CN102400823A - Electric control oil injector of diesel engine - Google Patents
Electric control oil injector of diesel engine Download PDFInfo
- Publication number
- CN102400823A CN102400823A CN2011103514925A CN201110351492A CN102400823A CN 102400823 A CN102400823 A CN 102400823A CN 2011103514925 A CN2011103514925 A CN 2011103514925A CN 201110351492 A CN201110351492 A CN 201110351492A CN 102400823 A CN102400823 A CN 102400823A
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- oil
- pressure oil
- spool
- injector
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Abstract
The invention discloses an electric control oil injector of a diesel engine, belonging to the technical field of control for the diesel engine and comprising a mechanical oil injector. The electric control oil injector is characterized in that an oil passage of an oil injector on the mechanical oil injector is connected with an electromagnetic valve; an electromagnetic valve body of the electromagnetic valve is provided with a high-pressure oil passage and an oil leakage channel which are controlled by a valve core; the high-pressure oil passage is externally connected with a high-pressure oil pipe joint; the oil leakage channel is externally connected with an oil leakage pipe joint; and the high-pressure passage is in a three-way type, one way leads to the high-pressure oil pipe joint, another way leads to the direction of the valve core, and the third way is connected to the oil passage of the oil injector by an orifice. The electric control oil injector solves the urgent problem that how to realize electric control oil injection on the basis of the existing mechanical oil injection mode so as to improve the dynamic property and the discharge index of the existing diesel engine, and has the advantages of high response capability, high bearing capability, high control accuracy, simple structure, good universality, reliable working, long service life, low cost and convenient installation and the like.
Description
Technical field
The invention belongs to the control technique field of diesel engine, particularly a kind of electronic controlled diesel oil sprayer.
Background technique
On diesel engine, employed oil spout mode mainly contains hydraulic injection mode and electronic control injection mode at present.With machinery type control, mainly oil injector body, oil nozzle and pressure spring be made up of fully by employed oil sprayer for the injection process of hydraulic injection mode, and this oil sprayer can not be applied to electronic controlled diesel.And diesel engine using electronic control injection mode can better meet the diesel emission standard, improves performance index.The ejecting system of electric spraying diesel engine is made up of sensor, ECU (computer) and actuator's three parts.Its task is that injection system is carried out electronic control, realizes the real-time control with operating conditions of fuel injection quantity and injection timing.Adopt sensors such as rotating speed, accelerator pedal position, the oil spout moment, intake temperature, suction pressure, fuel oil temperature, cooling water temperature; The parameter that detects is in real time imported computer (ECU) simultaneously; Compare with setup parameter value that has stored or parameter collection of illustrative plates (MAP figure), deliver to final controlling element to instruction through handling the desired value of calculating according to after optimum value or the calculating.Final controlling element is according to ECU command control fuel injection quantity (control rack position or closed electromagnetic valve endurance) and injection timing (correct time, control valve opened and closed or the closed electromagnetic valve initial point); Simultaneously actuators such as exhaust gas recirculation valve, heater plug are controlled, make the diesel engine running state reach best.
Above-mentioned electric-controlling injection system structural requirement control accuracy height, complex structure, cost are higher; The general user is difficult to accept, and how to realize on the basis of existing machinery oil spout mode that electronic control injection is the urgent problem that the industry is devoted to improve existing DENG power character and exhaust index.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned existing technology; A kind of solenoid valve that is installed on the positive injector is provided; This solenoid valve changes to electric-controlled fuel injector with positive injector, and DENG power character, Economy and exhaust index are improved.
The scheme that technical solution problem of the present invention is taked is:
A kind of electronic controlled diesel oil sprayer; Comprise positive injector; It is characterized in that the oil sprayer oil duct on the described positive injector connects a solenoid valve, the electromagnetic valve body of said solenoid valve is provided with the high-pressure oil duct and the draining passage of spool control; The external high-pressure oil pipe joint of described high-pressure oil duct, the external drain mast joint of described draining passage; Described high-pressure oil duct is a Three way type, and one the tunnel leads to the high-pressure oil pipe joint, and one the tunnel leads to the spool direction, and Third Road is connected to the oil sprayer oil duct through throttle orifice.
Described solenoid valve; Be provided with the valve core housing of belt spool cover seat in its electromagnetic valve body; Have sealed faying face between valve core case that is provided with on the spool in valve core housing and the described valve core housing seat, the top and the armature of spool are connected as a single entity, and are provided with the iron core corresponding with armature in the tight cap that electromagnetic valve body connects; Described iron core is wound with electromagnetic coil outward, is provided with the return spring of conflict on armature in the described iron core inner chamber.
During the electromagnetic coil no electric circuit; Spool presses down downwards in the elastic force effect of return spring; The sealing surface of spool seat surface and valve core housing seat surface is in opening state, gets into the fuel oil in the 3-way high-pressure oil duct, flows to the low pressure oil circuit through the sealing surface earial drainage of opening to the drain mast joint; Can't set up high pressure in the high-pressure oil duct, the hydraulic injection device is in and stops the oil spout state.After the electromagnetic coil energising, because the effect of electromagnetic force, spool is pulled upwardly, and spool seat surface and valve core housing seat surface are closed, and high-pressure oil passage and low pressure oil circuit are cut off, the interior formation of high-pressure oil duct high pressure, through throttle orifice to the oil sprayer fuel feeding.After the electromagnetic coil outage, electromagnetic force disappears, and spool presses down downwards in the effect of return spring power and high pressure fuel pressure, and opens sealed seat surface, and high-pressure oil passage and low pressure oil circuit are switched on, release rapidly in the high-pressure oil duct, hydraulic injection device fuel injection termination.
A solenoid valve is installed in the present invention additional on the hydraulic injection device, valve core of the electromagnetic valve close moment, the beginning of injection of decision hydraulic injection device; The length of solenoid valve current"on"time, the oil injection duration of decision hydraulic injection device is promptly by the injection process of electromagnetic valve hydraulic injection device.It is higher to have overcome existing electric-controlling injection system structural requirement control accuracy height, complex structure, cost; The drawback that the general user is difficult to accept has solved and has realized that on the basis of existing machinery oil spout mode electronic control injection is to improve an urgent demand of existing DENG power character and exhaust index.
Characteristics such as the present invention has that response capability height, bearing capacity are high, control accuracy is high, simple in structure, versatility is good, reliable operation, long service life, cost are low, easy for installation.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1 is electromagnetic valve body, and 2 is spool, and 3 is valve core housing, and 4 is electromagnetic coil, and 5 is tight cap; 6 is iron core, and 7 is return spring, and 8 is armature, and 9 is valve core case; 10 is the valve core housing seat, and 11 is the drain mast joint, and 12 is the positive injector joint, and 13 is positive injector; 14 is throttle orifice, and 15 is the 3-way high-pressure oil duct, and 16 for high-pressure oil pipe connects, 17 oil sprayer oil ducts.
Embodiment
Provide most preferred embodiment of the present invention below in conjunction with accompanying drawing 1:
This kind electronic controlled diesel oil sprayer; Comprise positive injector 13; Oil sprayer oil duct on the described positive injector connects a solenoid valve; The electromagnetic valve body 1 of said solenoid valve is provided with the high-pressure oil duct and the draining passage of spool 2 controls, the external high-pressure oil pipe joint of described high-pressure oil duct, the external drain mast joint 11 of described draining passage; Described high-pressure oil duct is a Three way type high-pressure oil duct 15; The high-pressure oil pipe joint is led on the one of which road; One the tunnel leads to the spool direction, and Third Road is connected to the oil sprayer oil duct through the positive injector joint 12 that electromagnetic valve body 1 is provided with, and on positive injector joint 12, is provided with throttle orifice 14.
Solenoid valve; Be provided with the valve core housing of belt spool cover seat 10 in its electromagnetic valve body 1; Have sealed faying face between valve core case 9 that is provided with on the spool 2 in valve core housing and the described valve core housing seat 10, the top of spool and armature 8 are connected as a single entity, and are provided with the iron core 6 corresponding with armature in the tight cap 5 that electromagnetic valve body 1 connects; Described iron core is wound with electromagnetic coil 4 outward, is provided with the return spring 7 of conflict on armature in the described iron core inner chamber.
Electromagnetic coil 4 no electric circuits, spool 2 are pressed to the below and are opened under the pressure effect of the spring force of return spring 7 and high pressure fuel; High-pressure oil passage communicates with the low pressure oil circuit, gets into the fuel oil of 3-way high-pressure oil duct 15, through the sealed seat surface of spool 2; Flow back in the low pressure oil circuit; Can not build high pressure in the high-pressure oil passage, the 13 not oil spouts of hydraulic injection device, whole oil circuit is shown in the direction of arrow.Electromagnetic coil 4 energisings, because the effect of electromagnetic force, spool 2 is pulled upwardly closes spool seat surface and valve core housing seat surface, and high-pressure oil passage and low pressure oil circuit are cut off, and high-pressure oil passage forms high pressure, gets into hydraulic injection device 13 fuel injection beginnings through throttle orifice 14.In a single day the electric current of electromagnetic coil 4 is cut off, and under the effect of the elastic force of return spring 7 and high pressure fuel pressure, high-pressure oil passage and low pressure oil circuit are switched on, the rapid release of high-pressure oil passage, and hydraulic injection device 13 stops oil spout thereupon.The present invention just changes to electric-controlled fuel injector with positive injector 13 like this, is carried out the control command of electronic controller by solenoid valve and carries out fuel-flow control, realizes injection process is accurately controlled.
Claims (2)
1. electronic controlled diesel oil sprayer; Comprise positive injector; It is characterized in that the oil sprayer oil duct on the described positive injector connects a solenoid valve, the electromagnetic valve body of said solenoid valve is provided with the high-pressure oil duct and the draining passage of spool control; The external high-pressure oil pipe joint of described high-pressure oil duct, the external drain mast joint of described draining passage; Described high-pressure oil duct is a Three way type, and one the tunnel leads to the high-pressure oil pipe joint, and one the tunnel leads to the spool direction, and Third Road is connected to the oil sprayer oil duct through throttle orifice.
2. electronic controlled diesel oil sprayer according to claim 1; It is characterized in that; Described solenoid valve is provided with the valve core housing that belt spool overlaps seat in its electromagnetic valve body, have sealed faying face between valve core case that is provided with on the spool in valve core housing and the described valve core housing seat; The top and the armature of spool are connected as a single entity; Be provided with the iron core corresponding in the tight cap that electromagnetic valve body connects with armature, described iron core is wound with electromagnetic coil outward, is provided with the return spring of conflict on armature in the described iron core inner chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103514925A CN102400823A (en) | 2011-11-09 | 2011-11-09 | Electric control oil injector of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103514925A CN102400823A (en) | 2011-11-09 | 2011-11-09 | Electric control oil injector of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102400823A true CN102400823A (en) | 2012-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103514925A Pending CN102400823A (en) | 2011-11-09 | 2011-11-09 | Electric control oil injector of diesel engine |
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| Country | Link |
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| CN (1) | CN102400823A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022228A (en) * | 2019-12-24 | 2020-04-17 | 哈尔滨工程大学 | Double-oil-sprayer series-connection injection system and porous spray test system applying same |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1296055A2 (en) * | 2001-09-20 | 2003-03-26 | Denso Corporation | Fuel injection valve with throttle orifice plate |
| CN2761860Y (en) * | 2003-10-15 | 2006-03-01 | 中国第一汽车集团公司 | Electronic controlled oil atomizer |
| CN201255061Y (en) * | 2008-08-04 | 2009-06-10 | 北京亚新科天纬油泵油嘴股份有限公司 | High-voltage co-rail electric-controlled fuel injector |
| CN101509450A (en) * | 2009-03-20 | 2009-08-19 | 天津大学 | Common rail type electrically controlled injector |
| CN202325951U (en) * | 2011-11-09 | 2012-07-11 | 王晓燕 | Oil injector of electrically-controlled diesel engine |
-
2011
- 2011-11-09 CN CN2011103514925A patent/CN102400823A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1296055A2 (en) * | 2001-09-20 | 2003-03-26 | Denso Corporation | Fuel injection valve with throttle orifice plate |
| CN2761860Y (en) * | 2003-10-15 | 2006-03-01 | 中国第一汽车集团公司 | Electronic controlled oil atomizer |
| CN201255061Y (en) * | 2008-08-04 | 2009-06-10 | 北京亚新科天纬油泵油嘴股份有限公司 | High-voltage co-rail electric-controlled fuel injector |
| CN101509450A (en) * | 2009-03-20 | 2009-08-19 | 天津大学 | Common rail type electrically controlled injector |
| CN202325951U (en) * | 2011-11-09 | 2012-07-11 | 王晓燕 | Oil injector of electrically-controlled diesel engine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111022228A (en) * | 2019-12-24 | 2020-04-17 | 哈尔滨工程大学 | Double-oil-sprayer series-connection injection system and porous spray test system applying same |
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| PB01 | Publication | ||
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Application publication date: 20120404 |