CN208705047U - A kind of full flow type tail gas dilution system of twin-engined racks - Google Patents
A kind of full flow type tail gas dilution system of twin-engined racks Download PDFInfo
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- CN208705047U CN208705047U CN201821009957.2U CN201821009957U CN208705047U CN 208705047 U CN208705047 U CN 208705047U CN 201821009957 U CN201821009957 U CN 201821009957U CN 208705047 U CN208705047 U CN 208705047U
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Abstract
The utility model discloses a kind of full flow type tail gas dilution systems of twin-engined racks, including jack horse test bed group, dilution part, analysis portion and control unit；Jack horse test bed group includes the first testing stand and the second testing stand, first testing stand, the second testing stand pass through the first connecting tube respectively and are connected respectively with main exhaust and dilution part, are provided with control valve, heating system and temperature sensor in the first connecting tube and the second connecting tube；Dilution part includes dilution chamber, air hose, mixing tube, air cleaner, venturi mixer and air pump, and the first connecting tube and the second connecting tube penetrate in dilution chamber, and analysis portion is connected with mixing tube, and analysis portion includes gas analyzer and amounts of particles analyzer；Control unit includes electronic control unit and host.The present apparatus realizes two jack horse test bed connections with full flow type dilution system, can toggle rapidly, the urgent state of demand of high degree slowed down to equipment, the utilization efficiency of lifting means.
Description
Technical field
The utility model relates to engine detection equipment fields, and in particular to a kind of full flow type of twin-engined racks
Tail gas dilution system.
Background technique
With the rapid growth of conventional fuel oil car ownership, it is big that the exhaust pollution of conventional fuel oil engine has become the earth
The important sources of gas environmental pollution.Nitrogen oxides and fine particulates discharge especially in engine exhaust, are to cause haze
The major reason of weather and photochemical fog, in consideration of it, various countries have put into effect the regulation of restricting vehicle exhaust emissions in succession, to limit
The discharge amount of harmful substance in tail gas processed.
In existing engine exhaust composition measuring technique: full flow dilution, it may be assumed that CVS
(Constant Volume Sampler), in Europe, the U.S., Japan and China, always all as emission regulation test standard
Sampling method is measured, therefore the discharge detection device of CVS has become the standard configuration of major engine industry.
Under normal conditions, since the equipment of CVS is excessively huge, most of producers are all that CVS is fixedly installed in a certain
Frame, this will to need engine to be tested that must be adapted to according to the torque range of rack dynamometer machine, at the same time,
The time of lower stage and preheating occupied time, it is low to will lead to whole equipment efficiency of usage on the engine.
Summary of the invention
To solve the above-mentioned problems in the prior art, the utility model provides a kind of twin-engined racks
Full flow type tail gas dilution system, which is characterized in that pass through piping connection including jack horse test bed group, with described jack horse test bed group
Dilution part, the analysis portion that is connect with the dilution part and control unit for controlling devices；
Described jack horse test bed group includes the first testing stand and the second testing stand for being each configured with engine dynamometer, institute
It states the first testing stand to be connected with main exhaust and dilution part respectively by the first connecting tube, second testing stand passes through second
Connecting tube is connected with main exhaust and dilution part respectively, is provided with control in first connecting tube and second connecting tube
Valve, heating system and temperature sensor processed；
The dilution part includes having the dilution chamber of hollow structure, and one end of the dilution chamber is provided with air hose, another
End be provided with mixing tube, air cleaner is provided on the air hose, be provided on the mixing tube venturi mixer and
Air pump, first connecting tube and second connecting tube penetrate in the dilution chamber and end be parallel to the air hose and
The mixing tube；
The analysis portion is connected with the mixing tube, and the analysis portion includes gas analyzer and amounts of particles analysis
Instrument；
The control unit includes the electronics control being electrically connected with the control valve, the heating system, the temperature sensor
Unit processed, the electronic control unit are connect with main-machine communication.
Further, the engine of the engine dynamometer of the first testing stand configuration and second testing stand configuration
The measurement range of dynamometer machine is different.
Further, first is provided in first connecting tube between first testing stand and the main exhaust
Control valve is provided with the second control valve in first connecting tube between first testing stand and the dilution part, described
Third control valve, second testing stand are provided in second connecting tube between second testing stand and the main exhaust
The 4th control valve, first control valve, second control are provided in second connecting tube between the dilution part
Valve, the third control valve and the 4th control valve processed are electrically connected with the electronic control unit.
Further, the heating system includes the first heating wire and the second heating wire, and first heating wire is located at institute
On the outer wall for stating first connecting tube between the first testing stand and the dilution part, second heating wire is located at described the
On the outer wall of second connecting tube between two testing stands and the dilution part.
Further, the outer wall of first connecting tube and second connecting tube is coated with heat-isolating flame retardant material, described
First heating wire, second heating wire and the temperature sensor are coated on interior by heat-isolating flame retardant material.
Further, the temperature sensor is separately positioned on the junction of first connecting tube and the dilution chamber
With the junction of second connecting tube and the dilution chamber.
Further, the air pump is arranged in close to the side of the dilution chamber in the venturi mixer.
Further, first heating wire and second heating wire are electrically connected with the electronic control unit.
Further, the temperature sensor is patch type temperature sensor.
Further, the control unit includes host, the host for control the control valve, the heating system,
The temperature sensor.
The utility model has the advantages that
A kind of full flow type tail gas dilution system of twin-engined racks is provided in the embodiments of the present invention, it can
By way of the jack horse test bed shared full flow type dilution system of measurement range two engine dynamometers complimentary to one another, it will manage
Control valve electronic signal in the arrangement and pipeline on road is controlled, and realizes that two two jack horse test bed and full flow type dilutes
The connection of system can toggle rapidly, can use the rank of jack horse test bed installation and removal and different tests project
Connect time, the urgent state of demand of high degree slowed down to equipment, the utilization efficiency of lifting means.
Detailed description of the invention
Fig. 1 is a kind of structure of the embodiment of the full flow type tail gas dilution system of twin-engined racks of the utility model
Schematic diagram；
Fig. 2 is the first of the embodiment of the full flow type tail gas dilution system of a kind of twin-engined racks of the utility model
The partial structure diagram of connecting tube；
Fig. 3 is a kind of dilution of the embodiment of the full flow type tail gas dilution system of twin-engined racks of the utility model
The structural schematic diagram in portion.
Wherein: the first testing stand of 1-；The second testing stand of 2-；The first connecting tube of 3-；The second connecting tube of 4-；5- first is controlled
Valve；The second control valve of 6-；7- third control valve；The 4th control valve of 8-；The first heating wire of 9-；The second heating wire of 10-；11- temperature
Sensor；12- air hose；13- air cleaner；14- dilution chamber；15- mixing tube；16- heat-isolating flame retardant material；17- venturi
Mixer；18- air pump；19- analysis portion；20- host；21- electronic control unit；22- main exhaust.
Specific embodiment
Technical solutions of the utility model are described in detail below.
Embodiment 1
As shown in Figure 1-3, a kind of full flow type tail gas dilution system of twin-engined racks, which is characterized in that including
Jack horse test bed group, with described jack horse test bed group pass through the dilution part of piping connection, the analysis portion connecting with the dilution part
19 and control unit for controlling devices；
Described jack horse test bed group includes the first testing stand 1 and the second testing stand 2 for being each configured with engine dynamometer,
First testing stand 1 is connected with main exhaust 22 and dilution part respectively by the first connecting tube 3, second testing stand 2
It is connected respectively with main exhaust 22 and dilution part by the second connecting tube 4, first connecting tube 3 and second connecting tube
Control valve, heating system and temperature sensor 11 are provided on 4；
The dilution part includes having the dilution chamber 14 of hollow structure, and one end of the dilution chamber 14 is provided with air hose
12, the other end is provided with mixing tube 15, and air cleaner 13 is provided on the air hose 12, is arranged on the mixing tube 15
There are venturi mixer 17 and air pump 18, first connecting tube 3 and second connecting tube 4 penetrate the dilution chamber 14
Interior and end is parallel to the air hose 12 and the mixing tube 15；
The analysis portion 19 is connected with the mixing tube 15, and the analysis portion 19 includes gas analyzer and amounts of particles
Analyzer；
The control unit includes the electronics being electrically connected with the control valve, the heating system, the temperature sensor 11
Control unit 21, the electronic control unit 21 are communicated to connect with host 20.
Further, first testing stand 1 and second testing stand 2 be respectively set power and tachometric survey range that
This complementary engine dynamometer.
Further, described complimentary to one another different for measurement range, and two different measurement ranges add up to always
Bulk measurement range, i.e. two different measurement ranges are complementary within the scope of overall measurement.
Preferably, the first testing stand 1 described in the present embodiment configures measurement range in 6L engine dynamometer below, institute
The second testing stand 2 configuration measurement range is stated in the engine dynamometer of 6L to 13L.
Further, first connecting tube 3 and second connecting tube 4 are vertically penetrated from the side wall of the dilution chamber 14
In the dilution chamber 14, and end turn to after be parallel to the air hose 12 and the mixing tube 15, i.e., with gas in dilution chamber 14
Body flow direction is parallel.
Further, first connecting tube 3 is connected by threeway with the exhaust manifold of first testing stand 1, institute
It states the second connecting tube 4 and is connected by threeway with the exhaust manifold of second testing stand 2.
Further, the quantity of the temperature sensor 11 be two, be separately positioned on first connecting tube 3 with it is described
The junction of the junction of dilution chamber 14 and second connecting tube 4 and the dilution chamber 14.
Further, the gas analyzer and the amounts of particles analyzer are for detecting gas.
Further, first control valve 5, second control valve 6, the third control valve 7, the 4th control
Valve 8, the heating system, the temperature sensor 11 are connected by signal communication cable with the electronic control unit 21.
Further, the dilution part is full flow type dilution system.
Further, the air hose 12 is communicated with ambient atmosphere.
Further, the electronic control unit 21 includes signal conversion module, and the signal conversion module will be for that will count
Word signal is converted to analog signal.
The engine dynamometer of engine dynamometer and second testing stand 2 configuration that first testing stand 1 configures
Measurement range it is different.
The first control is provided in first connecting tube 3 between first testing stand 1 and the main exhaust 22
Valve 5 is provided with the second control valve 6 in first connecting tube 3 between first testing stand 1 and the dilution part, described
It is provided with third control valve 7 in second connecting tube 4 between second testing stand 2 and the main exhaust 22, described second
It is provided with the 4th control valve 8 in second connecting tube 4 between testing stand 2 and the dilution part, first control valve 5,
Second control valve 6, the third control valve 7 and the 4th control valve 8 are electrically connected with the electronic control unit 21
It connects.
Further, first control valve 5, second control valve 6, the third control valve 7 and the 4th control
Valve 8 processed is automatically controlled butterfly valve.
Further, first control valve 5, second control valve 6, the third control valve 7 and the described 4th
Control valve 8 is electrically connected with the electronic control unit 21, passes through first control valve 5, second control valve 6, described
The adjustment of motor exhaust flow direction is realized in the opening and closing of three control valves 7 and the 4th control valve 8.
The heating system includes the first heating wire 9 and the second heating wire 10, and first heating wire 9 is located at described the
On the outer wall of first connecting tube 3 between one testing stand 1 and the dilution part, second heating wire 10 is located at described the
On the outer wall of second connecting tube 4 between two testing stands 2 and the dilution part.
The outer wall of first connecting tube 3 and second connecting tube 4 is coated with heat-isolating flame retardant material 16, the heat-insulated resistance
First heating wire 9, second heating wire 10 and the temperature sensor 11 are coated on interior by combustible material 16.
The temperature sensor 11 is separately positioned on junction and institute of first connecting tube 3 with the dilution chamber 14
State the junction of the second connecting tube 4 and the dilution chamber 14.
The air pump 18 is arranged in close to the side of the dilution chamber 14 in the venturi mixer 17.
First heating wire 9 and second heating wire 10 are electrically connected with the electronic control unit 21.
The temperature sensor 11 is patch type temperature sensor 11.
The control unit includes host 20, and the host 20 is for controlling the control valve, the heating system, the temperature
Spend sensor 11.
Further, the host 20 is connected by serial port communication line with the electronic control unit 21, wherein host 20
In configured with controlling first control valve 5, second control valve 6, the third control valve 7 and the 4th control valve 8
It opens or closes, first heating wire 9 and second heating wire 10 opens or closes and the program of temperature display.
When the exhaust of first testing stand 1 needs to access dilution part, operator inputs in the program of host 20
First control valve 5,8 shutdown signal of the 4th control valve and the second control valve 6,7 opening signal of third control valve, electronic control unit
21 receive after the corresponding digital signal of the input of host 20 using signal conversion module, which is converted to simulation letter
Number, and by signal communication cable by analog signal transmission to the first control valve 5, the 4th control valve 8, the second control valve 6 and the
Three control valves 7, the first control valve 5, the 4th control valve 8, the second control valve 6 and third control valve 7 receive corresponding simulation letter
Corresponding actions are made after number, the exhaust of the first testing stand 1 at this time flows to dilution part, and the exhaust of the second testing stand 2 flows to main exhaust
Pipe 22.Conversely, controlling the second control valve 6 and third by host 20 when the exhaust of the second testing stand 2 needs to access dilution part
Control valve 7 is closed, and the first control valve 5 and the 4th control valve 8 are opened.
Two temperature sensors 11 measure the gas for entering dilution part by the first connecting tube 3 and the second connecting tube 4 always
Temperature, the heating threshold value of preset first heater strip and the second heater strip is 200 DEG C in host computer, electronic control unit 21
Judged by the signal of two temperature sensors 11, when observed temperature is lower than 200 DEG C, electronic control unit 21 is to first
Heater strip and the second heater strip output analog signal heat the first heater strip and the second heater strip, when observed temperature is higher than
At 200 DEG C, electronic control unit 21 makes it stop heating the first heater strip and the second heater strip output analog signal, analysis portion
19 pairs of gases carry out analysis detection.
The embodiments of the present invention are in parallel with dilution part by the first connecting tube 3 and the second connecting tube 4, realize two
Platform engine access dilution part is switched fast, therefore operator can be by coordinating lower stage on engine, equipment peace
Adjustment examination time and using among project CVS free time carry out two it is jack horse test bed be used alternatingly, to mention
Rise the service efficiency of equipment；It is mutual measurement range can be configured by two engine rig test platforms provided by the present embodiment
The dynamometer machine of benefit, such as: the dynamometer machine of a jack horse test bed configuration 220KW, in addition a jack horse test bed configuration 330KW measurement of power
Machine, thus operator can by change two engines the first connecting tube 3 and the second connecting tube 4 and dilution part it is logical
Disconnected, the CVS made can meet the emission testing of huge discharge (being more than or equal to 10L) and small displacement (being less than or equal to 4L) engine；First
The heating wire and heat-isolating flame retardant material 16 that connecting tube 3 and the second connecting tube 4 install additional, can effectively ensure that the accuracy of measurement data
And the deposit of moisture caused by preventing because of pipeline bending, extension.
Equipment provided by the utility model is integrated with jack horse test bed pipeline, by electronically controlled valve come real
When adjustment different jack horse test bed pipelines and dilution part on-off, and guaranteed by heating wire and heat insulation flame-retardant material 16
The temperature of gas in pipeline, to realize two jack horse test bed harmony, high efficiency and measurements when being used in conjunction with CVS
The accuracy of data.
A kind of full flow type tail gas dilution system of twin-engined racks is provided in the embodiments of the present invention, it can
By way of the jack horse test bed shared full flow type dilution system of measurement range two engine dynamometers complimentary to one another, it will manage
Control valve electronic signal in the arrangement and pipeline on road is controlled, and realizes that two two jack horse test bed and full flow type dilutes
The connection of system can toggle rapidly, can use the rank of jack horse test bed installation and removal and different tests project
Connect time, the urgent state of demand of high degree slowed down to equipment, the utilization efficiency of lifting means.
Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic
It is equivalently replaced.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of full flow type tail gas dilution system of twin-engined racks, which is characterized in that including jack horse test bed group, with
Described jack horse test bed group passes through the dilution part of piping connection, the analysis portion connecting with the dilution part and for controlling devices
Control unit；
Described jack horse test bed group includes the first testing stand and the second testing stand for being each configured with engine dynamometer, and described
One testing stand is connected with main exhaust and dilution part respectively by the first connecting tube, and second testing stand passes through the second connection
Pipe is connected with main exhaust and dilution part respectively, is provided with control in first connecting tube and second connecting tube
Valve, heating system and temperature sensor；
The dilution part includes having the dilution chamber of hollow structure, and one end of the dilution chamber is provided with air hose, and the other end is set
It is equipped with mixing tube, air cleaner is provided on the air hose, is provided with venturi mixer and air on the mixing tube
Pump, first connecting tube and second connecting tube penetrate in the dilution chamber and end is parallel to the air hose and described
Mixing tube；
The analysis portion is connected with the mixing tube, and the analysis portion includes gas analyzer and amounts of particles analyzer；
The control unit includes the electronic control list being electrically connected with the control valve, the heating system, the temperature sensor
Member, the electronic control unit are connect with main-machine communication.
2. a kind of full flow type tail gas dilution system of twin-engined racks according to claim 1, which is characterized in that
The measurement range of the engine dynamometer of the engine dynamometer and second testing stand configuration of the first testing stand configuration
It is different.
3. a kind of full flow type tail gas dilution system of twin-engined racks according to claim 1, which is characterized in that
The first control valve, first examination are provided in first connecting tube between first testing stand and the main exhaust
It tests in first connecting tube between platform and the dilution part and is provided with the second control valve, second testing stand and the master
Third control valve is provided in second connecting tube between exhaust pipe, between second testing stand and the dilution part
The 4th control valve, first control valve, second control valve, the third control valve are provided in second connecting tube
It is electrically connected with the electronic control unit with the 4th control valve.
4. a kind of full flow type tail gas dilution system of twin-engined racks according to claim 1, which is characterized in that
The heating system include the first heating wire and the second heating wire, first heating wire be located at first testing stand with it is described
On the outer wall of first connecting tube between dilution part, second heating wire is located at second testing stand and the dilution
On the outer wall of second connecting tube between portion.
5. a kind of full flow type tail gas dilution system of twin-engined racks according to claim 4, which is characterized in that
The outer wall of first connecting tube and second connecting tube is coated with heat-isolating flame retardant material, and the heat-isolating flame retardant material will be described
In first heating wire, second heating wire and the temperature sensor are coated on.
6. a kind of full flow type tail gas dilution system of twin-engined racks according to claim 1, which is characterized in that
The temperature sensor be separately positioned on first connecting tube and the dilution chamber junction and second connecting tube
With the junction of the dilution chamber.
7. a kind of full flow type tail gas dilution system of twin-engined racks according to claim 1, which is characterized in that
The air pump is arranged in close to the side of the dilution chamber in the venturi mixer.
8. a kind of full flow type tail gas dilution system of twin-engined racks according to claim 4, which is characterized in that
First heating wire and second heating wire are electrically connected with the electronic control unit.
9. a kind of full flow type tail gas dilution system of twin-engined racks according to claim 1, which is characterized in that
The temperature sensor is patch type temperature sensor.
10. a kind of full flow type tail gas dilution system of twin-engined racks according to claim 1, feature exist
In the control unit includes host, and the host is for controlling the control valve, the heating system, the temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821009957.2U CN208705047U (en) | 2018-06-28 | 2018-06-28 | A kind of full flow type tail gas dilution system of twin-engined racks |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821009957.2U CN208705047U (en) | 2018-06-28 | 2018-06-28 | A kind of full flow type tail gas dilution system of twin-engined racks |
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| CN208705047U true CN208705047U (en) | 2019-04-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572078A (en) * | 2018-06-28 | 2018-09-25 | 无锡沃尔福汽车技术有限公司 | A kind of full flow type tail gas dilution system of twin-engined racks |
-
2018
- 2018-06-28 CN CN201821009957.2U patent/CN208705047U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108572078A (en) * | 2018-06-28 | 2018-09-25 | 无锡沃尔福汽车技术有限公司 | A kind of full flow type tail gas dilution system of twin-engined racks |
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