CN104806404A - Double-acting piezoelectric type normally closed electronic unit pump - Google Patents
Double-acting piezoelectric type normally closed electronic unit pump Download PDFInfo
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- CN104806404A CN104806404A CN201510212764.1A CN201510212764A CN104806404A CN 104806404 A CN104806404 A CN 104806404A CN 201510212764 A CN201510212764 A CN 201510212764A CN 104806404 A CN104806404 A CN 104806404A
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- 239000013078 crystal Substances 0.000 claims abstract description 37
- 239000000446 fuel Substances 0.000 claims description 87
- 230000006835 compression Effects 0.000 claims description 26
- 238000007906 compression Methods 0.000 claims description 26
- 235000006040 Prunus persica var persica Nutrition 0.000 claims description 23
- 244000144730 Amygdalus persica Species 0.000 claims description 19
- 125000006850 spacer group Chemical group 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 240000005809 Prunus persica Species 0.000 claims description 4
- 239000003921 oil Substances 0.000 abstract description 83
- 239000000295 fuel oil Substances 0.000 abstract description 31
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002153 concerted effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000001473 noxious effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
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Abstract
The invention aims to provide a double-acting piezoelectric type normally closed electronic unit pump; the double-acting piezoelectric type normally closed electronic unit pump comprises a double-peach cam, a roller plunger, a normally closed piezoelectric fuel oil control valve, a fuel oil line reversing valve and a double oil discharge valve; the normally closed piezoelectric fuel oil control valve is installed above the plunger and comprises a piezoelectric crystal, a control valve rod, an oil drainage cone valve and an oil drainage cone valve spring; the fuel oil line reversing valve is mounted above the normally closed piezoelectric fuel oil control valve and comprises an electromagnetic valve, a front reversing valve rod, a reversing valve and a rear reversing valve rod, as well as a fuel oil path spacing block. Because the normally closed piezoelectric fuel oil control valve is controlled by the piezoelectric crystal, compared with the control of the traditional high-speed electromagnetic valve, the control speed is faster, the control flexibility is higher, and the control accuracy is higher; by the normally closed piezoelectric fuel oil control valve, the supply problem of the fuel oil under the conditions that an engine is powered down and the like can be solved; when the piezoelectric crystal breaks down, the oil drainage cone valve is pushed open by the excessive fuel oil pressure, thereby accomplishing oil drainage and pressure releasing functions.
Description
Technical field
What the present invention relates to is a kind of fueling injection equipment, specifically motor fueling injection equipment.
Background technique
Along with the progress of human society, the development of Modern Engine is had to the dual-pressure in the face of energy crisis and environmental pollution bring, and motor emission standard improves constantly, and this makes development of engine must towards the direction of energy-saving and emission-reduction.And utilizing electronic control to realize having become the control of engine fuel injection system the developing trend of motor, electronically controlled unit pump technology is a kind of important technical.Electronically controlled unit pump is a kind of time-based control fuel injection system meeting motor Abgasgesetz and cost-effectiveness requirement, has that injection pressure is high, a flexible feature such as adjustable of injection timing.
Tradition electronically controlled unit pump adopts common normal-open electromagnetic valve to control fuel oil draining oil circuit, and when common normal-open electromagnetic valve does not power on, the draining oil circuit of valve is in normally open, and the fuel oil in monoblock pump flows back to fuel tank by draining oil circuit.After solenoid valve powers on, close draining oil circuit by electromagnetic force, the fuel oil after plunger pressurization flow to oil sprayer through normally open valve.But traditional electronically controlled unit pump exists following not enough: one, monoblock pump inefficiency, camshaft rotates a circle the oil supply function that can only complete an oil sprayer; Its two, if simple change cam profile is two peach cams, camshaft rotates a circle the fuel injection quantity of the more than one oil sprayer of supplied fuel oil, reduces causing the efficiency of engine fuel oil system; Its three, traditional electronically controlled unit pump, can only complete the controlling functions to single control valve, is difficult to meet motor requirement to fuel injection processes under different working condition; Its four, conventional solenoid valve control fuel path, compared to piezoelectric crystal control, speed of response is limited, and control accuracy is limited; Its five, when solenoid valve failure cannot power on, draining oil circuit will be in open mode all the time, and normally open valve can not complete and control the function of fuel flow communication; Its six, if solenoid valve stuck in off position under, in valve, oil pressure can constantly raise, and causes harmful effect, cause other hydraulic pressure installation such as oil sprayer to be damaged to normally open valve and oil sprayer.Traditional electronically controlled unit pump working efficiency is lower in a word, and Security is poor, cannot meet engine operation stability, does not possess the ability of reacting in time to fault.
Summary of the invention
The object of the present invention is to provide to improve motor Economy, power character, stability and reliability, improve the normally closed electronically controlled unit pump of double-action piezoelectricity type of diesel engine working efficiency simultaneously.
The object of the present invention is achieved like this:
The normally closed electronically controlled unit pump of double-action piezoelectricity type of the present invention, is characterized in that: comprise two peach cam, roller plunger, normal close type piezoelectricity fuel regulator valve, fuel path selector valve, two outlet valve, roller plunger comprises roller, plunger, piston spring, upper plug shell, lower plunger shell, roller is arranged on the lower end of lower plunger shell, the top of plunger is positioned in upper plug shell, the bottom of plunger is positioned in lower plunger shell, piston spring is set with outside plunger, the upper end portion of piston spring withstands on upper plug shell lower end, the lower end part of piston spring is in lower plunger shell, plunger cavity is formed between the inwall of plunger and upper plug shell, upper plug shell is arranged respectively oil inlet hole, draining oil circuit and the first oil circuit, plunger cavity is communicated with oil inlet hole and the first oil circuit, normal close type piezoelectricity fuel regulator valve comprises control valve body, draining cone valve, control valve rod, piezoelectric crystal, draining cone valve spring, draining cone valve, control valve rod, piezoelectric crystal, draining cone valve spring is all arranged in control valve body, draining cone valve first end withstands on draining cone valve spring, draining cone valve second end is connected with piezoelectric crystal by controlling valve rod, the second oil circuit communicated with the first oil circuit is set in control valve body, draining cone valve spring place communicates with draining oil circuit, the tapered end face of draining cone valve second end and the cone match of control valve body inside, when piezoelectric crystal is not energized, the tapered end face of draining cone valve withstands on the conical surface of control valve body, during piezoelectric crystal energising, the tapered end face of draining cone valve leaves the conical surface of control valve body, second oil circuit is communicated with draining oil circuit, fuel path selector valve comprises electromagnetic valve body, front commutation valve rod, commutation valve body, rear commutation valve rod, fuel path spacer block, commutation valve rod before electromagnetic valve body connects, front commutation valve rod is connected with steel ball by front commutation valve rod little spring, steel ball withstands on commutation valve body, rear commutation valve rod is pressed on commutation valve body by spring, front commutation valve rod, front commutation valve rod little spring, steel ball, selector valve and rear commutation valve rod are all arranged in commutation housing, commutation housing is arranged on electromagnetic valve body, in commutation housing, the first fuel-displaced oil circuit is set, second fuel-displaced oil circuit, 3rd fuel-displaced oil circuit, first fuel-displaced oil circuit, second fuel-displaced oil circuit all communicates with the 3rd fuel-displaced oil circuit, in 3rd fuel-displaced oil circuit, fuel path spacer block is set, second oil circuit stretches in commutation housing, commutation valve body realizes communicating of the second oil circuit and the first fuel-displaced oil circuit or the second fuel-displaced oil circuit under the control of electromagnetic valve body, two outlet valve comprises the first outlet valve and the second outlet valve, and the first outlet valve is communicated with the first fuel-displaced oil circuit, and the second outlet valve is communicated with the second fuel-displaced oil circuit, two peach cam matches with roller.
The present invention can also comprise:
1, control valve rod mutually to intersect with the second oil circuit, the part controlling valve rod intersects with the second oil circuit arranges the first compression face and the second compression face respectively, first compression face and the second compression face lay respectively at draining cone valve side and the piezoelectric crystal side of the second oil circuit, and the area of the first compression face is not less than 1.2 times of the second compression face area.
2, each peach pair roller effect angular range of two peach cam is 80 ° ~ 110 °, and between two peaches, constant speed section angle is 100 ° ~ 70 °.
Advantage of the present invention is: the double-action electronically controlled unit pump in this device can realize the function to two flexible fuel feeding of oil sprayer, two peach cam can be coordinated when camshaft rotates a circle to complete the function two oil sprayers being replaced to fuel feeding, effectively can improve the working efficiency of electronically controlled unit pump, improve engine efficiency, improve motor Economy, power character, effectively can reduce noxious emission.Fuel path selector valve in this device, can realize controlling the cooperation of two outlet valve oil circuit, electromagnetic valve fuel path selector valve can improve the speed of response of selector valve, oil sprayer fuel feeding moment and fuel delivery can be controlled flexibly, meet the fuel feeding number of times of motor under different operating mode, different load, charge oil pressure needs.Fuel path selector valve also can realize the combination control of two outlet valve simultaneously, by changing electromagnetic valve signal, can realize outlet valve 25 outlet valve 26 that works and not working, outlet valve 26 outlet valve 25 that works does not work, two kinds of fuel system, thus improve the flexibility of monoblock pump.
This device also has following beneficial effect simultaneously: this device fuel regulator valve is the normally close valve that piezoelectric crystal controls, when fuel regulator valve piezoelectric crystal normally works, due to the fast response time of piezoelectric crystal, the feature that action stability is high, effectively can control fuel oil by the circulating rate of fuel regulator valve and currency, simultaneously by the control mode that fuel regulator valve piezoelectric crystal is different can realize fuel flow communication amount and circulation moment flexible control.Injection system can be made to meet the demand of motor multi-operating mode and repeatedly fuel feeding by changing fuel regulator valve piezoelectric crystal control signal, improving motor Economy, power character.This device fuel regulator valve is normal close type valve, when its piezoelectric crystal break down can not power on time, draining cone valve is in normally off, still can continue the function of fuel feeding, improves adaptability to changes and the working stability of motor in the situations such as motor power down.Simultaneously; this device fuel regulator valve is designed with protective measure; when piezoelectric crystal break down can not power on time, or when the hydraulic pressure installation such as oil sprayer connecting monoblock pump breaks down, draining cone valve is in normally off and normally closed monoblock pump internal pressure can be caused constantly to raise; but under the effect of protective measure; draining cone valve can promote draining cone valve spring, opens draining oil circuit, makes fuel oil flow back to low-pressure reservoir; reduce the fuel pressure in whole system, the safety of protection oil-fired system.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is roller piston structure schematic diagram of the present invention;
Fig. 3 a is normal close type piezoelectricity fuel regulator valve structural representation of the present invention, and Fig. 3 b is the partial schematic diagram of Fig. 3 a;
Fig. 4 a is fuel path structure of reversing valve schematic diagram of the present invention, and Fig. 4 b is one of double mode schematic diagram of fuel path selector valve, and Fig. 4 c is the double mode schematic diagram two of fuel path selector valve;
Fig. 5 is of the present invention pair of delivery valve structure schematic diagram;
Fig. 6 is of the present invention pair of peach cam structure schematic diagram.
Embodiment
Below in conjunction with accompanying drawing citing, the present invention is described in more detail:
Composition graphs 1 ~ 6, this device comprises two peach cam 1, roller plunger 2, piezoelectricity type fuel oil Controlling solenoid valve 3, fuel path selector valve 4 and two outlet valve 5.Roller plunger 2 is arranged on bottom the pump housing 6, is made up of roller 7, plunger 8, piston spring 9, plunger cavity 10, oil inlet hole 11, oil circuit 12 and draining oil circuit 13.The top of plunger cavity 10 is provided with normal close type piezoelectricity fuel regulator valve 3, comprises draining cone valve spring 14, draining cone valve 15, controls valve rod 16 and piezoelectric crystal 17.Fuel path selector valve 4 is arranged on above normal close type piezoelectricity fuel regulator valve 3, and it comprises solenoid valve 20, front commutation valve rod 21, selector valve 22 and rear commutation valve rod 23, and fuel path spacer block 24.Two outlet valve 5 is arranged on the pump housing 6 top, is made up of outlet valve 25 and outlet valve 26.
The normally closed electronically controlled unit pump of double-action piezoelectricity type of the present invention is made up of two peach cam 1, roller plunger 2, normal close type piezoelectricity fuel regulator valve 3, fuel path selector valve 4 and two outlet valve 5.Roller plunger 2 is made up of roller 7, plunger 8, piston spring 9, plunger cavity 10, oil inlet hole 11, oil circuit 12 and draining oil circuit 13.When plunger 8 is descending, suck fuel oil from oil inlet hole 11, two peach cam 1 pushing rolling wheels 7 makes plunger 8 up, after closing oil inlet hole 11, fuel oil in compression plunger chamber 10, completes fuel oil pressurization function, and the fuel oil after compression flows into normal close type piezoelectricity fuel regulator valve 3 through oil circuit 12.
Normal close type piezoelectricity fuel regulator valve 3 comprises draining cone valve spring 14, draining cone valve 15, controls valve rod 16 and piezoelectric crystal 17.Piezoelectric crystal 17 is connected by controlling valve rod 16 with draining cone valve 15.When normal close type piezoelectricity fuel regulator valve does not power on, draining cone valve 15 is subject to making a concerted effort of draining cone valve spring 14 and fuel pressure P, draining cone valve spring 14 is in compressive state, owing to being nature when piezoelectric crystal 17 does not power on, draining cone valve spring 14 makes draining cone valve 15 be landed on the conical surface to the power F1 of draining cone valve 15, the draining oil circuit of valve is in normally off, and in plunger cavity 10, fuel oil after compression flows into fuel path selector valve 4 through oil circuit L1.When piezoelectric crystal 17 powers on, piezoelectric crystal 17 produces inverse piezoelectric activity and extends, and is applied to draining cone valve 15 power F2, now F by controlling valve rod 16
2> F
1, draining oil circuit 11 is opened, and fuel oil flows back to low-pressure reservoir.Normal close type piezoelectricity fuel regulator valve 3 is controlled by piezoelectric crystal, compares and conventional high rate electromagnetic valve, and its control rate is faster, and control flexibility higher, control accuracy is higher.Normal close type piezoelectricity fuel regulator valve 3 is controlled by piezoelectric crystal, compares and conventional high rate electromagnetic valve, and its control rate is faster, and control flexibility higher, control accuracy is higher.
Fuel path selector valve 4 comprises solenoid valve 20, front commutation valve rod 21, selector valve 22 and rear commutation valve rod 23, and fuel path spacer block 24.Front commutation valve rod 21 is controlled by solenoid valve 20, and valve rod front end is connected with a small ball by front commutation valve rod little spring, and small ball withstands on selector valve 22, and the valve rod 23 that commutates after the other end is connected with selector valve 22.Selector valve 22 upper end withstands on fuel path spacer block 24.When solenoid valve 20 is not energized, selector valve 22 left end contacts with fuel path spacer block 22 right-hand member, and as shown in Figure 4 b, open left side oil circuit and close right side oil circuit, now fuel oil enters an oil sprayer through outlet valve 25; When solenoid valve 20 is energized, selector valve 22 right-hand member contacts with the left end of fuel path spacer block 24, and open right side oil circuit and close left side oil circuit, as illustrated in fig. 4 c, now fuel oil enters an oil sprayer through outlet valve 26.Therefore, fuel path selector valve can realize two kinds of different fuel oil configuration supplies.The two peach cams utilizing the present invention to design, each peach pair roller effect angle ф 1 scope is 80 ° ~ 110 °, and between two peaches, constant speed section angle ф 2 is 100 ° ~ 70 °.Cam axle completes fuel feeding for one week function to two oil sprayers can be realized.
Normal close type piezoelectricity fuel regulator valve 3 is when the situation piezoelectric crystals 17 such as motor generation power down cannot power on, and draining cone valve is in normally off, still can continue the effect of fuel feeding, can improve the reliability of oil-fired system, improves engine operation stability.When the piezoelectric crystal 17 of normal close type piezoelectricity fuel regulator valve 3 break down cannot work time, draining oil circuit 13 cannot be opened, fuel oil constantly flows into oil sprayer by oil inlet hole 11 and oil circuit 12, cause other hydraulic pressure installation fuel pressure such as normal close type piezoelectricity fuel regulator valve and oil sprayer constantly to raise, may damage system.Therefore, normal close type piezoelectricity fuel regulator valve is designed with safety protection device.The fuel pressure compression face of draining cone valve 15 is made up of compression face 18 and compression face 19.In traditional fuel regulator valve open in usual, these two compression face areas are identical, the hydraulic coupling balanced.The fuel path at draining conical surface place is designed to stepped shaft by normal close type piezoelectricity fuel regulator valve, increases the area of compression face 18, makes the area ratio of the area of itself and compression face 19 be greater than 1.2.The pressure F at compression face 18 place
18> 1.2F
19, when fuel pressure increases to a certain degree, F
18> F
19+ F
1, the pressure at compression face 18 place will make draining cone valve 15 open, and fuel oil flows back into low-pressure reservoir through draining oil circuit 13, and intrasystem fuel pressure is reduced, and protects the safety of normally close valve and other hydraulic pressure installation.
The normally closed electronically controlled unit pump of a kind of double-action piezoelectricity type of the present invention, comprises two peach cam 1, roller plunger 2, normal close type piezoelectricity fuel regulator valve 3, fuel path selector valve 4 and two outlet valve 5.The normally closed electronically controlled unit pump of double-action piezoelectricity type, installs roller plunger 2 bottom it, install normal close type piezoelectricity fuel regulator valve 3, fuel path selector valve 4 above roller plunger 2 successively, and two outlet valve 5 is installed at top.Normal close type piezoelectricity fuel regulator valve, comprises draining cone valve spring 14, draining cone valve 15, controls valve rod 16 and piezoelectric crystal 17.Piezoelectric crystal 17 is connected by controlling valve rod 16 with draining cone valve 15.When it does not power on, piezoelectric crystal 17 in the raw, and draining cone valve 15 is in normally off, and after powering on, piezoelectric crystal 17 elongation promotion control draining cone valve 15 is opened draining oil circuit 13 and completed draining.Normal close type piezoelectricity fuel regulator valve, the fuel path at its draining conical surface place is designed to stepped shaft, increases the area of compression face 18, makes it be greater than the area of compression face 19, makes the area ratio of the area of itself and compression face 19 be greater than 1.2.When fuel pressure is excessive, the stressed draining cone valve 15 of opening of difference that the different lifting surface area in two ends causes completes draining, protective system Security.Fuel path selector valve, it is equipped with solenoid valve 20, front commutation valve rod 21, selector valve 22 and rear commutation valve rod 23, and fuel path spacer block 24.When solenoid valve 20 is not energized, open left side oil circuit and close right side oil circuit, fuel oil enters an oil sprayer through outlet valve 25; Solenoid valve 20 is energized, and open right side oil circuit and close left side oil circuit, fuel oil enters an oil sprayer through outlet valve 26.The normally closed electronically controlled unit pump of double-action piezoelectricity type, its cam is two peach cams, and each peach pair roller effect angle ф 1 scope is 80 ° ~ 110 °, and between two peaches, constant speed section angle ф 2 is 100 ° ~ 70 °.Controlling selector valve by solenoid valve 20 realizes the free adjusting of fuel path and configuration, within one week, completes function to two flexible fuel feeding of oil sprayer to realize cam axle.
Claims (3)
1. the normally closed electronically controlled unit pump of double-action piezoelectricity type, is characterized in that: comprise two peach cam, roller plunger, normal close type piezoelectricity fuel regulator valve, fuel path selector valve, two outlet valve, roller plunger comprises roller, plunger, piston spring, upper plug shell, lower plunger shell, roller is arranged on the lower end of lower plunger shell, the top of plunger is positioned in upper plug shell, the bottom of plunger is positioned in lower plunger shell, piston spring is set with outside plunger, the upper end portion of piston spring withstands on upper plug shell lower end, the lower end part of piston spring is in lower plunger shell, plunger cavity is formed between the inwall of plunger and upper plug shell, upper plug shell is arranged respectively oil inlet hole, draining oil circuit and the first oil circuit, plunger cavity is communicated with oil inlet hole and the first oil circuit, normal close type piezoelectricity fuel regulator valve comprises control valve body, draining cone valve, control valve rod, piezoelectric crystal, draining cone valve spring, draining cone valve, control valve rod, piezoelectric crystal, draining cone valve spring is all arranged in control valve body, draining cone valve first end withstands on draining cone valve spring, draining cone valve second end is connected with piezoelectric crystal by controlling valve rod, the second oil circuit communicated with the first oil circuit is set in control valve body, draining cone valve spring place communicates with draining oil circuit, the tapered end face of draining cone valve second end and the cone match of control valve body inside, when piezoelectric crystal is not energized, the tapered end face of draining cone valve withstands on the conical surface of control valve body, during piezoelectric crystal energising, the tapered end face of draining cone valve leaves the conical surface of control valve body, second oil circuit is communicated with draining oil circuit, fuel path selector valve comprises electromagnetic valve body, front commutation valve rod, commutation valve body, rear commutation valve rod, fuel path spacer block, commutation valve rod before electromagnetic valve body connects, front commutation valve rod is connected with steel ball by front commutation valve rod little spring, steel ball withstands on commutation valve body, rear commutation valve rod is pressed on commutation valve body by spring, front commutation valve rod, front commutation valve rod little spring, steel ball, selector valve and rear commutation valve rod are all arranged in commutation housing, commutation housing is arranged on electromagnetic valve body, in commutation housing, the first fuel-displaced oil circuit is set, second fuel-displaced oil circuit, 3rd fuel-displaced oil circuit, first fuel-displaced oil circuit, second fuel-displaced oil circuit all communicates with the 3rd fuel-displaced oil circuit, in 3rd fuel-displaced oil circuit, fuel path spacer block is set, second oil circuit stretches in commutation housing, commutation valve body realizes communicating of the second oil circuit and the first fuel-displaced oil circuit or the second fuel-displaced oil circuit under the control of electromagnetic valve body, two outlet valve comprises the first outlet valve and the second outlet valve, and the first outlet valve is communicated with the first fuel-displaced oil circuit, and the second outlet valve is communicated with the second fuel-displaced oil circuit, two peach cam matches with roller.
2. the normally closed electronically controlled unit pump of double-action piezoelectricity type according to claim 1, it is characterized in that: control valve rod and mutually intersect with the second oil circuit, the part controlling valve rod intersects with the second oil circuit arranges the first compression face and the second compression face respectively, first compression face and the second compression face lay respectively at draining cone valve side and the piezoelectric crystal side of the second oil circuit, and the area of the first compression face is not less than 1.2 times of the second compression face area.
3. the normally closed electronically controlled unit pump of double-action piezoelectricity type according to claim 1 and 2, is characterized in that: each peach pair roller effect angular range of two peach cam is 80 ° ~ 110 °, and between two peaches, constant speed section angle is 100 ° ~ 70 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510212764.1A CN104806404B (en) | 2015-04-30 | 2015-04-30 | The normally closed electronically controlled unit pump of double acting piezoelectric type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510212764.1A CN104806404B (en) | 2015-04-30 | 2015-04-30 | The normally closed electronically controlled unit pump of double acting piezoelectric type |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104806404A true CN104806404A (en) | 2015-07-29 |
| CN104806404B CN104806404B (en) | 2017-12-12 |
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ID=53691538
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510212764.1A Expired - Fee Related CN104806404B (en) | 2015-04-30 | 2015-04-30 | The normally closed electronically controlled unit pump of double acting piezoelectric type |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5979410A (en) * | 1997-09-03 | 1999-11-09 | Robert Bosch Gmbh | Fuel injection system for an internal combustion engine |
| US6454239B1 (en) * | 1999-09-30 | 2002-09-24 | Robert Bosch Gmbh | Valve for controlling liquids |
| DE10348927A1 (en) * | 2003-10-18 | 2005-05-12 | Bosch Gmbh Robert | Fuel injection valve for diesel engine with common-rail fuel injection system e.g for automobile, using piezoelectric actuator unit for stepped operation of 2 valve closures |
| CN1773096A (en) * | 2005-09-15 | 2006-05-17 | 中国农业大学 | Non-electric controlling diesel engine fuel injecting method and fuel injector thereof |
| CN101871411A (en) * | 2010-06-11 | 2010-10-27 | 哈尔滨工程大学 | Modularized electric unit pump |
| CN102422020A (en) * | 2009-05-13 | 2012-04-18 | 罗伯特·博世有限公司 | Valve unit for high-pressure piston fuel pump and pump comprising same |
| CN103244329A (en) * | 2013-04-28 | 2013-08-14 | 哈尔滨工程大学 | High-pressure common-rail fuel system with electric monoblock pumps |
| CN204677343U (en) * | 2015-04-30 | 2015-09-30 | 哈尔滨工程大学 | The normally closed electronically controlled unit pump of double-action piezoelectricity type |
-
2015
- 2015-04-30 CN CN201510212764.1A patent/CN104806404B/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5979410A (en) * | 1997-09-03 | 1999-11-09 | Robert Bosch Gmbh | Fuel injection system for an internal combustion engine |
| US6454239B1 (en) * | 1999-09-30 | 2002-09-24 | Robert Bosch Gmbh | Valve for controlling liquids |
| DE10348927A1 (en) * | 2003-10-18 | 2005-05-12 | Bosch Gmbh Robert | Fuel injection valve for diesel engine with common-rail fuel injection system e.g for automobile, using piezoelectric actuator unit for stepped operation of 2 valve closures |
| CN1773096A (en) * | 2005-09-15 | 2006-05-17 | 中国农业大学 | Non-electric controlling diesel engine fuel injecting method and fuel injector thereof |
| CN102422020A (en) * | 2009-05-13 | 2012-04-18 | 罗伯特·博世有限公司 | Valve unit for high-pressure piston fuel pump and pump comprising same |
| CN101871411A (en) * | 2010-06-11 | 2010-10-27 | 哈尔滨工程大学 | Modularized electric unit pump |
| CN103244329A (en) * | 2013-04-28 | 2013-08-14 | 哈尔滨工程大学 | High-pressure common-rail fuel system with electric monoblock pumps |
| CN204677343U (en) * | 2015-04-30 | 2015-09-30 | 哈尔滨工程大学 | The normally closed electronically controlled unit pump of double-action piezoelectricity type |
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| Publication number | Publication date |
|---|---|
| CN104806404B (en) | 2017-12-12 |
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