CN209117351U - Simulate the experimental rig of hot WHTC circulation in the cold and hot WHTC circulation of diesel engine - Google Patents
Simulate the experimental rig of hot WHTC circulation in the cold and hot WHTC circulation of diesel engine Download PDFInfo
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- CN209117351U CN209117351U CN201920003506.6U CN201920003506U CN209117351U CN 209117351 U CN209117351 U CN 209117351U CN 201920003506 U CN201920003506 U CN 201920003506U CN 209117351 U CN209117351 U CN 209117351U
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Abstract
The utility model discloses the experimental rigs of hot WHTC circulation in a kind of cold and hot WHTC circulation of simulation diesel engine comprising test-bed stored program controlled, electric dynamometer, air inlet air conditioning, booster and intercooler.Electric dynamometer is connected by data with test-bed stored program controlled, is connected by transmission shaft with diesel engine to be measured；Air inlet air conditioning is connected to one end of air intake duct；Booster is connected to the other end of air intake duct, and booster is also connected with the exhaust pipe of diesel engine to be measured simultaneously；One end of intercooler pass through in cold preceding air inlet pipe be connected with booster；The other end pass through in it is cold after air inlet pipe be connected with the air inlet pipe of diesel engine to be measured.The experimental rig can make the SCR catalyst unit temperature of hot WHTC circulation consistent with the temperature for carrying out hot WHTC circulation in cold and hot WHTC test, the efficiency of SCR catalyst unit can be given full play to, reduce urea to spray, energy conservation and environmental protection, nominal data is more efficient reliable.
Description
Technical field
The utility model is that field is tested about derv fuel diesel engine bench, cold especially with regard to a kind of simulation diesel engine
The experimental rig of hot WHTC circulation in hot WHTC (transient-cycle in point state test) circulation.
Background technique
Six stage emission regulation of existing derv fuel diesel engine state is required to meet cold and hot WHTC emission limit, therefore is needed
Cold and hot WHTC last row calibration is carried out to diesel machine, and catalyst converter SCR (selective catalytic reduction) catalyst unit is to nitrogen oxidation
The transformation efficiency of object is very sensitive to temperature, especially cold stage.When for the calibration of cold and hot WHTC last row, to improve exploitation effect
Rate usually demarcates pure hot WHTC, and hot WHTC test cycle is entered under different catalyst temperatures, will lead to
Temperature Distribution in hot WHTC test cycle in SCR catalyst unit is also different, if practical cold and hot WHTC cannot be simulated strictly according to the facts
Profiling temperatures in the catalyst converter of hot WHTC circulation in circulation then will lead to the urea injecting quantity demarcated when calibration and increase
Add, the result of final cold and hot WHTC can be smaller, leads the problems such as NH_3 leakage is big, or the urea injecting quantity demarcated when calibration is caused to subtract
Few, the result of final cold and hot WHTC is not up to standard.
To solve the above problems, for being capable of the practical cold and hot WHTC circulation of accurate simulation in the cold and hot WHTC calibration of diesel machine
Hot entry condition, hot circulation in the SCR catalyst unit temperature and practical cold and hot WHTC circulation when recycling hot WHTC
Unanimously, way general at present: first is that being catalyzed according to SCR when entering operating condition in hot circulation in practical cold and hot WHTC circulation single
The temperature of first entrance, when the temperature of SCR catalyst unit entrance is close to the temperature, startup program carries out pure hot WHTC
Verifying, in the method it is also possible that the SCR catalyst unit temperature obtained when hot WHTC is recycled merely is followed with practical cold and hot WHTC
Hot circulation is also more close in ring, but since heat engine operating condition is inconsistent or the inconsistent SCR interior carrier temperature of heat engine mode
Distribution still has larger difference, also will affect catalyst unit catalytic efficiency, leads to cold and hot WHTC emission result inaccuracy；Second is that
It is tested according to laws and regulations requirement, but regulation is tested to have and compares strict requirements to cold and hot WHTC, this requirement limits daily only
Primary, more wasteful time and resource can be done.
Therefore it is analyzed in terms of diesel machine SCR catalyst unit characteristic, it would be desirable to a kind of test method is found, it can be accurate
The hot entry condition of the practical cold and hot WHTC circulation of simulation, makes the SCR catalyst unit temperature and reality when simple hot WHTC circulation
Hot circulation is consistent in the cold and hot WHTC circulation in border, can give full play to catalyst unit efficiency in this way, and diesel emission is also more accurate
Property and consistency.
The information disclosed in the background technology section is intended only to increase the understanding to the general background of the utility model, and
It is not construed as recognizing or implying in any form that information composition is already known to those of ordinary skill in the art existing
Technology.
Utility model content
The purpose of this utility model is to provide the examinations of hot WHTC circulation in a kind of cold and hot WHTC circulation of simulation diesel engine
Experiment device is mainly used for simulating the test of hot WHTC circulation in the cold and hot WHTC circulation of diesel machine, can make hot
The SCR catalyst unit temperature of WHTC circulation is consistent with the temperature for carrying out hot WHTC circulation in cold and hot WHTC test, can be abundant
The efficiency of SCR catalyst unit is played, reduction urea sprays, energy conservation and environmental protection, and nominal data is more efficient reliable.
To achieve the above object, the utility model provides hot WHTC in a kind of cold and hot WHTC circulation of simulation diesel engine and follows
The experimental rig of ring comprising test-bed stored program controlled, electric dynamometer, air inlet air conditioning, booster and intercooler.Electric power
Dynamometer machine is connected by data with test-bed stored program controlled, is connected by transmission shaft with diesel engine to be measured；Air inlet air conditioning
It is connected to one end of air intake duct；Booster is connected to the other end of air intake duct, the booster exhaust also with diesel engine to be measured simultaneously
Pipe is connected；One end of intercooler pass through in cold preceding air inlet pipe be connected with booster；The other end pass through in it is cold after air inlet pipe with
The air inlet pipe of diesel engine to be measured is connected.
In a preferred embodiment, the experimental rig that hot WHTC is recycled in the cold and hot WHTC circulation of simulation diesel engine is also
It is connected by whirlpool heel row tracheae with booster including catalyst converter silencer；And exhaust backpressure valve passes through catalyst converter heel row tracheae
It is connected with gas analyzer.
In a preferred embodiment, the experimental rig that hot WHTC is recycled in the cold and hot WHTC circulation of simulation diesel engine is also
Including air-intake negative-pressure regulating valve, it is arranged on air intake duct, and between air inlet air conditioning and booster.
In a preferred embodiment, adjust air inlet air conditioning intake air temperature, air-intake negative-pressure adjustment valve open degree, in
Water valve open degree, the open degree of exhaust backpressure valve of cooler, can control intake air temperature of the diesel engine to be measured under declared working condition,
Intake vacuum, in it is cold after temperature or exhaust back pressure meet the experimental condition of prescribed requirement.
Compared with prior art, the examination that hot WHTC is recycled in the cold and hot WHTC circulation of the simulation diesel engine of the utility model
Experiment device has the advantages that the SCR catalyst unit temperature that can make hot WHTC circulation and carries out cold and hot WHTC test
In hot WHTC circulation temperature it is consistent, the efficiency of SCR catalyst unit can be given full play to, reduce urea injection, energy conservation and environmental protection,
Nominal data is more efficient reliable.
Detailed description of the invention
Fig. 1 is the flow chart according to the test method of one embodiment of the utility model.
Fig. 2 is the schematic diagram according to the experimental rig of one embodiment of the utility model.
Main appended drawing reference explanation:
1- test-bed stored program controlled (such as PUMA system)；2- electric dynamometer；3- air inlet air conditioning；4- air-intake negative-pressure tune
Save valve；5- air intake duct；6- air inlet pipe；7- diesel engine to be measured；8- exhaust pipe；9- booster；The whirlpool 10- heel row tracheae；11- catalysis
Device silencer；Cold rear air inlet pipe in 12-；13- intercooler；Cold preceding air inlet pipe in 14-；15- catalyst converter heel row tracheae；16- exhaust
Counterbalance valve；17- gas analyzer.
Specific embodiment
With reference to the accompanying drawing, specific embodiment of the present utility model is described in detail, it is to be understood that this is practical
Novel protection scope is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As shown in Figure 1, Fig. 1 is the flow chart according to the test method of one embodiment of the utility model.It is practical according to this
The test method of hot WHTC circulation, packet in a kind of cold and hot WHTC circulation of simulation diesel machine of novel preferred embodiment
It is pre- to include heat engine step, experiment condition rate-determining steps, SCR catalyst unit pre-treatment step, diesel engine hot exposure WHTC cyclic test
Processing step and formal hot WHTC cyclic test step.Heat engine step be the work provided according to diesel engine manufacturing enterprise
Condition requirement, or determine that carrying out operating condition heat engine should ensure that diesel engine at the end of diesel engine heat engine according to mature engineering experience
The temperature averages of coolant liquid and lubricating oil are at least kept 2 minutes or more within ± 2 DEG C；Experiment condition rate-determining steps are bases
Regulation control diesel engine the lower intake air temperature of declared working condition, intake vacuum, in it is cold after temperature and exhaust back pressure meet examination
Test condition；SCR catalyst unit pre-treatment step is the WHTC cyclic program set according to rack, is selected in WHTC cyclic program
The state of cyclic operation of 600 ± 10s is tested afterwards, to pre-process to SCR catalyst unit；Diesel engine hot exposure WHTC circulation examination
Testing pre-treatment step is 10 ± 1min of diesel engine hot dipping to be carried out immediately, using as diesel oil after completing the pretreatment of SCR catalyst unit
The pretreatment of machine hot exposure WHTC cyclic test；Formal hot WHTC cyclic test step is opened at once after hot dipping expires foot
Dynamic rack WHTC cyclic program carries out formal hot WHTC cyclic test.
As shown in Fig. 2, Fig. 2 is the schematic diagram according to the experimental rig of one embodiment of the utility model.It is practical according to this
The experimental rig of hot WHTC circulation, the test in a kind of cold and hot WHTC circulation of simulation diesel engine of novel preferred embodiment
Device is used to simulate the test of hot WHTC circulation in the cold and hot WHTC circulation of diesel machine, which includes test-bed
Stored program controlled 1 (e.g. PUMA system)), electric dynamometer 2, air inlet air conditioning 3, booster and intercooler.Electric dynamometer
2 are connected by data with test-bed stored program controlled 1, and electric dynamometer 2 is connected by transmission shaft with diesel engine 7 to be measured；
Air inlet air conditioning 3 is connected to one end of air intake duct 5；Booster 9 is connected to the other end of air intake duct 5, booster 9 simultaneously also with it is to be measured
The exhaust pipe 8 of diesel engine 7 is connected；One end of intercooler 13 pass through in cold preceding air inlet pipe 14 be connected with booster 9；The other end
Cold rear air inlet pipe 12 is connected with the air inlet pipe 6 of diesel engine 7 to be measured in.
In some embodiments, the experimental rig of hot WHTC circulation further includes in the cold and hot WHTC circulation of simulation diesel engine
Catalyst converter silencer 11 is connected by whirlpool heel row tracheae 10 with booster 9；And exhaust backpressure valve 16 passes through catalyst converter heel row
Tracheae 15 is connected with gas analyzer 17.
In some embodiments, the experimental rig of hot WHTC circulation further includes in the cold and hot WHTC circulation of simulation diesel engine
Air-intake negative-pressure regulating valve 4 is arranged on air intake duct 5, and between air inlet air conditioning 3 and booster 9.
In some embodiments, adjust the intake air temperature of air inlet air conditioning 3, the open degree of air-intake negative-pressure regulating valve 4, in it is cold
Water valve open degree, the open degree of exhaust backpressure valve 16 of device 13, it will be able to control air inlet of the diesel engine 7 to be measured under declared working condition
Temperature, intake vacuum, in it is cold after temperature or exhaust back pressure meet the experimental condition of prescribed requirement.
In conclusion the experimental rig of the utility model passes through compared with currently used hot WHTC circulation test device
It crosses actual measurement to summarize, the energy accurate simulation hot WHTC that actually cold and hot WHTC is recycled is recycled into condition, makes hot WHTC circulation SCR
The temperature of catalyst unit is consistent with the temperature of WHTC circulation hot in cold and hot WHTC circulation, can give full play to SCR catalyst unit
Efficiency reduces urea consumption, and energy conservation and environmental protection can save a large number of experiments time, improves WHTC cycle bleeder calibration efficiency etc..
The description of the aforementioned specific exemplary embodiment to the utility model is in order to illustrate and illustration purpose.These
Description is not wishing to for the utility model to be limited to disclosed precise forms, and it will be apparent that according to the above instruction, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the utility model
And its practical application, so that those skilled in the art can be realized and utilize a variety of different examples of the utility model
Property embodiment and various chooses and changes.The scope of the utility model is intended to by claims and its waits similar shapes
Formula is limited.
Claims (4)
1. the experimental rig of hot WHTC circulation, is used to simulate diesel engine cold and hot in a kind of cold and hot WHTC circulation of simulation diesel engine
The test of hot WHTC circulation in WHTC circulation, which is characterized in that the experimental rig includes:
Test-bed stored program controlled；
Electric dynamometer is connected with the test-bed stored program controlled by data, passes through transmission shaft and diesel engine to be measured
It is connected；
Air inlet air conditioning is connected to one end of air intake duct；
Booster is connected to the other end of the air intake duct, the booster exhaust also with the diesel engine to be measured simultaneously
Pipe is connected；And
Intercooler, one end pass through in cold preceding air inlet pipe be connected with the booster；The other end pass through in it is cold after air inlet pipe with
The air inlet pipe of the diesel engine to be measured is connected.
2. the experimental rig that hot WHTC is recycled in the cold and hot WHTC circulation of simulation diesel engine as described in claim 1, feature
It is, further includes:
Catalyst converter silencer is connected by whirlpool heel row tracheae with the booster；And
Exhaust backpressure valve is connected by catalyst converter heel row tracheae with gas analyzer.
3. the experimental rig that hot WHTC is recycled in the cold and hot WHTC circulation of simulation diesel engine as claimed in claim 2, feature
It is, further includes air-intake negative-pressure regulating valve, be arranged on the air intake duct, and is located at the air inlet air conditioning and the booster
Between.
4. the experimental rig that hot WHTC is recycled in the cold and hot WHTC circulation of simulation diesel engine as claimed in claim 3, feature
It is, adjusts the intake air temperature of the air inlet air conditioning, the air-intake negative-pressure adjusts the open degree of valve, the water valve of the intercooler is opened
The open degree of Qi Du, the exhaust backpressure valve can control intake air temperature of the diesel engine to be measured under declared working condition, air inlet
Vacuum degree, in it is cold after temperature or exhaust back pressure meet the experimental condition of prescribed requirement.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920003506.6U CN209117351U (en) | 2019-01-02 | 2019-01-02 | Simulate the experimental rig of hot WHTC circulation in the cold and hot WHTC circulation of diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920003506.6U CN209117351U (en) | 2019-01-02 | 2019-01-02 | Simulate the experimental rig of hot WHTC circulation in the cold and hot WHTC circulation of diesel engine |
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| CN209117351U true CN209117351U (en) | 2019-07-16 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443775A (en) * | 2019-01-02 | 2019-03-08 | 广西玉柴机器股份有限公司 | Simulate the test method and device of hot WHTC circulation in the cold and hot WHTC circulation of diesel engine |
| CN111006867A (en) * | 2019-11-26 | 2020-04-14 | 广西玉柴机器股份有限公司 | Calibration method of engine air intake correction map table and air intake correction method |
-
2019
- 2019-01-02 CN CN201920003506.6U patent/CN209117351U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109443775A (en) * | 2019-01-02 | 2019-03-08 | 广西玉柴机器股份有限公司 | Simulate the test method and device of hot WHTC circulation in the cold and hot WHTC circulation of diesel engine |
| CN109443775B (en) * | 2019-01-02 | 2024-03-01 | 广西玉柴机器股份有限公司 | Test method and device for simulating hot WHTC (WHTC) cycle in cold-hot WHTC cycle of diesel engine |
| CN111006867A (en) * | 2019-11-26 | 2020-04-14 | 广西玉柴机器股份有限公司 | Calibration method of engine air intake correction map table and air intake correction method |
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