CN112360656B - High-pressure fluid injection device and internal combustion engine - Google Patents
High-pressure fluid injection device and internal combustion engine Download PDFInfo
- Publication number
- CN112360656B CN112360656B CN202011364916.7A CN202011364916A CN112360656B CN 112360656 B CN112360656 B CN 112360656B CN 202011364916 A CN202011364916 A CN 202011364916A CN 112360656 B CN112360656 B CN 112360656B
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- Prior art keywords
- needle valve
- hole
- oil
- nozzle
- pressure fluid
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- 238000002347 injection Methods 0.000 title claims abstract description 34
- 239000007924 injection Substances 0.000 title claims abstract description 34
- 239000012530 fluid Substances 0.000 title claims abstract description 33
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 14
- 239000003921 oil Substances 0.000 claims abstract description 92
- 238000009434 installation Methods 0.000 claims abstract description 21
- 239000000295 fuel oil Substances 0.000 claims abstract description 10
- 239000000446 fuel Substances 0.000 claims description 23
- 238000004891 communication Methods 0.000 claims description 11
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000002828 fuel tank Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/04—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure using fluid, other than fuel, for injection-valve actuation
- F02M47/046—Fluid pressure acting on injection-valve in the period of injection to open it
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1873—Valve seats or member ends having circumferential grooves or ridges, e.g. toroidal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
- F02M61/1886—Details of valve seats not covered by groups F02M61/1866 - F02M61/188
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
- F02M61/20—Closing valves mechanically, e.g. arrangements of springs or weights or permanent magnets; Damping of valve lift
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a high-pressure fluid injection device and an internal combustion engine, which belong to the technical field of internal combustion engines, wherein the high-pressure fluid injection device comprises: the shell is provided with an installation cavity, one end of the shell is provided with a servo oil duct and a fuel oil channel, the other end of the shell is provided with a nozzle, and a needle valve hole communicated with the servo oil duct is also formed in the shell; the valve assembly comprises a needle valve and a middle block arranged in the mounting cavity, an oil containing groove which is communicated with the needle valve hole and the fuel oil channel is formed in the middle block, the needle valve is arranged in the needle valve hole in a sliding mode and penetrates through the oil containing groove, the needle valve can slide relative to the middle block to have a first position and a second position, servo oil provided by the servo oil duct can drive the needle valve to move from the first position to the second position, when the needle valve is positioned at the first position, the needle valve cuts off the oil containing groove and the nozzle, and when the needle valve is separated from the first position, the oil containing groove is communicated with the nozzle; and the reset structure can drive the needle valve to move from the second position to the first position. Compared with the prior art, the structure is compact, the parts are few, and the installation and the disassembly are convenient.
Description
Technical Field
The invention relates to the technical field of internal combustion engines, in particular to a high-pressure fluid injection device and an internal combustion engine.
Background
The fluid injection technology is mainly applied to occasions of high-pressure injection of various liquid fuels, such as an internal combustion engine. The fluid injection device serves as a direct control element for the fuel and is undoubtedly one of the most central components of the internal combustion engine. In an internal combustion engine, the function of the fluid injection device is to provide continuous and stable high-pressure fuel for the operation of the engine, and the performance of the fluid injection device plays a critical role in the performance of the whole engine.
The traditional fluid injection device mostly adopts a piezoelectric brake or an electric control signal to control a mechanical component to carry out quick axial reciprocating motion so as to achieve the aim of boosting injection of fluid, however, the fluid injection device under the cooperation of an electric control element and the mechanical component has a complex structure because of necessary oil electric isolation, and under an electric control system, because of the restriction of a boosting piston, the fuel boosting is relatively fixed, and flexible control of the injection pressure and the injection rate under different working conditions is difficult to ensure. In order to solve the problems, the servo oil is adopted to drive mechanical parts to realize the injection of fluid, but the existing fluid injection device adopting the servo oil has the defects of complex structure, more parts and inconvenient installation and disassembly.
Disclosure of Invention
The invention aims to provide a high-pressure fluid injection device and an internal combustion engine, which are used for solving the problems of complex structure, more parts and inconvenient installation and disassembly of the fluid injection device adopting servo oil in the prior art.
The technical scheme adopted by the invention is as follows:
a high pressure fluid ejection device comprising:
A shell provided with an installation cavity, wherein one end of the shell is provided with a servo oil duct and a fuel oil channel, the other end of the servo oil duct is provided with a nozzle, and a needle valve hole communicated with the servo oil duct is also arranged in the shell;
the valve assembly comprises a middle block and a needle valve, the middle block is arranged in the installation cavity, an oil containing groove which is communicated with the needle valve hole and the fuel oil channel is formed in the middle block, the needle valve is arranged in the needle valve hole in a sliding mode and penetrates through the oil containing groove, the needle valve can slide relative to the middle block and has a first position and a second position, the needle valve can be driven to move from the first position to the second position by servo oil provided by a servo oil duct, when the needle valve is located at the first position, the needle valve cuts off the oil containing groove and the nozzle, and when the needle valve is separated from the first position, the oil containing groove is communicated with the nozzle;
and the reset structure can drive the needle valve to move from the second position to the first position.
Further, the reset structure comprises an elastic piece and a limiting piece, wherein the limiting piece is arranged on the needle valve, and the elastic piece is sleeved on the needle valve and is abutted to the limiting piece and the middle block.
Further, the needle valve hole comprises a first hole and a second hole which are communicated, the first hole is communicated with the servo oil duct, and the reset structure is located in the second hole.
Further, a penetrating hole for communicating the oil containing groove with the nozzle is further formed in the middle block, the first end of the needle valve penetrates through the penetrating hole, and when the needle valve is located at the first position, the outer peripheral surface of the first end of the needle valve is in sealing contact with the inner wall surface of the penetrating hole.
Further, the penetrating hole comprises a third hole and a fourth hole, the third hole is communicated with the oil containing groove, the fourth hole is a conical hole, and the small diameter end of the conical hole is connected with the third hole; the needle valve comprises a first portion and a second portion, wherein the first portion penetrates through the third hole, a gap is formed between the first portion and the inner wall of the third hole, the second portion is of a conical structure, and the outer wall surface of the conical structure can be in sealing fit with the inner wall surface of the conical hole.
Further, the casing includes the ware body with tight cap, the ware body with tight cap connects and is formed with the installation cavity, set up in the ware body fuel passage servo oil duct with needle valve hole, nozzle one end is located the installation cavity, the other end wears out tight cap.
Further, the intermediate block is sandwiched between the body and the nozzle.
Further, an annular limiting cavity is formed in the inner wall of the tightening cap, an annular protrusion is arranged on the outer peripheral wall of the device body in a protruding mode, the annular protrusion is located in the annular limiting cavity, and in the axial direction of the needle valve hole, two end faces of the annular protrusion are respectively abutted to two inner wall faces of the annular limiting cavity.
Further, a communication oil duct is formed in the middle block, and the communication oil duct is communicated with the oil containing groove and the fuel oil channel.
In order to achieve the above object, the present invention also provides an internal combustion engine including the high-pressure fluid injection device in any one of the above aspects.
The beneficial effects of the invention are as follows:
The invention provides a high-pressure fluid injection device and an internal combustion engine. Wherein, the casing has the installation cavity, and casing one end is provided with servo oil duct and fuel channel, and the other end is provided with the nozzle, still is provided with the needle valve hole with servo oil duct intercommunication in the casing. The valve assembly comprises a middle block and a needle valve, the middle block is arranged in the mounting cavity, an oil containing groove which is communicated with the needle valve hole and the fuel oil channel is formed in the middle block, the needle valve is arranged in the needle valve hole in a sliding mode and penetrates through the oil containing groove, the needle valve can slide relative to the middle block and has a first position and a second position, the servo oil duct provides servo oil to drive the needle valve to move from the first position to the second position, when the needle valve is located at the first position, the needle valve cuts off the oil containing groove and the nozzle, and when the needle valve is separated from the first position, the oil containing groove is communicated with the nozzle. The reset structure can drive the needle valve to move from the second position to the first position. Compared with the prior art, the structure is compact, the parts are few, and the installation and the disassembly are convenient.
Drawings
FIG. 1 is a schematic cross-sectional view of a high pressure fluid injection apparatus (needle valve in a first position) provided by the present invention;
FIG. 2 is a schematic cross-sectional view of a body provided by the present invention;
FIG. 3 is a schematic cross-sectional view of a tightening cap provided by the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 1 at A;
FIG. 5 is a schematic cross-sectional view of an intermediate block provided by the present invention;
fig. 6 is a schematic partial cross-sectional view of a needle valve provided by the present invention.
In the figure:
1. a housing; 11. a body; 111. a servo oil passage; 112. a fuel passage; 113. a needle valve orifice; 1131. a first hole; 1132. a second hole; 114. an annular protrusion; 12. tightening the cap; 121. an annular limiting cavity;
2. A nozzle;
3. A needle valve; 31. a first section; 32. a second section; 33. a third section;
4. A middle block; 41. an oil tank; 42. penetrating holes; 421. a third hole; 422. a fourth hole; 43. a communication oil duct;
5. a reset structure; 51. a limiting piece; 52. an elastic member;
10. A mounting cavity.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present invention are shown.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
As shown in fig. 1 to 6, the present embodiment provides a high-pressure fluid ejection device including a housing 1, a valve assembly, and a reset structure 5. Wherein, the casing 1 has the installation cavity 10, and casing 1 one end is provided with servo oil duct 111 and fuel passageway 112, and the other end is provided with nozzle 2, still is provided with the needle valve hole 113 with servo oil duct 111 intercommunication in the casing 1. The valve assembly comprises a middle block 4 and a needle valve 3, wherein the middle block 4 is arranged in the installation cavity 10, an oil containing groove 41 which is communicated with the needle valve hole 113 and the fuel channel 112 is formed in the middle block 4, the needle valve 3 is arranged in the needle valve hole 113 in a sliding mode and penetrates through the oil containing groove 41, the needle valve 3 can slide relative to the middle block 4 to form a first position and a second position, when the needle valve 3 is positioned at the first position, the needle valve 3 cuts off the oil containing groove 41 from the nozzle 2, and when the needle valve 3 is separated from the first position, the oil containing groove 41 is communicated with the nozzle 2. The reset structure 5 can drive the needle valve to move from the second position to the first position.
It will be appreciated that when the needle valve 3 is in the first position, the needle valve 3 blocks the oil reservoir 41 from the nozzle 2, and fuel in the fuel passage 112 enters the oil reservoir 41; when the servo oil in the servo oil passage 111 pushes the needle valve 3 to move from the first position to the second position, the oil accommodating groove 41 is communicated with the nozzle 2, and at this time, the fuel in the oil accommodating groove 41 can enter the nozzle 2 and be sprayed out through the nozzle 2, so that the fuel injection is realized. Compared with the prior art, the high-pressure type injection device has the advantages of compact structure, fewer parts and convenience in installation and disassembly.
As shown in fig. 1 to 3, the housing 1 includes a body 11 and a cap 12, the body 11 and the cap 12 are connected and formed with the installation cavity 10, the body 11 is provided therein with the fuel passage 111, the servo oil passage 112 and the needle valve hole 113, one end of the nozzle 2 is located in the installation cavity 10, and the other end penetrates out of the cap 12.
Further, in the present embodiment, the body 11 presses the intermediate block 4 against the nozzle 2. By doing so, the installation of the intermediate block 4 can be stabilized. Of course, in other embodiments, a limiting step may be disposed inside the tightening cap 12, and the device 11 may press the intermediate block 4 against the limiting step and the nozzle 2.
Further, as shown in fig. 2 and 3, an annular limiting cavity 121 is formed on the inner side of the tightening cap 12, an annular protrusion 114 is provided on the outer peripheral wall of the device body 11 in a protruding manner, the annular protrusion 114 is located in the annular limiting cavity 121, and two end faces of the annular protrusion 114 are respectively abutted to two end faces of the annular limiting cavity 121 in the axial direction of the needle valve hole 113. By arranging the annular limiting cavity 121 and the annular protrusion 114, the tight cap 12 and the device body 11 can be ensured to be installed in place, and the installation stability of the tight cap 12 and the device body 11 is improved. Of course, in other embodiments, the tightening cap 12 and the body 11 may be screwed together.
As shown in fig. 1, 2 and 4, the reset structure 5 includes an elastic member 52 and a limiting member 51, the limiting member 51 is disposed on the needle valve 3, and the elastic member 52 is sleeved on the needle valve 3 and abuts against the limiting member 51 and the intermediate block 4. Specifically, the needle valve hole 113 includes a first hole 1131 and a second hole 1132 that are communicated, the first hole 1131 is communicated with the servo oil passage 111, and the reset structure 5 is located in the second hole 1132. In this embodiment, the elastic member 52 is preferably a spring.
As shown in fig. 4 to 6, a through hole 42 for communicating the oil tank 41 and the nozzle 2 is further formed in the intermediate block 4, one end of the needle valve 3 is disposed through the through hole 42, and when the needle valve 3 is located at the first position, the outer peripheral surface of the first end of the needle valve 3 is in sealing contact with the inner wall surface of the through hole 42. Specifically, in the present embodiment, the through hole 42 includes a third hole 421 and a fourth hole 422, the third hole 421 is communicated with the oil containing groove 41, the fourth hole 422 is a tapered hole, and a small diameter end of the tapered hole is connected to the third hole 421. The needle valve 3 includes a first portion 31 and a second portion 32, where the first portion 31 is disposed through the third hole 421, and a gap is formed between the first portion 31 and an inner wall of the third hole 421, the second portion 32 is in a tapered structure, and an outer wall surface of the tapered structure can be bonded with an inner wall surface of the tapered hole in a sealing manner, and it can be understood that the second portion 32 is located at a first end of the needle valve 3. Preferably, in the present embodiment, the diameter of the first portion 31 is smaller than the inner diameter of the third hole 421, and in other embodiments, the first portion 31 may be provided with an oil groove along the axial direction thereof.
It will be appreciated that when the needle valve 3 is in the first position, the outer wall surface of the tapered structure of the second portion 32 sealingly engages the inner wall surface of the fourth bore 422, and the oil reservoir 41 is disconnected from the nozzle 2. When the needle valve 3 moves from the first position to the second position, the outer wall surface of the second portion 32 is out of contact with the inner wall surface of the fourth hole 422, and at this time, the fuel in the fuel tank 41 can flow out through the gap between the first portion 31 and the inner wall of the third hole 421 and the gap between the second portion 32 and the inner wall surface of the fourth hole 422, so that communication between the fuel tank 41 and the nozzle 2 is achieved, and fuel injection is achieved.
Further, a communication oil duct 43 is further formed in the middle block 4, and the communication oil duct 43 is communicated with the oil containing groove 41 and the fuel oil channel 112.
Further, the needle valve 3 further includes a third portion 33, the first portion 31 is connected between the second portion 32 and the third portion 33, and the stopper 51 is disposed on the third portion 33. Preferably, in the present embodiment, the first portion 31, the second portion 32, and the third portion 33 constituting the needle valve 3 are integrally formed, but of course, in other embodiments, the first portion 31, the second portion 32, and the third portion 33 may be provided separately.
The operation of the high-pressure fluid ejection device will be described in detail below.
1. When the needle valve 3 is positioned at the first position under the action of the elastic piece 52, the outer wall surface of the conical structure of the needle valve 3 is in sealing fit with the inner wall surface of the conical hole, the oil containing groove 41 is disconnected from the nozzle 2, and fuel enters the oil containing groove 41 through the fuel passage 112 and the communicating oil passage 43.
2. When the servo oil passage 111 is filled with the servo oil, the servo oil overcomes the acting force of the elastic member 52 and drives the needle valve 3 to move from the first position to the second position, so that the outer wall surface of the conical structure of the needle valve 3 is separated from the inner wall surface of the conical hole, and thus the fuel in the fuel tank 41 can flow out through the gap between the first portion 31 and the inner wall surface of the third hole 421 and the gap between the conical structure and the inner wall surface of the conical hole, and the communication between the fuel tank 41 and the nozzle 2 is realized, and the injection of the fuel is realized. In the process of moving the needle valve 3 from the first position to the second position, the elastic member 52 is compressed, so that after the acting force of the servo oil is removed, the elastic member 52 returns to the original state and drives the needle valve 3 to return to the first position from the second position, that is, the outer wall surface of the conical structure of the needle valve 3 is in sealing fit with the inner wall surface of the conical hole, and the communication between the oil containing groove 41 and the nozzle 2 is disconnected.
In summary, the high-pressure fluid injection apparatus provided in this embodiment includes a housing 1, a valve assembly and a reset structure 5. Wherein, the casing 1 has the installation cavity 10, and casing 1 one end is provided with servo oil duct 111 and fuel passageway 112, and the other end is provided with nozzle 2, still is provided with the needle valve hole 113 with servo oil duct 111 intercommunication in the casing 1. The valve assembly comprises a middle block 4 and a needle valve 3, wherein the middle block 4 is arranged in the installation cavity 10, an oil containing groove 41 which is communicated with a needle valve hole 113 and a fuel oil channel 112 is formed in the middle block 4, the needle valve 3 is arranged in the needle valve hole 113 in a sliding mode and penetrates through the oil containing groove 41, the needle valve 3 can slide relative to the middle block 4 to form a first position and a second position, servo oil provided by a servo oil duct can drive the needle valve 3 to move from the first position to the second position, when the needle valve 3 is located at the first position, the needle valve 3 cuts off the oil containing groove 41 from the nozzle 2, and when the needle valve 3 is separated from the first position, the oil containing groove 41 is communicated with the nozzle 2. The reset structure 5 can drive the needle valve 3 to move from the second position to the first position. Compared with the prior art, the structure is compact, the parts are few, and the installation and the disassembly are convenient. And can reduce servo oil pressure and the diameter of needle valve 3 greatly, can adopt the spring of smaller volume simultaneously, further reduced the complexity of this high pressure type fluid injection device.
The embodiment also provides an internal combustion engine comprising the high-pressure fluid injection device.
The above embodiments merely illustrate the basic principle and features of the present invention, and the present invention is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. A high pressure fluid ejection device, comprising:
The device comprises a shell (1) and a valve seat, wherein the shell is provided with an installation cavity (10), one end of the shell (1) is provided with a servo oil duct (111) and a fuel oil channel (112), the other end of the shell is provided with a nozzle (2), and a needle valve hole (113) communicated with the servo oil duct (111) is also arranged in the shell (1);
The valve assembly comprises a middle block (4) and a needle valve (3), wherein the middle block (4) is arranged in the mounting cavity (10), an oil containing groove (41) which is communicated with the needle valve hole (113) and the fuel oil channel (112) is formed in the middle block (4), the needle valve (3) is arranged in the needle valve hole (113) in a sliding mode and penetrates through the oil containing groove (41), the needle valve (3) can slide relative to the middle block (4) and has a first position and a second position, servo oil provided by a servo oil duct (111) can drive the needle valve (3) to move from the first position to the second position, when the needle valve (3) is located at the first position, the needle valve (3) cuts off the oil containing groove (41) from the nozzle (2), and when the needle valve (3) is separated from the first position, the oil containing groove (41) is communicated with the nozzle (2);
a reset structure (5), the reset structure (5) can drive the needle valve (3) to move from the second position to the first position; the reset structure (5) comprises an elastic piece (52) and a limiting piece (51), the limiting piece (51) is arranged on the needle valve (3), the elastic piece (52) is sleeved on the needle valve (3) and is abutted to the limiting piece (51) and the middle block (4);
the middle block (4) is internally provided with a penetrating hole (42) communicated with the oil containing groove (41) and the nozzle (2), the first end of the needle valve (3) penetrates through the penetrating hole (42), and when the needle valve (3) is located at the first position, the outer peripheral surface of the first end of the needle valve (3) is in sealing abutting contact with the inner wall surface of the penetrating hole (42).
2. The high pressure fluid injection apparatus of claim 1 wherein the needle valve bore (113) comprises a first bore (1131) and a second bore (1132) in communication, the first bore (1131) communicating with the servo oil gallery (111), the reset structure (5) being located within the second bore (1132).
3. The high-pressure fluid ejection device according to claim 1, wherein the penetrating hole (42) includes a third hole (421) and a fourth hole (422), the third hole (421) is communicated with the oil tank (41), the fourth hole (422) is a tapered hole, and a small diameter end of the tapered hole is connected to the third hole (421); the needle valve (3) comprises a first portion (31) and a second portion (32), the first portion (31) penetrates through the third hole (421), a gap is formed between the first portion and the inner wall of the third hole (421), the second portion (32) is of a conical structure, and the outer wall surface of the conical structure can be in sealing fit with the inner wall surface of the conical hole.
4. The high-pressure fluid injection device according to claim 1, wherein the housing (1) comprises a device body (11) and a tightening cap (12), the device body (11) and the tightening cap (12) are connected and are formed with the mounting cavity (10), the fuel channel (112), the servo oil duct (111) and the needle valve hole (113) are formed in the device body (11), one end of the nozzle (2) is located in the mounting cavity (10), and the other end of the nozzle penetrates out of the tightening cap (12).
5. The high-pressure fluid ejection device according to claim 4, characterized in that the intermediate block (4) is interposed between the body (11) and the nozzle (2).
6. The high-pressure fluid injection device according to claim 4, wherein an annular limiting cavity (121) is formed in the inner wall of the tightening cap (12), an annular protrusion (114) is protruding from the outer peripheral wall of the device body (11), the annular protrusion (114) is located in the annular limiting cavity (121), and two end faces of the annular protrusion (114) are respectively abutted to two inner wall faces of the annular limiting cavity (121) in the axial direction of the needle valve hole (113).
7. The high-pressure fluid injection device according to claim 1, wherein a communication oil passage (43) is provided in the intermediate block (4), and the communication oil passage (43) communicates with the oil tank (41) and the fuel passage (112).
8. An internal combustion engine comprising a high pressure fluid injection device according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364916.7A CN112360656B (en) | 2020-11-27 | 2020-11-27 | High-pressure fluid injection device and internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011364916.7A CN112360656B (en) | 2020-11-27 | 2020-11-27 | High-pressure fluid injection device and internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112360656A CN112360656A (en) | 2021-02-12 |
| CN112360656B true CN112360656B (en) | 2024-08-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011364916.7A Active CN112360656B (en) | 2020-11-27 | 2020-11-27 | High-pressure fluid injection device and internal combustion engine |
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| CN (1) | CN112360656B (en) |
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| CN113374607A (en) * | 2021-06-03 | 2021-09-10 | 上海交通大学 | Swirl oil sprayer suitable for high injection pressure |
| CN115234119A (en) * | 2021-07-16 | 2022-10-25 | 福建西河卫浴科技有限公司 | Damping mechanism and door |
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| CN105134439B (en) * | 2015-08-14 | 2017-07-14 | 江苏科技大学 | A kind of marine diesel engine fuel injector |
| CN109488501B (en) * | 2018-12-27 | 2024-03-08 | 重庆红江机械有限责任公司 | Servo oil driven common rail oil sprayer for heavy oil |
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| CN111894775A (en) * | 2020-08-26 | 2020-11-06 | 中船动力研究院有限公司 | Supercharged fluid injection device and internal combustion engine |
| CN213598104U (en) * | 2020-11-27 | 2021-07-02 | 中船动力研究院有限公司 | High-pressure fluid injection device and internal combustion engine |
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