CN110107437A - Air-assisted atomization fuel injector and control method - Google Patents
Air-assisted atomization fuel injector and control method Download PDFInfo
- Publication number
- CN110107437A CN110107437A CN201910360262.1A CN201910360262A CN110107437A CN 110107437 A CN110107437 A CN 110107437A CN 201910360262 A CN201910360262 A CN 201910360262A CN 110107437 A CN110107437 A CN 110107437A
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- Prior art keywords
- fuel injector
- air
- atomization
- oil
- gas
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/30—Controlling fuel injection
- F02D2041/3088—Controlling fuel injection for air assisted injectors
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The present invention relates to a kind of air-assisted atomization fuel injector and control method, petroleum pipeline is equipped in the fuel injector cylinder side of the fuel injector, petroleum pipeline one end connects fuel gallery, and the other end is connected to the oil pocket of plunger base；The fuel injector cylinder other side is equipped with auxiliary air channel, auxiliary air channel one end connecting gas transmission pipe, and the other end is connected in the rectification shell of fuel injector cylinder and radome fairing composition；The fuel injector introduces gas after intercooler, electromagnetic switch valve is set among gas pipeline, the solenoid valve is consistent with the fuel injector control solenoid valve connection type of oil spout with the connection type of ECU, when fuel injector receives ECU signal, in induction stroke latter stage commencement of fuel injection, electromagnetic valve switch opens simultaneously in air flue, pressurization gas sprays into the rectification shell of fuel injector from diagram air accessory channel, high pressure gas passes through collector ring, flow-disturbing ring, check valve, it meets with the gasoline of ejection, carry out assisted atomization, improve atomization quality, optimize the atomization characteristics of fuel injector.
Description
Technical field
The present invention relates to a kind of air-assisted atomization fuel injector and control methods, and in particular to one kind is from engine with supercharger
High pressure gas is introduced after cooler, by fairing, carries out the fuel injector and control method of assisted atomization.
Background technique
Along with energy crisis and environmental problem, in-cylinder direct fuel-injection engine is reducing oil consumption and pollution, is improving hair by it
The significant advantage of motivation aspect of performance becomes one of engine research, development field application trend.It overcomes air intake duct and starts
Machine mixture formation process it is not ideal enough to influence engine power performance and economy the shortcomings that, by the way that fuel oil is directly sprayed
The mode that gaseous mixture is formed in cylinder carrys out tissue burning, so that the generation type of gaseous mixture is more flexible.
Since the fuel spray of direct fuel-injection engine is easy to collide with cylinder wall or piston-top surface, and then fuel oil can be caused
Wet wall problem causes fuel economy and emission performance to deteriorate.In addition, the shorter air-fuel mixture time, be easy to cause gaseous mixture dense
Degree is unevenly distributed, and overrich or prozone domain occurs and burning is caused to deteriorate, therefore propose to the quality of gaseous mixture higher
It is required that.
And in fuel injection system, influence of the structure type of fuel injector to atomization quality is very big.Traditional in-cylinder direct-jet
Fuel injector can substantially be divided into three classes according to nozzle form, spiral-flow type, porous type and outward opening.Spiral-flow type fuel injector can only be
Compared with good spray cone could be formed under low environment back pressure, good gasoline atomizing effect is realized.When work, the atomization of gasoline
Quality is influenced seriously by injection pressure and environment back pressure.Porous type fuel injector has good oil spout stability, but needs
Higher injection pressure.Although outward opening fuel injector can form stable oil spout taper under lower oil spout, it is limited
Be not suitable for being widely used to promote in expensive cost.
In addition to this, air auxiliary direct-injection nozzle is because having the spy for realizing high quality atomizing effect under lower injection pressure
It puts and is more and more paid attention to.What such fuel injector sprayed is the mixture of fuel oil and air, so its spray characteristics has
Not in common high pressure direct injection nozzle.
Previous air-assisted fuel injector was one air-fuel mixture chamber of interior design in conventional fuel injector, by tradition
It is introduced directly into high pressure gas inside fuel injector, is directly sprayed after making fuel oil and high pressure gas mixed aerosol, such fuel-oil atmozation
Quality is preferable, can significantly improve cold start-up, improves fuel economy and reduces discharge.But it is arranged inside fuel injector mixed
The construction that chamber has changed conventional fuel injector completely is closed, manufacturing cost is increased.And it will receive environment since injection pressure is lower
The influence of back pressure, spray discharge pattern can't particularly be stablized, and volume production is not suitable for.
Summary of the invention
In view of the above circumstances, in view of the deficiencies of the prior art, the present invention proposes a kind of air-assisted atomization fuel injector and control
Method processed, introduces high pressure gas after intercooler, by fairing, carries out the fuel injector and control method of assisted atomization, energy
It is enough formed under lower injection pressure more stable injection characteristics and with good spray characteristics.
To achieve the above object, the technical scheme is that a kind of air-assisted atomization fuel injector, including fuel injector column
Body, plunger, the solenoid valve of fuel injector oil spout are equipped with petroleum pipeline in fuel injector cylinder side, and petroleum pipeline one end connects fuel oil
Channel, the other end are connected to the oil pocket of plunger base；The fuel injector cylinder other side is equipped with auxiliary air channel, and auxiliary air is logical
Road one end connecting gas transmission pipe, the other end are connected in the rectification shell of fuel injector cylinder and radome fairing composition；Rectification shell is passed through height
It calms the anger body, the gasoline of high pressure gas and penetrating meets in outside, carries out assisted atomization, can optimize atomization quality.
Further, collector ring, flow-disturbing ring are set gradually in the rectification shell from top to bottom, collector ring makes gas flowing more
Stablize, flow-disturbing ring accelerates gas disturbance, is easily formed turbulent flow, accelerates the breakup of drop, promotes atomizing effect.
Further, the appendix connects intercooler by check valve, electromagnetic switch valve, directly from engine with supercharger
Cooler introduces gas source.
Further, the electromagnetic switch valve, fuel injector oil spout solenoid valve be separately connected ECU.
A kind of control method of air-assisted atomization fuel injector, under the different operating conditions of engine, the ECU is according to various
Sensor obtains air input of engine by air, throttle opening, revolving speed, coolant temperature and intake air temperature parameter, judges engine
Required distributive value and oil injection time；When air-assisted atomization fuel injector is by fuel injection signal, the ECU control electromagnetism is opened
The solenoid valve for closing valve and fuel injector oil spout opens simultaneously, and high pressure gas is by entering oil spout by check valve and auxiliary air channel
Gasoline in the rectification shell of device, while in fuel injector sprays, and meets with the high pressure gas in auxiliary air channel, broken rapidly
Broken, atomization, reduces fuel oil partial size, and then, after high pressure gas is using collector ring, gasoline again passes by flow-disturbing ring and ejection
Gasoline meets, and high pressure gas continues atomization and dispels gasoline, under the strong disturbance effect of air-flow, the oil-gas film fragmentation of ejection, mist
Turn to smaller oil droplet.
Beneficial effects of the present invention:
1. the assisted atomization structure of fuel injector meets aerodynamics, the spray characteristics of fuel injector are optimized, improve hair
The working efficiency of motivation.
2. fuel injector influenced by environment back pressure it is small, can be formed in-cylinder combustion needs spray discharge pattern.
3. fuel injector structure is simple, manufacturing cost is lower.
4. the incorporation way of assisted atomization gas source is simple, gas source is sufficient.
Detailed description of the invention
Fig. 1 is air-assisted atomization fuel injector structure main view of the invention；
Fig. 2 is air-assisted atomization fuel injector device schematic diagram of the invention；
Fig. 3 is the schematic diagram of collector ring in air flue；
Fig. 4 is the schematic diagram of flow-disturbing ring in air flue；
Fig. 5 is the flow chart of air-assisted atomization fuel injector control method.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
As shown in Figure 1, the invention proposes one kind to introduce high pressure gas after intercooler, by fairing, carry out auxiliary
The fuel injector and control method of atomization are helped, specific structure is by petroleum pipeline 7, appendix 1, fuel gallery 8, auxiliary air channel 2, electricity
The parts groups such as magnetic switch valve 6, fuel injector cylinder 4, plunger 5, spring 9, radome fairing 10, collector ring 11, flow-disturbing ring 12, check valve 3
At.
There is a plunger 5,5 upper end of plunger is connected with spring 9, and fuel injector cylinder is equipped in 4 side in fuel injector cylinder 4
Petroleum pipeline 7,7 one end of petroleum pipeline connect fuel gallery 8, and the other end is connected to the oil pocket of 5 bottom of plunger；4 other side of fuel injector cylinder
Equipped with auxiliary air channel 2,2 one end connecting gas transmission pipe 1 of auxiliary air channel, the other end is connected to fuel injector cylinder 4 and radome fairing
In the rectification shell of 10 compositions.Collector ring 11, flow-disturbing ring 12 are set gradually from top to bottom in rectification shell.Appendix 1 passes through list
Intercooler is connected to valve 3, electromagnetic switch valve 6.
As shown in Fig. 2, electromagnetic switch valve is arranged among appendix 1, ECU is separately connected electromagnetic switch valve and fuel injector oil spout
Solenoid valve.
As shown in Figure 1, 2, 3, when the cylinder of engine starts air inlet, ECU according to various sensors obtain engine into
The solenoid valve of the parameters such as tolerance, throttle opening, revolving speed, coolant temperature, intake air temperature, control fuel injector oil spout is opened and is closed
It closes.When the solenoid valve of ECU control fuel injector oil spout is opened, when fuel injector commencement of fuel injection in cylinder, due to being set among appendix
The electromagnetic switch valve set is consistent with the solenoid valve connection type of fuel injector oil spout with the connection type of ECU, the electromagnetism in appendix
Switch valve is also opened simultaneously.In induction stroke latter stage, there are negative pressure in cylinder, high pressure gas flows downward rapidly, by check valve
3, auxiliary air channel 2, into fuel injector rectification shell, while the gasoline in fuel injector sprays, in auxiliary air channel
High pressure gas meet, broken rapidly, atomization, fuel oil partial size reduces, when high speed oil gas mixture continues to gas In-Cylinder Flow, with
Air is mixed again, is atomized in cylinder.Such method increases an assisted atomization process, is formed effectively convenient for fuel oil and air
It mixes to meet the requirement of homogeneous combustion.The phenomenon that later period in-cylinder pressure is excessive in order to prevent, causes assisted atomization gas backstreaming,
The mechanism of check valve 3 is increased in appendix.
As shown in Figure 4,5, collector ring, flow-disturbing ring are increased in auxiliary air channel.From the intercooler of engine with supercharger it
After introduce high pressure gas, gas passes through solenoid valve 6, and check valve 3 introduces the steady of gas into auxiliary air channel 2 in order to optimize
It is qualitative, increase rectification ring mechanism first, structure is further added by as shown in figure 4, before gas will meet with the gasoline of ejection
One flow-disturbing ring mechanism, structure accelerate the broken of gasoline, improve mist as shown in figure 5, high-speed gas is made to form turbulent flow
Change quality.
Claims (5)
1. a kind of air-assisted atomization fuel injector, including fuel injector cylinder, plunger, the solenoid valve of fuel injector oil spout, the oil spout
Petroleum pipeline is equipped in device cylinder side, petroleum pipeline one end connects fuel gallery, and the other end is connected to the oil pocket of plunger base, feature
Be: the fuel injector cylinder other side is equipped with auxiliary air channel, auxiliary air channel one end connecting gas transmission pipe, and the other end connects
In the rectification shell of logical fuel injector cylinder and radome fairing composition；Rectification shell is passed through high pressure gas, the vapour of high pressure gas and penetrating
Oil meets in outside, carries out assisted atomization, can optimize atomization quality.
2. air-assisted atomization fuel injector according to claim 1, it is characterised in that: in the rectification shell from top to bottom
Collector ring, flow-disturbing ring are set gradually, collector ring keeps gas flowing more stable, and flow-disturbing ring accelerates gas disturbance, it is easily formed turbulent flow,
Accelerate the breakup of drop, promotes atomizing effect.
3. air-assisted atomization fuel injector according to claim 1, it is characterised in that: the appendix by check valve,
Electromagnetic switch valve connects intercooler, directly introduces gas source after the intercooler in engine with supercharger.
4. air-assisted atomization fuel injector according to claim 3, it is characterised in that: the electromagnetic switch valve, fuel injector
The solenoid valve of oil spout is separately connected ECU.
5. a kind of control method of air-assisted atomization fuel injector as claimed in claim 4, it is characterised in that: engine not
With under operating condition, the ECU according to various sensors obtain air input of engine by air, throttle opening, revolving speed, coolant temperature with into
Gas temperature parameter judges distributive value and oil injection time required for engine；When air-assisted atomization fuel injector is by oil spout
When signal, the solenoid valve of the ECU control electromagnetic switch valve and fuel injector oil spout is opened simultaneously, and high pressure gas passes through by unidirectional
Valve and auxiliary air channel enter in the rectification shell of fuel injector, while the gasoline in fuel injector sprays, with auxiliary air channel
Interior high pressure gas meets, and broken rapidly, atomization reduces fuel oil partial size, then, after high pressure gas is using collector ring, vapour
Oil again passes by flow-disturbing ring and the gasoline of ejection meets, and high pressure gas continues atomization and dispels gasoline, makees in the strong disturbance of air-flow
Under, the fragmentation of oil-gas film, the atomization of ejection are smaller oil droplet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910360262.1A CN110107437A (en) | 2019-04-30 | 2019-04-30 | Air-assisted atomization fuel injector and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910360262.1A CN110107437A (en) | 2019-04-30 | 2019-04-30 | Air-assisted atomization fuel injector and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110107437A true CN110107437A (en) | 2019-08-09 |
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ID=67487782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910360262.1A Pending CN110107437A (en) | 2019-04-30 | 2019-04-30 | Air-assisted atomization fuel injector and control method |
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| Country | Link |
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| CN (1) | CN110107437A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279889A (en) * | 2021-05-24 | 2021-08-20 | 浙江吉利控股集团有限公司 | Air auxiliary injection system for engine, cold start control method and vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5983865A (en) * | 1997-05-23 | 1999-11-16 | Honda Giken Kogyo Kabushiki Kaisha | Air-fuel mixture valve and method of determining magnetic force of electromagnetic coil for opening the air-fuel mixture valve |
| CN102734032A (en) * | 2012-06-19 | 2012-10-17 | 浙江大学 | High-pressure air-assisted fuel oil spray device |
| CN104379921A (en) * | 2012-03-29 | 2015-02-25 | 联邦科学与工业研究组织 | Injection of heavy and particulate laden fuels |
| CN104755738A (en) * | 2012-09-25 | 2015-07-01 | 恩吉迪克斯有限责任公司 | Two step metering solenoid for fuel atomizer |
| CN205908371U (en) * | 2016-08-17 | 2017-01-25 | 李广齐 | Highly -compressed air fuel explosive motor |
-
2019
- 2019-04-30 CN CN201910360262.1A patent/CN110107437A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5983865A (en) * | 1997-05-23 | 1999-11-16 | Honda Giken Kogyo Kabushiki Kaisha | Air-fuel mixture valve and method of determining magnetic force of electromagnetic coil for opening the air-fuel mixture valve |
| CN104379921A (en) * | 2012-03-29 | 2015-02-25 | 联邦科学与工业研究组织 | Injection of heavy and particulate laden fuels |
| CN102734032A (en) * | 2012-06-19 | 2012-10-17 | 浙江大学 | High-pressure air-assisted fuel oil spray device |
| CN104755738A (en) * | 2012-09-25 | 2015-07-01 | 恩吉迪克斯有限责任公司 | Two step metering solenoid for fuel atomizer |
| CN205908371U (en) * | 2016-08-17 | 2017-01-25 | 李广齐 | Highly -compressed air fuel explosive motor |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113279889A (en) * | 2021-05-24 | 2021-08-20 | 浙江吉利控股集团有限公司 | Air auxiliary injection system for engine, cold start control method and vehicle |
| CN113279889B (en) * | 2021-05-24 | 2022-05-17 | 浙江吉利控股集团有限公司 | Air auxiliary injection system for engine, cold start control method and vehicle |
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Application publication date: 20190809 |