CN101649796B - Zero-backpressure electronically-controlled diesel injector driven by magnetostrictive component - Google Patents
Zero-backpressure electronically-controlled diesel injector driven by magnetostrictive component Download PDFInfo
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- CN101649796B CN101649796B CN 200810073747 CN200810073747A CN101649796B CN 101649796 B CN101649796 B CN 101649796B CN 200810073747 CN200810073747 CN 200810073747 CN 200810073747 A CN200810073747 A CN 200810073747A CN 101649796 B CN101649796 B CN 101649796B
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Abstract
The invention discloses a zero-backpressure electronically-controlled diesel injector driven by a magnetostrictive component, which comprises a diesel injector shell provided with a diesel inlet passage and a diesel return passage, a nut cap, a magnetostrictive actuator, a zero-backpressure two-position three-way valve, a lock nut, an adjusting shim, a transition block, a return spring, a pressure spring and injection nozzle matching parts. The return spring, the transition block, the zero-backpressure two-position three-way valve, the adjusting shim, the lock nut, and the magnetostrictive actuator are orderly arranged in the diesel injector shell along the axial direction. The pressure spring and the injection nozzle matching parts are orderly arranged in the nut cap. The upper end surface and the lower end surface of the diesel injector shell, the two end surfaces of the transition block, the two end surfaces of the zero-backpressure two-position three-way valve, the two end surfaces of the adjusting shim and the lower end surface of the magnetostrictive actuator are high flatness plane; and the end surfaces of the components are connected tightly with one another to form a seal. Thus, a mechanism of which the magnetostrictive actuator controls the axial movement of a valve needle of an injection nozzle of the zero-backpressure two-position three-way valve under high-pressure diesel condition is formed. The diesel injector can realize more precise and high-frequency high pressure diesel injection.
Description
Technical field:
The present invention relates to the oil sprayer that a kind of electric-control diesel engine fuel injection system uses, particularly use a kind of electric-controlled diesel oil fuel oil injector that is driven by magnetostriction element of joint-track type electronic fuel injection technology.
Background technique:
At present, the fuel oil supply system of common rail electric-controlling diesel engine adopts electromagnetic injector that high-pressure diesel is sprayed into cylinder, because induction reactance is to a certain degree arranged during the work of the electromagnetic coil of electromagnetic fuel injector, be difficult to respond the requirement of higher injection frequency, limited diesel engine to lower oil consumption, discharging more cleaning, more low noise direction develops, and, the two position three-way valve that uses in the oil injecting nozzle of electric-controlled fuel injector, exist back pressure to produce bigger active force, need bigger control force to control.
Summary of the invention:
The object of the invention is to provide a kind of Zero-backpressure electronically-controlled diesel injector that is driven by magnetostriction element, this oil sprayer adopts magnetic telescopic driver and two-position three-way valve without back pressure, under less control force, can make diesel engine realize that in very of short duration injection time pre-spray for several times adds the oil spout of main jet, noise, oil consumption, the discharging of diesel engine, every technical order of output power are improved, to solve the problems referred to above that existing electromagnetic injector exists.
The technological scheme that solves its above-mentioned technical problem employing is: the Zero-backpressure electronically-controlled diesel injector that a kind of magnetostriction element drives, comprise the nozzle holder of bringing oily passage and drainback passage into, nut sleeve, magnetic telescopic driver, two-position three-way valve without back pressure, locking nut, adjust pad, transition block, return spring, pressure spring, injector nozzle matching parts and needle, return spring is installed in nozzle holder vertically successively in proper order, transition block, two-position three-way valve without back pressure, adjust pad, locking nut, magnetic telescopic driver, order setting pressure spring successively in nut sleeve, injector nozzle matching parts, the upper and lower end face of nozzle holder, transition block and two-position three-way valve without back pressure and the both ends of the surface of adjusting pad, the magnetic telescopic driver lower end surface all is high planeness planes, each part end face close proximity, form sealing, constituted the axially movable mechanism of oil nozzle needle that under the high-pressure diesel state, is controlled two-position three-way valve without back pressure by magnetic telescopic driver.
Because adopt technique scheme, the present invention has following beneficial effect:
One, the high-pressure diesel that can realize more accurate, higher frequency sprays, and makes multi-injection be more prone to realize, thereby noise, oil consumption, the discharging of diesel engine, every technical order of output power are improved.
The present invention adopts magnetic telescopic driver, two-position three-way valve without back pressure, under the high-pressure diesel state, drive the control two-position three-way valve without back pressure by magnetic telescopic driver, reach the accurate purpose of spraying of weak electric signal control high-pressure diesel of using computer controlled system, because getting the process of magnetic elongation, degaussing recovery nature normality size, magnetostriction element can not be subjected to external interference, can respond the requirement of higher injection frequency, and two-position three-way valve without back pressure, can under little control force, move, can realize that high-pressure diesel more accurate, higher frequency sprays.
Two, scientific structure, simple, reliable, processing and fabricating is convenient, and cost is low.
The present invention adopts return spring is installed in nozzle holder vertically successively in proper order, transition block, two-position three-way valve without back pressure, adjust pad, locking nut, magnetic telescopic driver, order setting pressure spring successively in nut sleeve, injector nozzle matching parts, the upper and lower end face of nozzle holder, transition block and two-position three-way valve without back pressure and the both ends of the surface of adjusting pad, the magnetic telescopic driver lower end surface all is high planeness planes, each part end face close proximity, form sealing, constituted the axially movable mechanism of oil nozzle needle that under the high-pressure diesel state, is controlled two-position three-way valve without back pressure by magnetic telescopic driver, it is simple in structure, drive the control two-position three-way valve without back pressure by magnetic telescopic driver, can realize that accurate high frequency high-pressure diesel sprays, and has reduced cost and the manufacture difficulty of diesel oil automatical control system critical component electric-controlled fuel injector.
Below, the technical characteristics of the Zero-backpressure electronically-controlled diesel injector that a kind of magnetostriction element of the present invention is driven is described further by reference to the accompanying drawings.
Description of drawings:
Fig. 1-1～Fig. 1-4: Zero-backpressure electronically-controlled diesel injector structure and working state schematic representation that a kind of magnetostriction element drives:
Fig. 1-1: the main sectional view, Fig. 1-2 looked: left view,
Fig. 1-3: normality---not oil spout state, Fig. 1-4: mangneto element elongation---oil spout state;
Fig. 2: magnetic telescopic driver structural representation;
Fig. 3～Fig. 3-43: the overall structure of two-position three-way valve without back pressure and critical piece structural representation:
Fig. 3: the overall structure schematic representation of two-position three-way valve without back pressure,
Fig. 3-1: control piston structure schematic representation,
Fig. 3-2: control valve upper body structural representation,
Fig. 3-31: adjust the block structure worm's eye view, Fig. 3-32 adjusts the block structure master and looks sectional view,
The A-A sectional view of Fig. 3-33: Fig. 3-31;
Fig. 3-41: body structure worm's eye view under the control valve, Fig. 3-42: the body structure master looks sectional view under the control valve,
The B-B sectional view of Fig. 3-43: Fig. 3-41.
Fig. 4-1～Fig. 4-2: shell construction schematic representation:
Fig. 4-1: the main sectional view, Fig. 4-2: left view looked;
Fig. 5: locking nut structural representation;
Fig. 6: spacer chip architecture schematic representation;
Fig. 7-1～Fig. 7-2: transition block structural representation:
Fig. 7-1: the main sectional view, Fig. 7-2: worm's eye view looked.
Among Fig. 1-1～Fig. 1-4:
1-plastic casing wiring terminal, 2-magnetic telescopic driver, 3-locking nut, 4-adjust pad, 5-two-position three-way valve without back pressure, 6-nozzle holder, 7-transition block, 8-return spring, 9-pressure spring, 10-injector nozzle matching parts, 11-needle, 12-nut sleeve, 13-high-pressure oil pipe joint;
Among Fig. 2:
21-magnetic telescopic driver end cap, 22-magnetic materials flexible rod, 23-magnetic telescopic driver coil, 24-magnetic telescopic driver coil holder, 25-magnetic telescopic driver push rod, 26-magnetic telescopic driver loaded spring, 27-magnetic telescopic driver housing;
Among Fig. 3～Fig. 3-43:
51-controls plunger, the last small axle diameter end of 511-, 512-small axle diameter section I, 513-large-diameter boss, the conical surface of 5131-large-diameter boss upper end, the conical surface of 5132-large-diameter boss lower end, 514-small axle diameter section II, small axle diameter end under the 515-;
52-control valve upper body, 521-control valve upper body center hole, the conical surface of center hole hole wall lower end, 5211-control valve upper body, the drainback passage-working solution outlet passage III of 522-band bending;
53-adjusts piece, and 531-adjusts piece center hole, 532-through hole, 533-undercut groove;
54-control valve lower body, 541-control valve lower body center hole, the conical surface of 5411-control valve lower body center hole hole wall upper end, 542-clear opening-working solution passage II, 543-inclined hole-working solution passage I, 544-spill port.
The oil sprayer oil inlet passage---67,65,73,543,101,542,72,63,
The oil sprayer drainback passage---63,542,72,544;
All the other labels are seen described in the literary composition.
Embodiment:
Embodiment one:
The Zero-backpressure electronically-controlled diesel injector that a kind of magnetostriction element drives, comprise the nozzle holder 6 of bringing oily passage and drainback passage into, nut sleeve 12, magnetic telescopic driver 2, two-position three-way valve without back pressure 5, locking nut 3, adjust pad 4, transition block 7, return spring 8, pressure spring 9 and injector nozzle matching parts 10, return spring 8 is installed in nozzle holder 6 vertically successively in proper order, transition block 7, two-position three-way valve without back pressure 5, adjust pad 4, locking nut 3, magnetic telescopic driver 2, order setting pressure spring 9 and injector nozzle matching parts 10 successively in nut sleeve 12, the upper and lower end face of nozzle holder 6, transition block 7 and two-position three-way valve without back pressure 5 and the both ends of the surface of adjusting pad 4, the lower end surface of magnetic telescopic driver 2 all is high planeness planes, each part end face close proximity, form sealing, constituted the axially movable mechanism of oil nozzle needle that under the high-pressure diesel state, is controlled two-position three-way valve without back pressure by magnetic telescopic driver.
Described magnetic telescopic driver 2 is by the loaded spring 26 that is installed in turn in the magnetic telescopic driver housing 27, push rod 25, coil 23 on the coil holder 24, magnetic materials flexible rod 22, end cap 21 is formed (referring to Fig. 2), changed in effect lower edge, the magnetic field magnetic direction size that coil 23 provides by flexible rod 22, thereby driving push rod 25 moves, loaded spring 26 is that the characteristic according to magnetic materials provides precompression, make the dimensional changes of push rod 25 be linear, change magnetic intensity by the electric current that changes coil 23 and control flexible rod 22 dimensional changes, realize high precision displacement control.
Described two-position three-way valve without back pressure 5 comprises and has the control valve lower body 54 of bringing oily passage and drainback passage into, control plunger 51 on it, has the control valve upper body 52 of drainback passage on it and adjust piece 53 (referring to Fig. 3);
Described control plunger 51 is not isometrical shaft-like parts that the stage casing has 1 large-diameter boss 513, upper and lower end high-axiality, at middle part large-diameter boss and last small axle diameter end 511, between the small axle diameter end 515 inferior small axle diameter section I 512, inferior small axle diameter section II 514 are arranged respectively down, be circular cone transition (referring to Fig. 3-1) between the different diameter of axle sections;
Described control valve lower body 54 is the cylindrical shape parts that have center hole, have on it and run through control valve lower body upper and lower end face and the clear opening 542 parallel with control valve lower body center hole 541 forms working solution passage II as the oil-feed of oil sprayer, drainback passage, opposite side has the working solution passage I of inclined hole 543 formation that communicate with control valve lower body center hole 541 as the oil inlet passage of oil sprayer, control valve lower body center hole 541 is formed even part with the following small axle diameter end 515 of control plunger 1, and control valve lower body center hole hole wall upper end is conical surface 5411 (referring to Fig. 3-41～Fig. 3-43);
Described adjustment piece 53 is to have the thin column shape part of adjusting piece center hole 531, have on it to run through and adjust piece 53 upper and lower end faces and the through hole 532 parallel with adjusting piece center hole 531, adjusting piece 53 end faces adjacent with control valve lower body 54 upper-end surfaces has a undercut groove 533, this undercut groove 533 from adjust piece center hole 531 on the control valve lower body 54 clear opening 542 extensions and be communicated with (referring to Fig. 3-31～Fig. 3-33) as the oil-feed of oil sprayer, the working solution passage II of drainback passage;
Described control valve upper body 52 is 1 cylindrical shape part that have center hole, the one side has the drainback passage 522 of a band bending that is connected with control valve upper body center hole, control valve upper body center hole 521 is formed even part with the last small axle diameter end 511 of control plunger 51, and center hole hole wall lower end, control valve upper body is conical surface 5211 (referring to figure Fig. 3-2);
The both ends of the surface that have control valve lower body 54, adjustment piece 53 and the control valve upper body 52 of center hole are high planeness planes, press each part end face close proximity of order, the formation sealing of control valve lower body 54, adjustment piece 53 and control valve upper body 52 from the bottom up, be conical surface on center hole hole wall lower end, control valve upper body and the control valve lower body center hole hole wall, control plunger 51 passes control valve lower body 54, adjusts the center hole of piece 53 and control valve upper body 52 and coaxality installation with it, also can move (referring to Fig. 3) flexibly in center hole.
Described nozzle holder 6 is to comprise bigger diameter end section 61, the cylindrical body of not isometrical 3 grades of ladders of stage casing 62 and miner diameter end section 64, outside thread is arranged at bigger diameter end section 61 tops, there are one 2 step-shaped blind holes 611 at the center, the big end of this step-shaped blind hole 611 is used for laying two-position three-way valve without back pressure, the both sides of step-shaped blind hole 611 bottoms have high pressure oil inlet hole 65 and the oilhole 63 that runs through housing stage casing and miner diameter end section respectively, there is a horizontal ledge 66 in bigger diameter end section 61 left sides, there is a stepped shaft blind hole 661 at its center, the big end of this step-shaped blind hole 661 is connected with the high-pressure oil pipe joint screw thread, the aperture section of step-shaped blind hole 661 is that the high pressure oil oil inlet passage is communicated with high pressure oil inlet hole 65, and outside thread is arranged at miner diameter end section 64 bottoms, the center also has one to be used for laying the blind hole 641 of pressure spring (referring to Fig. 4-1, Fig. 4-2).
Described transition block 7 has transition block oil inlet hole 73, transition block oilhole 72 for the thin column of band center hole 71 on it, it has a undercut groove that is communicated with center hole 74 as drainback passage with two-position three-way valve without back pressure 5 lower end surface connecting places.
Oil sprayer high pressure oil inlet passage is made up of the oil inlet hole 101 of the transition block oil inlet hole 73 on the oil inlet hole 65 of nozzle holder and oilhole 63, the transition block and transition block oilhole 72, two-position three-way valve without back pressure 5 control valve lower body working solution passage I 543 and working solution passage II, injector nozzle matching parts.
Drainback passage is made up of with the undercut groove 533 of control valve lower body 54 upper-end surface adjacent faces oilhole 63, the adjustment piece 53 of the clear opening 542 on the two-position three-way valve without back pressure 5 control valve lower bodies, nozzle holder.
Working procedure is as follows:
After connecting high-pressure diesel, high-pressure diesel enters oil inlet hole 65 and oilhole 63 by nozzle holder from high-pressure oil pipe passage 67, transition block oil inlet hole 73 on the transition block and transition block oilhole 72, two-position three-way valve without back pressure 5 control valve lower body working solution passage I 543 and working solution passage II, the oil inlet passage that the oil inlet hole 101 of injector nozzle matching parts is formed, wherein one the tunnel arrive the pressure chamber of injector nozzle matching parts and the needle valve seat of oil nozzle, another road is through the oil inlet hole 65 at housing middle part, transition block oilhole 73 on the transition block enters two-position three-way valve without back pressure 5, because when magnetostriction element is in no magnetic pumping state, the length that magnetostriction bar 22 keeps under the nature, two-position three-way valve without back pressure 5 is under return spring 8 effects, move to the conical surface 5211 drive fit closures of conical surface 5131 with center, 52 lower end, the control valve upper body hole wall of control plunger 51 large-diameter boss 513 upper ends on its control plunger 51, high-pressure diesel is by the working solution passage II on the control valve lower body 54, working solution passage I connects, the oil duct II 542 of high-pressure diesel from the two-position three-way valve without back pressure 54, transition block oilhole 72 on the transition block, oilhole 63 on the housing arrives the top of needle-valve, not oil spout of oil sprayer is in normally open (referring to Fig. 1-3);
When the magnetostriction element excited target, magnetostriction bar 22 axial elongations, control plunger 51 is displaced downwardly to the conical surface 5411 drive fit closures of conical surface 5132 with center, the control valve lower body 54 upper end hole wall of its large-diameter boss 513 lower ends, high pressure oil connects by the drainback passage 522 of the band bending that the working solution passage II on the control valve lower body 54 and the control valve upper body center hole on the control valve upper body 2 are connected, oil nozzle needle 11 is by high-pressure diesel jack-up, high-pressure diesel sprays between oil nozzle needle 10 and nozzle valve seat, oil sprayer oil spout (referring to Fig. 1-4).
When magnetostriction element 22 lost excitation, magnetostriction bar 22 axially shortened and returns to normal, and is closed, and the pressure of injector nozzle matching parts rises rapidly, and oil spout stops.
Claims (1)
1. the Zero-backpressure electronically-controlled diesel injector that drives of a magnetostriction element, comprise the nozzle holder of bringing oily passage and drainback passage into, nut sleeve, magnetic telescopic driver, two position three-way valve, locking nut, adjust pad, transition block, return spring, pressure spring and injector nozzle matching parts, it is characterized in that: described two position three-way valve is two-position three-way valve without back pressure, return spring is installed in nozzle holder vertically successively in proper order, transition block, two-position three-way valve without back pressure, adjust pad, locking nut, magnetic telescopic driver, order setting pressure spring successively in nut sleeve, injector nozzle matching parts, the upper and lower end face of nozzle holder, the both ends of the surface of transition block and the both ends of the surface of two-position three-way valve without back pressure, both ends of the surface and the magnetic telescopic driver lower end surface of adjusting pad all are high planeness planes, each part end face close proximity, form sealing, constituted the axially movable mechanism of oil nozzle needle that under the high-pressure diesel state, is controlled two-position three-way valve without back pressure by magnetic telescopic driver;
Described two-position three-way valve without back pressure comprises and has passage I on it, the control valve lower body of passage II and drainback passage, the control plunger, have the control valve upper body of drainback passage on it and adjust piece, described control plunger (51) is that the stage casing has 1 large-diameter boss (513), the not isometrical shaft-like part that upper and lower end is coaxial, between middle part large-diameter boss and last small axle diameter end (511), inferior small axle diameter section I (512) is arranged, between middle part large-diameter boss and following small axle diameter end (515), inferior small axle diameter section II (514) is arranged, be the circular cone transition between the different diameter of axle sections, control valve lower body (54), adjust piece (53) and control valve upper body (52) and all have center hole, the both ends of the surface of control valve lower body (54), adjusting the both ends of the surface of piece (53) and the both ends of the surface of control valve upper body (52) all is high planeness plane, press control valve lower body (54) from the bottom up, adjust each part end face close proximity of order of piece (53) and control valve upper body (52), form sealing, center hole hole wall lower end, control valve upper body and control valve lower body center hole hole wall upper end are conical surface, control plunger (51) passes control valve lower body (54), adjust center hole and the control valve lower body (54) of piece (53) and control valve upper body (52), adjust piece (53) and the coaxial installation in control valve upper body (52), and can be in control valve lower body (54), the center hole of adjusting piece (53) and control valve upper body (52) is interior mobile flexibly.
Described magnetic telescopic driver by be installed in loaded spring in the magnetic telescopic driver housing, push rod in turn, coil, magnetic materials flexible rod and end cap on coil holder formed, changed in effect lower edge, the magnetic field magnetic direction size that coil provides by flexible rod, move thereby drive push rod, change magnetic intensity by the electric current that changes coil and control the variation of flexible rod size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810073747 CN101649796B (en) | 2008-08-16 | 2008-08-16 | Zero-backpressure electronically-controlled diesel injector driven by magnetostrictive component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810073747 CN101649796B (en) | 2008-08-16 | 2008-08-16 | Zero-backpressure electronically-controlled diesel injector driven by magnetostrictive component |
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| Publication Number | Publication Date |
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| CN101649796A CN101649796A (en) | 2010-02-17 |
| CN101649796B true CN101649796B (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200810073747 Expired - Fee Related CN101649796B (en) | 2008-08-16 | 2008-08-16 | Zero-backpressure electronically-controlled diesel injector driven by magnetostrictive component |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103603756B (en) * | 2013-12-10 | 2015-12-16 | 广西壮族自治区汽车拖拉机研究所 | A kind of Zero-backpressure electronically-controlled diesel injector of Electromagnetic Drive |
| CN105065164B (en) * | 2015-08-06 | 2017-10-31 | 中国北方发动机研究所(天津) | A kind of guide rod structure electric-controlled fuel injector |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10140796A1 (en) * | 2001-08-20 | 2003-03-06 | Bosch Gmbh Robert | Fuel injector |
| WO2004111434A1 (en) * | 2003-06-11 | 2004-12-23 | Robert Bosch Gmbh | Injector for fuel injection systems of internal combustion engines, especially direct injection diesel engines |
| EP1519036A1 (en) * | 2003-09-26 | 2005-03-30 | Robert Bosch Gmbh | Fuel injection valve |
| CN1928348A (en) * | 2006-08-14 | 2007-03-14 | 北京美动力发动机技术有限公司 | High pressure oil pump oil and oil spray on-time electromagnetic control valve for diesel engine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201246248Y (en) * | 2008-08-16 | 2009-05-27 | 柳州福尔曼汽车电子有限公司 | Non-back pressure electric control diesel oil injector driven by magnetoconstriction element |
-
2008
- 2008-08-16 CN CN 200810073747 patent/CN101649796B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10140796A1 (en) * | 2001-08-20 | 2003-03-06 | Bosch Gmbh Robert | Fuel injector |
| WO2004111434A1 (en) * | 2003-06-11 | 2004-12-23 | Robert Bosch Gmbh | Injector for fuel injection systems of internal combustion engines, especially direct injection diesel engines |
| EP1519036A1 (en) * | 2003-09-26 | 2005-03-30 | Robert Bosch Gmbh | Fuel injection valve |
| CN1928348A (en) * | 2006-08-14 | 2007-03-14 | 北京美动力发动机技术有限公司 | High pressure oil pump oil and oil spray on-time electromagnetic control valve for diesel engine |
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