CN100472061C - Atomizing-intensified electric control oil-spraying device - Google Patents
Atomizing-intensified electric control oil-spraying device Download PDFInfo
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- CN100472061C CN100472061C CNB200710027274XA CN200710027274A CN100472061C CN 100472061 C CN100472061 C CN 100472061C CN B200710027274X A CNB200710027274X A CN B200710027274XA CN 200710027274 A CN200710027274 A CN 200710027274A CN 100472061 C CN100472061 C CN 100472061C
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- fuel injector
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Abstract
The invention is an electric controlled oil sprayer intensifying pulverization, for electric controlled spray of engine fuel oil, comprising: routing electric spray nozzle, and characterized in that: the position of fuel oil passage on one side of orifice plate of the electric controlled oil sprayer is equipped with piezoelectric ceramic oscillator; the oscillator is connected with a supersonic signal generator and the supersonic signal generator is controlled by ECU of the engine and generates supersonic oscillation signal with pulse signal; the electric controlled oil sprayer is added with a supersonic pulverizer on the basis of the routine electric spray nozzle, not changing the structure of the original engine fuel oil supply system, but the supersonic oscillation can further intensify fuel oil pulverization, so as to raise thermal efficiency of engine and reducing tail gas pollution.
Description
Technical field
The present invention relates to the electronic fuel injection device of fuel engine, particularly a kind of electric-controlled fuel injector that utilizes ultrasound to strengthen fuel-oil atmozation.
Background technique
The fuel system of fuel engine mainly contains two kinds of carburetor type and jet-types.Motor car engine for example, traditional motor car engine adopts the Carburetor mode.It utilizes air communication to cross the carburetion trunnion and produces degree of vacuum, makes the atomizing of fuel oil pressure reduction and the atomizing of splashing.With the fuel that the Carburetor mode atomizes, its oil mist particles is bigger than normal, and inhomogeneous, causes fuel economy, emission performance deviation.Automobile generally adopts electric-controlled fuel injector (being commonly called as electric injector) fuel feeding at present.Engine electric-controlled unit ECU (electronic control unit) is according to parameters such as engine intake airflow, intake pipe absolute pressure, rotating speed, intake temperature, throttle positions, and the break-make of control electric injector sprays into cylinder with fuel oil.Its fuel atomization effect has obviously obtained enhancing, thereby has improved fuel economy, power character and the emission performance of Motor Vehicle.But still there is the inhomogeneous and emission pollution problem of atomizing in electric control fuel oil jet system, and along with society is improving the requirement of fuel economy and exhaust emission, electric-controlled fuel injector also needs further to improve.
The end of electric injector has a jet orifice plate, and fuel oil is to pass through spray orifice under certain pressure condition, is injected into vaporific.Its atomizing situation is relevant with pressure and injection diameter, and generally speaking, the aperture of spray orifice is more little, and it is good more to atomize; Oil pressure before spraying is high more, and it is good more to atomize.0.1mm can be accomplished in the aperture of nozzle at present, if further reduce the aperture, then is subject to processing the restriction of technology and cost of production.In addition, injection diameter is too small, and the anti-ability of stopping up of its antipollution reduces, and is then higher to fuel qualities; Improve fuel-injection pressure, then higher to the requirement of oil sprayer element precision and oil supply system.Thisly simple its passivity and deficiency have been demonstrated by raising injection pressure or the scheme that reduces injection diameter.If will obviously improve the fuel economy and the exhaust index of motor again, need find a new way.
Ultrasonic atomization has caused that as a kind of novel atomization technique people pay close attention to.Utilizing the existing patent No. of ultrasonic atomizatio fuel oil is a plurality of Chinese patents such as 95113315,96103306.These patents are still continued to use the theory of Carburetor.It can not solve the accurate control problem of air fuel ratio.Simultaneously, motor must be done bigger change to the structure of oil supply system for adapting to the atomizing of this mode.So the difficulty of its application is very big.
Summary of the invention
The present invention is intended to provide a kind of electric-controlled fuel injector with ultrasound enhancing fuel atomization, is beneficial to improve the fuel economy of motor, reduces pollution emission.
The electric-controlled fuel injector of enhancing atomizing of the present invention, comprise conventional electric-controlled fuel injector, at the place, fuel gallery of jet orifice plate one side of electric-controlled fuel injector piezoelectric constant vibration device is housed, piezoelectric constant vibration device is electrically connected with the supersonic signal generator of being controlled by engine electronic control unit (ECU).
The electric-controlled fuel injector of enhancing atomizing of the present invention at the place, fuel gallery of jet orifice plate one side, has been installed piezoelectric constant vibration element.Fuel oil is atomized under the sonic oscillation environment when flowing through this place of passage.Because the work of electric-controlled fuel injector is controlled by engine electric-controlled unit ECU (electronic control unit), supersonic signal generator also is controlled by ECU, and it is with the fuel injection pulse signal generation oscillator signal of ECU.Parameters such as the charge flow rate of the real-time detection of engine of ECU (Electrical Control Unit), suction pressure, temperature, throttle position, coolant temperature are controlled oil spout or are stopped.Thereby installed ultrasonic atomizing device additional and also do not influenced the fuel-air ratio that motor is realized by former designing institute.In the folding of ECU control valve, the pulse signal of control supersonic signal generator and the on-off action basic synchronization of oil sprayer make it atomizing to the fuel oil sonic oscillation.
Piezoelectric constant vibration element and supersonic signal generator have been installed in the present invention additional on conventional electric injector.That is, on the basis of the pressure reduction of original ejecting system atomizing, added a sonic oscillation atomizing again.Thereby the atomizing that can make fuel oil is more abundant, oil mist particles is littler, and is beneficial to the thermal efficiency that improves motor, reduces the discharging of flue dust, carbon monoxide and nitrogen oxide, is beneficial to environmental protection.In addition, be near the sonic oscillation of spray orifice, have cleaning action, can avoid spray orifice fouling, the obstruction of minor diameter, can keep the spray orifice stability of flow, and reduce requirement fuel qualities to spray orifice.Because this patent just installs ultrasonic atomizing device additional on the basis of former electric injector, it does not change the structure of motor original oil supply system, thereby electric-controlled fuel injector of the present invention do not influence fuel oil, air ratio that motor is realized by former designing institute, its installation, use all extremely simple.Even original conventional electric injector is pulled down in the used car maintenance, the electric injector of the present invention that changes the outfit gets final product.
Description of drawings
Fig. 1 principle schematic of the present invention
The sectional drawing of the described electric-controlled fuel injector of Fig. 2
The sectional drawing of the described electric-controlled fuel injector of Fig. 3
Fig. 4,5,6, the 7th, the K of Fig. 3-K sectional view
Embodiment
Embodiment one, as Fig. 2
By housing 1, electromagnetic coil 4, needle 5, the electric-controlled fuel injector B of the routine that jet orifice plate 9 grades constitute is equipped with ringwise piezoelectric constant vibration device 7 at the place, fuel gallery in jet orifice plate 9 outsides.Because of the physical dimension difference of the conventional electric injector of various models, the internal diameter size of piezoelectric constant must coincide with fuel gallery 10, but outside dimension may be restricted.Limited as its outside dimension, then the volume of piezoelectric constant is less than normal, the voltage that needs to improve power supply just can satisfy desired amplitude, for avoiding required operational voltage value higher, can locate an above piezoelectric constant vibration device 7 arranged side by side in the fuel gallery, present embodiment is that two piezoelectric constant vibration devices 7 are installed side by side, so that be issued to required amplitude in suitable operating voltage.
ECU (Electrical Control Unit) ECU links to each other with electromagnetic coil 4 electricity by the electromagnetic coil socket 2 on the housing.There is piezoelectric constant socket 3 that piezoelectric constant vibration device 7 can be linked to each other with supersonic signal generator A electricity on the housing in addition.Supersonic signal generator A is a prior art, and it links to each other with ECU electricity and by its control.Supersonic signal generator A sends oscillator signal to piezoelectric constant after detecting the rising edge of fuel injection pulse signal, makes fuel-oil atmozation; When fuel injection duration to and during the cutoff solenoid electric energy, with the valve sealing, and after supersonic signal generator A detected the trailing edge of fuel injection pulse signal, time-delay certain hour (longer slightly than valve rod fall time) cut off piezoelectric constant vibration signal again.
For whole fuel oils of the path 10 that guarantees to flow through all by supersonic oscillations, when ECU control injection valve is opened, connect supersonic signal generator, the utmost point after injection valve is closed still has a small amount of fuel oil not to be ejected as yet in the short time in the passage.That is, the pulse signal that supersonic signal generator A produces starts simultaneously with the fuel injection pulse signal of control electromagnetic coil, but ultrasonic signal pulse ratio fuel injection pulse postpones end, postpones the 0.5-3 millisecond and is advisable.
For improving the nebulization efficiency of sonic oscillation, two ends at piezoelectric constant vibration device 7 are equipped with front shroud 8 and back shroud 6 respectively, two cover plates have been executed impacting force to piezoelectric constant vibration device 8 when assembling, forward and backward cover plate is participated in and the amplification vibration, help improving nebulization efficiency.
Embodiment two, as Fig. 3
At the place, fuel gallery of jet orifice plate 9 inboards piezoelectric constant vibration device is housed, piezoelectric constant vibration device can be annular, or the combination of two arcs, as Fig. 4,5.Also can be rectangle, as Fig. 6,7.Present embodiment and embodiment's one difference is, aforementioned schemes be fuel before spray orifice, earlier by the vibration atomizing, improve the pressure reduction before and after the jet orifice plate.The scheme of present embodiment is that fuel oil is further by vibration again after the spray orifice atomizing.All the other are identical with embodiment one.
Should be pointed out that the present invention is not only applicable to gasoline-fueled electric-controlled fuel injector, also is applicable to the sparger with liquid fuels such as diesel oil, alcohol.
Claims (6)
1, a kind of electric-controlled fuel injector that strengthens atomizing, comprise conventional electric-controlled fuel injector, it is characterized in that, locate to be equipped with piezoelectric constant vibration device (7) in the fuel gallery (10) of jet orifice plate (9) one sides of electric-controlled fuel injector, piezoelectric constant vibration device (7) is electrically connected with the supersonic signal generator of being controlled by engine electronic control unit (ECU) (A).
2, the electric-controlled fuel injector of enhancing atomizing according to claim 1 is characterized in that (10) are located in the fuel gallery, and an above piezoelectric constant vibration device (7) is housed side by side.
3, the electric-controlled fuel injector of enhancing atomizing according to claim 1 is characterized in that, piezoelectric constant vibration device (7) is contained in the inboard or the outside of jet orifice plate (9).
4, the electric-controlled fuel injector of enhancing according to claim 1 atomizing is characterized in that, the two ends of piezoelectric constant vibration device (7) are equipped with front shroud (8) and back shroud (6) respectively, and two cover plates have been executed impacting force to the piezoelectric constant device (7) that vibrates.
5, the electric-controlled fuel injector of enhancing atomizing according to claim 1 is characterized in that, the piezoelectric constant socket (3) that piezoelectric constant vibration device (7) is electrically connected with supersonic signal generator (A) is arranged on the housing (1).
6, the electric-controlled fuel injector of enhancing atomizing according to claim 1, it is characterized in that, the pulse signal that supersonic signal generator (A) produces starts simultaneously with the fuel injection pulse signal of control electromagnetic coil, finishes but ultrasonic signal pulse ratio fuel injection pulse signal postpones the 0.5-3 millisecond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710027274XA CN100472061C (en) | 2007-03-23 | 2007-03-23 | Atomizing-intensified electric control oil-spraying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710027274XA CN100472061C (en) | 2007-03-23 | 2007-03-23 | Atomizing-intensified electric control oil-spraying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101025138A CN101025138A (en) | 2007-08-29 |
| CN100472061C true CN100472061C (en) | 2009-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710027274XA Expired - Fee Related CN100472061C (en) | 2007-03-23 | 2007-03-23 | Atomizing-intensified electric control oil-spraying device |
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| Country | Link |
|---|---|
| CN (1) | CN100472061C (en) |
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- 2007-03-23 CN CNB200710027274XA patent/CN100472061C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101025138A (en) | 2007-08-29 |
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Granted publication date: 20090325 Termination date: 20100323 |