CN115095459B - Fuel premixing injector - Google Patents
Fuel premixing injector Download PDFInfo
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- CN115095459B CN115095459B CN202210785396.XA CN202210785396A CN115095459B CN 115095459 B CN115095459 B CN 115095459B CN 202210785396 A CN202210785396 A CN 202210785396A CN 115095459 B CN115095459 B CN 115095459B
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- 239000000446 fuel Substances 0.000 title claims abstract description 321
- 238000002347 injection Methods 0.000 claims abstract description 130
- 239000007924 injection Substances 0.000 claims abstract description 130
- 238000002156 mixing Methods 0.000 claims abstract description 45
- 239000007788 liquid Substances 0.000 claims description 209
- 230000000903 blocking effect Effects 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 description 21
- 239000007789 gas Substances 0.000 description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003350 kerosene Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to the technical field of fuel injectors, and particularly discloses a fuel premix injector which comprises a body, a first fuel injection valve and a second fuel injection valve. Wherein, be equipped with first fuel inlet, second fuel inlet and jet on the body, be equipped with first fuel storage chamber and mixing chamber in the body, first fuel inlet and first fuel storage chamber intercommunication, second fuel inlet and jet all communicate with mixing chamber, be equipped with the first fuel outlet channel with mixing chamber intercommunication on the first fuel storage chamber. A first fuel injection valve is disposed in the first fuel reservoir, the first fuel injection valve being configured to control opening and closing of the first fuel outlet passage. A second fuel injection valve is provided in the mixing chamber, the second fuel injection valve being configured to control opening and closing of the injection ports. According to the fuel premixing injector, the first fuel and the second fuel share the injection port, the risk of blocking the injection port is reduced, and the fuel premixing injector is simple in structure and low in cost.
Description
Technical Field
The invention relates to the technical field of fuel injectors, in particular to a fuel premixing injector.
Background
For a mixed fuel engine, two fuel devices are typically provided for dual fuel supply. Two fuel devices typically include two injectors, one of which injects gaseous fuel and the other of which injects liquid fuel. Although the dual fuel supply is realized by the structure, the two injectors are adopted to inject fuel, so that the original engine is required to be greatly changed, more accessories are additionally added, and the installation becomes complicated.
In order to solve the above-described problems, an integrated injector capable of injecting two kinds of fuel is widely used, and the existing integrated injector is generally provided with a gas injection port and a liquid injection port separated from each other, and in operation, the integrated injector alternately sprays the fuel into the piston via the separated gas injection port and liquid injection port. Since the gas injection ports and the liquid injection ports are alternately used, clogging of the gas injection ports and the liquid injection ports due to carbon deposition is easily caused during combustion.
Accordingly, there is a need to provide a fuel premix injector that solves the above-mentioned problems.
Disclosure of Invention
The invention provides a fuel premixing injector which shares a group of injection ports, reduces the risk of injection port blockage, and has simple structure and lower cost.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a fuel premix injector comprising:
the device comprises a body, wherein a first fuel inlet, a second fuel inlet and an injection port are formed in the body, a first fuel storage cavity and a mixing cavity are formed in the body, the first fuel inlet is communicated with the first fuel storage cavity, the second fuel inlet and the injection port are communicated with the mixing cavity, and a first fuel outlet channel communicated with the mixing cavity is formed in the first fuel storage cavity;
a first fuel injection valve provided in the first fuel reservoir, the first fuel injection valve being configured to control opening and closing of the first fuel outlet passage;
and a second fuel injection valve provided in the mixing chamber, the first fuel injection valve being configured to control opening and closing of the injection port.
Optionally, the first fuel injection valve includes:
a first valve body;
the first control chamber is fixed in the body, a first liquid inlet and a first liquid outlet are formed in the first control chamber, a first elastic piece is arranged in the first control chamber, the first valve body is arranged in the first control chamber in a penetrating mode in a sealing mode and is connected with the first elastic piece, and the first valve body can move along the Z-axis direction to block or open the first fuel outlet channel;
one end of the first liquid inlet channel is communicated with the first fuel inlet;
the second liquid inlet channel, one end of the second liquid inlet channel is communicated with the other end of the first liquid inlet channel through a first throttle inlet part, a first throttle inlet hole is arranged on the first throttle inlet part, the cross section area of the first throttle inlet hole is smaller than that of the first liquid inlet channel, and the other end of the second liquid inlet channel is communicated with the first liquid inlet;
one end of the first liquid outlet channel is communicated with the first liquid outlet;
one end of the second liquid outlet channel is communicated with the other end of the first liquid outlet channel through a first throttling outlet part, a first throttling outlet hole is formed in the first throttling outlet part, and the cross section area of the first throttling outlet hole is smaller than that of the first liquid outlet channel;
a first fuel injection control valve provided on the second liquid outlet passage;
the diameter of the first inlet orifice is smaller than that of the first outlet orifice.
Optionally, a first guide rod is arranged in the first control chamber, the first guide rod extends along the Z-axis direction, one end of the first guide rod is connected with the first valve body, and the first guide rod is slidably connected with a first guide groove in the first control chamber.
Optionally, the first guide rod is cylindrical, and a plurality of first liquid storage rings are arranged on the circumferential surface of the first guide rod.
Optionally, the second fuel injection valve includes:
a second valve body;
the second control chamber is fixed in the body, a second liquid inlet and a second liquid outlet are formed in the second control chamber, a second elastic piece is arranged in the second control chamber, the second valve body is arranged in the second control chamber in a penetrating mode in a sealing mode and is connected with the second elastic piece, and the second valve body can move along the Z-axis direction to seal or open the jet orifice;
one end of the third liquid inlet channel is communicated with the first fuel inlet;
the second inlet throttle part is provided with a second inlet throttle hole, the cross section area of the second inlet throttle hole is smaller than that of the third inlet channel, and the other end of the fourth inlet channel is communicated with the second inlet port;
one end of the third liquid outlet channel is communicated with the second liquid outlet;
one end of the fourth liquid outlet channel is communicated with the other end of the third liquid outlet channel through a second throttling outlet part, a second throttling outlet hole is arranged on the second throttling outlet part, and the cross section area of the second throttling outlet hole is smaller than that of the third liquid outlet channel;
a second fuel injection control valve provided on the fourth liquid outlet passage;
the diameter of the second inlet orifice is smaller than that of the second outlet orifice.
Optionally, a second guide rod is arranged in the second control chamber, the second guide rod extends along the Z-axis direction, one end of the second guide rod is connected with the second valve body, and the second guide rod is in sliding connection with a second guide groove in the second control chamber.
Optionally, the second guide rod is cylindrical, and a plurality of second liquid storage rings are arranged on the circumferential surface of the second guide rod.
Optionally, the first fuel storage cavity is arranged in the second valve body;
or, the body is of a split superposition type structure.
Optionally, a flow control portion is disposed on the first fuel outlet channel, and a flow control hole is disposed on the flow control portion, and a cross-sectional area of the flow control hole is smaller than a cross-sectional area of the first fuel outlet channel.
Optionally, a plurality of injection ports are provided, and the injection ports are arranged at intervals along the circumferential direction of the body; and/or
The first fuel outlet passages are provided in plurality and are arranged at intervals along the circumferential direction of the first fuel storage cavity.
The beneficial effects of the invention are as follows:
the invention provides a fuel premixing injector, which comprises a body, a first fuel injection valve and a second fuel injection valve. The first fuel injection valve is arranged to control the injection of the first fuel in the first fuel storage cavity, the injected first fuel enters the mixing cavity through the first fuel outlet channel, the second fuel injection valve is arranged to control the injection of the fuel in the mixing cavity, and the injected fuel is injected through the injection port. When the fuel premixing injector works, the first fuel and the second fuel are sprayed out from the injection port, and compared with the alternative injection of the gas fuel injection port and the liquid fuel injection port in the prior art, the fuel premixing injector effectively reduces the sediment on the injection port, and further reduces the risk of blocking the injection port.
Through setting up first fuel storage chamber and mixing chamber intercommunication to make first fuel get into first fuel storage chamber, the second fuel gets into the mixing chamber, through controlling first fuel injection and get into the mixing chamber, and control second fuel input mixing chamber, can control the fuel kind and the mixing ratio in the mixing chamber, and then the fuel of control jet injection is single fuel or mixed fuel, compares with prior art, can make the fuel mix according to different proportions before the injection, can realize the nimble ratio of first fuel and second fuel, and then realize multiple combustion modes.
Drawings
FIG. 1 is a schematic diagram of a fuel premix injector according to an embodiment of the present invention.
In the figure:
110. a first fuel inlet; 120. a second fuel inlet; 130. an ejection port; 140. a first fuel reservoir; 150. a mixing chamber; 160. a first fuel outlet passage;
200. a first fuel injection valve; 210. a first valve body; 220. a first control room; 221. a first liquid inlet; 222. a first liquid outlet; 223. a first elastic member; 224. a first guide bar; 230. a first liquid inlet channel; 231. a first inlet orifice; 240. a second liquid inlet channel; 250. a first liquid outlet channel; 251. a first orifice; 260. a second liquid outlet channel; 270. a first fuel injection control valve;
300. a second fuel injection valve; 310. a second valve body; 320. a second control chamber; 321. a second liquid inlet; 322. a second liquid outlet; 323. a second elastic member; 324. a second guide bar; 330. a third liquid inlet channel; 331. a second inlet orifice; 340. a fourth liquid inlet channel; 350. a third liquid outlet channel; 351. a second orifice; 360. a fourth liquid outlet channel; 370. a second fuel injection control valve;
410. a first delivery tube; 420. a first fuel pump;
510. a second delivery tube; 520. a second fuel surge tank; 530. a second fuel output valve.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
The invention provides a fuel premixing injector, which is provided with only one injection port 130, reduces the risk of blocking the injection port 130, and has simple structure and lower cost.
Specifically, as shown in FIG. 1, the fuel premix injector includes a body, a first fuel injection valve 200, and a second fuel injection valve 300. Wherein, the body is provided with a first fuel inlet 110, a second fuel inlet 120 and an injection port 130, a first fuel storage cavity 140 and a mixing cavity 150 are arranged in the body, the first fuel inlet 110 is communicated with the first fuel storage cavity 140, and the first fuel enters the first fuel storage cavity 140 from the first fuel inlet 110. The first fuel may be any fuel that is in a liquid state at standard temperature and pressure, such as diesel, methanol, dimethyl ether, kerosene, and the like. Of course, the first fuel and the second fuel may be both gas fuel or both liquid fuel, and may be selected according to actual needs. The secondary fuel may be any fuel that is in a gaseous state at standard temperature and pressure, such as ammonia, methane, hydrogen, nitrogen, and the like. The first fuel reservoir 140 is provided with a first fuel outlet passage 160 communicating with the mixing chamber 150, and the first fuel can enter the mixing chamber 150 from the first fuel outlet passage 160. The second fuel inlet 120 and the injection port 130 are both in communication with the mixing chamber 150, and the second fuel enters the mixing chamber 150 from the second fuel inlet 120, and the first fuel and the second fuel are mixed in the mixing chamber 150 and then injected from the injection port 130. Of course, the first fuel and the second fuel may be controlled to enter the mixing chamber 150, so that the mixing chamber 150 is filled with a single type of fuel, and then the single fuel is injected according to the requirement.
By providing that the first fuel, the second fuel, or the mixed fuel is all injected from the same injection port 130, the injection port 130 is kept in an injection state continuously when the fuel premix injector is operated, and carbon ash generated by combustion cannot accumulate in the injection port 130, so that the risk of blockage of the injection port 130 is reduced. Compared with the prior art that the gas fuel and the liquid fuel are sprayed from different injection ports 130, the fuel premixing injector can inject mixed fuel, the mixing proportion of the first fuel and the second fuel is flexible and adjustable, and various combustion modes of the engine can be realized, and the field Jing Jiaoduo is used.
Further, the first fuel injection valve 200 includes a first valve body 210, a first control chamber 220, a first liquid inlet passage 230, a second liquid inlet passage 240, a first liquid outlet passage 250, a second liquid outlet passage 260, and a first fuel injection control valve 270. The first control chamber 220 is fixed in the body, the first control chamber 220 is provided with a first liquid inlet 221 and a first liquid outlet 222, the first control chamber 220 is provided with a first elastic member 223, and the first valve body 210 is hermetically inserted into the first control chamber 220 and connected with the first elastic member 223. One end of the first liquid inlet passage 230 communicates with the first fuel inlet 110. When the first fuel is a liquid fuel, a portion of the liquid fuel entering the first fuel inlet 110 flows into the first liquid feed channel 230. When the first fuel is a gaseous fuel, liquid may be delivered to the first liquid inlet channel 230 through the first fuel inlet 110. One end of the second liquid inlet channel 240 is communicated with the other end of the first liquid inlet channel 230 through a first throttle inlet portion, a first throttle inlet hole 231 is arranged on the first throttle inlet portion, and the cross-sectional area of the first throttle inlet hole 231 is smaller than that of the first liquid inlet channel 230. The other end of the second liquid inlet channel 240 is communicated with the first liquid inlet 221, the first throttle inlet 231 can regulate the liquid flow in the second liquid inlet channel 240, and the size of the first throttle inlet 231 is set according to the requirement. One end of the first liquid outlet channel 250 communicates with the first liquid outlet 222, and liquid flows out of the first control chamber 220 through the first liquid outlet channel 250. One end of the second liquid outlet channel 260 is communicated with the first liquid outlet channel 260 through a first outlet throttling part, a first outlet throttling hole 251 is arranged on the first outlet throttling part, and the cross sectional area of the first outlet throttling hole 251 is smaller than that of the first liquid outlet channel 250. The liquid in the first liquid outlet passage 250 flows into the second liquid outlet passage 260 through the first orifice 251, and the first orifice 251 can control the flow rate of the liquid in the second liquid outlet passage 260. The other end of the second liquid outlet passage 260 is connected to a liquid storage device for storing and recycling the liquid flowing out of the first control chamber 220. The first fuel injection control valve 270 is provided in the second liquid outlet passage 260, and the first fuel injection control valve 270 is an automatic valve that can be opened and closed by a controller. The diameter of the first inlet orifice 231 is smaller than the diameter of the first outlet orifice 251.
For ease of understanding, the operation of the first fuel injection valve 200 will now be briefly described:
initial state: liquid continuously enters the first control chamber 220 through the first liquid inlet channel 230 and the second liquid inlet channel 240, the first fuel injection control valve 270 is closed, the liquid in the first control chamber 220 does not flow out, and the force of downward pressing the first valve body 210 in the first control chamber 220 is larger than the upward pressure in the first fuel storage cavity 140, so that the first valve body 210 seals the first fuel outlet channel 160.
If the first fuel outlet passage 160 is to be opened, the controller controls the first fuel injection control valve 270 to be opened, and at this time, since the diameter of the first outlet orifice 251 is larger than that of the first inlet orifice 231, more liquid flows out of the first control chamber 220 than into the first control chamber 220, so that the liquid in the first control chamber 220 is reduced, the first elastic member 223 is compressed due to the air pressure, the first valve body 210 moves in the positive direction of the Z-axis, and the first fuel outlet passage 160 is opened, so that the first fuel enters the mixing chamber 150.
If the first fuel outlet channel 160 needs to be closed, the controller controls the first fuel injection control valve 270 to be closed, and at this time, the liquid in the first control chamber 220 is gradually increased, so that the force of pressing the first valve body 210 downward in the first control chamber 220 is greater than the upward pressure in the first fuel storage chamber 140, and further the first elastic member 223 is extended, so as to push the first valve body 210 to move along the negative direction of the Z axis, and close the first fuel outlet channel 160.
Since the process of injecting the first fuel through the first fuel outlet passage 160 is very fast, which is about 0.5ms, if the flow rate of the liquid flowing out of the first control chamber 220 is controlled by providing the flow rate adjusting valve, it cannot be completed in such a short time, the present application achieves the object of completing the first fuel injection in a short time by providing the first inlet orifice 231 and the first outlet orifice 251, and providing the diameter of the first inlet orifice 231 smaller than that of the first outlet orifice 251 to control the quantity of the liquid in the first control chamber 220. The diameters of the first inlet orifice 231 and the first outlet orifice 251 may be set according to actual needs.
Preferably, with continued reference to fig. 1, a first guide rod 224 may be disposed within the first control chamber 220, the first guide rod 224 extending in the Z-axis direction, one end of the first guide rod 224 being connected to the first valve body 210, the first guide rod 224 being slidably connected to a first guide slot within the first control chamber 220. By providing the first guide rod 224, the movement of the first valve body 210 in the Z-axis direction can be guided, and the reliability of the operation of opening and closing the first fuel outlet passage 160 by the first valve body 210 can be ensured.
Preferably, the first guide rod 224 is cylindrical, and a plurality of first liquid storage rings are arranged on the circumferential surface of the first guide rod 224 at intervals along the length direction of the first guide rod 224. The liquid in the first control chamber 220 can be stored in the first liquid storage ring, and a liquid seal is formed between the liquid in the first liquid storage ring and the wall of the first guide groove, so that the reliability of the operation of the first fuel injection valve 200 is improved.
Preferably, the first elastic member 223 can be sleeved outside the first guide rod 224, the first elastic member 223 is supported by the first guide rod 224, the first elastic member 223 is convenient to install, the first elastic member 223 can be prevented from being bent during compression, and the working reliability of the first elastic member 223 is ensured.
Further, the second fuel injection valve 300 includes a second valve body 310, a second control chamber 320, a third liquid inlet passage 330, a fourth liquid inlet passage 340, a third liquid outlet passage 350, a fourth liquid outlet passage 360, and a second fuel injection valve control valve 370. The second control chamber 320 is fixed in the body, a second liquid inlet 321 and a second liquid outlet 322 are disposed on the second control chamber 320, a second elastic member 323 is disposed in the second control chamber 320, and the second valve body 310 is hermetically disposed in the second control chamber 320 and connected to the second elastic member 323. One end of the third liquid inlet passage 330 communicates with the first fuel inlet 110, and when the first fuel is a liquid fuel, a part of the liquid fuel entering the first fuel inlet 110 flows into the third liquid inlet passage 330. When the first fuel is a gaseous fuel, liquid may be delivered to the third liquid inlet passage 330 through the first fuel inlet 110. One end of the fourth liquid inlet channel 340 is communicated with the other end of the third liquid inlet channel 330 through a second inlet throttle part, a second inlet throttle hole 331 is arranged on the second inlet throttle part, and the cross sectional area of the second inlet throttle hole 331 is smaller than that of the third liquid inlet channel 330. The other end of the fourth liquid inlet channel 340 is communicated with the second liquid inlet 321, the second liquid inlet orifice 331 can adjust the liquid flow of the fourth liquid inlet channel 340, and the size of the second liquid inlet orifice 331 is set according to the requirement. One end of the third liquid outlet channel 350 is communicated with the second liquid outlet 322, and the liquid flows out of the second control chamber 320 through the third liquid outlet channel 350. One end of the fourth liquid outlet channel 360 is communicated with the third liquid outlet channel 350 through a second throttling outlet part, a second throttling outlet hole 351 is arranged on the second throttling outlet part, liquid in the third liquid outlet channel 350 flows into the fourth liquid outlet channel 360 through the second throttling outlet hole 351, and the second throttling outlet hole 351 can control the liquid flow in the fourth liquid outlet channel 360. The other end of the fourth liquid outlet channel 360 is connected to a liquid storage device, which is used for storing the liquid flowing out from the second control chamber 320 and recycling the liquid. The second fuel injection control valve 370 is provided in the fourth liquid outlet passage 360, and the second fuel injection control valve 370 is an automatic valve that can be opened and closed by a controller. The diameter of the second inlet orifice 331 is smaller than the diameter of the second outlet orifice 351.
For ease of understanding, the operation of the second fuel injection valve 300 described above will now be briefly described:
initial state: the liquid continuously enters the second control chamber 320 through the third liquid inlet channel 330 and the fourth liquid inlet channel 340, the second fuel injection control valve 370 is closed, the liquid in the second control chamber 320 does not flow out, and the pressure in the second control chamber 320 is higher than the pressure in the mixing chamber 150, so that the second valve body 310 seals the injection port 130.
If the injection port 130 is to be opened, the controller controls the second fuel injection control valve 370 to be opened, and at this time, since the diameter of the second outlet orifice 351 is larger than that of the second inlet orifice 331, more liquid flows out of the second control chamber 320 than into the second control chamber 320, so that the liquid in the second control chamber 320 is reduced, the second elastic member 323 is compressed by the air pressure, the second valve body 310 is moved in the positive direction of the Z axis, the injection port 130 is opened, and the fuel is injected.
If the injection port 130 needs to be closed, the controller controls the second fuel injection control valve 370 to be closed, and at this time, the liquid in the second control chamber 320 is gradually increased, so that the force of pressing the second valve body 310 downward in the second control chamber 320 is greater than the force of pressing the mixing chamber 150 upward, and further the second elastic member 323 is stretched, so as to push the second valve body 310 to move along the negative direction of the Z axis, and close the injection port 130.
Since the injection process of the fuel from the injection port 130 is very fast, which is about 0.5ms, if the flow rate of the liquid flowing out of the second control chamber 320 is controlled by providing the flow rate adjusting valve, it cannot be completed in such a short time, the present application achieves the goal of completing the fuel injection in a short time by providing the second inlet orifice 331 and the second outlet orifice 351, and providing the diameter of the second inlet orifice 331 smaller than that of the second outlet orifice 351 to control the quantity of the liquid in the second control chamber 320. The diameters of the second inlet orifice 331 and the second outlet orifice 351 may be set according to actual needs.
Preferably, with continued reference to fig. 1, a second guide rod 324 may be disposed in the second control chamber 320, the second guide rod 324 extending in the Z-axis direction, one end of the second guide rod 324 being connected to the second valve body 310, the second guide rod 324 being slidably connected to a second guide groove in the second control chamber 320. By providing the second guide lever 324, the movement of the second valve body 310 in the Z-axis direction can be guided, and the reliability of the operation of opening and closing the injection port 130 by the second valve body 310 can be ensured.
Preferably, the second guiding rod 324 is cylindrical, and a plurality of second liquid storage rings are arranged on the circumferential surface of the second guiding rod 324 at intervals along the length direction of the second guiding rod 324. The liquid in the second control chamber 320 can be stored in the second liquid storage ring, and a liquid seal is formed between the liquid in the second liquid storage ring and the wall of the second guide groove, so that the reliability of the operation of the second fuel injection valve 300 is improved.
Preferably, the second elastic member 323 can be sleeved outside the second guide rod 324, the second elastic member 323 is supported by the second guide rod 324, the second elastic member 323 is convenient to install, bending of the second elastic member 323 during compression can be avoided, and the working reliability of the second elastic member 323 is ensured.
Further, in one embodiment, the first fuel reservoir 140 and the mixing chamber 150 are disposed side-by-side. In another embodiment, the body is a split stack structure with the first fuel reservoir 140 above the mixing chamber 150. In other embodiments, the first fuel storage chamber 140 may be disposed in the second valve body 310, and the first valve body 210 may be disposed in the second valve body 310, so that the compactness of the gas-liquid fuel premixing injector is improved and the size of the gas-liquid fuel premixing injector is reduced compared to the arrangement of the first fuel storage chamber 140 and the mixing chamber 150 side by side.
Preferably, the first fuel outlet passage 160 is provided with a flow control portion provided with a flow control hole having a smaller cross-sectional area than the first fuel outlet passage. By providing a pilot hole, the pressure of the first fuel can be controlled, and in order to ensure that the first fuel in the first fuel storage chamber 140 can smoothly enter the mixing chamber 150, it is necessary to ensure that the pressure in the first fuel storage chamber 140 is greater than the pressure in the mixing chamber 150.
Preferably, in one embodiment, the injection ports 130 are provided in plurality, and the plurality of injection ports 130 are arranged at intervals along the circumferential direction of the body. In another embodiment, the first fuel outlet passages 160 are provided in plurality, and the plurality of first fuel outlet passages 160 are provided at intervals along the circumferential direction of the first fuel reservoir 140. In other embodiments, the injection ports 130 and the first fuel outlet passages 160 are each provided in plural numbers, as needed.
Further, the fuel premix injector described above also includes a first fuel delivery assembly including a first delivery tube 410 and a first fuel pump 420. Wherein the first fuel enters from one end of the first delivery pipe 410 and is output from the other end of the first delivery pipe 410, the other end of the first delivery pipe is communicated with the first fuel inlet 110, and the first fuel pump 430 is disposed on the first delivery pipe 410 for providing power for delivery of the first fuel.
Further, the fuel premix injector further comprises a second fuel delivery assembly comprising a second delivery tube 510, a second fuel surge tank 520, and a second fuel output valve 530. The second fuel enters from one end of the second delivery pipe 510, is output from the other end of the second delivery pipe 510, the other end of the second delivery pipe 510 is communicated with the second fuel inlet 120, the second fuel surge tank 520 is communicated with one end of the second delivery pipe 510, and the second fuel with stability is stored in the second fuel surge tank 520. The second fuel output valve 530 is provided on the second delivery pipe 510, the second fuel output valve 530 being an automatic control valve, and the controller being capable of controlling the opening and closing of the second fuel output valve 530 to control the input of the second fuel.
In the present embodiment, by providing the mixing chamber 150 and communicating the injection port 130 with the mixing chamber 150, various combustion modes of the engine can be realized, which may be, but are not limited to, the following combustion modes (taking the first fuel as a liquid fuel and the second fuel as a gas fuel as an example):
combustion mode one (mainly gaseous fuel combustion): at the later stage of the compression stroke of the engine, the first fuel injection valve 200 is opened to allow the liquid fuel to enter the mixing chamber 150 to form a mixed fuel with the gas in the mixing chamber 150, and then the second fuel injection valve 300 is opened to allow the gas-liquid mixed fuel to enter the combustion chamber of the cylinder as a pilot fuel and to be compression-ignited. After the proper ignition condition is established by the gas-liquid mixed fuel, the secondary injection or the multiple injections of the gas fuel are controlled by the second fuel injection valve 300, so that the gas fuel enters the combustion chamber of the cylinder, and single injection and multiple injections in the main injection period are realized. In this injection mode, there is only one group of injection ports 130 in contact with the cylinder combustion chamber, unlike a conventional dual fuel injector employing two separate injection ports 130. In the whole combustion period, the gas-liquid fuel premixing injector provided by the application always has a single fuel or gas-liquid mixed fuel for flushing the injection port 130, and along with the operation of an engine, compared with a driven dual-fuel injector, the sediment deposited on the injection port 130 is greatly reduced, the risk of blocking the injection port 130 is reduced, and the working reliability of the fuel premixing injector is improved. The requirement for liquid fuel injection is reduced by means of gas-liquid mixed fuel injection. In general, liquid fuel is injected, and only by increasing the injection pressure, the atomization performance of the liquid fuel can be changed. However, the fuel premix injector provided by the application can assist in atomizing liquid fuel, so that the liquid fuel can maintain good atomization performance under lower pressure.
Further, in the first combustion mode, the pressure of the liquid fuel in the first fuel storage chamber 140 is required to be always higher than the pressure of the gas fuel in the mixing chamber 150, for example, the pressure of the liquid fuel in the mixing chamber 150 is higher than the pressure of the gas fuel in the first fuel storage chamber 140 by 50bar, so that when the first fuel injection valve 200 is opened, the liquid fuel can only enter the mixing chamber 150 from the first fuel outlet channel 160 unidirectionally, thereby not only improving lubrication of the coupling, but also preventing gas channeling of the coupling.
Combustion mode two (with pilot): the gas-liquid mixed fuel is pre-sprayed firstly, and then the gas-liquid mixed fuel is subjected to multiple main spraying. In this combustion mode, both gaseous and liquid fuels participate in combustion.
Combustion mode three (gas medium does not participate in combustion): the added gas fuel is nitrogen, and the gas fuel does not participate in combustion and only plays a role in assisting the atomization of the liquid fuel.
Combustion mode four (no pilot): by adjusting the ratio of the gas fuel and the liquid fuel, the mixed gas-liquid fuel is always injected, so that the engine can realize gas-liquid fuel combustion under the dual-fuel supply, and the engine always keeps high-efficiency operation.
The fuel premixing injector provided by the invention has fewer connecting pipelines, does not need higher injection pressure, improves the reliability of the system, and has lower cost.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (9)
1. A fuel premix injector, comprising:
the fuel injection device comprises a body, wherein a first fuel inlet (110), a second fuel inlet (120) and an injection port (130) are formed in the body, a first fuel storage cavity (140) and a mixing cavity (150) are formed in the body, the first fuel inlet (110) is communicated with the first fuel storage cavity (140), the second fuel inlet (120) and the injection port (130) are communicated with the mixing cavity (150), and a first fuel outlet channel (160) communicated with the mixing cavity (150) is formed in the first fuel storage cavity (140);
a first fuel injection valve (200) disposed within the first fuel reservoir (140), the first fuel injection valve (200) being configured to control opening and closing of the first fuel outlet passage (160);
a second fuel injection valve (300) disposed within the mixing chamber (150), the second fuel injection valve (300) being configured to control opening and closing of the injection port (130);
the first fuel injection valve (200) includes:
a first valve body (210);
the first control chamber (220) is fixed in the body, a first liquid inlet (221) and a first liquid outlet (222) are formed in the first control chamber (220), a first elastic piece (223) is arranged in the first control chamber (220), the first valve body (210) is hermetically penetrated in the first control chamber (220) and connected with the first elastic piece (223), and the first valve body (210) can move along the Z-axis direction to block or open the first fuel outlet channel (160);
a first liquid inlet channel (230), one end of the first liquid inlet channel (230) is communicated with the first fuel inlet (110);
a second liquid inlet channel (240), wherein one end of the second liquid inlet channel (240) is communicated with the other end of the first liquid inlet channel (230) through a first throttle inlet part, a first throttle inlet hole (231) is arranged on the first throttle inlet part, the cross section area of the first throttle inlet hole (231) is smaller than that of the first liquid inlet channel (230), and the other end of the second liquid inlet channel (240) is communicated with the first liquid inlet (221);
a first liquid outlet channel (250), wherein one end of the first liquid outlet channel (250) is communicated with the first liquid outlet (222);
a second liquid outlet channel (260), wherein one end of the second liquid outlet channel (260) is communicated with the other end of the first liquid outlet channel (250) through a first throttling outlet part, a first throttling outlet hole (251) is arranged on the first throttling outlet part, and the cross section area of the first throttling outlet hole (251) is smaller than that of the first liquid outlet channel (250);
a first fuel injection control valve (270) provided in the second liquid outlet passage (260);
the diameter of the first inlet orifice (231) is smaller than the diameter of the first outlet orifice (251).
2. The fuel premix injector of claim 1 wherein a first pilot rod (224) is disposed within the first control chamber (220), the first pilot rod (224) extending in the Z-axis direction, one end of the first pilot rod (224) being connected to the first valve body (210), the first pilot rod (224) being slidably connected to a first pilot groove within the first control chamber (220).
3. The fuel premix injector of claim 2 wherein the first pilot rod (224) is cylindrical, and a plurality of first reservoir rings are provided on a circumferential surface of the first pilot rod (224).
4. The fuel premix injector of claim 1 wherein the second fuel injection valve (300) comprises:
a second valve body (310);
the second control chamber (320) is fixed in the body, a second liquid inlet (321) and a second liquid outlet (322) are formed in the second control chamber (320), a second elastic piece (323) is arranged in the second control chamber (320), the second valve body (310) is hermetically penetrated in the second control chamber (320) and connected with the second elastic piece (323), and the second valve body (310) can move along the Z-axis direction to block or open the jet orifice (130);
a third liquid inlet channel (330), one end of the third liquid inlet channel (330) is communicated with the first fuel inlet (110);
a fourth liquid inlet channel (340), wherein one end of the fourth liquid inlet channel (340) is communicated with the other end of the third liquid inlet channel (330) through a second throttle inlet part, a second throttle inlet hole (331) is arranged on the second throttle inlet part, the cross section area of the second throttle inlet hole (331) is smaller than that of the third liquid inlet channel (330), and the other end of the fourth liquid inlet channel (340) is communicated with the second liquid inlet (321);
a third liquid outlet channel (350), wherein one end of the third liquid outlet channel (350) is communicated with the second liquid outlet (322);
a fourth liquid outlet channel (360), wherein one end of the fourth liquid outlet channel (360) is communicated with the other end of the third liquid outlet channel (350) through a second throttling outlet part, a second throttling outlet hole (351) is arranged on the second throttling outlet part, and the cross section area of the second throttling outlet hole (351) is smaller than that of the third liquid outlet channel (350);
a second fuel injection control valve (370) provided on the fourth liquid outlet passage (360);
the diameter of the second inlet orifice (331) is smaller than the diameter of the second outlet orifice (351).
5. The fuel premix injector of claim 4 wherein a second pilot rod (324) is disposed within the second control chamber (320), the second pilot rod (324) extending in the Z-axis direction, one end of the second pilot rod (324) being connected to the second valve body (310), the second pilot rod (324) being slidably connected to a second pilot slot within the second control chamber (320).
6. The fuel premix injector of claim 5 wherein the second pilot stem (324) is cylindrical, and a plurality of second reservoir rings are provided on a circumferential surface of the second pilot stem (324).
7. The fuel premix injector of claim 4 wherein the first fuel reservoir (140) is disposed within the second valve body (310);
or, the body is of a split superposition type structure.
8. The fuel premix injector of any of claims 1-7 wherein a flow control portion is provided on the first fuel outlet passage (160), and a flow control orifice is provided on the flow control portion, the flow control orifice having a cross-sectional area that is less than a cross-sectional area of the first fuel outlet passage (160).
9. The fuel premix injector of any of claims 1-7, characterized in that a plurality of injection ports (130) are provided, a plurality of the injection ports (130) being arranged at intervals along the circumferential direction of the body; and/or
The first fuel outlet passages (160) are provided in plurality, and the plurality of first fuel outlet passages (160) are arranged at intervals along the circumferential direction of the first fuel storage chamber (140).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210785396.XA CN115095459B (en) | 2022-07-04 | 2022-07-04 | Fuel premixing injector |
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| CN202210785396.XA CN115095459B (en) | 2022-07-04 | 2022-07-04 | Fuel premixing injector |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000249015A (en) * | 1999-02-26 | 2000-09-12 | Nissan Motor Co Ltd | Fuel injection device for gasoline self-ignition internal combustion engine |
| JP2010168911A (en) * | 2009-01-20 | 2010-08-05 | Denso Corp | Fuel injection valve |
| 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 |
| CN103987952A (en) * | 2011-10-24 | 2014-08-13 | 卡特彼勒公司 | Dual fuel injector with hydraulic lock seal and liquid leak purge strategy |
| CN106762276A (en) * | 2017-01-05 | 2017-05-31 | 江苏大学 | A kind of new dual fuel injector of cavitation prevention and common rail fuel system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB201309124D0 (en) * | 2013-05-21 | 2013-07-03 | Delphi Tech Holding Sarl | Fuel Injector |
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2022
- 2022-07-04 CN CN202210785396.XA patent/CN115095459B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000249015A (en) * | 1999-02-26 | 2000-09-12 | Nissan Motor Co Ltd | Fuel injection device for gasoline self-ignition internal combustion engine |
| 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 |
| JP2010168911A (en) * | 2009-01-20 | 2010-08-05 | Denso Corp | Fuel injection valve |
| CN103987952A (en) * | 2011-10-24 | 2014-08-13 | 卡特彼勒公司 | Dual fuel injector with hydraulic lock seal and liquid leak purge strategy |
| CN106762276A (en) * | 2017-01-05 | 2017-05-31 | 江苏大学 | A kind of new dual fuel injector of cavitation prevention and common rail fuel system |
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| CN115095459A (en) | 2022-09-23 |
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