CN102109507A - Performance testing system for automotive exhaust cleaning catalyst - Google Patents
Performance testing system for automotive exhaust cleaning catalyst Download PDFInfo
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- CN102109507A CN102109507A CN2009102599562A CN200910259956A CN102109507A CN 102109507 A CN102109507 A CN 102109507A CN 2009102599562 A CN2009102599562 A CN 2009102599562A CN 200910259956 A CN200910259956 A CN 200910259956A CN 102109507 A CN102109507 A CN 102109507A
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Abstract
The invention provides a performance testing system for an automotive exhaust cleaning catalyst, which comprises an air distribution subsystem (40), a reaction subsystem (50) and a measuring and control subsystem (60), wherein the reaction subsystem (50) comprises a reaction furnace (19); the reaction furnace (19) is used for containing the automotive exhaust cleaning catalyst (21); and the air distribution subsystem (40) is used for supplying a first gas (8) and a second gas (9) to the reaction furnace (19), and enables the first gas (8) and the second gas (9) to be alternately inputted into the reaction furnace (19) at respective constant rates within a predetermined alternation cycle. The performance testing system for the automotive exhaust cleaning catalyst can really simulate the air-fuel ratio fluctuation of exhaust under the working condition of an automotive engine, so that the performance test of the automotive exhaust cleaning catalyst is more accurate and effective.
Description
Technical field
The present invention relates to the Performance Test System of automobile, relate in particular to a kind of cleaning catalyst for tail gases of automobiles Performance Test System.
Background technology
Along with developing of automobile industry, automobile exhaust pollution problem paid more and more attention, effectively the Control of Automobile tail gas pollution has become the environmental issue of being badly in need of solution.With noble metals such as Pt, Pd, Rh is that the cleaning catalyst for tail gases of automobiles of main effective constituent can play the effect that reduces the automobile exhaust pollution thing preferably, has obtained widespread use in automobile production.
In the stages such as exploitation, production and application of cleaning catalyst for tail gases of automobiles, need carry out performance test to cleaning catalyst for tail gases of automobiles at aspects such as vehicle exhaust transformation efficiency, catalyzer ignition performance, catalyzer air speed performance, durability of catalysts, so that filter out cleaning catalyst for tail gases of automobiles efficiently.
Current test to cleaning catalyst for tail gases of automobiles can realize on engine pedestal, car load, but this is that the method for testing investment of source of the gas is big, testing cost is higher with the engine exhaust, and engine exhaust complicated component, be difficult to control, make that the adjustability of test condition is relatively poor, the consistance of data is also lower.With steel cylinder simulation combination gas be that the method for testing of source of the gas has that condition is controlled, advantages such as convenient test, with low cost, high conformity, obtained more application in the foundational development stage of cleaning catalyst for tail gases of automobiles.Patent CN 101138702A and CN 1875365A disclose similar simulated testing system.But, the air-fuel ratio fluctuation in the tail gas that such simulated testing system brings under can't the simulated automotive engine behavior, therefore still not high to the performance test accuracy of cleaning catalyst for tail gases of automobiles, can't obtain the most authentic and valid test data.
Summary of the invention
Air-fuel ratio fluctuation in the tail gas that the objective of the invention is to bring under can't the simulated automotive engine behavior at existing cleaning catalyst for tail gases of automobiles Performance Test System, cause the not high problem of test accuracy thus, provide a kind of can simulated automotive tail gas air-fuel ratio the fluctuation operating mode, can obtain the cleaning catalyst for tail gases of automobiles Performance Test System of test data more accurately and effectively thus.
Cleaning catalyst for tail gases of automobiles Performance Test System provided by the invention comprises distribution subsystem, reaction subsystem and communication subsystem; Described reaction subsystem comprises reacting furnace, and this reacting furnace is used to hold cleaning catalyst for tail gases of automobiles; Described distribution subsystem is used for providing first gas and second gas to reacting furnace, and makes described first gas and second gas alternately be input in the reacting furnace with fixing separately speed and with predetermined alternate cycle.
Cleaning catalyst for tail gases of automobiles Performance Test System provided by the invention has been introduced two-way concussion gas in the reacting furnace of reaction subsystem, and make two-way concussion gas alternately be input to reacting furnace with fixing separately speed and with predetermined alternate cycle, the feasible air-fuel ratio that enters the gas of reacting furnace of alternately input of two-way concussion gas does not remain unchanged, but formed the fluctuation of certain frequency, simulated the air-fuel ratio fluctuation of the tail gas that causes under the motor car engine duty truly, make the performance test accurate and effective more of cleaning catalyst for tail gases of automobiles, can be so that screen cleaning catalyst for tail gases of automobiles efficiently rapidly and accurately.
Description of drawings
Fig. 1 is the structural drawing of cleaning catalyst for tail gases of automobiles Performance Test System provided by the invention.
Embodiment
Below in conjunction with accompanying drawing cleaning catalyst for tail gases of automobiles Performance Test System provided by the invention is described in further detail.
Cleaning catalyst for tail gases of automobiles Performance Test System provided by the invention comprises distribution subsystem 40, reaction subsystem 50 and communication subsystem 60; Described reaction subsystem 50 comprises reacting furnace 19, and this reacting furnace 19 is used to hold cleaning catalyst for tail gases of automobiles 21; Described distribution subsystem 40 is used for providing first gas 8 and second gas 9 to reacting furnace 19, and makes described first gas 8 and second gas 9 alternately be input in the reacting furnace 19 with fixing separately speed and with predetermined alternate cycle.
As shown in Figure 1, cleaning catalyst for tail gases of automobiles Performance Test System provided by the invention comprises distribution subsystem 40, reaction subsystem 50 and 60 3 subsystems of communication subsystem.Reacting furnace 19 in the reaction subsystem 50 is used to hold cleaning catalyst for tail gases of automobiles 21, and the reacting gas 2,3,4 that is used for the simulated automotive exhaust gas component mixes the back and enters reaction subsystem 50 by gas nozzle 14.According to test macro of the present invention, also provide first gas 8 and second gas 9 to enter reaction subsystem 50 by gas nozzle 15, the reacting gas 2,3,4 and first gas 8 and second gas 9 enter into reacting furnace 19 after mix reacting furnace 19 porch, with cleaning catalyst for tail gases of automobiles 21 contact reactions.The flow rate of first gas 8 and second gas 9 can preestablish, and first gas 8 and second gas 9 is set at predetermined alternate cycle alternately inputs to reacting furnace 19, described first gas 8 is oxidizing gas, for example be oxygen, and second gas 9 is reducibility gas, for example the mixed gas of hydrogen or carbon monoxide and hydrogen.The alternately input of described two-way concussion gas can constantly change the air-fuel ratio of reacting gas, facilitates the air-fuel ratio fluctuation operating mode of reacting gas thus.Generally, the scope of described predetermined alternate cycle is 0.1-20 second, under the preferable case, described predetermined alternate cycle is set at 2 seconds, and the semiperiod is only imported first gas 8 before making, then the semiperiod is only imported second gas 9, otherwise or.
Described distribution subsystem 40 comprises first gas source 38 that is provided with first flow operation valve 7 and second gas source 39 that is provided with second flowrate control valve 6, described first gas source 38 and second gas source 39 are connected to reacting furnace 19 porch respectively, and being used for provides first gas 8 and second gas 9 to reacting furnace 19 respectively; Described communication subsystem 60 comprises air-fuel ratio control module 33, this air-fuel ratio control module 33 is connected with second flowrate control valve 6 with described first flow operation valve 7, be used to control first flow operation valve 7 and 6 switchings of second flowrate control valve, so that first gas 8 and second gas 9 alternately are input in the reacting furnace 19 with fixing separately speed and with predetermined alternate cycle.The described first flow operation valve 7 and second flowrate control valve 6 are for having the solenoid valve of control end, the switching that can directly come control valve by electric signal.Air-fuel ratio control module 33 opens and closes with the electric signal control first flow operation valve 7 and second flowrate control valve 6 according to predefined program, makes win gas 8 and second gas 9 with fixing separately speed and with the alternately input of predetermined alternate cycle.
For remaining on predetermined air-fuel ratio numerical value, the air-fuel ratio of the gas that guarantees to enter reacting furnace 19 fluctuates up and down, to reach waste gas conversion ratio preferably, under the preferable case, in the test macro provided by the invention, described distribution subsystem 40 also comprises the source of oxygen 35 that is provided with oxygen flow operation valve 34, this source of oxygen 35 is connected to reacting furnace 19 porch, is used for providing oxygen 5 to reacting furnace 19; Described reaction subsystem 50 also comprises first air-fuel ratio sensor 18 that is arranged on reacting furnace 19 porch, and this first air-fuel ratio sensor 18 is used for the air-fuel ratio of the gas of detection reaction stove 19 porch, to obtain reacting preceding air-fuel ratio numerical value; Described communication subsystem 60 also comprises air-fuel ratio test cell 32, this air-fuel ratio test cell 32 is connected with described air-fuel ratio control module 33 with described first air-fuel ratio sensor 18, be used to gather the preceding air-fuel ratio numerical value of described reaction, and air-fuel ratio numerical value is sent to described air-fuel ratio control module 33 before the reaction that will collect; Described air-fuel ratio control module 33 also is connected with described oxygen flow operation valve 34, also is used for air-fuel ratio numerical value before the described reaction and predetermined air-fuel ratio numerical value are compared, and controls the switching of oxygen flow operation valve 34 according to comparative result.
Described oxygen flow operation valve 34 is for having the solenoid valve of control end, the switching that can directly come control valve by electric signal.Preestablished predetermined air-fuel ratio numerical value in the described air-fuel ratio control module 33, control the switching of oxygen flow operation valve 34 according to the comparative result of air-fuel ratio numerical value and predetermined air-fuel ratio numerical value before the reaction, the air-fuel ratio that enters the gas of reacting furnace 19 with assurance remains on predetermined air-fuel ratio numerical value and fluctuates up and down.
When the air-fuel ratio in the vehicle exhaust reached ideal value 14.7, the waste gas conversion ratio in the vehicle exhaust was best, for conventionally known to one of skill in the art.In order to keep preferable waste gas conversion ratio, the scope of described predetermined air-fuel ratio numerical value is 10-20.Under the preferable case, described predetermined air-fuel ratio numerical value is 14.7.
The decline of the transformation efficiency of the cleaning catalyst for tail gases of automobiles that brings for the air-fuel ratio fluctuation that relaxes in the motor exhaust, present cleaning catalyst for tail gases of automobiles all has certain oxygen storage capacity, and this oxygen storage capacity is a main foundation of judging that cleaning catalyst for tail gases of automobiles lost efficacy.Oxygen storage capacity for testing automobile tai-gas clean-up catalyst 21, need compare the air-fuel ratio of gas before reacting and the air-fuel ratio of reaction back gas, calculate the oxygen storage capacity of tai-gas clean-up catalyst by the amplitude of variation of air-fuel ratio numerical value before the reaction in the comparison predetermined amount of time and reaction back air-fuel ratio numerical value, and then the oxygen storage capacity of judgement tai-gas clean-up catalyst, for conventionally known to one of skill in the art.
In order to judge the oxygen storage capacity of tai-gas clean-up catalyst, under the preferable case, in the cleaning catalyst for tail gases of automobiles Performance Test System provided by the invention, described reaction subsystem 50 also comprises second air-fuel ratio sensor 20, this second air-fuel ratio sensor 20 is arranged on an end that enters the mouth with respect to reacting furnace 19 in the described reacting furnace 19, the air-fuel ratio that is used for the gas after the detection reaction is to obtain reacting back air-fuel ratio numerical value; Described air-fuel ratio test cell 32 also is connected with described second air-fuel ratio sensor 20, also is used to gather described reaction back air-fuel ratio numerical value and air-fuel ratio numerical value after the reaction that collects in air-fuel ratio numerical value and the predetermined amount of time before the reaction that collects in the predetermined amount of time is compared to obtain the rate of change of air-fuel ratio numerical value.
As shown in Figure 1, first air-fuel ratio sensor 18 is arranged on reacting furnace 19 porch, is used to gather the air-fuel ratio of the preceding gas of reaction.Because the alternately input of first gas 8 and second gas 9, make the air-fuel ratio of gas of reacting furnace 19 porch with certain frequency jitter, and have certain fluctuation amplitude.Because purifying vehicle exhaust catalyst converter 21 has certain oxygen storage capacity, the air-fuel ratio fluctuation amplitude of gas can diminish after the reaction that obtains after the reacting gas of input reacting furnace 19 and purifying vehicle exhaust catalyst converter 21 contact reactions, and the fluctuation amplitude of reaction back gas is more little, then the oxygen storage capacity of this cleaning catalyst for tail gases of automobiles is just big more, oxygen storage capacity is just strong more, for conventionally known to one of skill in the art.Can judge the oxygen storage capacity of this cleaning catalyst for tail gases of automobiles by the ratio of gas pulsation amplitude before calculating reaction back gas pulsation amplitude and reacting.If reaction back gas is stable state, fluctuation amplitude is zero, and then described ratio is zero, if reaction back gas pulsation amplitude is constant, then described ratio is 1.Generally, this ratio is between 0 to 1, and this ratio has promptly been represented the rate of change of the air-fuel ratio numerical value of reacting gas.Therefore, as long as can access the air-fuel ratio numerical value change rate of reacting gas, just can judge the oxygen storage capacity of cleaning catalyst for tail gases of automobiles.
Therefore, in the test macro provided by the invention, air-fuel ratio test cell 32 in the communication subsystem 60 is gathered preceding air-fuel ratio numerical value of reaction and reaction back air-fuel ratio numerical value, and, air-fuel ratio numerical value after the reaction that collects in air-fuel ratio numerical value and the predetermined amount of time before the reaction that collects in the predetermined amount of time is compared to obtain the rate of change of air-fuel ratio numerical value according to predefined program.In order to calculate accurately, described predetermined amount of time is a 5-100 predetermined alternate cycle.
Described distribution subsystem 40 also is used to provide balanced gas 1 to described reaction subsystem 50, described reaction subsystem 50 also comprises the preheating device that is connected to reacting furnace 19 porch, this preheating device is used to import the balanced gas 1 from the distribution subsystem, and the balanced gas after the preheating 36 is outputed to reacting furnace 19.
Participate in reaction in the reacting furnace 19 in order to provide the cleaning catalyst for tail gases of automobiles reaction required atmosphere, a certain amount of water vapour need to be injected into, for conventionally known to one of skill in the art.Thus, the balanced gas 1 that distribution subsystem 40 also will carry liquid is injected into preheating device by balanced gas nozzle 25, by preheating device described liquid is gasified, and then the balanced gas after the preheating 1 is outputed to reacting furnace 19 again.Described balanced gas 1 is a nitrogen, and its entrained liquid is water, ethanol or ammoniacal liquor.
Described preheating device comprises preheating furnace 11 and the preheating boiler tube 13 that is arranged in the preheating furnace 11, is filled with preheating filler 12 in the preheating boiler tube 13, and described balanced gas 1 is preheated by carrying out heat interchange with preheating filler 12 in preheating boiler tube 13.Described preheating boiler tube 13 is stainless steel, quartz or other heat-and corrosion-resistant material, and described preheating filler 12 is a honeycomb ceramic heat accumulator, also can be the inert material of heat-and corrosion-resistants such as common cullet or broken ceramics.
For the working temperature of tai-gas clean-up catalyst in the simulated automotive actual motion preferably, need control the temperature of reaction of reacting furnace 19 and the preheat temperature of preheating furnace 11, make it remain predefined temperature value.Therefore, in the test macro provided by the invention, described reaction subsystem 50 also comprises primary heater 26, well heater 27 and temperature sensor 28, described primary heater 26 and well heater 27 are installed in respectively on described preheating furnace 11 and the described reacting furnace 19, be respectively applied for preheating furnace 11 and reacting furnace 19 are heated, described temperature sensor 28 is arranged on reacting furnace 19 porch, and the temperature of gas that is used for detection reaction stove 19 porch is with gas temperature value before obtaining reacting; Described communication subsystem 60 also comprises interconnective temperature test unit 29 and temperature control unit 30, described temperature test unit 29 is connected with described temperature sensor 28, be used to gather the preceding gas temperature value of described reaction, and the gas temperature value sends to temperature control unit 30 before the reaction that will collect, described temperature control unit 30 is connected with well heater 27 with described primary heater 26, be used for gas temperature value and predetermined temperature value before the described reaction are compared, and control the heating power of primary heater 26 and well heater 27 according to comparative result.Described primary heater 26 and well heater 27 are the electric heater that can pass through the control break heating power of electric signal arbitrarily.The working temperature of tai-gas clean-up catalyst when preestablishing the automobile actual motion in the described temperature control unit 30, generally, the scope of described predetermined temperature value is 50-1250 degree centigrade.
Pollutants such as the carbon monoxide in the vehicle exhaust, hydrocarbon, oxynitrides are converted into the major function that carbon dioxide, water and nitrogen are cleaning catalyst for tail gases of automobiles 21.Transformation efficiency for pollutant described in 21 pairs of reacting gas of testing automobile tai-gas clean-up catalyst, in the test macro provided by the invention, described reaction subsystem 50 also comprises first sampling probe 17 and second sampling probe 24, described first sampling probe 17 is arranged on described reacting furnace 19 porch, described second sampling probe 24 is arranged on an end that enters the mouth with respect to reacting furnace 19 in the described reacting furnace 19, described first sampling probe 17 and second sampling probe 24 are respectively applied for the gas concentration and the reacted gas concentration of detection reaction stove 19 porch, to obtain reacting preceding gas concentration value and reaction back gas concentration value; Described communication subsystem 60 also comprises gas analysis unit 31, this gas analysis unit 31 is connected with second sampling probe 24 with described first sampling probe 17, be used to gather gas concentration value and reaction back gas concentration value before the described reaction, and will react before after gas concentration value and the reaction gas concentration value compare to obtain the conversion ratio of reacting gas.
Below the process that adopts test macro provided by the invention to carry out the test of cleaning catalyst for tail gases of automobiles oxygen storage capacity is described.
At first the cleaning catalyst for tail gases of automobiles 21 of well cutting is put into the assigned address of reacting furnace 19.Open distribution subsystem 40, reacting gas 2,3,4 is incorporated in the reacting furnace 19, air-fuel ratio control module 33 in the distribution subsystem 40 is according to the switching parameter of the predefined programmed control first flow operation valve 7 and second flowrate control valve 6, and win gas 8 and second gas 9 alternately are input in the reacting furnace 19 with fixing separately speed and with predetermined alternate cycle.Afterwards, open reaction subsystem 50 and communication subsystem 60, gas temperature value before temperature test unit 29 test reactions in the communication subsystem 60, temperature control unit 30 is according to predefined program, the heating power of control heater 27 and primary heater 26, the reacting furnace 19 in the feasible reaction subsystem 50 and the temperature of preheating furnace 11 are warmed up to the working temperature of tai-gas clean-up catalyst in the automobile actual motion with predetermined programming rate, and remain on described working temperature with predefined temperature retention time after rising to described working temperature.Balanced gas 1 enters reacting furnace 19 after by preheating furnace 11 preheatings.Air-fuel ratio control module 33 in the communication subsystem 60 makes the air-fuel ratio of the preceding gas of reaction remain near the fluctuation of optimal air-fuel ratio also according to the switching parameter of predefined programmed control oxygen flow operation valve 34.Air-fuel ratio test cell 32 in the communication subsystem 60 is gathered preceding air-fuel ratio of reaction and reaction back air-fuel ratio, obtain reacting preceding air-fuel ratio fluctuation amplitude and reaction back air-fuel ratio fluctuation amplitude by air-fuel ratio numerical value before the reaction that collects in the predetermined amount of time and reaction back air-fuel ratio numerical value, judge the oxygen storage capacity size of catalyzer by judging reaction amplitude of variation preceding and reaction back air-fuel ratio fluctuation amplitude, the amplitude variations amplitude is big more, judge catalyzer to go out the oxygen amount big more, otherwise then more little.
Adopt the quick aging that test macro provided by the invention can also the simulated automotive tai-gas clean-up catalyst, below the process that adopts test macro provided by the invention to carry out cleaning catalyst for tail gases of automobiles storage simulation quick aging is described.
At first the cleaning catalyst for tail gases of automobiles 21 of well cutting is put into the assigned address of reacting furnace 19.Open distribution subsystem 40, reacting gas 2,3,4 is incorporated in the reacting furnace 19, air-fuel ratio control module 33 in the distribution subsystem 40 is according to the switching parameter of the predefined programmed control first flow operation valve 7 and second flowrate control valve 6, and win gas 8 and second gas 9 alternately are input in the reacting furnace 19 with fixing separately speed and with predetermined alternate cycle.Afterwards, open reaction subsystem 50 and communication subsystem 60, gas temperature value before temperature test unit 29 test reactions in the communication subsystem 60, temperature control unit 30 is according to predefined program, the heating power of control heater 27 and primary heater 26, the reacting furnace 19 in the feasible reaction subsystem 50 and the temperature of preheating furnace 11 are warmed up to the required high temperature of catalyzer quick aging with predetermined programming rate, and remain on described high temperature according to the aging degree of catalyzer needs with predefined temperature retention time after rising to described high temperature.Balanced gas 1 enters reacting furnace 19 after by preheating furnace 11 preheatings.Gas analysis unit 31 in the communication subsystem 60 is gathered preceding gas concentration value of reaction and reaction back gas concentration value, calculates the conversion ratio of reacting gas according to predefined program.Can judge the permanance of tai-gas clean-up catalyst by calculating the high temperature of simulating quick aging setting conversion ratio following and temperature retention time afterreaction gas, conversion ratio is high more, and the permanance of catalyzer is good more, otherwise poor more.
Adopt the air-fuel ratio fluctuation of the tail gas that cleaning catalyst for tail gases of automobiles Performance Test System provided by the invention causes under the simulated automotive engine behavior truly, make the performance test accurate and effective more of cleaning catalyst for tail gases of automobiles, and test macro of the present invention not only can be realized tests such as conventional vehicle exhaust transformation efficiency, catalyzer ignition performance, catalyzer air speed performance, can also realize the reserves test of tai-gas clean-up catalyst, and quick aging that can the simulated exhaust gas cleaning catalyst, the permanance of test tai-gas clean-up catalyst.
Test macro provided by the invention is not limited to functions such as catalyzer ignition performance, air-fuel ratio performance, air speed performance, the test of catalyzer oxygen storage capacity and simulation quick aging, the user can be according to the actual requirements, in the range of control of test macro provided by the invention, parameters such as flexible reacting gas flow velocity, catalyst inlet temperature, air-fuel ratio fluctuation amplitude, frequency are carried out other performance evaluation to catalyzer.
Claims (13)
1. cleaning catalyst for tail gases of automobiles Performance Test System, this test macro comprise distribution subsystem (40), reaction subsystem (50) and communication subsystem (60); Described reaction subsystem (50) comprises reacting furnace (19), and this reacting furnace (19) is used to hold cleaning catalyst for tail gases of automobiles (21); Wherein, described distribution subsystem (40) is used for providing first gas (8) and second gas (9) to reacting furnace (19), and makes described first gas (8) and second gas (9) alternately be input in the reacting furnace (19) with fixing separately speed and with predetermined alternate cycle.
2. test macro according to claim 1, wherein, described first gas (8) is oxygen, described second gas (9) is the mixed gas of hydrogen or carbon monoxide and hydrogen.
3. test macro according to claim 1, wherein, the scope of described predetermined alternate cycle is 0.1-20 second.
4. test macro according to claim 1, wherein, described distribution subsystem (40) comprises first gas source (38) that is provided with first flow operation valve (7) and second gas source (39) that is provided with second flowrate control valve (6), described first gas source (38) and second gas source (39) are connected to described reacting furnace (19) porch respectively, and being used for provides described first gas (8) and second gas (9) to reacting furnace (19) respectively;
Described communication subsystem (60) comprises air-fuel ratio control module (33), this air-fuel ratio control module (33) is connected with second flowrate control valve (6) with described first flow operation valve (7), be used to control first flow operation valve (7) and second flowrate control valve (6) and open and close, so that described first gas (8) and second gas (9) alternately are input in the reacting furnace (19) with fixing separately speed and with predetermined alternate cycle.
5. test macro according to claim 4, wherein, described distribution subsystem (40) also comprises the source of oxygen (35) that is provided with oxygen flow operation valve (34), and this source of oxygen (35) is connected to reacting furnace (19) porch, is used for providing oxygen (5) to reacting furnace (19);
Described reaction subsystem (50) also comprises first air-fuel ratio sensor (18) that is arranged on reacting furnace (19) porch, and this first air-fuel ratio sensor (18) is used for the air-fuel ratio of the gas of detection reaction stove (19) porch, to obtain reacting preceding air-fuel ratio numerical value;
Described communication subsystem (60) also comprises air-fuel ratio test cell (32), this air-fuel ratio test cell (32) is connected with described air-fuel ratio control module (33) with described first air-fuel ratio sensor (18), be used to gather the preceding air-fuel ratio numerical value of described reaction, and air-fuel ratio numerical value is sent to described air-fuel ratio control module (33) before the reaction that will collect;
Described air-fuel ratio control module (33) also is connected with described oxygen flow operation valve (34), also is used for air-fuel ratio numerical value before the described reaction and predetermined air-fuel ratio numerical value are compared, and controls the switching of oxygen flow operation valve (34) according to comparative result.
6. test macro according to claim 5, wherein, the scope of described predetermined air-fuel ratio numerical value is 10-20.
7. test macro according to claim 5, wherein, described reaction subsystem (50) also comprises second air-fuel ratio sensor (20), this second air-fuel ratio sensor (20) is arranged on an end that enters the mouth with respect to reacting furnace (19) in the described reacting furnace (19), the air-fuel ratio that is used for the gas after the detection reaction is to obtain reacting back air-fuel ratio numerical value;
Described air-fuel ratio test cell (32) also is connected with described second air-fuel ratio sensor (20), also is used to gather described reaction back air-fuel ratio numerical value and air-fuel ratio numerical value after the reaction that collects in air-fuel ratio numerical value and the predetermined amount of time before the reaction that collects in the predetermined amount of time is compared to obtain the rate of change of air-fuel ratio numerical value.
8. test macro according to claim 7, wherein, described predetermined amount of time is a 5-100 predetermined alternate cycle.
9. test macro according to claim 7, wherein, described distribution subsystem (40) also is used to provide balanced gas (1) to described reaction subsystem (50), described reaction subsystem (50) also comprises the preheating device that is connected to described reacting furnace (19) porch, this preheating device is used to import the balanced gas (1) from the distribution subsystem, and the balanced gas after the preheating (36) is outputed to reacting furnace (19).
10. test macro according to claim 9, wherein, described preheating device comprises preheating furnace (11) and is arranged on the interior preheating boiler tube (13) of preheating furnace (11), be filled with preheating filler (12) in this preheating boiler tube (13), described balanced gas (1) is preheated by carrying out heat interchange with preheating filler (12) in preheating boiler tube (13).
11. test macro according to claim 10, wherein, described reaction subsystem (50) also comprises primary heater (26), well heater (27) and temperature sensor (28), described primary heater (26) and well heater (27) are installed in respectively on described preheating furnace (11) and the reacting furnace (19), be respectively applied for preheating furnace (11) and reacting furnace (19) are heated, described temperature sensor (28) is arranged on reacting furnace (19) porch, and the temperature of gas that is used for detection reaction stove (19) porch is with gas temperature value before obtaining reacting;
Described communication subsystem (60) also comprises interconnective temperature test unit (29) and temperature control unit (30), described temperature test unit (29) is connected with described temperature sensor (28), be used to gather the preceding gas temperature value of described reaction, and the gas temperature value sends to temperature control unit (30) before the reaction that will collect, described temperature control unit (30) is connected with well heater (27) with described primary heater (26), be used for gas temperature value and predetermined temperature value before the described reaction are compared, and control the heating power of primary heater (26) and well heater (27) according to comparative result.
12. test macro according to claim 11, the scope of wherein said predetermined temperature value are 50-1250 degree centigrade.
13. test macro according to claim 11, wherein said reaction subsystem (50) also comprises first sampling probe (17) and second sampling probe (24), described first sampling probe (17) is arranged on described reacting furnace (19) porch, described second sampling probe (24) is arranged on an end that enters the mouth with respect to reacting furnace (19) in the described reacting furnace (19), described first sampling probe (17) and second sampling probe (24) are respectively applied for the gas concentration and the reacted gas concentration of detection reaction stove (19) porch, to obtain reacting preceding gas concentration value and reaction back gas concentration value;
Described communication subsystem (60) also comprises gas analysis unit (31), this gas analysis unit (31) is connected with second sampling probe (24) with described first sampling probe (17), be used to gather gas concentration value and reaction back gas concentration value before the described reaction, and will react before after gas concentration value and the reaction gas concentration value compare to obtain the conversion ratio of reacting gas.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910259956.2A CN102109507B (en) | 2009-12-23 | 2009-12-23 | Performance testing system for automotive exhaust cleaning catalyst |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910259956.2A CN102109507B (en) | 2009-12-23 | 2009-12-23 | Performance testing system for automotive exhaust cleaning catalyst |
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| CN102109507A true CN102109507A (en) | 2011-06-29 |
| CN102109507B CN102109507B (en) | 2014-08-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590537A (en) * | 2012-02-29 | 2012-07-18 | 福州大学 | System for evaluating catalyst and material |
| CN103590879A (en) * | 2013-11-29 | 2014-02-19 | 长城汽车股份有限公司 | System and method for testing exhaust aftertreatment |
| CN105067551A (en) * | 2015-07-09 | 2015-11-18 | 无锡威孚环保催化剂有限公司 | Fourier infrared automobile exhaust evaluation system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101138702A (en) * | 2007-06-15 | 2008-03-12 | 天津内燃机研究所 | Engine vent gas catalytic cleaner activation evaluating system |
| CN101466457A (en) * | 2006-06-13 | 2009-06-24 | 丰田自动车株式会社 | Catalyst for purification of exhaust gas |
-
2009
- 2009-12-23 CN CN200910259956.2A patent/CN102109507B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101466457A (en) * | 2006-06-13 | 2009-06-24 | 丰田自动车株式会社 | Catalyst for purification of exhaust gas |
| CN101138702A (en) * | 2007-06-15 | 2008-03-12 | 天津内燃机研究所 | Engine vent gas catalytic cleaner activation evaluating system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102590537A (en) * | 2012-02-29 | 2012-07-18 | 福州大学 | System for evaluating catalyst and material |
| CN103590879A (en) * | 2013-11-29 | 2014-02-19 | 长城汽车股份有限公司 | System and method for testing exhaust aftertreatment |
| CN105067551A (en) * | 2015-07-09 | 2015-11-18 | 无锡威孚环保催化剂有限公司 | Fourier infrared automobile exhaust evaluation system |
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| Publication number | Publication date |
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| CN102109507B (en) | 2014-08-13 |
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