CN1664539A - Discharge quick simulation tester for cold starting automobile engine of light car - Google Patents
Discharge quick simulation tester for cold starting automobile engine of light car Download PDFInfo
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- CN1664539A CN1664539A CN 200510011513 CN200510011513A CN1664539A CN 1664539 A CN1664539 A CN 1664539A CN 200510011513 CN200510011513 CN 200510011513 CN 200510011513 A CN200510011513 A CN 200510011513A CN 1664539 A CN1664539 A CN 1664539A
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- 238000004088 simulation Methods 0.000 title claims description 17
- 238000001816 cooling Methods 0.000 claims abstract description 67
- 239000002826 coolant Substances 0.000 claims description 33
- 230000003197 catalytic effect Effects 0.000 claims description 26
- 239000010687 lubricating oil Substances 0.000 claims description 24
- 239000003921 oil Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 11
- 239000000498 cooling water Substances 0.000 claims description 10
- 239000010705 motor oil Substances 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000008676 import Effects 0.000 claims description 8
- 238000005057 refrigeration Methods 0.000 claims description 8
- 238000012360 testing method Methods 0.000 abstract description 28
- 230000004936 stimulating effect Effects 0.000 abstract 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000013028 emission testing Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 108010066114 cabin-2 Proteins 0.000 description 5
- 238000011160 research Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000000306 recurrent effect Effects 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The invention relates to a device for stimulating the cool start of the motor of the light vehicle, which applies to the motor platform for stimulating the hub test behavior of the light vehicle III, IV. Said device comprises primarily a cooling cabin, a refrigerating system, a motor intensive fast-cooling apparatus, an electric eddy current dynamometer set outside the cooling cabin, two discharging analyzer and a computer controlling and selecting system. The invention controls the cabin temperature combined with the intensive fast-cooling apparatus, and cools temperature of the motor, post handing system, accessory parts evenly and rapidly, which reduces the preparing time.
Description
Technical field
The present invention relates to cold starting automobile engine of light car exhaust emission testing technology and equipment, belong to the automobile test technical field of measurement and test.
Background technology
In order to reduce auto-pollution thing discharge capacity, various countries are more and more tighter at the Abgasgesetz of motor vehicle.The phase III Abgasgesetz (abbreviation EUROIII Emission Standard) that European Union played execution in 2000 has increased under the light-duty vehicle low temperature emission testing project after the cold start, is used for controlling the discharge capacity of automobile cold start after stain thing in winter.China's standard GB 18352.3 " light-duty vehicle pollutant emission limit and measuring method (III, IV) " also has same regulation.
Light-duty vehicle cold starting emission testing, EUROIII Emission Standard requires automobile to place 12～36 hours (full car is cold) under the environment of-7 ℃ (subzero 7 ℃), immediately under-7 ℃ of environment, automobile in accordance with regulations 4052 meters (780 seconds) of operating mode (15 operating mode) operation on revolving drum test table, the discharge capacity (g/km of unit) of CO (carbon monoxide), HC (hydrocarbon), NOx (oxynitrides) in the while measured automobiles exhaust, whether whether the measured automobiles discharge capacity is in the limit value of regulation, up to standard with the method evaluation motor vehicle emission.Carrying out such test needs special discharged at lower temperature testing laboratory, except the required automobile of needs configuration normal temperature emission testing changes hub test unit and the testing tool, also will have a cover can make the whole test chamber be in the refrigeration system of-7 ℃ of low temperature for a long time.Because the light-duty vehicle that has may reach more than 7 meters, volume is bigger, and therefore, the volume of cold-test chamber must be very big, causes the cost of refrigeration system and operating cost very expensive.
BOSMAL Automotive R﹠amp; The people such as Bielaczyc of D Centre once were placed on car load under outdoor-15 ℃ low temperature environment and soaked car 16 hours, were placed on then on the normal temperature commentaries on classics hub to carry out the cold-starting Study on Emission.This research method has replaced the environmental chamber of low temperature revolving drum test table with extraneous low temperature environment, has saved experimental cost to a certain extent; But still need to adopt expensive revolving drum test table and constant-volume sampling system, parts adjustment difficulty and soak the car time long shortcoming still exist, and its test initial stage Engine Inlet Temperature and cold ambient temperature differ bigger.
Once the method that the hub operating mode is changeed in the simulation on engine pedestal that occurred both at home and abroad has following two kinds: the one, and GM company once adopted computer automatic control system to control simulation of engine FTP-75 operating mode research engine exhaust emission.This system adopts the electric dynamometer of control automatically to simulate the real vehicles action, is equipped with variator, and it is almost completely identical to make engine operational cycle change hub with car load.This analogy method is pressed close to revolving drum test table most, but it involves great expense, and is at normal temperatures---if increase temperature controlling instruments, then the complicacy of its equipment, cost and operating cost be all near revolving drum test table, so seldom adopt in the practical study.The 2nd, steady working condition simulation test research engine exhaust emission at normal temperatures.Method is simple for this, the test condition favorable reproducibility, but can not study engine variable working condition situation, therefore can not react the truth that car load changes the hub process of the test.For example Toyota Motor Corporation adopts three sections analogy method research engine cold starting HC emission performances at normal temperatures.
At this situation, consider that auto-pollution thing discharge capacity is mainly produced by engine, automobile engine of light car is tested on the engine discharge quick simulation tester for cold starting separately, can obtain with above-mentioned low temperature car load and change hub emission testing effect same, but its cost and operating cost all can reduce, and also can shorten dramatically cool time.
Summary of the invention
Situation at prior art, the objective of the invention is to set up discharge quick simulation tester for cold starting automobile engine of light car, this device can have fast, equipment is simple, with low cost, the advantage that simulate effect is good, be intended to simulate required low temperature environment of cold starting automobile engine of light car and automobile and change the hub process of the test, research and improvement cold starting automobile engine of light car characteristic, cold starting control strategy and optimization exhaust after treatment system, it is the platform of EUROIII Emission Standard emission limit scheme that the solution motor car engine satisfies light-duty vehicle cold starting emission testing.
Technical scheme of the present invention is as follows:
A kind of discharge quick simulation tester for cold starting automobile engine of light car, it is characterized in that: this device comprises cooling cabin, the cooling cabin refrigeration system, the tested engine, the engine coolant that are arranged in the cooling cabin force quickly cooling device, engine oil to force quickly cooling device and catalytic converter to force quickly cooling device, are arranged on the outer electric eddy current dynamometer of cooling cabin, two emission analyzers and computer control acquisition system; Described engine coolant forces quickly cooling device to comprise coolant recirculation pump, cooling water radiator, liquid coolant fan and the coolant circuit pipeline that the liquid coolant solenoid valve is installed; Described coolant circuit pipeline is connected with the engine lesser circulation that cooling-water temperature transmitter is housed; Described engine oil forces quickly cooling device to comprise lubricating oil heating radiator, the pneumatic pump, the lube oil pump that link to each other with this heating radiator and the oil circuit pipeline that the lubricating oil solenoid valve is installed, described oil circuit pipeline links to each other with the import and export of engine sump tank bottom, and lubricating oil temperature sensor is housed in oil sump; Described catalytic converter forces quickly cooling device to comprise catalytic converter and pneumatic pump, described pneumatic pump links to each other with the import of catalytic converter by the pipeline that the pneumatic pump solenoid valve is housed, and is respectively equipped with in the outlet of catalytic converter gas outlet and effluxes pneumoelectric magnet valve and interior exhaust solenoid valve.The present invention compared with prior art, have the following advantages and outstanding effect: the present invention is a kind of test unit based on conventional engine emission testing platform, tested engine is separated with other testing equipments and surveying instrument with special cooling cabin of making, it is in separately under-7 ℃ of low temperature environments.As conventional engine emission testing platform, test unit of the present invention can carry out remote (or compartment) operation, 15 working condition tests that can carry out on the automobile revolving drum test table by the process simulation engine of setting are used to study and improve the cold starting emission behavior of motor car engine.This invention has following principal feature: 1. less environmental chamber, and it can be in entire test, is the low temperature environment air inlet that engine provides for a long time-7 ℃, and use cost reduces greatly; 2. cool off by temperature closed loop control in the cabin with to the forced circulation of liquid coolant, lubricating oil and catalyst converter in the engine, reach comprehensive, cooling fast to engine and relevant auxiliary device thereof, shorten the setup time of cold-start test greatly, had quick cooling characteristics; 3. cooling cabin uses electric eddy current dynamometer that engine is controlled the cold starting process of the test that simulation Europe III emission standard is stipulated outward, measures the engine pollutant discharge amount with straight mining method simultaneously, has advantage with low cost, that simulate effect is good.
Description of drawings
Fig. 1 is the structural representation of motor car engine discharge quick simulation tester for cold starting.
Fig. 2 forces the quickly cooling device structural representation for engine coolant in the simulation emission testing device.
Fig. 3 is for forcing the quickly cooling device structural representation for engine oil in the simulation emission testing device.
Fig. 4 forces the quickly cooling device structural representation for catalytic converter in the simulation emission testing device.
Among the figure: 1-refrigeration unit, 2-cooling cabin, 3-evaporator, 4-cooling water radiator, 5-lubricating oil heating radiator, 6-catalytic converter, 7-hatch door, the tested engine of 8-, 9-pneumatic pump; The 10-fuel tank, 11-power output shaft, 12-emission analyzer, 13-gas outlet, 14-electric eddy current dynamometer, 15-computer control acquisition system, 16-liquid coolant fan, 17-coolant recirculation pump, 18-relay, 19-liquid coolant solenoid valve; The 20-cooling-water temperature transmitter; The 21-engine radiator, 22-lube oil pump, 23-lubricating oil relay; The 24-pneumatic pump; 25-lubricating oil temperature sensor 25,26-oil sump oil-out, 27-lubricating oil solenoid valve, 28-effluxes the pneumoelectric magnet valve, exhaust solenoid valve in the 29-, 30-catalytic converter temperature sensor, 31-pneumatic pump solenoid valve.
Embodiment
Below in conjunction with accompanying drawing concrete enforcement of the present invention is further described.
Fig. 1 is a motor car engine discharge quick simulation tester for cold starting structural representation provided by the invention.This device mainly comprises cooling cabin 2, tested engine 8, by the refrigeration unit 1 and the refrigeration system formed of the evaporator 3 in the cabin that are arranged on out of my cabin, engine coolant forces quickly cooling device, engine oil to force quickly cooling device and catalytic converter to force quickly cooling device, is arranged on the outer electric eddy current dynamometer of cooling cabin 14, two emission analyzers 12, computer control acquisition system 15; Described tested engine links to each other with electric eddy current dynamometer 14 by power output shaft 11.Cooling cabin is provided with hatch door 7, and the base plate of cooling cabin 2, body of wall, top board, hatch door 7 are made by insulation material.Gas outlet 13 and power output shaft 11 pass to out of my cabin from two holes that the cooling cabin body of wall is offered respectively, and power output shaft 11 two ends are connected with electric eddy current dynamometer 14 with tested engine 8 respectively, by the 15 operation controls of computer control acquisition system.Exhaust in the gas outlet 13 is directly adopted by emission analyzer 12, and data are imported computer control acquisition system 15 into.Refrigeration system is controlled the environment temperature in the cooling cabin 2 automatically.The computer of tested engine, fuel tank 10 are placed on simulation motor car engine time of day in the cooling cabin 2.Also being provided with engine coolant in the cooling cabin forces quickly cooling device, lubricating oil to force quickly cooling device and catalytic converter to force quickly cooling device, be used for cooling off fast tested engine 8, by being arranged on the temperature sensor in the cooling cabin 2, by each part temperatures in computer control acquisition system 15 display modules.Force quickly cooling device, lubricating oil to force quickly cooling device and catalytic converter to force to be respectively equipped with solenoid valve on the return of quickly cooling device at described engine coolant, be used to control the switching of this cooling device.Force quickly cooling device not worked during emission testing, just open when needing before and after the test.Behind the solenoid valve Close All, force the path of quickly cooling device to cut off, the liquid coolant of tested engine, lubricating oil, gas outlet path are consistent with former engine.
Fig. 2 is the structural representation that engine coolant provided by the invention is forced quickly cooling device.This device is that engine coolant is forced quick cooling, mainly comprises coolant recirculation pump 17, cooling water radiator 4, liquid coolant fan 16, relay 18 and the coolant circuit pipeline that liquid coolant solenoid valve 19 is installed; Described coolant circuit pipeline is connected with the engine lesser circulation that cooling-water temperature transmitter 20 is housed.Coolant recirculation pump 17 pumps into cooling water radiator 4 with liquid coolant and cools off.Cooling effect can be monitored by the cooling-water temperature transmitter in the engine cylinder cover 20.After cooling finishes, closed relay 18, solenoid valve 19 and fan 16, the extensive recovery machine recurrent state of coolant channels.
Fig. 3 is the structural representation that engine oil provided by the invention is forced quickly cooling device.This device mainly comprises lubricating oil heating radiator 5, the pneumatic pump 24 that links to each other with this heating radiator, lube oil pump 22 and the oil circuit pipeline that solenoid valve 27 is installed; Described oil circuit pipeline links to each other with the import and export of engine sump tank bottom, and lubricating oil temperature sensor 25 is housed in oil sump.When needs carry out the quick cooling of outer loop pressure to engine oil, open solenoid valve 27, to start working by relay 23 control pneumatic pumps 24 and lube oil pump 22, lubricating oil enters heating radiator 5 by oil sump oil-out 26 and cools off.Cooling effect can be monitored by the lubricating oil temperature sensor 25 of tested engine 8 oil sump inside.Cooling is closed solenoid valve 27 and relay 23 after finishing, and pneumatic pump 24 and lube oil pump 22 quit work, the extensive recovery machine recurrent state of engine oil.
Fig. 4 is the structural representation that catalytic converter provided by the invention is forced quickly cooling device.This device mainly comprises pneumatic pump 9, catalytic converter 6 and solenoid valve, and the import and export of catalytic converter are respectively equipped with catalytic converter temperature sensor 30.Described pneumatic pump links to each other with the import of catalytic converter by the pipeline that pneumatic pump solenoid valve 31 is housed, and is respectively equipped with in the outlet of catalytic converter gas outlet and effluxes pneumoelectric magnet valve 28 and interior exhaust solenoid valve 29.When needs are forced to cool off fast to catalytic converter, at first close and efflux pneumoelectric magnet valve 28, the switch of exhaust solenoid valve 29, pneumatic pump solenoid valve 31 in opening, cold air in the cooling cabin is pumped in the catalytic converter 6, make air in the cooling cabin inner loop by interior exhaust solenoid valve 29, cooling effect can be monitored by catalytic converter temperature sensor 30.Also can only open and efflux pneumoelectric magnet valve 28, exhaust solenoid valve 29 in closing pumps into the catalytic converter of absorption large quantity of exhaust gas with the cold air in the cooling cabin, cleans simultaneously and cools off, and discharge out of my cabin by effluxing pneumoelectric magnet valve 28.Open and efflux pneumoelectric magnet valve 28, in closing behind the exhaust solenoid valve 29, pneumatic pump solenoid valve 31, the extensive recovery machine state of engine exhaust system.
Claims (2)
1. discharge quick simulation tester for cold starting automobile engine of light car, it is characterized in that: this device comprises cooling cabin (2), the cooling cabin refrigeration system, the tested engine (8), the engine coolant that are arranged in the cooling cabin force quickly cooling device, engine oil to force quickly cooling device and catalytic converter to force quickly cooling device, are arranged on cooling cabin outer electric eddy current dynamometer (14), two emission analyzers (12) and computer control acquisition system (15); Described engine coolant forces quickly cooling device to comprise coolant recirculation pump (17), cooling water radiator (4), liquid coolant fan (16) and the coolant circuit pipeline that liquid coolant solenoid valve (19) is installed; Described coolant circuit pipeline is connected with the engine lesser circulation that cooling-water temperature transmitter (20) is housed; Described engine oil forces that quickly cooling device comprises lubricating oil heating radiator (5), pneumatic pump (24), the lube oil pump (22) that links to each other with this heating radiator and the oil circuit pipeline that lubricating oil solenoid valve (27) is installed, described oil circuit pipeline links to each other with the import and export of engine sump tank bottom, and lubricating oil temperature sensor (25) is housed in oil sump; Described catalytic converter forces quickly cooling device to comprise catalytic converter (6) and pneumatic pump (9), described pneumatic pump links to each other with the import of catalytic converter by the pipeline that pneumatic pump solenoid valve (31) is housed, and is respectively equipped with in the outlet of catalytic converter gas outlet and effluxes pneumoelectric magnet valve (28) and interior exhaust solenoid valve (29).
2. according to the described device of claim 1, it is characterized in that: the import and export at described catalytic converter are respectively equipped with catalytic converter temperature sensor (30).
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510011513 CN1664539A (en) | 2005-04-01 | 2005-04-01 | Discharge quick simulation tester for cold starting automobile engine of light car |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510011513 CN1664539A (en) | 2005-04-01 | 2005-04-01 | Discharge quick simulation tester for cold starting automobile engine of light car |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102121876A (en) * | 2010-12-17 | 2011-07-13 | 杭州银轮科技有限公司 | Test bed of postprocessing device for simulating diesel engine exhaust gas |
| CN102435438A (en) * | 2011-12-16 | 2012-05-02 | 潍柴动力股份有限公司 | Engine test stand |
| CN102444779A (en) * | 2011-12-13 | 2012-05-09 | 哈尔滨东安发动机（集团）有限公司 | Dry operation teat oil drainage device |
| CN102507201A (en) * | 2011-11-30 | 2012-06-20 | 重庆长安汽车股份有限公司 | Engine cooling system for engine bench test |
| CN103018051A (en) * | 2011-09-21 | 2013-04-03 | 通用汽车环球科技运作有限责任公司 | Method and system for simulating various engine operating conditions to evaluate engine emissions test equipment |
| CN103048140A (en) * | 2012-12-27 | 2013-04-17 | 东南大学 | Device for testing low-temperature low-air-pressure starting and operating characteristics of engine |
| CN103362680A (en) * | 2013-08-08 | 2013-10-23 | 安徽江淮汽车股份有限公司 | Basic calibration system of vehicle engine control unit |
| CN110333093A (en) * | 2019-07-19 | 2019-10-15 | 东莞市泰丰空调制冷设备有限公司 | A kind of water cooler test platform |
| CN110736622A (en) * | 2019-10-31 | 2020-01-31 | 中船动力研究院有限公司 | emission generation test device |
| CN110793776A (en) * | 2019-11-15 | 2020-02-14 | 中国第一汽车股份有限公司 | Plateau high-low temperature test environment cabin for engine |
| CN112378666A (en) * | 2020-12-01 | 2021-02-19 | 东风汽车集团有限公司 | Engine exhaust hot end durability test method, test device and system |
| CN112485008A (en) * | 2020-11-11 | 2021-03-12 | 中汽研汽车检验中心（天津）有限公司 | Aftertreatment temperature control device and method for diesel engine in-loop |
| CN113092122A (en) * | 2021-04-13 | 2021-07-09 | 哈尔滨东安汽车发动机制造有限公司 | Test method for simulating real vehicle cold start emission by using engine pedestal |
| CN113864037A (en) * | 2021-09-24 | 2021-12-31 | 中国第一汽车股份有限公司 | Test rapid cooling control method |
-
2005
- 2005-04-01 CN CN 200510011513 patent/CN1664539A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN102121876A (en) * | 2010-12-17 | 2011-07-13 | 杭州银轮科技有限公司 | Test bed of postprocessing device for simulating diesel engine exhaust gas |
| CN103018051B (en) * | 2011-09-21 | 2016-05-18 | 通用汽车环球科技运作有限责任公司 | Simulate various engine operating conditions and assess the method and system of emission testing equipment |
| CN103018051A (en) * | 2011-09-21 | 2013-04-03 | 通用汽车环球科技运作有限责任公司 | Method and system for simulating various engine operating conditions to evaluate engine emissions test equipment |
| CN102507201A (en) * | 2011-11-30 | 2012-06-20 | 重庆长安汽车股份有限公司 | Engine cooling system for engine bench test |
| CN102444779A (en) * | 2011-12-13 | 2012-05-09 | 哈尔滨东安发动机（集团）有限公司 | Dry operation teat oil drainage device |
| CN102435438A (en) * | 2011-12-16 | 2012-05-02 | 潍柴动力股份有限公司 | Engine test stand |
| CN102435438B (en) * | 2011-12-16 | 2014-12-31 | 潍柴动力股份有限公司 | Engine test stand |
| CN103048140A (en) * | 2012-12-27 | 2013-04-17 | 东南大学 | Device for testing low-temperature low-air-pressure starting and operating characteristics of engine |
| CN103048140B (en) * | 2012-12-27 | 2015-04-08 | 东南大学 | Device for testing low-temperature low-air-pressure starting and operating characteristics of engine |
| CN103362680B (en) * | 2013-08-08 | 2016-12-28 | 安徽江淮汽车股份有限公司 | A kind of vehicle engine control unit basis caliberating device |
| CN103362680A (en) * | 2013-08-08 | 2013-10-23 | 安徽江淮汽车股份有限公司 | Basic calibration system of vehicle engine control unit |
| CN110333093A (en) * | 2019-07-19 | 2019-10-15 | 东莞市泰丰空调制冷设备有限公司 | A kind of water cooler test platform |
| CN110736622A (en) * | 2019-10-31 | 2020-01-31 | 中船动力研究院有限公司 | emission generation test device |
| CN110793776A (en) * | 2019-11-15 | 2020-02-14 | 中国第一汽车股份有限公司 | Plateau high-low temperature test environment cabin for engine |
| CN112485008A (en) * | 2020-11-11 | 2021-03-12 | 中汽研汽车检验中心（天津）有限公司 | Aftertreatment temperature control device and method for diesel engine in-loop |
| CN112485008B (en) * | 2020-11-11 | 2022-07-29 | 中汽研汽车检验中心（天津）有限公司 | Aftertreatment temperature control device and method for diesel engine in-loop |
| CN112378666A (en) * | 2020-12-01 | 2021-02-19 | 东风汽车集团有限公司 | Engine exhaust hot end durability test method, test device and system |
| CN112378666B (en) * | 2020-12-01 | 2021-12-21 | 东风汽车集团有限公司 | Engine exhaust hot end durability test method, test device and system |
| CN113092122A (en) * | 2021-04-13 | 2021-07-09 | 哈尔滨东安汽车发动机制造有限公司 | Test method for simulating real vehicle cold start emission by using engine pedestal |
| CN113864037A (en) * | 2021-09-24 | 2021-12-31 | 中国第一汽车股份有限公司 | Test rapid cooling control method |
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