CN104806408A - Multi-mode normally closed electronic control unit pump - Google Patents
Multi-mode normally closed electronic control unit pump Download PDFInfo
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- CN104806408A CN104806408A CN201510212676.1A CN201510212676A CN104806408A CN 104806408 A CN104806408 A CN 104806408A CN 201510212676 A CN201510212676 A CN 201510212676A CN 104806408 A CN104806408 A CN 104806408A
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- 239000013078 crystal Substances 0.000 claims abstract description 32
- 239000000446 fuel Substances 0.000 claims description 110
- 235000006040 Prunus persica var persica Nutrition 0.000 claims description 25
- 230000006835 compression Effects 0.000 claims description 25
- 238000007906 compression Methods 0.000 claims description 25
- 244000144730 Amygdalus persica Species 0.000 claims description 21
- 125000006850 spacer group Chemical group 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 8
- 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 101
- 239000000295 fuel oil Substances 0.000 abstract description 31
- 230000009931 harmful effect Effects 0.000 abstract description 2
- 238000005192 partition Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000001473 noxious effect Effects 0.000 description 4
- 230000001681 protective effect Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000002153 concerted effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The invention aims to provide a multi-mode normally closed electronic control unit pump. The pump comprises a double-jumper cam, a roller plunger, a normally closed fuel oil control valve, a fuel oil path reverse valve and double oil outlet valves, wherein the normally closed fuel oil control valve is arranged on the upper side of the plunger and comprises an electromagnetic valve, an electromagnetic valve rod, an electromagnetic valve spring, an oil drainage conical valve connecting sleeve, an oil drainage conical valve and an oil drainage conical valve spring; the fuel oil path reverse valve is arranged on the upper side of the normally closed fuel oil control valve and comprises a piezoelectric crystal, a front reverse valve rod, a reverse valve, a rear reverse valve rod and a fuel oil path partition block. The working efficiency of the electronic control unit pump can be effectively improved, the engine efficiency is improved, the requirements on oil supply frequency, oil supply pressure and oil supply quantity under different working conditions and different loads of an engine are met, the engine economy and dynamic property are improved, and harmful emission is effectively reduced.
Description
Technical field
What the present invention relates to is a kind of fueling injection equipment, specifically the volume fueling injection equipment of motor.
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.The features such as the development of piezo technology makes engine electronic control technology enter new height, and the response of piezoelectric crystal is quick, and controllability flexibly and power consumption is few, for further developing of engine electronic control technology provides technical support.
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, two kinds of working staties are only opened and closed to high-speed switch electromagnetic valve, cannot complete multi-mode and control; Its two, solenoid valve speed of response is limited, and working stability is not high; Its three, monoblock pump inefficiency, camshaft rotates a circle the oil supply function that can only complete an oil sprayer; Its four, 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 five, 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 six, 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 seven, 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, effectively can reduce the normally closed electronically controlled unit pump of multi-mode of noxious emission simultaneously.
The object of the present invention is achieved like this:
The normally closed electronically controlled unit pump of multi-mode of the present invention, is characterized in that: comprise two peach cam, roller plunger, normal close type 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 fuel regulator valve comprises control valve body, first electromagnetic valve body, solenoid valve valve rod, draining cone valve, draining cone valve valve rod, control valve body and the first electromagnetic valve body are arranged in juxtaposition, draining cone valve, draining cone valve valve rod is arranged in control valve body, first electromagnetic valve body connects the first end of draining cone valve by solenoid valve valve rod, second end of draining cone valve is tapered end face, tapered end face coordinates with the control valve body on its side, draining cone valve valve rod first end connects the second end of draining cone valve, second end of draining cone valve valve rod withstands on draining cone valve spring, draining cone valve spring top is on the control valve body that it is other, solenoid valve valve rod is provided with solenoid valve spring, solenoid valve spring place is communicated with draining oil circuit, the second oil circuit communicated with the first oil circuit is set in control valve body, draining cone valve valve rod intersects mutually with the second oil circuit, fuel path selector valve comprises piezoelectric crystal, front commutation valve rod, commutation valve body, rear commutation valve rod, fuel path spacer block, commutation housing and piezoelectric crystal are arranged in juxtaposition, commutation valve rod before piezoelectric crystal 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, 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 under the control of piezoelectric crystal, realize communicating of the second oil circuit and the first fuel-displaced oil circuit or the second fuel-displaced oil circuit and the second oil circuit communicates with the first fuel-displaced oil circuit and the second fuel-displaced oil circuit simultaneously, 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:
The part of 1, draining cone valve valve rod intersecting 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 draining cone valve spring 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 multi-mode 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, also can realize the function of fuel feeding or two oil sprayers fuel feeding simultaneously in varing proportions simultaneously of two oil sprayers under different operating mode simultaneously.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, piezoelectric crystal controls the speed of response that fuel path selector valve can improve 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 and fuel delivery needs.Simultaneously due to fast response time that piezoelectric crystal has, the advantages such as controllability is flexible, the combination that fuel path selector valve can realize two outlet valve controls, by changing piezoelectric crystal control signal, outlet valve 27 outlet valve 28 that works can be realized do not work, outlet valve 28 outlet valve 27 that works does not work, and the multi-mode working mode that the flow of two outlet valve different proportions works simultaneously, thus improves the flexibility of monoblock pump.
This device also has following beneficial effect simultaneously: this device is when fuel regulator valve solenoid valve normally works, effectively can control fuel oil by the circulating rate of fuel regulator valve and currency, simultaneously by the control mode that fuel regulator valve solenoid valve 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 repeatedly fuel supply rate curve by changing fuel regulator valve control signal, improving motor Economy, power character, effectively reducing noxious emission.This device fuel regulator valve is normal-closed electromagnetic valve, when its solenoid valve 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 solenoid valve break down can not power on time; or the hydraulic pressure installation such as oil sprayer connecting monoblock pump is when breaking down, draining cone valve is in normally off and normally closed solenoid valve internal pressure can be caused constantly to raise, but under the effect of protective measure; draining cone valve can open draining oil circuit; make 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 overall structure schematic diagram of the present invention;
Fig. 2 is roller piston structure schematic diagram of the present invention;
Fig. 3 a is normal close type 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, Fig. 4 b is one of fuel path selector valve multi-mode schematic diagram, Fig. 4 c is fuel path selector valve multi-mode schematic diagram two, Fig. 4 d is fuel path selector valve multi-mode schematic diagram three, Fig. 4 e is fuel path selector valve multi-mode schematic diagram four;
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, normal close type fuel regulator valve 3, fuel path selector valve 4 and two outlet valve 5 and forms.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 fuel regulator valve 3, comprises solenoid valve 14, solenoid valve valve rod 15, solenoid valve spring 16, draining cone valve coupling sleeve 17, draining cone valve 18 and draining cone valve spring 19.Fuel path selector valve 4 is arranged on above normal close type fuel regulator valve 3, and it comprises piezoelectric crystal 22, front commutation valve rod 23, selector valve 24 and rear commutation valve rod 25, and fuel path spacer block 26.Two outlet valve 5 is arranged on the pump housing 6 top, is made up of outlet valve 27 and outlet valve 28.
The normally closed electronically controlled unit pump of multi-mode of the present invention is made up of two peach cam 1, roller plunger 2, normal close type 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, and after closing oil inlet hole 11, the fuel oil in compression plunger chamber 10, completes fuel oil pressurization function, and the fuel oil after compression flows into normal close type fuel regulator valve through oil circuit 12.
Normal close type fuel regulator valve 3 comprises solenoid valve 14, solenoid valve valve rod 15, solenoid valve spring 16, draining cone valve coupling sleeve 17, draining cone valve 18 and draining cone valve spring 19.Solenoid valve 14 is connected with draining cone valve coupling sleeve 17 interference fit by solenoid valve valve rod 15 with draining cone valve 18.When normal close type fuel regulator valve does not power on, draining cone valve 18 is subject to making a concerted effort of solenoid valve spring 16, draining cone valve spring 19 and fuel pressure P, solenoid valve spring 16 and draining cone valve spring 19 are all in compressive state, because solenoid valve spring 16 pretightening force F1 is greater than draining cone valve spring 19 pretightening force F2, i.e. F
1> F
2, so draining cone valve 18 is landed on the conical surface, the draining oil circuit of valve is in normally off, and in plunger cavity 10, fuel oil after compression flows into oil sprayer by oil circuit 12 through fuel path selector valve 4.When solenoid valve 14 powers on, draining cone valve 18 be subject to solenoid valve 14 produce electromagnetic force F3, solenoid valve spring 16 spring force F1, draining cone valve spring 19 spring force F2 and fuel pressure P make a concerted effort, now electromagnetic force F3 and draining initial tension of spring F2 make a concerted effort be greater than solenoid valve initial tension of spring F1, i.e. F
3+ F
2> F
1, solenoid valve valve rod 15 pairs of draining cone valve coupling sleeves 17 produce active force, and drive draining cone valve 18 to open draining oil circuit 13, fuel oil flows back to low-pressure reservoir.By the control to normal close type fuel regulator valve solenoid valve signal, repeatedly fuel feeding can be realized.
Fuel path selector valve 4 comprises piezoelectric crystal 22, front commutation valve rod 23, selector valve 24 and rear commutation valve rod 25, and fuel path spacer block 26.Front commutation valve rod 23 is controlled by piezoelectric crystal 22, 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 24, and the valve rod 25 that commutates after the other end is connected with selector valve 24.Selector valve 24 upper end withstands on fuel path spacer block 26.When not receiving control signal, in the raw, selector valve 24 right-hand member contacts with fuel path spacer block 26 left end piezoelectric crystal 22, opens right side oil circuit and closes left side oil circuit, as shown in Fig. 4 (a), now fuel oil enters an oil sprayer through outlet valve 28; When piezoelectric crystal 22 receives maximum control signal, piezoelectric crystal produces inverse piezoelectric activity and extends, selector valve 24 left end contacts with the right-hand member of fuel path spacer block 26, open left side oil circuit and close right side oil circuit, as shown in Fig. 4 (b), now fuel oil enters an oil sprayer through outlet valve 27; When the control signal that piezoelectric crystal 22 receives is between minimum and maximum, piezoelectric crystal extends by a certain percentage, the ratio that now selector valve 24 extends according to piezoelectric crystal opens both sides oil circuit simultaneously, as shown in Fig. 4 (c), different control signal size, the flow of both sides oil circuit is different; Such as when piezoelectric crystal 22 receives a half of maximum control signal, Contact in selector valve 24 middle position and fuel path spacer block 26, left and right sides oil circuit is opened simultaneously, and as shown in Fig. 4 (d), fuel oil enters two oil sprayers through two outlet valves with identical flow simultaneously.Therefore, fuel path selector valve can realize multiple different mode of operation fuel oil configuration supply.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 fuel regulator valve 3 is when the situation solenoid valves 14 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 solenoid valve 14 of normal close type 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 fuel regulator valve and oil sprayer constantly to raise, may damage system.Therefore, normal close type fuel regulator valve is designed with safety protection device.The fuel pressure compression face of draining cone valve 18 is made up of compression face 20 and compression face 21.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 fuel regulator valve, increases the area of compression face 20, makes the area ratio of the area of itself and compression face 21 be greater than 1.2.The pressure F at compression face 20 place
20> 1.2F
21, when fuel pressure increases to a certain degree, F
20+ F
2> F
21+ F
1, the pressure at compression face 20 place will make draining cone valve 18 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.
Normal close type fuel regulator valve is normally off when not powering on, and after powering on, draining oil circuit opened by draining cone valve.Normal close type fuel regulator valve can solve the supply problem of fuel oil in the situations such as motor power down.By the transformation to draining cone valve place fuel path, oil circuit is designed to ladder-type, changes the area of fuel pressure suffered by valve two ends, when solenoid valve breaks down, too high fuel pressure can push draining cone valve open, completes draining pressure relief.Improve stability and the Security of valve itself with protective gear normal close type fuel regulator valve, and then improve the reliability of the hydraulic pressure installation such as electronically controlled unit pump and oil sprayer, improve the stability that motor runs.Fuel path selector valve controls fuel oil and flows to, fuel path can be switched fast, the multi-mode working of multiple oil circuit configuration can be realized by controlling fuel path selector valve fast, and then realize the function that two outlet valves replace fuel feeding or two outlet valves fuel feeding simultaneously in varing proportions.By the cooperation of fuel oil Controlling solenoid valve and fuel path selector valve, the size and the form that change piezoelectric crystal signal magnitude and fuel oil Controlling solenoid valve electromagnetic force can realize different fuel feeding moment and supply time.Utilizing the two peach cams designed by the present invention can realize cam angle rotates a circle to the function of two flexible fuel feeding of oil sprayer, effectively can improve the working efficiency of electronically controlled unit pump, improve engine efficiency, meet the fuel feeding number of times of motor under different operating mode, different load, charge oil pressure and fuel delivery needs, improve motor Economy, power character, effectively reduce noxious emission.
The normally closed electronically controlled unit pump of a kind of multi-mode of the present invention, comprises two peach cam 1, roller plunger 2, normal close type fuel regulator valve 3, fuel path selector valve 4 and two outlet valve 5.The normally closed electronically controlled unit pump of multi-mode, installs roller plunger 2 bottom it, install normal close type fuel regulator valve 3, fuel path selector valve 4 above roller plunger 2 successively, and two outlet valve 5 is installed at the pump housing 1 top.Promote plunger by two peach cam 1 and carry out force feed.Described normal close type fuel regulator valve, comprises solenoid valve 14, solenoid valve valve rod 15, solenoid valve spring 16, draining cone valve coupling sleeve 17, draining cone valve 18 and draining cone valve spring 19.Solenoid valve 14 is connected with draining cone valve coupling sleeve 17 interference fit by solenoid valve valve rod 15 with draining cone valve 18.Be in normally off when it does not power on, open draining oil circuit 13 by control draining cone valve 18 after powering on and complete draining.Described normal close type fuel regulator valve, the fuel path at its draining conical surface place is designed to stepped shaft, increases the area of compression face 20, makes the area ratio of the area of itself and compression face 21 be greater than 1.2.When fuel pressure is excessive, the stressed draining cone valve of opening of difference that the different lifting surface area in two ends causes completes draining, protective system Security.Described fuel path selector valve, it is equipped with piezoelectric crystal 22, front commutation valve rod 23, selector valve 24 and rear commutation valve rod 25, and fuel path spacer block 26.When not receiving control signal, in the raw, selector valve 24 right-hand member contacts with fuel path spacer block 26 left end piezoelectric crystal 22, and open right side oil circuit and close left side oil circuit, now fuel oil enters an oil sprayer through outlet valve 28; When piezoelectric crystal 22 receives maximum control signal, piezoelectric crystal produces inverse piezoelectric activity and extends, and selector valve 24 left end contacts with the right-hand member of fuel path spacer block 26, and open left side oil circuit and close right side oil circuit, now fuel oil enters an oil sprayer through outlet valve 27; When the control signal that piezoelectric crystal 22 receives is between minimum and maximum, piezoelectric crystal extends by a certain percentage, the ratio that now selector valve 24 extends according to piezoelectric crystal opens both sides oil circuit simultaneously, different control signal size, and the flow of both sides oil circuit is different.The multi-mode flexible configuration of several working ways can be realized.The normally closed electronically controlled unit pump of described multi-mode, 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 piezoelectric crystal 22 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 multi-mode, is characterized in that: comprise two peach cam, roller plunger, normal close type 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 fuel regulator valve comprises control valve body, first electromagnetic valve body, solenoid valve valve rod, draining cone valve, draining cone valve valve rod, control valve body and the first electromagnetic valve body are arranged in juxtaposition, draining cone valve, draining cone valve valve rod is arranged in control valve body, first electromagnetic valve body connects the first end of draining cone valve by solenoid valve valve rod, second end of draining cone valve is tapered end face, tapered end face coordinates with the control valve body on its side, draining cone valve valve rod first end connects the second end of draining cone valve, second end of draining cone valve valve rod withstands on draining cone valve spring, draining cone valve spring top is on the control valve body that it is other, solenoid valve valve rod is provided with solenoid valve spring, solenoid valve spring place is communicated with draining oil circuit, the second oil circuit communicated with the first oil circuit is set in control valve body, draining cone valve valve rod intersects mutually with the second oil circuit, fuel path selector valve comprises piezoelectric crystal, front commutation valve rod, commutation valve body, rear commutation valve rod, fuel path spacer block, commutation housing and piezoelectric crystal are arranged in juxtaposition, commutation valve rod before piezoelectric crystal 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, 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 under the control of piezoelectric crystal, realize communicating of the second oil circuit and the first fuel-displaced oil circuit or the second fuel-displaced oil circuit and the second oil circuit communicates with the first fuel-displaced oil circuit and the second fuel-displaced oil circuit simultaneously, 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 multi-mode according to claim 1, it is characterized in that: the part that draining cone valve 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 draining cone valve spring 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 multi-mode 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 |
|---|---|---|---|
| CN201510212676.1A CN104806408B (en) | 2015-04-30 | 2015-04-30 | Multi-mode normally closed electronic control unit pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510212676.1A CN104806408B (en) | 2015-04-30 | 2015-04-30 | Multi-mode normally closed electronic control unit pump |
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| CN104806408A true CN104806408A (en) | 2015-07-29 |
| CN104806408B CN104806408B (en) | 2017-05-24 |
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|---|---|---|---|
| CN201510212676.1A Expired - Fee Related CN104806408B (en) | 2015-04-30 | 2015-04-30 | Multi-mode normally closed electronic control unit pump |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105351129A (en) * | 2015-11-25 | 2016-02-24 | 哈尔滨工程大学 | Normally-closed type heavy-oil single-valve electronic unit pump |
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| CN204677348U (en) * | 2015-04-30 | 2015-09-30 | 哈尔滨工程大学 | The normally closed electronically controlled unit pump of multi-mode |
-
2015
- 2015-04-30 CN CN201510212676.1A patent/CN104806408B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5209199A (en) * | 1991-10-10 | 1993-05-11 | Robert Bosch Gmbh | Control apparatus for turning off an internal combustion engine |
| US5979410A (en) * | 1997-09-03 | 1999-11-09 | Robert Bosch Gmbh | Fuel injection system for an internal combustion engine |
| 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 |
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| CN105351129A (en) * | 2015-11-25 | 2016-02-24 | 哈尔滨工程大学 | Normally-closed type heavy-oil single-valve electronic unit pump |
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| CN104806408B (en) | 2017-05-24 |
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