CN112343744A - Oil way structure of oil sprayer control cavity - Google Patents
Oil way structure of oil sprayer control cavity Download PDFInfo
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- CN112343744A CN112343744A CN202011210113.6A CN202011210113A CN112343744A CN 112343744 A CN112343744 A CN 112343744A CN 202011210113 A CN202011210113 A CN 202011210113A CN 112343744 A CN112343744 A CN 112343744A
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- Prior art keywords
- oil
- cavity
- pressure
- sprayer
- control
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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
- 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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- 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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- 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 provides an oil way structure of a control cavity of an oil sprayer, which comprises a high-pressure oil inlet cavity of the oil sprayer, an oil inlet throttling hole, a control cavity, a two-way throttling hole, a second oil inlet throttling hole and an armature cavity which can be connected with an oil pressure control device; the high-pressure oil inlet cavity of the oil sprayer is connected with the oil control cavity through an oil inlet throttling hole, the oil control cavity is connected with the armature cavity through a bidirectional throttling hole, and the high-pressure oil inlet cavity of the oil sprayer is connected with the armature cavity through a second oil inlet throttling hole. The invention relates to an oil circuit structure of a control cavity of an oil sprayer, which solves the technical problems that in the prior art, a one-in one-return type electric control oil sprayer has limitation when the pressure of the control cavity is regulated to release and recover pressure, and the needle valve moves to respond slowly.
Description
Technical Field
The invention belongs to the field of high-pressure common rail systems, and particularly relates to an oil way structure of a control cavity of an oil sprayer.
Background
The electric control oil injector mainly influences the opening and closing speed of an oil nozzle needle valve through the pressure relief speed and the pressure recovery speed of an oil injector control cavity. The needle valve can be disturbed by hydraulic force in the moving process, so that the stability of the oil sprayer in the oil injection process is influenced. The opening speed of the needle valve is reduced, so that the oil injection rule can be optimized, and the reduction of soot emission and the reduction of emission are facilitated; the closing speed of the needle valve of the oil injector is increased, so that the closing time of the needle valve can be shortened, and the stability of an oil injection process is improved. Under the same working condition, the shortening of the duration can improve the average oil injection rate of the oil injector, thereby reducing the oil consumption of the engine and being an important performance index of the performance of the oil injector.
The oil circuit structure of the control cavity of the conventional oil sprayer is that high-pressure fuel oil enters the control cavity through an oil inlet throttling hole through an oil inlet channel, the control cavity is decompressed through a bidirectional throttling hole after an electromagnetic valve is opened, a needle valve is lifted under the pressure action of a needle valve groove, when the electromagnetic valve is closed, the control cavity rapidly recovers pressure through the oil inlet throttling hole, and the needle valve is closed under the downward pressure difference. The one-in-one-out type electric control oil sprayer in the prior art has limitation in pressure relief and pressure recovery of a control cavity, slow movement response of a needle valve is caused, pressure relief speed of the control cavity is increased in order to improve movement response of the needle valve, an oil return measuring hole needs to be increased, the oil inlet measuring hole needs to be increased in order to accelerate closing of the needle valve, oil return amount can be increased due to increase of the oil inlet measuring hole and the oil return measuring hole, efficiency is reduced, meanwhile, pressure fluctuation is greatly influenced due to the fact that the oil inlet measuring hole is large, and accordingly oil spraying consistency is poor. In addition, the needle valve closing speed is not fast enough due to the structure, so that the injection stability in the injection process is reduced.
Disclosure of Invention
In view of the above, the invention aims to provide an oil path structure of a control cavity of an oil injector, and solves the technical problem that in the prior art, a one-in-one-return type electronic control oil injector has limitation in pressure relief and pressure recovery of the control cavity, and slow needle valve motion response is caused by the limitation.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an oil way structure of a control cavity of an oil sprayer comprises a high-pressure oil inlet cavity of the oil sprayer, an oil inlet throttling hole, a control cavity, a two-way throttling hole, a second oil inlet throttling hole and an armature cavity which can be connected with a control oil pressure device;
the high-pressure oil inlet cavity of the oil injector is connected with the oil control cavity through the oil inlet throttling hole, the oil control cavity is connected with the armature cavity through the two-way throttling hole, and the high-pressure oil inlet cavity of the oil injector is connected with the armature cavity through the second oil inlet throttling hole.
Furthermore, the oil way structure of the control cavity of the oil sprayer further comprises a plunger moving part and an oil nozzle high-pressure cavity, the high-pressure oil inlet cavity of the oil sprayer is communicated with the oil nozzle high-pressure cavity, one end of the plunger moving part is connected with the oil nozzle high-pressure cavity, and the other end of the plunger moving part is connected with the control cavity.
Furthermore, the oil way structure of the oil sprayer control cavity further comprises an electromagnetic valve and an electromagnetic valve electric control device, the electromagnetic valve is connected with the armature cavity, the electromagnetic valve is used for controlling oil pressure in the armature cavity, and the electromagnetic valve electric control device is connected with the electromagnetic valve.
Furthermore, the oil way structure of the oil sprayer control cavity further comprises an oil sprayer oil return pipeline, and the armature cavity is connected with the oil sprayer oil return pipeline through the electromagnetic valve.
Furthermore, the oil way structure of the oil sprayer control cavity further comprises a high-pressure oil way inlet, and the high-pressure oil way inlet is connected with the high-pressure oil inlet cavity of the oil sprayer.
Further, the plunger moving part is an oil nozzle needle valve.
Compared with the prior art, the oil way structure of the control cavity of the oil sprayer has the following advantages:
according to the oil way structure of the control cavity of the oil sprayer, the armature cavity and the high-pressure oil inlet cavity of the oil sprayer are directly connected through the second oil inlet throttling hole, and the matching condition of the oil inlet throttling hole and the oil outlet throttling area is combined, so that the opening speed of a needle valve can be reduced, the closing speed of the needle valve can be increased, the oil spraying rule can be optimized, the hydraulic interference time in the movement process of the needle valve can be reduced, and the oil spraying stability of the oil sprayer can be improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of an oil path structure of a control cavity of a fuel injector according to an embodiment of the present invention;
FIG. 2 is a diagram showing a comparison between the oil path structure of an injector control chamber according to an embodiment of the present invention and the oil path structure of an existing injector control chamber;
fig. 3 is a comparison diagram of the oil injection law of the oil way structure of the oil injector control cavity according to the embodiment of the present invention and the oil way structure of the existing oil injector control cavity.
Description of reference numerals:
1. the high-pressure oil way comprises a high-pressure oil way inlet 2, an oil sprayer high-pressure oil inlet cavity 3, a control cavity 4, an armature cavity 5, an electromagnetic valve 6, an oil sprayer oil return pipeline 7, an oil sprayer electric control device 8, an oil sprayer high-pressure cavity 9, a plunger moving part 10, an oil inlet throttling hole 11, a bidirectional throttling hole 12 and a second oil inlet throttling hole; A. two times of feeding are carried out; B. one goes back.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
An oil way structure of a control cavity of an oil sprayer is shown in figure 1 and comprises an oil sprayer high-pressure oil inlet cavity 2, an oil inlet throttling hole 10, a control cavity 3, a plunger moving part 9, an oil nozzle high-pressure cavity 8, an electromagnetic valve 5, an electromagnetic valve electric control device 7, an oil sprayer oil return pipeline 6, a high-pressure oil way inlet 1, a two-way throttling hole 11, a second oil inlet throttling hole 12 and an armature cavity 4 capable of being connected with an oil pressure control device, wherein the high-pressure oil way inlet 1 is connected with the oil sprayer high-pressure oil inlet cavity 2;
in the embodiment, the high-pressure oil inlet cavity 2 of the oil sprayer is connected with the oil control cavity through an oil inlet throttling hole 10, the oil control cavity is connected with the armature cavity 4 through a two-way throttling hole 11, and the high-pressure oil inlet cavity 2 of the oil sprayer is connected with the armature cavity 4 through a second oil inlet throttling hole 12.
The electromagnetic valve 5 is connected with the armature cavity 4, the electromagnetic valve 5 is used for controlling oil pressure in the armature cavity 4, and the electromagnetic valve electric control device 7 is connected with the electromagnetic valve 5, in the embodiment, the electromagnetic valve electric control device 7 is an existing electromagnetic valve electric control device, and the armature cavity 4 is connected with an oil injector oil return pipeline 6 through the electromagnetic valve 5;
the oil circuit of the oil sprayer control cavity can utilize the second oil inlet throttling hole 12 to realize effective control on the pressure relief and the re-pressing speed of the control cavity 3, further influence the movement speed of a moving part of the oil sprayer through hydraulic force and achieve the required ideal oil spraying speed shape.
As shown in fig. 2 and 3, which are comparative examples generated by the present invention compared with a general structure, the oil path structure of the control chamber of the present embodiment is a two-in-one-back-a structure, and the oil path structure of the control chamber in the prior art is a one-in-one-back-B structure. Under the same rail pressure, control pulse width and other environments, the oil injection regular shape reaches the ideal condition of slow first and then fast when the second oil inlet throttle hole 12 is added to the control cavity 3, namely, the two-in-one structure. Comparison of needle valve movement speed as shown in fig. 3, the oil path structure after adding the second oil inlet orifice 12 results in a needle valve closing speed of 2m/s in terms of needle valve closing speed, whereas the needle valve movement speed in the one-pass oil path structure is only 1.2 m/s.
TABLE 1
Table 1 shows the oil mass characteristics under different control chamber oil circuit structures, the control chamber oil circuit structure in the prior art is one in one, the control chamber oil circuit structure of this embodiment is two in one, because the closing speed of the needle valve is greatly increased, the duration of the oil injector under the same working condition is shortened, the increase of the second oil inlet throttle hole results in the oil injection duration being shortened by 0.036ms, and the average oil injection rate is increased by 7.05mm 3/ms.
The oil way of the oil sprayer control cavity can obviously improve the stability of the oil spraying process.
Working mode of the example
When the electromagnetic valve 5 is opened, the control cavity 3 is decompressed through the two-way throttling hole 11, an oil way flows to a low-pressure oil return pipeline, high-pressure fuel enters the control cavity 3 from the oil inlet throttling hole 10, and simultaneously flows into the armature cavity 4 from the second oil inlet throttling hole 12, so that the pressure difference in the control cavity 3 is reduced, and the opening speed of a needle valve of the oil injector is reduced.
When the electromagnetic valve 5 is closed, high-pressure oil enters the control cavity 3 through the oil inlet throttling hole 11, and simultaneously flows into the control cavity 3 from the second oil inlet throttling hole 12 through the two-way throttling hole 10, so that the pressure recovery speed of the control cavity 3 is improved, and the closing of a needle valve of the oil injector is accelerated.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a sprayer control chamber oil circuit structure which characterized in that: the oil injector control device comprises an oil injector high-pressure oil inlet cavity (2), an oil inlet throttling hole (10), a control cavity (3), a two-way throttling hole (11), a second oil inlet throttling hole (12) and an armature cavity (4) which can be connected with a control oil pressure device;
the high-pressure oil inlet cavity (2) of the oil sprayer is connected with the oil control cavity through the oil inlet throttling hole (10), the oil control cavity is connected with the armature cavity (4) through the two-way throttling hole (11), and the high-pressure oil inlet cavity (2) of the oil sprayer is connected with the armature cavity (4) through the second oil inlet throttling hole (12).
2. The fuel injector control cavity fuel path structure according to claim 1, characterized in that: the oil way structure of the oil sprayer control cavity further comprises a plunger moving part (9) and an oil nozzle high-pressure cavity (8), the oil sprayer high-pressure oil inlet cavity (2) is communicated with the oil nozzle high-pressure cavity (8), one end of the plunger moving part (9) is connected with the oil nozzle high-pressure cavity (8), and the other end of the plunger moving part (9) is connected with the control cavity (3).
3. The fuel injector control cavity fuel path structure according to claim 1, characterized in that: the oil way structure of the oil sprayer control cavity further comprises an electromagnetic valve (5) and an electromagnetic valve electric control device (7), the electromagnetic valve (5) is connected with the armature cavity (4), the electromagnetic valve (5) is used for controlling oil pressure in the armature cavity (4), and the electromagnetic valve electric control device (7) is connected with the electromagnetic valve (5).
4. The fuel injector control chamber fuel path structure according to claim 3, characterized in that: the oil way structure of the oil sprayer control cavity further comprises an oil sprayer oil return pipeline (6), and the armature cavity (4) is connected with the oil sprayer oil return pipeline (6) through the electromagnetic valve (5).
5. The fuel injector control chamber fuel path structure according to any one of claims 1 to 4, characterized in that: the oil way structure of the oil sprayer control cavity further comprises a high-pressure oil way inlet (1), and the high-pressure oil way inlet (1) is connected with the high-pressure oil inlet cavity (2) of the oil sprayer.
6. The fuel injector control chamber fuel path structure according to claim 5, characterized in that: the plunger moving part (9) is an oil nozzle needle valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011210113.6A CN112343744A (en) | 2020-11-03 | 2020-11-03 | Oil way structure of oil sprayer control cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011210113.6A CN112343744A (en) | 2020-11-03 | 2020-11-03 | Oil way structure of oil sprayer control cavity |
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| Publication Number | Publication Date |
|---|---|
| CN112343744A true CN112343744A (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011210113.6A Pending CN112343744A (en) | 2020-11-03 | 2020-11-03 | Oil way structure of oil sprayer control cavity |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10063193A1 (en) * | 2000-12-19 | 2002-06-27 | Bosch Gmbh Robert | Solenoid valve for controlling an injection valve of an internal combustion engine |
| CN101509450A (en) * | 2009-03-20 | 2009-08-19 | 天津大学 | Common rail type electrically controlled injector |
| JP2010209767A (en) * | 2009-03-09 | 2010-09-24 | Denso Corp | Fuel injection valve |
| CN104100425A (en) * | 2014-07-23 | 2014-10-15 | 哈尔滨工程大学 | Electronically-controlled common-rail oil injector of heavy-oil diesel for ship |
| DE102015204037A1 (en) * | 2015-03-06 | 2016-09-08 | Robert Bosch Gmbh | Method for controlling a common-rail injection system |
| CN106762281A (en) * | 2017-01-18 | 2017-05-31 | 哈尔滨工程大学 | A kind of electric-controlled fuel injector with hydraulic feedback |
| CN206753784U (en) * | 2017-01-18 | 2017-12-15 | 哈尔滨工程大学 | A kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch |
| CN110848060A (en) * | 2019-10-14 | 2020-02-28 | 中国北方发动机研究所(天津) | Electric control pressure accumulation oil sprayer |
-
2020
- 2020-11-03 CN CN202011210113.6A patent/CN112343744A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10063193A1 (en) * | 2000-12-19 | 2002-06-27 | Bosch Gmbh Robert | Solenoid valve for controlling an injection valve of an internal combustion engine |
| JP2010209767A (en) * | 2009-03-09 | 2010-09-24 | Denso Corp | Fuel injection valve |
| CN101509450A (en) * | 2009-03-20 | 2009-08-19 | 天津大学 | Common rail type electrically controlled injector |
| CN104100425A (en) * | 2014-07-23 | 2014-10-15 | 哈尔滨工程大学 | Electronically-controlled common-rail oil injector of heavy-oil diesel for ship |
| DE102015204037A1 (en) * | 2015-03-06 | 2016-09-08 | Robert Bosch Gmbh | Method for controlling a common-rail injection system |
| CN106762281A (en) * | 2017-01-18 | 2017-05-31 | 哈尔滨工程大学 | A kind of electric-controlled fuel injector with hydraulic feedback |
| CN206753784U (en) * | 2017-01-18 | 2017-12-15 | 哈尔滨工程大学 | A kind of board-like electric-controlled fuel injector of minute hand valve opening with ditch |
| CN110848060A (en) * | 2019-10-14 | 2020-02-28 | 中国北方发动机研究所(天津) | Electric control pressure accumulation oil sprayer |
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Application publication date: 20210209 |