CN111535957B - Integrated dual-fuel injector and injection method thereof - Google Patents
Integrated dual-fuel injector and injection method thereof Download PDFInfo
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- CN111535957B CN111535957B CN202010478495.4A CN202010478495A CN111535957B CN 111535957 B CN111535957 B CN 111535957B CN 202010478495 A CN202010478495 A CN 202010478495A CN 111535957 B CN111535957 B CN 111535957B
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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
- F02M43/00—Fuel-injection apparatus operating simultaneously on two or more fuels, or on a liquid fuel and another liquid, e.g. the other liquid being an anti-knock additive
- F02M43/04—Injectors peculiar thereto
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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
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to the technical field of dual-fuel injectors, and discloses an integrated dual-fuel injector and an injection method thereof. Wherein the integrated dual fuel injector comprises: the valve body is provided with an oil cavity, an oil injection hole, an oil injection oil passage, an air inlet channel, an oil control inlet channel and an oil control return channel; the valve rod is arranged in the oil cavity; the nozzle sleeve is provided with an air injection hole, the nozzle sleeve and the valve body define a pressure regulating cavity, and the pressure regulating cavity is respectively communicated with the oil control inlet channel, the oil control oil return channel and the air injection hole; the pressure regulating assembly is arranged in the pressure regulating cavity, the gas jetting hole is isolated from the gas inlet channel when the pressure regulating assembly is abutted against the end part of the nozzle sleeve, and the pressure regulating assembly can move relative to the nozzle sleeve when gas is introduced into the gas inlet channel so as to communicate the gas inlet channel with the gas jetting hole; and the oil control valve is arranged on the oil control oil return passage. The integrated dual-fuel injector disclosed by the invention not only can realize three working modes, but also has the advantages of simple structure, low cost, better injection effect and no need of changing an engine.
Description
Technical Field
The invention relates to the technical field of dual-fuel injectors, in particular to an integrated dual-fuel injector and an injection method thereof.
Background
The existing fuel injector is generally used for an engine with lower fuel supply pressure, and mainly only can inject one fuel, namely only one working mode can be met.
Disclosure of Invention
Based on the above, an object of the present invention is to provide an integrated dual fuel injector, which not only can inject two kinds of fuel, but also has the advantages of simple structure, low cost, good injection effect and no need of changing the engine.
The invention further aims to provide an injection method of the integrated dual-fuel injector, which is simple to operate, has a good injection effect and can realize injection of two kinds of fuel.
In order to achieve the purpose, the invention adopts the following technical scheme:
an integrated dual fuel injector comprising: the valve body is provided with an oil cavity, an oil injection hole, an oil injection oil duct, an air inlet channel, an oil control inlet channel and an oil control return channel, and the oil injection oil duct and the oil injection hole are respectively communicated with the oil cavity; the valve rod is arranged in the oil cavity, the oil injection hole is isolated from the oil injection oil duct when the valve rod is abutted to the valve body, and the oil injection hole is communicated with the oil injection oil duct when the valve rod is separated from the valve body; the nozzle sleeve is provided with an air injection hole, the nozzle sleeve and the valve body define a pressure regulating cavity, one end of the pressure regulating cavity is respectively communicated with the oil control inlet channel and the oil control return channel, and the other end of the pressure regulating cavity is communicated with the air injection hole; the pressure regulating assembly is arranged in the pressure regulating cavity, the pressure regulating assembly is respectively assembled with the valve body and the nozzle sleeve in a clearance mode, the gas jetting hole is isolated from the gas inlet channel when the pressure regulating assembly is abutted against the end portion of the nozzle sleeve, and the pressure regulating assembly can move relative to the nozzle sleeve when gas is introduced into the gas inlet channel so that the gas inlet channel is communicated with the gas jetting hole; and the oil control valve is arranged on the oil control oil return passage.
As a preferable solution of the integrated dual fuel injector, the integrated dual fuel injector further includes an oil injection valve connected to the valve rod, and the oil injection valve is configured to control movement of the valve rod.
As an integrated form dual fuel injector's preferred scheme, the pressure regulating subassembly includes elastic component and nozzle coupling cover, the one end butt of elastic component in the valve body, the other end butt of elastic component in the one end of nozzle coupling cover, the other end of nozzle coupling cover can the butt in the nozzle cover, the nozzle coupling cover respectively with the valve body with nozzle cover clearance fit, the nozzle coupling cover with during nozzle cover butt the fumarole with inlet channel is isolated.
As a preferable scheme of the integrated dual-fuel injector, an end face of the nozzle coupling sleeve abutted against the elastic member is a first circular ring, an end face of the nozzle coupling sleeve capable of abutting against the valve body is a second circular ring, and an area of the first circular ring is larger than an area of the second circular ring.
As a preferable scheme of the integrated dual-fuel injector, the nozzle coupling sleeve is a high-temperature-resistant nozzle coupling sleeve made of a high-temperature-resistant material.
As an optimal scheme of an integrated dual-fuel injector, the valve body comprises a first valve body, a second valve body and a third valve body which are connected in sequence, the oil cavity is arranged along the axial direction of the second valve body and the axial direction of the third valve body, the oil injection hole is formed in the end, far away from the second valve body, of the third valve body, the oil injection channel is formed in the first valve body and the second valve body, the air inlet channel is formed in the second valve body and the third valve body, the oil control inlet channel and the oil control return channel are equally arranged in the first valve body, the second valve body and the third valve body respectively, and the third valve body and the nozzle sleeve define the pressure regulating cavity.
As a preferred scheme of the integrated dual-fuel injector, a first locking cap is arranged on the periphery of the joint of the first valve body and the second valve body, a second locking cap is arranged on the periphery of the joint of the second valve body and the third valve body, and one end of the second locking cap is abutted to the periphery of the nozzle sleeve along the radial direction.
As a preferable scheme of the integrated dual-fuel injector, the number of the gas injection holes is several, and the gas injection holes are distributed at intervals along the circumferential direction of the nozzle sleeve.
As a preferred scheme of the integrated dual-fuel injector, the number of the oil injection holes is a plurality, and the oil injection holes are distributed at intervals along the circumferential direction of the valve body.
The invention also provides an injection method of the integrated dual-fuel injector, which comprises the following steps:
moving the valve rod towards the direction far away from the oil injection hole, separating the valve body from the valve rod, and injecting combustible oil into the combustion chamber from the oil injection hole for combustion after the combustible oil enters the oil cavity through the oil injection oil duct;
moving the valve rod towards the direction close to the oil injection hole, wherein the valve body is abutted with the valve rod;
the oil control valve is opened, the regulating oil in the pressure regulating cavity can flow out through the oil control oil return channel and the oil control valve in sequence, the pressure of the regulating oil in the pressure regulating cavity on the pressure regulating assembly is reduced, meanwhile, gas reaches the bottom of the nozzle sleeve through the gas inlet channel, the pressure regulating assembly moves towards the direction far away from the gas orifice, the pressure regulating assembly is separated from the nozzle sleeve, the gas inlet channel is communicated with the gas orifice, and the gas is sprayed into the combustion chamber through the gas orifice to be combusted;
close accuse fuel tap, accuse oil return passageway is cut off, the pressure regulating intracavity adjust fluid right the pressure increase of pressure regulating assembly, the pressure regulating assembly orientation is close to the direction of fumarole removes, and is up to the pressure regulating assembly with nozzle sleeve butt, the fumarole with the inlet channel disconnection.
The invention has the beneficial effects that: the integrated dual-fuel injector disclosed by the invention has the advantages that the structure is simple, the cost is low, the engine does not need to be changed, the switching of combustible oil liquid and gas is respectively realized by controlling the closing and the opening of the oil control valve, the combustion of the integrated dual-fuel injector on two fuels is realized, the injection effect is better, if the oil control valve of the integrated dual-fuel injector is always kept in a closed state or an open state, the working mode of only injecting the combustible oil liquid or only injecting the gas can be realized, and the applicability is higher.
The injection method of the integrated dual-fuel injector disclosed by the invention is simple to operate, has a good injection effect, and can realize the injection of two fuels.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a cross-sectional view of an integrated dual fuel injector provided in a specific embodiment of the present invention;
fig. 2 is an enlarged view of a portion of fig. 1 at a in accordance with the present invention.
In the figure:
101. an oil chamber; 102. an oil spray hole; 103. an oil injection duct; 104. an air intake passage; 105. controlling oil to enter the channel; 106. an oil control and return passage; 11. a first valve body; 12. a second valve body; 13. a third valve body;
21. a valve stem; 22. an oil control valve; 23. an oil injection valve; 24. an oil control connector; 240. an oil control inlet;
3. a nozzle sleeve; 301. a gas injection hole; 302. a pressure regulating cavity;
4. a voltage regulating component; 41. an elastic member; 42. a nozzle coupling sleeve;
51. a first locking cap; 52. a second locking cap; 53. and (5) sealing rings.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides an integrated dual fuel injector, as shown in fig. 1 and fig. 2, the integrated dual fuel injector includes a valve body, a valve rod 21, a nozzle sleeve 3, a pressure regulating assembly 4 and an oil control valve 22, the valve body is provided with an oil cavity 101, an oil injection hole 102, an oil injection passage 103, an air inlet passage 104, an oil control inlet passage 105 and an oil control return passage 106, the oil injection passage 103 and the oil injection hole 102 are respectively communicated with the oil cavity 101, the valve rod 21 is arranged in the oil cavity 101, the oil injection hole 102 is isolated from the oil injection passage 103 when the valve rod 21 is abutted against the valve body, the oil injection hole 102 is communicated with the oil injection passage 103 when the valve rod 21 is separated from the valve body, the nozzle sleeve 3 is provided with an air injection hole 301, the nozzle sleeve 3 and the valve body define a pressure regulating cavity 302, one end of the pressure regulating cavity 302 is respectively communicated with the oil control inlet passage 105 and the oil control return passage 106, the other end is communicated with the air, the gas orifice 301 is isolated with inlet channel 104 when the pressure regulating subassembly 4 and the tip butt of nozzle cover 3, and the pressure regulating subassembly 4 can remove so that inlet channel 104 and gas orifice 301 communicate for nozzle cover 3 when inlet channel 104 lets in gas, and accuse oil valve 22 is located on accuse oil return passage 106. The oil control valve 22 of the present embodiment is a solenoid valve and is used for controlling the on-off of the oil control return passage 106.
It should be noted that, the valve body of this embodiment is provided with a first inclined surface, and the valve rod 21 is provided with a second inclined surface matched with the first inclined surface. When the valve rod 21 abuts against the valve body, the first inclined surface and the second inclined surface are attached, the oil injection hole 102 and the oil injection oil passage 103 are in a disconnected state, and at the moment, the integrated dual-fuel injector cannot inject combustible oil to the combustion chamber. When the fuel injection valve 23 controls the valve rod 21 to move upwards, the first inclined surface is separated from the second inclined surface, the fuel injection hole 102 is communicated with the fuel injection oil channel 103 through the oil cavity 101, and the integrated dual-fuel injector can inject combustible oil into the combustion chamber.
The integrated dual-fuel injector provided by the embodiment can directly replace the existing electronic control high-pressure common rail injector, the structure of an engine is not required to be changed, the structure is simple, the cost is low, the switching of combustible oil and gas is respectively realized by controlling the closing and the opening of the oil control valve 22, the integrated dual-fuel injector can burn two kinds of fuel, the injection effect is good, if the oil control valve 22 of the integrated dual-fuel injector is always kept in a closed state or an open state, the working mode of only injecting the combustible oil or only injecting the gas can be realized, and the applicability is high.
The integrated dual-fuel injector provided by the embodiment can realize injection of different fuels according to energy distribution and fuel price volatility difference in different regions, can meet the requirements of different areas and different users, and can select a working mode of only burning combustible oil, a working mode of only burning gas or a dual-fuel working mode of simultaneously burning combustible oil and gas, thereby providing the most economic use mode for customers.
Specifically, the number of the fumaroles 301 of this embodiment is a plurality of, and a plurality of fumaroles 301 is along the even interval distribution of circumference of nozzle collar 3, and the number of nozzle opening 102 is a plurality of, and a plurality of nozzle opening 102 is along the even interval distribution of circumference of valve body. The arrangement of the gas injection holes 301 and the oil injection holes 102 can ensure the pressure balance of the nozzle sleeve 3 and the valve rod 21, simultaneously increase the uniformity of the injection of combustible oil or gas, and reduce the probability of inclination of the nozzle sleeve 3 caused by the thrust of the first liquid or gas on the nozzle sleeve 3. Of course, in other embodiments, it is also possible to arrange several gas injection holes 301 in a central symmetry manner with respect to the valve rod 21, or arrange several oil injection holes 102 in a central symmetry manner with respect to the valve rod 21, so as to ensure pressure equalization between the nozzle block 3 and the valve rod 21.
As shown in fig. 1, the integrated dual fuel injector of this embodiment further includes an oil control connector 24 communicated with the oil return tank, the oil control connector 24 is provided with an oil control inlet 240, the oil control inlet 240 is directly communicated with the oil return tank, one end of the oil control inlet channel 105 is communicated with the oil return tank through the oil control connector 24, the other end is directly communicated with the pressure regulating cavity 302, and oil in the oil return tank can sequentially enter the pressure regulating cavity 302 through the oil control connector 24 and the oil control inlet channel 105. When the oil control valve 22 is opened, oil in the pressure regulating cavity 302 can return to the oil return tank through the oil control oil return passage 106 and the oil control valve 22, so that the oil is recovered, when the oil control valve 22 is closed, the oil in the pressure regulating cavity 302 is increased, the pressure at the upper end of the pressure regulating cavity 302 is increased, the pressure regulating assembly 4 is abutted against the nozzle sleeve 3, and the air inlet passage 104 and the air injection hole 301 are in an isolated state.
It should be noted that, when the pressure regulating assembly 4 abuts against the nozzle sleeve 3, the air inlet passage 104 and the air injection hole 301 are in an isolated state, so that when the integrated dual-fuel injector injects combustible oil, gas hardly remains in the pressure regulating cavity 302.
As shown in fig. 1, the integrated dual fuel injector of the present embodiment includes an oil injection valve 23, where the oil injection valve 23 is an electromagnetic valve, the oil injection valve 23 is connected to a valve rod 21, and the oil injection valve 23 is configured to control movement of the valve rod 21 to connect or disconnect an oil injection hole 102 with an oil injection passage 103, so that combustible oil can enter or cannot enter a combustion chamber.
As shown in fig. 2, the pressure regulating assembly 4 of the present embodiment includes an elastic member 41 and a nozzle coupling sleeve 42, the elastic member 41 is a spring, one end of the elastic member 41 abuts against the valve body, the other end of the elastic member 41 abuts against one end of the nozzle coupling sleeve 42, the other end of the nozzle coupling sleeve 42 can abut against the nozzle sleeve 3, the nozzle coupling sleeve 42 is in clearance fit with the valve body and the nozzle sleeve 3, and the air injection hole 301 is isolated from the air intake passage 104 when the nozzle coupling sleeve 42 abuts against the nozzle sleeve 3.
Specifically, the elastic coefficient of the spring of this embodiment is 10N/mm, and after the elastic element 41 and the nozzle coupling sleeve 42 are installed in the pressure regulating cavity 302, the spring is in a compressed state, and the pretightening force of the spring is 40N, so as to ensure that the air injection hole 301 has a proper opening pressure when communicating with the air inlet channel 104. Of course, in other embodiments of the present invention, the elastic coefficient and the pre-tightening force of the spring are not limited to the limitations of the embodiment, and may also be other values, specifically related to the pressure of the injected gas, when the pressure of the gas is higher, the elastic coefficient and the pre-tightening force of the spring may be appropriately increased, and when the pressure of the gas is lower, the elastic coefficient and the pre-tightening force of the spring may be appropriately decreased, specifically set according to actual requirements.
It should be noted that, the integrated dual-fuel injector of this embodiment does not limit the pressure of the combustible oil and the pressure of the gas, that is, the pressure of the combustible oil and the pressure of the gas can be continuously raised, so that the integrated dual-fuel injector has a high upgrading potential.
The end face of the nozzle coupling sleeve 42 in this embodiment, which is abutted against the elastic member 41, is a first circular ring, the end face of the nozzle coupling sleeve 42, which is abutted against the valve body, is a second circular ring, and the area of the first circular ring is larger than that of the second circular ring. Specifically, the width of the first ring is 1mm, and the width of the second ring is 0.6 mm. The nozzle coupling sleeve 42 of the present embodiment is a high temperature resistant nozzle coupling sleeve made of a high temperature resistant material.
As shown in fig. 1, the valve body of the present embodiment includes a first valve body 11, a second valve body 12 and a third valve body 13 connected in sequence, the third valve body 13 and the nozzle sleeve 3 define a pressure regulating chamber 302, the nozzle sleeve 3 is connected with the third valve body 13 by screw threads, and in order to ensure the sealing property of the connection between the two, as shown in fig. 2, a sealing ring 53 is provided between the nozzle sleeve 3 and the third valve body 13. In order to ensure the tight connection of the first valve body 11 and the second valve body 12, as shown in fig. 1, a first locking cap 51 is disposed on the outer periphery of the connection portion of the first valve body 11 and the second valve body 12, and in order to ensure the tight connection of the second valve body 12 and the third valve body 13, as shown in fig. 1, a second locking cap 52 is disposed on the outer periphery of the connection portion of the second valve body 12 and the third valve body 13, and one end of the second locking cap 52 radially abuts against the outer periphery of the nozzle sleeve 3. The oil chamber 101 is arranged along the axial direction of the second valve body 12 and the third valve body 13, the oil injection hole 102 is arranged at one end of the third valve body 13 far away from the second valve body 12, the oil injection passage 103 is arranged on the first valve body 11 and the second valve body 12, the inlet of the oil injection passage 103 is arranged on the end surface of the first valve body 11, the outlet is communicated with the oil chamber 101, the air inlet passage 104 is arranged on the second valve body 12 and the third valve body 13, the inlet of the air inlet passage 104 is arranged on the side surface of the middle part of the second valve body 12, the outlet is arranged on the end surface of the third valve body 13, the oil control inlet passage 105 and the oil control return passage 106 are respectively arranged on the first valve body 11, the third valve body 12 and the third valve body 13, the oil control connecting piece 24, that is, the inlet of the control oil inlet passage 105 is located on the side of the first valve body 11, and the outlet of the control oil inlet passage 105 is located above the pressure regulating chamber 302 and directly communicates with the pressure regulating chamber 302. Because the air inlet channel 104 is not communicated with the oil injection channel 103, the integrated dual-fuel injector does not affect each other when injecting combustible oil and gas.
Further, the nozzle coupling sleeve 42 and the third valve body 13 of the present embodiment form a first couple, the outer diameter of the first couple is 7mm, the length of the first couple is 5mm, and the gap between the nozzle coupling sleeve 42 and the third valve body 13 is 2 μm-4 μm. The nozzle coupling sleeve 42 and the nozzle sleeve 3 form a second matching part, the outer diameter of the second matching part is 9mm, the length of the second matching part is 5.5mm, and the gap between the nozzle coupling sleeve 42 and the nozzle sleeve 3 is 2-4 μm.
The present embodiment further provides an injection method of the integrated dual fuel injector according to the present embodiment, including the following steps:
step one, introducing regulating oil into the oil control inlet channel 105;
moving the valve rod 21 towards the direction far away from the oil injection hole 102, separating the valve body from the valve rod 21, and injecting combustible oil into the combustion chamber from the oil injection hole 102 for combustion after the combustible oil enters the oil cavity 101 through the oil injection oil duct 103;
moving the valve rod 21 towards the direction close to the oil injection hole 102, and enabling the valve body to be abutted against the valve rod 21;
opening the oil control valve 22, enabling the regulating oil in the pressure regulating cavity 302 to flow out through the oil control oil return passage 106 and the oil control valve 22 in sequence, reducing the pressure of the regulating oil in the pressure regulating cavity 302 on the pressure regulating assembly 4, meanwhile, enabling the gas to reach the bottom of the nozzle sleeve 3 through the gas inlet passage 104, enabling the pressure regulating assembly 4 to move towards the direction far away from the gas ejecting hole 301, enabling the pressure regulating assembly 4 to be separated from the nozzle sleeve 3, enabling the gas inlet passage 104 to be communicated with the gas ejecting hole 301, and enabling the gas to be ejected into the combustion chamber through the gas ejecting hole 301 for combustion;
and step five, closing the oil control valve 22, cutting off the oil control return passage 106, increasing the pressure of the regulating oil liquid in the pressure regulating cavity 302 on the pressure regulating assembly 4, moving the pressure regulating assembly 4 towards the direction close to the gas orifice 301 until the pressure regulating assembly 4 is abutted against the nozzle sleeve 3, and disconnecting the gas orifice 301 from the gas inlet passage 104.
The second step to the fifth step are a cycle process of the integrated dual-fuel injector, namely the integrated dual-fuel injector firstly injects diesel oil into the combustion chamber, then injects gas into the combustion chamber, then injects diesel oil into the combustion chamber, and then injects gas into the combustion chamber, and the cycle is repeated.
The combustible oil injected into the combustion chamber by the integrated dual-fuel injector of the embodiment is diesel oil, and the combustible gas is natural gas. In other embodiments, the combustible oil and gas may be other combustible oil or combustible gas, specifically selected according to the actual needs of the user.
The injection method of the integrated dual-fuel injector provided by the embodiment is simple to operate, has a good injection effect, and can realize injection of two fuels.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (8)
1. An integrated dual fuel injector, comprising:
the oil control valve comprises a valve body, wherein an oil cavity (101), an oil injection hole (102), an oil injection oil channel (103), an air inlet channel (104), an oil control inlet channel (105) and an oil control return channel (106) are arranged on the valve body, and the oil injection oil channel (103) and the oil injection hole (102) are respectively communicated with the oil cavity (101);
the valve rod (21) is arranged in the oil cavity (101), the oil injection hole (102) is isolated from the oil injection oil channel (103) when the valve rod (21) is abutted to the valve body, and the oil injection hole (102) is communicated with the oil injection oil channel (103) when the valve rod (21) is separated from the valve body;
the oil control device comprises a nozzle sleeve (3), wherein an air injection hole (301) is formed in the nozzle sleeve (3), a pressure regulating cavity (302) is defined by the nozzle sleeve (3) and the valve body, one end of the pressure regulating cavity (302) is communicated with an oil control inlet channel (105) and an oil control return channel (106) respectively, and the other end of the pressure regulating cavity is communicated with the air injection hole (301);
the pressure regulating assembly (4) is arranged in the pressure regulating cavity (302), the pressure regulating assembly (4) is assembled with the valve body and the nozzle sleeve (3) in a clearance mode respectively, the air injection hole (301) is isolated from the air inlet channel (104) when the pressure regulating assembly (4) is abutted to the end portion of the nozzle sleeve (3), and the pressure regulating assembly (4) can move relative to the nozzle sleeve (3) when the air inlet channel (104) is filled with air so that the air inlet channel (104) is communicated with the air injection hole (301);
the oil control valve (22), the said oil control valve (22) locates on the said oil control return oil channel (106);
the pressure regulating assembly (4) comprises an elastic piece (41) and a nozzle coupling sleeve (42), one end of the elastic piece (41) is abutted to the valve body, the other end of the elastic piece (41) is abutted to one end of the nozzle coupling sleeve (42), the other end of the nozzle coupling sleeve (42) can be abutted to the nozzle sleeve (3), the nozzle coupling sleeve (42) is in clearance fit with the valve body and the nozzle sleeve (3) respectively, and the air injection hole (301) is isolated from the air inlet channel (104) when the nozzle coupling sleeve (42) is abutted to the nozzle sleeve (3);
the nozzle coupling sleeve (42) and the end face abutted by the elastic piece (41) are first circular rings, the nozzle coupling sleeve (42) can be a second circular ring abutted by the end face abutted by the valve body, and the area of the first circular ring is larger than that of the second circular ring.
2. The integrated dual fuel injector as claimed in claim 1, further comprising an injection valve (23), the injection valve (23) being connected to the valve stem (21), the injection valve (23) being for controlling movement of the valve stem (21).
3. The integrated dual fuel injector as claimed in claim 1, wherein the nozzle coupling sleeve (42) is a high temperature resistant nozzle coupling sleeve of a high temperature resistant material.
4. Integrated dual fuel injector according to claim 1 characterized in that the valve body comprises a first valve body (11), a second valve body (12) and a third valve body (13) connected in sequence, the oil chamber (101) is arranged in the axial direction of the second valve body (12) and the third valve body (13), the oil injection hole (102) is arranged at one end of the third valve body (13) far away from the second valve body (12), the oil injection passage (103) is arranged on the first valve body (11) and the second valve body (12), the air inlet channel (104) is arranged on the second valve body (12) and the third valve body (13), the oil control inlet passage (105) and the oil control return passage (106) are respectively arranged on the first valve body (11), the second valve body (12) and the third valve body (13), the third valve body (13) and the nozzle sleeve (3) define the pressure regulating chamber (302).
5. The integrated dual fuel injector as claimed in claim 4, characterized in that the periphery of the connection of the first valve body (11) and the second valve body (12) is provided with a first locking cap (51), the periphery of the connection of the second valve body (12) and the third valve body (13) is provided with a second locking cap (52), and one end of the second locking cap (52) radially abuts against the periphery of the nozzle sleeve (3).
6. The integrated dual fuel injector as claimed in claim 1, characterized in that the number of the gas injection holes (301) is several, and the gas injection holes (301) are distributed at intervals along the circumferential direction of the nozzle sleeve (3).
7. The integrated dual fuel injector of claim 1 wherein the number of fuel injection orifices (102) is several, the fuel injection orifices (102) being spaced circumferentially of the valve body.
8. A method of injection of an integrated dual fuel injector as claimed in any of the claims 1 to 7 comprising the steps of:
moving the valve rod (21) towards a direction far away from the oil injection hole (102), separating the valve body from the valve rod (21), and injecting combustible oil into a combustion chamber from the oil injection hole (102) for combustion after the combustible oil enters the oil chamber (101) through the oil injection channel (103);
moving the valve rod (21) towards a direction close to the oil injection hole (102), wherein the valve body is abutted with the valve rod (21);
open accuse fuel tap (22), regulation fluid in pressure regulating chamber (302) can pass through in proper order accuse oil return passageway (106) with accuse fuel tap (22) flow, in pressure regulating chamber (302) regulation fluid is right the pressure of pressure regulating subassembly (4) reduces, and simultaneously gaseous passing through inlet channel (104) reachs the bottom of nozzle cover (3), pressure regulating subassembly (4) orientation is kept away from the direction removal of fumarole (301), pressure regulating subassembly (4) with nozzle cover (3) separation, inlet channel (104) with fumarole (301) intercommunication, gaseous through fumarole (301) spout into the combustion chamber burning;
close accuse fuel tap (22), accuse oil return passageway (106) is cut off, in pressure regulating chamber (302) adjust fluid right the pressure increase of pressure regulating subassembly (4), pressure regulating subassembly (4) orientation is close to the direction of fumarole (301) removes, until pressure regulating subassembly (4) with nozzle cover (3) butt, fumarole (301) with inlet channel (104) disconnection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN112459945B (en) * | 2020-11-24 | 2022-02-22 | 一汽解放汽车有限公司 | Ejector and engine |
| CN113719388B (en) * | 2021-08-20 | 2022-06-07 | 一汽解放汽车有限公司 | Dual-fuel injector |
| CN114033593B (en) * | 2021-11-02 | 2024-04-05 | 上海中船三井造船柴油机有限公司 | Integrated fuel injector device of dual-fuel low-speed diesel engine |
| CN114233545B (en) * | 2022-01-06 | 2022-10-11 | 一汽解放汽车有限公司 | Dual-fuel injector and engine |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2270346A (en) * | 1992-09-05 | 1994-03-09 | Lucas Ind Plc | I.C.engine dual fuel injection unit |
| JPH0874698A (en) * | 1994-09-12 | 1996-03-19 | Mitsubishi Heavy Ind Ltd | Binary injection valve of diesel engine |
| CN101117931A (en) * | 2007-09-04 | 2008-02-06 | 中国计量学院 | Double-layer injection fuel oil injector used for diesel oil and dimethyl ether |
| WO2017097413A1 (en) * | 2015-12-11 | 2017-06-15 | L'orange Gmbh | Fuel injector arrangement |
| WO2019072457A1 (en) * | 2017-10-11 | 2019-04-18 | Robert Bosch Gmbh | Gas and liquid fuel injection with a dual-fuel injection valve |
| CN109826738A (en) * | 2019-02-26 | 2019-05-31 | 一汽解放汽车有限公司 | A kind of dual fuel injector |
| CN110719994A (en) * | 2017-06-08 | 2020-01-21 | 莱奥林奇有限责任公司 | Fuel injector |
| CN111120166A (en) * | 2019-12-11 | 2020-05-08 | 一汽解放汽车有限公司 | Integrated direct-injection dual-fuel injector with check valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK179161B1 (en) * | 2016-05-26 | 2017-12-18 | Man Diesel & Turbo Filial Af Man Diesel & Turbo Se Tyskland | A large two-stroke compression-ignited internal combustion engine with fuel injection system for low flashpoint fuel and a fuel valve therefore |
-
2020
- 2020-05-29 CN CN202010478495.4A patent/CN111535957B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2270346A (en) * | 1992-09-05 | 1994-03-09 | Lucas Ind Plc | I.C.engine dual fuel injection unit |
| JPH0874698A (en) * | 1994-09-12 | 1996-03-19 | Mitsubishi Heavy Ind Ltd | Binary injection valve of diesel engine |
| CN101117931A (en) * | 2007-09-04 | 2008-02-06 | 中国计量学院 | Double-layer injection fuel oil injector used for diesel oil and dimethyl ether |
| WO2017097413A1 (en) * | 2015-12-11 | 2017-06-15 | L'orange Gmbh | Fuel injector arrangement |
| CN110719994A (en) * | 2017-06-08 | 2020-01-21 | 莱奥林奇有限责任公司 | Fuel injector |
| WO2019072457A1 (en) * | 2017-10-11 | 2019-04-18 | Robert Bosch Gmbh | Gas and liquid fuel injection with a dual-fuel injection valve |
| CN109826738A (en) * | 2019-02-26 | 2019-05-31 | 一汽解放汽车有限公司 | A kind of dual fuel injector |
| CN111120166A (en) * | 2019-12-11 | 2020-05-08 | 一汽解放汽车有限公司 | Integrated direct-injection dual-fuel injector with check valve |
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