CN105673287A - High-voltage common-rail electrically-controlled oil sprayer - Google Patents
High-voltage common-rail electrically-controlled oil sprayer Download PDFInfo
- Publication number
- CN105673287A CN105673287A CN201610211851.XA CN201610211851A CN105673287A CN 105673287 A CN105673287 A CN 105673287A CN 201610211851 A CN201610211851 A CN 201610211851A CN 105673287 A CN105673287 A CN 105673287A
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- China
- Prior art keywords
- valve
- armature
- spring
- high pressure
- common rail
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
- F02M63/0019—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of electromagnets or fixed armatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
- F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
- F02M61/10—Other injectors with elongated valve bodies, i.e. of needle-valve type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0014—Valves characterised by the valve actuating means
- F02M63/0015—Valves characterised by the valve actuating means electrical, e.g. using solenoid
- F02M63/0017—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means
- F02M63/0021—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures
- F02M63/0022—Valves characterised by the valve actuating means electrical, e.g. using solenoid using electromagnetic operating means characterised by the arrangement of mobile armatures the armature and the valve being allowed to move relatively to each other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0056—Throttling valves, e.g. having variable opening positions throttling the flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0059—Arrangements of valve actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/007—Details not provided for in, or of interest apart from, the apparatus of the groups F02M63/0014 - F02M63/0059
- F02M63/0075—Stop members in valves, e.g. plates or disks limiting the movement of armature, valve or spring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
- F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
Abstract
The invention discloses a high-voltage common-rail electrically-controlled oil sprayer. The high-voltage common-rail electrically-controlled oil sprayer comprises an oil sprayer body, wherein a valve assembly formed by a control valve and a control piston is assembled in the oil sprayer body, an armature assembly is arranged above the control valve, an armature lift-range adjusting washer is arranged between the armature assembly and the control valve, and an electromagnetic valve assembly is arranged above the armature assembly; and an oil return throttling hole of the control valve is cooperated with a steel ball, the lower end of the control piston is cooperated with an ejector rod, an oil nozzle spring sleeves the ejector rod, an oil spraying nozzle mated part is arranged below the ejector rod, an oil spraying nozzle tightening cap sleeves the oil spraying nozzle mated part, and the oil spraying nozzle tightening cap is connected with the lower end of the oil sprayer body in a screwing manner. The high-voltage common-rail electrically-controlled oil sprayer has the advantages of reasonability in structure, convenience in assembly and repair, convenience in clearance adjustment, low production cost and long service life.
Description
Technical field
The present invention relates to Electronic Control Technology in Diesel Engines field, especially refer to a kind of high pressure common rail electric control fuel injector.
Background technology
Along with the global human raising day by day to diesel emission and cost-effectiveness requirement, traditional mechanical formula diesel fuel injection system cannot meet existing demand. The development promotion diesel engine fuel injection system of electronic control technology is developed by leaps and bounds for three times, wherein high pressure common rail fuel injection system achieves the Flexible Control such as high-pressure injection, independent oil injection timing, injection rate, improve economy, improve dynamic property and reliability, the development trend of electronic controlled diesel fuel injection system will be become. At present, domestic high pressure common rail electric control fuel injector manufacturer, all adopt following structure: control piston directly with injector body inner hole, composition one pair couple; The control valve seat controlled in valve member is pressed on restricting orifice in the inner chamber of injector body upper end, adopts plane sealing structure between armature lever lower surface and the upper surface, meter out hole of restricting orifice in armature component; The stroke of armature adjusts packing ring by armature lift and adjusts; Armature upper surface is shaped with a small boss, and it is highly the air-gap between the iron core lower surface in armature upper surface and electromagnetic valve component. This structure, has the disadvantage in that 1, injector body must adopt carburizing quenching process, and guiding mesopore must have enough hardness, and manufacturing cost is high; After using certain time, the place's of cooperation abrasion of injector body and control piston, injector body is scrapped, and use cost is high. 2, adopting plane sealing structure between the upper surface, meter out hole of the armature lever lower surface in armature component and restricting orifice, the Geometrical Tolerance Principle necessarily making each correlated parts is sufficiently high, and manufacturing cost is high. 3, armature component is descending, it does not have buffer spring, restricting orifice can be produced bigger downward impulsive force. 4, the air-gap between the iron core lower surface in armature upper surface and electromagnetic valve component, is controlled by the small boss height of armature upper surface, it does not have adjustable; Further, electromagnetic valve iron core is had impulsive force, increase electromagnetic valve manufacturing cost.
Summary of the invention
The technical problem to be solved is the present situation for prior art, it is provided that rational in infrastructure, assembling, easy to maintenance, gap is easy to adjust, and production cost is low, a kind of high pressure common rail electric control fuel injector of long service life.
This invention address that the technical scheme that above-mentioned technical problem adopts is:
A kind of high pressure common rail electric control fuel injector, include injector body, in injector body, assembling is by controlling valve and controlling the valve module that piston is constituted, what control valve is provided above armature component, this armature component and control to be provided with armature lift between valve and adjust packing ring, armature component be provided above electromagnetic valve component;Match with steel ball in the meter out hole controlling valve, control piston lower end match with push rod, be set with oil nozzle spring outside this push rod, push rod be arranged below injector nozzle matching parts, nozzle cap nut it is set with, the lower end bolt of this nozzle cap nut and injector body outside injector nozzle matching parts.
The technical measures optimized also include:
Above-mentioned armature component includes armature, housing screw, buffer spring, fairlead and armature shaft, fairlead is placed on the bottom of described armature shaft, armature be placed on described armature shaft top, buffer spring is placed on outside described armature and fairlead, its upper end and armature offset, lower end and fairlead offset, and housing screw is placed on outside described buffer spring, and fixes with described fairlead.
Between above-mentioned control valve and injector body, sealing ring is set, this sealing ring be arranged below pushing out ring.
Above-mentioned electromagnetic valve component is outside equipped with the tight cap of electromagnetic valve, the tight cap of this electromagnetic valve and the upper end bolt of described injector body, is provided with air-gap and adjusts packing ring between the upper surface of electromagnetic valve component and described injector body; Being provided with iron core on electromagnetic valve component, core center is provided with electric magnet spring, and the electric magnet spring that is provided above of this electric magnet spring adjusts packing ring.
Above-mentioned control valve is axially shaped with meter out hole, controls valve is radially shaped with meter in hole, control to be shaped with valve control room in valve.
The tapered structure of the port of export in above-mentioned meter out hole, the steel ball matched with described meter out hole is arranged on ball seat, and this ball seat is arranged at the lower end of the armature shaft of armature component.
It is arranged with the spring seat of honour outside the upper end of above-mentioned push rod, is provided with oil nozzle spring between the upper end of the spring seat of honour and described oil nozzle spring and adjusts packing ring.
Above-mentioned injector nozzle matching parts includes needle-valve body and needle-valve, and needle-valve is placed through the center of described needle-valve body, is shaped with atomizer inner chamber in needle-valve body.
Being provided with lift between above-mentioned injector body and described injector nozzle matching parts and place restrictions on block, lift is placed restrictions on and is provided with alignment pin on block, and this alignment pin runs through described lift places restrictions on block, and its upper end is placed in described injector body, and its lower end is placed in described needle-valve body.
Above-mentioned injector body is exterior is furnished with O RunddichtringO.
One high pressure common rail electric control fuel injector of the present invention, it includes electromagnetic valve component, armature component, valve module and injector nozzle matching parts, adopts modularized structure to greatly facilitate assembling and the maintenance of fuel injector; It addition, it at armature component and controls to be provided with armature lift adjustment packing ring between valve, it is ensured that the lift of armature, reduce armature component simultaneously and control the machining accuracy on composition surface between valve, reducing production cost; Match formation sealing structure with steel ball in the meter out hole of control valve, reduces the Geometrical Tolerance Principle of correlated parts, reduces manufacture difficulty, and then reduce production cost.
Additionally, arrange buffer spring in armature component, effectively reduce produced downward impulsive force when steel ball is taken a seat, it is to avoid this impulsive force, to injury produced by parts, is conducive to the raising in service life.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of the present invention;
Fig. 2 is A portion enlarged drawing in Fig. 1;
Fig. 3 is B portion enlarged drawing in Fig. 1;
Fig. 4 is C portion enlarged drawing in Fig. 1;
Fig. 5 is the sectional structure schematic diagram of armature component in Fig. 1;
Fig. 6 is the plan structure figure of armature component in Fig. 1;
Fig. 7 is the sectional structure schematic diagram of electromagnetic valve component in Fig. 1;
Fig. 8 is the sectional structure schematic diagram of valve module in Fig. 1.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
The structural representation of the present invention as shown in Figure 1 to Figure 8 shows the,
Accompanying drawing therein is labeled as: electromagnetic valve component 1, the tight cap 1b of electromagnetic valve, electric magnet spring adjusts packing ring 2, electric magnet spring 3, air-gap adjusts packing ring 4, armature component 5, armature 5a, housing screw 5b, tighten hole 5b1, buffer spring 5c, fairlead 5d, armature shaft 5e, tight cap sealing ring 6, armature lift adjusts packing ring 7, ball seat 8, steel ball 9, sealing ring 10, prop up pushing out ring 11, valve module 12, control valve 12a, meter out hole 12a1, meter in hole 12a2, valve control room 12a3, control piston 12b, O RunddichtringO 13, injector body 14, the spring seat of honour 15, oil nozzle spring adjusts packing ring 16, oil nozzle spring 17, push rod 18, alignment pin 19, lift places restrictions on block 20, injector nozzle matching parts 21, needle-valve body 21a, atomizer inner chamber 21a1, needle-valve 21b, nozzle cap nut 22, seal washer 23.
As shown in Figures 1 to 8,
A kind of high pressure common rail electric control fuel injector, include injector body 14, in injector body 14, assembling is by controlling valve 12a and controlling the piston 12b valve module 12 constituted, what control valve 12a is provided above armature component 5, this armature component 5 and control to be provided with armature lift between valve 12a and adjust packing ring 7, armature component 5 be provided above electromagnetic valve component 1; The meter out hole 12a1 controlling valve 12a matches with steel ball 9, match with push rod 18 in the lower end controlling piston 12b, it is set with oil nozzle spring 17 outside this push rod 18, push rod 18 be arranged below injector nozzle matching parts 21, nozzle cap nut 22 it is set with, the lower end bolt of this nozzle cap nut 22 and injector body 14 outside injector nozzle matching parts 21. Nozzle cap nut 22 is provided with seal washer 23.
In embodiment, armature component 5 includes armature 5a, housing screw 5b, buffer spring 5c, fairlead 5d and armature shaft 5e, fairlead 5d is placed on the bottom of described armature shaft 5e, armature 5a be placed on described armature shaft 5e top, buffer spring 5c is placed on outside described armature 5a and fairlead 5d, and its upper end and armature 5a offset, and lower end and fairlead 5d offset, housing screw 5b is placed on outside described buffer spring 5c, and fixes with described fairlead 5d. Laser weld is adopted to fix between armature 5a and armature shaft 5e.
Housing screw 5b axially offers and tightens hole 5b1; The number tightening hole 5b1 is three, and is uniformly distributed on periphery.
In embodiment, control to arrange sealing ring 10 between valve 12a and injector body 14, this sealing ring 10 be arranged below a pushing out ring 11. Sealing ring 10 and a pushing out ring 11 are set, it is ensured that control the valve 12a sealing coordinated with injector body 14 inner chamber.
In embodiment, electromagnetic valve component 1 is outside equipped with the upper end bolt of the tight cap 1b of electromagnetic valve, this electromagnetic valve tight cap 1b and described injector body 14, is provided with air-gap and adjusts packing ring 4 between the upper surface of electromagnetic valve component 1 and described injector body 14; Being provided with iron core 1a on electromagnetic valve component 1, iron core 1a is provided centrally with electric magnet spring 3, and the electric magnet spring that is provided above of this electric magnet spring 3 adjusts packing ring 2.
It is provided with tight cap sealing ring 6 between the outer wall of injector body 14 and electromagnetic valve tight cap 1b.
In embodiment, control valve 12a is axially shaped with meter out hole 12a1, control valve 12a is radially shaped with meter in hole 12a2, control to be shaped with valve control room 12a3 in valve 12a.
In embodiment, the tapered structure of the port of export of meter out hole 12a1, it is arranged on ball seat 8 with the described meter out hole 12a1 steel ball 9 matched, this ball seat 8 is arranged at the lower end of the armature shaft 5e of armature component 5.
In embodiment, outside the upper end of push rod 18, it is arranged with the spring seat of honour 15, is provided with oil nozzle spring between the upper end of the spring seat of honour 15 and described oil nozzle spring 17 and adjusts packing ring 16.
In embodiment, injector nozzle matching parts 21 includes needle-valve body 21a and needle-valve 21b, needle-valve 21b and is placed through the center of described needle-valve body 21a, is shaped with atomizer inner chamber 21a1 in needle-valve body 21a.
In embodiment, being provided with lift between injector body 14 and described injector nozzle matching parts 21 and place restrictions on block 20, lift is placed restrictions on and is provided with alignment pin 19 on block 20, and this alignment pin 19 runs through described lift places restrictions on block 20, its upper end is placed in described injector body 14, and its lower end is placed in described needle-valve body 21a.
In embodiment, injector body 14 is exterior is furnished with O RunddichtringO 13.
Assembling process:
In the inner chamber of injector body 14 upper end, press-in pushing out ring 11 and sealing ring 10, is then pressed into valve module 12; Valve module 12 upper end is sequentially placed into steel ball 9, ball seat 8, armature lift adjustment packing ring 7, screws in armature component 5 and also tightens; Be sequentially placed into the spring seat of honour 15 in the inner chamber of injector body 14 lower end, oil nozzle spring adjusts packing ring 16, oil nozzle spring 17 and push rod 18, lift places restrictions on block 20 and injector nozzle matching parts 21 is positioned by alignment pin 19 and injector body 14, is then threaded into nozzle cap nut 22 and tightens; Injector body 14 upper surface emptying air gap adjusting pad circle 4, electric magnet spring 3 is put in armature shaft 5e upper end in armature component 5, electromagnetic valve component 1 inner chamber is put into electric magnet spring and adjusts packing ring 2, threadeded with injector body 14 by the tight cap 1b of the electromagnetic valve in electromagnetic valve component 1.
The pretightning force of oil nozzle spring 17 adjusts packing ring 16 by oil nozzle spring and adjusts; The pretightning force of electric magnet spring 3 adjusts packing ring 2 by electric magnet spring and adjusts; The stroke of armature 5a adjusts packing ring 7 by armature lift and adjusts; The air-gap between armature 5a upper surface and the iron core 1a lower surface in electromagnetic valve component 1 in armature component 5, adjusts packing ring 4 by air-gap and adjusts.
After pass the test, injector body 14 is overlapped O RunddichtringO 13, injector nozzle matching parts 21 overlaps upper sealing washer 23.
Operation principle:
High pressure common rail electric control fuel injector is most critical and the most complicated parts in electronic control system, its effect is the opening and closing controlling electromagnetic valve according to the ECU signal of telecommunication sent, and is sprayed into best oil injection time, distributive value and fuel injection rate by the fuel oil in high pressure oil rail in the combustor of diesel engine.
When diesel engine and high-pressure pump work, the function of fuel injector can be divided into 4 states: fuel injector cuts out (relying on wherein only high pressure), fuel injector opens (fuel injection beginning), fuel injector fully opens, fuel injector cuts out (end of injection). This duty is to be produced by the distribution of power on fuel injector component. When diesel engine does not work and do not have pressure in high pressure oil rail, injector nozzle matching parts 21 is closed by the oil nozzle spring 17 in fuel injector.
Fuel injector cuts out (resting state): electromagnetic valve component 1 is not controlled by resting state, is therefore close. When controlling the meter out hole 12a1 closedown of valve 12, steel ball 9 is pressed on the seat surface controlling valve 12a by electric magnet spring 3. Setting up common rail high pressure in valve control room 12a3, same pressure exists in the cavity volume of fuel injector.Common rail pressure makes needle-valve 21b that the unlatching pressure acted on its pressure-bearing surface can not be overcome to be closed at the spring force controlling power and the oil nozzle spring 17 applied on piston 12b.
Fuel injector opens (fuel injection beginning): when fuel injector remains static, once the solenoid of electromagnetic valve component 1 passes into operating current, the suction of solenoid is more than the spring force of electromagnetic valve spring 3, armature 5a rises, the meter out hole 12a1 controlling valve 12 opens, fuel oil flows into its cavity above from valve control room 12a3, and return fuel tank through drainback passage, the pressure in valve control room 12a3 is made to decline, and the meter in hole 12a2 controlling valve 12 can prevent pressure complete equipilibrium, cause that the pressure in valve control room 12a3 is less than the pressure in atomizer inner chamber 21a1 volume, thus needle-valve 21b is opened, commencement of fuel injection.
Fuel injector fully opens: the opening speed of needle-valve 21b depends on the difference in flow on control valve 12 between oil-feed throttle orifice 12a2 and meter out hole 12a1. Control piston 12b and reach its last extreme position, and be fixed on the fuel oil pad between meter in hole 12a2 and meter out hole 12a1 at this place. Now fuel injector fully opens, and fuel oil sprays into combustor with approximate common rail pressure. Power distribution on fuel injector is substantially equal to the power distribution in open stage.
Fuel injector cuts out (end of injection): terminate if electromagnetic valve component 1 controls electric current, then steel ball 9 is pressed in downwards on control valve 12a by armature 5a under the effect of the spring force of electromagnetic valve spring 3, the meter out hole 12a1 of closing control valve 12. Although armature 5a is by armature shaft 5e with moving downwardly together, but it press against buffer spring 5c and moves downwardly together, therefore, and the not bigger downward impulsive force of taking a seat of steel ball 9. Owing to controlling the closedown of the meter out hole 12a1 of valve 12, the oil-feed of meter in hole 12a2 makes again to set up the pressure identical with common rail in valve control room 12a3, increase so that acting on the power controlled on piston 12b, add the spring force of oil nozzle spring 17, exceed the hydraulic coupling in atomizer inner chamber 21a1 volume, then, needle-valve 21b closes, end of injection.
Highly preferred embodiment of the present invention illustrates, those of ordinary skill in the art the various changes made or remodeling are all without departing from the scope of the present invention.
Claims (10)
1. a high pressure common rail electric control fuel injector, include injector body (14), it is characterized in that: in described injector body (14), assembling is by controlling valve (12a) and controlling the valve module (12) that piston (12b) is constituted, described control valve (12a) be provided above armature component (5), this armature component (5) and control to be provided with armature lift between valve (12a) and adjust packing ring (7), described armature component (5) be provided above electromagnetic valve component (1); Match with steel ball (9) in the meter out hole (12a1) of described control valve (12a), match with push rod (18) in the lower end of described control piston (12b), oil nozzle spring (17) it is set with outside this push rod (18), described push rod (18) be arranged below injector nozzle matching parts (21), the lower end bolt of nozzle cap nut (22), this nozzle cap nut (22) and described injector body (14) it is set with outside described injector nozzle matching parts (21).
2. a kind of high pressure common rail electric control fuel injector according to claim 1, it is characterized in that: described armature component (5) includes armature (5a), housing screw (5b), buffer spring (5c), fairlead (5d) and armature shaft (5e), described fairlead (5d) is placed on the bottom of described armature shaft (5e), described armature (5a) be placed on described armature shaft (5e) top, described buffer spring (5c) is placed on described armature (5a) and fairlead (5d) outward, its upper end and armature (5a) offset, lower end and fairlead (5d) offset, described housing screw (5b) is placed on described buffer spring (5c) outward, and fix with described fairlead (5d).
3. a kind of high pressure common rail electric control fuel injector according to claim 2, it is characterized in that: sealing ring (10) is set between described control valve (12a) and injector body (14), this sealing ring (10) be arranged below pushing out ring (11).
4. a kind of high pressure common rail electric control fuel injector according to claim 3, it is characterized in that: described electromagnetic valve component (1) is outside equipped with the tight cap of electromagnetic valve (1b), the tight cap of this electromagnetic valve (1b) and the upper end bolt of described injector body (14), be provided with air-gap and adjust packing ring (4) between described electromagnetic valve component (1) and the upper surface of described injector body (14); Described electromagnetic valve component (1) is provided with iron core (1a), described iron core (1a) is provided centrally with electric magnet spring (3), and the electric magnet spring that is provided above of this electric magnet spring (3) adjusts packing ring (2).
5. a kind of high pressure common rail electric control fuel injector according to claim 4, it is characterized in that: described control valve (12a) is axially shaped with meter out hole (12a1), described control valve (12a) is upper is radially shaped with meter in hole (12a2), is shaped with valve control room (12a3) in described control valve (12a).
6. a kind of high pressure common rail electric control fuel injector according to claim 5, it is characterized in that: the tapered structure of the port of export in described meter out hole (12a1), the steel ball (9) matched with described meter out hole (12a1) is arranged on ball seat (8), and this ball seat (8) is set in the lower end of the armature shaft (5e) of armature component (5).
7. a kind of high pressure common rail electric control fuel injector according to claim 6, it is characterized in that: outside the upper end of described push rod (18), be arranged with the spring seat of honour (15), be provided with oil nozzle spring between the described spring seat of honour (15) and the upper end of described oil nozzle spring (17) and adjust packing ring (16).
8. a kind of high pressure common rail electric control fuel injector according to claim 7, it is characterized in that: described injector nozzle matching parts (21) includes needle-valve body (21a) and needle-valve (21b), described needle-valve (21b) is placed through the center of described needle-valve body (21a), is shaped with atomizer inner chamber (21a1) in described needle-valve body (21a).
9. a kind of high pressure common rail electric control fuel injector according to claim 8, it is characterized in that: be provided with lift between described injector body (14) and described injector nozzle matching parts (21) and place restrictions on block (20), described lift is placed restrictions on and is provided with alignment pin (19) on block (20), this alignment pin (19) runs through described lift places restrictions on block (20), its upper end is placed in described injector body (14), and its lower end is placed in described needle-valve body (21a).
10. a kind of high pressure common rail electric control fuel injector according to claim 9, is characterized in that: described injector body (14) is exterior is furnished with O RunddichtringO (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610211851.XA CN105673287A (en) | 2016-04-07 | 2016-04-07 | High-voltage common-rail electrically-controlled oil sprayer |
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| CN201610211851.XA CN105673287A (en) | 2016-04-07 | 2016-04-07 | High-voltage common-rail electrically-controlled oil sprayer |
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| CN109139319A (en) * | 2018-09-27 | 2019-01-04 | 中国重汽集团重庆燃油喷射系统有限公司 | A kind of common-rail injector |
| CN114635819A (en) * | 2022-03-09 | 2022-06-17 | 哈尔滨工程大学 | High-pressure common rail oil injector high-speed electromagnetic valve capable of realizing stable multiple injection |
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| CN114635819B (en) * | 2022-03-09 | 2022-12-13 | 哈尔滨工程大学 | High-pressure common rail oil injector high-speed electromagnetic valve capable of realizing stable multiple injection |
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