CN101397963A - High voltage common rail electronic control injector - Google Patents
High voltage common rail electronic control injector Download PDFInfo
- Publication number
- CN101397963A CN101397963A CNA2008102257043A CN200810225704A CN101397963A CN 101397963 A CN101397963 A CN 101397963A CN A2008102257043 A CNA2008102257043 A CN A2008102257043A CN 200810225704 A CN200810225704 A CN 200810225704A CN 101397963 A CN101397963 A CN 101397963A
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- oil
- valve
- high pressure
- control room
- needle
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- 239000000446 fuel Substances 0.000 claims abstract description 51
- 241000167854 Bourreria succulenta Species 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 10
- 239000007924 injection Substances 0.000 abstract description 10
- 239000003921 oil Substances 0.000 description 90
- 239000000295 fuel oil Substances 0.000 description 10
- 101100441413 Caenorhabditis elegans cup-15 gene Proteins 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000002153 concerted effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
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Abstract
The invention discloses a high-pressure common-rail electrically controlled fuel injector, pertaining to the field of automobile parts. The invention relates to a fuel injection system of a diesel engine and particularly relates to a high-pressure common-rail electrically controlled fuel injector applied to a high-pressure common-rail fuel injection system. An excellent working environment of an electromagnet is ensured by means of a layout that an electromagnetic valve is arranged at the top so as to facilitate the obtaining of enough electromagnetic forces. Furthermore, the electromagnet can adapt to the application condition of the limitation to the mounting space at the lower part of the fuel injector; a control piston structure is saved by means of a layout that a control chamber is arranged at the bottom and the upper surface of a needle valve is directly adopted to form a part of the wall face of the control chamber, thereby not only reducing the spillage of the needle valve, but also reducing the weight of a moving part, quickening the response speed of a hydraulic response section, reducing the seating impact force of the needle valve and improving the rapidity, the accuracy and the reliability of the electrically controlled fuel injector.
Description
Technical field
The invention belongs to the auto parts and components scope, relate to a kind of high pressure common rail fuel injection system, particularly a kind of high pressure common rail electric control fuel injector.
Background technique
Now, automobile industry is more and more higher to the requirement of emission performance, Economy, reliability, in order to improve diesel engine performance, the fuel-injected high-pressure trend, become more meticulous, the inevitable direction of development that dexterityization is fuel injection system.High pressure common rail fuel injection system is the main developing direction of diesel fuel injection system now, and high pressure common rail electric control fuel injector is the core key part of high pressure common rail fuel injection system, has determined the multinomial key parameter such as peak injection pressure, speed of response, maximum injection rate, reliability of high pressure common rail fuel injection system.
Existing high pressure common rail electric control fuel injector, just like the typical configurations of Fig. 1, mainly by oil returning pipe joint 1, electrical connector 2, solenoid valve 3, high pressure oil joint 4, main oil gallery 5, back oil road 12, draining metering-orifice 6, oil-feed metering-orifice 7, control room 8, control piston 9, needle valve spring 10, needle valve spring lower spring cup 15, oil nozzle 11 and be arranged on needle-valve 13 in the oil nozzle etc. and form.
The annexation of existing each main structure of high pressure common rail electric control fuel injector is: high pressure oil joint 4 externally is communicated with high-pressure oil pipe, internally is communicated with main oil gallery 5; Main oil gallery 5 is communicated to the oil inlet hole of oil-feed metering-orifice 7 and oil nozzle 11; Oil returning pipe joint 1 externally is communicated with return tube, internally is communicated with back oil road 12; Back oil road 12 is communicated with needle valve spring chamber 14, and is connected with draining metering-orifice 6 by solenoid valve 3; The connected state of solenoid valve 3 control draining metering-orifices 6 and back oil road 12: when solenoid valve 3 energisings, solenoid valve 3 is opened, and draining metering-orifice 6 is communicated with back oil road 12, and when solenoid valve 3 outages, solenoid valve 3 cuts out, and draining metering-orifice 6 disconnects with back oil road 12; Control room 8 is communicated with oil-feed metering-orifice 7 and draining metering-orifice 6, be that oil-feed metering-orifice 7 connects control room 8 and main oil gallery 5, make high pressure oil enter control room 8 by oil-feed metering-orifice 7, draining metering-orifice 6 connects control room 8 and solenoid valve 3, when solenoid valve 3 was opened, control room 8 inner high voltage oil can be by draining metering-orifice 6 earial drainages to back oil road 12; A bottom surface in control room 8 is made of the end face of control piston 9, makes the action of hydraulic force in control room 8 form control force in control piston 9; Solenoid valve 3 links to each other with electronic controller by electrical connector 2; Control piston 9 passes to control force the needle-valve 13 of oil nozzle 11; Needle valve spring 10 is used for needle-valve 13 by needle valve spring lower spring cup 15 with the needle valve spring masterpiece.
The groundwork process of existing high pressure common rail electric control fuel injector is:
Under the situation that does not have high pressure fuel to insert, no matter solenoid valve 3 outages are still switched on, and all do not have action of hydraulic force in the high pressure common rail electric control fuel injector everywhere, and 13 of needle-valves are subjected to the effect of needle valve spring power, and under the effect of needle valve spring power, close, do not have fuel oil to pass through oil nozzle 11 and flow out.
Under the situation that high pressure fuel access and solenoid valve 3 outages are arranged, high pressure oil enters control room 8 by oil-feed metering-orifice 7, solenoid valve 3 cuts out simultaneously, fuel oil can't flow out in the control room 8, fuel pressure rises to fuel pressure in the main oil gallery 5 and equates in the final control room 8, this moment the control force that on control piston 9, produces of control room 8 and needle valve spring power the active force of the oil holding slot 16 inner high voltage fuel oils that are subjected to greater than needle-valve 13 with joint efforts, needle-valve 13 is closed under the acting in conjunction of the control force of needle valve spring power and control piston 9, does not have fuel oil to pass through oil nozzle 11 ejections.
Under the situation that high pressure fuel access and solenoid valve 3 energisings are arranged, solenoid valve 3 is opened, high pressure fuel in the control room 8 passes through draining metering-orifice 6 earial drainages to back oil road 12, fuel pressure descends in the control room 8, the control force of control piston 9 descends, when the active force of the oil holding slot 16 inner high voltage fuel oils that are subjected to less than needle-valve 13 of making a concerted effort of the control force of control piston 9 and needle valve spring power, needle-valve 13 is opened, and high pressure fuel is by oil nozzle 11 ejections.
The high pressure common rail electric control fuel injector of above-mentioned configuration has the structure of an elongated control piston 9, require oil injector body elongated, when installing space is narrow and small, just need long control piston.Flexible big, the poor stability of elongated control piston, inertia are big, thereby have reduced speed of response and control accuracy, and can increase the weight of to close the time to the impact of needle-valve seat surface.
Summary of the invention
In order to solve the high pressure common rail electric control fuel injector design problem under the elongated narrow and small installing space, the present invention proposes a kind of high pressure common rail electric control fuel injector.
Technological scheme of the present invention is as follows:
A kind of high pressure common rail electric control fuel injector, comprise oil returning pipe joint 1, electrical connector 2, solenoid valve 3, high pressure oil joint 4, main oil gallery 5, back oil road 12, draining metering-orifice 6, oil-feed metering-orifice 7, control room 8, needle valve spring 10, needle valve spring lower spring cup 15, oil nozzle 11 and be arranged on the interior needle-valve 13 of oil nozzle, it is characterized in that: described solenoid valve 3 places the oil sprayer top; Described control room 8 is arranged on the top of needle valve spring lower spring cup 15, and needle valve spring 10 is installed in the control room 8; Be provided with draining road 17 in oil injector body inside, the upper end in draining road is communicated with back oil road 12 by solenoid valve 3, the lower end in draining road is communicated with control room 8 by draining metering-orifice 6, is provided with oil-feed metering-orifice 7 at the control room side wall surface, and control room 8 is communicated with main oil gallery 5 by oil-feed metering-orifice 7.
Technical characteristics of the present invention also is: described solenoid valve adopts cone valve, balanced type cone valve, ball valve or plane valve; Between described main oil gallery 5 and high pressure oil joint 4, chink type filter cleaner or throttle orifice are set; Needle valve spring upper spring seat 18 is set in described control room, and this spring seat is used for the installation and the location of needle valve spring, simultaneously as the snubber that Rong Tihe is used to adjust needle lift that subtracts that is used to adjust the control room volume.
Invention compared with prior art has the following advantages and the high-lighting effect: place at solenoid valve under the situation on oil sprayer top, saved the flexible big and big control piston structure of inertia.Under the condition that guarantees magnetic valve performance, installing space and works fine environment, reduced the quality of needle valve movement part, accelerate the hydraulic response speed of high pressure common rail electric control fuel injector, improved rapidity, accuracy and the reliability of high pressure common rail electric control fuel injector.
Description of drawings
Fig. 1 is existing high pressure common rail electric control fuel injector structure diagram.
Fig. 2 is a high pressure common rail electric control fuel injector configuration picture of the present invention.
Fig. 3 is the partial enlarged drawing in control room among Fig. 2.
Among the figure: 1-oil returning pipe joint; 2-electrical connector; 3 solenoid valves; 4-high pressure oil joint; 5-main oil gallery; 6-draining metering-orifice; 7-oil-feed metering-orifice; 8-control room; 9-control piston; 10-needle valve spring; 11-oil nozzle; 12-back oil road; 13-needle-valve; 14-needle valve spring chamber; 15-needle valve spring lower spring cup; 16-oil holding slot; 17-draining road; 18-needle valve spring upper spring seat.
Embodiment
Below in conjunction with accompanying drawing concrete structure of the present invention, working principle and working procedure are described further.
As shown in Figures 2 and 3, a kind of high pressure common rail electric control fuel injector of the present invention, comprise oil returning pipe joint 1, electrical connector 2, solenoid valve 3, high pressure oil joint 4, main oil gallery 5, back oil road 12, draining metering-orifice 6, oil-feed metering-orifice 7, control room 8, needle valve spring 10, needle valve spring lower spring cup 15, oil nozzle 11 and be arranged on the interior needle-valve 13 of oil nozzle, described solenoid valve 3 places the oil sprayer top; Described control room 8 is arranged on the top of needle valve spring lower spring cup 15, and needle valve spring 10 is installed in the control room 8; Be provided with draining road 17 in oil injector body inside, the upper end in draining road is communicated with back oil road 12 by solenoid valve 3, the lower end in draining road is communicated with control room 8 by draining metering-orifice 6, is provided with oil-feed metering-orifice 7 at the control room side wall surface, and control room 8 is communicated with main oil gallery 5 by oil-feed metering-orifice 7.
The annexation of each main structure is: high pressure oil joint 4 externally is communicated with high-pressure oil pipe, internally is communicated with main oil gallery 5; Main oil gallery 5 is communicated to the oil inlet hole of oil-feed metering-orifice 7 and oil nozzle 11; Oil returning pipe joint 1 externally is communicated with return tube, internally is communicated with back oil road 12; The upper end in draining road 17 is communicated with back oil road 12 by solenoid valve 3; The lower end in draining road is communicated with control room 8 by draining metering-orifice 6; The connected state of solenoid valve 3 control draining roads 17 and back oil road 12: when solenoid valve 3 energisings, solenoid valve 3 is opened, and draining road 17 is communicated with back oil road 12, and when solenoid valve 3 outages, solenoid valve 3 cuts out, and draining road 17 disconnects with back oil road 12; Control room 8 is communicated with oil-feed metering-orifice 7 and draining metering-orifice 6, be that oil-feed metering-orifice 7 connects control room 8 and main oil gallery 5, make high pressure oil enter control room 8 by oil-feed metering-orifice 7, draining metering-orifice 6 connects control room 8 and draining road 17, when solenoid valve 3 was opened, control room 8 inner high voltage oil can pass through draining metering-orifice 6, draining road 17 earial drainages to back oil road 12; The bottom surface in control room 8 or the part of bottom surface are made of the end face of needle-valve 13, make the action of hydraulic force in control room 8 form control force in needle-valve 13; Solenoid valve 3 is the balanced type cone valve, places the oil sprayer top, links to each other with electronic controller by electrical connector 2; Needle valve spring 10 is installed in the control room 8, needle-valve 13 is applied the needle valve spring power that makes it to close; Needle valve spring lower spring cup 15 has the effect of adjusting needle lift.Needle valve spring upper spring seat 18 is set in the control room, and this spring seat is used for the installation and the location of needle valve spring, simultaneously as the snubber that Rong Tihe is used to adjust needle lift that subtracts that is used to adjust the control room volume.
The present invention can also be provided with the chink type filter cleaner or between main oil gallery 5 and high pressure oil joint 4 throttle orifice is being set between main oil gallery 5 and the high pressure oil joint 4.
The groundwork process of high pressure common rail electric control fuel injector of the present invention is:
Under the situation that does not have high pressure fuel to insert, no matter solenoid valve 3 outages are still switched on, and all do not have action of hydraulic force in the high pressure common rail electric control fuel injector everywhere, and 13 of needle-valves are subjected to the effect of needle valve spring power, and under the effect of needle valve spring power, close, do not have fuel oil to pass through oil nozzle 11 and flow out;
Under the situation that high pressure fuel access and solenoid valve 3 outages are arranged, high pressure oil enters control room 8 by oil-feed metering-orifice 7, solenoid valve 3 cuts out simultaneously, fuel oil can't flow out in the control room 8, fuel pressure rises to fuel pressure in the main oil gallery 5 and equates in the final control room 8, this moment the control force that on needle-valve 13 end faces, produces of control room 8 with the active force of the oil holding slot 16 inner high voltage fuel oils that are subjected to greater than needle-valve 13 with joint efforts of needle valve spring power, needle-valve 13 is closed under the acting in conjunction of needle valve spring power and control force, does not have fuel oil to pass through oil nozzle 11 ejections.
Under the situation that high pressure fuel access and solenoid valve 3 energisings are arranged, solenoid valve 3 is opened, high pressure fuels in the control room 8 by draining metering-orifice 6 and draining road 17 earial drainages to back oil road 12, fuel pressure descends in the control room 8, the control force of needle-valve 13 end faces descends, when the active force of the oil holding slot 16 inner high voltage fuel oils that are subjected to less than needle-valve 13 of making a concerted effort of control force and needle valve spring power, needle-valve 13 is opened, and high pressure fuel is by oil nozzle 11 ejections.
Claims (5)
1. high pressure common rail electric control fuel injector, comprise oil returning pipe joint (1), electrical connector (2), solenoid valve (3), high pressure oil joint (4), main oil gallery (5), back oil road (12), draining metering-orifice (6), oil-feed metering-orifice (7), control room (8), needle valve spring (10), needle valve spring lower spring cup (15), oil nozzle (11) and be arranged on the interior needle-valve (13) of oil nozzle, it is characterized in that: described solenoid valve (3) places the oil sprayer top; Described control room (8) is arranged on the upper end of the oil nozzle (11) of oil sprayer bottom, and the bottom surface of control room (8) or the part of bottom surface are made of the end face of needle-valve (13), and needle valve spring (10) is installed in the control room (8); Be provided with draining road (17) in oil injector body inside, the upper end in draining road is communicated with back oil road (12) by solenoid valve (3), the lower end in draining road is communicated with control room (8) by draining metering-orifice (6), be provided with oil-feed metering-orifice (7) at the control room side wall surface, control room (8) are communicated with main oil gallery (5) by oil-feed metering-orifice (7).
2. according to the described a kind of high pressure common rail electric control fuel injector of claim 1, it is characterized in that: described solenoid valve adopts cone valve, balanced type cone valve, ball valve or plane valve.
3. according to the described a kind of high pressure common rail electric control fuel injector of claim 1, it is characterized in that: between described main oil gallery (5) and high pressure oil joint (4), the chink type filter cleaner is set.
4. according to claim 1 or 3 described a kind of high pressure common rail electric control fuel injectors, it is characterized in that: between described main oil gallery (5) and high pressure oil joint (4), throttle orifice is set.
5. according to the described a kind of high pressure common rail electric control fuel injector of claim 1, it is characterized in that: needle valve spring upper spring seat (18) is set in described control room (8), this spring seat is used for the installation and the location of needle valve spring (10), simultaneously as the snubber that Rong Tihe is used to adjust needle lift that subtracts that is used to adjust the control room volume.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102257043A CN101397963A (en) | 2008-11-07 | 2008-11-07 | High voltage common rail electronic control injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102257043A CN101397963A (en) | 2008-11-07 | 2008-11-07 | High voltage common rail electronic control injector |
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| Publication Number | Publication Date |
|---|---|
| CN101397963A true CN101397963A (en) | 2009-04-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102257043A Pending CN101397963A (en) | 2008-11-07 | 2008-11-07 | High voltage common rail electronic control injector |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155340A (en) * | 2011-03-22 | 2011-08-17 | 张国平 | Injection solenoid valve for fuel gas common rail system |
| CN102369348A (en) * | 2009-04-02 | 2012-03-07 | 罗伯特·博世有限公司 | Fuel injection device |
| CN102678414A (en) * | 2012-05-02 | 2012-09-19 | 欧阳光耀 | Piezoelectric injector for diesel engine |
| CN103423049A (en) * | 2013-09-06 | 2013-12-04 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Fuel injector assembly |
| CN103644058A (en) * | 2013-12-17 | 2014-03-19 | 中国北方发动机研究所(天津) | Oil inlet and return orifice of common rail oil sprayer and control cavity structure |
-
2008
- 2008-11-07 CN CNA2008102257043A patent/CN101397963A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102369348A (en) * | 2009-04-02 | 2012-03-07 | 罗伯特·博世有限公司 | Fuel injection device |
| CN102369348B (en) * | 2009-04-02 | 2014-12-10 | 罗伯特·博世有限公司 | Fuel injection device |
| US9175652B2 (en) | 2009-04-02 | 2015-11-03 | Robert Bosch Gmbh | Fuel injection device |
| CN102155340A (en) * | 2011-03-22 | 2011-08-17 | 张国平 | Injection solenoid valve for fuel gas common rail system |
| CN102678414A (en) * | 2012-05-02 | 2012-09-19 | 欧阳光耀 | Piezoelectric injector for diesel engine |
| CN103423049A (en) * | 2013-09-06 | 2013-12-04 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Fuel injector assembly |
| CN103423049B (en) * | 2013-09-06 | 2015-10-28 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Injector assembly |
| CN103644058A (en) * | 2013-12-17 | 2014-03-19 | 中国北方发动机研究所(天津) | Oil inlet and return orifice of common rail oil sprayer and control cavity structure |
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| C06 | Publication | ||
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Open date: 20090401 |