CN112594105A - High-pressure common rail oil sprayer with auxiliary fuel oil inlet hole - Google Patents
High-pressure common rail oil sprayer with auxiliary fuel oil inlet hole Download PDFInfo
- Publication number
- CN112594105A CN112594105A CN202110146541.5A CN202110146541A CN112594105A CN 112594105 A CN112594105 A CN 112594105A CN 202110146541 A CN202110146541 A CN 202110146541A CN 112594105 A CN112594105 A CN 112594105A
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- common rail
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- 239000003921 oil Substances 0.000 title claims abstract description 39
- 239000000295 fuel oil Substances 0.000 title claims abstract description 35
- 238000002347 injection Methods 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 19
- 239000000446 fuel Substances 0.000 claims description 52
- 238000007906 compression Methods 0.000 claims description 9
- 230000006835 compression Effects 0.000 claims description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 30
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
- F02M55/025—Common rails
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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
- 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
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
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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
- F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
- F02M65/003—Measuring variation of fuel pressure in high pressure line
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention relates to the field of common rail oil injectors, in particular to a high-pressure common rail oil injector with an auxiliary fuel oil inlet hole, which comprises an engine body, wherein an electromagnetic valve and a needle valve are arranged in the engine body, a high-pressure fuel oil channel is arranged on the side wall of the engine body, an accommodating cavity for accommodating the needle valve is arranged at the end part of the engine body, an oil injection hole is arranged at the end part of the accommodating cavity, the high-pressure fuel oil channel is communicated with the accommodating cavity, and a control cavity is arranged at the rear part of the needle valve.
Description
Technical Field
The invention relates to the field of common rail oil injectors, in particular to a high-pressure common rail oil injector with an auxiliary fuel oil inlet hole.
Background
The various engines on the market, such as diesel generators, gasoline engines, natural gas engines, etc., produce various components of combustion exhaust, which may be gaseous, such as nitrogen oxides (NOx). With the increasing emphasis on environmental pollution issues, emission standards for engines of different forms and sizes, especially nitrogen oxides (NOx), have become more stringent.
The fuel injector is the most critical and complex part in the common rail system and is also the most difficult part in design and process. The ECU injects fuel in the high-pressure fuel rail into a combustion chamber with optimal fuel injection timing, fuel injection quantity and fuel injection rate by controlling the opening and closing of the electromagnetic valve; thus, effectively improving the relevant characteristics of the fuel injector can reduce the emission of poor engines. The fundamental reasons for the exhaust gases from poor combustion are:
A. the fuel injector is quickly opened, so that the fuel is insufficiently combusted or even detonated;
B. the fuel injector is slowly closed, atomization of fuel oil becomes poor, and waste gas is easily generated.
Disclosure of Invention
The invention aims to provide a high-pressure common rail oil injector with an auxiliary fuel oil inlet hole, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a high-pressure common rail oil injector with an auxiliary fuel inlet hole comprises an engine body, wherein an electromagnetic valve and a needle valve are arranged in the engine body, a high-pressure fuel oil channel is arranged on the side wall of the engine body, an accommodating cavity for accommodating the needle valve is arranged at the end part of the engine body, an oil injection hole is arranged at the end part of the accommodating cavity, the high-pressure fuel oil channel is communicated with the accommodating cavity, a control cavity is arranged at the rear part of the needle valve, the electromagnetic valve controls the pressure of high-pressure fuel oil in the control cavity, when the electromagnetic valve is opened, the pressure in the control cavity is reduced, the needle valve moves towards the engine body and loses the support on the oil injection hole, and the; when the electromagnetic valve is closed, the pressure in the control cavity is increased, the end part of the needle valve is abutted against the oil injection hole, and the fuel oil in the high-pressure fuel oil channel cannot be sprayed out of the oil injection hole;
the high-pressure fuel oil channel is divided into a first branch, the electromagnetic valve is arranged between the first branch and the control cavity,
the high-pressure fuel oil channel is divided into a second branch, the electromagnetic valve is also arranged between the second branch and the control cavity, and the first branch and the second branch enter the control cavity through a common channel;
when the electromagnetic valve is opened, fuel in the first branch and the second branch can enter the control cavity without obstruction, when the electromagnetic valve is closed, the fuel in the first branch and the second branch is led out through the electromagnetic valve, and the pressure of the fuel in the control cavity is reduced.
As a further scheme of the invention: the first branch and the second branch are arranged side by side, and under the action of the electromagnetic valve, fuel oil in the first branch and the fuel oil in the second branch can jointly enter or jointly discharge the control cavity.
As a further scheme of the invention: the tip of settling the chamber is the throat, the nozzle opening sets up in the lowest of throat, the tip of needle valve with the throat looks adaptation.
As a further scheme of the invention: one end of the needle valve in the placement cavity is an end face, a compression spring is arranged between the end face and the control cavity, and the compression spring gives a force for the needle valve to compress the oil injection hole.
As a further scheme of the invention: and the rear end of the control cavity is provided with a pressure sensor.
As a further scheme of the invention: one end of a high-pressure fuel oil channel in the machine body is positioned in the middle of the mounting cavity.
As a further scheme of the invention: and a confluence cavity is arranged at the intersection of the mounting cavity and the high-pressure fuel passage.
As a further scheme of the invention: the needle valve is provided with lower step portion, and when the needle valve supported tightly when the nozzle opening, lower step portion supported tightly on settling the inner wall in chamber, prevented the fuel toward the nozzle opening circulation, moved and lost the supporting tightly to the nozzle opening when the needle valve moved in to the organism, lower step portion got into in the convergent flow chamber to lower step portion forms the clearance with settling the inner wall in chamber, and the fuel toward the nozzle opening circulation and from the nozzle opening blowout.
As a further scheme of the invention: the high-pressure fuel in the confluence cavity gives the force for the needle valve to move in the machine body through the upper step part.
Compared with the prior art, the invention has the beneficial effects that:
the high-pressure fuel oil channel of the device is divided into a first branch, the electromagnetic valve is arranged between the first branch and the control cavity, the high-pressure fuel oil channel is divided into a second branch, the electromagnetic valve is also arranged between the second branch and the control cavity, the first branch and the second branch enter the control cavity through a common channel, and the following effects are realized through the auxiliary second branch: a. slowly opening the oil injector; when the electromagnetic valve is electrified and opened, the electromagnetic valve drains oil, fuel oil in the first branch, the second branch and the control cavity is decompressed and discharged by the electromagnetic valve, and due to the existence of the auxiliary second branch, when the electromagnetic valve is initially opened, the pressure in the control cavity has a certain transition period until the pressure balance is kept, the transition period can effectively realize the slow opening of the needle valve, the effective combustion of the fuel oil and the generation of nitrogen oxides (NOx) are greatly reduced; b. quickly closing the oil injector; when the electromagnetic valve is closed in a power-off mode, the electromagnetic valve is closed to drain oil, the first branch and the second branch synchronously pressurize the control cavity, the pressure of the control cavity and the pressure of the compression spring are rapidly greater than the pressure of the confluence cavity, the needle valve tightly pushes the oil injection hole, and emission of nitrogen oxides (NOx) caused by poor combustion is effectively reduced; the effect that the needle valve is slowly opened and quickly closed is achieved through the second branch, so that fuel oil is more sufficiently combusted, and exhaust emission is greatly reduced.
The first branch and the second branch of the device are arranged side by side, the first branch and the second branch which are arranged side by side do not have precedence, effective oil inlet of each branch is guaranteed, the two branches are arranged, the oil injector can still continue to operate under the condition that one branch is unstable or even fails, and the specific expression form of the first branch and the second branch on the oil injector is a small hole in actual production.
And thirdly, a pressure sensor is arranged at the rear end of the control cavity of the device, real-time data transmission is carried out through the pressure sensor, instantaneous data in the control cavity of the oil sprayer are found in time, whether the oil sprayer is damaged or not or whether maintenance is needed is detected, and the service life and the service quality of a product are ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of a portion of the oil circuit of the present invention;
FIG. 3 is a schematic diagram showing the experimental results of the present invention.
In the figure: 1-body; 2-a high-pressure fuel channel; 3-needle valve; 31-lower step portion; 32-an upper step; 4-oil spray holes; 5-a placement cavity; 51-necking; 52-a manifold chamber; 6-compression spring; 7-a control chamber; 8-a pressure sensor; 9-an electromagnetic valve; a-common channel; b-a second branch; z-first branch.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
Referring to fig. 1-3, in the embodiment of the present invention, a high pressure common rail injector with an auxiliary fuel inlet hole includes a body 1, a solenoid valve 9 and a needle valve 3 are disposed in the body 1, a high pressure fuel channel 2 is disposed on a side wall of the body 1, an installation cavity 5 for installing the needle valve 3 is disposed at an end of the body 1, a fuel injection hole 4 is disposed at an end of the installation cavity 5, the high pressure fuel channel 2 is communicated with the installation cavity 5, a control cavity 7 is disposed at a rear portion of the needle valve 3, the solenoid valve 9 controls a pressure of high pressure fuel in the control cavity 7, when the solenoid valve 9 is opened, the pressure in the control cavity 7 is reduced, the needle valve 3 moves into the body 1 and loses its abutment against the fuel injection hole 4, and fuel in the high pressure fuel channel 2 can be injected from the fuel injection hole 4; when the electromagnetic valve 9 is closed, the pressure in the control cavity 7 is increased, the end part of the needle valve 3 is tightly propped against the oil injection hole 4, and the fuel oil in the high-pressure fuel oil channel 2 cannot be sprayed out from the oil injection hole 4; the high-pressure fuel oil channel 2 is divided into a first branch Z, the electromagnetic valve 9 is arranged between the first branch Z and the control cavity 7, the high-pressure fuel oil channel 2 is divided into a second branch B, the electromagnetic valve 9 is also arranged between the second branch B and the control cavity 7, and the first branch Z and the second branch B enter the control cavity 7 through a common channel A; when the solenoid valve 9 is opened, the fuel in the first branch Z and the second branch B can enter the control chamber 7 without obstruction, and when the solenoid valve 9 is closed, the fuel in the first branch Z and the second branch B is led out through the solenoid valve 9, and the pressure of the fuel in the control chamber 7 is reduced.
The following effects are achieved by the auxiliary second branch B: a. slowly opening the oil injector; when the electromagnetic valve 9 is electrified and opened, oil is drained from the electromagnetic valve, fuel oil in the first branch Z, the second branch B and the control cavity 7 is discharged in a pressure relief mode through the electromagnetic valve 9, due to the existence of the auxiliary second branch B, when the electromagnetic valve 9 is initially opened, the pressure in the control cavity 7 has a certain transition period until the pressure is kept balanced, the transition period can effectively realize the slow opening of the needle valve 3, the effective combustion of the fuel oil is realized, and the generation of nitrogen oxides (NOx) is greatly reduced; b. quickly closing the oil injector; when the electromagnetic valve 9 is closed in a power-off mode, the electromagnetic valve 9 is closed to drain oil, the first branch Z and the second branch B synchronously pressurize the control cavity 7, the pressure of the control cavity 7 plus the pressure of the compression spring 6 is rapidly greater than the pressure of the confluence cavity 52, the needle valve 3 tightly pushes the oil injection hole 4, and the emission of nitrogen oxides (NOx) caused by poor combustion is effectively reduced; the effect that the needle valve 3 is slowly opened and quickly closed is realized through the second branch B, so that the fuel oil is more fully combusted, and the exhaust emission is greatly reduced.
The first branch Z and the second branch B are arranged side by side, and under the action of the electromagnetic valve 9, fuel in the first branch Z and the second branch B can jointly enter or jointly discharge from the control cavity 7. The first branch Z and the second branch B which are arranged side by side do not have precedence, effective oil feeding of each branch is guaranteed, the two branches are arranged, the oil injector can still continue to operate under the condition that one branch is unstable or even fails, and the specific representation form of the first branch Z and the second branch B on the oil injector in actual production is a small hole.
The tip of settling chamber 5 is throat 51, nozzle opening 4 sets up the lowest of throat 51, the tip of needle valve 3 with throat 51 looks adaptation, through throat 51, the leakproofness of guarantee needle valve 3 to nozzle opening 4.
The one end that needle valve 3 is located settling chamber 5 is the terminal surface, is provided with compression spring 6 between this terminal surface and the control chamber 5, and compression spring 6 gives needle valve 3 and compresses tightly the power of nozzle opening 4 carries out the impact force of needle valve 3 through compression spring 6 and slows down, makes the rigid impact of needle valve 3 convert flexible impact into, ensures the stability of needle valve 3.
The rear end of the control cavity 7 is provided with a pressure sensor 8, real-time data transmission is carried out through the pressure sensor 8, instantaneous data in the control cavity 7 of the oil sprayer are found in time, whether the instantaneous data are damaged or not or whether maintenance is needed is detected, and the service life and the service quality of a product are guaranteed.
One end of the high-pressure fuel passage 2 in the machine body 1 is positioned in the middle of the mounting cavity 5, so that the needle valve 3 has a larger operation space, a confluence cavity 52 is arranged at the intersection of the mounting cavity 5 and the high-pressure fuel passage 2, the confluence cavity 52 is used for mounting high-pressure fuel, and the movement of the needle valve 3 is actually controlled by the pressure difference between the confluence cavity 52 and the control cavity 7.
A confluence chamber 52 is arranged at the junction of the setting chamber 5 and the high-pressure fuel passage 2.
Be provided with lower step portion 31 on needle valve 3, support tightly when needle valve 3 during nozzle opening 4, lower step portion 31 supports tightly on settling the inner wall of chamber 5, prevents the fuel and toward nozzle opening 4 circulation, moves and loses the support tightly to nozzle opening 4 in needle valve 3 moves to organism 1, lower step portion 31 gets into in the chamber 52 that converges to lower step portion 31 and the inner wall of settling chamber 5 form the clearance, and the fuel toward nozzle opening 4 circulation and from nozzle opening 4 blowout.
The needle valve 3 is provided with an upper step part 32, the upper step part 32 is arranged in the converging cavity 52, the upper step part 32 is abutted against the inner wall of the mounting cavity 5 and prevents fuel from entering the control cavity 7 at any time, and high-pressure fuel in the converging cavity 52 gives the force which is applied to the needle valve 3 to move towards the machine body 1 through the upper step part 32.
The control of the opening of the needle valve 3 is performed by the upper step portion 32, and in the actual production, the fitting precision between the lower step portion 31 and the mounting chamber 5 is not required, and the operability is stronger by performing appropriate adjustment according to the actual production working environment.
As shown in fig. 3, the solid line is an aging diagram of the conventional fuel injector, and the dotted line is an aging diagram of the dual-branch fuel injector;
without considering the reaction rate of the solenoid valve, as shown in fig. 3, the rising curvature of the injector of the present invention is significantly lower than that of the conventional injector until the equilibrium state is reached, and the falling curvature of the injector of the present invention is significantly higher than that of the conventional injector until the injection hole is completely closed, and by such improvement, the emission of Nox and hydrocarbons is greatly improved.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. The utility model provides a high pressure common rail injector with auxiliary fuel inlet port, includes organism (1), its characterized in that: an electromagnetic valve (9) and a needle valve (3) are arranged in the machine body (1), a high-pressure fuel oil channel (2) is arranged on the side wall of the machine body (1), an accommodating cavity (5) for accommodating the needle valve (3) is formed in the end portion of the machine body (1), an oil injection hole (4) is formed in the end portion of the accommodating cavity (5), the high-pressure fuel oil channel (2) is communicated with the accommodating cavity (5), and a control cavity (7) is formed in the rear portion of the needle valve (3); the high-pressure fuel oil channel (2) is divided into a first branch (Z), the electromagnetic valve (9) is arranged between the first branch (Z) and the control cavity (7), the high-pressure fuel oil channel (2) is divided into a second branch (B), the electromagnetic valve (9) is also arranged between the second branch (B) and the control cavity (7), and the first branch (Z) and the second branch (B) enter the control cavity (7) through the common channel (A).
2. A high-pressure common rail injector with an auxiliary fuel inlet hole according to claim 1, characterized in that: the first branch (Z) and the second branch (B) are arranged side by side.
3. A high-pressure common rail injector with an auxiliary fuel inlet hole according to claim 1, characterized in that: the end part of the mounting cavity (5) is a necking opening (51), the oil injection hole (4) is arranged at the lowest part of the necking opening (51), and the end part of the needle valve (3) is matched with the necking opening (51).
4. A high-pressure common rail injector with an auxiliary fuel inlet port according to claim 1, 2 or 3, characterized in that: one end, located in the arranging cavity (5), of the needle valve (3) is an end face, and a compression spring (6) is arranged between the end face and the control cavity (5).
5. The high-pressure common rail injector with an auxiliary fuel inlet hole according to claim 4, characterized in that: and a pressure sensor (8) is arranged at the rear end of the control cavity (7).
6. A high-pressure common rail injector with an auxiliary fuel inlet hole according to claim 1, characterized in that: one end of a high-pressure fuel oil channel (2) in the engine body (1) is positioned in the middle of the mounting cavity (5).
7. The high-pressure common rail injector with an auxiliary fuel inlet hole according to claim 6, characterized in that: and a confluence cavity (52) is arranged at the intersection of the arrangement cavity (5) and the high-pressure fuel channel (2).
8. The high-pressure common rail injector with an auxiliary fuel inlet hole according to claim 7, characterized in that: the needle valve (3) is provided with a lower step part (31).
9. A high-pressure common rail injector with an auxiliary fuel inlet hole according to claim 8, characterized in that: an upper step part (32) is arranged on the needle valve (3), the upper step part (32) is arranged in the confluence cavity (52), and the upper step part (32) is abutted against the inner wall of the mounting cavity (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110146541.5A CN112594105A (en) | 2021-02-03 | 2021-02-03 | High-pressure common rail oil sprayer with auxiliary fuel oil inlet hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110146541.5A CN112594105A (en) | 2021-02-03 | 2021-02-03 | High-pressure common rail oil sprayer with auxiliary fuel oil inlet hole |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112594105A true CN112594105A (en) | 2021-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110146541.5A Pending CN112594105A (en) | 2021-02-03 | 2021-02-03 | High-pressure common rail oil sprayer with auxiliary fuel oil inlet hole |
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2021
- 2021-02-03 CN CN202110146541.5A patent/CN112594105A/en active Pending
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| CN105484921A (en) * | 2015-12-11 | 2016-04-13 | 中国北方发动机研究所(天津) | Control valve and control body of oil-inlet-quantity-variable hole-type high pressure common rail oil sprayer |
| CN105971793A (en) * | 2016-05-31 | 2016-09-28 | 清华大学 | Electrically controlled high-pressure fuel injector for realizing quick fuel cut |
| CN107503870A (en) * | 2017-10-10 | 2017-12-22 | 中国第汽车股份有限公司 | Fuel Feeding System for Diesel Engine is united |
| CN108798956A (en) * | 2018-06-13 | 2018-11-13 | 中国北方发动机研究所(天津) | A kind of common-rail injector control oil channel structures |
| CN109184986A (en) * | 2018-07-26 | 2019-01-11 | 哈尔滨工程大学 | The variable pressure accumulation type electric control fuel oil jet system of fuel injection characteristic |
| CN214170706U (en) * | 2021-02-03 | 2021-09-10 | 浙江能工精密制造股份有限公司 | High-pressure common rail oil sprayer with auxiliary fuel oil inlet hole |
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