CN102434345A - Electronically controlled fuel injector of diesel engine with turbulence air chamber - Google Patents
Electronically controlled fuel injector of diesel engine with turbulence air chamber Download PDFInfo
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- CN102434345A CN102434345A CN201110366480XA CN201110366480A CN102434345A CN 102434345 A CN102434345 A CN 102434345A CN 201110366480X A CN201110366480X A CN 201110366480XA CN 201110366480 A CN201110366480 A CN 201110366480A CN 102434345 A CN102434345 A CN 102434345A
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- fuel
- oil
- fuel injector
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Abstract
The invention discloses an electronically controlled fuel injector of a diesel engine with a turbulence air chamber; a fuel injection nozzle is arranged on the center line of a fuel injector body, the front end of the fuel injection nozzle is a spherical surface, a circle of 8 small taper angle fuel holes 3 are evenly arranged around the center of the fuel injection nozzle on the spherical surface. The diameter of the circle formed by the centers of 8 small taper angle fuel holes is D which is equal to 2.5 mm, the included angle alpha of the center of each fuel hole and the central axis line of the fuel injector is equal to 22.5 degrees, the included angle theta of the centers of each two fuel holes which are symmetrical to the center of the fuel injector is equal to 45 degrees. By adopting the fuel injector, the engine with the turbulence air chamber can directly adopt an electronically controlled high-pressure common rail and systematically combine the characteristics of low noise and smooth work of the engine with the turbulence air chamber and the advantages of precise injection control of the high-pressure common rail, so as to achieve good fuel-oil atomization effect. As an fuel oil pocket sprayed by the taper angle fuel holes is fine, so as to be fully mixed with the air, enable oil mist to be burned uniformly in a main combustion chamber and an assistant combustion chamber, effectively reduce emission load of NOX and carbon black particles; moreover, the engine discharge meets the national IV requirements.
Description
Technical field:
The invention belongs to engine components, be specifically related to a kind of device of diesel injector.
Background technique:
At present swirl combustion formula motor all adopts axial needle type injector, and the existing defective of this oil sprayer fuel system is by Injection Pump control oil spout, thus to oil spout constantly and fuel injection quantity be difficult to accomplish accurate control.High pressure co-rail diesel machine oil spout mode is science comparatively, but this electric-controlled fuel injector only is fit to direct injection ic engine, and is not suitable for turbulence-chamber engine.How the oil spout mode with the high pressure co-rail diesel machine is applicable to turbulence-chamber engine, and promptly this oil sprayer both had been fit to high-pressure common rail, can also satisfy the requirement of turbulence-chamber engine, the object of the invention that Here it is place.The present invention is through nozzle hole number, injection diameter and the adjustment oil sprayer oilhole cone angle of design oil sprayer; Make the fuel oil of ejection can as axial needle type injector, satisfy the requirement of vortex chamber; Can guarantee again the oil spout moment and fuel injection quantity control, thus Economy, power character, the emission level of raising diesel engine.
Summary of the invention:
The purpose of this invention is to provide a kind of high-pressure common rail that both had been fit to, can satisfy the diesel injector of turbulence-chamber engine requirement again.
Below in conjunction with accompanying drawing theory structure of the present invention is explained.Swirl chamber diesel electric-controlled fuel injector, its technological scheme be, oil nozzle is installed on the injector body center line, and the front end of oil nozzle is a sphere.Key is on sphere, to be provided with one around the oil nozzle center to enclose equally spaced 8 small-angle oilholes; And the circle diameter D=2.5mm that constitutes by 8 small-angle oilhole centers of circle; Each oilhole center and oil sprayer central axis angle=22.5 °; With the angle at centrosymmetric per two the small-angle oilhole centers of oil sprayer, also can be described as spray cone angle θ=45 °.Injector body is fixed on cylinder of diesel engine and covers, and oil nozzle protrusion vortex chamber certain height guarantees that fuel oil is sprayed onto in the vortex chamber.The oil nozzle oilhole adopts the small-angle structure, makes the oil bundle of the diameter of ejection oil bundle less than the ejection of main jet hole, vortex chamber, and can guarantee that the oil bundle moves along airflow direction, satisfies the designing requirement of turbulence-chamber engine to oil sprayer.This oil sprayer can through ECU to oil sprayer oil spout accurately control.
The beneficial effect of characteristics of the present invention and generation is: the oil sprayer of this structural type makes turbulence-chamber engine directly can adopt Electrocontrolled high-pressure common rail; Combine the advantage of smooth-going characteristics of turbulence-chamber engine low noise work and the accurate oil spout control of high-pressure common rail, finally make fuel atomization effect good.Because the oil bundle of small-angle oilhole ejection is very trickle, can be abundant with air mixing, institute effectively reduce the discharge amount of NOX and carbon soot particles, and engine emission satisfies state IV requirement so that mist of oil is even in main and auxiliary combustor's internal combustion.
Description of drawings:
Shown in accompanying drawing be structure principle chart of the present invention.
Embodiment:
Following with reference to accompanying drawing and combine embodiment that the present invention is further described.Swirl chamber diesel electric-controlled fuel injector (like Fig. 1); Its structure is that oil nozzle 2 is installed on injector body 1 center line; The front end of oil nozzle is a sphere, on sphere, is provided with equally spaced 8 the small-angle oilholes 3 of a circle, the circle diameter D=2.5mm that is made up of 8 small-angle oilhole centers of circle around the oil nozzle center; Each oilhole center and oil sprayer central axis angle=22.5 ° are with angle (spray cone angle) θ at centrosymmetric per two the oilhole centers of oil sprayer=45 °.Oil nozzle 2 is at the setting height(from bottom) H=16.3mm of injector body 1, oil nozzle spherical radius R=1.6mm, and small-angle oilhole 3 diameters are 0.16mm.
Oil sprayer is injected the vortex chamber with fuel oil; Owing to adopted small-angle, spray along airflow direction, guaranteed the requirement of the oily Shu Fuhe vortex chamber of ejection; Unburned mist of oil gets into main combustion chamber along the major-minor spray orifice; Fuel oil is fully burned, because oil sprayer has automatical control system, can guarantee the control to oil mass and injection time simultaneously.The present invention verifies enforcement on the CYQD80-CE4 diesel engine, engine calibration power 96KW/3600r/min, and moment of torsion 310N.m, emission level reach state IV, delivery temperature≤690 ℃, noise level limit≤96dB (A).Effectively reduce the discharge amount of NOX and carbon soot particles.
Claims (2)
1. swirl chamber diesel electric-controlled fuel injector; It is characterized in that oil nozzle (2) is installed on injector body (1) center line; The front end of oil nozzle is a sphere, on sphere, is provided with circle equally spaced 8 small-angle oilholes (3), the circle diameter D=2.5mm that is made up of 8 small-angle oilhole centers of circle around the oil nozzle center; Guarantee each oilhole center and oil sprayer central axis angle=22.5 °, with angle theta=45 at centrosymmetric per two the oilhole centers of oil sprayer °.
2. according to the described swirl chamber diesel electric-controlled fuel injector of claim 1; It is characterized in that the setting height(from bottom) H=16.3mm of said oil nozzle (2) in said injector body (1); Oil nozzle spherical radius R=1.6mm, said small-angle oilhole (3) diameter is 0.16mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110366480XA CN102434345A (en) | 2011-11-17 | 2011-11-17 | Electronically controlled fuel injector of diesel engine with turbulence air chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110366480XA CN102434345A (en) | 2011-11-17 | 2011-11-17 | Electronically controlled fuel injector of diesel engine with turbulence air chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102434345A true CN102434345A (en) | 2012-05-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110366480XA Pending CN102434345A (en) | 2011-11-17 | 2011-11-17 | Electronically controlled fuel injector of diesel engine with turbulence air chamber |
Country Status (1)
| Country | Link |
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| CN (1) | CN102434345A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228262A (en) * | 2020-09-30 | 2021-01-15 | 江苏大学 | Diesel injector based on nozzle inner vortex cavitation induction hollow spraying structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0893601A (en) * | 1994-09-22 | 1996-04-09 | Zexel Corp | Fuel injection nozzle |
| CN100467855C (en) * | 2003-10-01 | 2009-03-11 | 丰田自动车株式会社 | Fuel injection valve |
| JP2010185324A (en) * | 2009-02-11 | 2010-08-26 | Denso Corp | Fuel injection valve |
| JP2011001864A (en) * | 2009-06-18 | 2011-01-06 | Hitachi Automotive Systems Ltd | Fuel injection valve |
-
2011
- 2011-11-17 CN CN201110366480XA patent/CN102434345A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0893601A (en) * | 1994-09-22 | 1996-04-09 | Zexel Corp | Fuel injection nozzle |
| CN100467855C (en) * | 2003-10-01 | 2009-03-11 | 丰田自动车株式会社 | Fuel injection valve |
| JP2010185324A (en) * | 2009-02-11 | 2010-08-26 | Denso Corp | Fuel injection valve |
| JP2011001864A (en) * | 2009-06-18 | 2011-01-06 | Hitachi Automotive Systems Ltd | Fuel injection valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112228262A (en) * | 2020-09-30 | 2021-01-15 | 江苏大学 | Diesel injector based on nozzle inner vortex cavitation induction hollow spraying structure |
| CN112228262B (en) * | 2020-09-30 | 2022-07-22 | 江苏大学 | Diesel injector based on nozzle internal vortex cavitation induction hollow spraying structure |
| US11614061B2 (en) | 2020-09-30 | 2023-03-28 | Jiangsu University | Diesel fuel injector based on hollow spray structure induced by vortex cavitation in nozzle |
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Application publication date: 20120502 |