CN103603756A - Electromagnetically driven non-backpressure electronic diesel injector - Google Patents
Electromagnetically driven non-backpressure electronic diesel injector Download PDFInfo
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- CN103603756A CN103603756A CN201310664304.3A CN201310664304A CN103603756A CN 103603756 A CN103603756 A CN 103603756A CN 201310664304 A CN201310664304 A CN 201310664304A CN 103603756 A CN103603756 A CN 103603756A
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Abstract
The invention discloses an electromagnetically driven non-backpressure electronic diesel injector comprising an injector shell, a nut sleeve, an electromagnetic driver, a non-backpressure two-position three-way valve, a locking nut, an adjusting shim, a transition block, a pressure spring and an injection nozzle matching part, wherein the injector shell is provided with a diesel inlet channel and a diesel return channel; the injector shell is internally provided with the transition block, the non-backpressure two-position three-way valve, the adjusting shim, the locking nut and the electromagnetic driver sequentially along the axial direction; the nut sleeve is internally provided with the pressure spring and the injection nozzle matching part sequentially; the upper and lower end faces of the injector shell, the transition block, the non-backpressure two-position three-way valve, two end faces of the adjusting shim and the lower end face of the electromagnetic driver are all planes with high flatness; the end faces of all the parts are tightly connected to form a sealed structure, so that a mechanism for controlling the axial movement of an injection nozzle valve needle of the non-backpressure two-position three-way valve in a high-pressure diesel state through the electromagnetic driver is formed. The injector is free of external interference in a driving process, good in high-frequency response characteristic and capable of realizing more precise and higher-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 is used, particularly use a kind of electric-controlled diesel oil fuel oil injector by Electromagnetic Drive 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, while working due to the electromagnetic coil of electromagnetic fuel injector, there is induction reactance to a certain degree, be difficult to respond the requirement of higher injection frequency, limited diesel engine to lower oil consumption, more clean, the more low noise future development of discharge, and, the two position three-way valve using in the oil nozzle of electric-controlled fuel injector, exist back pressure to produce larger active force, need larger control force to control.Based on this, the inventor has applied for a kind of product performance high conformity in 2008, and processing conditions requires relatively low, difficulty of processing is little, the oil sprayer that the electric-control diesel engine fuel injection system with low cost is used " Zero-backpressure electronically-controlled diesel injector that a kind of magnetostriction element drives, (number of patent application 200810073748.9) ", through the applicant's research recently, find " Zero-backpressure electronically-controlled diesel injector that a kind of magnetostriction element drives " also to exist: in injection process, be subject to external interference, deficiency that the high frequency response characteristic of oil sprayer is good not enough etc., the driver element performance of its electronic controlled diesel oil-fired system oil sprayer need to improve.
summary of the invention
The technical problem to be solved in the present invention is: to the inventor's number of patent application, be: the Zero-backpressure electronically-controlled diesel injector that a kind of magnetostriction element of 200810073748.9 drives makes further improvements, and a kind of good " a kind of Zero-backpressure electronically-controlled diesel injector of Electromagnetic Drive " of high frequency response characteristic that can not be subject to external interference, oil sprayer in driving process is provided; And further improve its product performance, improve its processing conditions, to solve " Zero-backpressure electronically-controlled diesel injector that a kind of magnetostriction element drives " above shortcomings part.
The technological scheme that solves its above-mentioned technical problem employing is: a kind of Zero-backpressure electronically-controlled diesel injector of Electromagnetic Drive, comprise the nozzle holder with oil inlet passage and drainback passage, nut sleeve, electromagnetic driver, two-position three-way valve without back pressure, locking nut, adjust pad, transition block, pressure spring, injector nozzle matching parts, in nozzle holder, order is installed transition block successively vertically, two-position three-way valve without back pressure, adjust pad, locking nut, electromagnetic 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, electromagnetic driver lower end surface is all high planeness planes, each part end face close proximity, form sealing, formed the axially movable mechanism of oil nozzle needle that is controlled two-position three-way valve without back pressure under high-pressure diesel state by electromagnetic driver,
Described two-position three-way valve without back pressure, comprise the control plunger that has turnover oil duct on it, on it, there is the control valve ectosome of drainback passage and control valve shaft, described control plunger is not isometrical shaft-like part, described control valve ectosome is the cylindrical body with stepped shaft through hole, described control valve shaft is that a center hole is the not isometrical shaft-like part of 3 grades of stepped shaft through holes, controlling valve shaft large-diameter section and controlling between valve shaft small axle diameter section is conical surface, the conical surface is arranged at the bottom of controlling the large end of stepped shaft through hole of valve shaft, control plunger, controlling valve shaft and control valve ectosome installs from bottom to up successively, control plunger put into control the large end of valve shaft stepped shaft through hole and its composition couple and with its bottom conical surface cone match, return spring is placed in the stage casing of control valve shaft stepped shaft through hole and withstands control plunger, the conical surface cone match of the step of the stepped shaft through hole of control valve shaft conical surface and control valve ectosome, the fitting surface of controlling plunger and control valve ectosome is high planeness plane, each part end face close proximity, form sealing, control plunger upper end cylinder and control valve shaft inner circle hole composition couple, control plunger, control valve ectosome, controlling valve shaft coaxality installs, controlling plunger can move flexibly in controlling valve shaft stepped shaft through hole, the axial pressure that controls valve shaft is in a basic balance, control valve shaft small axle diameter section through the small end of control valve ectosome stepped shaft through hole, and with the circular drainback passage III of its formation, it is characterized in that:
Described electromagnetic driver is by the electromagnetic driver housing of installing in turn, pushing rod sleeve, concentrating flux sleeve, push rod, push rod cup, electromagnetic valve core, coil holder, coil, electromagnetic driver cushion block, end cap, loaded spring and electromagnetic driver lock bolt form, under the magnetic fields that electromagnetic valve core provides at coil, along magnetic direction, move, thereby drive push rod to move, make the push rod cup of push rod promote to control valve shaft, make to control valve shaft and move flexibly in the shoulder hole of control valve ectosome.
Its further technological scheme is: the electromagnetic driver lock bolt of described electromagnetic driver is a waney cylindrical body, cylindrical upper end is thread cylinder, its lower end is the lock bolt hole cylinder that has lock bolt endoporus, between the different diameter of axle sections of cylindrical body, is circular cone transition;
Described end cap is with end cap central bore, and the upper and lower end of center hole is chamfering respectively, in a side of center hole, has end cap connecting groove, has two end cap positioning boss in end cap lower end, and end cap closely cooperates by two end cap positioning boss and electromagnetic driver housing;
Described electromagnetic valve core is that its center, upper end has the cylindrical body that loaded spring groove, center, lower end have push rod groove, and loaded spring is arranged in the loaded spring groove of electromagnetic valve core;
There is the stepped shaft through hole with 3 grades of steps at described electromagnetic driver housing center, coil is on coil holder, be placed in the stage casing of the stepped shaft through hole of electromagnetic driver housing, electromagnetic driver cushion block is arranged on the epimere of the stepped shaft through hole of electromagnetic driver housing, coil pressing, has electromagnetic driver cushion block filler opening and electromagnetic driver cushion block oil outlet on electromagnetic driver cushion block;
Described push rod is a thin and long circular axis, and push rod cup is the circular shaft that diameter is larger than push rod, and push rod cup underpart is reserved with vent;
Described pushing rod sleeve is waney cylindrical body that a middle cylindrical has boss, and cylindrical body center has the stepped shaft through hole with 1 grade of step, and pushing rod sleeve is arranged on the hypomere of the stepped shaft through hole of electromagnetic driver housing;
Adopt the magnetic material concentrating flux sleeve of making and the magnetic shield that adopts nonmagnetic substance to make to be enclosed within successively electromagnetic valve core outer rim and pushing rod sleeve top; Push rod upper end is arranged on the push rod groove lower end interior, push rod of electromagnetic valve core and stretches in the stepped shaft through hole of pushing rod sleeve, and push rod lower end is connected with a push rod cup;
Between electromagnetic valve core lower end surface and pushing rod sleeve upper-end surface, be reserved with the magnetic gap A of demagnetizing action, before electromagnetic valve core is failure to actuate, under the effect of loaded spring, by fine setting electromagnetic driver lock bolt, can adjust magnetic gap A, when electromagnetic valve core is subject to after excitation effect, electromagnetic valve core moves axially along concentrating flux sleeve, promotes push rod and push rod cup action, and then promote to control plunger, make to control valve shaft and move flexibly in the shoulder hole of control valve ectosome.
Its further technological scheme be: described electromagnetic driver housing, pushing rod sleeve, magnetic shield and concentrating flux sleeve are integrally welded successively.
Owing to adopting technique scheme, the Zero-backpressure electronically-controlled diesel injector of a kind of Electromagnetic Drive of the present invention has following beneficial effect:
One, can realize more accurately, the high-pressure diesel of higher frequency sprays, and makes multi-injection be more prone to realize, thereby make noise, oil consumption, the discharge of diesel engine, all technical of output power is improved.
The present invention adopts electromagnetic driver, two-position three-way valve without back pressure, under high-pressure diesel state, by electromagnetic driver, is driven and is controlled two-position three-way valve without back pressure, reaches and uses the weak electric signal of computer controlled system to control the object that high-pressure diesel accurately sprays.Due to the magnetic conduction of solenoid valve uniqueness, design every magnetic, spool is not subject to external interference in driving process, 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 high-pressure diesel more accurate, higher frequency and spray.
Two, scientific structure, simple, reliable, processing and fabricating is convenient, and cost is low.
The Zero-backpressure electronically-controlled diesel injector of a kind of Electromagnetic Drive of the present invention adopts transition block is sequentially installed successively vertically in nozzle holder, two-position three-way valve without back pressure, adjust pad, locking nut, electromagnetic 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, electromagnetic driver lower end surface is all high planeness planes, each part end face close proximity, form sealing, formed the axially movable mechanism of oil nozzle needle that is controlled two-position three-way valve without back pressure under high-pressure diesel state by electromagnetic driver, it is simple in structure, by electromagnetic driver, drive and control two-position three-way valve without back pressure, can realize accurate high frequency high-pressure diesel sprays, cost and the manufacture difficulty of diesel oil automatical control system critical component electric-controlled fuel injector have been reduced.
Three,, by the switch on and off characteristic of solenoid valve, improved the high frequency response characteristic of oil sprayer:
The present invention separates with magnetic shield 252 and magnetic gap A between pushing rod sleeve 281 and spool 25, the magnetic resistance to pushing rod sleeve 281 by coil 27 is increased, force electromagnetism cushion block 23, the concentrating flux sleeve 251 that the magnetic line of force is done through magnetic material to arrive spool 25, formation is from coil 27, electromagnetism cushion block 23, concentrating flux sleeve 251, spool 25, magnetic gap A between spool 25 and pushing rod sleeve 281 is to pushing rod sleeve 281, the magnetic loop of electromagnetic driver housing 29, electromagnetism cushion block 23, makes spool obtain magnetic force mobile in concentrating flux sleeve;
When coil 27 is switched on, under the magnetic fields that electromagnetic valve core 25 provides at coil 27, along magnetic direction, move, thereby drive push rod 28 and push rod cup 282, push rod cup 282 drives the control valve shaft 53 of two-position three-way valve without back pressure 5, the conical surface 522 that makes to control on the control valve conical surface of shaft 533 of valve shaft 53 and the control valve ectosome stepped shaft through hole of control valve ectosome 52 forms gap, now two-position three-way valve without back pressure 5 is communicated with oil circuit II and III, high-pressure oil passage promotes oil sprayer couple oil circuit 91 mesohigh oil and promotes needle 10, realizes oil spout.
When coil 27 power-off, when valve core of the electromagnetic valve 25 loses excitation, on electromagnetic valve core 25 axles, move and return to normal, oil spout oil circuit is closed, and the pressure of injector nozzle matching parts rises rapidly, and oil spout stops; Particularly owing to having magnetic gap A between the spool 25 of the present invention's electromagnetic driver and pushing rod sleeve 281, this magnetic gap A has played the effect every (breaking) magnetic field, valve core of the electromagnetic valve 25 is returning quickly under return spring 8 effects, therefore, by the switch on and off characteristic of solenoid valve, improved the high frequency response characteristic of oil sprayer.
Four, processing and fabricating is convenient, guarantees the raising of oil sprayer performance:
1. the classical mode that suitable magnetic gap A replaces magnetic shield-concentrating flux sleeve-antifreeze plate is controlled in electromagnetic driver utilization of the present invention, has lowered structure complexity, has reduced technique, cost-saving, has more improved the speed of response of oil nozzle.
2. the pusher assembly that electromagnetic driver of the present invention connects and composes by welding manner after push rod 28 and push rod cup 282 separately made again, as the actuator of spool 25, has been avoided the unmanageable drawback of major axis, has reduced difficulty of processing, has reduced oil sprayer cost; Vent 2821 is reserved in push rod cup 282 underparts, avoids blocking the stepped shaft through hole 521 of control valve ectosome, guarantees the raising of the unimpeded and oil sprayer performance of oil circuit.
3. the present invention is integrally welded successively by electromagnetic driver housing 29, pushing rod sleeve 281, magnetic shield 252 and concentrating flux sleeve 251, has guaranteed coaxality and the homogeneity of product of each component of electromagnetic driver, simplified structure, minimizing technique, the maintenance cost that reduces.
Below, by reference to the accompanying drawings the technical characteristics of the Zero-backpressure electronically-controlled diesel injector of a kind of Electromagnetic Drive of the present invention is described further.
accompanying drawing explanation
Fig. 1-1～Fig. 1-4: a kind of Zero-backpressure electronically-controlled diesel injector structure and working state schematic representation of Electromagnetic Drive:
Fig. 1-1: the main sectional view, Fig. 1-2 looked: left view,
Fig. 1-3: normality-not oil spout state, Fig. 1-4: valve core of the electromagnetic valve action-oil spout state;
Fig. 2～Fig. 2-8: the overall structure of electromagnetic driver and critical piece structural representation:
Fig. 2: the overall structure schematic diagram of electromagnetic driver,
Fig. 2-1: electromagnetic driver lock bolt structural representation,
Fig. 2-2: end cover structure schematic diagram;
Fig. 2-3～Fig. 2-31: electromagnetic pads block structure schematic diagram, Fig. 2-31st wherein, the B-B sectional view of Fig. 2-3;
Fig. 2-4: loaded spring structural representation;
Fig. 2-5: electromagnetic valve core structural representation, Fig. 2-51: concentrating flux sleeve structural representation, Fig. 2-52: magnetic shield structural representation;
Fig. 2-6: the structural representation of coil and coil holder;
Fig. 2-7: pusher structure schematic diagram, Fig. 2-71: pushing rod sleeve structural representation;
Fig. 2-72: push rod cup structural representation, Fig. 2-721: the worm's eye view of Fig. 2-72;
Fig. 2-8: electromagnetic driver shell construction schematic diagram;
Fig. 3～Fig. 3-3: the overall structure of two-position three-way valve without back pressure and critical piece structural representation:
Fig. 3: the overall structure schematic diagram of two-position three-way valve without back pressure,
Fig. 3-1: control piston structure schematic diagram,
Fig. 3-21: control valve ectosome structural representation, Fig. 3-22: the C portion enlarged view of Fig. 3-21;
Fig. 3-3: control valve axle construction schematic diagram;
Fig. 4-1～Fig. 4-2: shell construction schematic diagram:
Fig. 4-1: the main sectional view, Fig. 4-2 looked: left view;
Fig. 5: locking nut structure schematic diagram;
Fig. 6: spacer chip architecture schematic diagram;
Fig. 7-1～Fig. 7-2: transition block structural representation:
Fig. 7-1: the main sectional view, Fig. 7-2 looked: worm's eye view.
In Fig. 1-1～Fig. 1-4:
1-plastic casing wiring terminal, 2-electromagnetic driver, 3-locking nut, 4-adjusts pad, 5-two-position three-way valve without back pressure, 6-nozzle holder, 7-transition block, 8-pressure spring, 9-injector nozzle matching parts, the oil inlet hole of 91-injector nozzle matching parts, 10-needle, 11-nut sleeve, 12-high-pressure oil pipe joint
;
In Fig. 2～Fig. 2-8:
2-electromagnetic driver; 21-electromagnetic driver lock bolt, 211-thread cylinder, 212-lock bolt hole cylinder, 213-lock bolt lower end surface, 214-lock bolt endoporus;
22-end cap, 221-end cap central bore, 222-connecting groove, 223-end cap positioning boss;
23 1 electromagnetic driver cushion blocks, 231-electromagnetic driver cushion block filler opening, 232-electromagnetic driver cushion block oil outlet;
24-loaded spring, 25-electromagnetic valve core; 2501-spool loaded spring groove, 2502-spool technology groove, 2503-spool push rod groove; 251-concentrating flux sleeve, 252-magnetic shield, 26-coil holder, 27-coil, 28-push rod, 281-pushing rod sleeve, the stepped shaft through hole 2811 of 2811-pushing rod sleeve; 282-push rod cup, 2821-vent,
29-electromagnetic driver housing, the stepped central hole of 291-electromagnetic driver housing, A-magnetic gap.
In Fig. 3～Fig. 3-3:
51-controls plunger, 511-large-diameter base, and 512-straight hole-oil duct II, 513-small axle diameter section, 5131-controls plunger conical surface, 514-small axle diameter section I, 5141-horizontal hole, 515-small axle diameter section II, 516-central blind hole;
52-control valve ectosome, the stepped shaft through hole of 521-control valve ectosome, the conical surface on 522-control valve ectosome stepped shaft through hole;
53-controls valve shaft, and 531-controls valve shaft center hole-stepped shaft through hole, and 532-controls valve shaft large-diameter section, 533-control valve conical surface of shaft; 534-controls valve shaft small axle diameter section; 54-return spring;
Oil sprayer high pressure oil oil inlet passage-661,73, oil duct I, 65,91,63,72, oil duct II,
Oil sprayer drainback passage-63,72, back oil road III, oil duct II;
All the other labels are shown in described in literary composition.
embodiment
Embodiment one:
A kind of Zero-backpressure electronically-controlled diesel injector of Electromagnetic Drive, comprise the nozzle holder 6 with oil inlet passage and drainback passage, nut sleeve 11, electromagnetic driver 2, locking nut 3, adjust pad 4, two-position three-way valve without back pressure 5, transition block 7, pressure spring 8, injector nozzle matching parts 9 and needle 10, in nozzle holder 6, order is installed transition block 7 successively vertically, two-position three-way valve without back pressure 5, adjust pad 4, locking nut 3, electromagnetic driver 2, order setting pressure spring 8 and injector nozzle matching parts 9 successively in nut sleeve 11, 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 electromagnetic driver 2 is all high planeness planes, each part end face close proximity, form sealing, formed under high-pressure diesel state by electromagnetic driver, control two-position three-way valve without back pressure the axially movable mechanism of oil nozzle needle (referring to Fig. 1-1, Fig. 1-2),
Described electromagnetic driver 2 is by the electromagnetic driver housing 29 of installing in turn, pushing rod sleeve 281, concentrating flux sleeve 251, push rod 28, push rod cup 282, electromagnetic valve core 25, coil holder 26, coil 27, electromagnetic driver cushion block 23, end cap 22, moves along magnetic direction under the magnetic fields that loaded spring 24 and electromagnetic driver lock bolt 21 composition (referring to Fig. 2) electromagnetic valve cores 25 provide at coil 27, thereby drives push rod 28 to move, make the push rod cup 282 of push rod 28 promote to control valve shaft 53, make to control valve shaft 53 and move flexibly in the shoulder hole of control valve ectosome 52.
The electromagnetic driver lock bolt 21 of described electromagnetic driver is a waney cylindrical body, cylindrical upper end is thread cylinder 211, its lower end is the lock bolt hole cylinder 212 that has lock bolt endoporus 214, between the different diameter of axle sections of cylindrical body, is circular cone transition (referring to Fig. 2-1);
Described end cap 22 is with center hole, the upper and lower end of end cap central bore 221 is chamfering respectively, a side in end cap central bore has connecting groove 222, to connect external power supply and field coil, in end cap 22 lower ends, have two end cap positioning boss 223, end cap 22 is by two end cap positioning boss 223 and electromagnetic driver housing 29 closely cooperate (referring to Fig. 2, Fig. 2-2);
Described electromagnetic valve core 25 is that its center, upper end has the cylindrical body that loaded spring groove 2501, center, lower end have push rod groove 2503, loaded spring 24 is arranged in the loaded spring groove 2501 of electromagnetic valve core 25, and electromagnetic valve core 25 lower end outer rims have technology groove 2502(referring to Fig. 2, Fig. 2-5);
There is the stepped shaft through hole 291 with 3 grades of steps at described electromagnetic driver housing 29 centers, coil 27 is on coil holder 26, be placed in the stage casing of the stepped shaft through hole 291 of electromagnetic driver housing 29, electromagnetic driver cushion block 23 is arranged on the epimere of the stepped shaft through hole 291 of electromagnetic driver housing 29, coil pressing 27, prevents that coil 27 is because of magnetic force play; On electromagnetic driver cushion block 23, there are electromagnetic driver cushion block filler opening 231 and electromagnetic driver cushion block oil outlet 232(referring to Fig. 2, Fig. 2-3, Fig. 2-6, Fig. 2-8);
Described push rod 28 is a thin and long circular axis, push rod cup 282 is the circular shaft that diameter is larger than push rod 28, push rod cup 282 underpart millings become homalocephalus shape and are reserved with vent 2821, to avoid blocking the stepped shaft through hole 521 of control valve ectosome, guarantee oil circuit unimpeded (referring to Fig. 2, Fig. 2-7, Fig. 2-72);
Described pushing rod sleeve 281 is waney cylindrical bodys that a middle cylindrical has boss, cylindrical body center has the stepped shaft through hole 2811 with 1 grade of step, and pushing rod sleeve 281 is arranged on the hypomere (referring to Fig. 2, Fig. 2-71) of the stepped shaft through hole 291 of electromagnetic driver housing 29;
Adopt the magnetic material concentrating flux sleeve 251 of making and the magnetic shield 252 that adopts nonmagnetic substance to make to be enclosed within successively electromagnetic valve core 25 outer rims and pushing rod sleeve 281 tops; Push rod 28 upper ends are arranged on push rod groove 2503 lower end interior, push rod 28 of electromagnetic valve core 25 and stretch in the stepped shaft through hole 2811 of pushing rod sleeve, and push rod 28 lower ends are connected with a push rod cup 282, (referring to Fig. 2);
The magnetic gap A(that has been reserved with demagnetizing action between electromagnetic valve core 25 lower end surfaces and pushing rod sleeve 281 upper-end surfaces is referring to Fig. 2), before electromagnetic valve core 25 is failure to actuate, under the effect of loaded spring 24, by fine setting electromagnetic driver lock bolt 21, can adjust magnetic gap A, to realize the quick response function of electromagnetic driver; When electromagnetic valve core 25 is subject to after excitation effect, electromagnetic valve core 25 moves axially along concentrating flux sleeve 251, promotes push rod 28 and push rod cup 282 actions, and then promotes to control plunger 51, makes to control valve shaft 53 and moves flexibly in the shoulder hole of control valve ectosome 52.
As a kind of conversion of the Zero-backpressure electronically-controlled diesel injector embodiment of the bright Electromagnetic Drive of the present invention, can electromagnetic driver housing 29, pushing rod sleeve 281, magnetic shield 252 and concentrating flux sleeve 251 is integrally welded successively; Like this, both guaranteed coaxality and the homogeneity of product of each component of electromagnetic driver, again can simplified structure, reduce technique, reduce maintenance cost.
Described two-position three-way valve without back pressure comprises controls plunger 51, control valve ectosome 52, control valve shaft 53 and return spring 54(referring to Fig. 3);
Described control plunger 51 is that one end is the not isometrical shaft-like part of large-diameter base 511, between small axle diameter section II 515 and time small axle diameter section 513, it is small axle diameter section I 514, small axle diameter section I 514 has horizontal hole 5141, on large-diameter base, have the T font oil duct I being formed with horizontal hole 5141 by central blind hole 516, the straight hole road 512 parallel with central blind hole 516 forms oil duct II, between inferior small axle diameter section 513 and small axle diameter section I 514, is conical surface 5131 transition (referring to Fig. 3-1);
Described control valve ectosome 52 is the cylindrical bodys with stepped shaft through hole 521, and the reducing place of this stepped shaft through hole 521 is that conical surface 522(is referring to Fig. 3-21, Fig. 3-22);
Described control valve shaft 53 is that a center hole is the not isometrical shaft-like part of 3 grades of stepped shaft through holes 531, controlling valve shaft large-diameter section 532 and controlling between valve shaft small axle diameter 534 is conical surface 533, and there is the conical surface 5311(bottom of controlling the stepped shaft through hole 531 large ends of valve shaft referring to figure
3-3);
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 grades of step-shaped blind holes 611 at center, the large end of this step-shaped blind hole 611 is used for laying two-position three-way valve without back pressure, there is respectively high pressure oil inlet hole 65 and the oilhole 63 that runs through housing stage casing and miner diameter end section the both sides of step-shaped blind hole 611 bottoms, there is a horizontal ledge 66 in 62 left sides, stage casing, there is single order trapezoidal hole 661 at its center, the large end of this stepped shaft through hole 661 is threaded with high-pressure oil pipe joint, the aperture section of stepped shaft through hole 661 is that high pressure oil oil inlet passage is communicated with high pressure oil inlet hole 65, outside thread is arranged at miner diameter end section 64 bottoms, center also have one for the blind hole 641(that lays pressure spring referring to Fig. 4-1, Fig. 4-2).
Described transition block 7, for the thin column with center hole 71, has transition block oil inlet hole 73, transition block oilhole 72(referring to Fig. 7-1, Fig. 7-2 on it).
Oil sprayer high pressure oil inlet passage comprises oil inlet hole 661, the transition block oil inlet hole 73 in transition block and transition block oilhole 72, the oil duct I on two-position three-way valve without back pressure 5 and oil duct II, the high pressure oil inlet hole 65 on housing and the oil inlet hole 91 of oilhole 63 and injector nozzle matching parts of nozzle holder;
Drainback passage is comprised of the spill port 63 of the back oil road III on two-position three-way valve without back pressure 5, oil duct II, nozzle holder.
working procedure is as follows:
Connect after high-pressure diesel, high-pressure diesel enters electric-controlled fuel injector by the oil inlet hole 661 of nozzle holder from high-pressure oil pipe passage 661, transition block oil inlet hole 73 in transition block and transition block oilhole 72, oil duct I on two-position three-way valve without back pressure 5 and oil duct II, the oil inlet passage that high pressure oil inlet hole 65 on housing and the oil inlet hole of oilhole 63 and injector nozzle matching parts 91 form, wherein a road arrives the pressure chamber of injector nozzle matching parts and the needle valve seat of oil nozzle, another road is through housing middle part oilhole 65, transition block oilhole 73 in transition block enters two-position three-way valve without back pressure 5, because electromagnetic valve core 25 is when without magnetic pumping state, under return spring 54 effects, control conical surface 522 conical surface drive fit closed states of the step of the stepped shaft through hole 521 of valve shaft 53 in control valve shaft conical surface 533 and control valve ectosome 52,
High pressure oil connects with the T font oil duct I on it by the oil duct II 512 of controlling on plunger 51, oil duct II 512, transition block oilhole 73 transition block in, oilhole housing on 63 of high-pressure diesel from two-position three-way valve without back pressure 51 arrives the top of needle, not oil spout of oil sprayer, (referring to Fig. 1-3) are in the normal state;
When electromagnetic valve core 25 excited target of electromagnetic driver, valve core of the electromagnetic valve 25 moves vertically, control valve shaft 53 and be displaced downwardly to the conical surface 5311 of controlling the large bottom of valve shaft stepped shaft through hole 531 portion and the conical surface 5131 drive fits closures of controlling 51 small axle diameter sections 513 of plunger, working solution connects by oil duct II and the back oil road III of controlling on plunger 51, oil nozzle needle 10 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 electromagnetic valve core 25 loses excitation, on electromagnetic valve core 25 is axial, moves and return to normal, oil spout oil circuit is closed, and the pressure of injector nozzle matching parts rises rapidly, and oil spout stops.
Claims (3)
1. the Zero-backpressure electronically-controlled diesel injector of an Electromagnetic Drive, comprise the nozzle holder with oil inlet passage and drainback passage, nut sleeve, electromagnetic driver, two-position three-way valve without back pressure, locking nut, adjust pad, transition block, pressure spring, injector nozzle matching parts, in nozzle holder, order is installed transition block successively vertically, two-position three-way valve without back pressure, adjust pad, locking nut, electromagnetic 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, electromagnetic driver lower end surface is all high planeness planes, each part end face close proximity, form sealing, formed the axially movable mechanism of oil nozzle needle that is controlled two-position three-way valve without back pressure under high-pressure diesel state by electromagnetic driver,
Described two-position three-way valve without back pressure (5), comprise the control plunger that has turnover oil duct on it, on it, there is the control valve ectosome of drainback passage and control valve shaft, described control plunger (51) is not isometrical shaft-like part, described control valve ectosome (52) is the cylindrical body with stepped shaft through hole (521), described control valve shaft (53) is that a center hole is the not isometrical shaft-like part of 3 grades of stepped shaft through holes (531), controlling valve shaft large-diameter section (532) and controlling between valve shaft small axle diameter section (534) is conical surface (533), the conical surface (5311) is arranged at the bottom of controlling the large end of stepped shaft through hole (531) of valve shaft, control plunger (51), controlling valve shaft (53) and control valve ectosome (52) installs from bottom to up successively, control plunger (51) put into control the large end of valve shaft stepped shaft through hole (531) and its composition couple and with its bottom the conical surface (5311) cone match, return spring (54) is placed in the stage casing of control valve shaft stepped shaft through hole (531) and withstands control plunger (51), conical surface (522) cone match of the step of the stepped shaft through hole (521) of control valve shaft conical surface (533) and control valve ectosome (52), the fitting surface of controlling plunger and control valve ectosome is high planeness plane, each part end face close proximity, form sealing, control plunger upper end cylinder and control valve shaft inner circle hole composition couple, control plunger, control valve ectosome, controlling valve shaft coaxality installs, controlling plunger can be mobile flexibly in controlling valve shaft stepped shaft through hole (531), the axial pressure that controls valve shaft is in a basic balance, control valve shaft small axle diameter section (534) through the small end of control valve ectosome stepped shaft through hole (521), and with the circular drainback passage III of its formation, it is characterized in that:
Described electromagnetic driver (2) is by the electromagnetic driver housing (29) of installing in turn, pushing rod sleeve (281), concentrating flux sleeve (251), push rod (28), push rod cup (282), electromagnetic valve core (25), coil holder (26), coil (27), electromagnetic driver cushion block (23), end cap (22), loaded spring (24) and electromagnetic driver lock bolt (21) form, under the magnetic fields that electromagnetic valve core (25) provides at coil (27), along magnetic direction, move, thereby drive push rod (28) mobile, make the push rod cup (282) of push rod (28) promote to control valve shaft (53), make to control valve shaft (53) mobile flexibly in the shoulder hole of control valve ectosome (52).
2. the Zero-backpressure electronically-controlled diesel injector of a kind of Electromagnetic Drive according to claim 1, it is characterized in that: the electromagnetic driver lock bolt (21) of described electromagnetic driver is a waney cylindrical body, cylindrical upper end is thread cylinder (211), its lower end, for having the lock bolt hole cylinder (212) of lock bolt endoporus (214), is circular cone transition between the different diameter of axle sections of cylindrical body;
Described end cap (22) is with end cap central bore (221), the upper and lower end of center hole is chamfering respectively, a side at center hole has end cap connecting groove (222), in end cap (22) lower end, have two end cap positioning boss (223), end cap (22) closely cooperates by two end cap positioning boss (223) and electromagnetic driver housing (29);
Described electromagnetic valve core (25) is that its center, upper end has the cylindrical body that loaded spring groove (2501), center, lower end have push rod groove (2503), and loaded spring (24) is arranged in the loaded spring groove (2501) of electromagnetic valve core (25);
There is the stepped shaft through hole (291) with 3 grades of steps at described electromagnetic driver housing (29) center, coil (27) is on coil holder (26), be placed in the stage casing of the stepped shaft through hole (291) of electromagnetic driver housing (29), electromagnetic driver cushion block (23) is arranged on the epimere of the stepped shaft through hole (291) of electromagnetic driver housing (29), coil pressing (27), has electromagnetic driver cushion block filler opening (231) and electromagnetic driver cushion block oil outlet (232) on electromagnetic driver cushion block (23);
Described push rod (28) is a thin and long circular axis, push rod cup (282) be diameter than the large circular shaft of push rod (28), push rod cup (282) underpart is reserved with vent (2821);
Described pushing rod sleeve (281) is waney cylindrical body that a middle cylindrical has boss, cylindrical body center has the stepped shaft through hole (2811) with 1 grade of step, and pushing rod sleeve (281) is arranged on the hypomere of the stepped shaft through hole (291) of electromagnetic driver housing (29);
The magnetic shield (252) that adopts the concentrating flux sleeve (251) of magnetic material making and adopt nonmagnetic substance to make is enclosed within electromagnetic valve core (25) outer rim and pushing rod sleeve (281) top successively; Push rod (28) upper end is arranged on push rod groove (2503) lower end interior, push rod (28) of electromagnetic valve core (25) and stretches in the stepped shaft through hole (2811) of pushing rod sleeve, and push rod (28) lower end is connected with a push rod cup (282);
Between electromagnetic valve core (25) lower end surface and pushing rod sleeve (281) upper-end surface, be reserved with the magnetic gap (A) of demagnetizing action, before electromagnetic valve core (25) is failure to actuate, under the effect of loaded spring (24), by fine setting electromagnetic driver lock bolt (21), can adjust magnetic gap (A), when electromagnetic valve core (25) is subject to after excitation effect, electromagnetic valve core (25) moves axially along concentrating flux sleeve (251), promote push rod (28) and push rod cup (282) action, and then plunger (51) is controlled in promotion, make to control valve shaft (53) mobile flexibly in the shoulder hole of control valve ectosome (52).
3. the Zero-backpressure electronically-controlled diesel injector of a kind of Electromagnetic Drive according to claim 1. it is characterized in that: described electromagnetic driver housing (29), pushing rod sleeve (281), magnetic shield (252) and concentrating flux sleeve (251) are integrally welded successively.
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| CN201310664304.3A CN103603756B (en) | 2013-12-10 | 2013-12-10 | A kind of Zero-backpressure electronically-controlled diesel injector of Electromagnetic Drive |
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| CN201310664304.3A CN103603756B (en) | 2013-12-10 | 2013-12-10 | A kind of Zero-backpressure electronically-controlled diesel injector of Electromagnetic Drive |
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| CN103603756B CN103603756B (en) | 2015-12-16 |
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Cited By (1)
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| CN116066439A (en) * | 2022-12-27 | 2023-05-05 | 中国矿业大学 | Valve core push rod split type miniature high-speed digital valve |
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| CN103603756B (en) | 2015-12-16 |
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Address after: 545006 East 2 Yangxu Road, Yufeng District, Liuzhou City, Guangxi Zhuang Autonomous Region Patentee after: Guangxi Auto Tractor Research Institute Co., Ltd. Address before: No. 18, Hexi Road, Liuzhou, the Guangxi Zhuang Autonomous Region, the Guangxi Zhuang Autonomous Region Patentee before: GUANGXI ZHUANG AUTONOMOUS REGION AUTOMOBILE TRACTOR RESEARCH INSTITUTE |