CN2825992Y

CN2825992Y - Umbrella spray type micro-displacement oil spray nozzle

Info

Publication number: CN2825992Y
Application number: CN 200520115480
Authority: CN
Inventors: 侯德洋
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-07-18
Filing date: 2005-07-18
Publication date: 2006-10-11
Anticipated expiration: 2015-07-18

Abstract

The utility model relates to an umbrella spray type micro-displacement oil spray nozzle, which belongs to an oil spray device of a fuel system of an internal combustion engine. Since the umbrella spray type micro-displacement oil spray nozzle is provided with an internal cone angle on an outlet position of an oil spray hole; when spraying is conducted, under the guide action of the internal cone angle, umbrella-shaped oil bundles are easy to control to arrive at a designated region of a combustion chamber, and penetrating distance of the oil bundles is caused to be increased. Thus, the utility model can give full play to the advantages that the atomizing oil particles of umbrella spraying are fine, and pre-mixing combustion of the engine is easy to organize. The utility model can cause combustion of the engine to be sufficient; carbon smoke can be conspicuously reduced, and combustion temperature and NOx can be reduced. The utility model is favorable for further increase of economy, discharge performance and power performance of the engine.

Description

Umbrella spray micrometric displacement oil nozzle

Technical field

The utility model relates to a kind of umbrella spray micrometric displacement oil nozzle, and it belongs to the fueling injection equipment of fuel of internal combustion engine system.

Background technique

In the last hundred years, people succeed in developing different combustion system of diesel engine.With regard to its characteristics, most systems are diffusive combustions.Because the formation of diffusive combustion mixed gas is extremely inhomogeneous, thereby has the smoke evacuation that is difficult to overcome and the contradiction between NOx.In recent years, along with the development of technology such as automatically controlled and high-pressure injection, the burning and the discharging of diesel engine are greatly improved, but that the essential problem of diffusive combustion still has is to be solved.The target of bump combustion chamber (HCCI) is to form homogeneous charge before catching fire, and eliminates diffusive combustion, so the potentiality of eliminating soot simultaneously and reducing NOx are arranged.But the subject matter that present HCCI faces is to be difficult to control catch fire initial point and rate of burning, can only normally move under the part operating mode, thereby practical application is faced with very big challenge.Chinese scholar has proposed the thought of warm premixing combination burning, and promotes even mixing (Chinese patent: 86104093,90106022) with the umbrella oil nozzle.Umbrella spray burning better performances under low-load, but high load easily produces black smoke down, and fast because of umbrella spray oil-supply speed, spraying runs through apart from less, is difficult to control the spatial and temporal distributions of oil gas under the high load.In order to promote the formation of even mixed gas, adopt a plurality of thin oilhole oil sprayers and high-pressure injection in the world usually, but the meticulous flow resistance of oilhole increases and easily obstruction, the too high then oil pump power consumption of jet pressure increases, and the cost of high-pressure injection system also improves thereupon.A kind of oil sprayer with uniform atomizing of good process and reliability has important environmental protection and energy-saving significance undoubtedly.

Summary of the invention

In order to overcome the shortcoming that prior art exists, eliminate the diffusive combustion of diesel engine, organize the warm premixing combination burning, the utility model provides a kind of umbrella spray micrometric displacement oil nozzle, this micrometric displacement oil nozzle should spray into the firing chamber to the oil mass of a corresponding load of work cycle of motor in umbrella spray mode, and the atomization quality height improves inflammable mixture and forms, make the sufficient combustion of motor and perfect, the economic performance, emission performance and the power performance that help motor further improve.This micrometric displacement oil nozzle can be used for diesel engine with direct injection, also can be used for G. D. I engine, or other substitute fuel internal-combustion engines.

The technological scheme that its technical problem that solves the utility model adopts is: a kind of umbrella spray micrometric displacement oil nozzle, one pair of precision pair that it is made up of needle-valve and needle-valve body, between needle-valve and needle-valve body, be provided with the cone seal section, be provided with a nozzle opening in the underpart of needle-valve body, the head of this nozzle opening and needle-valve forms a ring-type nozzle opening.Be provided with interior cone angle 2 α in the exit position of needle-valve body underpart nozzle opening.The angular bisector of interior cone angle 2 α is consistent with the center line of needle-valve, or becomes the β angle with the center line of needle-valve, and β is 0～30 degree.Above-mentioned interior cone angle 2 α are 60～160 degree.

The guiding theory of technique scheme is: owing to be provided with an interior cone angle in the exit position of nozzle opening, under of the leading role of when spraying umbrella shape oil bundle at interior cone angle, be easy to control the appointed area that the oil bundle arrives the firing chamber, make running through of oil bundle, so more can give full play to the thin advantage of umbrella atomization elaioleucite apart from increasing.

The beneficial effects of the utility model are: this micrometric displacement oil nozzle is owing to be provided with an interior cone angle in the exit position of nozzle opening, under of the leading role of when spraying umbrella shape oil bundle at interior cone angle, be easy to control the appointed area that the oil bundle arrives the firing chamber, the range of oil bundle is increased, so more can give full play to the thin advantage of umbrella atomization elaioleucite, be easy to organize the motor pre-mixing combustion.Make the sufficient combustion of motor and perfect, significantly reduced soot, reduced combustion temperature and NOx, help the further raising of Economy, emission performance and the power character of motor.

Description of drawings

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is a kind of structural drawing of umbrella spray micrometric displacement oil nozzle.

Fig. 2 is the interior cone angle symmetric arrangement head enlarged view of the nozzle opening of micrometric displacement oil nozzle shown in Figure 1.

Fig. 3 is the interior cone angle asymmetric arrangement head enlarged view of the nozzle opening of micrometric displacement oil nozzle.

The head enlarged view of micrometric displacement oil nozzle when Fig. 4 is Fig. 2 maximum needle lift.

Among the figure: 1, needle-valve, 2, needle-valve body, 3, the cone seal section, 4,4a, 4b, ring-type nozzle opening.

Embodiment

In the embodiment shown in Fig. 1,2,3,4, one pair of precision pair that this umbrella spray micrometric displacement oil nozzle is made up of needle-valve 1 and needle-valve body 2 is provided with cone seal section 3 between needle-valve 1 and needle-valve body 2.Be provided with a nozzle opening in the underpart of needle-valve body 2, it is 130 degree that the exit position of nozzle opening is provided with interior cone angle 2 α, and the top of interior cone angle is an inner cylindrical surface.The head of needle-valve 1 is provided with an external cylindrical surface, and external cylindrical surface and inner cylindrical surface are for movingly.The nozzle opening of the underpart of the head of needle-valve 1 and needle-valve body 2 forms a ring-type nozzle opening 4.The maximum lift of needle-valve 1 is 150 μ m, and the diameter of needle-valve 1 external cylindrical surface is 1.5mm.Fig. 2, the 4th, cone angle is a symmetric arrangement in the nozzle opening of umbrella spray micrometric displacement oil nozzle, promptly the angular bisector of interior cone angle 2 α is consistent with the center line of needle-valve 1, so ring-type nozzle opening 4 is prismatic circumferentially.Fig. 3 is the interior cone angle asymmetric arrangement of nozzle opening of umbrella spray micrometric displacement oil nozzle, the center line of the angular bisector of cone angle 2 α and needle-valve 1 β that has angle promptly, therefore ring-type nozzle opening 4 circumferentially is a non-constant section, and the cross section at 4a and 4b place is visibly different as shown in FIG..

Claims

1, a kind of umbrella spray micrometric displacement oil nozzle, one pair of precision pair that it is made up of needle-valve (1) and needle-valve body (2), between needle-valve (1) and needle-valve body (2), be provided with cone seal section (3), be provided with a nozzle opening in the underpart of needle-valve body (2), the head of this nozzle opening and needle-valve (1) forms a ring-type nozzle opening (4), it is characterized in that: be provided with interior cone angle 2 α in the exit position of needle-valve body (2) underpart nozzle opening.

2, according to the described umbrella spray of claim 1 micrometric displacement oil nozzle, it is characterized in that: the angular bisector of interior cone angle 2 α is consistent with the center line of needle-valve (1), or becomes the β angle with the center line of needle-valve (1), and β is 0～30 degree.

3, according to the described umbrella spray of claim 2 micrometric displacement oil nozzle, it is characterized in that: above-mentioned interior cone angle 2 α are 60～160 degree.