CN103590879B - Exhaust aftertreatment test system and method - Google Patents
Exhaust aftertreatment test system and method Download PDFInfo
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- CN103590879B CN103590879B CN201310625758.XA CN201310625758A CN103590879B CN 103590879 B CN103590879 B CN 103590879B CN 201310625758 A CN201310625758 A CN 201310625758A CN 103590879 B CN103590879 B CN 103590879B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The present invention proposes a kind of exhaust aftertreatment test system and method, and wherein, system comprises: multiple gas generator; By the air distributing device that the first gas circuit is connected with multiple gas generator; By the heating equipment that the second gas circuit is connected with air distributing device; Be arranged on the first flow controlling device in the second gas circuit; Test chamber; Be arranged on the after-treatment device to be measured in test chamber, after-treatment device to be measured is connected with heating equipment by the 3rd gas circuit; Exhaust gas analyzer, is connected with the process front end of after-treatment device to be measured by the 4th gas circuit, and is connected with the process rear end of after-treatment device to be measured by the 5th gas circuit; Master control set, is connected with air distributing device, heating equipment, first flow controlling device, test chamber and exhaust gas analyzer.The exhaust aftertreatment test method of the embodiment of the present invention, can effectively reduce test error, makes test result more accurate, and can test whole after-treatment device, also can assess the conformity of after-treatment device.
Description
Technical field
The present invention relates to automobile manufacturing field, particularly a kind of exhaust aftertreatment test system and method.
Background technique
Exhaust after treatment system in car load vent systems can process vehicle exhaust, can reduce the pollutant in tail gas.The ability of exhaust after treatment system cleaning of off-gas determines vehicle and whether can meet corresponding emission standard, therefore needs to test the performance of exhaust after treatment system, to assess its purified treatment ability.Great majority all need to carry out on car load to the testing property of exhaust after treatment system, because car load operationally exists instantaneous conditions, as start or flame-out time, or the situation etc. of the instability of fuel combustion, cause exhaust gas component to differ greatly, thus cause exhaust after treatment system performance detection environment unstable.In this case, exhaust after treatment system testing property will be subject to the impact of multiple unstable variable, and cannot carry out objective assessment to the performance of exhaust after treatment system.
In correlation technique, a part of sample can be got test as sample, to assess the performance of the overall reprocessing of exhaust after treatment system by the carrier part in exhaust after treatment system.But only carry out testing property and evaluation to sample, the test result of acquisition can only reflect the performance of sample, cannot represent the performance of whole carrier completely, test result is inaccurate, therefore also cannot represent the performance of whole exhaust after treatment system.
Summary of the invention
The present invention is intended to solve the problems of the technologies described above at least to a certain extent.
For this reason, first object of the present invention is to propose a kind of exhaust aftertreatment test system, can effectively reduce test error, make test result more accurate, and can test whole after-treatment device, also can assess the conformity of after-treatment device.
Second object of the present invention is to propose a kind of exhaust aftertreatment test method.
For reaching above-mentioned purpose, first aspect present invention embodiment proposes a kind of exhaust aftertreatment test system, comprising: multiple gas generator, and described multiple gas generator is used for providing multiple source of the gas, air distributing device, described air distributing device is connected with described multiple gas generator by the first gas circuit, for being configured described multiple source of the gas according to allocation ratio, and generates mixed gas, heating equipment, described heating equipment is connected with described air distributing device by the second gas circuit, for heating the described mixed gas in described heating equipment, first flow controlling device, described first flow controlling device is arranged in described second gas circuit, for regulating the influx of the mixed gas flowing into described heating equipment, test chamber, be arranged on the after-treatment device to be measured in described test chamber, described after-treatment device to be measured is connected with described heating equipment by the 3rd gas circuit, for carrying out reprocessing to the mixed gas after heating, exhaust gas analyzer, described exhaust gas analyzer is connected with the process front end of described after-treatment device to be measured by the 4th gas circuit, and be connected by the process rear end of the 5th gas circuit with described after-treatment device to be measured, for analyzing the second constituent of mixed gas after the first constituent of the mixed gas before described after-treatment device process to be measured and process respectively, master control set, described master control set and described air distributing device, described heating equipment, described first flow controlling device, described test chamber and described exhaust gas analyzer are connected, distribution is carried out according to described allocation ratio for controlling described air distributing device, and control the temperature of described heating devices heat mixed gas, and control the influx that described first flow controlling device regulates the mixed gas flowing into described heating equipment, and the temperature controlled in described test chamber, to make temperature in described test chamber in preset temperature range, and according to described first constituent and described second constituent, described after-treatment device to be measured is tested.
The exhaust aftertreatment test system of the embodiment of the present invention, master control set, by controlling the aperture of solenoid valve corresponding to different source of the gas and stablize controlled heating equipment in air distributing device, can ensure to configure the high-temperature gas mixture body with stable concentration, composition and temperature; And the flow of mixed gas can be controlled by first flow control gear, thus ensure the stable of air-flow in test process; In addition, after-treatment device to be measured, in temperature stabilization test chamber within the specific limits, ensures that after-treatment device to be measured is in stable ambient condition in the course of the work, can effectively reduce test error, make test result more accurate; Meanwhile, transformation efficiency test can be realized in conjunction with exhaust gas analyzer, can test whole after-treatment device, and the testing property of the catalytic converter of non-individual, and can assess the conformity of after-treatment device.
In one embodiment of the invention, above-mentioned exhaust aftertreatment test system also comprises: back pressure simulator, described back pressure simulator is connected with described master control set, and be connected with described after-treatment device to be measured by the 6th gas circuit, mixed gas after described after-treatment device process to be measured is discharged by described back pressure simulator, described back pressure simulator is used for providing exhaust resistance according to back pressure loss value when discharging the mixed gas after described process, and described master control set is also for controlling the back pressure loss value of described back pressure simulator.Wherein, described back pressure simulator comprises: blower fan, and described blower fan is connected with described after-treatment device to be measured by the 7th gas circuit, for passing through to described after-treatment device output gas flow to be measured to provide exhaust resistance during described after-treatment device exhaust to be measured; Second quantity regulating device, described second quantity regulating device is arranged in described 7th gas circuit, for regulating the gas outflow of described blower fan; Described master control set is also connected with described second quantity regulating device with described blower fan, and controls the value of the back pressure loss of described back pressure simulator by the value controlling the aperture of described blower fan and the gas outflow of described second quantity regulating device.Thus can accurate simulation airflow, ensure the stable of back pressure.
In one embodiment of the invention, in order to the stable of pressure in whole exhaust aftertreatment test system can be ensured, above-mentioned exhaust aftertreatment test system also comprises: pressure relief device, described pressure relief device is arranged on described heating equipment, and be connected with outside, regulate the pressure in described heating equipment for being externally vented, described master control set is also for pressure relief device work according to the Stress control in described heating equipment.
In one embodiment of the invention, the joint of described air distributing device and described multiple gas generator is respectively arranged with multiple solenoid valve; Described air distributing device controls the open and-shut mode of described multiple solenoid valve, to be configured described multiple source of the gas according to allocation ratio according to the control command of described master control set.
In one embodiment of the invention, described first flow controlling device is electronic flowmeter.
In one embodiment of the invention, described second quantity regulating device is flow control valve.
Second aspect present invention embodiment provides a kind of exhaust aftertreatment test method, comprising: be configured multiple source of the gas according to allocation ratio, and generate mixed gas; Control described mixed gas and enter heating equipment, described mixed gas is heated, and control the temperature of described mixed gas; Analyze the first constituent of the mixed gas after heating; By the after-treatment device to be measured under the environment that is in preset temperature range, the mixed gas after described heating is processed, and the second constituent of mixed gas after analysing and processing; According to described first constituent and described second constituent, described after-treatment device to be measured is tested.
The exhaust aftertreatment test method of the embodiment of the present invention, can be configured multiple source of the gas according to allocation ratio, and the mixed gas controlling configuration enters heating equipment, can ensure to configure the high-temperature gas mixture body with stable concentration, composition and temperature, and the stable of air-flow in test process can be ensured; In addition, by the after-treatment device to be measured be in the test chamber of temperature stabilization, mixed gas is processed, can ensure that after-treatment device to be measured is in stable ambient condition in the course of the work, thus effectively reduce test error, make test result more accurate; Meanwhile, transformation efficiency test can be realized, can test whole after-treatment device, and the testing property of the catalytic converter of non-individual, and can assess the conformity of after-treatment device.
In one embodiment of the invention, in order to can accurate simulation airflow, ensure the stable of back pressure, above-mentioned exhaust aftertreatment test method, also comprise: obtain back pressure loss value, and provide exhaust resistance when discharging the mixed gas after described process according to described back pressure loss value.
In one embodiment of the invention, in order to the stable of pressure in whole exhaust aftertreatment test system can be ensured, above-mentioned exhaust aftertreatment test method, also comprises: in the process heated described mixed gas, regulates the pressure in described heating equipment.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage will become obvious and easy understand from accompanying drawing below combining to the description of embodiment, wherein:
Fig. 1 is the structured flowchart of exhaust aftertreatment test system according to an embodiment of the invention;
Fig. 2 is the structured flowchart of exhaust aftertreatment test system in accordance with another embodiment of the present invention;
Fig. 3 is the structured flowchart of the master control set of one embodiment of the invention;
Fig. 4 is the flow chart of exhaust aftertreatment test method according to an embodiment of the invention;
Fig. 5 is the flow chart of exhaust aftertreatment test method in accordance with another embodiment of the present invention.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance.
In describing the invention, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Below with reference to the accompanying drawings exhaust aftertreatment test system according to the embodiment of the present invention and method are described.
Fig. 1 is the structured flowchart of exhaust aftertreatment test system according to an embodiment of the invention.
As shown in Figure 1, according to the exhaust aftertreatment test system of the embodiment of the present invention, comprising: multiple gas generator 100, air distributing device 200, heating equipment 300, first flow controlling device 400, test chamber 500, after-treatment device to be measured 600, exhaust gas analyzer 700 and master control set 800.
Particularly, air distributing device 200 is connected with multiple gas generator 100 by the first gas circuit, heating equipment 300 is connected with air distributing device 200 by the second gas circuit, and in the second gas circuit, be provided with first flow controlling device 400, after-treatment device 600 to be measured is arranged in test chamber 500, and be connected with heating equipment 300 by the 3rd gas circuit, exhaust gas analyzer 700 is connected with the process front end of after-treatment device 600 to be measured by the 4th gas circuit, and be connected with the process rear end of after-treatment device to be measured by the 5th gas circuit, master control set 800 and air distributing device 200, heating equipment 300, first flow controlling device 400, test chamber 500 and exhaust gas analyzer 700 are connected,
Gas generator 100 is for providing source of the gas.Multiple gas generator 100 can provide multiple source of the gas, as the source of the gas of the gases such as oxygen, nitrogen, nitrogen oxide, oxysulfide, carbon dioxide, carbon monoxide.In an embodiment of the present invention, multiple gas generator 100 can need to provide the different pollutant needed for test or routine (as oxygen, nitrogen etc.) gas according to test.
Air distributing device 200 for being configured multiple source of the gas according to allocation ratio, and generates mixed gas.In one embodiment of the invention, air distributing device 200 is respectively arranged with multiple solenoid valve with the joint of multiple gas generator 100, air distributing device 200 can control the open and-shut mode of multiple solenoid valve according to the control command of master control set 800, to be configured multiple source of the gas according to allocation ratio.In an embodiment of the present invention, the allocation ratio of each gas that master control set 800 can need according to test, determines the requirement of each gas, and controls the unlatching duration of solenoid valve corresponding to each gas.
For example, as needed simulated engine tail gas, then master control set 800 can obtain the data of the ratio of each gas with various in motor exhaust, and these data are controlled the opening and closing state of solenoid valve corresponding to above-mentioned gas with various as allocation ratio, reach to allocation ratio to make the mixed proportion to the gas in air distributing device 200.
First flow controlling device 400 is for regulating the influx of the mixed gas flowing into heating equipment 300 from air distributing device 200.More specifically, in one embodiment of the invention, first flow controlling device 400 can be electronic flowmeter.Master control set 800 can control the aperture of electronic flowmeter to control the influx of the mixed gas flowing into heating equipment 300.
Heating equipment 300 is for heating the mixed gas in heating equipment 300.In one embodiment of the invention, the entrance and exit place of heating equipment 300 is provided with temperature transducer, the temperature of the mixed gas in heating equipment 300 can be detected, and send to master control set 800, and then whether master control set 800 can control heating equipment 300 according to the gap of the temperature detected and desired temperature and continue to heat.In an embodiment of the present invention, heating equipment 300 heats mixed gas by heating resistor (as electrical heating wire).Master control set 800 controls the speed of heating, cooling by the power controlling heating resistor and reaches the object of maximum temperature, and then make mixed gas reach temperature requirement, such as, if simulated engine tail gas, then the temperature that can control mixed gas reaches the temperature range of vehicle exhaust.
After-treatment device 600 to be measured is for carrying out reprocessing to the mixed gas after heating.In one embodiment of the invention, temperature in test chamber 500 can control within the scope of a stationary temperature by master control set 800, can work under a stable temperature environment to make after-treatment device 600 to be measured, such as, during for simulated engine vent gas treatment, can by the temperature stabilization in test chamber 500 in the temperature range consistent with temperature environment residing for engine exhaust gas processing unit.The entrance and exit place of after-treatment device 600 to be measured is provided with temperature transducer, inside temperature when after-treatment device 600 to be measured works can be detected, and the temperature detected is sent to master control set 800, and then master control set 800 can control the power of heating resistor in heating equipment 300 according to the temperature detected, to ensure the stable of gas flow temperature.
In addition, in one embodiment of the invention, in test chamber 500, placed machine frame, the trend of mixed gas in after-treatment device to be measured can be ensured.
Exhaust gas analyzer 700 is for analyzing the second constituent of mixed gas after the first constituent of the mixed gas before after-treatment device 600 to be measured process and process respectively.
Master control set 800 carries out distribution for controlling air distributing device 200 according to allocation ratio, and control the temperature that heating equipment 300 heats mixed gas, and control the influx that first flow controlling device 400 regulates the mixed gas flowing into heating equipment 300, and the temperature controlled in test chamber 500, to make temperature in test chamber 500 in preset temperature range, and treat after logging process device 600 according to the first constituent and the second constituent and test.In an embodiment of the present invention, master control set 800 judges the temperature of the mixed gas in exhaust aftertreatment test system by the temperature transducer of the outlet and ingress that are arranged on heating equipment 300 and after-treatment device to be measured 600, and judge the gap between this temperature and temperature of setting, and control the rate of heat addition of heating equipment and the target temperature of heating, to ensure the stability of gas flow temperature in whole exhaust aftertreatment test system according to judged result.
The exhaust aftertreatment test system of the embodiment of the present invention, master control set, by controlling the aperture of solenoid valve corresponding to different source of the gas and stablize controlled heating equipment in air distributing device, can ensure to configure the high-temperature gas mixture body with stable concentration, composition and temperature; And the flow of mixed gas can be controlled by first flow control gear, thus ensure the stable of air-flow in test process; In addition, after-treatment device to be measured, in temperature stabilization test chamber within the specific limits, ensures that after-treatment device to be measured is in stable ambient condition in the course of the work, can effectively reduce test error, make test result more accurate; Meanwhile, transformation efficiency test can be realized in conjunction with exhaust gas analyzer, can test whole after-treatment device, and the testing property of the catalytic converter of non-individual, and can assess the conformity of after-treatment device.
Fig. 2 is the structured flowchart of exhaust aftertreatment test system in accordance with another embodiment of the present invention.
As shown in Figure 2, according to the exhaust aftertreatment test system of the embodiment of the present invention, comprise: multiple gas generator 100, air distributing device 200, heating equipment 300, first flow controlling device 400, test chamber 500, after-treatment device to be measured 600, exhaust gas analyzer 700, master control set 800, back pressure simulator 900, pressure relief device 1000, blower fan 910 and second quantity regulating device 920, wherein, back pressure simulator 900 comprises blower fan 910 and second quantity regulating device 920.
Particularly, back pressure simulator 900 is connected with master control set 800, and is connected with after-treatment device 600 to be measured by the 6th gas circuit, and the mixed gas after after-treatment device process to be measured is discharged by back pressure simulator 900; Pressure relief device 1000 is arranged on heating equipment 300, and is connected with outside.
Back pressure simulator 900 is for providing exhaust resistance according to back pressure loss value when discharging the mixed gas after after-treatment device 600 to be measured process.Wherein, master control set 800 can control back pressure loss value.Back pressure loss value is obtained by the back pressure difference of master control set according to exhaust aftertreatment test system and actual exhaust gas releasing system.More specifically, in one embodiment of the invention, back pressure simulator 900 comprises blower fan 910 and second quantity regulating device 920.Wherein, blower fan 910 is connected with after-treatment device 600 to be measured by the 7th gas circuit, second quantity regulating device 920 is arranged in the 7th gas circuit, by blower fan 910 to after-treatment device 600 output gas flow to be measured, and by regulating the aperture of blower fan 910 and second quantity regulating device 920, regulate the gas outflow of blower fan, make back pressure loss reach back pressure loss value, thus realize the simulation of the back pressure loss to car load baffler and tail pipe part.Master control set 800 and second quantity regulating device 920, control back pressure loss with the aperture by controlling second quantity regulating device 920.
Pressure relief device 1000 regulates the pressure in heating equipment 300 for being externally vented, and master control set 800 is also for working according to the Stress control pressure relief device 1000 in heating equipment 300.In one embodiment of the invention, pressure relief device 1000 can be Decompression valves.More specifically, heating equipment 300 inside is provided with pressure transducer, the pressure in heating equipment 300 can be detected, when the pressure detected is sent to master control set 800 by pressure transducer, master control set 800 can compare according to the pressure detected and the pressure needed for test, if pressure is excessive, then can control Decompression valves to open, to be outwards vented, and the aperture of Decompression valves can be controlled according to the pressure detected and the gap of the pressure needed for test, conform to the pressure needed for test to make the pressure in exhaust post heating device 300.
In an embodiment of the present invention, inner at air distributing device 200, the outlet of pressure relief device 1000 entrance and after-treatment device to be measured 600 and ingress all can arrange pressure transducer, and in test process, detect the pressure of relevant position, analyze to be sent to master control set 800, thus master control set 800 can according to the Stress control first flow controlling device 400 in different device, second quantity regulating device 920 in back pressure simulator 900 and the work of pressure relief device 1000, in the process of circulation, pressure stability is kept to make the gas in exhaust aftertreatment test system.
The exhaust aftertreatment test system of the embodiment of the present invention, the passing ability of air-flow when can ensure to test by back pressure simulator, to ensure the stable of back pressure, and ensure the stable of pressure in whole exhaust aftertreatment test system by pressure relief device, further reduce test error, thus improve the accuracy of test result.
In one embodiment of the invention, as shown in Figure 3, be the structured flowchart of the master control set of one embodiment of the invention.Master control set 800 can comprise master control analysis module 810, main control module 820, solenoid valve control module 830, flow-control module 840, heating control module 850 and pressure control module 860 further.
Particularly, master control analysis module 810 can receive the signal of other devices feedback in exhaust aftertreatment test system, the data on flows that the temperature and pressure that the concentration of each source of the gas, heating equipment 300 or the after-treatment device to be measured 600 that feed back as air distributing device 200 feed back and first flow controlling device 400 and second quantity regulating device 920 feed back, and these signals are analyzed, the gap of the corresponding data needed for judging present case and testing, and send the control command for different device accordingly.Master control analysis module 810 is also connected with the exhaust gas analyzer 700 outside master control set 800, to analyze the first constituent and the second constituent, and tests after-treatment device to be tested according to analysis result.
Main control module 820 is passed to corresponding control module for the control command sent by master control analysis module 810, controls corresponding device to make corresponding control module.
Solenoid valve control module 830 for realizing the open and close of solenoid valve according to the electric shock of control command control relay, thus controls the concentration of mixed gas.
Flow-control module 840 for controlling the aperture of first flow controlling device 400 and second quantity regulating device 920 according to control command, to ensure the stable of air flow rate in exhaust aftertreatment test system.
Heating control module 850, for regulating the power of the heating resistor in heating equipment 300 according to control command, to control the speed of heating and cooling, and maximum temperature, makes the temperature stabilization of mixed gas.
Pressure control module 860 is for controlling the exhaust work of pressure relief device, to be the stable gas pressure in exhaust aftertreatment test system according to control command.
In order to realize above-described embodiment, the present invention also proposes a kind of exhaust aftertreatment test method.
Fig. 4 is the flow chart of exhaust aftertreatment test method according to an embodiment of the invention.
As shown in Figure 4, according to the exhaust aftertreatment test method of the embodiment of the present invention, comprising:
S401, is configured multiple source of the gas according to allocation ratio, and generates mixed gas.
In one embodiment of the invention, each source of the gas has a source of the gas generator, the joint of each source of the gas generator and air distributing device is respectively arranged with a solenoid valve, air distributing device can control the open and-shut mode of multiple solenoid valve according to the control command of master control set, to be configured multiple source of the gas according to allocation ratio.In an embodiment of the present invention, the allocation ratio of each gas that master control set can need according to test, determines the requirement of each gas, and controls the unlatching duration of solenoid valve corresponding to each gas.For example, as needed simulated engine tail gas, then master control set can obtain the data of the ratio of each gas with various in motor exhaust, and these data are controlled the opening and closing state of solenoid valve corresponding to above-mentioned gas with various as allocation ratio, reach to allocation ratio to make the mixed proportion to the gas in air distributing device.
S402, controls mixed gas and enters heating equipment, heat, and control the temperature of mixed gas to mixed gas.
In an embodiment of the present invention, the influx of the mixed gas flowing into heating equipment from air distributing device is regulated by first flow controlling device.Particularly, first flow controlling device can be electronic flowmeter.Master control set can control the aperture of electronic flowmeter to control the influx of the mixed gas flowing into heating equipment.
By heating equipment, mixed gas is wherein heated.In one embodiment of the invention, the entrance and exit place of heating equipment is provided with temperature transducer, the temperature of the mixed gas in heating equipment can be detected, and send to master control set, and then whether master control set can control heating equipment according to the gap of the temperature detected and desired temperature and continue to heat.In an embodiment of the present invention, heating equipment heats mixed gas by heating resistor (as electrical heating wire).Master control set controls the speed of heating, cooling by the power controlling heating resistor and reaches the object of maximum temperature, and then make mixed gas reach temperature requirement, such as, if simulated engine tail gas, then the temperature that can control mixed gas reaches the temperature range of vehicle exhaust.
S403, analyzes the first constituent of the mixed gas after heating.In an embodiment of the present invention, by exhaust gas analyzer, the first constituent analysing the mixed gas after heating is analyzed.
S404, is processed the mixed gas after heating by the after-treatment device to be measured under the environment that is in preset temperature range, and the second constituent of mixed gas after analysing and processing.
In an embodiment of the present invention, by exhaust gas analyzer, the second constituent analysing the mixed gas after process is analyzed.After-treatment device to be measured can be arranged in the test chamber with steady temperature scope, works under a stable temperature environment to enable after-treatment device to be measured.The entrance and exit place of after-treatment device to be measured is provided with temperature transducer, inside temperature during after-treatment device to be measured work can be detected, and the temperature detected is sent to master control set, and then master control set can control the power of heating resistor in heating equipment according to the temperature detected, to ensure the stable of gas flow temperature.
S405, treats after logging process device according to the first constituent and the second constituent and tests.
The exhaust aftertreatment test method of the embodiment of the present invention, can be configured multiple source of the gas according to allocation ratio, and the mixed gas controlling configuration enters heating equipment, can ensure to configure the high-temperature gas mixture body with stable concentration, composition and temperature, and the stable of air-flow in test process can be ensured; In addition, by the after-treatment device to be measured be in the test chamber of temperature stabilization, mixed gas is processed, can ensure that after-treatment device to be measured is in stable ambient condition in the course of the work, thus effectively reduce test error, make test result more accurate; Meanwhile, transformation efficiency test can be realized, can test whole after-treatment device, and the testing property of the catalytic converter of non-individual, and can assess the conformity of after-treatment device.
Fig. 5 is the flow chart of exhaust aftertreatment test method in accordance with another embodiment of the present invention.
As shown in Figure 5, according to the exhaust aftertreatment test method of the embodiment of the present invention, comprising:
S501, is configured multiple source of the gas according to allocation ratio, and generates mixed gas.
In one embodiment of the invention, each source of the gas has a source of the gas generator, the joint of each source of the gas generator and air distributing device is respectively arranged with a solenoid valve, air distributing device can control the open and-shut mode of multiple solenoid valve according to the control command of master control set, to be configured multiple source of the gas according to allocation ratio.In an embodiment of the present invention, the allocation ratio of each gas that master control set can need according to test, determines the requirement of each gas, and controls the unlatching duration of solenoid valve corresponding to each gas.For example, as needed simulated engine tail gas, then master control set can obtain the data of the ratio of each gas with various in motor exhaust, and these data are controlled the opening and closing state of solenoid valve corresponding to above-mentioned gas with various as allocation ratio, reach to allocation ratio to make the mixed proportion to the gas in air distributing device.
S502, controls mixed gas and enters heating equipment, heat, and control the temperature of mixed gas to mixed gas.
In an embodiment of the present invention, the influx of the mixed gas flowing into heating equipment from air distributing device is regulated by first flow controlling device.Particularly, first flow controlling device can be electronic flowmeter.Master control set can control the aperture of electronic flowmeter to control the influx of the mixed gas flowing into heating equipment.
By heating equipment, mixed gas is wherein heated.In one embodiment of the invention, the entrance and exit place of heating equipment is provided with temperature transducer, the temperature of the mixed gas in heating equipment can be detected, and send to master control set, and then whether master control set can control heating equipment according to the gap of the temperature detected and desired temperature and continue to heat.In an embodiment of the present invention, heating equipment heats mixed gas by heating resistor (as electrical heating wire).Master control set controls the speed of heating, cooling by the power controlling heating resistor and reaches the object of maximum temperature, and then make mixed gas reach temperature requirement, such as, if simulated engine tail gas, then the temperature that can control mixed gas reaches the temperature range of vehicle exhaust.
S503, in the process heated mixed gas, regulates the pressure in heating equipment.
In one embodiment of the invention, by pressure relief device, as the pressure in the condition heating equipments such as Decompression valves.More specifically, heating equipment inside is provided with pressure transducer, the pressure in heating equipment can be detected, when the pressure detected is sent to master control set by pressure transducer, master control set can compare according to the pressure detected and the pressure needed for test, if pressure is excessive, then can control Decompression valves to open, to be outwards vented, and the aperture of Decompression valves can be controlled according to the pressure detected and the gap of the pressure needed for test, conform to the pressure needed for test to make the pressure in exhaust post heating device.
S504, analyzes the first constituent of the mixed gas after heating.In an embodiment of the present invention, by exhaust gas analyzer, the first constituent analysing the mixed gas after heating is analyzed.
S505, is processed the mixed gas after heating by the after-treatment device to be measured under the environment that is in preset temperature range, and the second constituent of mixed gas after analysing and processing.
In an embodiment of the present invention, by exhaust gas analyzer, the second constituent analysing the mixed gas after process is analyzed.After-treatment device to be measured can be arranged in the test chamber with steady temperature scope, works under a stable temperature environment to enable after-treatment device to be measured.The entrance and exit place of after-treatment device to be measured is provided with temperature transducer, inside temperature during after-treatment device to be measured work can be detected, and the temperature detected is sent to master control set, and then master control set can control the power of heating resistor in heating equipment according to the temperature detected, to ensure the stable of gas flow temperature.
S506, treats after logging process device according to the first constituent and the second constituent and tests.
S507, obtains back pressure loss value, and provides exhaust resistance when discharging the mixed gas after process according to back pressure loss value.Wherein, back pressure loss value is obtained by the back pressure difference of master control set according to exhaust aftertreatment test system and actual exhaust gas releasing system.
In an embodiment of the present invention, the back pressure simulator by being made up of blower fan and second quantity regulating device provides exhaust resistance according to back pressure loss value when discharging the mixed gas after after-treatment device process to be measured.Particularly, by blower fan to after-treatment device output gas flow to be measured, and by regulating the aperture of blower fan and second quantity regulating device, regulate the gas outflow value of blower fan, thus ensure the stable of back pressure, and make back pressure loss reach back pressure loss, thus realize the simulation of the back pressure loss to car load baffler and tail pipe part.
The exhaust aftertreatment test method of the embodiment of the present invention, by in the process heated mixed gas, regulate the pressure in heating equipment, and according to back pressure loss value, the mixed gas after after-treatment device process to be measured is discharged, ensure the passing ability of air-flow during test, and back pressure is stable, and ensure that the stable of pressure in whole exhaust aftertreatment test system, further reduce test error, thus improve the accuracy of test result.
In an embodiment of the present invention, outlet and the ingress of, pressure relief device entrance inner at air distributing device and after-treatment device to be measured all can arrange pressure transducer, and in test process, detect the pressure of relevant position, analyze to be sent to master control set 800, thus master control set according to the work of the Stress control first flow controlling device in different device, the second quantity regulating device in back pressure simulator 900 and pressure relief device, can keep pressure stability to make the gas in exhaust aftertreatment test system in the process of circulation.
Describe and can be understood in flow chart or in this any process otherwise described or method, represent and comprise one or more for realizing the module of the code of the executable instruction of the step of specific logical function or process, fragment or part, and the scope of the preferred embodiment of the present invention comprises other realization, wherein can not according to order that is shown or that discuss, comprise according to involved function by the mode while of basic or by contrary order, carry out n-back test, this should understand by embodiments of the invention person of ordinary skill in the field.
In flow charts represent or in this logic otherwise described and/or step, such as, the sequencing list of the executable instruction for realizing logical function can be considered to, may be embodied in any computer-readable medium, for instruction execution system, device or equipment (as computer based system, comprise the system of processor or other can from instruction execution system, device or equipment instruction fetch and perform the system of instruction) use, or to use in conjunction with these instruction execution systems, device or equipment.With regard to this specification, " computer-readable medium " can be anyly can to comprise, store, communicate, propagate or transmission procedure for instruction execution system, device or equipment or the device that uses in conjunction with these instruction execution systems, device or equipment.The example more specifically (non-exhaustive list) of computer-readable medium comprises following: the electrical connection section (electronic equipment) with one or more wiring, portable computer diskette box (magnetic device), random access memory (RAM), ROM (read-only memory) (ROM), erasablely edit ROM (read-only memory) (EPROM or flash memory), fiber device, and portable optic disk ROM (read-only memory) (CDROM).In addition, computer-readable medium can be even paper or other suitable media that can print described program thereon, because can such as by carrying out optical scanner to paper or other media, then carry out editing, decipher or carry out process with other suitable methods if desired and electronically obtain described program, be then stored in computer storage.
Should be appreciated that each several part of the present invention can realize with hardware, software, firmware or their combination.In the above-described embodiment, multiple step or method can with to store in memory and the software performed by suitable instruction execution system or firmware realize.Such as, if realized with hardware, the same in another embodiment, can realize by any one in following technology well known in the art or their combination: the discrete logic with the logic gates for realizing logical function to data-signal, there is the specific integrated circuit of suitable combinational logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA) etc.
Those skilled in the art are appreciated that realizing all or part of step that above-described embodiment method carries is that the hardware that can carry out instruction relevant by program completes, described program can be stored in a kind of computer-readable recording medium, this program perform time, step comprising embodiment of the method one or a combination set of.
In addition, each functional unit in each embodiment of the present invention can be integrated in a puocessing module, also can be that the independent physics of unit exists, also can be integrated in a module by two or more unit.Above-mentioned integrated module both can adopt the form of hardware to realize, and the form of software function module also can be adopted to realize.If described integrated module using the form of software function module realize and as independently production marketing or use time, also can be stored in a computer read/write memory medium.
The above-mentioned storage medium mentioned can be ROM (read-only memory), disk or CD etc.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalency thereof.
Claims (8)
1. an exhaust aftertreatment test system, is characterized in that, comprising:
Multiple gas generator, described multiple gas generator is used for providing multiple source of the gas;
Air distributing device, described air distributing device is connected with described multiple gas generator by the first gas circuit, for being configured described multiple source of the gas according to allocation ratio, and generates mixed gas;
Heating equipment, described heating equipment is connected with described air distributing device by the second gas circuit, for heating the described mixed gas in described heating equipment;
First flow controlling device, described first flow controlling device is arranged in described second gas circuit, for regulating the influx of the mixed gas flowing into described heating equipment;
Test chamber;
Be arranged on the after-treatment device to be measured in described test chamber, described after-treatment device to be measured is connected with described heating equipment by the 3rd gas circuit, for carrying out reprocessing to the mixed gas after heating;
Exhaust gas analyzer, described exhaust gas analyzer is connected with the process front end of described after-treatment device to be measured by the 4th gas circuit, and be connected by the process rear end of the 5th gas circuit with described after-treatment device to be measured, for analyzing the second constituent of mixed gas after the first constituent of the mixed gas before described after-treatment device process to be measured and process respectively;
Master control set, described master control set and described air distributing device, described heating equipment, described first flow controlling device, described test chamber and described exhaust gas analyzer are connected, distribution is carried out according to described allocation ratio for controlling described air distributing device, and control the temperature of described heating devices heat mixed gas, and control the influx that described first flow controlling device regulates the mixed gas flowing into described heating equipment, and the temperature controlled in described test chamber, to make temperature in described test chamber in preset temperature range, and according to described first constituent and described second constituent, described after-treatment device to be measured is tested,
Back pressure simulator, described back pressure simulator is connected with described master control set, and be connected with described after-treatment device to be measured by the 6th gas circuit, mixed gas after described after-treatment device process to be measured is discharged by described back pressure simulator, described back pressure simulator is used for providing exhaust resistance according to back pressure loss value when discharging the mixed gas after described process
Described master control set is also for controlling the back pressure loss value of described back pressure simulator.
2. the system as claimed in claim 1, is characterized in that, described back pressure simulator comprises:
Blower fan, described blower fan is connected with described after-treatment device to be measured by the 7th gas circuit, for passing through to described after-treatment device output gas flow to be measured to provide exhaust resistance during described after-treatment device exhaust to be measured;
Second quantity regulating device, described second quantity regulating device is arranged in described 7th gas circuit, for regulating the gas outflow of described blower fan;
Described master control set is also connected with described second quantity regulating device with described blower fan, and controls the value of the back pressure loss of described back pressure simulator by the value controlling the aperture of described blower fan and the gas outflow of described second quantity regulating device.
3. system as claimed in claim 1 or 2, is characterized in that, also comprise:
Pressure relief device, described pressure relief device is arranged on described heating equipment, and is connected with outside, regulates the pressure in described heating equipment for being externally vented,
Described master control set is also for pressure relief device work according to the Stress control in described heating equipment.
4. the system as claimed in claim 1, is characterized in that,
The joint of described air distributing device and described multiple gas generator is respectively arranged with multiple solenoid valve;
Described air distributing device controls the open and-shut mode of described multiple solenoid valve, to be configured described multiple source of the gas according to allocation ratio according to the control command of described master control set.
5. the system as claimed in claim 1, is characterized in that, described first flow controlling device is electronic flowmeter.
6. system as claimed in claim 2, it is characterized in that, described second quantity regulating device is flow control valve.
7. an exhaust aftertreatment test method, is characterized in that, comprising:
According to allocation ratio, multiple source of the gas is configured, and generates mixed gas;
Control described mixed gas and enter heating equipment, described mixed gas is heated, and control the temperature of described mixed gas;
Analyze the first constituent of the mixed gas after heating;
By the after-treatment device to be measured under the environment that is in preset temperature range, the mixed gas after described heating is processed, and the second constituent of mixed gas after analysing and processing;
According to described first constituent and described second constituent, described after-treatment device to be measured is tested;
Obtain back pressure loss value, and provide exhaust resistance when discharging the mixed gas after described process according to described back pressure loss value.
8. method as claimed in claim 7, is characterized in that, also comprise:
In the process that described mixed gas is heated, regulate the pressure in described heating equipment.
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| CN105004674A (en) * | 2015-08-04 | 2015-10-28 | 宁波海尔欣光电科技有限公司 | Device for detecting human body exhaled gas identification paramagnetic gas molecule concentration online |
| JP6864552B2 (en) | 2017-05-17 | 2021-04-28 | 株式会社Ｓｃｒｅｅｎホールディングス | Heat treatment equipment and heat treatment method |
| CN109236438A (en) * | 2018-09-18 | 2019-01-18 | 苏州道捷电子科技有限公司 | A kind of automobile exhaust tube detection device |
| DE112019007882T5 (en) * | 2019-11-07 | 2022-09-01 | Cummins Emission Solutions Inc. | Outlet port for an aftertreatment sensor |
| SG10202101459XA (en) * | 2020-02-25 | 2021-09-29 | Kc Co Ltd | Gas mixing supply device, mixing system, and gas mixing supply method |
| CN113670379A (en) * | 2021-08-13 | 2021-11-19 | 山东交通学院 | Tail gas pollutant emission simulation device and method |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431043A (en) * | 1994-05-02 | 1995-07-11 | General Motors Corporation | Catalyst activity test |
| US20010054281A1 (en) * | 2000-05-01 | 2001-12-27 | Adams Joseph M. | Non-engine based exhaust component rapid aging system |
| CN101138702A (en) * | 2007-06-15 | 2008-03-12 | 天津内燃机研究所 | Engine vent gas catalytic cleaner activation evaluating system |
| DE102008003085A1 (en) * | 2008-01-03 | 2009-07-09 | Robert Bosch Gmbh | Internal combustion engine for vehicle, has adjusting device diagnosed by exhaust gas sensor placed at exhaust outflow side, where exhaust gas characteristic measured by sensor is compared with modelled exhaust gas characteristic |
| CN102109507B (en) * | 2009-12-23 | 2014-08-13 | 比亚迪股份有限公司 | Performance testing system for automotive exhaust cleaning catalyst |
| CN101907287B (en) * | 2010-07-01 | 2012-07-04 | 宁波凯波集团有限公司 | Heat generating core with pressure relieving device |
| CN101858901B (en) * | 2010-07-07 | 2011-12-21 | 中国汽车技术研究中心 | System and method for testing activity of vehicle exhaust purification catalytic material |
| CN102121876B (en) * | 2010-12-17 | 2012-11-07 | 杭州银轮科技有限公司 | Test bed of postprocessing device for simulating diesel engine exhaust gas |
| CN102608277B (en) * | 2012-04-10 | 2014-05-07 | 无锡隆盛科技股份有限公司 | Detection method of detection system for oxynitride sensor |
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2013
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