CN104018965B - Electromagnetic Control pressure accumulation constant-voltage type oil sprayer - Google Patents
Electromagnetic Control pressure accumulation constant-voltage type oil sprayer Download PDFInfo
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- CN104018965B CN104018965B CN201410234323.7A CN201410234323A CN104018965B CN 104018965 B CN104018965 B CN 104018965B CN 201410234323 A CN201410234323 A CN 201410234323A CN 104018965 B CN104018965 B CN 104018965B
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Abstract
The object of the present invention is to provide Electromagnetic Control pressure accumulation constant-voltage type oil sprayer, comprise injector head, oil injector body, current limiting component, needle-valve Returnning spring, nozzle, needle-valve, tight cap, electromagnetic valve component and lock sleeve.The present invention adopts current limiting component structure, the fuel economy caused during lasting oil spout abnormal due to oil sprayer effectively can be avoided to decline, ensure that the reliability of oil sprayer work; Pressure accumulation chamber in oil injector body can reduce the pressure surge caused in fuel injection processes, be conducive to the accurate control to oil spout stability, simultaneously, when the present invention is used for common rail fuel combustion system, the physical dimension of common rail pipe can be reduced, thus reduce the requirement of the common rail pipe strength of materials, its working life and space availability ratio can be improved; The course of action of needle-valve is by solenoid valve Direct driver, and needle-valve fast response time, control accuracy is high, and fuel injection characteristic is flexible and changeable, effectively improves power character and the Economy of diesel engine, enables diesel engine meet stricter Abgasgesetz.
Description
Technical field
What the present invention relates to is a kind of oil sprayer, specifically diesel injector.
Background technique
Tradition mechanically controlled type oil sprayer is primarily of compositions such as oil injector body, nozzle, pintle nozzle match-ing parts, simple and functional reliability is high for major advantage with structure, but because its injection timing, injection pressure and injection rate are subject to the restriction of high-pressure fuel-feed pump cam face, therefore there are injection characteristics dumb, low-response, to the not high deficiency of fuel injection quantity control accuracy, along with the increasingly stringent of Abgasgesetz, it is difficult to Economy and the emission performance of improving motor further, also can not meet the requirement of market today to motor.
The electromagnetic control type oil sprayer being applied to Electronic Control for Fuel Injection System of Diesel Engine is faster compared to mechanically controlled type oil sprayer speed of response, and injection characteristics are controlled flexibly, also more accurate to the control of fuel injection quantity.Although the emission performance of electromagnetic control type oil sprayer to diesel engine makes moderate progress, also come with some shortcomings: owing to there is control piston above needle-valve, it serves certain restrictive function to the speed of response improving oil sprayer further; Meanwhile, owing to Turbulence Flow can be caused to aggravate in the working procedure such as oil sprayer oil spout and oil-break, cause the pressure surge that injection system is violent, make injection pressure and injection rate also occur larger fluctuation, add difficulty to the accurate control of fuel injection quantity.
Summary of the invention
The Electromagnetic Control pressure accumulation constant-voltage type oil sprayer of working stability when the object of the present invention is to provide flexible, the little fuel injection quantity of fuel injection characteristic to spray.
The object of the present invention is achieved like this:
Electromagnetic Control pressure accumulation constant-voltage type oil sprayer of the present invention, it is characterized in that: comprise injector head, oil injector body, valve seat, needle-valve limiting stopper, nozzle, current limiting component, electromagnetic valve component, injector head is arranged on oil injector body, fuel inlet is had in injector head, pressure accumulation chamber is had in oil injector body, pressure accumulation chamber communicates with fuel inlet, oil injector body, valve seat, needle-valve limiting stopper, nozzle is connected from top to bottom successively, current limiting component comprises and is arranged on limiting stopper below pressure accumulation chamber and current limliting piston, the upper and lower of current limliting piston is overlapped respectively damping spring and limiting piston Returnning spring, damping spring withstands on limiting stopper, limiting piston Returnning spring withstands on oil injector body, limiting stopper has main oil through, fuel chamber and throttle orifice is had in current limliting piston, pressure accumulation chamber, main oil through, fuel chamber, throttle orifice communicates successively, electromagnetic valve component comprises electromagnet, control valve rod, control valve rod Returnning spring, valve seat groove is set in valve seat, electromagnet is arranged in valve seat groove, in electromagnet, coil is installed, control valve rod groove is set in electromagnet, below coil, armature is set, control valve rod to be connected with armature, control the upper-end part of driving of valve rod in control valve rod groove, arrange between valve seat and needle-valve limiting stopper and control valve rod Returnning spring groove, control the underpart of valve rod through valve seat, be positioned at and control in valve rod Returnning spring groove, control valve rod arranges boss, control valve rod between boss and valve seat is set with and controls valve rod Returnning spring, needle-valve chamber is set in needle-valve limiting stopper, the upper end portion cover of needle-valve has needle-valve Returnning spring, and be positioned in needle-valve chamber, needle-valve remaining part is positioned in nozzle, oil holding slot is formed between needle-valve and nozzle, oil injector body, valve seat, needle-valve limiting stopper, first-four oil circuit is set in nozzle respectively, first-four oil circuit communicates successively, current limliting piston lower end matches with the first oil circuit and makes the first oil circuit and throttle orifice be communicated with under the control of current limliting piston or disconnect, 4th oil circuit communicates with oil holding slot, in needle-valve limiting stopper, oil inlet hole is set, secondary oil through, oil inlet hole is communicated with the 3rd oil circuit and needle-valve chamber respectively, secondary oil through one end is communicated with needle-valve chamber, the secondary oil through the other end is communicated with control valve rod Returnning spring groove or disconnects under the control controlling valve rod, oil injector body has return opening, return opening communicates with control valve rod Returnning spring groove.
The present invention can also comprise:
1, limiting stopper is fixed on below pressure accumulation chamber by screw thread, controls to form oil back chamber between valve rod underpart and needle-valve limiting stopper, and arrange spill port in needle-valve limiting stopper, spill port communicates respectively at oil back chamber and return opening.
2, injector head and oil injector body are linked together by the lock sleeve be enclosed within outside it, and oil injector body, valve seat, needle-valve limiting stopper, nozzle are linked together by the tight cap be enclosed within outside it.
Advantage of the present invention is: the present invention adopts current limiting component structure, effectively can prevent oil sprayer from occurring abnormal lasting oil spout, ensure that reliability and the fuel economy of oil sprayer work; The present invention directly controls releasing of needle-valve Returnning spring place chamber inner high voltage fuel oil by solenoid valve, and then Direct driver is carried out to needle-valve, and be conducive to the quick response of needle-valve, high to the control accuracy of needle-valve, fuel injection characteristic is flexible, effectively improves power character and the Economy of diesel engine; Pressure accumulation cavity configuration on oil injector body can effectively reduce the pressure surge caused in oil sprayer working procedure, is conducive to the accurate control to fuel injection quantity, can improve the oil spout stability of oil sprayer when little fuel injection quantity operating mode work further.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is current limiting component schematic enlarged-scale view of the present invention;
Fig. 3 is electromagnetic valve component schematic enlarged-scale view of the present invention.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
Composition graphs 1 ~ 3, a kind of Electromagnetic Control pressure accumulation of the present invention constant-voltage type oil sprayer, it is made up of injector head 1, oil injector body 2, current limiting component 3, needle-valve Returnning spring 5, nozzle 9, needle-valve 10, tight cap 12, electromagnetic valve component 13 and lock sleeve 15.Oil injector body 2 has pressure accumulation chamber 14, pressure accumulation chamber 14 is connected with the main oil through 23 that the fuel inlet 17 that injector head 1 has and limiting stopper 18 have respectively, current limliting piston 22 two ends are connected with current limliting piston reset spring 20 with damping spring 19 respectively, current limliting piston 22 has throttle orifice 21, needle-valve 10 is compacted on the pintle valve seat of nozzle 9 by needle-valve Returnning spring 5, the chamber at needle-valve Returnning spring 5 place is connected with time oil through 29 with oil inlet hole 11 respectively, oil inlet hole 11 is connected with the oil circuit on oil injector body 2, lifting and taking a seat of control valve rod 26 controls the break-make of time oil through 29 and drain tap 27, spill port 28 is communicated with drain tap 27 and by controlling between valve rod 26 and valve seat fuel oil in clearance leakage to the chamber of lower end.
Fig. 1 is the overall structure schematic diagram of Electromagnetic Control pressure accumulation constant-voltage type oil sprayer of the present invention, comprises injector head 1, oil injector body 2, current limiting component 3, needle-valve Returnning spring 5, nozzle 9, needle-valve 10, tight cap 12, electromagnetic valve component 13 and lock sleeve 15.Oil injector body 2 has pressure accumulation chamber 14, injector head 1 has fuel inlet 17 and the fastening bolt holes 16 for the clamping bolt of installing fixing fuel injector, injector head 1 cover 15 that is locked is locked on oil injector body 2, pressure accumulation chamber 14 is connected with the main oil through 23 that fuel inlet 17 and limiting stopper 18 have respectively, needle-valve Returnning spring 5 compresses on the pintle valve seat on needle-valve 10 to nozzle 9, oil holding slot 6 is formed between needle-valve 10 and nozzle 9, the chamber at needle-valve Returnning spring 5 place is connected with time oil through 29 with oil inlet hole 11 respectively, oil inlet hole 11 is connected with the high-pressure oil passage on oil injector body 2, solenoid valve passes through lifting of control valve rod 26 and takes a seat to control the break-make of time oil through 29 and drain tap 27, and then the switching in control oil sprayer between high low pressure oil circuit.Pressure accumulation chamber 14 in oil injector body 2 can reduce the fuel pressure fluctuation caused in oil sprayer working procedure, and be conducive to the accurate control of ECU (Electrical Control Unit) to fuel injection quantity, the control accuracy especially for little oil mass can significantly improve.Simultaneously, when the present invention is applied in high pressure common rail fuel injection system, the pressure stabilization function in pressure accumulation chamber 14 can make the size of common rail for diesel engine pipe to a certain degree reduced, this is conducive to the requirement reducing common rail pipe high-strength material, improve its working life, and the installing space of common rail pipe can be saved.
Limiting stopper 18, damping spring 19, current limliting piston reset spring 20, throttle orifice 21, current limliting piston 22 and main oil through 23 together constitute the current limiting component 3 of Electromagnetic Control pressure accumulation constant-voltage type oil sprayer, as shown in Figure 2.Current limliting piston 22 two ends are connected with current limliting piston reset spring 20 with damping spring 19 respectively, damping spring 19 upper end with limiting stopper 18 for spring seat, limiting stopper 18 has main oil through 23, side, current limliting piston 22 underpart has throttle orifice 21, centre has fuel chamber, this fuel chamber upper end is connected with pressure accumulation chamber 14 by main oil through 23, lower end is connected with oil inlet hole 11 with oil holding slot 6 by throttle orifice 21, limiting stopper 18 is fixed on oil injector body 2 by screw thread, and plays restriction to current limliting piston 22 maximum displacement upwards.During the normal oil spout of oil sprayer, high pressure fuel in oil sprayer is injected to firing chamber combustion by spray orifice 7, due to the ejection of fuel oil, current limliting piston 22 throttle orifice 21 end pressure reduces, and end pressure is larger on the current limliting piston 22 being communicated with pressure accumulation chamber 14, current limliting piston 22 moves downward a segment distance due to two ends pressure reduction, to compensate the oil mass of ejection, the sealing but current limliting piston 22 can not be taken a seat downwards, after end of injection, current limliting piston 22 returns to initial position due to the effect of current limliting piston reset spring 20, is supplemented the fuel oil of ejection by throttle orifice 21; When spray orifice 7 is often opened, there is the abnormal oil spout continued in oil sprayer, when the oil mass flowed out from pressure accumulation chamber 14 exceedes maximum oil mass, because the oil mass flowing through current limliting piston 22 is large, current limliting piston 22 is pressed on the valve seat of throttle orifice 21 end due to the pressure difference at two ends from position of rest, and sealed seat surface, now effectively prevent the waste of fuel oil during oil sprayer malfunction.
Solenoid valve electrical connector 24, coil 25, control valve rod 26, drain tap 27, spill port 28, secondary oil through 29, control valve rod Returnning spring 30, stop ring 31, armature 32 and electromagnet 33 together constitute the electromagnetic valve component 13 of Electromagnetic Control pressure accumulation constant-voltage type oil sprayer, as shown in Figure 3.Coil 25 is connected with engine electric-controlled unit by solenoid valve electrical connector 24, and then control rising and falling of valve rod 26, armature 32 is fixed on by stop ring 31 and controls on valve rod 26, and move therewith, controlling valve rod 26 is compacted on valve seat by controlling valve rod Returnning spring 30, secondary oil through 29 is by controlling the drain tap 27 that is turned on or off that lifts and take a seat of valve rod 26, and then realizing the conversion of high low pressure fuel path in the present invention, spill port 28 is communicated with drain tap 27 and due to fuel oil in the chamber under controlling to leak between valve rod 26 and valve seat.
During diesel engine work, high pressure fuel enters the pressure accumulation chamber 14 in oil injector body 2 by the fuel inlet 17 on injector head 1, current limiting component 3 part through being connected with pressure accumulation chamber 14 enters in oil holding slot 6, and another part is entered in the chamber at needle-valve Returnning spring 5 place by oil inlet hole 11.When after the energising fuel injection signal that electromagnetic valve coil 25 receives from ECU (Electrical Control Unit), armature 32 is attracted due to electromagnetic force, move upward, pull control valve rod 26 to move upward simultaneously, control valve rod 26 and depart from valve seat, secondary oil through 29 is communicated with drain tap 27, draining oil circuit is opened, the chamber inner high voltage fuel oil at needle-valve Returnning spring 5 place enters in low pressure oil way by the return opening 4 on oil injector body 2, because oil inlet hole 11 is less than time oil through 29, therefore the chamber fuel pressure at needle-valve Returnning spring 5 place reduces rapidly, now oil holding slot 6 internal pressure is greater than the cavity pressure at needle-valve Returnning spring 5 place, the elastic force that hydraulic coupling upwards suffered by needle-valve 10 is greater than downward hydraulic coupling suffered by it and needle-valve Returnning spring 5 is made a concerted effort, needle-valve 10 leaves needle valve seat surface and lifts, oil sprayer commencement of fuel injection.When electromagnetic valve coil 25 power-off, control valve rod 26 takes a seat to valve seat under the elastic force effect controlling valve rod Returnning spring 30, disconnect secondary path between oil through 29 and drain tap 27, close oil sprayer draining oil circuit, fuel pressure now in chamber, needle-valve Returnning spring 5 place recovers equal with the fuel pressure in oil holding slot 6, needle-valve 10 is taken a seat under the spring-force driven dual of needle-valve Returnning spring 5, oil sprayer end of injection.
From above-mentioned working procedure, in the injection process of Electromagnetic Control pressure accumulation constant-voltage type oil sprayer of the present invention, the action response of its needle-valve 10 coordinates solenoid valve directly to drive by high pressure fuel, quick action, control accuracy is high, fuel injection characteristic is flexible and changeable, effectively improves power character and the Economy of diesel engine, enables diesel engine meet stricter Abgasgesetz; Pressure accumulation chamber 14 can reduce the pressure surge caused in fuel injection processes, is conducive to the accurate control to fuel injection quantity, simultaneously, when oil sprayer is applied to Common rail fuel injection system, the physical dimension of common rail pipe can be reduced, thus reduce the requirement of the common rail pipe strength of materials, improve its working life; Adopt current limiting component structure, the fuel economy caused due to the abnormal lasting oil spout of oil sprayer effectively can be avoided to decline, ensure that the reliability of work of the present invention.
Electromagnetic Control pressure accumulation constant-voltage type oil sprayer of the present invention comprises injector head, oil injector body, current limiting component, needle-valve Returnning spring, nozzle, needle-valve, tight cap, electromagnetic valve component and lock sleeve.Oil injector body has pressure accumulation chamber, pressure accumulation chamber is connected with the main oil through that the fuel inlet that injector head has and limiting stopper have respectively, current limiting component is arranged in oil injector body, current limliting piston two ends are connected with current limliting piston reset spring with damping spring respectively, current limliting piston has throttle orifice and axial fuel chamber, the chamber at needle-valve Returnning spring place is connected with time oil through with oil inlet hole respectively, and oil inlet hole is connected with the oil circuit on oil injector body.
Current limiting component comprises limiting stopper, damping spring, current limliting piston reset spring and current limliting piston, and the number of throttle orifice is even number and is symmetrical in oil sprayer axis arranged, and the axial fuel chamber that current limliting piston has is one and is communicated with throttle orifice.
Claims (3)
1. Electromagnetic Control pressure accumulation constant-voltage type oil sprayer, it is characterized in that: comprise injector head, oil injector body, valve seat, needle-valve limiting stopper, nozzle, current limiting component, electromagnetic valve component, injector head is arranged on oil injector body, fuel inlet is had in injector head, pressure accumulation chamber is had in oil injector body, pressure accumulation chamber communicates with fuel inlet, oil injector body, valve seat, needle-valve limiting stopper, nozzle is connected from top to bottom successively, current limiting component comprises and is arranged on limiting stopper below pressure accumulation chamber and current limliting piston, the upper and lower of current limliting piston is overlapped respectively damping spring and limiting piston Returnning spring, damping spring withstands on limiting stopper, limiting piston Returnning spring withstands on oil injector body, limiting stopper has main oil through, fuel chamber and throttle orifice is had in current limliting piston, pressure accumulation chamber, main oil through, fuel chamber, throttle orifice communicates successively, electromagnetic valve component comprises electromagnet, control valve rod, control valve rod Returnning spring, valve seat groove is set in valve seat, electromagnet is arranged in valve seat groove, in electromagnet, coil is installed, control valve rod groove is set in electromagnet, below coil, armature is set, control valve rod to be connected with armature, control the upper-end part of driving of valve rod in control valve rod groove, arrange between valve seat and needle-valve limiting stopper and control valve rod Returnning spring groove, control the underpart of valve rod through valve seat, be positioned at and control in valve rod Returnning spring groove, control valve rod arranges boss, control valve rod between boss and valve seat is set with and controls valve rod Returnning spring, needle-valve chamber is set in needle-valve limiting stopper, the upper end portion cover of needle-valve has needle-valve Returnning spring, and be positioned in needle-valve chamber, needle-valve remaining part is positioned in nozzle, oil holding slot is formed between needle-valve and nozzle, oil injector body, valve seat, needle-valve limiting stopper, first-four oil circuit is set in nozzle respectively, first-four oil circuit communicates successively, current limliting piston lower end matches with the first oil circuit and makes the first oil circuit and throttle orifice be communicated with under the control of current limliting piston or disconnect, 4th oil circuit communicates with oil holding slot, in needle-valve limiting stopper, oil inlet hole is set, secondary oil through, oil inlet hole is communicated with the 3rd oil circuit and needle-valve chamber respectively, secondary oil through one end is communicated with needle-valve chamber, the secondary oil through the other end is communicated with control valve rod Returnning spring groove or disconnects under the control controlling valve rod, oil injector body has return opening, return opening communicates with control valve rod Returnning spring groove.
2. Electromagnetic Control pressure accumulation constant-voltage type oil sprayer according to claim 1, it is characterized in that: limiting stopper is fixed on below pressure accumulation chamber by screw thread, control to form oil back chamber between valve rod underpart and needle-valve limiting stopper, arrange spill port in needle-valve limiting stopper, spill port communicates respectively at oil back chamber and return opening.
3. Electromagnetic Control pressure accumulation constant-voltage type oil sprayer according to claim 1 and 2, it is characterized in that: injector head and oil injector body are linked together by the lock sleeve be enclosed within outside it, oil injector body, valve seat, needle-valve limiting stopper, nozzle are linked together by the tight cap be enclosed within outside it.
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| CN201410234323.7A CN104018965B (en) | 2014-05-29 | 2014-05-29 | Electromagnetic Control pressure accumulation constant-voltage type oil sprayer |
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| CN104018965B true CN104018965B (en) | 2016-03-09 |
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| CN106593726A (en) * | 2017-01-18 | 2017-04-26 | 哈尔滨工程大学 | Resonant electrically controlled oil injector with oil fed through double paths |
| CN106762283A (en) * | 2017-01-18 | 2017-05-31 | 哈尔滨工程大学 | A kind of two-way oil-feed resonant mode electric-controlled fuel injector with ditch |
| CN106545449A (en) * | 2017-01-18 | 2017-03-29 | 哈尔滨工程大学 | A kind of On Fluctuations oil return electric-controlled fuel injector |
| CN106762282A (en) * | 2017-01-18 | 2017-05-31 | 哈尔滨工程大学 | Bypass type electric-controlled fuel injector |
| CN106593725A (en) * | 2017-01-18 | 2017-04-26 | 哈尔滨工程大学 | Resonance type electronic fuel injector |
| CN106593722A (en) * | 2017-01-18 | 2017-04-26 | 哈尔滨工程大学 | Resonance hole-plate type electronic control fuel injector with carved grooves |
| CN106593723A (en) * | 2017-01-18 | 2017-04-26 | 哈尔滨工程大学 | Double-path oil inlet bypass type electric control oil sprayer |
| CN110513225A (en) * | 2019-09-29 | 2019-11-29 | 中船动力研究院有限公司 | A kind of electric-controlled fuel injector |
| CN114151239B (en) * | 2021-11-19 | 2023-07-21 | 哈尔滨工程大学 | Direct control type double-valve ammonia fuel injector |
| CN114165371B (en) * | 2021-12-17 | 2023-05-05 | 中国船舶集团有限公司第七一一研究所 | Fluid ejector |
| CN114458498B (en) * | 2022-02-24 | 2022-10-28 | 哈尔滨工程大学 | High-pressure common rail oil injector for realizing high-stability injection based on throttling resistance-capacitance effect |
| CN116044631B (en) * | 2023-03-31 | 2023-07-21 | 哈尔滨工程大学 | Electric control common rail fuel injector for reducing pressure fluctuation based on multistage resistance-capacitance buffering |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP3142038B2 (en) * | 1993-12-03 | 2001-03-07 | 株式会社デンソー | solenoid valve |
| JP3758318B2 (en) * | 1997-07-14 | 2006-03-22 | 日産自動車株式会社 | Engine fuel injection valve |
| JP3873068B2 (en) * | 2004-07-06 | 2007-01-24 | 三菱電機株式会社 | Fuel injection valve and its manufacturing method |
| CN103244322B (en) * | 2013-04-28 | 2015-03-11 | 哈尔滨工程大学 | Dual-fuel electromagnetic and piezoelectric control type injector |
| CN103423049B (en) * | 2013-09-06 | 2015-10-28 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Injector assembly |
| CN203925840U (en) * | 2014-05-29 | 2014-11-05 | 哈尔滨工程大学 | Electromagnetic Control pressure accumulation constant-voltage type oil sprayer |
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Effective date of registration: 20220215 Address after: 214000 industrial resettlement area, Hongshan street, New District, Wuxi City, Jiangsu Province Patentee after: WUXI GDS MACHINERY MANUFACTURING Co.,Ltd. Address before: 150001 Intellectual Property Office, Harbin Engineering University science and technology office, 145 Nantong Avenue, Nangang District, Harbin, Heilongjiang Patentee before: HARBIN ENGINEERING University |