CN1181259C - Evaluating tester for catalytic cleaner activity of motorcycle - Google Patents
Evaluating tester for catalytic cleaner activity of motorcycle Download PDFInfo
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- CN1181259C CN1181259C CNB021163529A CN02116352A CN1181259C CN 1181259 C CN1181259 C CN 1181259C CN B021163529 A CNB021163529 A CN B021163529A CN 02116352 A CN02116352 A CN 02116352A CN 1181259 C CN1181259 C CN 1181259C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The present invention relates to an active evaluation device of a catalytic purifier of a motorcycle and a portable motorcycle. According to the actual service conditions of the catalytic purifier of a motorcycle, the active evaluation device provides an activity evaluation test device which uses the motorcycle engine exhaust as an air source, and an overall dimension catalyst in actual use as evaluation objects to achieve the purpose that under the condition of simulating actual service conditions, the activity of the motorcycle catalytic purifier is accurately estimated. The active evaluation device comprises an air-fuel ratio measurement and control subsystem, an exhaust gas heat exchange subsystem, a flow measurement and control subsystem, and an exhaust gas direct sampling and analysis system; each system can be individually used or used in a combination way according to different requirements of test specifications; a motorcycle engine which is practically matched with the catalyst is used as an air source for generating exhaust gas; and the active evaluation device is a test device for measuring the catalyst activity.
Description
Technical field
The present invention relates to motorcycle and trail bike catalytic cleaner activation evaluating device.
Background technique
A large amount of uses of motorcycle produce severe contamination to environment, and it is main solution that catalytic cleaner reduction discharging is installed in exhaust system for motorcycle.Catalytic cleaner purification ratio (that is, activity) to the harmful exhaust composition under different service conditions need be estimated, and the active evaluation test device is necessary and key in catalyst converter production, application process.
At present, the relevant motorcycle of having issued is only seen with the active evaluation test device of catalytic cleaner and is used limited several calibrating gas mixed preparing simulated exhaust as source of the gas, gets the report that volume has only several milliliters sample to estimate on catalytic cleaner.As document " motorcycle pollutes the experimental study of control catalytic converter " " Techniques and Equipment for Environmental Pollution Control " first phase in 2000.Though this method is the activity of anticaltalysis purifier to a certain extent,, there is following defective in this sample active evaluation test: the simulated engine exhaust of being prepared departs from actual conditions at aspects such as composition kind and concentration.More than kind surplus only hydrocarbon constituents just has 200 in the motor actual exhaust air, wherein every kind of concrete composition proportion is owing to the difference of engine type and running operating mode presents very complicated variation, it obviously is unpractical attempting to use standard gas that the waste gas of complexity like this is accurately simulated preparation, so the method for preparation simulation source of the gas is difficult to the accurate response catalyst converter at actual service conditions; In addition, with the sample of taking off on the catalytic cleaner as the catalytic cleaner global shape of also having been ignored actual use by evaluation object and structure to its active material impact.
For automobile with the activity rating of catalytic cleaner occurred relevant with the motor car engine actual exhaust air as source of the gas, the full-scale catalyst converter that uses with reality is as by the report of the testing apparatus of evaluation object.As document " the performance evaluation technology and the test method of automotive catalyst " " automotive engineering " 1999 (Vol.21).But, because the greatest differences that exists between motorcycle engine and the motor car engine makes the motorcycle catalytic cleaner directly to test on automobile correlation test device.Main cause is: motorcycle both can use four stroke engine, can use two stroke engine again, and automobile uses four stroke engine.There is difference in essence in this motor of two types at aspects such as taking a breath, burn and be lubricated, this directly causes the greatest differences of exhaust gas composition; In addition, motor car engine is based on water-cooled, electronic fuel injection fuel feeding, engine displacement big (with liter), motorcycle engine is based on air-cooled, Carburetor fuel feeding, discharge capacity little (with milliliter), and this also directly causes aspects such as its exhaust gas composition, flow, temperature widely different.So the correlation test device of automobile can't directly carry out evaluation test to motorcycle catalytic cleaner activity.
Summary of the invention
The objective of the invention is to actual service conditions at the motorcycle catalytic cleaner, invent the source of the gas of a kind of waste gas that produces with motorcycle engine running as evaluation test, the full-scale catalyst converter that reality is used reaches under the simulation actual service conditions the active purpose of accurately estimating of motorcycle catalytic cleaner as the active evaluation test device of evaluation object.
The present invention is achieved in that
1. motorcycle catalytic cleaner activation evaluating testing apparatus, it is made up of air fuel ratio measurement and control subsystem, waste gas heat switching subsystem, flow measurement and control subsystem, waste gas Direct Sampling and analytical system;
A. air fuel ratio is measured and control subsystem: be to utilize air-fuel ratio sensor directly to measure air fuel ratio or calculate air fuel ratio by measuring the engine exhaust composition, before the air fuel ratio measuring point, replenish air, realize device air fuel ratio control to engine exhaust pipeline amount decided at the higher level but not officially announced; The two stroke engine air fuel ratio is measured occasion, then measure engine fuel and air consumption simultaneously, calculate air fuel ratio;
B. waste gas heat switching subsystem: before catalyst converter, constitute by the heating and cooling device;
C. exhaust gas flow is measured and control subsystem: be by the aperture of control engine exhaust bypath valve, the aperture and the engine operating condition of heating and cooling device portal valve, the realization control flows is crossed the flow meter of catalyst converter waste gas;
D. waste gas Direct Sampling and analytical system: be that a waste gas thief hatch respectively is installed before and after the catalyst converter, the waste gas that thief hatch flows out is divided into two, and wherein one the tunnel through filtering, enters the HC ANALYZER along hot channel; Filter, dewater through sampling apparatus in another road after inflow-rate of water turbine score other and CO, CO
2, O
2The ANALYZER that need not the thermal recovery sample with NOx etc. is connected, thereby realizes waste gas Direct Sampling and measurement of concetration;
More than each system can be used alone or in combination according to the requirement of test specification.
The present invention can select for use waste gas that actual matching used motor produces as the active evaluation test source of the gas.
Motorcycle of the present invention is the motor inlet and outlet flow measuring device with pressure stabilizer and flowmeter with the catalytic cleaner activation evaluating testing apparatus.
Enter a-b box at exhaust flow through sampling conduit, the a-b box internal face is a thermal-protective material, and box house is installed an Electric heating appliance, by the temperature transducer and the outer temperature controller formation closed loop spin manifold temperature control system of casing of box house; Each gas circuit all is connected in series filter cleaner, and the clogged filter situation is by the vacuum gauge monitoring of installing on the pipeline; The break-make of gas circuit is realized by the heat-resisting solenoid valve of installing in the a-b box.
Sampling apparatus of the present invention is: waste gas is through high temperature resistant strainer filtering larger particles; The waste gas that need not the analysis of thermal recovery sample dewaters through condenser; Finish waste gas sampling and smart filter through diaphragm pump and fine cleaner then,, have the sampling apparatus of multistage filtering with after solenoid valve is assigned to each exhaust-gas analyzer that need not the thermal recovery sample.
Characteristics of the present invention are:
1. air fuel ratio is measured and control subsystem is: measurement engine exhaust composition was also adjusted measurement and control gear to reach desired value to exhaust gas constituents before the air fuel ratio measuring point.Select two or four-stroke engine for motor cycle of catalyst converter actual match, be fixed in engine pedestal and be connected with dynamometer, the power that sends is absorbed by dynamometer, its running operating mode is controlled by dynamometer, utilizes the waste gas source of the gas of the exhaust of engine running generation as the catalyst converter active evaluation test.
2. develop respectively at the characteristics of the existing oil supply system of two-stroke and four stroke engine respectively that air fuel ratio is measured, control subsystem, to reach the control that inflow is tried the waste gas air fuel ratio of catalyst converter;
3. at the lost relatively large characteristics exploitation of motorcycle engine exhaust gas heat exhaust heat switching subsystem, to reach adjustment and control to delivery temperature;
4. the little and big characteristics of pulsing at the motorcycle engine air displacement are developed the gas flow measurement and the control subsystem that are suitable for the big pulsation of small flow, to reach the control to the exhaust gas flow that flows through catalyst converter;
5. at the wide and more serious granular material discharged characteristics of the concentration range of motorcycle engine exhaust gas composition, exploitation exhaust Direct Sampling system also matches multrirange exhaust concentration analyzer, has constituted waste gas Direct Sampling and analyzing subsystem.
The invention has the advantages that: use the actual supporting motor of catalyst converter as the waste gas source of the gas, realized accurate simulation the catalyst converter service condition; Developed be fit to two, the multiple air fuel ratio of four stroke engine measures and controlling schemes, can realize air fuel ratio control neatly; Exhaust-heat exchanger with intensification and cooling function has been realized the flexible control of exhaust gas temperature; The engine breathing measuring system of subsidiary pressure stabilizer can accurately be measured the intake and exhaust flow of the bigger pulsation of motorcycle engine; Direct Sampling switched system and exhaust-gas analyzer can be realized waste gas sampling and concentration analysis flexibly, calculate purification ratio according to harmful gas concentration difference before and after the catalyst converter.Following Fig. 9, Figure 10, Figure 11, Figure 12 are native system is used catalyst converter light off characteristics and air fuel ratio characteristic to typical case two, 4 stroke motorcycle evaluation test result.
Description of drawings
Fig. 1: motorcycle catalytic cleaner activation evaluating device
Fig. 2: four stroke engine exhaust air-supplementing method air fuel ratio is measured and the control embodiment
Fig. 3: two-stroke motorcycle engine measuring air and fuel consume theoretical air-fuel ratio are used example
Fig. 4: exhaust heat exchanger is used example
Fig. 5: four stroke engine extraction flow measuring system is used example
Fig. 6: two stroke engine inlet and outlet Flow Measuring System is used example
Fig. 7: a-b box structure applications example
Fig. 8: sampling apparatus structure applications example
Fig. 9: four stroke engine catalyst converter light off characteristics
Figure 10: two stroke engine catalyst converter light off characteristics
Figure 11: four stroke engine catalyst converter air fuel ratio characteristic
Figure 12: two stroke engine catalyst converter air fuel ratio characteristic
Description of reference numerals:
1: four stroke engine 23: fuel consumption meter
2: dynamometer 24: flowmeter and secondary meter thereof
3: fuel tank 25: pressure stabilizer
4: fuel consumption meter 26: two stroke engine
5: flow control valve 27: dynamometer
6: heating equipment 28: flow control valve
7: cooling unit 29: heating equipment
8: air fuel ratio measuring device 30: cooling unit
9: catalyst container 31: the air fuel ratio measuring device
10: cooling unit 32: cooler
11: pressure stabilizer 33: pressure stabilizer
12: flowmeter and secondary meter 34 thereof: catalyst container
13: oil-less pump 35: flowmeter and secondary meter thereof
14: decompression and flow control valve 36: thermostatic control system
15: flow measuring device 37: strainer
16: a-b box 38: vacuum gauge
17: sampling apparatus 39: thermoelectrical magnetic valve
18: heating pipe 40: the refrigeration dehydrater
19: flowmeter 41: pump
20: exhaust-gas analyzer 42: secondary filter
21: hot type sampling conduit 43: solenoid valve
22: fuel tank 44: motor
Embodiment
Be further described below in conjunction with 1 pair of this explanation of accompanying drawing:
One, air fuel ratio is measured and the control testing apparatus
Air fuel ratio is measured and control subsystem is: measurement engine exhaust composition was also adjusted measurement and control gear to reach desired value to exhaust gas constituents before the air fuel ratio measuring point.According to the difference of motor, the structure of this subtense angle is distinguished to some extent.
1. the four stroke engine air fuel ratio is measured:
Four stroke engine 1 is fixed in stand and is connected by shaft coupling with dynamometer 2.To engine oil, dynamometer 2 is responsible for control motor 1 running operating mode and absorbed power to fuel tank 3 by fuel consumption meter 4.The exhaust that produces in four stroke engine 1 operation process is crossed the laggard catalyst container 9 of going into the catalyst converter place of heat-exchange system through channel flow, and air fuel ratio measuring device 8 was installed before catalyst container 9, as wide territory air-fuel ratio sensor etc., gathers and also shows the air fuel ratio measurement result.
As mentioned above, the air fuel ratio measuring device 8 before catalyst converter also can change the sampling probe that multicomponent waste gas divides instrument into except that the air-fuel ratio sensor of wide territory.The multicomponent waste gas that has divides instrument not only to have the function of gathering and analyzing the preceding exhaust gas constituents of catalyst converter, utilize exhaust gas constituents to calculate and show the function of air fuel ratio in addition, relevant mathematical model can be found in the relevant books of internal-combustion engine, so also can calculate air fuel ratio voluntarily according to exhaust gas concentration.
2. four stroke engine air fuel ratio control:
At present most homemade four-stroke engine for motor cycle adopt the Carburetor fuel feeding.Carburetor all has the air fuel ratio regulating mechanism, adjusts screw etc. as oil-pin position, main jet and mixed gas.Can directly utilize these existing mechanisms that engine air-fuel ratio is adjusted.
On the method basis of aforesaid control air fuel ratio, increase the device that in exhaust, replenishes air and can further improve the control effect.That is, adjust Carburetor in advance, make engine air-fuel ratio adjust to dense partially state in advance.Oil-less pump 13 is gone into the replenish air of certain flow in the exhaust through decompression and flow control valve 14 and flow measuring device 15.Under the monitoring of air fuel ratio measuring device 8, can realize control to air fuel ratio to flow of air supply adjustment.The four stroke engine air fuel ratio is measured and is controlled referring to Fig. 2.
In addition, also can adopt the method for tonifying Qi between Carburetor and motor, promptly so-called electronic controlled carburetor, control air fuel ratio.
Simultaneously, along with popularizing gradually of homemade motorcycle electric control fuel oil jet system, can directly reach the air fuel ratio control target by the parameter of adjusting electronic fuel injection.
3. two stroke engine air fuel ratio measuring device:
There is very big difference between two stroke engine gas exchange process and the four stroke engine.That is, two stroke engine utilizes fresh fuel-air mixture that in-cylinder combustion waste gas is scanned out, and follows this process to have the fresh fuel-air mixture of part and just discharges motor in company with waste gas without burning.For this reason, the ventilation characteristics at the two-stroke motorcycle motor have designed corresponding air fuel ratio measuring device.
Two stroke engine 26 is fixed in engine pedestal, links to each other with dynamometer 27 by shaft coupling.The running operating mode and the absorbed power of dynamometer 27 control two stroke engines 26.The exhaust that produces in two stroke engine 26 operation process is as the source of the gas of catalytic cleaner activation evaluating test.
As shown in Figure 3, fuel tank 22, constitutes engine fuel and consumes measurement subsystem to engine oil through fuel consumption meter 23; Air inlet pressure stabilizing chamber 25 and flowmeter and secondary meter 24 thereof are installed in engine aspirating system, are constituted engine air and consume measurement subsystem.Measure fuel consume and air consumption in the engine working process simultaneously, the two is divided by and can obtains the motor air fuel ratio of this moment.
If air fuel ratio measuring device 31 was installed before catalyst container 34, concrete structure and test philosophy are with the corresponding testing apparatus of four stroke engine, and measured air fuel ratio also can be for reference.
4. two stroke engine air-fuel ratio control device:
The control of two stroke engine air fuel ratio is different according to the difference of method of measurement.
As adopting the air fuel ratio test method of measuring engine fuel and air consumption simultaneously, can directly adjust carburetor needle valve position, main jet, mixed gas adjustment screw and engine operating condition etc. influences the structural parameter of mixture strength, or use electronic controlled carburetor, electric control fuel oil jet system etc. reach the control to the two stroke engine air fuel ratio.
When utilize two stroke engine exhaust gas composition theoretical air-fuel ratio, when the air fuel ratio instrument being installed in vent systems directly measuring air fuel ratio, except that can using aforesaid air/fuel ratio control method, can also adopt the mode of the gas that in exhaust, covers in the similar four stroke engine auxiliary fuel supply-system to realize.
Two, thermometry and control subsystem:
In order to realize that heat-exchange system is necessary to the control of catalyst container inlet exhaust gas temperature.The waste gas heat exchange system is made of intensification and cooling device and flow control valve before catalyst converter.
Four-stroke is similar with the heat-exchange device structure of two-stroke pilot system, is that example is illustrated with the four-stroke heat-exchange system only here.
This heat-exchange system has heating equipment 6 and cooling unit 7, flow into the assignment of traffic ratio of heating equipment 6 and cooling unit 7 by flow control valve 5 controls, thermocouple is installed in the exhaust duct before catalyst container 9 is measured exhaust gas temperature, thereby the temperature that reaches expection after the waste gas of heat-exchange device mixes is flow through in adjustment flow control valve 5 and the realization of heating and cooling intensity.
Wherein in the two-stroke pilot system: heating equipment 29 is the same 6, cooling unit 30 is the same 7, flow control valve 28 the same 5.
After the catalytic cleaner ignition owing to exothermic oxidation reaction make catalyst converter after exhaust gas temperature sharply raise.For the protection to the extraction flow measuring system, this device is installed a cooling unit 10 in catalyst container 9 backs.Concrete mode is referring to Fig. 4.
Three, exhaust gas flow is measured and control subsystem:
The purpose that four-stroke and two stroke engine are measured extraction flow provides the feedback signal of engine exhaust flow control and the usefulness of calculating catalyst converter air speed; The purpose that the two stroke engine charge flow rate is measured is to follow fuel consume to measure to constitute the air fuel ratio measuring system.
Flow control system is by the aperture of control bypath valve, the aperture and the engine operating condition of heating and cooling valve, reaches the control gear that control flows is crossed the catalyst converter exhaust gas flow.
The structural similarity of four-stroke and two stroke engine inlet and outlet Flow Measuring System is that example is illustrated with four-stroke extraction flow measuring system only here.
The motorcycle engine swept volume causes extraction flow little for a short time, and the present in addition homemade motorcycle engine overwhelming majority is a single-cylinder engine, causes the exhaust pulsation bigger.One exhaust pressure stabilizer 11 is installed to reach the effect that suppresses the exhaust pulsation in cooling unit 10 backs for this reason.In exhaust pressure stabilizer 11 backs flowmeter and secondary meter 12 thereof are installed.This device can be realized the measurement function to extraction flow.
Wherein in the two-stroke pilot system: pressure stabilizer 33 is the same 11, cooling unit 32 is the same 10, amount is taken into account its secondary meter 35 the same 12.
Thereby control the air speed of tested catalytic cleaner in order to control the engine exhaust flow, this testing apparatus is installed bypass valve 5 in vent systems, with a part of engine exhaust bypass.This device cooperates the engine operating condition adjustment, realizes the extraction flow control to the inflow catalyst converter under the monitoring of extraction flow device, and then realizes the control to tested catalyst converter air speed.
Inlet and outlet flow measurement and control gear schematic representation also can be referring to Fig. 5,6.
Four, waste gas Direct Sampling and analyzing subsystem
Waste gas Direct Sampling and analytical system are in the front and back of catalyst container a waste gas thief hatch to be installed respectively, and the waste gas that thief hatch flows out is divided into two, and the waste gas sample that requires the thermal recovery sample enters the HC ANALYZER through filtering along hot channel; The waste gas sample of non-thermal recovery sample filters, dewaters after the inflow-rate of water turbine score is not connected with ANALYZER, as CO, CO through sampling apparatus
2, O
2With NOx etc., thereby realize exhaust-gas analyzer Direct Sampling and measurement of concetration.
In the four-stroke pilot system in catalyst container 9 and the two-stroke system front and back of catalyst container 34 a waste gas thief hatch respectively has been installed.The multichannel waste gas that thief hatch takes out enters a-b box 16 along hot type sampling conduit 21.Wherein have only one road waste gas to flow out by a-b box 16, this road waste gas is divided into two subsequently, wherein one the tunnel requires the waste gas of thermal recovery sample to enter HFID (heating hydrogen flame ion is surveyed) type HC ANALYZER through heating pipe 18; After another road non-thermal recovery sample waste gas sample dewaters through sampling apparatus 17 respectively with CO, CO
2, O
2Be connected with ANALYZER 20 with NOx etc. and flowmeter 19, thereby realize changeable Direct Sampling and the measurement of concetration of single cover exhaust-gas analyzer multichannel waste gas.
The schematic representation of sampling apparatus 17 is referring to Fig. 8.Waste gas is through strainer filtering larger particles; Dewater through condenser 40; Diaphragm pump 41 and the secondary filter 42 that drives through motor 44 finished the waste gas sampling, filters and dewatered then.With after solenoid valve 43 is assigned to each exhaust-gas analyzer.
Claims (5)
1. motorcycle catalytic cleaner activation evaluating testing apparatus, it is characterized in that: it is made up of air fuel ratio measurement and control subsystem, waste gas heat switching subsystem, flow measurement and control subsystem, waste gas Direct Sampling and analytical system;
A. air fuel ratio is measured and control subsystem: be to utilize air-fuel ratio sensor directly to measure air fuel ratio or calculate air fuel ratio by measuring the engine exhaust composition, before the air fuel ratio measuring point, replenish air, realize device air fuel ratio control to engine exhaust pipeline amount decided at the higher level but not officially announced; The two stroke engine air fuel ratio is measured occasion, then measure engine fuel and air consumption simultaneously, calculate air fuel ratio;
B. waste gas heat switching subsystem: before catalyst converter, constitute by the heating and cooling device;
C. exhaust gas flow is measured and control subsystem: be by the aperture of control engine exhaust bypath valve, the aperture and the engine operating condition of heating and cooling device portal valve, the realization control flows is crossed the flow meter of catalyst converter waste gas;
D. waste gas Direct Sampling and analytical system: be that a waste gas thief hatch respectively is installed before and after the catalyst converter, the waste gas that thief hatch flows out is divided into two, and wherein one the tunnel through filtering, enters the HC ANALYZER along hot channel; Filter, dewater through sampling apparatus in another road after inflow-rate of water turbine score other and CO, CO
2, O
2The ANALYZER that need not the thermal recovery sample with NOx etc. is connected, thereby realizes waste gas Direct Sampling and measurement of concetration;
More than each system can be used alone or in combination according to the requirement of test specification.
2. a kind of motorcycle catalytic cleaner activation evaluating testing apparatus according to claim 1 is characterized in that: select for use waste gas that actual matching used motor produces as the active evaluation test source of the gas.
3. a kind of motorcycle catalytic cleaner activation evaluating testing apparatus according to claim 1 is characterized in that: the motor inlet and outlet flow measuring device with pressure stabilizer and flowmeter.
4. a kind of motorcycle catalytic cleaner activation evaluating testing apparatus according to claim 1, it is characterized in that exhaust flow enters a-b box through sampling conduit, the a-b box internal face is a thermal-protective material, box house is installed an Electric heating appliance, by the temperature transducer and the outer temperature controller formation closed loop spin manifold temperature control system of casing of box house; Each gas circuit all is connected in series filter cleaner, and the clogged filter situation is by the vacuum gauge monitoring of installing on the pipeline; The break-make of gas circuit is realized by the heat-resisting solenoid valve of installing in the a-b box.
5. a kind of motorcycle catalytic cleaner activation evaluating testing apparatus according to claim 1 is characterized in that described sampling apparatus is: waste gas is through high temperature resistant strainer filtering larger particles; The waste gas that need not the analysis of thermal recovery sample dewaters through condenser; Finish waste gas sampling and smart filter through diaphragm pump and fine cleaner then,, have the sampling apparatus of multistage filtering with after solenoid valve is assigned to each exhaust-gas analyzer that need not the thermal recovery sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021163529A CN1181259C (en) | 2002-03-28 | 2002-03-28 | Evaluating tester for catalytic cleaner activity of motorcycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021163529A CN1181259C (en) | 2002-03-28 | 2002-03-28 | Evaluating tester for catalytic cleaner activity of motorcycle |
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| CN1369627A CN1369627A (en) | 2002-09-18 |
| CN1181259C true CN1181259C (en) | 2004-12-22 |
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| CNB021163529A Expired - Fee Related CN1181259C (en) | 2002-03-28 | 2002-03-28 | Evaluating tester for catalytic cleaner activity of motorcycle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103656454B (en) * | 2013-12-15 | 2015-08-26 | 徐士魁 | A kind of medicine for the treatment of infantile malnutrition and preparation method thereof |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104131870A (en) * | 2014-08-11 | 2014-11-05 | 安徽艾可蓝节能环保科技有限公司 | Aging air supplementing device for three-way catalytic converter bench test |
| CN104634807B (en) * | 2015-01-11 | 2018-02-16 | 浙江大学 | A kind of honeycomb-shaped SCR catalyst quick aging experimental provision |
| CN105223022A (en) * | 2015-11-17 | 2016-01-06 | 潍柴动力股份有限公司 | A kind of catalyzer checking device based on engine pedestal and method |
| CN107327335A (en) * | 2017-06-16 | 2017-11-07 | 苏州博菡环保科技有限公司 | Engine vent gas catalytic cleaner activation evaluating system |
| KR101967467B1 (en) * | 2017-12-14 | 2019-04-09 | 현대오트론 주식회사 | Water Injector Control Method For Damage Prevention of Exhaust Gas Purifying Catalyst, And Engine Operated Thereby |
| CN108131189B (en) * | 2018-01-31 | 2019-06-04 | 安徽江淮汽车集团股份有限公司 | After-treatment technics test macro |
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2002
- 2002-03-28 CN CNB021163529A patent/CN1181259C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103656454B (en) * | 2013-12-15 | 2015-08-26 | 徐士魁 | A kind of medicine for the treatment of infantile malnutrition and preparation method thereof |
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