CN112943495B

CN112943495B - Direct injection electromagnetic valve type injector in cylinder

Info

Publication number: CN112943495B
Application number: CN202110175849.2A
Authority: CN
Inventors: 莫韬; 潘俊运; 梁国元; 何汉滔; 李梁
Original assignee: Liuzhou Yuanchuang Efi Technology Co ltd
Current assignee: Liuzhou Yuanchuang Efi Technology Co ltd
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2022-05-03
Anticipated expiration: 2041-02-09
Also published as: CN112943495A

Abstract

A direct injection electromagnetic valve type ejector in a cylinder relates to an ejector, and comprises a shell, a main shaft, a magnetic sleeve, a valve core, a steel ball and a valve seat, wherein the valve seat is provided with an injection hole and a valve cavity, and the injection hole is an I-shaped injection hole formed by connecting large round holes at two ends and a small round hole in the middle; the front end of the valve cavity is a conical valve hole, the rear end of the valve cavity is a round limiting hole, the conical valve hole is communicated with the I-shaped injection hole, the round limiting hole is in sealing fit with the steel ball, a flow stabilizing hole III is arranged on the side wall of the round limiting hole, and the flow stabilizing hole III is communicated with the round limiting hole. The buffer spring is sleeved on the side wall of the buffer spring and is provided with a flow stabilizing hole II; the valve core is provided with a flow stabilizing hole I along the axial direction. The valve seat jet hole is an I-shaped jet hole, so that the proportion of the jet aperture and the jet depth can be effectively reduced, the sprayed atomized particles are smaller, the combustion of an engine is facilitated, the oil consumption of the engine is reduced, the performance of a product is stable and reliable, and the valve seat jet hole has the characteristics of strong universality, high product quality, good sealing property, reasonable and reliable structure and the like, and is easy to popularize and use.

Description

Direct injection electromagnetic valve type injector

Technical Field

The invention relates to an injector, in particular to an in-cylinder direct injection solenoid valve type injector.

Background

The existing direct injection solenoid valve type injector in the cylinder has the advantages that because the fuel pressure is high (11 MPa-35 MPa), in order to prevent the valve seat from being deformed by pressure, the valve seat sealing structure is of a multi-purpose thick-wall structure, most of injection hole structures are in a straight hole or step hole form, the proportion of the injection hole diameter to the hole depth is too large, the average particle diameter of injected fuel atomized particles is large, the injected fuel atomized particles are mixed with air and sucked into an engine to operate, and the oil consumption of the engine is large. In addition, the injection medium flows into the valve cavity through the fit clearance between the valve seat and the steel ball, and the passage is generally realized through the steel ball grinding flat position, or the steel ball is not ground but is realized through the fit clearance between the large valve seat and the steel ball, but the steel ball grinding flat position is difficult to process, and the seal performance of the injector is poor due to the fact that the steel ball is not ground and the fit clearance between the valve seat and the steel ball is enlarged.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the direct injection electromagnetic valve type injector in the cylinder is provided, so that the average particle size of fuel atomized particles is reduced on the premise of stable and reliable product performance, and the oil consumption of an engine is reduced.

The technical scheme for solving the technical problems is as follows: the utility model provides an in-cylinder direct injection solenoid valve formula sprayer, includes shell, main shaft, flux sleeve, case, steel ball, disk seat, the disk seat have with steel ball complex valve pocket and be located the jet orifice of disk seat front end, the front end of case is connected with the buffering spring housing, the jet orifice be the I shape jet orifice that is formed by connecting the big round hole in both ends and middle little round hole.

The invention further adopts the technical scheme that: the front end of the valve cavity is a conical valve hole, and the rear end of the valve cavity is a round limiting hole; the conical valve hole is communicated with the I-shaped jet hole, the round limiting hole is in sealing fit with the steel ball, an inclined flow stabilizing hole III is arranged on the side wall of the round limiting hole, and the flow stabilizing hole III is communicated with the round limiting hole; the part of the steel ball matched with the valve cavity is of a complete spherical structure.

The further technical scheme of the invention is as follows: the buffer spring sleeve is provided with a flow stabilizing hole II on the side wall.

The further technical scheme of the invention is as follows: the valve core is provided with a flow stabilizing hole I along the axial direction.

Due to the adoption of the structure, compared with the prior art, the direct injection electromagnetic valve type injector in the cylinder has the following beneficial effects:

1. the product performance is stable and reliable

The valve seat jet hole is an I-shaped jet hole formed by connecting the large round holes at the two ends and the small round hole in the middle, so that the proportion of the jet aperture and the hole depth can be effectively reduced, the jet medium forms turbulent flow when flowing into the I-shaped jet hole, atomized particles jetted by the jet medium through the jet hole are smaller, the combustion of an engine is facilitated, the tail gas emission index is reduced, the environment-friendly requirement is facilitated, the other performances of a product are not influenced, and the product performance is stable and reliable.

2. Reducing the oil consumption of the engine

The invention has the advantages that the injection hole of the valve seat is the I-shaped injection hole formed by connecting the large round holes at the two ends and the small round hole in the middle, so that the proportion of the injection aperture and the hole depth can be reduced, the injection medium forms turbulent flow when flowing into the I-shaped injection hole, the average particle size of the injected fuel atomized particles is smaller, and the oil consumption of an engine can be reduced.

3. High versatility

The I-shaped injection hole is designed on the valve seat, so that the valve is suitable for products with different flow sections and different injection angle requirements, and has stronger universality.

4. High product quality

The front end of the valve cavity of the valve seat is a conical valve hole, and the rear end of the valve cavity of the valve seat is a round limiting hole; the conical valve hole is communicated with the I-shaped jet hole, the circular limiting hole is in sealing fit with the steel ball, an inclined flow stabilizing hole III is arranged on the side wall of the circular limiting hole, and the flow stabilizing hole III is communicated with the circular limiting hole. In the using process, the jet medium passes through the flow stabilizing hole III of the valve seat and then is jetted to the engine through the I-shaped jet hole, and the flow stabilizing hole III of the valve seat is designed into a third flow stabilizing system of the injector flow channel system, namely a three-stage flow stabilizing system. And the ejector with the three-stage flow stabilizing system has more stable ejection medium flowing in the inner cavity flow channel, so that the connection and coaxiality between the parts of the whole ejector are better, the movement of the parts is more stable, and the quality of the whole ejector is more reliable.

5. Good sealing performance

The front end of the valve cavity of the valve seat is a conical valve hole, and the rear end of the valve cavity of the valve seat is a round limiting hole; the circular limiting hole is in sealing fit with the steel ball with a complete spherical structure, the fit is a small-gap tight fit, the quality of coaxiality fit of the steel ball and the conical valve hole of the valve seat is greatly improved, and therefore the sealing performance of the ejector is improved.

6. Reasonable and reliable structure

The front end of the valve cavity of the valve seat is a conical valve hole, and the rear end of the valve cavity of the valve seat is a round limiting hole; an inclined flow stabilizing hole III is formed in the side wall of the circular limiting hole and communicated with the circular limiting hole; the flow stabilizing hole III can realize side oil feeding, so that the steel balls do not need to be ground to a flat position, one machining process is reduced, the risks of sharp edges and foreign matters caused by the steel balls after being ground are avoided, the influence on product performance caused by the fact that large and small surfaces are easily formed after the small steel balls are ground is also avoided, the flat position is not easily ground due to the fact that the steel balls are too small, and the flow stabilizing hole III is reasonable and reliable in structure.

The technical features of the direct injection solenoid valve injector according to the present invention will be further described with reference to the accompanying drawings and embodiments.

Drawings

FIG. 1: the structure of the direct injection solenoid valve injector of the present invention is schematically illustrated,

FIG. 2: an enlarged view of a portion a of figure 1,

FIG. 3: an enlarged view of the portion B of figure 1,

in the above drawings, the respective reference numerals are explained as follows:

1-shell, 2-filter screen, 3-main shaft, 4-return spring, 401-installation stop block,

5-a magnetic conductive sleeve, 6-a coil,

7-valve core, 701-steady flow hole I, 8-valve core connecting rod,

9-a buffer spring sleeve, 901-a steady flow hole II,

10-a buffer spring, 1001-a buffer spring seat, 11-a steel ball,

12-valve seat, 1201-valve cavity, 1202-flow stabilizing hole III and 1203-I-shaped injection hole;

q-anterior direction, H-posterior direction.

Detailed Description

Example one

Shown in fig. 1 is a direct injection solenoid valve formula sprayer in jar, including shell 1, filter screen 2, main shaft 3, return spring 4, magnetic conductive sleeve 5, coil 6, case 7, case connecting rod 8, buffer spring cover 9, buffer spring 10, steel ball 11, disk seat 12, wherein:

filter screen 2 and main shaft 3 install in shell 1 in proper order, in return spring 4 installation main shaft 3, magnetic sleeve 5 installs outside shell 1, coil 6 installs on the coil former that is located between magnetic sleeve 5 and shell 1. The middle part of the valve core 7 is connected to the valve core connecting rod 8, and the valve core 7 is provided with a flow stabilizing hole I701 (see figure 2) along the axial direction at the periphery of the valve core connecting rod 8; the rear end of the valve core connecting rod 8 is connected with an installation stop block 401 of the return spring 4; the front end part of the valve core connecting rod 8 is connected with the steel ball 11.

The valve seat 12 is provided with a valve cavity 1201 matched with the steel ball 11 and an injection hole positioned at the front end of the valve seat 12, and the injection hole is an I-shaped injection hole 1203 formed by connecting large round holes at two ends and a small round hole in the middle; the front end of the valve cavity 1201 is a conical valve hole, and the rear end of the valve cavity is a round limiting hole; the conical valve hole is communicated with the I-shaped injection hole 1203, the circular limiting hole is in sealing fit with the steel ball 11, an inclined flow stabilizing hole III 1202 is formed in the side wall of the circular limiting hole, and the flow stabilizing hole III 1202 is communicated with the circular limiting hole; the part of the steel ball matched with the valve cavity is of a complete spherical structure (see figure 3).

The front end of the valve core 7 is connected with the buffer spring sleeve 9, the buffer spring sleeve 9 is provided with a flow stabilizing hole II 901 on the side wall thereof, the buffer spring 10 is positioned in the buffer spring sleeve 9, one end of the buffer spring 10 is sleeved on the buffer spring seat 1001 connected to the front end of the valve core 7, and the other end of the buffer spring 10 abuts against the bottom end of the buffer spring sleeve 9.

The working principle of the invention is as follows:

when a driving signal is received, a circuit of a coil 6 is connected to generate magnetism, a magnetic field of the coil 6 penetrates through a main shaft 3, a magnetic conductive sleeve 5 and a valve core 7, the main shaft 3, the magnetic conductive sleeve 5 and the valve core 7 are made to conduct magnetism, the coil 6, the main shaft 3, the magnetic conductive sleeve 5 and the valve core 7 form an injector magnetic field system, at the moment, the valve core 7 touches the end face of an installation stop block 401 and then touches the end face of the main shaft 3 (a stable flow hole II 901 is in a long-open state), and meanwhile, the main shaft 3 sucks the valve core 7 and two touch and open a sealing face system formed by a steel ball 11 and a conical valve hole of a valve seat 12. Meanwhile, the injection medium enters the inner cavity of the injector through the filter screen 2, flows through the flow channel of the main shaft 3, flows into the flow stabilizing hole I701 of the valve core 7 of the primary flow stabilizing system, flows through the flow stabilizing hole II 901 of the buffering spring sleeve 9 of the secondary flow stabilizing system, and finally flows through the flow stabilizing hole III 1202 of the valve seat 12 of the tertiary flow stabilizing system and then is injected into the engine through the I-shaped injection hole. The filter screen 2 plays a role in filtering large particles in the spraying medium, the valve core 7 plays a role in opening and closing a cavity channel of the injector and a role in stably spraying the medium, the buffer spring sleeve 9 plays a role in stably spraying the medium, and the valve seat 12 plays a role in opening and closing the cavity channel of the injector and a role in spraying atomized particles by the injector.

Claims

1. The utility model provides an in-cylinder direct injection solenoid valve formula sprayer, includes shell (1), main shaft (3), magnetic conductive sleeve (5), case (7), steel ball (11), disk seat (12) have with steel ball (11) complex valve pocket (1201) and the jet orifice that is located disk seat (12) front end, the front end of case (7) is connected with buffer spring cover (9), its characterized in that: the jet hole is an I-shaped jet hole (1203) formed by connecting large round holes at two ends and a small round hole in the middle; the front end of the valve cavity (1201) is a conical valve hole, and the rear end of the valve cavity is a round limiting hole; the conical valve hole is communicated with the I-shaped injection hole (1203), the round limiting hole is in sealing fit with the steel ball (11), an inclined flow stabilizing hole III (1202) is arranged on the side wall of the round limiting hole, and the flow stabilizing hole III (1202) is communicated with the round limiting hole; the part of the steel ball matched with the valve cavity is of a complete spherical structure.

2. The in-cylinder direct injection solenoid valve injector of claim 1, wherein: the buffer spring sleeve (9) is provided with a flow stabilizing hole II (901) on the side wall.

3. The in-cylinder direct injection solenoid valve injector of claim 2, wherein: the valve core (7) is provided with a flow stabilizing hole I (701) along the axial direction.