CN113623105A - Dual fuel injector of small diameter - Google Patents
Dual fuel injector of small diameter Download PDFInfo
- Publication number
- CN113623105A CN113623105A CN202111169038.8A CN202111169038A CN113623105A CN 113623105 A CN113623105 A CN 113623105A CN 202111169038 A CN202111169038 A CN 202111169038A CN 113623105 A CN113623105 A CN 113623105A
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- Prior art keywords
- control
- hole
- metering valve
- oil
- main
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- 239000000446 fuel Substances 0.000 title claims abstract description 11
- 230000009977 dual effect Effects 0.000 title claims abstract description 7
- 238000002955 isolation Methods 0.000 claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 19
- 239000010959 steel Substances 0.000 claims description 19
- 230000005389 magnetism Effects 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 17
- 230000003044 adaptive effect Effects 0.000 claims description 9
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 75
- 239000007789 gas Substances 0.000 description 27
- 238000010586 diagram Methods 0.000 description 9
- 239000000295 fuel oil Substances 0.000 description 7
- 239000002737 fuel gas Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
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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
- 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
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0673—Valves; Pressure or flow regulators; Mixers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0673—Valves; Pressure or flow regulators; Mixers
- F02D19/0678—Pressure or flow regulators therefor; Fuel metering valves therefor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a small-diameter dual-fuel injector, which comprises an electromagnetic valve assembly and a metering valve assembly, wherein the electromagnetic valve assembly comprises a main coil, an auxiliary coil, a main armature, an auxiliary armature, a magnetic isolation ring, a magnetic isolation sleeve, a main spring and an auxiliary spring; the beneficial technical effects of the invention are as follows: a small diameter dual fuel injector is provided having a small radial size of both the solenoid valve assembly and the metering valve assembly, enabling the radial size of the injector to be effectively reduced.
Description
Technical Field
The present disclosure relates to engine injectors, and more particularly to a small diameter dual fuel injector.
Background
In order to realize independent control of fuel injection and fuel gas injection, two groups of electromagnetic valves are usually arranged on the existing dual-fuel injector for engines, and the two groups of electromagnetic valves are respectively used for controlling the timing and quantitative injection of fuel oil and fuel gas; in the prior art, when two groups of electromagnetic valves are arranged, the most common way is to arrange the two groups of electromagnetic valves in parallel, and then respectively equip the two groups of electromagnetic valves with corresponding armature actuators and metering valves, and the arrangement mode needs to occupy larger radial space, so that the radial size of the injector is larger, the miniaturization of the injector is not facilitated, and the size of an engine is indirectly increased.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a small-diameter dual-fuel injector, which comprises a solenoid valve assembly and a metering valve assembly, and is characterized in that: the electromagnetic valve assembly comprises a main coil, an auxiliary coil, a main armature, an auxiliary armature, a magnetism isolating ring, a magnetism isolating sleeve, a main spring and an auxiliary spring;
the auxiliary coil is coaxially arranged in an inner hole of the main coil, and an isolation structure is arranged between the main coil and the auxiliary coil; the bottom of the inner hole of the secondary coil forms a supporting surface; a main spring washer is arranged on the supporting surface, an auxiliary spring washer is arranged in an inner hole of the main spring washer, and the lower end surface of the auxiliary spring washer is higher than the lower end surface of the main spring washer;
the main armature is composed of a body, an actuating column and a plurality of guide columns; the body is a disc-shaped structure body, a circular groove is formed in the middle of the upper end face of the body, and the circular groove enables the upper end face of the body to form an annular area; the execution column is arranged on the lower end face of the body and is coaxial with the circular groove; an axial through hole is formed in the middle of the bottom surface of the circular groove and penetrates through the actuating column; the guide posts are arranged on the bottom surface of the circular groove, the upper end surfaces of the guide posts are higher than the upper end surface of the body, and the guide posts are distributed around the axis of the axial through hole in a ring manner; the outer contour of the guide posts in the radial direction of the main armature encloses a first cylindrical area, and the first cylindrical area is matched with an inner hole of the auxiliary coil; the inner contour of the guide posts in the radial direction of the main armature encloses a second cylindrical area; two axial notches are arranged on the lower end surface of the execution column, the two axial notches are symmetrical in position, and the two axial notches enable the lower end of the execution column to form two operation handles; the main armature is arranged on the lower side of the main coil, the annular region is opposite to the main coil in position, and the first cylindrical region is sleeved in an inner hole of the auxiliary coil;
the auxiliary armature is composed of a connecting disc, a spring connecting column and a driving column; the spring connecting column is arranged on the upper end face of the connecting disc, and the outer diameter of the spring connecting column is matched with the second cylindrical area; a step surface is arranged on the upper end surface of the spring connecting column; a plurality of adapting holes are formed in the connecting disc, correspond to the guide columns one by one and are through holes; the driving column is arranged on the lower end face of the connecting disc;
the outer contour of the magnetism isolating sleeve is matched with the corresponding areas of the circular groove and the axial through hole, the inner contour of the magnetism isolating sleeve is matched with the shapes of the connecting disc and the driving column, and the magnetism isolating sleeve is provided with a through hole matched with the guide column;
the magnetic isolation sleeve is attached to the main armature, the auxiliary armature is arranged in the magnetic isolation sleeve, the driving column is positioned in the axial through hole, the lower end of the driving column is positioned on the upper side of the axial gap, the lower end of the magnetic isolation sleeve is higher than the lower end of the driving column, the guide columns are sleeved in the plurality of adaptive holes in a one-to-one correspondence mode, and the spring connecting column is sleeved in the second cylindrical area;
the magnetic isolation ring is of a circular structure, the magnetic isolation ring is sleeved in an inner hole of the secondary coil, the lower end face of the magnetic isolation ring is in contact with the upper end face of the guide column, and the inner diameter of the magnetic isolation ring is larger than the outer diameter of the spring connecting column;
the main spring is arranged in an inner hole of the secondary coil, the lower end of the main spring is in contact with the magnetism isolating ring, the upper end of the main spring is in contact with the main spring washer, and the main spring is in a compressed state; the auxiliary spring is arranged in an inner hole of the main spring, the lower end of the auxiliary spring is in contact with the step surface, the upper end of the auxiliary spring is in contact with the auxiliary spring washer, and the auxiliary spring is in a compressed state;
when the main armature is located at the position of the maximum upward stroke and the auxiliary armature is located at the position of the maximum downward stroke, the distance between the bottom surface of the circular groove and the lower end surface of the connecting disc is larger than the thickness of the magnetism isolating sleeve;
the metering valve assembly comprises an oil control metering valve and a gas control metering valve;
an oil control conical surface is arranged on the upper end surface of the oil control metering valve, an oil inlet metering hole is arranged in the oil control metering valve, the upper port of the oil inlet metering hole is communicated with the bottom of the oil control conical surface, and the lower port of the oil inlet metering hole is communicated with the lower end surface of the oil control metering valve; the upper end surface of the oil control metering valve is provided with two control holes, the control holes are through holes, the control holes axially penetrate the oil control metering valve, the control holes cut the oil control conical surface part, the two control holes are symmetrical in position, and the oil inlet metering hole is arranged in the area between the two control holes; an inwards concave operation cavity is arranged in the middle of the lower end face of the oil control metering valve, and the cross section of the operation cavity covers the operation hole; the operation cavity is isolated from the oil inlet metering hole; the side wall of the operation cavity is communicated with the outer wall of the oil control metering valve through an air discharge passage; the air discharge passage and the oil inlet metering hole are arranged in a staggered mode, and the air discharge passage and the control hole are arranged in a staggered mode;
an air control conical surface is arranged on the upper end surface of the air control and metering valve, an air inlet is coaxially arranged at the bottom of the air control conical surface, and the lower port of the air inlet is communicated with the lower end surface of the air control and metering valve; an oil inlet hole is formed in the air control metering valve, the upper end port of the oil inlet hole is communicated with the upper end face of the air control metering valve, and the lower end port of the oil inlet hole is communicated with the lower end face of the air control metering valve;
the lower end face of the oil control metering valve is in contact with the upper end face of the gas control metering valve; the oil control conical surface, the operation cavity and the air control conical surface are coaxial, and the oil inlet hole is communicated with the oil inlet metering hole;
the metering valve assembly is arranged at the lower side of the electromagnetic valve assembly; the gas control conical surface is provided with a gas control steel ball, the upper side of the gas control steel ball is in contact with a gas control sealing ball seat, and the gas control sealing ball seat and the gas control steel ball are both positioned in the control cavity; the two operation handles penetrate through the operation holes and then are in contact with the annular bulge on the side wall of the air control sealing ball seat, and the two operation handles respectively correspond to the two operation holes; the oil control conical surface is provided with an oil control steel ball, the upper side of the oil control steel ball is in contact with an oil control sealing ball seat, and the upper end of the oil control sealing ball seat is in contact with the lower end of the driving column.
The principle of the invention is as follows: high-pressure fuel oil and high-pressure fuel gas respectively enter the ejector through different pipelines, wherein one part of the high-pressure fuel oil is guided to an oil nozzle at the lower part of the ejector, the other part of the high-pressure fuel oil is guided to the oil inlet, one part of the high-pressure fuel gas is guided to an air nozzle at the lower part of the ejector, and the other part of the high-pressure fuel gas is guided to the air inlet; when the main coil is electrified, the main armature is lifted upwards, the gas control steel ball is jacked up by high-pressure gas, the high-pressure gas is decompressed through the gas inlet hole and the gas release channel, the gas control needle valve at the gas nozzle is jacked up by the high-pressure gas, the gas nozzle is opened, and the ejector performs gas injection action; when the auxiliary coil is electrified, the auxiliary armature is lifted upwards, the oil control steel ball is jacked up by high-pressure fuel oil, the high-pressure fuel oil is decompressed through the oil inlet metering hole, the oil control needle valve at the oil nozzle is jacked up by the high-pressure fuel oil, the oil nozzle is opened, and the injector performs oil injection action.
The oil and gas control principle of the invention is the same as the prior art, the core innovation point of the invention is that the structure of the electromagnetic valve assembly and the metering valve assembly is changed, compared with the structural form that the electromagnetic valve and the metering valve are arranged in parallel in the prior art, the main coil, the auxiliary coil, the main armature and the auxiliary armature in the electromagnetic valve assembly are all arranged in a coaxial nesting mode, and the oil control metering valve and the gas control metering valve in the metering valve assembly are arranged in a coaxial stacking mode, so that the radial size of the electromagnetic valve assembly and the radial size of the metering valve assembly are greatly reduced, the radial size of the injector is indirectly reduced, and the overall size of the engine can be finally reduced.
The beneficial technical effects of the invention are as follows: a small diameter dual fuel injector is provided having a small radial size of both the solenoid valve assembly and the metering valve assembly, enabling the radial size of the injector to be effectively reduced.
Drawings
FIG. 1 is a first schematic structural diagram of a solenoid valve assembly;
FIG. 2 is a schematic diagram of a structure of a solenoid valve assembly (the cutting positions of FIGS. 1 and 2 are different);
FIG. 3 is a first schematic diagram of the structure of a main armature;
FIG. 4 is a second structural diagram of the main armature;
FIG. 5 is a schematic diagram of a main armature structure;
FIG. 6 is a first structural diagram of the secondary armature;
FIG. 7 is a structural schematic diagram of a secondary armature;
FIG. 8 is a schematic diagram I of the matching relationship of the solenoid valve assembly and the metering valve assembly;
FIG. 9, the solenoid valve assembly and the metering valve assembly are in a matching relationship, namely two are shown (the cutting positions of FIGS. 8 and 9 are different);
FIG. 10 is a first schematic view of a metering valve assembly;
FIG. 11 is a second schematic view of the metering valve assembly (different cut-away positions in FIGS. 10 and 11);
FIG. 12 is a schematic diagram of an oil control metering valve;
FIG. 13 is a schematic structural view of the present invention;
the names corresponding to each mark in the figure are respectively: the device comprises a main coil 1, an auxiliary coil 2, a main armature 3, a body 3-1, an execution column 3-2, a guide column 3-3, an axial gap 3-4, an auxiliary armature 4, a connecting disc 4-1, a spring connecting column 4-2, a driving column 4-3, an adapting hole 4-4, a step surface 4-5, a magnetic isolation ring 5, a magnetic isolation sleeve 6, a main spring 7, an auxiliary spring 8, an oil control sealing ball seat 9, an air control sealing ball seat 10, an oil control steel ball 11, an armature guide sleeve 12, an adjusting pad 13, an oil control metering valve 14, an operating hole 14-1, an oil control conical surface 14-2, an oil inlet metering hole 14-3, an operating cavity 14-4, an air discharge channel 14-5, an air control metering valve 15, an air control conical surface 15-1, an air inlet hole 15-2, an oil inlet hole 15-3 and an air control steel ball 16.
Detailed Description
A small diameter dual fuel injector including a solenoid valve assembly and a metering valve assembly is innovative in that: the electromagnetic valve assembly comprises a main coil 1, an auxiliary coil 2, a main armature 3, an auxiliary armature 4, a magnetic isolation ring 5, a magnetic isolation sleeve 6, a main spring 7 and an auxiliary spring 8;
the auxiliary coil 2 is coaxially arranged in an inner hole of the main coil 1, and an isolation structure is arranged between the main coil 1 and the auxiliary coil 2; the bottom of the inner hole of the secondary coil 2 forms a supporting surface; a main spring washer is arranged on the supporting surface, an auxiliary spring washer is arranged in an inner hole of the main spring washer, and the lower end surface of the auxiliary spring washer is higher than the lower end surface of the main spring washer;
the main armature 3 consists of a body 3-1, an execution column 3-2 and a plurality of guide columns 3-3; the body 3-1 is a disc-shaped structure body, a circular groove is formed in the middle of the upper end face of the body 3-1, and the circular groove enables the upper end face of the body 3-1 to form an annular area; the actuating column 3-2 is arranged on the lower end face of the body 3-1, and the actuating column 3-2 is coaxial with the circular groove; an axial through hole is formed in the middle of the bottom surface of the circular groove and penetrates through the actuating column 3-2; the guide posts 3-3 are arranged on the bottom surface of the circular groove, the upper end surfaces of the guide posts 3-3 are higher than the upper end surface of the body 3-1, and the guide posts 3-3 are distributed around the axis of the axial through hole in a ring shape; the outer contour of the guide posts 3-3 in the radial direction of the main armature 3 encloses a first cylindrical area which is matched with the inner hole of the secondary coil 2; the inner contour of the plurality of guide posts 3-3 in the radial direction of the main armature 3 encloses a second cylindrical area; two axial notches 3-4 are arranged on the lower end face of the execution column 3-2, the two axial notches 3-4 are symmetrical in position, and the two axial notches 3-4 enable the lower end of the execution column 3-2 to form two operation handles; the main armature 3 is arranged at the lower side of the main coil 1, the annular region is opposite to the main coil 1, and the first cylindrical region is sleeved in an inner hole of the auxiliary coil 2;
the auxiliary armature 4 consists of a connecting disc 4-1, a spring connecting column 4-2 and a driving column 4-3; the spring connecting column 4-2 is arranged on the upper end face of the connecting disc 4-1, and the outer diameter of the spring connecting column 4-2 is matched with the second cylindrical area; a step surface 4-5 is arranged on the upper end surface of the spring connecting column 4-2; a plurality of adaptive holes 4-4 are formed in the connecting disc 4-1, the adaptive holes 4-4 correspond to the guide columns 3-3 one by one, and the adaptive holes 4-4 are through holes; the driving column 4-3 is arranged on the lower end face of the connecting disc 4-1;
the outer contour of the magnetism isolating sleeve 6 is matched with the corresponding areas of the circular groove and the axial through hole, the inner contour of the magnetism isolating sleeve 6 is matched with the shapes of the connecting disc 4-1 and the driving column 4-3, and the magnetism isolating sleeve 6 is provided with a through hole matched with the guiding column 3-3;
the magnetic isolation sleeve 6 is attached to the main armature 3, the auxiliary armature 4 is arranged in the magnetic isolation sleeve 6, the driving column 4-3 is positioned in the axial through hole, the lower end of the driving column 4-3 is positioned on the upper side of the axial gap 3-4, the lower end of the magnetic isolation sleeve 6 is higher than the lower end of the driving column 4-3, the guide columns 3-3 are sleeved in the adaptive holes 4-4 in a one-to-one correspondence mode, and the spring connecting column 4-2 is sleeved in the second cylindrical area;
the magnetic isolation ring 5 is of a circular structure, the magnetic isolation ring 5 is sleeved in an inner hole of the auxiliary coil 2, the lower end face of the magnetic isolation ring 5 is in contact with the upper end face of the guide post 3-3, and the inner diameter of the magnetic isolation ring 5 is larger than the outer diameter of the spring connecting post 4-2;
the main spring 7 is arranged in an inner hole of the secondary coil 2, the lower end of the main spring 7 is in contact with the magnetism isolating ring 5, the upper end of the main spring 7 is in contact with a main spring washer, and the main spring 7 is in a compressed state; the auxiliary spring 8 is arranged in an inner hole of the main spring 7, the lower end of the auxiliary spring 8 is in contact with the step surface 4-5, the upper end of the auxiliary spring 8 is in contact with an auxiliary spring washer, and the auxiliary spring 8 is in a compressed state;
when the main armature 3 is positioned at the position of the maximum upward stroke and the auxiliary armature 4 is positioned at the position of the maximum downward stroke, the distance between the bottom surface of the circular groove and the lower end surface of the connecting disc 4-1 is larger than the thickness of the magnetism isolating sleeve 6;
the metering valve assembly comprises an oil control metering valve 14 and an air control metering valve 15;
an oil control conical surface 14-2 is arranged on the upper end surface of the oil control metering valve 14, an oil inlet metering hole 14-3 is arranged inside the oil control metering valve 14, the upper port of the oil inlet metering hole 14-3 is communicated with the bottom of the oil control conical surface 14-2, and the lower port of the oil inlet metering hole 14-3 is communicated with the lower end surface of the oil control metering valve 14; the upper end face of the oil control metering valve 14 is provided with two control holes 14-1, the control holes 14-1 are through holes, the control holes 14-1 axially penetrate the oil control metering valve 14, the control holes 14-1 cut the oil control conical surface 14-2, the two control holes 14-1 are symmetrical in position, and the oil inlet metering holes 14-3 are arranged in the area between the two control holes 14-1; an inwards concave operation cavity 14-4 is arranged in the middle of the lower end face of the oil control metering valve 14, and the operation hole 14-1 is covered by the cross section of the operation cavity 14-4; the operating cavity 14-4 is isolated from the oil inlet metering hole 14-3; the side wall of the operating cavity 14-4 is communicated with the outer wall of the oil control and metering valve 14 through an air discharge passage 14-5; the air leakage passage 14-5 and the oil inlet metering hole 14-3 are arranged in a staggered mode, and the air leakage passage 14-5 and the control hole 14-1 are arranged in a staggered mode;
an air control conical surface 15-1 is arranged on the upper end surface of the air control metering valve 15, an air inlet hole 15-2 is coaxially arranged at the bottom of the air control conical surface 15-1, and the lower end port of the air inlet hole 15-2 is communicated with the lower end surface of the air control metering valve 15; an oil inlet 15-3 is arranged in the air control metering valve 15, the upper end port of the oil inlet 15-3 is communicated with the upper end face of the air control metering valve 15, and the lower end port of the oil inlet 15-3 is communicated with the lower end face of the air control metering valve 15;
the lower end face of the oil control and metering valve 14 is contacted with the upper end face of the gas control and metering valve 15; the oil control conical surface 14-2, the operation cavity 14-4 and the air control conical surface 15-1 are coaxial, and the oil inlet hole 15-3 is communicated with the oil inlet metering hole 14-3;
the metering valve assembly is arranged at the lower side of the electromagnetic valve assembly; the gas control conical surface 15-1 is provided with a gas control steel ball 16, the upper side of the gas control steel ball 16 is in contact with a gas control sealing ball seat 10, and the gas control sealing ball seat 10 and the gas control steel ball 16 are both positioned in the operation cavity 14-4; the two operation handles penetrate through the operation holes 14-1 and then are in contact with the annular bulges on the side wall of the air control sealing ball seat 10, and the two operation handles respectively correspond to the two operation holes 14-1; an oil control steel ball 11 is arranged on the oil control conical surface 14-2, the upper side of the oil control steel ball 11 is in contact with an oil control sealing ball seat 9, and the upper end of the oil control sealing ball seat 9 is in contact with the lower end of the driving column 4-3.
Claims (1)
1. A small diameter dual fuel injector including a solenoid valve assembly and a metering valve assembly characterized by: the electromagnetic valve assembly comprises a main coil (1), an auxiliary coil (2), a main armature (3), an auxiliary armature (4), a magnetic isolation ring (5), a magnetic isolation sleeve (6), a main spring (7) and an auxiliary spring (8);
the auxiliary coil (2) is coaxially arranged in an inner hole of the main coil (1), and an isolation structure is arranged between the main coil (1) and the auxiliary coil (2); the bottom of the inner hole of the secondary coil (2) forms a supporting surface; a main spring washer is arranged on the supporting surface, an auxiliary spring washer is arranged in an inner hole of the main spring washer, and the lower end surface of the auxiliary spring washer is higher than the lower end surface of the main spring washer;
the main armature (3) consists of a body (3-1), an actuating column (3-2) and a plurality of guide columns (3-3); the body (3-1) is a disc-shaped structure body, a circular groove is formed in the middle of the upper end face of the body (3-1), and an annular area is formed on the upper end face of the body (3-1) through the circular groove; the actuating column (3-2) is arranged on the lower end face of the body (3-1), and the actuating column (3-2) is coaxial with the circular groove; an axial through hole is formed in the middle of the bottom surface of the circular groove and penetrates through the actuating column (3-2); the guide posts (3-3) are arranged on the bottom surface of the circular groove, the upper end surfaces of the guide posts (3-3) are higher than the upper end surface of the body (3-1), and the guide posts (3-3) are distributed around the axis of the axial through hole in a ring shape; the outer contour of the guide posts (3-3) in the radial direction of the main armature (3) encloses a first cylindrical area which is matched with the inner hole of the secondary coil (2); the inner contour of the guide columns (3-3) in the radial direction of the main armature (3) encloses a second cylindrical area; two axial notches (3-4) are arranged on the lower end face of the execution column (3-2), the two axial notches (3-4) are symmetrical in position, and the two axial notches (3-4) enable the lower end of the execution column (3-2) to form two operation handles; the main armature (3) is arranged on the lower side of the main coil (1), the annular region is opposite to the main coil (1), and the first cylindrical region is sleeved in an inner hole of the auxiliary coil (2);
the auxiliary armature (4) consists of a connecting disc (4-1), a spring connecting column (4-2) and a driving column (4-3); the spring connecting column (4-2) is arranged on the upper end face of the connecting disc (4-1), and the outer diameter of the spring connecting column (4-2) is matched with the second cylindrical area; a step surface (4-5) is arranged on the upper end surface of the spring connecting column (4-2); a plurality of adaptive holes (4-4) are formed in the connecting disc (4-1), the adaptive holes (4-4) correspond to the guide columns (3-3) one by one, and the adaptive holes (4-4) are through holes; the driving column (4-3) is arranged on the lower end face of the connecting disc (4-1);
the outer contour of the magnetism isolating sleeve (6) is matched with the corresponding areas of the circular groove and the axial through hole, the inner contour of the magnetism isolating sleeve (6) is matched with the shapes of the connecting disc (4-1) and the driving column (4-3), and the magnetism isolating sleeve (6) is provided with the through hole matched with the guiding column (3-3);
the magnetic isolation sleeve (6) is attached to the main armature (3), the auxiliary armature (4) is arranged in the magnetic isolation sleeve (6), the driving column (4-3) is positioned in the axial through hole, the lower end of the driving column (4-3) is positioned on the upper side of the axial gap (3-4), the lower end of the magnetic isolation sleeve (6) is higher than the lower end of the driving column (4-3), the guide columns (3-3) are sleeved in the adaptive holes (4-4) in a one-to-one correspondence mode, and the spring connecting column (4-2) is sleeved in the second cylindrical area;
the magnetic isolation ring (5) is of a circular ring structure, the magnetic isolation ring (5) is sleeved in an inner hole of the auxiliary coil (2), the lower end face of the magnetic isolation ring (5) is in contact with the upper end face of the guide post (3-3), and the inner diameter of the magnetic isolation ring (5) is larger than the outer diameter of the spring connecting post (4-2);
the main spring (7) is arranged in an inner hole of the auxiliary coil (2), the lower end of the main spring (7) is in contact with the magnetism isolating ring (5), the upper end of the main spring (7) is in contact with a main spring gasket, and the main spring (7) is in a compressed state; the auxiliary spring (8) is arranged in an inner hole of the main spring (7), the lower end of the auxiliary spring (8) is in contact with the step surface (4-5), the upper end of the auxiliary spring (8) is in contact with an auxiliary spring gasket, and the auxiliary spring (8) is in a compressed state;
when the main armature (3) is positioned at the position of the maximum upward stroke and the auxiliary armature (4) is positioned at the position of the maximum downward stroke, the distance between the bottom surface of the circular groove and the lower end surface of the connecting disc (4-1) is larger than the thickness of the magnetism isolating sleeve (6);
the metering valve assembly comprises an oil control metering valve (14) and an air control metering valve (15);
an oil control conical surface (14-2) is arranged on the upper end surface of the oil control metering valve (14), an oil inlet metering hole (14-3) is arranged inside the oil control metering valve (14), the upper port of the oil inlet metering hole (14-3) is communicated with the bottom of the oil control conical surface (14-2), and the lower port of the oil inlet metering hole (14-3) is communicated with the lower end surface of the oil control metering valve (14); two control holes (14-1) are formed in the upper end face of the oil control metering valve (14), the control holes (14-1) are through holes, the oil control metering valve (14) is axially communicated through the control holes (14-1), the oil control conical surface (14-2) is partially cut through the control holes (14-1), the two control holes (14-1) are symmetrical in position, and the oil inlet metering hole (14-3) is formed in the area between the two control holes (14-1); an inwards concave operation cavity (14-4) is arranged in the middle of the lower end face of the oil control metering valve (14), and the cross section of the operation cavity (14-4) covers the operation hole (14-1); the operating cavity (14-4) is isolated from the oil inlet metering hole (14-3); the side wall of the operating cavity (14-4) is communicated with the outer wall of the oil control metering valve (14) through an air discharge passage (14-5); the air release passage (14-5) and the oil inlet metering hole (14-3) are arranged in a staggered manner, and the air release passage (14-5) and the control hole (14-1) are arranged in a staggered manner;
an air control conical surface (15-1) is arranged on the upper end surface of the air control metering valve (15), an air inlet hole (15-2) is coaxially arranged at the bottom of the air control conical surface (15-1), and the lower end port of the air inlet hole (15-2) is communicated with the lower end surface of the air control metering valve (15); an oil inlet hole (15-3) is formed in the air control metering valve (15), the upper end port of the oil inlet hole (15-3) is communicated with the upper end face of the air control metering valve (15), and the lower end port of the oil inlet hole (15-3) is communicated with the lower end face of the air control metering valve (15);
the lower end face of the oil control metering valve (14) is in contact with the upper end face of the gas control metering valve (15); the oil control conical surface (14-2), the control cavity (14-4) and the air control conical surface (15-1) are coaxial, and the oil inlet hole (15-3) is communicated with the oil inlet metering hole (14-3);
the metering valve assembly is arranged at the lower side of the electromagnetic valve assembly; the gas control conical surface (15-1) is provided with a gas control steel ball (16), the upper side of the gas control steel ball (16) is in contact with a gas control sealing ball seat (10), and the gas control sealing ball seat (10) and the gas control steel ball (16) are both positioned in the operation cavity (14-4); the two operation handles penetrate through the operation holes (14-1) and then are in contact with the annular bulge on the side wall of the air control sealing ball seat (10), and the two operation handles respectively correspond to the two operation holes (14-1); an oil control steel ball (11) is arranged on the oil control conical surface (14-2), the upper side of the oil control steel ball (11) is in contact with an oil control sealing ball seat (9), and the upper end of the oil control sealing ball seat (9) is in contact with the lower end of the driving column (4-3).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111169038.8A CN113623105B (en) | 2021-10-08 | 2021-10-08 | Small diameter dual fuel injector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111169038.8A CN113623105B (en) | 2021-10-08 | 2021-10-08 | Small diameter dual fuel injector |
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| CN113623105A true CN113623105A (en) | 2021-11-09 |
| CN113623105B CN113623105B (en) | 2024-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4218021A (en) * | 1977-10-03 | 1980-08-19 | General Motors Corporation | Electromagnetic fuel injector |
| WO1994019599A1 (en) * | 1993-02-16 | 1994-09-01 | Siemens Automotive L.P. | Fuel injector |
| JPH07317631A (en) * | 1993-12-28 | 1995-12-05 | Elasis Sistema Ric Fiat Nel Mezzogiorno Soc Consortile Per Azioni | Electromagnetic weighing valve of fuel injection device |
| US20100236526A1 (en) * | 2009-03-20 | 2010-09-23 | Tianjin University | Common rail electronic control injector |
| DE102012224247A1 (en) * | 2012-12-21 | 2014-06-26 | Robert Bosch Gmbh | Fuel injector i.e. common-rail injector, for use with self-ignition engine, has magnet armature indirectly connected with coupler, which delimits adjusting element over coupling element by spring element |
| CN105745433A (en) * | 2013-11-18 | 2016-07-06 | 罗伯特·博世有限公司 | Valve for metering fluid |
| CN108749850A (en) * | 2018-04-28 | 2018-11-06 | 中铁十二局集团有限公司 | A kind of shunter anticreep hitch switching device and hitch anti-dropout control method |
| CN215979655U (en) * | 2021-10-08 | 2022-03-08 | 中国重汽集团重庆燃油喷射系统有限公司 | Dual fuel injector of small diameter |
-
2021
- 2021-10-08 CN CN202111169038.8A patent/CN113623105B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4218021A (en) * | 1977-10-03 | 1980-08-19 | General Motors Corporation | Electromagnetic fuel injector |
| WO1994019599A1 (en) * | 1993-02-16 | 1994-09-01 | Siemens Automotive L.P. | Fuel injector |
| JPH07317631A (en) * | 1993-12-28 | 1995-12-05 | Elasis Sistema Ric Fiat Nel Mezzogiorno Soc Consortile Per Azioni | Electromagnetic weighing valve of fuel injection device |
| US20100236526A1 (en) * | 2009-03-20 | 2010-09-23 | Tianjin University | Common rail electronic control injector |
| DE102012224247A1 (en) * | 2012-12-21 | 2014-06-26 | Robert Bosch Gmbh | Fuel injector i.e. common-rail injector, for use with self-ignition engine, has magnet armature indirectly connected with coupler, which delimits adjusting element over coupling element by spring element |
| CN105745433A (en) * | 2013-11-18 | 2016-07-06 | 罗伯特·博世有限公司 | Valve for metering fluid |
| CN108749850A (en) * | 2018-04-28 | 2018-11-06 | 中铁十二局集团有限公司 | A kind of shunter anticreep hitch switching device and hitch anti-dropout control method |
| CN215979655U (en) * | 2021-10-08 | 2022-03-08 | 中国重汽集团重庆燃油喷射系统有限公司 | Dual fuel injector of small diameter |
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| CN113623105B (en) | 2024-05-10 |
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Address after: 401120 No.6 cuining Road, jingkaiyuan, Liangjiang New District, Yubei District, Chongqing Applicant after: Heavy Oil High Tech Electronic Fuel Injection System Co.,Ltd. Address before: 401120 No.6 cuining Road, jingkaiyuan, Liangjiang New District, Yubei District, Chongqing Applicant before: Heavy oil high tech electronic fuel injection system (Chongqing) Co.,Ltd. Address after: 401120 No.6 cuining Road, jingkaiyuan, Liangjiang New District, Yubei District, Chongqing Applicant after: Heavy oil high tech electronic fuel injection system (Chongqing) Co.,Ltd. Address before: 401120 No.6 cuining Road, jingkaiyuan, Liangjiang New District, Yubei District, Chongqing Applicant before: CHONGQING FUEL INJECTION SYSTEM CO., LTD. OF CHINA NATIONAL HEAVY DUTY TRUCK Group Corp. |
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