CN101798977B - Piezoelectric and electromagnetic combination double-valve device - Google Patents
Piezoelectric and electromagnetic combination double-valve device Download PDFInfo
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- CN101798977B CN101798977B CN2010101173387A CN201010117338A CN101798977B CN 101798977 B CN101798977 B CN 101798977B CN 2010101173387 A CN2010101173387 A CN 2010101173387A CN 201010117338 A CN201010117338 A CN 201010117338A CN 101798977 B CN101798977 B CN 101798977B
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- fuel oil
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- pressure
- fuel
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Abstract
The invention provides a piezoelectric and electromagnetic combination double-valve device. The device comprises an electromagnetic valve, a piezoelectric actuator and a valve body shell, wherein the electromagnetic valve and the piezoelectric actuator are arranged in the valve body shell; and the electromagnetic valve is arranged above the piezoelectric actuator. The device has the advantages of: closing and opening a fuel oil overflow control valve rapidly and establishing the pressure of the fuel oil rapidly or making the fuel oil discharge to reduce pressure due to fast action response capability; controlling the accumulated pressure of the fuel oil before injection and the opening and closing pressure of a pin valve of an fuel oil injector by controlling the action of the pin valve of the fuel oil injector to make the pin valve of the fuel oil injector opened and closed rapidly; controlling the injection pressure of the fuel oil to obtain different fuel oil injection rates and realize a plurality of fuel oil injection rules due to the fact that the opening and closing of the pin valve of the fuel oil injector is nothing to do with the injection pressure of the fuel oil; meeting the requirements on the fuel oil injection pressure and rules under different loads and working conditions of a diesel; enhancing the economic and dynamic properties of the diesel; and reducing noise and the emission of harmful substances.
Description
Technical field
The present invention relates to a kind of fuel injection apparatus, particularly relate to the fuel injection apparatus that satisfies eject request under the different operating modes of diesel engine simultaneously.
Background technique
Fuel injection system to diesel engine is realized electronic control; It is an important directions of current diesel fuel injection system development; Utilize piezo actuator or high-speed electromagnetic valve can realize accurate control to Fuel Injection Quantity for Diesel and fuel injection characteristic; Thereby reach the economic performance that improves diesel engine, improve diesel powered performance and the purpose that reduces harmful emission of diesel engine.
Traditional electric control fuel oil jet system adopts single solenoid valve or high speed piezo actuator control mode usually, though can realize optimization control to a certain extent to fuel injection quantity and fuel injection characteristic, but still have some problems.One of which, this control mode can only be implemented control action to a control valve, therefore is difficult to realize the flexible control to fuel injection characteristic and injection pressure simultaneously, is difficult to satisfy diesel engine requirement to fuel injection characteristic under different operating modes.Its two, the action response speed of the high-speed electromagnetic valve that this control mode adopted is still relatively slow, is difficult to realize multi-injection and variable fuel injection characteristic.Its three, except common rail fuel combustion system, the fuel-injection pressure and the diesel engine speed of this control mode are closely related, fuel-injection pressure is lower under the slow-speed of revolution, atomization quality is poor, combustion process is difficult to be optimized.They are four years old; The opening and closing and the fuel-injection pressure of oil-fuel injector needle-valve are closely related; Under single electromagnetic valve mode, the unlatching of uncontrollable oil-fuel injector needle-valve and closing speed are especially when slow-speed of revolution fuel-injection pressure is low; The opening and closing speed of needle-valve can be slower, is difficult to accomplish the task of multi-injection.
Summary of the invention
The invention reside in provides a kind of and can control fast, accurately Fuel Injection Quantity for Diesel and fuel injection characteristic, to reach the piezoelectricity and the electromagnetic combination double-valve device of the purpose that improves engine fuel economy, power character and reduction noxious emission.
The objective of the invention is to realize like this:
Piezoelectricity of the present invention and electromagnetic combination double-valve device comprise solenoid valve, piezo actuator and valve shell, and solenoid valve 3 is installed in valve shell inside with piezo actuator 4, and solenoid valve 3 be installed in piezo actuator 4 above.
Advantage of the present invention is: can realize the control respectively to fuel overflow control valve and two control valves of injection control valve simultaneously, reach the flexible control to diesel engine fuel jetting pressure and fuel injection rate through the cooperation control to two control valves.The high-speed electromagnetic valve of this double-valve device and high speed piezo actuator all have action response ability faster, can close and open the fuel overflow control valve apace, set up fuel pressure rapidly or make the rapid earial drainage step-down of fuel oil; Through the action of control oil-fuel injector needle-valve, can control the savings pressure of fuel oil before spraying and the opening and closing pressure of oil-fuel injector needle-valve, make oil-fuel injector needle-valve can more promptly open and closure; And the unlatching of oil-fuel injector needle-valve is with closed irrelevant with fuel-injection pressure; Thereby can control fuel-injection pressure, obtain different fuel injection rates, realize multiple fuel injection characteristic; Can satisfy diesel engine in different operating modes; To the requirement of injection pressure and fuel injection characteristic, improve engine fuel economy and power character under the different load, reduce noise and reduce the noxious emission material.
Description of drawings
Fig. 1 is a general structure schematic representation of the present invention;
Fig. 2 is a high-speed electromagnetic valve structural representation of the present invention;
Fig. 3 is a hydraulic coupler structural representation of the present invention.
Embodiment
For example the present invention is done description in more detail below in conjunction with accompanying drawing:
Mode of execution 1: like Fig. 1---shown in 3, piezoelectricity of the present invention and electromagnetic combination double-valve device comprise high-speed electromagnetic valve 3, high speed piezo actuator 4 and valve shell 1,2, and high speed piezo actuator 4 is made up of piezoelectric element 5 and hydraulic coupler 6.Piezoelectric element 5 through control change piston 19 operating valve pistons 20 action and reset, with the opening and closing of control respective spray control valve, thereby realize fuel-injected is controlled flexibly.Conversion piston 19 and valve piston 20 have been installed in the hydraulic coupler 6, conversion piston 19 and Coupler housing 18 guiding of valve piston 20 by hydraulic coupler 6.The convexity of conversion piston 19 1 ends leans against on the flexible metal gasket 17 of piezoelectric element 5 front ends, and this flexible metal gasket 17 can effectively reduce the direct impact of 19 pairs of piezoelectric elements 5 of conversion piston.The spring hollow body 21 and the preloading spring 26 of on-load pressure are pressed to piezoelectric element 5 with Coupler housing 18 to quilt in advance in the hydraulic coupler 6; Spring hollow body 21 1 ends are supported on the spring hollow body limiting stopper 22; The other end is supported on the adjustment disk 25 that is stuck on the Coupler housing 18; The reloading spring power of spring hollow body 21 passes to Coupler housing 18 through this adjustment disk 25, and it is pressed to piezoelectric element 5.Adjustment disk 25 can be used for the reloading spring power and the coupling gap 30 of Regulation spring hollow body 21.Valve plate 23 has played to the seal action of fuel oil and for fuel oil circulation passage is provided; 28 pairs of valve pistons 20 of Returnning spring provide the pressure of the direction that resets; The circulation of 24 pairs of fuel oils of throttling dish produces throttling action; And itself and valve plate 23 have been connected to form a good sealing surface closely, can correspondingly reduce required sealing force thus.In an embodiment of the present invention, control valve 29 constitutes normally close valve with valve plate 23, as shown in Figure 2, and in order to the quick unlatching and the closure of control oil-fuel injector needle-valve.The magnetic circuit of the high-speed electromagnetic valve 3 among the present invention is made up of electromagnetic valve body 9, inductor coil 10 and armature 12.Spool 13 is stuck on the armature 12 by stop ring 14, constitutes the moving link of an integral body with armature 12, and is applied to the pressure of opening direction so that armature 12 resets by the Returnning spring 16 of device in electromagnetic valve body 9 blind holes.Inductor coil 10 is held and is integrated with it by coil rack 11, between itself and the electromagnetic valve body 9 with the embedding of oil resistant refractory seal glue.
Upside is a normally open valve by the overflow control valve that high-speed electromagnetic valve 3 constitutes, and during not oil spout, the overflow control valve is held open state, and fuel oil is often opened the overflow control valve by draining channel flow oil sump tank; When the energising of overflow control valve was closed, this moment, the draining passage was closed, and then fuel oil is set up injection pressure rapidly in the oil duct of injection system, prepares oil spout.When the outage of overflow control valve was opened again, the draining passage was opened once more, and high pressure fuel releases from the draining passage through the overflow control valve, and the fuel pressure in the fuel flow path of injection system descends rapidly.
The injection control valve that downside is made up of high speed piezo actuator 4 is a normally close valve, through controlling the energising unlatching and the power-failure close of this valve, can realize fuel-injected is controlled.
If injection control valve keeps the energising opening state, when the energising of overflow control valve was closed, the spring force that the opening and closing of oil-fuel injector needle-valve are then only set by the needle-valve return spring determined that the control mode of this moment and the control mode of single solenoid valve are identical.But if injection control valve keeps the power-failure close state, the pressure-loaded of fuel oil is above oil-fuel injector needle-valve at this moment, and the spring force of this pressure and needle-valve return spring is guaranteed the closure of oil-fuel injector needle-valve jointly, and this control mode is the bivalve control mode.
When the energising of overflow control valve is closed, the draining pathway closure, the fuel oil of injection system stops earial drainage, and beginning is set up injection pressure rapidly, the preparation oil spout in oil duct.If the moment that the injection control valve energising is opened lags behind the closed moment of overflow control valve energising; Then along with the increase of lag time; Fuel oil can constantly be put aside pressure in injection system;, just can neatly control time for spraying, injection pressure and the fuel injection characteristic of fuel oil the beginning of i.e. oil spout and the finish time through the unlatching and the closing moment of control injection control valve this moment.
Because the continuous savings of fuel pressure in this lag time; Therefore when the injection control valve energising is opened, higher with the cracking pressure of the oil-fuel injector needle-valve of single electromagnetic valve mode under compare, bivalve is controlled; The opening speed of needle-valve is faster; Then the injection pressure of fuel oil is higher, and injection rate is faster, and the oil atomizing quality is also better.When end of injection; Single electromagnetic valve controlling system is opened through the outage of control overflow control valve; Make the rapid earial drainage step-down of high pressure fuel, utilization simultaneously acts on the fuel pressure of oil-fuel injector needle-valve top and the acting in conjunction of oil-fuel injector needle-valve return spring drops back into one's seat needle-valve, stops oil spout.And in the bivalve control system; Then can, the overflow control valve close injection control valve before opening, because this moment, fuel oil still maintained higher injection pressure level in advance; Therefore under the acting in conjunction of fuel pressure and oil-fuel injector needle-valve return spring; Higher needle-valve closing pressure can be produced, thereby the closing velocity of needle-valve, oil-break rapidly can be accelerated.
When realizing the rectangle fuel injection rate; The overflow control valve is closed before the injection control valve energising is opened, and will put aside higher fuel pressure this moment in injection system, and the more single electromagnetic valve mode of the cracking pressure of needle-valve is higher; Therefore the opening speed of needle-valve can be faster; Injection pressure is higher, and injection rate is faster, and the oil atomizing quality is also better.When end of injection; Before the overflow control valve is opened, close injection control valve earlier since this moment fuel oil still pressure maintain higher level; Therefore under the acting in conjunction of fuel pressure and oil-fuel injector needle-valve return spring; Can produce higher needle-valve closing pressure, accelerate the closing velocity of needle-valve, rapidly oil-break.Because the unlatching closing speed of oil-fuel injector needle-valve and the raising of injection rate in having the control system of double-valve device, can be easy to realize the rectangle fuel injection rate.
When realizing multi-injection; Regulate the closure of overflow control valve and the time that injection control valve is opened by electric control system controls; Make fuel pressure put aside suitable scope; Then carry out and repeatedly open and closed action, to reach the purpose that realizes the fuel oil multi-injection through high speed piezo actuator 4 control injection control valves.
Equally, the cooperation control through overflow control valve and injection control valve also can realize the boot-shaped fuel injection rate at an easy rate.
Claims (1)
1. piezoelectricity and electromagnetic combination double-valve device; It is characterized in that: comprise solenoid valve, piezo actuator and valve shell; Solenoid valve (3) and piezo actuator (4) are installed in valve shell inside; And solenoid valve (3) be installed in piezo actuator (4) above; Described solenoid valve comprises electromagnetic valve body (9), inductor coil (10), coil rack (11), armature (12), spool (13), stop ring (14), Returnning spring (16), and spool (13) is stuck on the armature (12) by stop ring (14), and spool (13) and armature (12) constitute the moving link of an integral body; The pressure that Returnning spring (16) in electromagnetic valve body (9) blind hole applies to opening direction resets armature (12); Inductor coil (10) is held by coil rack (11) and integrates with coil rack (11), and piezo actuator (4) comprises piezoelectric element (5) and hydraulic coupler (6), and piezoelectric element (5) is installed on the hydraulic coupler (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101173387A CN101798977B (en) | 2010-03-04 | 2010-03-04 | Piezoelectric and electromagnetic combination double-valve device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101173387A CN101798977B (en) | 2010-03-04 | 2010-03-04 | Piezoelectric and electromagnetic combination double-valve device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101798977A CN101798977A (en) | 2010-08-11 |
| CN101798977B true CN101798977B (en) | 2012-02-01 |
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| CN2010101173387A Expired - Fee Related CN101798977B (en) | 2010-03-04 | 2010-03-04 | Piezoelectric and electromagnetic combination double-valve device |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374085A (en) * | 2011-11-23 | 2012-03-14 | 哈尔滨工程大学 | Low oil return type piezoelectric control fuel injector |
| CN103195626B (en) * | 2013-03-26 | 2015-03-11 | 哈尔滨工程大学 | Redundancy electromagnet and piezoelectricity combined bivalve device |
| CN103244321B (en) * | 2013-04-28 | 2015-03-11 | 哈尔滨工程大学 | Dual-fuel dual-piezoelectric control type injector |
| CN103244322B (en) * | 2013-04-28 | 2015-03-11 | 哈尔滨工程大学 | Dual-fuel electromagnetic and piezoelectric control type injector |
| CN104018964B (en) * | 2014-05-29 | 2016-05-04 | 哈尔滨工程大学 | Pressure accumulation current-limiting type piezoelectric control fuel injector |
| CN105257815A (en) * | 2015-11-09 | 2016-01-20 | 中投仙能科技（苏州）有限公司 | Gearbox adopting electromagnetic valve and stirring piece type gear shifting manner |
| CN105351115B (en) * | 2015-11-27 | 2019-04-23 | 哈尔滨工程大学 | No leakage voltage control standard fuel gas ejecting device |
| CN105756820B (en) * | 2016-04-21 | 2018-04-17 | 哈尔滨工程大学 | Combined type is pressurized the non pressurized piezoelectricity jet hybrid fuel jet device of electromagnetic fuel injection |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| GB9820033D0 (en) * | 1998-09-16 | 1998-11-04 | Lucas Ind Plc | Fuel injector |
| DE10148603B4 (en) * | 2001-10-02 | 2004-02-19 | Siemens Ag | Actuator unit with at least two actuator elements |
| FR2885060A1 (en) * | 2005-04-29 | 2006-11-03 | Peugeot Citroen Automobiles Sa | ACTIVE CONTROL DEVICE FOR COMPENSATING VIBRATION GENERATING EFFORTS AND MOTOR VEHICLE COMPRISING SUCH A DEVICE |
| CN101592105A (en) * | 2009-06-19 | 2009-12-02 | 同济大学 | Intelligent fuel injector and control thereof, using method |
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| CN101798977A (en) | 2010-08-11 |
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Granted publication date: 20120201 Termination date: 20180304 |