CN115585085A

CN115585085A - Oil sprayer and fuel engine with same

Info

Publication number: CN115585085A
Application number: CN202110755885.6A
Authority: CN
Inventors: 朱斌宇
Original assignee: Vitesco Automotive Changchun Co Ltd
Current assignee: Vitesco Automotive Changchun Co Ltd
Priority date: 2021-07-05
Filing date: 2021-07-05
Publication date: 2023-01-10

Abstract

The invention discloses a fuel injector and a fuel engine with the fuel injector, wherein the fuel injector comprises a fuel injector shell, a fuel injector nozzle, a needle valve component, an electromagnet component and a return spring are arranged in the fuel injector shell, the needle valve component comprises a valve needle and a valve seat, the electromagnet component comprises an electromagnetic coil and an armature, the electromagnetic coil is arranged around the axis of the needle valve component, the armature is in action connection with the valve needle of the needle valve component, a jet orifice plate is arranged at the end side of the fuel injector nozzle and comprises at least one forming area and a flat mounting area, at least one jet orifice is constructed in the forming area, the forming area forms a non-zero angle alpha relative to the mounting area of the jet orifice plate, and the angle alpha is matched with the expected jet orifice orientation.

Description

Oil sprayer and fuel engine with same

Technical Field

The invention relates to the technical field of vehicles, in particular to a fuel injector and a fuel engine with the fuel injector.

Background

Fuel engine machines are widely used in various vehicles such as automobiles, and will continue to function for a considerable period of time. In a fuel engine, a fuel injector atomizes fuel so that the fuel is sufficiently combusted in a combustion chamber, which is an essential component of the fuel engine. With the increasing environmental pollution, people seek good dynamic performance and also put higher requirements on the fuel economy and the emission of the fuel engine.

The existing oil injector is generally provided with a plurality of spray holes at the end of a spray nozzle, and in the moving process of a valve body, the spray holes spray atomized fuel oil by controlling the opening and closing of an oil way to the spray holes, and the atomized fuel oil is mixed with air to form an oil-gas mixture. In order to improve fuel economy and reduce emissions, the spray cone angle and the drop point of the atomized fuel need to be optimized in a targeted manner, and therefore the spray angle and the beam penetration distance of the fuel need to be adjusted. At present, the change of the injection angle and the penetration distance of an oil jet is mainly realized by adopting a plane injection hole plate to punch an inclined hole. However, the range of the spraying angle is limited by the punching of the spraying hole plate, so that large-angle change is difficult to realize, and simultaneously, blanking burrs are generated at the edge after punching, and further processing and burr removal are needed.

Accordingly, it would be highly desirable to provide a fuel injector that overcomes the above-described problems associated with the prior art.

Disclosure of Invention

The invention provides an oil injector and a fuel engine with the same, and aims to solve one or more technical problems in the prior art. In the injector according to the invention, flexible change of the injection angle of the injector is realized by changing the shape of the injection hole plate, thereby improving the fuel economy and reducing the emission. In the solution of the invention, the injection angle control is stable and the variation is small. In addition, the processing and forming are simple, and the manufacturing cost is low.

One aspect of the invention relates to a fuel injector, comprising a fuel injector housing, a fuel injector in which a needle valve assembly, a solenoid assembly and a return spring are arranged, the needle valve assembly comprising a valve needle and a valve seat, the solenoid assembly comprising a solenoid coil, which is arranged around the axis of the needle valve assembly, and an armature, which is in operative connection with the valve needle of the needle valve assembly, wherein an injection orifice plate is arranged at the end face of the fuel injector, which injection orifice plate comprises at least one profiled region, in which at least one injection orifice is formed, and a flat mounting region, wherein the profiled region forms a non-zero angle α with respect to the mounting region of the injection orifice plate, the value of the angle α matching the desired injection orifice orientation.

In the solution according to the invention, the nozzle plate comprises at least two regions, one of which is a flat mounting region which is parallel to the plane of the entire nozzle plate or to the end face of the fuel injector and serves to attach the nozzle plate in a planar manner to the end face of the fuel injector during installation; the other region is a shaped region formed with spray orifices, which is bent out of shape relative to the mounting region and forms a non-zero angle α with the mounting region. The direction of the spray holes can be flexibly adjusted through the angle, so that the spray angle can be flexibly adjusted. In addition, the spray holes can be simply machined and formed through a precise stamping process, and the cost is low. Here, "matching" is to be understood as meaning that a desired nozzle opening orientation can be achieved by adjusting the value of the angle α.

Advantageously, the shaping zone is designed in the form of a cone or chisel edge. Of course, any other suitable shape is also conceivable here, as long as the outer surface of the shaping zone is at an angle α with respect to the plane in which the orifice plate lies, the orientation of the orifice being adjusted by changing this angle.

According to a preferred aspect of the present invention, a penetrating direction of the nozzle hole is perpendicular to a plate plane of the forming area. That is, it is not necessary to punch an oblique hole as in the prior art. This largely avoids the production of blanking burrs at the hole edges.

Preferably, 1 to 6 injection openings are formed in the molding zone. Theoretically, it is also conceivable to provide other numbers of spray openings, by means of which a better atomization can be achieved.

Advantageously, said angle α is between 10 ° and 20 °, preferably 13 °.

Advantageously, the nozzle plate is of circular configuration, wherein the shaping zone and the mounting zone are arranged concentrically, the diameter of the shaping zone is between 2.55mm and 2.65mm, preferably 2.59mm, and the height of the apex of the shaping zone relative to the mounting surface is between 0.4mm and 0.55mm, preferably 0.445mm.

Advantageously, the molding region is connected to the mounting region by a bend which is at an angle β of between 50 ° and 70 °, preferably at an angle β of 60 °, relative to the mounting region.

Advantageously, the valve needle is designed as a ball valve needle, comprising a guide rod and a steel ball, wherein the guide rod is fixedly connected, preferably materially connected, such as welded or integrally formed, with the armature; alternatively, the valve needle is designed as a pintle valve needle, which comprises a guide rod and a pintle, wherein the guide rod is fixedly connected, preferably materially connected, such as welded or integrally formed, to the armature.

Preferably, an inlet screen is provided in the fuel supply passage inside the injector housing. Through setting up the oil feed filter screen, avoided the impurity in the fuel to block up the orifice.

Another aspect of the invention also relates to a fuel engine having a body, a crank mechanism, a valve train and a fuel supply system, wherein the fuel supply system comprises a fuel injector according to one of the preceding embodiments.

Drawings

Further characteristics and advantages of the invention are given by the following description of a preferred embodiment with the aid of the drawings.

The figures show:

FIG. 1 is a cross-sectional view of one embodiment of a fuel injector according to the present disclosure;

FIG. 2 is a cross-sectional view of an embodiment of an orifice plate of a fuel injector according to the present disclosure;

FIG. 3 is a top view of one embodiment of an orifice plate of a fuel injector according to the present invention.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It is obvious that the described embodiments are only a part of the possible embodiments of the invention, but the invention is not limited thereto.

FIG. 1 illustrates a cross-sectional view of a fuel injector, generally indicated at 10. The injector 10 includes an injector housing 1 and an injection nozzle 6. The end face of the fuel injection nozzle 6 is covered with an injection hole plate 8. An electromagnet assembly, a needle valve assembly and a return spring 2 are arranged in the fuel injector shell 1. The needle valve assembly is designed here as a ball valve type, comprising a valve needle and a valve seat, the valve needle in turn comprising a guide rod and a steel ball 5. The solenoid assembly comprises a solenoid coil 3 and an armature 4, the solenoid coil 3 being arranged around the axis of the needle valve assembly. The armature 4 is operatively connected to the valve needle of the needle valve assembly, in particular welded together or integrally formed. In a further embodiment, which is not shown, it is also conceivable to design the needle valve assembly as a pintle, wherein the steel ball 5 is replaced by a pintle.

The fuel injector 10 is installed on a cylinder cover near an intake manifold or an intake passage through a seal ring, an electromagnetic coil is switched on according to a fuel injection pulse signal sent by an ECU, and a needle valve overcomes the elastic force of a return spring 2 to lift up under the action of the magnetic field of the electromagnetic coil, so that fuel is injected to the intake manifold or a main pipe. When the ECU closes the injector, injection is stopped. The fuel oil comes from the high-pressure oil path and flows to the fuel injection nozzle through the fuel supply channel. An oil inlet filter screen 7 can be arranged in the fuel oil supply channel, and impurities in the fuel oil can be prevented from blocking the spray holes and causing failure of the oil sprayer by arranging the oil inlet filter screen.

Fig. 2 shows a possible embodiment of the perforated plate 8 in isolation. As shown in fig. 2, the nozzle plate 8 is designed in a conical shape. Strictly speaking, the forming region 11 of the nozzle plate 8 is designed in a conical manner. However, it is also conceivable to design the shaping region 11 of the orifice plate in another shape, for example in the form of a chisel edge, as long as the shaping region forms an angle α of more than zero degrees with respect to the plane of the orifice plate 8. The value of the angle α is between 10 ° and 20 °, preferably 13 °. In this molding zone 11, a nozzle 12 is formed. Only one nozzle 12 is schematically shown in fig. 2, but it is obvious that a plurality of nozzles 12, e.g. 2-6 or more, may be provided. The injector plate 8 also comprises a mounting region 9, the mounting region 9 being designed as a flat surface and being intended to bear against the end face of the injector 6 during installation. A fold 13 is also provided between the mounting region 9 and the shaping region 11. That is, the bent portion 13 connects the mounting region 9 and the molding region 11 together. The bend 13 is bent over an angle β of between 50 ° and 70 °, preferably 60 °, relative to the mounting region 9. The orifice plate 8 is designed in a circular manner overall, wherein the shaping region 11 and the mounting region 9 are arranged concentrically, the diameter R of the shaping region 11 is between 2.55mm and 2.65mm, preferably 2.59mm, and the height h0.4mm and 0.55mm, preferably 0.445mm, of the apex of the shaping region 11 relative to the mounting surface (the plane of the orifice plate 8 facing away from the shaping region 11) is provided.

Fig. 3 shows a plan view of the nozzle orifice 8 shown in fig. 2. As is clear from fig. 3, the perforated plate 8 comprises a mounting region 9 and a shaping region 11 which are arranged concentrically. In the forming zone 11, a plurality of, in this case 6, spray orifices 12 are provided. The number and arrangement of the injection holes 12 can be designed for specific applications, for example, taking into account the displacement of a fuel engine. The through-flow direction of the spray openings 12 is perpendicular to the sheet plane of the forming zone 11. In the process, a straight hole is simply punched in the unbent formed plate by a precision press working process, and then the punched plate is bent to obtain a desired shape and angle of the forming region 11. This method of machining is inexpensive and does not require the punching of angled holes as in the prior art. This largely avoids the production of blanking burrs at the hole edges.

Although not shown separately, the valve needle can be designed as a ball valve needle, which comprises a guide rod and a steel ball 5, wherein the guide rod is fixedly connected, preferably materially connected, such as by laser welding or integrally formed, with the armature 4; alternatively, the valve needle is designed as a pintle valve needle, which comprises a guide rod and a pintle, wherein the guide rod is fixedly connected, preferably materially connected, such as welded or integrally formed, to the armature.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

In the solution of the invention, the angle α is obtained by structuring the shaped area 11 on the orifice plate 8, and the desired orifice orientation can be obtained by adjusting the value of this angle α, thereby achieving a flexible variation of the injector injection angle, resulting in improved fuel economy and reduced emissions. In the solution of the invention, the injection angle control is stable and the variation is small. In addition, the oil sprayer is simple to machine and form and low in manufacturing cost.

It is to be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the design of the present invention, but the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.

Claims

1. A fuel injector comprising a fuel injector housing, a fuel injector nozzle, in which a needle valve assembly, a magnet assembly and a return spring are arranged, the needle valve assembly comprising a valve needle and a valve seat, the magnet assembly comprising a magnet coil, which is arranged around the axis of the needle valve assembly, and an armature, which is in operative connection with the valve needle of the needle valve assembly, wherein an orifice plate is arranged at the end side of the fuel injector nozzle, characterized in that the orifice plate comprises at least one profiled region, in which at least one orifice is formed, and a flat mounting region, wherein the profiled region forms a non-zero angle α with respect to the mounting region of the orifice plate, the value of the angle α matching the desired orifice orientation.

2. The fuel injector of claim 1 characterized in that said shaped region is tapered or chiseled.

3. The fuel injector as claimed in claim 1 or 2, characterized in that the through direction of the injection orifice is perpendicular to the sheet plane of the molding zone.

4. Injector according to claim 1 or 2, characterized in that 1 to 6 injection openings are formed in the molding zone.

5. A fuel injector as set forth in claim 1 or 2 characterized in that said angle α has a value between 10 ° and 20 °.

6. The fuel injector as set forth in claim 1 or 2, characterized in that the orifice plate is configured in a circular shape, wherein a molding region and a mounting region are concentrically arranged, the molding region has a diameter of between 2.55mm and 2.65mm, and a height of an apex of the molding region with respect to the mounting surface is between 0.4mm and 0.55 mm.

7. A fuel injector as set forth in claim 1 or 2 characterized in that said contoured region is connected to the mounting region by a bend at an angle β of between 50 ° and 70 ° relative to the mounting region.

8. A fuel injector as set forth in claim 1 or 2, characterized in that the valve needle is designed as a ball valve type valve needle, which includes a guide rod and a steel ball, wherein the guide rod is fixedly connected with the armature; or the valve needle is designed into a pintle valve needle and comprises a guide rod and a pintle, wherein the guide rod is fixedly connected with the armature.

9. A fuel injector as claimed in claim 1 or claim 2, characterized by a fuel inlet screen located in the fuel supply passage inside the injector housing.

10. A fuel engine having a body, a crank-link mechanism, a valve train and a fuel supply system, wherein the fuel supply system includes a fuel injector according to any one of claims 1 to 9.