CN113833592B - Injection valve subassembly, engine and vehicle - Google Patents

Injection valve subassembly, engine and vehicle Download PDF

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Publication number
CN113833592B
CN113833592B CN202111161632.2A CN202111161632A CN113833592B CN 113833592 B CN113833592 B CN 113833592B CN 202111161632 A CN202111161632 A CN 202111161632A CN 113833592 B CN113833592 B CN 113833592B
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China
Prior art keywords
valve
cavity
station
valve plug
fuel
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CN202111161632.2A
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Chinese (zh)
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CN113833592A (en
Inventor
王毓源
王金平
周飞章
曲怡霖
滕召威
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Weichai Power Co Ltd
Weifang Weichai Power Technology Co Ltd
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Weichai Power Co Ltd
Weifang Weichai Power Technology Co Ltd
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Priority to CN202111161632.2A priority Critical patent/CN113833592B/en
Publication of CN113833592A publication Critical patent/CN113833592A/en
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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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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 ejector pin deviates from terminal surface and the fluid chamber intercommunication of second end.

Description

Injection valve subassembly, engine and vehicle
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 jet 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 a first station and a 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 storage 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 storage 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 part corresponding to 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 resetting member and a driving member, a second valve cavity is formed in the housing, and the second valve cavity has a first communication port and a second communication port, where the first communication port is communicated with the outlet of the fluid cavity; 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 has a central hole and an oil passing hole, and the second valve plug is in sliding fit in the central hole to switch between the third station and the fourth station.
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 second oil ducts are in one-to-one correspondence with the 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 fig. 2, taking two fuels of fuel oil and fuel gas as examples, two fuel switch valves are arranged, specifically a fuel switch valve 2 for controlling the on-off of the high-pressure oil supply and a fuel switch valve 3 for controlling the on-off of the fuel gas supply; 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 an inner wall of the first valve cavity U1 between a first station and a second station along a preset direction V, the first valve plug 412 is in close contact with the inner wall of the first valve cavity U1 to prevent oil from flowing between the first valve cavity U1 and the second valve cavity U1, the first valve plug 412 may be specifically cylindrical, an 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 close to 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 movement direction of the first valve plug 412; when the first valve plug 412 is in the first station, the first end a blocks the fuel discharge passage T2, and when the first valve plug 412 is in the second station, 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 chamber U6 is further formed in the valve body 42, the fluid chamber U6 has an inlet P1 and an outlet P2, the outlet P2 of the fluid chamber U6 is communicated with the second switching valve 1, a second end B of the first valve plug 412 is connected with a push rod 411, and an end surface of the push rod 411, which is away from the second end B, is communicated with the fluid chamber U6. The inlet P1 may be in communication with high pressure oil.
In the above injection valve assembly, when there is no need to inject fuel, 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 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 to the second station from the first 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 desired to inject another fuel, a similar operation can be employed for another fuel switching valve. Specifically, when the engine runs until the piston approaches the top dead center, the fuel switch valve 2 is opened, high-pressure fuel is delivered to the pressure accumulation cavity U4 through the first delivery passage T5, the lifting surface is pressed by the fuel in the pressure accumulation cavity U4 along with the rapid rise of the pressure in the pressure accumulation cavity U4 to have a tendency of moving in the direction from the first end a to the second end B, then the second switch valve 1 is opened, the first valve plug 412 moves upwards, the pressure in the pressure accumulation cavity 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; one end of the valve needle 413 away from the first valve plug 412 forms a tip, one end of the fuel discharge passage T2 away from the fuel discharge passage T2 is provided with a fuel reservoir chamber U5, after the first valve plug 412 moves upwards, the fuel reservoir chamber U5 and the pressure storage chamber U4 are communicated through the above gap, 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 circle so as to inject fuel. When the first valve plug 412 is at the first position, the tip of the first valve plug is inserted into the receiving groove T6 and abuts against the edge of the receiving groove T6 to prevent the fuel in the fuel storage chamber U5 from being ejected, and when the first valve plug 412 moves upwards, the fuel in the fuel storage chamber 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 necessary 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 accumulation chamber U4 through the second delivery passage T7.
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 the inner diameter of the first valve cavity U1 and is between the maximum inner diameter and the minimum inner diameter of the part corresponding to the conical surface C; when the first valve plug 412 is in the first position, the tapered surface C is partially located 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 can be lifted and controls whether or not the communication between the pressure accumulation chamber U4 and the fuel discharge passage T2 is established.
In a specific embodiment, the first switching valve 4 further includes a first elastic restoring member 431, and the first elastic restoring member 431 is configured to provide a restoring force for the first valve plug 412 to return from the second position to the first position, and the restoring force is required to be overcome when the first valve plug 412 moves from the first position to the second position, and the restoring force and the fluid pressure in the fluid chamber U6 are balanced with the fluid pressure in the pressure accumulation chamber U4. After the pressure in the pressure accumulation chamber U4 decreases, the first elastic restoring member 431 drives the first valve plug 412 to move from the second station to the first station.
The first elastic restoring member 431 may be a coil spring; one side that first valve pocket U1 deviates from fuel vent 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 that includes a housing 12, a second valve plug, a second elastic restoring member 15 and a driving member, wherein a second valve cavity U2 is formed in the housing 12, the second valve cavity U2 has a first communication port G1 and a second communication port G2, and the first communication port G1 is communicated with the outlet of the fluid cavity U6; the second valve plug is provided with a third station and a fourth station, and when the second valve plug is positioned at the third station, the second valve plug blocks the first communication port G1; when the second valve plug is in the fourth station, the second valve plug avoids the first communication port G1; 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 15 is used for providing a restoring force for the second valve plug 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 can refer to the second switching valve 1, but the later oil passing passage T4 is not required to 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 cavity U3 communicates with the second valve cavity U2 through the oil passage T4, and particularly communicates with the space below the partition 16, so as to lubricate the first elastic restoring member 431 in the accommodating cavity 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 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 a specific embodiment, a partition plate 16 is arranged in the second valve cavity U2, the partition plate 16 is fixed to the inner wall of the second valve cavity U2, the partition plate 16 is provided with a central hole passage and an oil passing hole T1, and the second valve plug is in sliding fit in the central hole passage and limited in the preset direction V so as to switch between the third station and the fourth station.
In a specific embodiment, the partition 16 may be fixed by connecting fixing rings (see fig. 14a and 14 b) 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 stabilize the partition 16.
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 duct is connected with an inlet of the fluid cavity U6, the plurality of second oil ducts correspond to the plurality of fuel switch valves one to one, and each second oil duct is connected with the pressure accumulation cavity U4 through the corresponding fuel switch valve. Engine benefits refer to the injection valve assembly described above.
In a specific embodiment, the engine further comprises a third oil channel, and the third oil channel is connected with the outlet P2 of the fluid cavity U6 through the second switching valve 1, so that the high-pressure oil in the fluid cavity U6 can be discharged through the third oil channel, and particularly can be discharged to a low-pressure oil tank.
In one specific embodiment, the oil pressure of the third oil passage is lower than the oil pressure of the first oil passage and the oil pressure of the second oil passages, so that the high-pressure oil in the pressure accumulation cavity U4 can drive the first valve plug 412 to move towards the second station.
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 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 (9)

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 a first station and a 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;
a fuel discharge passage is connected to one side of the first valve cavity close to the first end;
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;
a fluid cavity is formed in the valve body, the fluid cavity is provided with an inlet and an outlet, the outlet of the fluid cavity is communicated with the second switch valve, the second end of the first valve plug is connected with a mandril, and the end surface of the mandril, which is far away from the second end, is communicated with the fluid cavity; and a channel between each fuel switch valve and the pressure accumulation cavity is isolated from the fluid cavity;
the first switching valve further comprises a first elastic resetting piece, and the first elastic resetting piece is used for providing a restoring force for the first valve plug to return from the second station to the first station;
the first elastic reset piece is a spiral spring;
an accommodating cavity is formed in one side, away from the fuel discharge channel, of the first valve cavity, the ejector rod penetrates through the accommodating cavity, the first elastic resetting piece is located in the accommodating 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, far away from the second end, of the inner wall of the accommodating cavity;
the second switch valve comprises a shell, a second valve plug, a second elastic reset piece and a driving piece, wherein a second valve cavity is formed in the shell, and is provided with a first communication port and a second communication port, and the first communication port is communicated with an outlet of the fluid cavity;
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;
the receiving chamber communicates with the second valve chamber.
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 jet valve assembly of claim 1 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.
4. The injection valve assembly of claim 3 wherein a partition is provided in the second valve chamber, the partition being fixed to an inner wall of the second valve chamber, the partition having a central bore and an oil passing hole, the second valve plug being slidably fitted in the central bore to switch between the third and fourth stations.
5. The jet valve assembly of claim 4 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.
6. 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 5; 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.
7. The engine of claim 6, further comprising a third oil passage connected through an outlet of the second on-off valve fluid chamber.
8. The engine of claim 7, 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.
9. A vehicle comprising an engine as claimed in any one of claims 6 to 8.
CN202111161632.2A 2021-09-30 2021-09-30 Injection valve subassembly, engine and vehicle Active CN113833592B (en)

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US4958605A (en) * 1989-04-10 1990-09-25 Euron S.P.A. Fuel injection nozzle
CA2633846C (en) * 2008-06-27 2009-12-29 Westport Power Inc. Fuel injection valve and method for co-injecting a liquid and a gaseous fuel into the combustion chamber of an internal combustion engine
KR101364416B1 (en) * 2009-12-07 2014-02-17 맥알리스터 테크놀로지즈 엘엘씨 Integrated fuel injector igniters suitable for large engine applications and associated methods of use and manufacture
US8820295B2 (en) * 2011-09-30 2014-09-02 Caterpillar Inc. Single actuator fuel injector for dual fuels
JP5925104B2 (en) * 2012-10-19 2016-05-25 三菱重工業株式会社 Fuel gas injection valve, dual fuel gas engine, and fuel gas injection valve injection method
JP5955258B2 (en) * 2013-03-29 2016-07-20 三菱重工業株式会社 Fuel injection device and diesel engine
CN105041532B (en) * 2015-07-09 2018-07-27 胡松平 Diesel oil, alcohols double fuel integral type injector
JP2020159333A (en) * 2019-03-28 2020-10-01 株式会社デンソー Fluid injection device and fluid injection system

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