating speed of this data-signal control of conversion blower fan; Frequency conversion fan is constantly discharged with the tail gas sucking-off in the automobile exhaust pipe and through exhaust branch pipe, reduces the tail gas pressure in the gas outlet, makes vehicle exhaust pressure reach no back pressure or micro-vacuum state; When vehicle is done engine performance test and emission testing in the laboratory, can not influence the accuracy of engine performance measuring.
As preferably, described frequency conversion fan is the centrifugal blower or the axial flow blower of variable ratio frequency changer control.Frequency conversion fan adopts frequency conversion control technique, and centrifugal blower and axial flow blower all can use.
As preferably, described air intake branch is a stepped appearance.The density of vehicle exhaust is less than atmospheric gas pressure, and the part that is connected with blower fan on the air intake branch should be higher than the part that is connected with gas outlet, and the tail gas that step-like like this air intake branch more helps in the gas outlet is inhaled into blower fan, and is air-breathing more smooth and easy.
As preferably, the caliber of described exhaust branch pipe increases along discharge directions gradually.The caliber of exhaust branch pipe increases along discharge directions gradually, and the tail gas that frequency conversion fan sucks is discharged through exhaust branch pipe more easily, and exhaust is more smooth and easy.
As preferably, an end of described exhaust branch pipe is connected with frequency conversion fan, and the other end of exhaust branch pipe upwards stretches, and exhaust branch pipe is L-shaped.The density of vehicle exhaust is less than atmospheric gas pressure, and the end of " L " shape exhaust branch pipe upwards stretches, and tail gas is discharged through exhaust branch pipe more easily, and exhaust is more smooth and easy.
Therefore, the beneficial effect of the utility model is: simple in structure, and can make gas outlet reach no back pressure or micro-vacuum state, can not influence the accuracy of engine power performance and emission behavior test data.
Description of drawings
Accompanying drawing 1 is a kind of structural representation of the utility model.
Shown in the figure: 1-air intake branch, 2-automobile exhaust pipe, 3-frequency conversion fan, 4-exhaust branch pipe, 5-pressure transducer, 6-controller, 7-air intake opening, 8-exhausr port.
Embodiment
Pass through embodiment below, and combine accompanying drawing, do further bright specifically the technical scheme of the utility model.
Embodiment:
Shown in Figure of description 1, a kind of car load gas outlet pressure control device, it comprises the frequency conversion fan 3 that is connected with automobile exhaust pipe 2 through air intake branch 1; One end of air intake branch 1 is connected with the air intake opening 7 of frequency conversion fan 3; The other end is connected with automobile exhaust pipe 2, and air intake branch 1 is a stepped appearance, and the part that is connected with frequency conversion fan 3 on the air intake branch 1 is higher than the part that is connected with automobile exhaust pipe 2; Frequency conversion fan 3 is the centrifugal blower of variable ratio frequency changer control; The exhausr port 8 of frequency conversion fan 3 is connected with exhaust branch pipe 4, and the caliber of exhaust branch pipe 4 increases along discharge directions gradually, and exhaust branch pipe 4 is L-shaped; The end of exhaust branch pipe 4 stretches straight up; Position near automobile exhaust pipe 2 in the air intake branch 1 is provided with the pressure transducer 5 that is used to detect automobile exhaust pipe 2 pressure, and air intake branch 1 is provided with controller 6, and controller 6 is electrically connected with pressure transducer 5 and frequency conversion fan 3 respectively through circuit.
After vehicle exhaust gets into air intake branch 1 from automobile exhaust pipe 2; Pressure transducer 5 detects discharge pressure this moment; And will detect data and flow to controller 6 immediately, controller 6 will reach the purpose of control of conversion blower fan 3 rotating speeds according to data-signal control of conversion blower fan 3 frequency of input voltage; Frequency conversion fan 3 will constantly be discharged with the tail gas sucking-off in the automobile exhaust pipe 2 and through exhaust branch pipe 4, reduce the tail gas pressure in the automobile exhaust pipe 2.
This device principle of work is following: when automobile exhaust pipe 2 inner exhaust gas concentration are low; Pressure transducer 5 detected tail gas low pressure values are also carried data-signal; Controller 6 receives signal and reduces frequency conversion fan 3 frequency of input voltage; Frequency conversion fan 3 rotating speeds reduce automatically, and automobile exhaust pipe 2 tail gas back pressures are little, can not influence the test of engine power performance and exhaust performance; When automobile exhaust pipe 2 inner exhaust gas concentration are high; Pressure transducer 5 detected tail gas high pressure values are also carried data-signal; Controller 6 receives signal and increases frequency conversion fan 3 frequency of input voltage, and frequency conversion fan 3 rotating speeds increase automatically, constantly the tail gas in the automobile exhaust pipe 2 is discharged; Automobile exhaust pipe 2 tail gas back pressures are little like this, also can not influence the test of engine power performance and exhaust performance; The rotating speed of this frequency conversion fan 3 changes with the variation of exhaust pressure value all the time; Can stablize the control discharge pressure; Make automobile exhaust pipe 2 reach no back pressure or micro-vacuum state, make discharge pressure can not influence the accuracy of engine power performance and emission behavior test data.
Should be understood that this embodiment only to be used to the utility model is described and be not used in the restriction the utility model scope.Should be understood that in addition those skilled in the art can do various changes or modification to the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (5)
1. car load gas outlet pressure control device; It is characterized in that; It comprises the frequency conversion fan (3) that is connected with automobile exhaust pipe (2) through air intake branch (1), is connected with exhaust branch pipe (4) on the frequency conversion fan (3), is provided with pressure transducer (5) in the air intake branch (1); This pressure control device also comprises controller (6), and controller (6) is electrically connected with pressure transducer (5) and frequency conversion fan (3) respectively through circuit.
2. a kind of car load gas outlet pressure control device according to claim 1 is characterized in that, described frequency conversion fan (3) is the centrifugal blower or the axial flow blower of variable ratio frequency changer control.
3. a kind of car load gas outlet pressure control device according to claim 1 and 2 is characterized in that described air intake branch (1) is a stepped appearance.
4. a kind of car load gas outlet pressure control device according to claim 1 and 2 is characterized in that the caliber of described exhaust branch pipe (4) increases along discharge directions gradually.
5. a kind of car load gas outlet pressure control device according to claim 4 is characterized in that an end of described exhaust branch pipe (4) is connected with frequency conversion fan (3), and the other end of exhaust branch pipe (4) upwards stretches, and exhaust branch pipe (4) is L-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203267660U CN202255887U (en) | 2011-09-02 | 2011-09-02 | Pressure control device for exhaust pipe of entire vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203267660U CN202255887U (en) | 2011-09-02 | 2011-09-02 | Pressure control device for exhaust pipe of entire vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202255887U true CN202255887U (en) | 2012-05-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203267660U Expired - Fee Related CN202255887U (en) | 2011-09-02 | 2011-09-02 | Pressure control device for exhaust pipe of entire vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202255887U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900759A (en) * | 2014-04-04 | 2014-07-02 | 中国北方发动机研究所(天津) | Burnout preventing device for sampling pipe measuring pressure in the front of turbine of supercharger |
| CN105857155A (en) * | 2016-03-30 | 2016-08-17 | 时建华 | Multi-partition logistics apparatus |
| CN107014619A (en) * | 2017-05-23 | 2017-08-04 | 安徽江淮汽车集团股份有限公司 | A kind of engine emissions testing fexible unit |
| CN109056900A (en) * | 2018-06-28 | 2018-12-21 | 扬州大学 | It is a kind of without driving air water fetching device |
| CN113125160A (en) * | 2019-12-30 | 2021-07-16 | 郑州宇通客车股份有限公司 | New energy vehicle emission detection device, emission test system and emission detection method |
-
2011
- 2011-09-02 CN CN2011203267660U patent/CN202255887U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103900759A (en) * | 2014-04-04 | 2014-07-02 | 中国北方发动机研究所(天津) | Burnout preventing device for sampling pipe measuring pressure in the front of turbine of supercharger |
| CN105857155A (en) * | 2016-03-30 | 2016-08-17 | 时建华 | Multi-partition logistics apparatus |
| CN107014619A (en) * | 2017-05-23 | 2017-08-04 | 安徽江淮汽车集团股份有限公司 | A kind of engine emissions testing fexible unit |
| CN109056900A (en) * | 2018-06-28 | 2018-12-21 | 扬州大学 | It is a kind of without driving air water fetching device |
| CN113125160A (en) * | 2019-12-30 | 2021-07-16 | 郑州宇通客车股份有限公司 | New energy vehicle emission detection device, emission test system and emission detection method |
| CN113125160B (en) * | 2019-12-30 | 2023-08-18 | 宇通客车股份有限公司 | New energy vehicle emission detection device, emission test system and emission detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20130902 |