CN111365152B - Engine and oil injector thereof - Google Patents
Engine and oil injector thereof Download PDFInfo
- Publication number
- CN111365152B CN111365152B CN201811604778.8A CN201811604778A CN111365152B CN 111365152 B CN111365152 B CN 111365152B CN 201811604778 A CN201811604778 A CN 201811604778A CN 111365152 B CN111365152 B CN 111365152B
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- Prior art keywords
- oil
- fuel
- engine
- oil inlet
- rotating shaft
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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
- F02M51/00—Fuel-injection apparatus characterised by being operated electrically
- F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
- F02M51/061—Injectors peculiar thereto with means directly operating the valve needle 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
- 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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- 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 discloses an engine and an oil sprayer thereof, wherein the oil sprayer comprises an oil inlet part and an oil spraying part, the oil inlet part is provided with an oil inlet, the oil spraying part is provided with an oil spraying port, and the oil inlet part is communicated with the oil spraying part so that fuel oil can enter the oil spraying part from the oil inlet part; the oil inlet portion and the oil injection portion are arranged in a split mode, the oil inlet portion is fixed to a cylinder cover of an engine, the rotating portion is used for driving the oil injection portion to rotate and comprises a rotating shaft and a stator and rotor assembly, the stator and rotor assembly is used for driving the rotating shaft to rotate, and the rotating shaft is fixedly connected with the oil injection portion. Because the oil spout portion can rotate under the drive of rotation portion to make the fuel in this oil spout portion rotate thereupon, when spouting to the engine cylinder from the nozzle, this part fuel continues to rotate because of inertia, thereby makes fuel and air have relative motion, improves the homogeneity that the two mixes in the cylinder, and then improves the combustion efficiency of fuel, reduces the engine and leads to the pollutant emission because the burning is incomplete.
Description
Technical Field
The invention relates to the technical field of engines, in particular to an engine and an oil sprayer thereof.
Background
The engine fuel injector is used for atomizing fuel and then introducing the atomized fuel into a cylinder of an engine so as to be mixed with air for combustion. The existing diesel engine fuel injector is mainly a multi-hole fuel injector, the injection pressure is generally 1600 bar-2000 bar, and the number of holes is generally 6-8.
The fuel and the engine intake air are mixed and combusted in the cylinder, when the fuel is not combusted sufficiently, the fuel utilization rate can be reduced, pollutants can be discharged, and the fuel combustion degree can be improved by improving the mixing uniformity of the fuel and the engine intake air, so that the fuel utilization rate is improved, and the pollutant emission is reduced.
In view of this, an urgent need exists in the art for an injector that can improve the uniformity of mixing between fuel and intake air of an engine.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a fuel injector of an engine, which comprises an oil inlet part and a fuel injection part, wherein the oil inlet part is provided with an oil inlet, the fuel injection part is provided with a fuel injection port, and the oil inlet part is communicated with the fuel injection part so that fuel can enter the fuel injection part from the oil inlet part;
the oil feed portion with oil spout portion components of a whole that can function independently sets up, just oil feed portion is fixed in the cylinder cap of engine, still including being used for the drive oil spout portion pivoted rotation portion, rotation portion includes pivot and stator rotor subassembly, stator rotor subassembly is used for the drive the pivot rotates, the pivot with oil spout portion links firmly.
According to the invention, the fuel injection part can rotate under the driving of the rotating part, so that the fuel in the fuel injection part rotates along with the fuel, when the fuel is injected to the cylinder of the engine from the fuel injection port, the part of the fuel continues to rotate due to inertia, so that the fuel and the air have relative motion, the uniformity of mixing of the fuel and the air in the cylinder is improved, the combustion efficiency of the fuel is further improved, and the risk of pollutant emission of the engine due to incomplete combustion is reduced.
Simultaneously, oil feed portion sets up with oil spout portion components of a whole that can function independently, and oil feed portion is fixed in the cylinder cap, consequently is in quiescent condition all the time, and simultaneously, oil spout portion is connected with the pivot, can rotate along with the pivot, and this in-process, oil spout portion rotates for oil feed portion to improve the homogeneity of fuel and air mixture in the cylinder. Meanwhile, the oil inlet part is always in a static state, so that the high-pressure oil pump can conveniently input high-pressure fuel oil into the oil inlet part through the oil inlet, and the connecting structure of the oil inlet and the high-pressure oil pump is not required to be changed.
Optionally, the oil inlet portion has a first housing, and the stator-rotor assembly is disposed in an inner cavity of the first housing.
Optionally, the rotation direction of the rotating shaft is opposite to the airflow direction of the air inlet of the engine provided with the helical air inlet.
Optionally, the inside cavity that has of pivot, and its one end stretches into oil feed portion, the other end stretches into oil spout portion, so that oil feed portion with oil spout portion passes through the pivot intercommunication.
Optionally, the side wall thickness of the cavity is greater than 2 mm.
Optionally, the rotating shaft is fixed to a second housing of the oil injection part, and the oil injection part is symmetrical with respect to the rotating shaft.
Optionally, a needle valve and an electromagnetic coil are arranged inside a second shell of the oil injection part, and the needle valve is connected with a return spring;
when the electromagnetic coil is powered on, the needle valve is driven to move so as to open the oil injection port, and when the electromagnetic coil is powered off, the return spring drives the needle valve to move so as to close the oil injection port.
Optionally, a guide part is arranged in the second shell, a guide hole is formed in the guide part, and the needle valve penetrates through the guide hole and can axially move along the guide hole to open or close the oil injection port.
In addition, the invention also provides an engine which comprises a cylinder and an oil injector, wherein the oil injector is used for injecting fuel oil into the cylinder, and the oil injector is the oil injector.
Drawings
FIG. 1 is a schematic diagram of a fuel injector provided in accordance with the present invention in one embodiment.
In fig. 1:
1, an oil inlet part, 11 a first shell and 12 an oil inlet;
2, an oil injection part, 21 a second shell, 22 an oil injection port, 23 a spring, 24 needle valves and 25 a guide part;
3 rotating shaft, 31 stator and rotor assembly.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a fuel injector according to an embodiment of the present invention.
In one embodiment, the present invention provides a fuel injector for an engine for atomizing fuel into a cylinder of the engine for combustion with air. Specifically, as shown in fig. 1, the fuel injector includes an oil inlet portion 1 and a fuel injection portion 2, wherein the oil inlet portion 1 is provided with an oil inlet 12, a high-pressure fuel pump delivers high-pressure fuel into the oil inlet portion 1 through the oil inlet 12, and the oil inlet portion 1 is communicated with the fuel injection portion 2, so that the fuel can enter the fuel injection portion 2 from the oil inlet portion 1, and meanwhile, the fuel injection portion 2 is provided with a fuel injection port 22, and the fuel injection port 22 is communicated with a cylinder of an engine, so that the atomized fuel is introduced into the cylinder.
Further, as shown in fig. 1, the fuel injector further includes a rotating portion for driving the fuel injection portion 2 to rotate.
In the invention, the oil injection part 2 can rotate under the driving of the rotating part, so that the fuel oil in the oil injection part 2 rotates along with the oil injection part, when the fuel oil is sprayed out of the oil injection port 22 to an engine cylinder, the part of the fuel oil continues to rotate due to inertia, so that the fuel oil and air have relative motion, the mixing uniformity of the fuel oil and the air in the cylinder is further improved, the combustion efficiency is improved, and the risk of pollutant emission of the engine due to incomplete combustion is reduced.
Specifically, as shown in the embodiment shown in fig. 1, the oil inlet portion 1 and the oil spraying portion 2 are separately arranged, the first housing 11 of the oil inlet portion 1 is fixed to a cylinder head of an engine cylinder, meanwhile, the oil spraying portion 2 is connected with a rotating shaft 3, the rotating shaft 3 is connected with a driving member, and can be driven by the driving member to rotate, so as to drive the oil spraying portion 2 to rotate. Therefore, the rotating shaft 3 and the driving member in this embodiment are the rotating parts.
In this embodiment, oil feed portion 1 and the components of a whole that can function independently setting of oil spout portion 2, and oil feed portion 1 is fixed in the cylinder cap, is in quiescent condition all the time, and simultaneously, oil spout portion 2 is connected with pivot 3, can rotate along with pivot 3, and in this process, oil spout portion 2 rotates for oil feed portion 1 to improve the homogeneity of fuel and air mixture in the cylinder. Meanwhile, the oil inlet part 1 is always in a static state, so that the high-pressure oil pump can conveniently input high-pressure fuel oil into the oil inlet part 1 through the oil inlet 12 without changing a connecting structure of the oil inlet 12 and the high-pressure oil pump.
It should be noted that, the above-mentioned rotating portion is not necessarily realized by arranging the rotating shaft 3 on the oil injection portion 2, and may also be realized by other structures commonly used in the art, for example, a rotating disc may be arranged at the bottom of the oil injection portion 2, and the rotating disc is provided with a through hole for introducing the fuel injected from the oil injection port 22 into the cylinder, and the rotating disc can drive the oil injection portion 2 to rotate. However, in this embodiment, the engine space occupied by the rotary shaft 3 is small, and the arrangement is convenient.
More specifically, the rotation principle of the rotating shaft 3 is similar to that of a rotating shaft of a motor, and in the embodiment shown in fig. 1, the rotation of the rotating shaft 3 is driven by the stator and rotor assembly 31, and therefore, the stator and rotor assembly 31 is a driving member of the rotating shaft 3. The rotation principle and the specific structure of the stator and rotor assembly 31 for driving the rotating shaft 3 refer to the principle of the motor in the prior art, and are not described in detail herein.
Further, for a diesel engine provided with a helical air inlet, the air inlet flow is in a rotating state, and the rotating direction of the rotating shaft 3 is opposite to the rotating direction of the rotating air flow under the driving of the driving piece, namely the rotating direction of the oil injection part 2 is opposite to the rotating direction of the air inlet flow of the diesel engine, so that the moving direction of the fuel injected into the cylinder from the oil injection part 2 is opposite to the air inlet direction, and the uniformity of the mixture of the fuel and the air inlet of the engine can be further improved.
In this embodiment, for the diesel engine with a helical intake, the rotation direction of the intake passage inside the diesel engine is fixed, and therefore, the movement direction of the intake airflow is fixed, and the direction of the induced magnetic field generated by the rotating shaft 3 in the magnetic field can be changed by changing the relationship between the components of the fixed rotor assembly 31 in the driving member, so as to change the rotation direction of the rotating shaft 3 and the fuel injection portion 2, and further, the rotation direction of the fuel injected into the cylinder is opposite to the intake direction.
Therefore, the fuel and the intake air can be mixed reversely, so that the fuel injector has a good effect on a diesel engine provided with a helical air inlet passage, but can also achieve the purpose of improving the mixing uniformity of the fuel and the intake air due to the relative motion of the fuel and the intake air for other engines not provided with the helical air inlet passage, and therefore, the fuel injector can also be used for other types of engines.
Furthermore, the rotating shaft 3 has a cavity inside, and one end of the cavity extends into the inner cavity of the first casing 11 of the oil inlet portion 1, and the other end of the cavity extends into the inner cavity of the second casing 21 of the oil injection portion 2, so that the fuel oil in the oil inlet portion 1 can enter the oil injection portion 2 through the cavity, that is, the oil inlet portion 1 is communicated with the oil injection portion 2 through the rotating shaft 3.
It should be noted that, in this embodiment, the first casing 11 of the oil inlet portion 1 is provided with a first through hole for the rotating shaft 3 to pass through, and the rotating shaft 3 can rotate in the first through hole without being limited by the first casing 11; meanwhile, a second through hole is formed in a second shell 21 of the oil injection part 2, the cavity of the rotating shaft 3 is communicated with the first through hole and the second through hole, and the rotating shaft 3 is fixed in the second shell 21 through the second through hole, so that the oil injection part 2 can rotate along with the rotating shaft 3.
Of course, in the above embodiments, the oil inlet portion 1 and the oil spraying portion 2 which are separately arranged do not need to be communicated through the rotating shaft 3, and a connecting pipe or a hollow connecting column can be further arranged between the two, but in the embodiment, not only connecting parts can be reduced when the two are communicated through the rotating shaft 3, but also the relative rotation between the oil inlet portion 1 and the oil spraying portion 2 can be prevented from being influenced when the connecting parts are arranged.
Specifically, in order to ensure sufficient strength and rigidity of the shaft 3, the thickness of the side wall of the cavity is greater than 2mm after the cavity is provided.
It should be noted that the wall thickness of the rotating shaft 3 is not necessarily larger than 2mm, but may be any value that can satisfy the requirements of strength and rigidity, and the larger than 2mm is merely an example.
Specifically, in the embodiment shown in fig. 1, the above-mentioned stator and rotor assembly 31 is disposed in the first housing 11 of the oil inlet portion 1.
Obviously, the stator/rotor assembly 31 may be disposed in the second housing 21 of the oil injection part 2, or disposed outside the first housing 11 and the second housing 21, however, since the oil injection part 2 has oil injection components such as the solenoid valve, the needle valve 24, and the return spring 23 inside, the remaining space inside is small, and the stator/rotor assembly 31 is not easy to be disposed; meanwhile, when the stator/rotor assembly 31 is disposed outside the first housing 11 and the second housing 21, in order to ensure that the stator/rotor assembly can work normally and has a long service life, a housing needs to be disposed outside the stator/rotor assembly 31. And will decide rotor subassembly 31 and set up in oil feed portion 1 time, not only be favorable to spatial arrangement, can also simplify the structure when guaranteeing its life.
Further, as shown in fig. 1, the rotating shaft 3 extends to the oil inlet 12, so that the fuel entering through the oil inlet 12 can enter the cavity of the rotating shaft 3, and the pollution of the fuel to the stator and rotor assembly 31 is reduced. Meanwhile, the rotating shaft 3 is fixed on the side wall of the second through hole of the oil injection part 2 and does not extend towards the inside of the second housing 21, so that the rotating shaft 3 can be prevented from occupying the inner space of the oil injection part 2 when extending into the inside.
On the other hand, the rotating shaft 3 is fixed at the center of the oil injection part 2, so that the oil injection part 2 can uniformly and stably rotate along with the rotating shaft 3, and the increase of the stress of the rotating shaft 3 caused by eccentricity is reduced.
Meanwhile, when the engine has different requirements on the rotating speed due to different working conditions, the rotating speed of the oil injection part 2 can be changed by changing the rotating speed of the rotating shaft 3, so that the mixing uniformity of fuel oil and intake air is changed, and the energy consumption of the rotation of the oil injection part 2 can be reduced as much as possible on the basis of reducing the pollutant emission under the corresponding working conditions.
In the above embodiments, as shown in fig. 1, the needle valve 24 is disposed in the second housing 21 of the fuel injection part 2, the needle valve 24 is connected to the return spring 23, and the electromagnetic coil is further disposed, when the electromagnetic coil is energized, the electromagnetic coil generates electromagnetic force, the electromagnetic force overcomes the elastic force of the return spring 23 to suck up the needle valve 24, so as to open the fuel injection port 22, and the fuel can be injected into the cylinder through the fuel injection port 22; when the solenoid is de-energized, the electromagnetic force disappears, and the needle valve 24 moves downward and closes the fuel injection port 22 under the resilient force of the return spring 23, thereby closing the fuel injector and preventing fuel from being injected into the cylinder.
Specifically, because the oil jet 22 is opened when the electromagnetic coil in the oil injection part 2 is powered on, and the oil jet 22 is closed when the power is off, in order to save energy, the rotating shaft 3 only rotates when the oil jet 22 is opened, and the rotation of the rotating shaft 3 is controlled by the stator-rotor assembly 31, therefore, the stator-rotor assembly 31 and the electromagnetic coil can be connected with the same power supply, so as to realize the simultaneous power on and off, and play a role in saving energy.
Specifically, as shown in fig. 1, in the oil ejecting portion 2, a guide portion 25 is provided inside the second housing 21, and the guide portion 25 is opened with a guide hole through which the needle 24 passes and is capable of moving axially along the guide hole to open or close the oil ejecting port 22.
Meanwhile, the invention also provides an engine which comprises a cylinder and an oil injector, wherein the oil injector is used for injecting fuel oil into the cylinder, and the oil injector is the oil injector in any embodiment. Because the fuel injector has the technical effects, an engine comprising the fuel injector also has the corresponding technical effects, and the detailed description is omitted.
The engine is a diesel engine, and the oil injector is an oil injector of a diesel engine.
The engine and the fuel injector thereof provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. The fuel injector of the engine is characterized by comprising an oil inlet part (1) and a fuel injection part (2), wherein the oil inlet part (1) is provided with an oil inlet (12), the fuel injection part (2) is provided with a fuel injection port (22), and the oil inlet part (1) is communicated with the fuel injection part (2) so that fuel can enter the fuel injection part (2) from the oil inlet part (1);
oil feed portion (1) with oil spout portion (2) components of a whole that can function independently sets up, just oil feed portion (1) is fixed in the cylinder cap of engine, still including being used for the drive oil spout portion (2) pivoted rotation portion, rotation portion includes pivot (3) and decides rotor subassembly (31), decide rotor subassembly (31) and be used for the drive pivot (3) rotate, pivot (3) with oil spout portion (2) link firmly.
2. A fuel injector as claimed in claim 1, characterized in that the fuel inlet (1) has a first housing (11), and the stator-rotor assembly (31) is disposed in an inner cavity of the first housing (11).
3. Injector according to claim 1, characterized in that the direction of rotation of the rotary shaft (3) is opposite to the direction of flow of the engine intake air provided with a helical inlet.
4. A fuel injector according to claim 1, characterized in that the rotating shaft (3) has a cavity therein, and one end of the cavity extends into the fuel inlet portion (1) and the other end of the cavity extends into the fuel injection portion (2), so that the fuel inlet portion (1) and the fuel injection portion (2) are communicated through the rotating shaft (3).
5. A fuel injector as set forth in claim 4 characterized with said cavity having a side wall thickness greater than 2 mm.
6. A fuel injector according to any one of claims 1-5, characterized in that the rotary shaft (3) is fixed to a second housing (21) of the injection portion (2), and the injection portion (2) is symmetrical with respect to the rotary shaft (3).
7. A fuel injector as claimed in any one of claims 1 to 5, characterized in that a needle valve (24) and an electromagnetic coil are provided inside a second housing (21) of the fuel injection portion (2), and a return spring (23) is connected to the needle valve (24);
when the electromagnetic coil is electrified, the needle valve (24) is driven to move so as to open the oil injection port (22), and when the electromagnetic coil is powered off, the return spring (23) drives the needle valve (24) to move so as to close the oil injection port (22).
8. Fuel injector according to claim 7, characterized in that a guide portion (25) is provided in the second housing (21), the guide portion (25) being provided with a guide hole, the needle valve (24) passing through the guide hole and being capable of moving axially along the guide hole to open or close the fuel injection port (22).
9. An engine comprising a cylinder and an injector for injecting fuel into said cylinder, characterized in that said injector is an injector according to any one of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811604778.8A CN111365152B (en) | 2018-12-26 | 2018-12-26 | Engine and oil injector thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811604778.8A CN111365152B (en) | 2018-12-26 | 2018-12-26 | Engine and oil injector thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111365152A CN111365152A (en) | 2020-07-03 |
| CN111365152B true CN111365152B (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811604778.8A Active CN111365152B (en) | 2018-12-26 | 2018-12-26 | Engine and oil injector thereof |
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| Country | Link |
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| CN (1) | CN111365152B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114483383B (en) * | 2022-01-28 | 2023-07-21 | 刘义亭 | Gaseous fuel injector |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3854266B2 (en) * | 2003-11-26 | 2006-12-06 | 株式会社ケーヒン | In-cylinder fuel injection device for internal combustion engine |
| CN101603483A (en) * | 2009-05-18 | 2009-12-16 | 靳北彪 | Fuel injector of outer rotor for motor |
| CN101603485A (en) * | 2009-05-18 | 2009-12-16 | 靳北彪 | Fuel injector of inner rotor for motor |
| CN201407118Y (en) * | 2009-05-18 | 2010-02-17 | 靳北彪 | Outer rotor fuel ejector for engine use |
| CN102383988A (en) * | 2010-08-27 | 2012-03-21 | 现代自动车株式会社 | Injector for engine |
| CN104806399A (en) * | 2015-04-03 | 2015-07-29 | 西安交通大学 | High-pressure common rail fuel injector control valve directly driven by end face cam rotary servo motor |
| KR20160053060A (en) * | 2014-10-30 | 2016-05-13 | 현대중공업 주식회사 | Fuel injector valve for dual fuel engine |
-
2018
- 2018-12-26 CN CN201811604778.8A patent/CN111365152B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3854266B2 (en) * | 2003-11-26 | 2006-12-06 | 株式会社ケーヒン | In-cylinder fuel injection device for internal combustion engine |
| CN101603483A (en) * | 2009-05-18 | 2009-12-16 | 靳北彪 | Fuel injector of outer rotor for motor |
| CN101603485A (en) * | 2009-05-18 | 2009-12-16 | 靳北彪 | Fuel injector of inner rotor for motor |
| CN201407118Y (en) * | 2009-05-18 | 2010-02-17 | 靳北彪 | Outer rotor fuel ejector for engine use |
| CN102383988A (en) * | 2010-08-27 | 2012-03-21 | 现代自动车株式会社 | Injector for engine |
| KR20160053060A (en) * | 2014-10-30 | 2016-05-13 | 현대중공업 주식회사 | Fuel injector valve for dual fuel engine |
| CN104806399A (en) * | 2015-04-03 | 2015-07-29 | 西安交通大学 | High-pressure common rail fuel injector control valve directly driven by end face cam rotary servo motor |
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| Publication number | Publication date |
|---|---|
| CN111365152A (en) | 2020-07-03 |
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