CN2200058Y - Electric control high voltage injector for diesel engine - Google Patents
Electric control high voltage injector for diesel engine Download PDFInfo
- Publication number
- CN2200058Y CN2200058Y CN94202432U CN94202432U CN2200058Y CN 2200058 Y CN2200058 Y CN 2200058Y CN 94202432 U CN94202432 U CN 94202432U CN 94202432 U CN94202432 U CN 94202432U CN 2200058 Y CN2200058 Y CN 2200058Y
- Authority
- CN
- China
- Prior art keywords
- oil
- pressure
- diesel engine
- electric control
- injection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model relates to an electric control high pressure injector for a diesel engine, belonging to a component which can realize high pressure oil injection in an electric control oil supply system. The upper part of the oil injector is provided with a working oil inlet, an oil drain, an oil pressing port and the corresponding oil passages, and a large and a small piston structures are arranged among the three oil passages utilizing the hydraulic amplification principle. A damping unit for adjusting the motion of a needle valve is arranged at the upper part of the needle valve in order to improve the oil-injection rate. The utility model can enhance the oil-injection pressure, and can realize the high-pressure running that changing the injection pressure of the diesel engine under different operating conditions in the electric control system, and the diesel engine is in optimum state all the time. The utility model has the advantages of simple structure, small volume, easy fabrication and convenient installation.
Description
The utility model is the parts of fuel supply system for diesel engine system, is the oil sprayer of realizing high pressure fuel injector in the electronic control injection system.
Along with progress of science and technology, development of electronic technology particularly, and, make electronic control technology more extensive in the application of internal-combustion engine to the requirements at the higher level of the exhaust index of the performance of internal-combustion engine.For economy and the emission performance requirement that obtains, improve injection pressure, present automatically controlled oil supply system is to adopt to add a final controlling element on the basis of crude oil pump oil nozzle mostly, under the control of electrical signal, adjust the gear pole and the cam phase of oil pump, to reach the purpose of control course of injection, and the structure of former oil sprayer is constant.For example " internal-combustion engine engineering " the 9th 1988 the 1st phases of volume are published, and to be shown " the diesel engine nozzle is the research of micro computer optimization timing control system regularly " by Zhang Yuhua and Hu Guodong be exactly the final controlling element that adopts microcomputerized control, realizing the technology of best injection timing, and existing fuel injector structure is not added change.The injection pressure of this class automatical control system depends primarily on the pump oil pressure of oil pump.
The purpose of this utility model is for improving the injection pressure of diesel engine, and then realizes microcomputer control improving the diesel engine fuel oil atomizing, fuel saving and improve its exhaust index, and a kind of high pressure fuel injector that is used for automatical control system is provided.
Common oil sprayer only is to lift under the control from the fuel oil of oil pump or cut out needle-valve and realize injection process.And main points of the present utility model be in oil injector body inside except that having assorted valve, on the top of its oil sprayer, be respectively equipped with working oil import, drain tap and three hydraulic fluid ports of pressure hydraulic fluid port and corresponding oil duct; The principle of utilizing hydraulic pressure to amplify simultaneously, with oil duct that three hydraulic fluid ports communicate between be provided with large and small piston structure to improve injection pressure; Also be provided with the adjustment needle valve movement on the top of the inside of oil sprayer needle-valve and improve the damping unit of fuel injection characteristic, for example various structures such as damping plate or spring with damping regulatory function.
Accompanying drawing is diesel electric-controlled high pressure fuel injector structural representation.
Among the figure, the 1-big piston, the 2-small piston, the 3-damping plate, the 4-needle-valve, 5-non-return body, A-presses hydraulic fluid port, the import of B-working oil, C-drain tap.
As shown in the figure, when A mouth oil pressure was zero, the B mouth had added the work fuel oil from the oil circuit of changement in the automatical control system, and this moment, oil pressure equaled the low pressure oil circuit.The work fuel oil enters high-voltage oil cavity, and piston 1,2 is simultaneously up; The commutation of electric control reversing mechanism, B mouth oil pressure is zero, the A mouth has added compressed oil (oil pressure is still pressed for the low pressure oil road binders), the effect of one-way valve in B mouth oil duct at this moment, oil circuit can not reflux, because the boosting of large and small piston 1 and 2, the fuel oil in the high-voltage oil cavity is pressurized to: oil pressure=piston magnifiation in depth * low pressure oil road binders is pressed.For example designed hydraulic pressure magnifiation in depth is 13, and generally when 100～200bar, the injection pressure of oil sprayer then can reach between 1300～2600bar the low pressure oil pressure.When the commutation of electric control reversing mechanism is zero for A mouth oil pressure, since pressure imbalance, piston stroking upward, and hyperbaric chamber pressure descends rapidly, since non-return body 5 act on around it and bottom oil pocket oil pressure still keeps high pressure, this moment is owing to valve 4 pressures imbalance is lifted the oil sprayer commencement of fuel injection.As seen from the figure, the setting of needle-valve 4 top damping units 3, the circulation area that makes needle-valve can not lift its needle-valve head immediately under damping function is not to increase suddenly, but be opened to standard-sized sheet gradually, the setting of this damping unit, changed original dQ/dt injection rate, met diesel engine more and optimize service condition, thereby improved injection process.
The said damping unit of the utility model can be a damping plate, perhaps has the damping plate of the damping hole of different distributions, or spring, or the combination of mentioned kind etc. has the structure of damping regulatory function.
The utility model, the Electrocontrolled high-pressure oil sprayer, the injection pressure height, it reaches as high as more than the 1500bar.This Electrocontrolled high-pressure oil sprayer be except realizing high pressure fuel injector, realizes also can realizing the operation of the variable maximum fuel injection pressure under the different operating modes outside the advance angle, fuel injection quantity may command in the common automatically controlled oil-fired system.Not only can be by changing hydraulic pressure amplification recently change maximum fuel injection pressure, and when diesel engine moves, can regulate maximum fuel injection pressure at an easy rate by the oil pressure that changes the low pressure oil circuit, thereby can under different operating modes, become the high-voltage operation that spray is pressed, make motor be in optimum state all the time, and then can easily realize the supporting use of all-electric control system.The utility model is simple in structure in addition, and volume is little, makes easy for installationly, is the key technology that realizes electronic controlled diesel work and improve diesel engine performance.
Claims (3)
1, diesel electric-controlled high pressure fuel injector, has needle-valve in oil injector body inside, it is characterized in that being provided with working oil import, drain tap and three hydraulic fluid ports of pressure hydraulic fluid port and corresponding oil duct thereof, and between the oil circuit that three oil ducts communicate, utilize the hydraulic pressure amplification principle to be provided with the large and small piston structure that improves injection pressure on the top of oil sprayer.
2,, it is characterized in that being provided with the damping unit of adjustment needle valve movement on the top of needle-valve according to the said diesel electric-controlled high pressure fuel injector of claim 1.
3,, it is characterized in that said damping unit can be a damping plate, damping plate with holes, various structures such as spring with damping regulatory function according to claim 1 or 2 said diesel electric-controlled high pressure fuel injectors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94202432U CN2200058Y (en) | 1994-01-26 | 1994-01-26 | Electric control high voltage injector for diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94202432U CN2200058Y (en) | 1994-01-26 | 1994-01-26 | Electric control high voltage injector for diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2200058Y true CN2200058Y (en) | 1995-06-07 |
Family
ID=33822210
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94202432U Expired - Fee Related CN2200058Y (en) | 1994-01-26 | 1994-01-26 | Electric control high voltage injector for diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2200058Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396908C (en) * | 2003-04-23 | 2008-06-25 | 曼·B及W柴油机公开股份有限公司 | Device for damping the closing of an injector needle of a fuel injector |
| CN105134439A (en) * | 2015-08-14 | 2015-12-09 | 江苏科技大学 | Marine diesel engine oil injector |
-
1994
- 1994-01-26 CN CN94202432U patent/CN2200058Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396908C (en) * | 2003-04-23 | 2008-06-25 | 曼·B及W柴油机公开股份有限公司 | Device for damping the closing of an injector needle of a fuel injector |
| CN105134439A (en) * | 2015-08-14 | 2015-12-09 | 江苏科技大学 | Marine diesel engine oil injector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |