CN207703487U - Simulation two-step supercharging pressure side/whirlpool end bypasses the device influenced on spray characteristics - Google Patents
Simulation two-step supercharging pressure side/whirlpool end bypasses the device influenced on spray characteristics Download PDFInfo
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- CN207703487U CN207703487U CN201820017839.XU CN201820017839U CN207703487U CN 207703487 U CN207703487 U CN 207703487U CN 201820017839 U CN201820017839 U CN 201820017839U CN 207703487 U CN207703487 U CN 207703487U
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- 238000009826 distribution Methods 0.000 abstract description 4
- 238000000889 atomisation Methods 0.000 abstract description 3
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- 238000002156 mixing Methods 0.000 abstract description 3
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Abstract
The utility model discloses a kind of device that simulation two-step supercharging pressure side/whirlpool end bypass influences spray characteristics, device includes pressure side bypass simulation system, variable volume firebomb device and spraying camera system, pressure side/whirlpool end bypass is studied to atomization, mixing in variable volume firebomb using recombination laser induced fluorescence technology, development course, the influence of concentration distribution and microscopic characteristics condition.The utility model can more actually simulate pressure side/influence of whirlpool end bypass to spray characteristics in piston approaches top dead center, be supported using improvement spray atomization after pressure/whirlpool end bypass and mixing to realize that high-efficiency cleaning burning provides gross data for further investigation.
Description
Technical field
The utility model is related to technical field of automobile engine, specially a kind of simulation two-step supercharging pressure side/whirlpool end bypass
The device that spray characteristics are influenced.
Background technology
With to internal combustion engine thermal efficiency pursuit and emission regulation it is increasingly strict, single-stage turbocharging can not meet
Use demand of the diesel engine to big flow.In two-step supercharging system, the appearance of pressure side bypass has weight to two-step supercharging system
Big meaning.Currently, the most commonly used is in a hiigh pressure stage booster pressure side by-pass in parallel, tune of its presence to air inflow
Section is more flexible, to the different demands of tolerance when especially for variable working condition.After pressure side by-passing valve is opened, hiigh pressure stage compressor goes out
The gas backflow of mouth goes back to hiigh pressure stage compressor inlet end, and an airflow circulating is thus formd between hiigh pressure stage and by-passing valve,
To reduce the throughput entered in cylinder.Whirlpool end bypass and pressure side bypass are then different, and the air pressure of turbine outlet is not above
The air pressure of entrance, so the branch of fraction from the side flows to the outlet end of turbine and without whirlpool after whirlpool end valve is opened
Wheel, reduces the efficiency of turbine to affect the working condition of compressor in this way.The unlatching of pressure side/whirlpool end by-passing valve not only subtracts
Air inflow is lacked, also the flow characteristics of gas has been had an impact, to affect the spray cone angle and oil droplet when fuel injection
Particle diameter distribution after broken, distribution of concentration.
Utility model content
In view of the above-mentioned problems, the purpose of this utility model is to provide a kind of simulation two-step supercharging pressure side/whirlpool end bypass pair
The device that spray characteristics influence, can solve in actual internal combustion engine, and pressure side/whirlpool end bypasses ask sightless to spray characteristics
Topic can more actually simulate pressure side/influence of whirlpool end bypass to spray characteristics in piston approaches top dead center, for further investigation
It is supported using spray atomization and mixing is improved after pressure/whirlpool end bypass to realize that high-efficiency cleaning burning provides gross data.Technology
Scheme is as follows：
A kind of device that simulation two-step supercharging pressure side/whirlpool end bypass influences spray characteristics, including pressure side bypass simulation system
System, variable volume firebomb device and spraying camera system；
Pressure side bypass simulation system include air compressor, lower pressure stage turbine, hiigh pressure stage turbine, air cleaner,
Low-pressure stage compressor and hiigh pressure stage compressor；
The gas outlet of air compressor is connected to the air inlet of lower pressure stage turbine, and the gas outlet of lower pressure stage turbine is connected to height
It arbitrarily downgrades the air inlet of turbine, whirlpool end temperature sensor I and whirlpool side pressure force snesor I is equipped at lower pressure stage turbine gas outlet；
Whirlpool end bypass branch is equipped between the air inlet and gas outlet of hiigh pressure stage turbine, whirlpool end bypass branch is equipped with solenoid valve I, electromagnetism
The side that valve I is connect with the gas outlet of hiigh pressure stage turbine is equipped with whirlpool end temperature sensor II and whirlpool side pressure force snesor II；High pressure
The gas outlet of grade turbine is also connected to the tracheae for leading to air；
The gas outlet of air cleaner is connected to the air inlet of low-pressure stage compressor, the gas outlet connection of low-pressure stage compressor
To the air inlet of hiigh pressure stage compressor, temperature sensor I and pressure sensor I are equipped at low-pressure stage compressor gas outlet；
Temperature sensor II and pressure sensor II are equipped at hiigh pressure stage compressor gas outlet；The air inlet of hiigh pressure stage compressor and
Pressure side bypass branch is equipped between gas outlet, pressure side bypass branch is equipped with solenoid valve II, solenoid valve II and hiigh pressure stage compressor
The side of gas outlet connection is equipped with pressure sensor III and temperature sensor III；
The lower pressure stage turbine is connected with each other with low-pressure stage compressor by common axis of rotation, the hiigh pressure stage turbine with
Hiigh pressure stage compressor is connected with each other by common axis of rotation；
The variable volume firebomb device includes piston of cylindric combustion chamber and its inside；It is equipped with above combustion chamber
Firebomb upper end cover, firebomb upper end cover are equipped with fuel injector, and equipped with the through-hole for being connected to vacuum pump by exhaust pipe, and even
It is connected to the through-hole of hiigh pressure stage compressor gas outlet；Bottom of combustion chamber is equipped with bleeder pipe and air inlet pipe；Air inlet pipe is connected to gas storage
Steel cylinder is additionally provided with solenoid valve III and pressure reducing valve in air inlet pipe；Bleeder pipe is equipped with vent valve；Sidewall of combustion chamber is equipped with firebomb
Form Ι and firebomb form II；The such position sensor of piston base；
The spraying camera system includes spectroscope, Xecl excimer lasers, and the high-speed photography for shooting gas phase
Machine ICCD Ι and high-speed motion picture camera ICCD Π for shooting liquid phase；Spectroscope is placed in outside firebomb form Ι, high-speed motion picture camera
The focus of ICCD Ι and high-speed motion picture camera ICCD Π on spectroscope in merging；The laser that Xecl excimer lasers are sent out is through reflective
Mirror Ι and reflective mirror II reflect, and are converted to a branch of light through beam expanding lens, collimating mirror and compressional mirror successively, then are regarded by firebomb
Window II is irradiated in combustion chamber；
Above all of sensor, solenoid valve and high-speed motion picture camera ICCD and fuel injector, air compressor, Xecl are accurate
Molecular laser is all connected to automatically controlled and collecting unit, automatically controlled that the control signal that computer is sent out is received with collecting unit, realizes
The control that oil spout, photography and solenoid valve open and close.
Further, the firebomb form Ι is distributed on chamber wall in 90 ° of angles with firebomb form II.
Further, the top land is ω combustion-chamber shapes；Inner Wall of Combustion Chamber is equipped with for piston limit
Baffle ring；Sealing ring is equipped between piston combustion chamber interior walls.
The utility model has the beneficial effects that：
1. the utility model provides a simulation two-step supercharging pressure side/whirlpool end bypass influences device, energy to spray characteristics
It is enough to provide foundation to advanced optimize Injection strategy；
2. the utility model replaces exhaust gas-driven turbine using compressor, be conducive to simplify device, and make simulator
It is closer to the truth, make scheme be easier to realize；
3. the utility model can preferably analyze the gas after by-passing valve unlatching using the temperature and pressure sensor of installation
Flow the variation in flow field；
4. the utility model more really simulates the compression top center in engine using variable volume firebomb
The flow field of air-flow；
5. the utility model processes the shape of combustion chamber on moveable piston, be conducive to really simulate burning
Influence of the room to spraying.
Description of the drawings
Fig. 1 is that the utility model simulates two-step supercharging pressure side/whirlpool end bypass to spray characteristics influence apparatus structure schematic diagram.
Fig. 2 is that the utility model simulates two-step supercharging pressure side/whirlpool end bypass to spray characteristics influence experimental method flow chart.
In figure：1- air compressors；2- air cleaners；3- lower pressure stage turbines；4- low-pressure stage compressors；5- temperature sensing
Device I；6- pressure sensors I；The whirlpools 7- end temperature sensor I；The whirlpools 8- side pressure force snesor I；9- solenoid valves；The whirlpools 10- end temperature
Sensor II；The whirlpools 11- side pressure force snesor II；12- hiigh pressure stage turbines；13- hiigh pressure stage compressors；14 temperature sensors II；
15- pressure sensors II；16- solenoid valves II；17- pressure sensors III；18- temperature sensors III；19- fuel injectors； 20-
Computer；21- high-speed motion picture cameras 1CCD I；22- spectroscope 23- high-speed motion picture camera lCCD Π；24- vent valves；25- deflates
Pipe；26- baffle rings；27- pistons；28- sealing rings；29- position sensors；30- air inlet pipe；31- solenoid valves III；32- pressure reducing valves；
33- steel cylinders；34- firebomb upper end covers；35- compressional mirrors；36- collimating mirrors；37- beam expanding lens；38- reflective mirrors I；39- reflective mirrors
Ⅱ；40-Xecl excimer lasers；41- exhaust pipes；42- vacuum pumps；43- is automatically controlled and collecting unit.
Specific implementation mode
The utility model is described in further details in the following with reference to the drawings and specific embodiments.As shown in Figure 1, a kind of mould
Quasi- two-step supercharging pressure side/whirlpool end bypasses the device influenced on spray characteristics, including pressure side bypass simulation system, variable volume combustion
It burns and plays device and spraying camera system.
The pressure side bypass simulation system includes air compressor 1, lower pressure stage turbine 3, hiigh pressure stage turbine 12, air-filtering
Device 2, low-pressure stage compressor 4 and hiigh pressure stage compressor 13.
The gas outlet of air compressor 1 is connected to the air inlet of lower pressure stage turbine 3, the gas outlet connection of lower pressure stage turbine 3
To the air inlet of hiigh pressure stage turbine 12, whirlpool end temperature sensor I 7 and whirlpool end pressure are equipped at 3 gas outlet of lower pressure stage turbine
Sensor I 8；Whirlpool end bypass branch is equipped between the air inlet and gas outlet of hiigh pressure stage turbine 12, whirlpool end bypass branch is equipped with
Solenoid valve I 9, the side that solenoid valve I 9 is connect with the gas outlet of hiigh pressure stage turbine 12 are equipped with whirlpool end temperature sensor II 10 and whirlpool end
Pressure sensor II 11.When solenoid valve I is opened, whirlpool end bypass branch can make air without hiigh pressure stage turbine, directly from low pressure
Grade turbine outlet port is to hiigh pressure stage turbine outlet port；The gas outlet of hiigh pressure stage turbine 12 is also connected to the tracheae for leading to air.
The gas outlet of air cleaner 2 is connected to the air inlet of low-pressure stage compressor 4, the gas outlet of low-pressure stage compressor 4
It is connected to the air inlet of hiigh pressure stage compressor 13, temperature sensor I 5 and pressure are equipped at 4 gas outlet of low-pressure stage compressor
Sensor I 6；It is equipped with temperature sensor II 14 and pressure sensor II 15 at 13 gas outlet of hiigh pressure stage compressor；Hiigh pressure stage
Pressure side bypass branch is equipped between the air inlet and gas outlet of compressor 13, pressure side bypass branch is equipped with solenoid valve II 16, electricity
The side that magnet valve II 16 is connect with 13 gas outlet of hiigh pressure stage compressor is equipped with pressure sensor III 17 and temperature sensor III 18.It is high
13 gas outlet of compressor of arbitrarily downgrading is connected by pipeline with the air inlet of not constant volume combustion bomb.
The lower pressure stage turbine 3 is connected with each other with low-pressure stage compressor 4 by common axis of rotation, the hiigh pressure stage turbine
12 are connected with each other with hiigh pressure stage compressor 13 by common axis of rotation.
The variable volume firebomb device includes piston 27 of cylindric combustion chamber and its inside；It is set above combustion chamber
There is firebomb upper end cover 34, firebomb upper end cover 34 is equipped with fuel injector 19, and is equipped with and is connected to vacuum pump by exhaust pipe 41
42 through-hole, and it is connected to the through-hole of 13 gas outlet of hiigh pressure stage compressor；The firebomb upper end cover 34 passes through bolt and cylinder body
It links together, there are three holes for upper part.For installing fuel injector 19, one connects with pipeline for one hole, for allow air into
Enter in firebomb, another is connected with exhaust pipe 41 for being vented.
Bottom of combustion chamber is equipped with bleeder pipe 25 and air inlet pipe 30；Air inlet pipe 30 is connected to the steel cylinder 33 of gas storage, air inlet pipe 30
On be additionally provided with solenoid valve III 31 and pressure reducing valve 32；Bleeder pipe 25 is equipped with vent valve 24.Sidewall of combustion chamber is regarded equipped with firebomb
Window Ι and firebomb form II；The such position sensor in 27 bottom of the piston 29.In order to facilitate arrangement external equipment, this implementation
Being separated by 90 degree of distributions on the firebomb device side wall of example, there are four forms for shooting.
27 top of the piston is ω combustion-chamber shapes；Inner Wall of Combustion Chamber is equipped with the baffle ring for being limited to piston 27
26；Sealing ring 28 is equipped between 27 Inner Wall of Combustion Chamber of piston.
The spraying camera system includes spectroscope 22, Xecl excimer lasers 40, and the high speed for shooting gas phase
Video camera ICCD Ι 21 and high-speed motion picture camera ICCD Π 23 for shooting liquid phase；Spectroscope 22 is placed in outside firebomb form Ι, high
The focus of fast video camera ICCD Ι 21 and high-speed motion picture camera ICCD Π 23 merges on spectroscope 22；Xecl excimer lasers 40
The laser sent out is reflected through reflective mirror Ι 39 and reflective mirror II 38, and is converted to successively through beam expanding lens 37, collimating mirror 36 and compressional mirror
A branch of light, then be irradiated in combustion chamber by firebomb form II；
Above all of sensor, solenoid valve and high-speed motion picture camera ICCD and fuel injector 19, air compressor 1, Xecl
Excimer laser 40 is all connected to the automatically controlled control sent out with collecting unit 43, automatically controlled and collecting unit 43 reception computer 20
Signal realizes the control that oil spout, photography and solenoid valve open and close.
Control method：
The automatically controlled aperture and air compressor operating power that can control control valve in air compressor with collecting unit, and
The gas pressure and flow signal and collected each temperature and pressure transmitter signal that air compressor is fed back can be received simultaneously.
Input needs default boost pressure to be simulated in electric-control system, automatically controlled that air pressure is roughly calculated out with collecting unit
Contracting machine should output gas flow and pressure, and control air compressor and started to work with certain power.At the same time,
The automatically controlled gas pressure and flow fed back according to the signal and air compressor that receive acquisition pressure sensor III with collecting unit
After signal, control signal fine tuning air compressor is sent out.
If boost pressure, which is less than, presets boost pressure, control valve is sent out according to automatically controlled and collecting unit in air compressor
Valve is opened big and improves its power by signal, is allowed to close to desired value.
If boost pressure, which is higher than, presets boost pressure, control valve is sent out according to automatically controlled and collecting unit in air compressor
Valve is turned down and is reduced its power by signal, is allowed to close to desired value.
Test principle：
Temperature sensor Ι and the collected data of pressure sensor Ι are used to calculate low-pressure stage blower outlet flow, and
Monitor the variation of hiigh pressure stage compressor inlet end gas pressure.Using The Ideal-Gas Equation PV=mRT, quality stream can be calculated
M is measured, P perfect gases are pressure in formula, and V is volume, and R is ideal gas constant, and T perfect gases are thermodynamic temperature.It is similarly warm
Sensor II and pressure sensor II are spent for calculating the gas flow by bypass branch, temperature after pressure side by-passing valve is opened
Sensor III and pressure sensor III are used to calculate the flow of hiigh pressure stage blower outlet, and monitor hiigh pressure stage blower outlet
Hold the variation of gas pressure.Analyze the change of hiigh pressure stage compressor entrance end gas pressure during pressure side by-passing valve is opened
Change, into bypass branch gas flow account for hiigh pressure stage exit gas flow ratio and branch in gas flow rates, be
It is more preferable to illustrate that pressure side bypass not only reduces gas flow and also had an impact to the flow behavior of gas circuit.In conjunction with laser induced fluorescence
Shooting result, provide data for influence of the pressure side bypass to spraying is explained further and support.
Experiment process：
Fluorescer will be filled in fuel tank first（Physical property is similar to diesel oil）For simulating diesel spray.Pass through shimming
Mode can adjust fuel injector and stretch into the depth of chamber, in more true simulated engine in top dead centre fuel injector and combustion chamber
The distance between.
Then Xecl excimer lasers are opened, adjustment reflective mirror Ι and adjustment reflective mirror II make Xecl excimer lasers
Before the laser to beam expanding lens sent out, changes the diameter of laser by beam expanding lens, and converge light beam by collimating mirror, most pass through afterwards
Overcompression mirror converts light beam to a branch of light vertical irradiation in spraying.Adjusting high-speed motion picture camera and light splitting mirror angle will burn
Before light beam in bullet guides to video camera, prepare for shooting
Air compressor is opened, in simulating two-step supercharging system, air compressor provides power, simulated exhaust for turbine
Effect.Boost pressure is set to reach preset value by adjusting the control valve in air compressor
When needing to simulate pressure side bypass, synchronizing signal is sent out to electronic control unit, the same time control of electronic control unit first with computer
The unlatching of electromagnetism solenoid valve II processed then controls the unlatching of solenoid valve III, piston rapid uplink under the promotion of high pressure gas（With
The uplink of piston in simulated engine）, position sensor judges at baffle ring to be reached feedback signal to electronic control unit, electricity
Control unit opens fuel injector immediately, and when at this moment Xecl excimer lasers are irradiated to spraying, induced fluorescence agent shines, and at this moment controls
Two high-speed motion picture cameras are shot, while the data of acquisition system collecting temperature sensor and pressure sensor.
After simulation, all solenoid valves are closed, open vent valve 24, make piston return, are opened in vacuum pumped
Air and spray droplet be next time simulation prepare.
Whirlpool end influence experimentation of the bypass to spray characteristics with the above process similarly, difference lies in closing solenoid valve II,
Opens solenoid valve Ι.
Claims (3)
1. a kind of simulation two-step supercharging pressure side/whirlpool end bypasses the device influenced on spray characteristics, which is characterized in that by pressure side
Logical simulation system, variable volume firebomb device and spraying camera system；
The pressure side bypass simulation system includes air compressor（1）, lower pressure stage turbine（3）, hiigh pressure stage turbine（12）, air filter
Clear device（2）, low-pressure stage compressor（4）With hiigh pressure stage compressor（13）；
Air compressor（1）Gas outlet be connected to lower pressure stage turbine（3）Air inlet, lower pressure stage turbine（3）Gas outlet connect
It is connected to hiigh pressure stage turbine（12）Air inlet, close to lower pressure stage turbine（3）Whirlpool end temperature sensor I is equipped at gas outlet（7）With
Whirlpool side pressure force snesor I（8）；Hiigh pressure stage turbine（12）Air inlet and gas outlet between be equipped with whirlpool end bypass branch, by the end of whirlpool
Logical branch road is equipped with solenoid valve I（9）, solenoid valve I（9）With hiigh pressure stage turbine（12）Gas outlet connection side be equipped with whirlpool end temperature
Spend sensor II（10）With whirlpool side pressure force snesor II（11）；Hiigh pressure stage turbine（12）Gas outlet be also connected to and lead to air
Tracheae；
Air cleaner（2）Gas outlet be connected to low-pressure stage compressor（4）Air inlet, low-pressure stage compressor（4）Outlet
Mouth is connected to hiigh pressure stage compressor（13）Air inlet, close to low-pressure stage compressor（4）Temperature sensor I is equipped at gas outlet
（5）With pressure sensor I（6）；Close to hiigh pressure stage compressor（13）Temperature sensor II is equipped at gas outlet（14）It is passed with pressure
Sensor II（15）；Hiigh pressure stage compressor（13）Air inlet and gas outlet between be equipped with pressure side bypass branch, pressure side bypass branch
It is equipped with solenoid valve II（16）, solenoid valve II（16）With hiigh pressure stage compressor（13）The side of gas outlet connection is equipped with pressure sensing
Device III（17）With temperature sensor III（18）；
The lower pressure stage turbine（3）With low-pressure stage compressor（4）It is connected with each other by common axis of rotation, the hiigh pressure stage turbine
（12）With hiigh pressure stage compressor（13）It is connected with each other by common axis of rotation；
The variable volume firebomb device includes piston of cylindric combustion chamber and its inside（27）；It is equipped with above combustion chamber
Firebomb upper end cover（34）, firebomb upper end cover（34）Fuel injector is installed（19）, and be equipped with and pass through exhaust pipe（41）It is connected to
Vacuum pump（42）Through-hole, and be connected to hiigh pressure stage compressor（13）The through-hole of gas outlet；Bottom of combustion chamber is equipped with bleeder pipe
（25）And air inlet pipe（30）；Air inlet pipe（30）It is connected to the steel cylinder of gas storage（33）, air inlet pipe（30）On be additionally provided with solenoid valve III
（31）And pressure reducing valve（32）；Bleeder pipe（25）It is equipped with vent valve（24）；Sidewall of combustion chamber is equipped with firebomb form Ι and burning
Play form II；The piston（27）The such position sensor in bottom（29）；
The spraying camera system includes spectroscope（22）, Xecl excimer lasers（40）, and the high speed for shooting gas phase
Video camera ICCD Ι（21）With the high-speed motion picture camera ICCD Π for shooting liquid phase（23）；Spectroscope（22）It is placed in firebomb form Ι
Outside, high-speed motion picture camera ICCD Ι（21）With high-speed motion picture camera ICCD Π（23）Focus in spectroscope（22）Upper merging；Xecl standards point
Sub- laser（40）The laser sent out is through reflective mirror Ι（39）With reflective mirror II（38）Reflection, and successively through beam expanding lens（37）, collimation
Mirror（36）It is converted to a branch of light with compressional mirror, then is irradiated in combustion chamber by firebomb form II；
Above all of sensor, solenoid valve and high-speed motion picture camera ICCD and fuel injector（19）, air compressor（1）、Xecl
Excimer laser（40）It is all connected to automatically controlled and collecting unit（43）, automatically controlled and collecting unit（43）Receive computer（20）Hair
The control signal gone out realizes the control that oil spout, photography and solenoid valve open and close.
2. simulation two-step supercharging pressure side/whirlpool end according to claim 1 bypasses the device influenced on spray characteristics, feature
It is, the firebomb form Ι is distributed on chamber wall in 90 ° of angles with firebomb form II.
3. simulation two-step supercharging pressure side/whirlpool end according to claim 1 bypasses the device influenced on spray characteristics, feature
It is, the piston（27）Top is ω combustion-chamber shapes；Inner Wall of Combustion Chamber is equipped with for piston（27）The baffle ring of limit
（26）；Piston（27）Sealing ring is equipped between Inner Wall of Combustion Chamber（28）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820017839.XU CN207703487U (en) | 2018-01-05 | 2018-01-05 | Simulation two-step supercharging pressure side/whirlpool end bypasses the device influenced on spray characteristics |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820017839.XU CN207703487U (en) | 2018-01-05 | 2018-01-05 | Simulation two-step supercharging pressure side/whirlpool end bypasses the device influenced on spray characteristics |
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| Publication Number | Publication Date |
|---|---|
| CN207703487U true CN207703487U (en) | 2018-08-07 |
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| CN201820017839.XU Expired - Fee Related CN207703487U (en) | 2018-01-05 | 2018-01-05 | Simulation two-step supercharging pressure side/whirlpool end bypasses the device influenced on spray characteristics |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152044A (en) * | 2018-01-05 | 2018-06-12 | 西华大学 | The device and method that simulation two-step supercharging pressure side/whirlpool end bypass influences spray characteristics |
-
2018
- 2018-01-05 CN CN201820017839.XU patent/CN207703487U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108152044A (en) * | 2018-01-05 | 2018-06-12 | 西华大学 | The device and method that simulation two-step supercharging pressure side/whirlpool end bypass influences spray characteristics |
| WO2019134645A1 (en) * | 2018-01-05 | 2019-07-11 | 西华大学 | Device and method for simulating effect of two-stage supercharging pressure end or turbo end bypass on spray characteristics |
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