CN113833592A - Injection valve subassembly, engine and vehicle - Google Patents
Injection valve subassembly, engine and vehicle Download PDFInfo
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- CN113833592A CN113833592A CN202111161632.2A CN202111161632A CN113833592A CN 113833592 A CN113833592 A CN 113833592A CN 202111161632 A CN202111161632 A CN 202111161632A CN 113833592 A CN113833592 A CN 113833592A
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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
- 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
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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
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0613—Switch-over from one fuel to another
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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
- F02D19/0676—Multi-way valves; Switch-over valves
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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
- F02D19/0686—Injectors
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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
- 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
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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)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to the technical field of vehicles and discloses an injection valve assembly, an engine and a vehicle.A first switch valve comprises a valve body and a first valve plug, wherein a first valve cavity is arranged in the valve body, the first valve plug is positioned in the first valve cavity and is in sliding fit with the inner wall of the first valve cavity between a first station and a second station along a preset direction, and one side of the first valve cavity, which is close to a first end, is connected with a fuel discharge channel; when the first valve plug is positioned at the first station, the first end blocks the fuel discharge channel, and when the first valve plug is positioned at the second station, the first end avoids the fuel discharge channel; the lifting surface of the first valve plug and the inner wall of the first valve cavity enclose a pressure storage cavity, and each fuel switch valve is communicated with the pressure storage cavity; still be formed with the fluid chamber in the valve body, the fluid chamber has entry and export, the export and the second ooff valve intercommunication of fluid chamber, and the second end of first valve plug is connected with the ejector pin, and the terminal surface that the ejector pin deviates from the second end communicates with the fluid chamber.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to an injection valve assembly, an engine and a vehicle.
Background
The conventional dual-fuel engine adopts an in-cylinder direct injection (HPDI) mode, which is beneficial to greatly improving the fuel substitution rate of the dual-fuel engine, and the fuel substitution rate can reach 95% by adopting an HPDI technology; however, in order to realize direct injection in the dual-fuel cylinder, the fuel injector has the functions of injecting fuel oil and injecting fuel gas at the same time; in the prior art, fuel oil and fuel gas can be simultaneously injected in a cylinder by a mode of sleeving a fuel gas injection valve outside an oil injector, and the machining difficulty is increased by the sleeved structure. Therefore, how to realize multiple fuel injections with a simple structure is an urgent technical problem to be solved.
Disclosure of Invention
The invention discloses an injection valve assembly, an engine and a vehicle, which are used for realizing multiple kinds of fuel injection with a simple structure.
In order to achieve the purpose, the invention provides the following technical scheme:
in a first aspect, there is provided a spray valve assembly comprising: a first switching valve, a second switching valve and a plurality of fuel switching valves; the first switch valve comprises a valve body and a first valve plug, a first valve cavity is formed in the valve body, the first valve plug is located in the first valve cavity and is in sliding fit with the inner wall of the first valve cavity between the first station and the second station along a preset direction, and the first valve plug is provided with a first end and a second end which are opposite to each other in the preset direction; one side of the first valve cavity close to the first end is connected with a fuel discharge passage; when the first valve plug is in the first station, the first end blocks the fuel discharge passage, and when the first valve plug is in the second station, the first end avoids the fuel discharge passage; the first valve plug is provided with a lifting surface, the lifting surface and the inner wall of the first valve cavity form a pressure accumulation cavity in a surrounding mode, in a preset direction, the lifting surface faces the direction from the second end to the first end, and each fuel switch valve is communicated with the pressure accumulation cavity; still be formed with the fluid chamber in the valve body, the fluid chamber has entry and export, the export of fluid chamber with the second ooff valve intercommunication, the second end of first valve plug is connected with the ejector pin, the ejector pin deviates from the terminal surface of second end with the fluid chamber intercommunication.
In the above injection valve assembly, when the fuel is not required to be injected, the fluid pressure in the fluid chamber and the fuel pressure in the accumulator chamber keep the first valve plug balanced in the preset direction; when a certain fuel needs to be injected through the fuel discharge channel, the fuel switch valve corresponding to the fuel is only required to be opened, the fuel enters the pressure accumulation cavity, the pressure in the pressure accumulation cavity is increased, at the moment, the second switch valve is opened, the fluid in the fluid cavity is discharged out of the fluid cavity through the second switch valve, the pressure in the fluid cavity is reduced, the fuel in the pressure accumulation cavity enables the first valve plug to return from the first station to the second station, the first end of the first valve plug is avoided from the fuel discharge channel, and the fuel in the pressure accumulation cavity is discharged through the fuel discharge channel. When it is necessary to inject another fuel, a similar operation can be employed for another fuel switching valve.
Optionally, a tapered surface is formed around the first end, wherein the smaller end of the tapered surface faces away from the second end, the tapered surface forming the lifting surface; the inner diameter of the fuel discharge passage is smaller than that of the first valve cavity and is between the maximum inner diameter and the minimum inner diameter of the corresponding part of the conical surface; when the first valve plug is at the first station, the conical surface part is positioned in the fuel discharge passage and is abutted against a step surface formed by the first valve cavity and the fuel discharge passage.
Optionally, the first switching valve further includes a first elastic resetting member, and the first elastic resetting member is configured to provide a restoring force for the first valve plug to return from the second station to the first station.
Optionally, the first elastic restoring member is a coil spring; the first valve cavity deviates from one side of the fuel discharge passage and is provided with a containing cavity, the ejector rod penetrates through the containing cavity, the first elastic resetting piece is located in the containing cavity and sleeved on the ejector rod, one end of the first elastic resetting piece is connected with the second end of the first valve plug, and the other end of the first elastic resetting piece is connected with the wall surface of the second end, which is far away from the inner wall of the containing cavity.
Optionally, the second switching valve includes a housing, a second valve plug, a second elastic reset member, and a driving member, wherein a second valve chamber is formed in the housing, and the second valve chamber has a first communication port and a second communication port, and the first communication port communicates with the outlet of the fluid chamber; the second valve plug has a third station and a fourth station, and when the second valve plug is in the third station, the second valve plug blocks the first communication port; when the second valve plug is in the fourth station, the second valve plug avoids the first communication port; the driving piece is used for driving the second valve plug from the third station to the fourth station, and the second elastic resetting piece is used for providing a restoring force for the second valve plug to return from the fourth station to the third station.
Optionally, the receiving chamber is in communication with the second valve chamber.
Optionally, a coil is disposed at an end of the second valve cavity close to the second communication port, and the second valve plug is an iron core and disposed opposite to the coil.
Optionally, a partition plate is arranged in the second valve cavity, the partition plate is fixed to the inner wall of the second valve cavity, the partition plate is provided with a central hole passage and an oil passing hole, and the second valve plug is in sliding fit in the central hole passage so as to switch between the third station and the fourth positioning.
Optionally, two sides of the partition in the thickness direction are respectively connected with a fixing ring, and each fixing ring is fixedly connected with the inner wall of the second valve cavity.
In a second aspect, an engine is provided, the engine comprising a first oil passage, a plurality of second oil passages, and the injection valve assembly of any of the above aspects; the first oil duct is connected with an inlet of the fluid cavity, the plurality of second oil ducts are in one-to-one correspondence with the plurality of fuel switch valves, and each second oil duct is connected with the pressure accumulation cavity through the corresponding fuel switch valve.
The engine and the injection valve assembly have the same advantages compared with the prior art, and the detailed description is omitted.
Optionally, the engine further comprises a third oil passage connected through an outlet of the second switching valve fluid chamber.
Alternatively, the oil pressure of the third oil passage is lower than the oil pressures of the first oil passage and the plurality of second oil passages, respectively.
In a third aspect, a vehicle is provided, the vehicle comprising the engine of any one of the above aspects.
The vehicle and the engine have the same advantages compared with the prior art, and the detailed description is omitted.
Drawings
FIG. 1 is a cross-sectional view of a jetting valve assembly provided by an embodiment of the present application;
fig. 2 is a top view of a jetting valve assembly provided by an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1 and 2:
the injection valve assembly that this application embodiment provided includes: a first switch valve 4, a second switch valve 1 and a plurality of fuel switch valves, in fig. 1 and 2, taking the supply of two fuels, namely fuel switch valve 2 for controlling the on-off of the high-pressure oil supply and fuel switch valve 3 for controlling the on-off of the gas supply, as an example; the first switching valve 4 includes a valve body 42 and a first valve plug 412, the valve body 42 has a first valve cavity U1 therein, the first valve plug 412 is located in the first valve cavity U1 and is in sliding fit with the inner wall of the first valve cavity U1 along a preset direction V between a first station and a second station, the first valve plug 412 is in close contact with the inner wall of the first valve cavity U1 to prevent oil from flowing therebetween, the first valve plug 412 may be specifically cylindrical, the axis of the cylinder extends along the preset direction V, and the first valve plug 412 has a first end a and a second end B opposite to each other in the preset direction V; a fuel discharge passage T2 is connected to a side of the first valve chamber U1 adjacent the first end a, and the fuel discharge passage T2 also illustratively extends in a predetermined direction V so as to be coordinated with the direction of movement of the first valve plug 412; when the first valve plug 412 is in the first position, the first end A blocks the fuel discharge passage T2, and when the first valve plug 412 is in the second position, the first end A avoids the fuel discharge passage T2; the first valve plug 412 has a lifting surface, the lifting surface and the inner wall of the first valve cavity U1 define a pressure accumulation cavity U4, and in the preset direction V, the lifting surface faces the direction in which the second end B points to the first end a, and each fuel switch valve is communicated with the pressure accumulation cavity U4; a fluid cavity U6 is further formed in the valve body 42, the fluid cavity U6 is provided with an inlet P1 and an outlet P2, the outlet P2 of the fluid cavity U6 is communicated with the second switch valve 1, the second end B of the first valve plug 412 is connected with a push rod 411, and the end face, away from the second end B, of the push rod 411 is communicated with the fluid cavity U6. The inlet P1 may be in communication with high pressure oil.
In the above injection valve assembly, the fluid pressure in the fluid chamber U6 and the fuel pressure in the accumulator chamber U4 keep the first valve plug 412 balanced in the preset direction V when fuel injection is not required; when a certain fuel needs to be injected through the fuel discharge channel T2, only the fuel switch valve corresponding to the fuel needs to be opened, the fuel enters the pressure accumulation cavity U4, so that the pressure in the pressure accumulation cavity U4 is increased, at the moment, the second switch valve 1 is opened, the fluid in the fluid cavity U6 is discharged out of the fluid cavity U6 through the second switch valve 1, the pressure in the fluid cavity U6 is reduced, the fuel in the pressure accumulation cavity U4 enables the first valve plug 412 to return from the first station to the second station, the first end A avoids the fuel discharge channel T2, and the fuel in the pressure accumulation cavity U4 is discharged through the fuel discharge channel T2. When it is necessary to inject another fuel, a similar operation can be employed for another fuel switching valve. Specifically, when the engine is operated until the piston approaches the top dead center, the fuel switching valve 2 is opened, high-pressure fuel is delivered to the pressure accumulation chamber U4 through the first delivery passage T5, the lifting surface is pressed by the fuel in the pressure accumulation chamber U4 with the rapid rise of the pressure in the pressure accumulation chamber U3578, so that the second switching valve 1 is opened, the first valve plug 412 moves upwards, the pressure in the pressure accumulation chamber U4 is injected through the fuel discharge passage T2, specifically, the valve needle 413 is arranged at the first end a, the valve needle 413 is arranged in the fuel discharge passage T2, and the outer diameter is smaller than the inner diameter of the fuel discharge passage T2, so that a gap can be formed between the two, and the fuel can pass through; an end of the valve needle 413 remote from the first valve plug 412 is formed as a tip, an end of the fuel discharge passage T2 remote from the fuel discharge passage T2 is provided with a fuel reservoir chamber U5, the fuel reservoir chamber U5 and the pressure accumulation chamber U4 communicate through the above gap after the first valve plug 412 moves up, a receiving groove T6 is formed at a position directly opposite to the above tip, and a nozzle hole T3 surrounds the receiving groove T6 by one turn so as to inject fuel. When the first valve plug 412 is at the first position, the tip end of the first valve plug 412 is inserted into the receiving groove T6 and abuts against the edge of the receiving groove T6 to prevent the fuel in the fuel reservoir U5 from being ejected, and when the first valve plug 412 moves upwards, the fuel in the fuel reservoir U5 can be ejected through the receiving groove T6 and the nozzle hole T3, and the first on-off valve 4 forms a needle valve. Thereafter, when it is desired to inject the gas, the fuel switching valve 3 and the second switching valve 1 are opened, and the gas is introduced from the fuel switching valve 3 into the pressure accumulating chamber U4 through the second delivery passage T6.
One particular possible form of the lifting surface is as follows: a conical surface C is formed around the first end A, wherein the end with the smaller outer diameter of the conical surface C faces away from the second end B, and the conical surface C forms the lifting surface; the inner diameter of the fuel discharge passage T2 is smaller than that of the first valve cavity U1 and is between the maximum inner diameter and the minimum inner diameter of the corresponding part of the conical surface C; when the first valve plug 412 is in the first position, the tapered surface C is partially disposed within the fuel discharge passage T2 and abuts a stepped surface formed by the first valve chamber U1 and the fuel discharge passage T2 to lock the fuel in the accumulator chamber U4. The tapered surface C may simultaneously serve to lift and control communication between the accumulator chamber U4 and the fuel discharge passage T2.
In one embodiment, the first switching valve 4 further includes a first resilient return member 431, and the first resilient return member 431 is configured to provide a return force for the first valve plug 412 to return from the second position to the first position, and the return force is overcome when the first valve plug 412 moves from the first position to the second position, and the return force and the fluid pressure in the fluid chamber U6 are balanced with the fluid pressure in the accumulator chamber U4. After the pressure in the pressure accumulation chamber U4 decreases, the first resilient return member 431 drives the first valve plug 412 to move from the first position to the second position.
The first elastic restoring member 431 may be a coil spring; one side of first valve pocket U1 deviating from fuel discharge passage T2 is equipped with and holds chamber U3, and ejector pin 411 runs through and holds chamber U3, and first elasticity resets 431 and is located and holds chamber U3, and on the ejector pin 411 was located to the cover, the one end of first elasticity resets 431 and is connected with the second end B of first valve plug 412, and the other end is connected with the wall surface of keeping away from second end B in the inner wall that holds chamber U3.
In a specific embodiment, the second switch valve 1 may have a specific structure including a housing 12, a second valve plug 16, a second elastic restoring member 15, and a driving member, wherein a second valve chamber U2 is formed in the housing 12, and the second valve chamber U2 has a first communication port G1 and a second communication port G2, wherein the first communication port G1 is communicated with an outlet of the fluid chamber U6; the second valve plug 16 has a third position and a fourth position, and when the second valve plug 16 is in the third position, the second valve plug 16 blocks the first communication port G1; when the second valve plug 16 is in the fourth position, the second valve plug 16 avoids the first communication opening G1; the driving member is used for driving the second valve plug 16 from the third station to the fourth station, and the second elastic resetting member 15 is used for providing a restoring force for the second valve plug 16 to return from the fourth station to the third station. The second elastic return element 15 may also be a helical spring. The structures of the fuel switching valve 2 and the fuel switching valve 3 may refer to the second switching valve 1, but the later oil passing passage T4 need not be provided as long as the switching function can be performed. The second communication port G2 may communicate with a tank of low-pressure oil.
In a specific embodiment, the accommodating chamber U3 is communicated with the second valve chamber U2 through the oil passage T4, and particularly communicated with the space below the partition 6, so as to lubricate the second elastic restoring member 15 in the accommodating chamber U3 and the push rod 411.
In a specific embodiment, a coil 13 is disposed at an end of the second valve chamber U2 near the second communication port G2, and the second valve plug 16 is an iron core and is disposed opposite to the coil 13. The coil 13 is energized to attract the core, and thus, fluid can flow.
In one specific embodiment, a partition 16 is disposed in the second valve chamber U2, the partition 16 is fixed to the inner wall of the second valve chamber U2, the partition 16 has a central hole and an oil passing hole T1, and the second valve plug 16 is slidably fitted in the central hole and is limited in the predetermined direction V to switch between the third position and the fourth position.
In a specific embodiment, the partition 16 may be fixed by connecting fixing rings (see fig. 14a and 14b) to both sides in the thickness direction thereof, and each fixing ring is fixedly connected to the inner wall of the second valve chamber U2 to make the partition 16 more stable.
Based on the same inventive concept, the embodiment of the application provides an engine, which comprises a first oil passage, a plurality of second oil passages and the injection valve assembly provided by the embodiment; the first oil passage is connected to an inlet of the fluid chamber U6, the plurality of second oil passages are in one-to-one correspondence with the plurality of fuel switching valves, and each of the second oil passages is connected to the accumulator chamber U4 through a corresponding fuel switching valve. Engine benefits reference is made to the injection valve assembly described above.
In a specific embodiment, the engine further includes a third oil passage connected to the outlet P2 of the fluid chamber U6 through the second switching valve 1 so that the high-pressure oil of the fluid chamber U6 can be discharged through the third oil passage, and in particular, can be discharged to a tank for low-pressure oil.
In one particular embodiment, the oil pressure of the third oil passage is lower than the oil pressure of the first oil passage and the second oil passages, respectively, such that the high-pressure oil in the accumulator chamber U4 may drive the first valve plug 412 to move toward the second position.
Based on the same inventive concept, the embodiment of the application provides a vehicle, and the vehicle comprises the engine. Advantageous effects of the vehicle reference is made to the above-described engine.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (13)
1. An injection valve assembly, comprising: a first switching valve, a second switching valve and a plurality of fuel switching valves; wherein the content of the first and second substances,
the first switch valve comprises a valve body and a first valve plug, a first valve cavity is formed in the valve body, the first valve plug is located in the first valve cavity and is in sliding fit with the inner wall of the first valve cavity between the first station and the second station along a preset direction, and the first valve plug is provided with a first end and a second end which are opposite to each other in the preset direction;
one side of the first valve cavity close to the first end is connected with a fuel discharge passage;
when the first valve plug is in the first station, the first end blocks the fuel discharge passage, and when the first valve plug is in the second station, the first end avoids the fuel discharge passage;
the first valve plug is provided with a lifting surface, the lifting surface and the inner wall of the first valve cavity form a pressure accumulation cavity in a surrounding mode, in a preset direction, the lifting surface faces the direction from the second end to the first end, and each fuel switch valve is communicated with the pressure accumulation cavity;
still be formed with the fluid chamber in the valve body, the fluid chamber has entry and export, the export of fluid chamber with the second ooff valve intercommunication, the second end of first valve plug is connected with the ejector pin, the ejector pin deviates from the terminal surface of second end with the fluid chamber intercommunication.
2. The jetting valve assembly of claim 1, wherein a tapered surface is formed around the first end, wherein the smaller end of the tapered surface faces away from the second end, the tapered surface forming the lifting surface;
the inner diameter of the fuel discharge passage is smaller than that of the first valve cavity and is between the maximum inner diameter and the minimum inner diameter of the corresponding part of the conical surface;
when the first valve plug is at the first station, the conical surface part is positioned in the fuel discharge passage and is abutted against a step surface formed by the first valve cavity and the fuel discharge passage.
3. The jetting valve assembly of claim 1, wherein the first switching valve further comprises a first resilient return member for providing a return force to the first valve plug from the second position to the first position.
4. The injection valve assembly of claim 3 wherein said first resilient return member is a coil spring;
the first valve cavity deviates from one side of the fuel discharge passage and is provided with a containing cavity, the ejector rod penetrates through the containing cavity, the first elastic resetting piece is located in the containing cavity and sleeved on the ejector rod, one end of the first elastic resetting piece is connected with the second end of the first valve plug, and the other end of the first elastic resetting piece is connected with the wall surface of the second end, which is far away from the inner wall of the containing cavity.
5. The injection valve assembly of claim 4, wherein the second on-off valve comprises a housing, a second valve plug, a second resilient return member, and a driving member, wherein a second valve chamber is formed in the housing, the second valve chamber having a first communication port and a second communication port, wherein the first communication port is in communication with the outlet of the fluid chamber;
the second valve plug has a third station and a fourth station, and when the second valve plug is in the third station, the second valve plug blocks the first communication port; when the second valve plug is in the fourth station, the second valve plug avoids the first communication port;
the driving piece is used for driving the second valve plug from the third station to the fourth station, and the second elastic resetting piece is used for providing a restoring force for the second valve plug to return from the fourth station to the third station.
6. The jetting valve assembly of claim 5, wherein the receiving cavity is in communication with the second valve cavity.
7. The jet valve assembly of claim 5 wherein a coil is disposed in the second valve chamber adjacent the second communication port, and the second valve plug is an iron core and is disposed opposite the coil.
8. The injection valve assembly of claim 7 wherein a diaphragm is disposed within the second valve chamber, the diaphragm being fixed to an inner wall of the second valve chamber, the diaphragm having a central bore and an oil passage, the second valve plug being slidably fitted in the central bore to switch between the third position and the fourth position.
9. The jet valve assembly of claim 8 wherein a retaining ring is attached to each side of the diaphragm in the thickness direction, each retaining ring being fixedly attached to the inner wall of the second valve chamber.
10. An engine comprising a first oil passage, a plurality of second oil passages, and the injection valve assembly of any one of claims 1 to 9; the first oil duct is connected with an inlet of the fluid cavity, the plurality of second oil ducts are in one-to-one correspondence with the plurality of fuel switch valves, and each second oil duct is connected with the pressure accumulation cavity through the corresponding fuel switch valve.
11. The engine of claim 10, further comprising a third oil passage connected through an outlet of the second on-off valve fluid chamber.
12. The engine of claim 11, wherein the oil pressure of the third oil passage is lower than the oil pressures of the first oil passage and the plurality of second oil passages, respectively.
13. A vehicle comprising an engine as claimed in any one of claims 10 to 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111161632.2A CN113833592B (en) | 2021-09-30 | 2021-09-30 | Injection valve subassembly, engine and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111161632.2A CN113833592B (en) | 2021-09-30 | 2021-09-30 | Injection valve subassembly, engine and vehicle |
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| Publication Number | Publication Date |
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| CN113833592A true CN113833592A (en) | 2021-12-24 |
| CN113833592B CN113833592B (en) | 2023-03-24 |
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| CN202111161632.2A Active CN113833592B (en) | 2021-09-30 | 2021-09-30 | Injection valve subassembly, engine and vehicle |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105041532A (en) * | 2015-07-09 | 2015-11-11 | 胡松平 | Diesel and alcohol dual-fuel integrated injector |
| WO2020195624A1 (en) * | 2019-03-28 | 2020-10-01 | 株式会社デンソー | Fluid injecting device, and fluid injecting system |
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| US4958605A (en) * | 1989-04-10 | 1990-09-25 | Euron S.P.A. | Fuel injection nozzle |
| CN102105673A (en) * | 2008-06-27 | 2011-06-22 | 西港能源有限公司 | Fuel injection valve and method for co-injecting a liquid and a gaseous fuel into the combustion chamber of an internal combustion engine |
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|---|---|
| CN113833592B (en) | 2023-03-24 |
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