CN1854499A - Oil thrower of Co-rail system - Google Patents
Oil thrower of Co-rail system Download PDFInfo
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- CN1854499A CN1854499A CN 200510067151 CN200510067151A CN1854499A CN 1854499 A CN1854499 A CN 1854499A CN 200510067151 CN200510067151 CN 200510067151 CN 200510067151 A CN200510067151 A CN 200510067151A CN 1854499 A CN1854499 A CN 1854499A
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- oil
- control
- control valve
- rail system
- spool
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Abstract
There is a control valve member in the invention, in which a controlling spool comprises a sealing conical surface, an axial oil channel, a circumferential oil inlet channel and a circumferential oil return channel; a controlling valve seat comprises an oil inlet channel and an oil inlet circle groove. The invention can achieve the goal of controlling the oil-injection rate.
Description
Technical field:
The invention belongs to internal-combustion engine common rail system oil sprayer field.
Background technique:
Since the last century the nineties, countries in the world are more and more paid attention to environmental problem, particularly the internal-combustion engine as power train in vehicle application have been proposed the emission request of increasingly stringent.For example European Union member countries have worked out and have progressively improved Europe of requiring No. 1, No. 2, Europe, No. 3 Abgasgesetzs in Europe and following Europe No. 4 standards that will reach.The standard GB 17691-2001 of China requires to reach respectively at 2000 and 2003 the emission limit that is equivalent to No. 2, No. 1, Europe and Europe, estimates soon enforcement to be equivalent to European No. 3 Abgasgesetzs.When No. 3 Abgasgesetzs in Europe, the 7.0g/kW.h that the limit value of NOx is No. 2 from Europe is reduced to 5.0g/kW.h, and the 0.15g/kW.h that the limit value of PM is No. 2 from Europe is reduced to 0.1g/kW.h.Realize above-mentioned Abgasgesetz, for diesel engine, oil-fired system must adopt the high-pressure injection technology, particularly adopts jet pressure to be independent of the common-rail injection system of rotating speed, load.Each big oil-fired system manufacturing company of the world in recent years, released Common rail fuel injection system one after another as Japanese DENSO (Common Rail Fuel Injection System for Improvement of EnginePerformance on Heavy Duty Diesel Engine SAE paper 980806), companies such as German BOSCH, U.S. DELPHI, satisfied the higher emission performance requirement of diesel engine with independent intellectual property right.
In the common-rail injector of prior art, open between the fuel injection period of firing chamber when injector valve, high pressure fuel oil duct-control room-low pressure oil duct is communicated with each other, and therefore has the energy loss of high pressure fuel.
Summary of the invention:
The purpose of this invention is to provide a kind of oil thrower of Co-rail system, injector control valve parts wherein can be eliminated the shortcoming that existing common-rail injector exists in the energy loss of elimination of injector valve open period or minimizing high pressure fuel.
The technical solution adopted in the present invention provides a kind of oil thrower of Co-rail system, injector control valve parts wherein, mainly comprise electromagnetic coil parts (1), solenoid valve spring (2), control spool (3), control valve seat (4), oil injector body (5), control piston (7), its major character is: sealing cone (15), axial oil duct (10), circumferential oil input channel (13), circumferential back oil road (14) are arranged on a. control spool (3); B., oil input channel (11) and oil-feed ring recess (12) are arranged on the control valve seat (4).
The present invention compares the beneficial effect that is had with prior art: cancelled large and small restricting orifice of the prior art, eliminated or reduce the energy loss of injector valve open period high pressure fuel.
Description of drawings:
Fig. 1 is the injector control valve parts sectional drawing of embodiments of the invention.
Fig. 2 is the injector control valve parts fundamental diagram of embodiments of the invention.
Fig. 3 is a kind of fundamental diagram of injector control valve parts of the prior art that is used to contrast.
Embodiment:
Below in conjunction with description of drawings the specific embodiment of the present invention.
Fig. 1 and Fig. 2 are the sectional drawing and the fundamental diagrams of embodiments of the invention.High pressure fuel is by the high pressure oil input channel (8) on the oil injector body (5), enter the oil input channel (11) of control valve seat (4), by oil-feed ring recess (12), enter the circumferential oil input channel (13) of control spool (3) then, flow into control room (9) by axial oil duct (10) at last.The top of control piston (7) is just acting on high pressure fuel power like this, and this power to injector valve (16) afterbody, makes needle-valve tightly be landed on the needle-valve body (17) by transfer function.
When electromagnetic coil parts (1) are switched on, the electromagnetic force that produces makes control spool (3) upwards rise, along with the rising of control spool, circumferentially oil input channel (13) leaves the oil-feed ring recess (12) on the control valve seat, thereby has closed the passage that high pressure fuel enters control room (9); Control the volume increase of the rising of spool with control room (9) simultaneously, cause control room inner high voltage fuel pressure to reduce, the power that promptly acts on the needle-valve afterbody reduces.And the high pressure fuel pressure of oil nozzle oil holding slot (18) does not change, and therefore promotes needle-valve and upwardly opens, and finishes the oil spout action.The energy loss that in whole injection process, does not have high pressure fuel.If when on the control spool, circumferential back oil road (14) being arranged, when the control spool upwards rises, closing when high pressure fuel enters the passage of control room (9), circumferentially back oil road (14) is linked up with the low pressure draining hole (6) on the control valve seat, with the high pressure fuel decompression in control room, finish the oil spout action.Obviously the energy loss that in this injection process, also has high pressure fuel, but compared with prior art, owing in injection process, cut off the high pressure fuel that leads to the control room, so the energy loss of high pressure fuel will reduce greatly.
When electromagnetic coil parts (1) cut off the power supply, under the effect of solenoid valve spring (2) power, control spool (3) is taken a seat downwards, circumferentially the oil-feed ring recess (12) on oil input channel (13) and the control valve seat recloses, high pressure fuel is introduced the control room, the power that acts on the needle-valve afterbody like this increases, and makes needle-valve close downwards, finishes whole injection process.
Fig. 3 is a kind of fundamental diagram of injector control valve parts of the prior art that is used to contrast.Have very high throttling pore plate (19) of difficulty of processing and the big orifice plate of throttling (20) in the prior art, and at the whole open period of injector valve, high pressure fuel oil duct-control room-low pressure oil duct is communicated with each other, so the energy loss of high pressure fuel is very big.
The present invention has not only cancelled the very large large and small restricting orifice of difficulty of processing, and closed the high pressure fuel that flows to the control room at the injector valve open period, therefore the energy loss that does not have high pressure fuel perhaps is significantly smaller than the energy loss of the high pressure fuel of prior art.By adjusting the lift of control spool (3), the pressure that can control control room (9) falls simultaneously, thereby the unlatching speed of control injector valve (16) reaches the purpose of controlling injection rate.
Claims (4)
1, a kind of oil thrower of Co-rail system that is used for internal-combustion engine, control valve parts wherein mainly comprise electromagnetic coil parts (1), solenoid valve spring (2), control spool (3), control valve seat (4), oil injector body (5), control piston (7), and its major character is:
A. control sealing cone (15) is arranged on the spool (3), axially oil duct (10), circumferentially oil input channel (13), circumferential back oil road (14); B., oil input channel (11) and oil-feed ring recess (12) are arranged on the control valve seat (4).
2, the oil thrower of Co-rail system that is used for internal-combustion engine that requires according to right 1 can have circumferential back oil road (14) on the control spool (3) of control valve parts wherein, also can not have circumferential back oil road (14).
3, the oil thrower of Co-rail system that is used for internal-combustion engine that requires according to right 1 during the control spool (3) of control valve parts wherein upwardly opens, cuts off the high pressure fuel that leads to control room (9).
4, the oil thrower of Co-rail system that is used for internal-combustion engine that requires according to right 1, the lift that the control spool (3) of control valve parts wherein upwardly opens can free adjusting, reach the unlatching speed of needed adjusting injector valve (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510067151XA CN100497929C (en) | 2005-04-21 | 2005-04-21 | Oil thrower of Co-rail system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510067151XA CN100497929C (en) | 2005-04-21 | 2005-04-21 | Oil thrower of Co-rail system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1854499A true CN1854499A (en) | 2006-11-01 |
| CN100497929C CN100497929C (en) | 2009-06-10 |
Family
ID=37194892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200510067151XA Active CN100497929C (en) | 2005-04-21 | 2005-04-21 | Oil thrower of Co-rail system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100497929C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102811861A (en) * | 2010-03-30 | 2012-12-05 | 爱克发印艺公司 | System and method for digital creation of a print master using a multiple printhead unit |
| CN106609719A (en) * | 2016-12-31 | 2017-05-03 | 南岳电控（衡阳）工业技术股份有限公司 | Fuel injector for high-pressure common rail fuel injection system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102230435B (en) * | 2011-06-14 | 2012-07-11 | 常州博瑞油泵油嘴有限公司 | Plane opening and closing type diesel engine high-pressure common rail oil sprayer |
-
2005
- 2005-04-21 CN CNB200510067151XA patent/CN100497929C/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102811861A (en) * | 2010-03-30 | 2012-12-05 | 爱克发印艺公司 | System and method for digital creation of a print master using a multiple printhead unit |
| CN106609719A (en) * | 2016-12-31 | 2017-05-03 | 南岳电控（衡阳）工业技术股份有限公司 | Fuel injector for high-pressure common rail fuel injection system |
| CN106609719B (en) * | 2016-12-31 | 2022-05-10 | 南岳电控（衡阳）工业技术股份有限公司 | Oil sprayer for high-pressure common rail fuel injection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100497929C (en) | 2009-06-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA FAW CO., LTD. Free format text: FORMER OWNER: WUXI INST. OF OIL PUMP INJECTOR Effective date: 20121205 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 214063 WUXI, JIANGSU PROVINCE TO: 130011 CHANGCHUN, JILIN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121205 Address after: 130011 Changchun Province, West New Economic and Technological Development Zone, Dongfeng Street, No. 2259, No. Patentee after: China FAW Group Corporation Patentee after: Shanghai Jiao Tong University Address before: 214063 Jiangsu city of Wuxi province Qian Rong Lu No. 15 Patentee before: Wuxi Inst. of Oil Pump Injector Patentee before: Shanghai Jiao Tong University |