CN201610814U - Diesel engine fuel injection electric-controlled pump nozzle - Google Patents
Diesel engine fuel injection electric-controlled pump nozzle Download PDFInfo
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- CN201610814U CN201610814U CN2010290441244U CN201029044124U CN201610814U CN 201610814 U CN201610814 U CN 201610814U CN 2010290441244 U CN2010290441244 U CN 2010290441244U CN 201029044124 U CN201029044124 U CN 201029044124U CN 201610814 U CN201610814 U CN 201610814U
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Abstract
The utility model discloses a diesel engine fuel injection electric-controlled pump nozzle, including plunger matching parts, a plunger spring, a plunger spring seat, a plunger spacer block, a circlip, an oscillating beam spacer block, a fuel oil injector nut, an electromagnetic valve and a fuel oil injector, wherein the fuel oil injector and the electromagnetic valve are overlapped inside the fuel oil injector nut from bottom to top and is in pretightening connection with the screw threads for plunger matching parts; an auxiliary pressure oil channel (including a pressure oil channel and a bypass oil channel) communicated to the fuel pressure cavity and a main pressure oil channel communicated to the fuel oil injector are arranged on the control valve seat of the pump body, 1-3 of pressure oil channel and bypass oil channel are pairwise provided. the utility model can raelize accurate and flexible control to optimum fuel injection amount, optimum fuel injection time and fuel injection pressure, improves internal combustion in engine cylinder, increases the oil feed velocity and oil feed mass, reduces the oil suction resistance, friction drag during movement of the valve core and reset load of the plunger spring, thereby reducing noxious discharging object of the engine, and improving the economical efficiency, dynamic property and intellectuality of the engine.
Description
Technical field
The utility model relates to a kind of diesel engine pump nozzle, particularly a kind of mid power electrically-controlled pump nozzle for injecting fuel of diesel motor.
Background technique
Existing injecting fuel of diesel motor device is synthetic pump of mechanical type or electronically controlled unit pump.The synthetic pump of mechanical type is made up of injection pressure controlling mechanism, fuel injection quantity controlling mechanism, injection time controlling mechanism and injection equipment.The oil sprayer of electronically controlled unit pump has independently oil pump, simplifies to some extent on the structure, but keeps pressure duct.The control accuracy of these two kinds of injection apparatus is low, very flexible, control range are narrow, can only control a few operating point, can't accurately control in all operating modes; Be subjected to the restriction of its structure and principle, the pressure duct volume is big, pipeline is long, has the pressure loss, and Injection Pump pressure is usually less than 1500bar, and residual pressure, the fluctuation of reflected wave equal pressure can cause abnormal injection; Various straight troughs, skewed slot are arranged on the plunger, increased leakage, reduced strength and stiffness, the pump end pressure is difficult to bring up to more than the 1300bar.Owing to there are these deficiencies, the synthetic pump of mechanical type can't reach Europe III and above emission standard.Electronically controlled unit pump has also limited the raising of injection pressure and the reduction of emission standard.
The model utility content
At the deficiency that exists on the prior art, the utility model purpose is to be to provide a kind of diesel engine fuel-firing electrically-controlled pump nozzle by electronic control unit (ECU) control, oil sprayer and Injection Pump are directly linked together, reduce the noxious emission of motor, improve Economy, the power character and intelligent of motor, satisfy Europe III and above emission standard.
The technical solution of the utility model is:
A kind of electrically-controlled pump nozzle for injecting fuel of diesel motor, comprise the pump housing, plunger coupled parts, piston spring seat, piston spring, circlip, plunger cushion block, rocker cushion block, oil sprayer nut, solenoid valve and oil sprayer, described oil sprayer and solenoid valve are stacked in the oil sprayer nut from bottom to top, and with plunger coupled parts with the pre-stressed joint of screw thread; Described piston spring, circlip, rocker cushion block and plunger cushion block are fixed on the piston spring seat, and adopt lock pearl fixed limit by split washer and plunger coupled parts; Described plunger coupled parts comprises the pump housing and is arranged on the interior plunger of the pump housing; It is characterized in that, the injection time of described pump nozzle drives the high speed electromagnetic control valve by electronic control unit and limits, and described solenoid valve comprises control valve seat, be arranged on spool, the valve core spring on the spool in the control valve seat, be arranged on the electromagnet on the control valve and be arranged on automatically controlled conduction plug wire base on the pump housing; Be provided with the fuel pressure chamber in the described pump housing, be provided with aux. pressure oil duct that communicates with the fuel pressure chamber and the principal pressure oil duct that leads to oil sprayer on the described pump housing and control valve seat, described aux. pressure oil duct can be provided with 1～3 the tunnel as required; Like this, both can increase oil-feed speed and oil inlet quantity; Also can reduce the oil suction resistance of plunger when up, reduce the load that resets of piston spring; Can also be when plunger be descending the lateral pressure of balance valve core, the surface friction drag when reducing valve core movement.
Described control valve seat is communicated with pump housing pressure oil cavity and oil sprayer by oil inlet hole, aux. pressure oil duct, principal pressure oil duct, adopt the Spielpassung guiding between control valve seat and the spool, the sealing configuration that described control valve seat contacts with the sealing valve port position employing line face of spool.
As a kind of preferred version, described aux. pressure oil duct comprises bypass oil duct and pressure oil duct; Described principal pressure oil duct directly leads to oil sprayer from pump housing oil pocket, and has the bypass oil duct to communicate with control valve body; Described pressure oil duct communicates with the principal pressure oil duct through control valve body and bypass oil duct from pump housing oil pocket; The principal pressure oil duct begins to lead to oil sprayer from pump housing pressure oil cavity always; The aux. pressure oil duct begins to take out valve through control from the pump housing and communicates with the principal pressure oil duct, can be as required by illustrated 1 the tunnel adding to 2 or 3 the tunnel now.
As a kind of preferred version, on the described pump housing, be provided with the plunger hole, the lock hole of bead, oil inlet hole and the plunger draining hole that are connected with pump housing fuel pressure chamber; The fuel pressure chamber of the described pump housing communicates with oil sprayer by the principal pressure oil duct that is communicated with up and down.
As another kind of preferred version, described solenoid valve comprises control valve seat, spool, valve core spring, electromagnet and automatically controlled conduction plug wire base; Described control valve seat adopts the Spielpassung guiding by the corresponding hole link of oil inlet hole, bypass oil duct and pressure oil duct and oil sprayer between control valve seat and the spool.
As another preferred version, described oil sprayer comprises needle valve spring seat, needle valve spring, pressure regulation pad, push rod, intermediate, needle-valve body and needle-valve; Described needle-valve body and needle-valve top are Spielpassung, and spray orifice top in lower end is a sealing cone in the needle-valve body, the sealing configuration that the sealing position of described needle-valve body end contacts with needle-valve employing line face.
Described needle-valve body inside is provided with pressure chamber, and described needle-valve middle part is designed to up big and down small variable cross section shape
So that the fuel pressure effect overcomes spring force on it and upwards promotes in the needle-valve body, open the needle-valve mouth.
As another kind of preferred version, the surface of contact up and down of described plunger coupled parts, solenoid valve and oil sprayer all adopts by the pre-tightening seal of the screw thread of oil sprayer nut and plunger coupled parts, and locatees by locating stud.
The utility model is owing to adopt the solenoid electric valve of electronic control and high-speed response, can realize the accurate and Flexible Control of best fuel injection quantity, best injection time and injection pressure, improve the engine cylinder internal combustion, thereby reduce the noxious emission of motor, improve Economy, the power character and intelligent of motor; Add the quantity of pressure oil duct and bypass oil duct (being the aux. pressure oil duct) simultaneously, and then increased oil-feed speed and oil inlet quantity, also reduced the oil suction resistance of plunger when up, reduced the load that resets of piston spring; Also can be at the lateral pressure of plunger is descending when pressing oil balance valve core, the surface friction drag when reducing valve core movement.And owing to there is not high-pressure oil pipe, be suitable for high-pressure injection, and can improve injection characteristics, it can satisfy Europe III and above emission standard, and it is low to have an oil consumption, the control accuracy height, control all can realize characteristics such as optimum fuel injection quantity and injection time under the various operating modes flexibly.
Description of drawings
Describe the utility model in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the utility model electrically-controlled pump nozzle for injecting fuel of diesel motor sectional drawing;
Fig. 2 is fuel injection of the present utility model (plunger is a descending) schematic representation;
Fig. 3 is the I enlarged view of Fig. 2;
Fig. 4 is the M enlarged view of Fig. 2;
Fig. 5 is oil-feed of the present utility model (plunger is a up) schematic representation;
Fig. 6 is the I enlarged view of Fig. 5;
Fig. 7 is the M enlarged view of Fig. 5.
Among the figure: the 1-pump housing, 2-plunger, 3-control valve seat, 4-spool and armature, 5-electromagnet, 6-valve core spring, 7-needle valve spring seat, 8-pressure regulation pad, 9-needle valve spring, the 10-push rod, 11-intermediate, 12-needle-valve body, the 13-needle-valve, 14-oil sprayer nut, 15-lower seal, the 16-locating stud, the last seal ring of 17-, 18-plug wire base, the 19-support pad, 20-compression spring, 21-piston spring seat, 22-locks pearl, the 23-piston spring, 24-open washer, 25-plunger cushion block, the 26-circlip, the 27-rocker cushion block; The A-oil inlet hole, B1-pump housing principal pressure oil duct, B2-pump housing pressure oil duct, B3-control valve seat principal pressure oil duct, B4-control valve pressure oil duct, C1-principal pressure oil duct bypass oil duct, C2-aux. pressure oil duct bypass oil duct, D-plunger draining hole, E-control valve sealing position, F-needle-valve sealing position, H-fuel pressure chamber.
Arrow is depicted as the fuel flow direction among the figure.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the utility model.
As shown in Figure 1, the utility model electrically-controlled pump nozzle for injecting fuel of diesel motor comprises the pump housing 1, plunger coupled parts, piston spring 23, piston spring seat 7, circlip 26, rocker cushion block 27, plunger cushion block 25, split washer 24, lock pearl 22, oil sprayer nut 14, solenoid valve, plug wire base 18 and oil sprayer.Described oil sprayer and solenoid valve be stacked in from bottom to top in the oil sprayer nut with plunger coupled parts with the pre-stressed joint of screw thread; Described piston spring 23, circlip 26, rocker cushion block 27 and plunger cushion block 25 are fixed on the piston spring seat 7, and adopt lock pearl 22 fixed limits by split washer 24 and plunger coupled parts; The injection time of pump nozzle drives the high speed electromagnetic control valve by electronic control unit and limits, the utility model is by the solenoid electric valve of electronic control and high-speed response, can realize the accurate and Flexible Control of best fuel injection quantity, best injection time and injection pressure, improve the engine cylinder internal combustion, thereby reduce the noxious emission of motor, improve Economy, the power character and intelligent of motor.
Referring to Fig. 1 and Fig. 2, described plunger coupled parts comprises the pump housing 1 and is installed in the plunger of installing in the pump housing 12 again; Plunger hole, the lock hole of bead, oil inlet hole A and plunger draining hole D have been made on the pump housing 1; Plunger hole and plunger lower end form fuel pressure chamber H; 2 oblique oil inlet hole A originate in the pump nozzle and go up the annular trapped fuel chamber that seal ring 17, lower seal 15 and cylinder head body form, and lead to the fuel pressure chamber H in the pump housing 1.
Solenoid valve by control valve seat 3, be installed in the electromagnet 5 on spool in the control valve seat 3 and armature 4, valve core spring 6, installation and control valve seat 3 underparts and be installed on the pump housing 1 automatically controlled conduction plug wire base 18 and form.Described control valve seat 3 is installed on the lower end surface of the pump housing 1, by the pre-tightening seal of the screw thread on the pump housing 1, and then positions by locating stud.
What deserves to be mentioned is, referring to Fig. 2, the principal pressure oil duct B1, the B3 that on the pump housing 1 and control valve seat 3, all make oil inlet hole A, the aux. pressure oil duct that communicates with the fuel pressure chamber and lead to oil sprayer; Described aux. pressure oil duct is provided with 2 or 3; Like this, both can increase oil-feed speed and oil inlet quantity; Also can reduce the oil suction resistance of plunger when up, reduce the load that resets of piston spring; Can also be when plunger be descending the lateral pressure of balance valve core, the surface friction drag when reducing valve core movement.
In the present embodiment, referring to Fig. 3 and Fig. 6, described aux. pressure oil duct comprises pressure oil duct B2, the pressure oil duct B4 on the control valve seat 3 and bypass oil duct C1, the C2 that is arranged on the pump housing 1; Pressure oil duct B2, B4 and bypass oil duct C2 (being the aux. pressure oil duct) can increase to 2～3 diametrically as required, and described principal pressure oil duct B1, B3 directly lead to oil sprayer from the fuel pressure chamber H of pump housing D, and have bypass oil duct C2 to communicate with control valve body; Described pressure oil duct B2, B4 communicate with principal pressure oil duct B3 through control valve body and bypass oil duct C1, C2 from pump housing fuel pressure chamber H; Principal pressure oil duct B1, B3 begin to lead to oil sprayer from pump housing pressure oil cavity H always; Pressure oil duct B2, B4 take out valve from the pump housing 1 beginning through control and communicate with principal pressure oil duct B1, B3, and the pressure oil duct can increase to 2 or 3 the tunnel, has increased oil-feed speed and oil inlet quantity, has reduced the oil suction resistance when plunger is up, reduces the load that resets of piston spring.。
Bypass oil duct C1, C2 can also increase by 2 bypass oil ducts diametrically, and are arranged on the control valve seat 3, are communicated with pressure oil duct B2, B4 and control valve seat 3 oil pockets; Oil inlet hole A is communicated with control valve seat oil pocket and the outside trapped fuel of pump nozzle chamber.Control valve seat 3 is by locating stud 16 and part location up and down, needle valve spring seat 7 end faces of control valve seat 3 top and bottom and the pump housing 1 bottom surface and oil sprayer are processed as the surface of contact of high precision planeness and parallelism, form sealing under oil sprayer nut 14 is threaded the pretightening force effect.
Spool and armature 4 are the Spielpassung guiding with control valve seat 3, and form the sealing valve port (referring to Fig. 3 and Fig. 6) of line face contact at control valve sealing E place, position; The lead pin of electromagnet 5 is connected in the pin hole of automatically controlled conduction plug wire base 18 by hole on the pump housing 1, and plug wire base 18 is connected with electronic control unit (ECU) by line, and its top is fixed by support pad 19; The emitted dose of the utility model fuel oil and discharge time are controlled by the control valve that electronic control unit (ECU) drives.
It should be noted that oil sprayer comprises in the present embodiment: needle valve spring seat 7, be installed in needle valve spring 9, the pressure regulation pad 8 on the needle valve spring seat 7, the push rod 10 that is installed in needle valve spring seat 7 ends, intermediate 11, needle-valve body 12 and needle-valve 13; This pressure regulation pad 8 is installed in needle valve spring 9 upper ends, push rod 10 is installed in needle valve spring 9 lower ends, needle-valve body 12 is installed on the lower end surface of intermediate, needle-valve 13 is installed in the lower end of this needle-valve body 12, described needle-valve body 12 is the Spielpassung guiding with needle-valve 13 tops, and in needle-valve body 12 sealing cone (referring to Fig. 4 and Fig. 7), the sealing configuration that its sealing position F contacts with needle-valve 13 employing line faces, the opening and closing of sealing of the present utility model position F are in order to regulate fuel injection quantity and injection time.
Be shaped on oil pocket in the middle of needle-valve body 12, needle-valve 13 middle parts are designed to up big and down small variable cross section shape, so that the fuel pressure effect overcomes spring force on it and upwards promotes needle-valve 13 in the needle-valve body oil pocket, open nozzle opening.The pressure oil duct B of part also formed the surface of contact sealing with it about intermediate 11 was communicated with, the maximum opening travel of bottom surface restriction needle-valve 13.Be needle valve spring seat 7, pressure regulation pad 8 and pressure adjusting spring 9 on intermediate 11, this pressure adjusting spring 9 is installed on the push rod 10 of needle-valve 13 upper ends, in order to the opening and closing of control and metering pin valve 13.Between the part upper-lower seal face of oil sprayer with and and the sealing surface of control valve body bottom between all adopt straight pin location, high precision plane pressure sealing.
Of the present utility model when work, the pressure that plunger 2 transmits by rocker cushion block 27 by cam drive, compresses fuel oil in pump housing oil pocket.When control valve sealing valve port E place closes (shown in Fig. 2,3), high pressure fuel enters oil sprayer idol part needle-valve body 12 oil pockets by principal pressure oil duct B1, the B3 that is communicated with up and down, the spring force that the high pressure that fuel oil produces overcomes needle valve spring 9 moves up needle-valve 13, and needle-valve conical surface edge, 13 lower end and needle-valve body 12 conical surface seal mouth F places open (as shown in Figure 4) high pressure fuel and spray into the firing chamber by the valve body lower end spray orifice; At end of injection, the pressure on the plunger 2 is withdrawn, when open at control valve E place (as shown in Figure 5), on the one hand, needle-valve body 12 oil pocket pressure descend rapidly, and needle-valve 13 is moved down by the active force of needle valve spring 9, close sealed mouth F (as shown in Figure 7), oil sprayer stops oil spout.On the other hand, plunger 2 moves up (as shown in Figure 5) under the elastic force effect of piston spring 23, form relative vacuum in the pump housing oil pocket, fuel oil is by oil inlet hole A, be inhaled into pump housing oil pocket H (shown in Fig. 5,6) through control valve sealing E place, position, principal pressure oil duct C1-B3-B1 and aux. pressure oil duct C2-B4-B2 (can increase to 2 ~ 3), for the oil spout of pressurizeing is got ready next time.
Close and the unlatching of control valve are regulated control by electronic control unit (ECU).ECU carries out best fuel Injection Control according to the detected engine speed of speed probe and crank angle, throttle sensor signal and other sensor signals that are installed in flywheel and cam region of interest, by the control electromagnet to the adhesive of spool and put from, realize closing and opening of control valve, thus the fuel injection quantity and the injection time of regulating and controlling pump nozzle the best.
The pump nozzle is controlled by electronic control unit (ECU), can be in all operating modes, operation intention by sensor acquisition vehicle and engine operation condition and driver, ECU is according to the signal of sensor input, change the flow direction of high pressure fuel by the electro-magnet switch control valve, in the suitable moment, the high pressure fuel direct injection is entered cylinder.Because cancelled the skewed slot of high-pressure oil pipe and plunger adjusted oil mass, high pressure volume reduces, and has exempted the fuel pressure loss, has reduced leakage, has improved rigidity and intensity, the volume of pump nozzle is reduced, the designs simplification compactness.Fuel-injection pressure can reach more than the 1500bar, can reach Europe III, Europe IV even Euro V emissions, and environmental-protecting performance greatly improves; The pump nozzle directly adopts cam drive, fuel feeding when oil spout only, and driving torque is low, and consumed power is little; Electrically-controlled pump nozzle is lower than the cost of monoblock pump and the synthetic pump of mechanical type, and sexual valence is higher; Its power wide coverage is fit to use and marine diesel engine and generator set to heavy goods vehicles usefulness, locomotive from light-duty.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. electrically-controlled pump nozzle for injecting fuel of diesel motor, comprise the pump housing, plunger coupled parts, piston spring seat, piston spring, circlip, plunger cushion block, rocker cushion block, oil sprayer nut, solenoid valve and oil sprayer, described oil sprayer and solenoid valve are stacked in the oil sprayer nut from bottom to top, and with plunger coupled parts with the pre-stressed joint of screw thread; Described piston spring, circlip, rocker cushion block and plunger cushion block are fixed on the piston spring seat, and adopt lock pearl fixed limit by split washer and plunger coupled parts; Described plunger coupled parts comprises the pump housing and is arranged on the interior plunger of the pump housing; It is characterized in that, the injection time of described pump nozzle drives the high speed electromagnetic control valve by electronic control unit and limits, and described solenoid valve comprises control valve seat, be arranged on spool, the valve core spring on the spool in the control valve seat, be arranged on the electromagnet on the control valve and be arranged on automatically controlled conduction plug wire base on the pump housing; Be provided with the fuel pressure chamber in the described pump housing, be provided with aux. pressure oil duct that communicates with the fuel pressure chamber and the principal pressure oil duct that leads to oil sprayer on the described pump housing and control valve seat, described aux. pressure oil duct is provided with 2 or 3; Described control valve seat is communicated with pump housing pressure oil cavity and oil sprayer by oil inlet hole, aux. pressure oil duct, principal pressure oil duct, adopt the Spielpassung guiding between control valve seat and the spool, the sealing configuration that described control valve seat contacts with the sealing valve port position employing line face of spool.
2. electrically-controlled pump nozzle for injecting fuel of diesel motor according to claim 1, it is characterized in that, the surface of contact up and down of described plunger coupled parts, solenoid valve and oil sprayer is all by the pre-tightening seal of the screw thread of oil sprayer nut and plunger coupled parts, and locatees by locating stud.
3. electrically-controlled pump nozzle for injecting fuel of diesel motor according to claim 1 is characterized in that, also is provided with the plunger hole, the lock hole of bead, oil inlet hole and the plunger draining hole that are connected with fuel pressure chamber in the pump housing on the described pump housing; Fuel pressure chamber in the described pump housing communicates with oil sprayer by the principal pressure oil duct that is communicated with up and down.
4. electrically-controlled pump nozzle for injecting fuel of diesel motor according to claim 3 is characterized in that, described oil sprayer comprises needle valve spring seat, needle valve spring, pressure regulation pad, push rod, intermediate, needle-valve body and needle-valve; Described needle-valve body and needle-valve top are Spielpassung, and spray orifice top in lower end is a sealing cone in the needle-valve body, the sealing configuration that the sealing position of described needle-valve body end contacts with needle-valve employing line face.
5. electrically-controlled pump nozzle for injecting fuel of diesel motor according to claim 4 is characterized in that, described needle-valve body inside is provided with pressure chamber, and described needle-valve middle part is set to up big and down small variable cross section shape.
6. electrically-controlled pump nozzle for injecting fuel of diesel motor according to claim 1 is characterized in that, described principal pressure oil duct directly leads to oil sprayer from pump housing oil pocket, and has the bypass oil duct to communicate with control valve body; Described aux. pressure oil duct comprises bypass oil duct and pressure oil duct, communicates with the principal pressure oil duct through control valve body and bypass oil duct from pump housing oil pocket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010290441244U CN201610814U (en) | 2010-02-08 | 2010-02-08 | Diesel engine fuel injection electric-controlled pump nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010290441244U CN201610814U (en) | 2010-02-08 | 2010-02-08 | Diesel engine fuel injection electric-controlled pump nozzle |
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| Publication Number | Publication Date |
|---|---|
| CN201610814U true CN201610814U (en) | 2010-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010290441244U Expired - Lifetime CN201610814U (en) | 2010-02-08 | 2010-02-08 | Diesel engine fuel injection electric-controlled pump nozzle |
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| CN (1) | CN201610814U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240179A (en) * | 2015-10-23 | 2016-01-13 | 无锡惠发特精密机械有限公司 | Oil injector of diesel engine |
| CN106609719A (en) * | 2016-12-31 | 2017-05-03 | 南岳电控（衡阳）工业技术股份有限公司 | Fuel injector for high-pressure common rail fuel injection system |
| WO2018133444A1 (en) * | 2017-01-18 | 2018-07-26 | 江苏易实精密科技股份有限公司 | Guide bushing of diesel high pressure fuel injector |
-
2010
- 2010-02-08 CN CN2010290441244U patent/CN201610814U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240179A (en) * | 2015-10-23 | 2016-01-13 | 无锡惠发特精密机械有限公司 | Oil injector of diesel engine |
| CN106609719A (en) * | 2016-12-31 | 2017-05-03 | 南岳电控（衡阳）工业技术股份有限公司 | Fuel injector for high-pressure common rail fuel injection system |
| CN106609719B (en) * | 2016-12-31 | 2022-05-10 | 南岳电控（衡阳）工业技术股份有限公司 | Oil sprayer for high-pressure common rail fuel injection system |
| WO2018133444A1 (en) * | 2017-01-18 | 2018-07-26 | 江苏易实精密科技股份有限公司 | Guide bushing of diesel high pressure fuel injector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20101020 Effective date of abandoning: 20111221 |