CN101281153B - Air/fuel ratio oxygen sensor performance measuring system - Google Patents
Air/fuel ratio oxygen sensor performance measuring systemDownload PDFInfo
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- CN101281153B CN101281153BCN2008100616696ACN200810061669ACN101281153BCN 101281153 BCN101281153 BCN 101281153BCN 2008100616696 ACN2008100616696 ACN 2008100616696ACN 200810061669 ACN200810061669 ACN 200810061669ACN 101281153 BCN101281153 BCN 101281153B
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Abstract
Translated fromChinese
Description
Technical field
The present invention is specifically related to a kind of automobile air/fuel ratio oxygen sensor performance measuring system.
Background technology
In motor car engine three-element catalytic electric spray control system, lambda sensor mainly is to have utilized it after the motor car engine burning as an important devices in this control system, and producing dense combustion is that sky is so than λ＜1; Producing lean-burn is that sky is so than the characteristic of exporting high low-voltage under the situation of λ＞1 respectively, and then by motor car engine three-element catalytic electric spray control system, ECU, accept this voltage signal, realization is to the judgement of engine combustion situation, thereby the control air inflow of engine and the rational proportion of distributive value are desirable empty so than near, the mobile equilibrium of fluctuation control λ=1 to realize that the engine combustion situation is centered around.Therefore this just requires and must test the following technical parameter of lambda sensor: 1, the output voltage of lambda sensor under different combustion positions, mainly comprise dense combustion situation, high output voltage value under λ＜1 and lean-burn situation, the low output voltage value under λ＞1; 2, the response time, the lambda sensor output voltage transforms to the required decline response time t of low level from high level when comprising the engine combustion situation by R-LDownValue and combustion position during by L-R the lambda sensor output voltage transform to the required rising response time t of high level from low levelUpValue.Otherwise the difference of oxygen sensor performance can directly influence the matching effect of Exhaust Control of Engine.Therefore, along with a large amount of productions, the user demand of lambda sensor, press for the device that energy of exploitation is accurately tested, compared the oxygen sensor in use for car performance at auto industry field.
The device of test oxygen sensor performance mostly is based upon on the basis of using automobile or engine pedestal at present, prepares the tail gas of different combustion positions by the burning of engine.Because the fuel that adopts is liquid fuel, a plurality of links such as fuel supply will passing through pump oil, oil transportation, oil atomizing, vaporization mix, especially oil atomizing, vaporization is mixed needs the regular hour, be not easy to change rapidly the concentration of mixed air, realize the sudden change of combustion position in the tail gas, be unfavorable for the measurement of lambda sensor dynamic response characteristic.In addition, the exhaust temperature fluctuation that this device produces is very big, also is unfavorable for the accurate measurement of lambda sensor characteristic.And, the structure more complicated of this device, cost is not low yet.For this reason, also the someone has adopted gaseous state CxHy fuel to substitute the way of fuel oil, utilize gas control valve to realize quantitative CxHy and Air mixing proportioning, after burning, produced the tail gas of the dense rare variation of combustion position, tentatively simulated the variation in combustion of motor car engine reality, test provides preliminary test condition to oxygen sensor performance, but want comprehensively, accurately estimate every performance of oxygen sensor in use for car, particularly under the hot conditions, as 800 ℃, the measurement of Millisecond response speed, this not only requires to provide the tail gas of test usefulness to have dense rare variation, also need consider the stability of its state, the convenience of dense rare variation control, tail gas changes the agility of transmitting and providing of required high-temperature tail gas is provided.And present oxygen sensor performance measuring device or complex structure, cost an arm and a leg, maybe can not make things convenient for, estimate accurately, all sidedly the performance of lambda sensor.The present invention proposes air/fuel ratio oxygen sensor performance measuring system after having analyzed various shortcoming of the prior art.
Summary of the invention
Technical matters to be solved by this invention is the present situation at prior art, provides a kind of working signal to stablize, can detect the air/fuel ratio oxygen sensor performance measuring system that the oxygen concentration scope is big, technology realizes large-scale industrialization production simply, easily.
The technical solution adopted in the present invention is: air/fuel ratio oxygen sensor performance measuring system, comprise air distributing device, burner, attemperating unit and proving installation, and wherein: burner has heating furnace; One end of heating furnace is connected with burning chamber; The other end of heating furnace is connected with measures the chamber; Measure the proving installation that the chamber is connected with oxygen concentration in the described burner of energy measurement; Measure the attemperating unit that the chamber is connected with energy measurement and controls cavity temperature in the heating furnace; The inlet end of burning chamber is connected with air distributing device, and described heating furnace inside surface of side wall is provided with the insulation layer; Described insulation layer inboard is provided with ceramic body, and described ceramic body inside is embedded with resistance wire; One end of the gas access of described burning chamber is equipped with flame gun; The sidewall in described measurement chamber runs through and is shaped at least one measured hole; Be provided with the porcelain inner bag in the sidewall of described burning chamber week; Described measurement chamber sidewall be provided with the insulation layer interior week, described air distributing device comprises combustion gas configuration-system and air configuration-system, described air configuration-system has compressed air tank; Described compressed air tank is connected with an end of second reduction valve; The other end of described second reduction valve is connected with an end of oil-water separator; The other end of described oil-water separator is connected with the inlet end of T-valve; First outlet side of described T-valve is connected with primary air duct; Second outlet side of described T-valve is connected with the make-up air path.
For optimizing technique scheme, the technical measures of taking also comprise:
The combustion gas configuration-system has the end that gas tank is connected with first reduction valve; The other end of first reduction valve is connected with the inlet end of gas conduct pipe; The outlet side of gas conduct pipe is connected with flame gun; First glass rotameter of energy test gas flow is installed on the gas conduct pipe.
Primary air duct comprises the main air conduit and second glass rotameter; First outlet side of T-valve is connected with the inlet end of main air conduit; The outlet side of main air conduit is connected with flame gun.
The make-up air path comprises make-up air conduit, the 3rd glass rotameter, solenoid valve and tonifying Qi pipeline; Second outlet side of T-valve is connected with the inlet end of make-up air conduit; The outlet side of make-up air conduit is connected with the tonifying Qi pipeline, and the tonifying Qi pipeline runs through the inlet end that is installed in burning chamber; Solenoid valve is connected with proving installation, and the electric signal that energy tested person device is sent is controlled.
Proving installation comprises at least one lambda sensor, computing machine, data bus connection, data collecting card, power supply and signal wire; Lambda sensor runs through and is arranged in the measured hole; Computing machine is connected with data bus connection; Data bus connection also is connected with data collecting card; Lambda sensor is passed to signal by signal wire can be to carrying out adaptive data collecting card between computing machine and the lambda sensor; Data collecting card also is connected with solenoid valve.
Attemperating unit comprises first temperature thermocouple, second temperature thermocouple, temperature controller and switch; First temperature thermocouple runs through the sidewall that is arranged on the measurement chamber; Second temperature thermocouple runs through the sidewall that is arranged on heating furnace; Temperature controller can read the electric signal of first temperature thermocouple and second temperature thermocouple, and it can be controlled the heating of resistance wire; Temperature controller is connected with switch; Switch can switch the circuit turn-on state between first temperature thermocouple and second temperature thermocouple.Measure the chamber free end and be shaped on the smoke evacuation tube; Burning chamber is equipped with sight glass.
Compared with prior art, effect of the present invention is: the present invention mainly is made up of air distributing device, burner, attemperating unit, four functional blocks of proving installation; Wherein air distributing device has been realized the rational proportion of flammable CxHy gas and air by the control of three tunnel gas circuits; Burner then is made up of burning chamber, heating furnace, measurement chamber three parts, and wherein burning chamber is used to produce the tail gas of different fired states, and heating furnace is heated to tail gas and measures required temperature, and then lay for tested lambda sensor provides in the measurement chamber, the measured place.Attemperating unit then realizes measuring the temperature control of tail gas.Proving installation is then realized the automatic control of proportioning gaseous combustion state exchange and test, the record of the every performance data of oxygen sensor in use for car by the oxygen sensor in use for car testing system software of computing machine, data collecting card, special exploitation.Its beneficial effect is:
1. the gasoline combustion with flammable CxHy gas instead liquid state generates tail gas, and links such as pump oil complicated in the oil piping system of simulated automotive engine, oil transportation, oil atomizing, mixing are simplified.
2. owing to adopted the distribution design of three gas circuits, only need the break-make of control compensation air flue just can realize that the dense rare situation of combustion tail gas changes easily and efficiently.And this gas circuit is designed to flow directly into burning chamber by the tonifying Qi pipeline separately, is superimposed upon on the tail gas state of burning, has overcome near the effect of blocking up of the burning gases path flame gun head, has realized the stable control of exhaust combustion state.
3. the design of the straight-through connected mode in burning chamber, heating furnace, measurement chamber in the burner is guaranteed the unimpeded of tail gas path; The design of two temperature thermocouples can be carried out the control that test macro gives heating easily, and the insulation of the gap phase of in use stopping using, convenience is provided and has saved fuel for starting fast to measure.Skin at burner has all used insulation material in addition, has guaranteed the realization of high temperature measurement tail gas and the safety of operation.
4. the oxygen sensor in use for car testing system software by computing machine, data collecting card, special exploitation has realized the centralized automatic control of fired state conversion and test, the record of the every performance data of oxygen sensor in use for car.
Description of drawings
The system chart of Fig. 1 embodiment of the invention;
The structural drawing of Fig. 2 embodiment of the invention.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Figure grade explanation: air distributing device 1,burner 2, attemperating unit 3, proving installation 4,gas tank 111,first reduction valve 112,gas conduct pipe 113,first glass rotameter 114,compressed air tank 121,second reduction valve 122, oil-water separator 123, T-valve 124,main air conduit 131,second glass rotameter 132, make-up air conduit 141, the3rd glass rotameter 142,solenoid valve 143,burning chamber 21,heating furnace 22,measure chamber 23,flame gun 211,sight glass 214,burning chamber passage 215, tonifying Qipipeline 212, porcelaininner bag 213,ceramic body 222,resistance wire 223,insulation layer 221,gas passage 224,measure tube wall 231,insulation layer 232,smoke evacuation tube 235, first measuredhole 233, second measuredhole 234,first temperature thermocouple 31,second temperature thermocouple 32,temperature controller 33,switch 34,first lambda sensor 41,second lambda sensor 42,computing machine 43,data bus connection 44,data collecting card 45,power supply 46,signal wire 47.
Fig. 1 is the system chart of the embodiment of the invention, and Fig. 2 is the structural drawing of the embodiment of the invention.
Embodiment: air/fuel ratio oxygen sensor performance measuring system, comprise air distributing device 1,burner 2, attemperating unit 3 and proving installation 4, wherein: burner hasheating furnace 22; One end ofheating furnace 22 is connected withburning chamber 21; The other end ofheating furnace 22 is connected withmeasures chamber 23; Measure the proving installation thatchamber 23 is connected with oxygen concentration in the described burner of energy measurement; Measure the attemperating unit 3 thatchamber 23 is connected with energy measurement and controls cavity temperature in theheating furnace 22; The inlet end ofburning chamber 21 is connected with air distributing device 1.
Air distributing device 1 comprises combustion gas configuration-system and air configuration-system.
The combustion gas configuration-system hasgas tank 111, andgas tank 111 is connected with an end offirst reduction valve 112; The other end offirst reduction valve 112 is connected with the inlet end ofgas conduct pipe 113; The outlet side ofgas conduct pipe 113 is connected withflame gun 211;First glass rotameter 114 of energy test gas flow is installed on thegas conduct pipe 113.
The air configuration-system has compressedair tank 121;Compressed air tank 121 is connected with an end ofsecond reduction valve 122; The other end ofsecond reduction valve 122 is connected with an end of oil-water separator 123; The other end of oil-water separator 123 is connected with the inlet end of T-valve 124; First outlet side of T-valve 124 is connected with primary air duct; Second outlet side of T-valve 124 is connected with the make-up air path.
Primary air duct comprises themain air conduit 131 andsecond glass rotameter 132; First outlet side of T-valve 124 is connected with the inlet end ofmain air conduit 131; The outlet side ofmain air conduit 131 is connected withflame gun 211.
The make-up air path comprises make-up air conduit 141, the3rd glass rotameter 142,solenoid valve 143 and tonifying Qipipeline 212; Second outlet side of T-valve 124 is connected with the inlet end of make-up air conduit 141; The outlet side of make-up air conduit 141 is connected with tonifying Qipipeline 212, and tonifying Qipipeline 212 runs through the inlet end that is installed in burningchamber 21;Solenoid valve 143 is connected with proving installation 4, and the electric signal that energy tested person device 4 is sent is controlled.
Proving installation 4 comprises at least one lambda sensor, and present embodiment is preferably two, i.e.first lambda sensor 41 andsecond lambda sensor 42,computing machine 43,data bus connection 44,data collecting card 45,power supply 46 andsignal wire 47; Lambda sensor runs through and is arranged in the measured hole;Computing machine 43 is connected withdata bus connection 44;Data bus connection 44 also is connected withdata collecting card 45; Lambda sensor is passed to signal bysignal wire 47 can be to carrying out adaptivedata collecting card 45 betweencomputing machine 43 and the lambda sensor;Data collecting card 45 also is connected withsolenoid valve 143.
Attemperating unit 3 comprisesfirst temperature thermocouple 31,second temperature thermocouple 32,temperature controller 33 andswitch 34;First temperature thermocouple 31 runs through the sidewall that is arranged onheating furnace 22;Second temperature thermocouple 32 runs through the sidewall that is arranged onmeasurement chamber 23;Temperature controller 33 can read the electric signal offirst temperature thermocouple 31 andsecond temperature thermocouple 32, and it can be controlled the heating ofresistance wire 223;Temperature controller 33 is connected withswitch 34;Switch 34 can switch the circuit turn-on state betweenfirst temperature thermocouple 31 andsecond temperature thermocouple 32.
As Fig. 1, system for testing performance of oxygen sensor in use for car of the present invention mainly is made up of air distributing device, burner, attemperating unit, four functional modules of proving installation.
Its structure such as Fig. 2: in air distributing device, at first regulate the CxHy airsheds of 113 outflows and the primary air flows thatsecond glass rotameter 132 regulates 131 outflows fromcompressed air tank 121 along main air conduit fromCxHy gas tank 111 along gas conduct pipe byfirst glass rotameter 114, the two is lighted after passing through and being mixed in theflame gun 211 that is installed on theburning chamber 21, inburning chamber 21, produce dense combustion situation, promptly empty right than the tail gas of λ between 0.90 to 0.97; And then regulate fromcompressed air tank 121 along the make-up air conduit the 141 make-up air flows that flow out, and also flow in theburning chamber 21 by another independent tonifying Qipipeline 212 on theburning chamber 21 by the 3rd glass rotameter 142.Solenoid valve 143 is being controlled the break-make of make-up air conduit 141.Whensolenoid valve 143 receives the high level signal of being sent bydata collecting card 45, open make-up air conduit 141, the make-up air that regulates flows in theburning chamber 21 by tonifying Qipipeline 212, be superimposed upon on the combustion position of front, make tail gas by dense combustion situation, be sky so than λ between 0.90 to 0.97, change into the lean-burn situation, promptly sky so than λ between 1.03 to 1.1.Otherwise, whensolenoid valve 143 turn-offs make-up air conduit 141, make tail gas revert to dense combustion situation again by the lean-burn situation.Though we have adopted three gas circuits to carry out distribution, only need the break-make of control compensation air just to realize that the dense rare situation of combustion tail gas changes easily and efficiently here.Yet, in the distribution burner of traditional design, the general mode that adopts a plurality of gas circuits to insert mixed combustion in theflame gun 211 jointly, because the effect of blocking up in flame gun, the change of its certain gas circuit, can produce interference, bring combustion position in range of control, not fluctuate other gas circuit flow.And system of the present invention has adopted the make-up air gas circuit to flow directly into mode in theburning chamber 21 from another independent tonifying Qipipeline 212, has overcome above-mentioned deficiency, has realized the stable control of exhaust combustion state.In order to realize better distribution control, system also uses two reduction valve, i.e.first reduction valve 112,second reduction valve 122, oil-water separator 123 and T-valve 124.During actual the test, CxHy gas can be specially coal gas or rock gas.
Burner is then by mainly being made up of burningchamber 21,heating furnace 22,measurement chamber 23 and annex thereof, wherein burningchamber 21 produces the tail gas of different fired states, 22 in heating furnace is heated to required measurement temperature with tail gas, measures 23 places of laying for tested lambda sensor, chamber.In order to guarantee the unimpeded of tail gas path, three parts have realized straight-through connected mode.
The tail gas that the setting gas of air distributing device output produces after byflame gun 211 mixed combustions entersburning chamber passage 215, and make-up air then also entersburning chamber passage 215 by tonifying Qi pipeline 212.For the heat that keeps combustion tail gas and the safety of device, be provided with the porcelaininner bag 213 of heatproof and insulation atburning chamber passage 215 inwalls.For ease of observing the situation of gaseous combustion intuitively, designedsight glass 214 simultaneously with mica sheet.
After tail gas enters thegas passage 224 of heating furnace at a high speed,, by theresistance wire 223 that is applied in theceramic body 222 it is heated again for reaching the needs that tail gas is in the setting measurement temperature.In order to guarantee to add the demand of thermal effect and special high temperature,design insulation layer 221 in the outside employing of heating furnace alumina fibre material and carried out insulation, at the terminal position place ofgas passage 224 airflow directionsfirst temperature thermocouple 31 has been installed also.
After tail gas after heating flows into and measureschamber 23, can carry out the voltage signal measurement to the lambda sensor that is installed on first measuredhole 233, second measuredhole 234 by measuring system.For guaranteeing that tested two lambda sensors have identical working environment, three-dimensional facade becomes 90 degree adjacent on thetube wall 231 measuring for first measuredhole 233, second measuredhole 234, andsecond temperature thermocouple 32 of knowing clearly is set measuring on the adjacent positions that the three-dimensional facade oftube wall 231 nearlambda sensors 233 become 45 degree; On the shell ofmeasuring tube wall 231, also be provided with insulation layer 232.The length ofsmoke evacuation tube 235 is longer, and its internal diameter makes the exhaust of tail gas Rational flow than measuring the little 6mm oftube wall 231 internal diameters, and it is required to the measurement of tail gas to satisfy lambda sensor.
Proving installation hardware is made up ofcomputing machine 43,data bus connection 44,data collecting card 45,first lambda sensor 41 andsecond lambda sensor 42 etc.Software then is the oxygen sensor in use for car testing system software of special exploitation.
The course of work: before the measurement, thetemperature controller 33 in the attemperating unit links to each other withfirst temperature thermocouple 31 byswitch heating furnaces 22 of output power driving resistor silk give heating according to the heating-up temperature of giving that is provided with.Simultaneously every oxygen sensor heater line on first measuredhole 233, second measuredhole 234 is connected with thepower supply 46 of 12V, if be not with the heater-type lambda sensor then not need this step.Thesignal wire 47 of each lambda sensor is connected withdata collecting card 45 respective channel.Whenheating furnace 22 give be heated to setting give heating-up temperature the time, open and configure primary air flow, CxHy airshed, feed in theflame gun 211 and light,temperature controller 33 is converted tosecond temperature thermocouple 32 again and links to each other, and 223 pairs of tail gas of output power driving resistor silk measure temperature and heat according to being provided with, and also realize the measurement to the test chamber actual temperature simultaneously.It is soft to start the oxygen sensor in use for car test macro of developing for native system specially then, appears at test interface." process control " button on the operation interface, " rising " or " decline " the two kinds of processes that realize are selected, 43 in computing machine passes throughdata collecting card 45 output height control level signals, drivesolenoid valve 143, cut-offfing of controlcompensation air conduit 141, make-up air is superimposed upon on the fired state of front, finishes tail gas λ value that burning chamber produces greater than 1 with less than the rapid transformation between 1 two kinds of fired states.Simultaneously, to since the variation of the lambda sensor output voltage signal that brings of tail gas state-transition then gather bydata collecting card 45, be input in thecomputing machine 43, and analyze by voltage measurement module in the oxygen sensor in use for car testing system software of special exploitation and response time measurement module, realize maximum voltage, minimum voltage, rise time, isoparametric measurement fall time, and realize the preservation of above-mentioned measurement data.Measurement to other sensors, after only changing first measuredhole 233, second measured hole, 234 upper sensors, connect corresponding heater line and signal wire, " process control " button on the operation control software interface then, realize " risings " or " decline " two kinds of processes selections, repeat above-mentioned maximum voltage, minimum voltage, rise time, isoparametric measurement fall time and get final product.
Most preferred embodiment of the present invention is illustrated, and various variations or the remodeling made by those of ordinary skills can not depart from the scope of the present invention.
Claims (7)
1. air/fuel ratio oxygen sensor performance measuring system comprises air distributing device (1), burner (2), attemperating unit (3) and proving installation (4), and it is characterized in that: described burner has heating furnace (22); One end of described heating furnace (22) is connected with burning chamber (21); The other end of described heating furnace (22) is connected with measures chamber (23); Described measurement chamber (23) is connected with the proving installation of oxygen concentration in the described burner of energy measurement; Described measurement chamber (23) is connected with energy measurement and controls the attemperating unit (3) of the interior cavity temperature of described heating furnace (22); The inlet end of described burning chamber (21) is connected with described air distributing device (1), and described heating furnace (22) inside surface of side wall is provided with insulation layer (221); Described insulation layer (221) inboard is provided with ceramic body (222), and described ceramic body (222) inside is embedded with resistance wire (223); One end of the gas access of described burning chamber (21) is equipped with flame gun (211); The sidewall in described measurement chamber (23) runs through and is shaped at least one measured hole; Be provided with porcelain inner bag (213) in the sidewall of described burning chamber (21) week; Described measurement chamber (23) sidewall be provided with insulation layer (232) interior week, described air distributing device (1) comprises combustion gas configuration-system and air configuration-system, described air configuration-system has compressed air tank (121); Described compressed air tank (121) is connected with an end of second reduction valve (122); The other end of described second reduction valve (122) is connected with an end of oil-water separator (123); The other end of described oil-water separator (123) is connected with the inlet end of T-valve (124); First outlet side of described T-valve (124) is connected with primary air duct; Second outlet side of described T-valve (124) is connected with the make-up air path.
2. air/fuel ratio oxygen sensor performance measuring system according to claim 1 is characterized in that: described combustion gas configuration-system has gas tank (111), and described gas tank (111) is connected with an end of first reduction valve (112); The other end of described first reduction valve (112) is connected with the inlet end of gas conduct pipe (113); The outlet side of described gas conduct pipe (113) is connected with described flame gun (211); First glass rotameter (114) of energy test gas flow is installed on the described gas conduct pipe (113).
3. air/fuel ratio oxygen sensor performance measuring system according to claim 1 is characterized in that: described primary air duct comprises main air conduit (131) and second glass rotameter (132); First outlet side of described T-valve (124) is connected with the inlet end of described main air conduit (131); The outlet side of described main air conduit (131) is connected with described flame gun (211).
4. air/fuel ratio oxygen sensor performance measuring system according to claim 3 is characterized in that: described make-up air path comprises make-up air conduit (141), the 3rd glass rotameter (142), solenoid valve (143) and tonifying Qi pipeline (212); Second outlet side of described T-valve (124) is connected with the inlet end of described make-up air conduit (141); The outlet side of described make-up air conduit (141) is connected with described tonifying Qi pipeline (212), and described tonifying Qi pipeline (212) runs through the inlet end that is installed in described burning chamber (21); Described solenoid valve (143) is connected with described proving installation (4), and the electric signal control that sent by described proving installation (4).
5. air/fuel ratio oxygen sensor performance measuring system according to claim 4 is characterized in that: described proving installation (4) comprises at least one lambda sensor, computing machine (43), data bus connection (44), data collecting card (45), power supply (46) and signal wire (47); Described lambda sensor runs through and is arranged in the described measured hole; Described computing machine (43) is connected with described data bus connection (44); Described data bus connection (44) also is connected with described data collecting card (45); Described lambda sensor is passed to signal by described signal wire (47) can be to carrying out adaptive data collecting card (45) between computing machine (43) and the lambda sensor; Described data collecting card (45) also is connected with described solenoid valve (143).
6. air/fuel ratio oxygen sensor performance measuring system according to claim 5 is characterized in that: described attemperating unit (3) comprises first temperature thermocouple (31), second temperature thermocouple (32), temperature controller (33) and switch (34); Described first temperature thermocouple (31) runs through the sidewall that is arranged on described heating furnace (22); Described second temperature thermocouple (32) runs through the sidewall that is arranged on described measurement chamber (23); Described temperature controller (33) can read the electric signal of described first temperature thermocouple (31) and second temperature thermocouple (32), and it can be controlled the heating of described resistance wire (223); Described temperature controller (33) is connected with described switch (34); Described switch (34) can switch the circuit turn-on state between first temperature thermocouple (31) and second temperature thermocouple (32).
7. air/fuel ratio oxygen sensor performance measuring system according to claim 6 is characterized in that: described measurement chamber (23) free end is shaped on smoke evacuation tube (235); Described burning chamber (21) is equipped with sight glass (214).
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| CN102213705B (en)* | 2010-04-01 | 2016-05-04 | 上海航天汽车机电股份有限公司 | A kind of oxygen sensor performance measuring device of simulated automotive operating mode |
| CN102331481B (en)* | 2010-07-12 | 2015-11-25 | 上海航天汽车机电股份有限公司 | The oxygen sensor performance measuring system of multichannel distribution simulated automotive tail gas environment |
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| 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 |
| CN102928471A (en)* | 2012-06-27 | 2013-02-13 | 苏州工业园区职业技术学院 | Oxygen sensor performance testing device and method |
| CN106766974B (en)* | 2016-12-27 | 2019-04-12 | 华中科技大学 | An air-fuel ratio detection device |
| CN111796051B (en)* | 2020-07-10 | 2022-09-16 | 天津大学 | Flameless combustion self-ignition temperature testing device, system and method |
| CN113109516B (en)* | 2021-04-21 | 2022-04-19 | 江南大学 | A humidity sensor response and recovery time measuring device and method |
| CN118392969B (en)* | 2024-06-25 | 2024-10-11 | 中国第一汽车股份有限公司 | A method and system for fast measurement of steady-state current of high-temperature ceramic oxygen sensor |
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| CN201196631Y (en)* | 2008-05-21 | 2009-02-18 | 宁波大学 | Performance measurement system for air/fuel ratio oxygen sensor |
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| CN101281153A (en) | 2008-10-08 |
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