CN104806408B - Multi-mode normally closed electronic control unit pump - Google Patents
Multi-mode normally closed electronic control unit pump Download PDFInfo
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- CN104806408B CN104806408B CN201510212676.1A CN201510212676A CN104806408B CN 104806408 B CN104806408 B CN 104806408B CN 201510212676 A CN201510212676 A CN 201510212676A CN 104806408 B CN104806408 B CN 104806408B
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- 244000144730 Amygdalus persica Species 0.000 claims description 21
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- 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
- 238000002485 combustion reaction Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract description 79
- 239000000295 fuel oil Substances 0.000 abstract description 37
- 238000005192 partition Methods 0.000 abstract 1
- 230000005611 electricity Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 238000002347 injection Methods 0.000 description 7
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- 238000004891 communication Methods 0.000 description 2
- 230000001473 noxious effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 239000002828 fuel tank Substances 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
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
The present invention relates to a kind of fueling injection equipment, specifically the volume fueling injection equipment of engine.
Background technology
With the progress of human society, the development of Modern Engine is had in face of energy crisis and environmental pollution band
The dual-pressure come, engine emission standard is improved constantly, and this causes that development of engine must be towards the direction of energy-saving and emission-reduction.And
Realize having become the control of engine fuel injection system the developing trend of engine, electronically controlled unit pump using Electronic Control
Technology is a kind of important technical.Electronically controlled unit pump is a kind of time control for meeting engine emission regulation and cost-effectiveness requirement
Standard fuel injection system, with injection pressure it is high, injection timing is flexible adjustable the features such as.The development of piezo technology causes to start
Electrical Control technology enters new height, the response quickly of piezo-electric crystal, is engine the features such as controllability is flexibly and power consumption is few
The further development of electronic control technology provides technical support.
Traditional electronically controlled unit pump is using common normal-open electromagnetic valve control fuel oil draining oil circuit, and common normal-open electromagnetic valve
When not going up electricity, 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.Work as magnetic valve
After upper electricity, draining oil circuit is closed by electromagnetic force, the fuel oil after plunger pressurization flow to fuel injector through normally open valve.But it is traditional
Electronically controlled unit pump exists following not enough：First, high-speed switch electromagnetic valve only has two kinds of working conditions of on and off, it is impossible to complete multimode
Formula is controlled；Second, magnetic valve response speed is limited, and job stability is not high；Third, monoblock pump inefficiency, camshaft
Rotate a circle and can be only done to an oil supply function for fuel injector；If convex fourth, simple change cam profile is double peach cams
Wheel shaft rotates a circle the distributive value of the more than one fuel injector of supplied fuel oil, and will cause the efficiency of engine fuel oil system reduces；Its
Five, traditional electronically controlled unit pump can be only done the control function to single control valve, it is difficult to meet engine in different working conditions
Under requirement to fuel injection processes；Sixth, when solenoid valve failure cannot go up electricity, draining oil circuit will all the time be in open shape
State, normally open valve can not will complete to control the function of fuel flow communication；If seventh, magnetic valve is stuck in the closed state, oil pressure in valve
Can constantly raise, normally open valve and fuel injector are had undesirable effect, cause other hydraulic means such as fuel injector to be destroyed.In a word
Traditional electronically controlled unit pump operating efficiency is relatively low, and security is poor, it is impossible to meet engine job stability, do not possess to failure and
When the ability reacted.
The content of the invention
It is an object of the invention to provide being used to improve engine economy, dynamic property, stability and reliability, while energy
Enough normally closed electronically controlled unit pumps of multi-mode for effectively reducing noxious emission.
The object of the present invention is achieved like this：
The normally closed electronically controlled unit pump of multi-mode of the present invention, it is characterized in that：Including double peach cams, roller plunger, closed type fuel oil
Control valve, fuel path reversal valve, double delivery valves；Roller plunger includes roller, plunger, plunger spring, upper plug shell, lower plunger
Shell, roller is arranged on the lower end of lower plunger shell, and the top of plunger is located in upper plug shell, and the bottom of plunger is located at lower plunger shell
In, plunger outside is set with plunger spring, and the upper end of plunger spring withstands on upper plug shell lower end, the lower end part of plunger spring
In plunger cavity in lower plunger shell, is formed between the inwall of plunger and upper plug shell, fuel feed hole, draining are respectively provided with upper plug shell
Oil circuit and the first oil circuit, plunger cavity connection fuel feed hole and the first oil circuit；Closed type fuel regulator valve includes application valve body, first
Electromagnetic valve body, magnetic valve valve rod, draining cone valve, draining cone valve valve rod, application valve body and the first electromagnetic valve body are arranged in juxtaposition, draining
Cone valve, draining cone valve valve rod are arranged in application valve body, and the first electromagnetic valve body connects draining cone valve by magnetic valve valve rod
First end, the second end of draining cone valve is tapered end face, and tapered end face coordinates with its other application valve body, draining cone valve valve rod the
One end connects the second end of draining cone valve, and the second end of draining cone valve valve rod is withstood in draining cone valve spring, draining cone valve spring
Withstand on its other application valve body, magnetic valve spring is installed on magnetic valve valve rod, draining oil circuit, control are connected at magnetic valve spring
The second oil circuit that setting is communicated with the first oil circuit in valve body processed, draining cone valve valve rod intersects with the second oil circuit；Fuel path
Reversal valve includes piezo-electric crystal, preceding commutation valve rod, afterwards commutation valve body, commutation valve rod, fuel path spacer block, and commutate housing and piezoelectricity
Crystal is arranged in juxtaposition, and commutation valve rod before piezo-electric crystal connection, preceding commutation valve rod is connected by preceding commutation valve rod little spring with steel ball,
Steel ball is withstood on commutation valve body, and the valve rod that commutates afterwards is pressed on commutation valve body by spring, preceding commutation valve rod, the preceding small bullet of commutation valve rod
Spring, steel ball, reversal valve and rear commutation valve rod are arranged in commutation housing, and the first fuel-displaced oil circuit, the are set in commutation housing
Two fuel-displaced oil circuits, the 3rd fuel-displaced oil circuit, the first fuel-displaced oil circuit, the second fuel-displaced oil circuit are communicated with the 3rd fuel-displaced oil circuit, and the 3rd goes out
Fuel path spacer block is set in oil circuit, and the second oil circuit is stretched in commutation housing, and commutation valve body is under the control of piezo-electric crystal
Realize communicating and the second oil circuit and the first fuel-displaced oil circuit and for the second oil circuit and the first fuel-displaced oil circuit or the second fuel-displaced oil circuit
Two fuel-displaced oil circuits are communicated simultaneously；Double delivery valves include the first delivery valve and the second delivery valve, and the connection first of the first delivery valve is fuel-displaced
Oil circuit, the second delivery valve connects the second fuel-displaced oil circuit；Double peach cams are engaged with roller.
The present invention can also include：
1st, the part intersected with the second oil circuit on draining cone valve valve rod is respectively provided with the first compression face and the second compression face, the
, respectively positioned at the draining cone valve side and draining cone valve spring side of the second oil circuit, first receives for one compression face and the second compression face
1.2 times of the area of pressure surface not less than the second compression face area.
2nd, each peach pair roller angle scope of double peach cams is 80 °~110 °, constant speed section angle between two peaches
It is 100 °~70 °.
Advantage of the invention is that：Multi-mode electronically controlled unit pump in the present apparatus can be realized flexibly supplying two fuel injectors
The function of oil, can coordinate double peach cams to complete to replace two fuel injectors the function of fuel feeding when camshaft rotates a circle, while
Also two fuel injectors are while fuel feeding or two fuel injectors are in varing proportions while the function of fuel feeding under different operating modes can be realized.Can be effective
Raising electronically controlled unit pump operating efficiency, improve engine efficiency, improve engine economy, dynamic property, can effectively drop
Low noxious emission.Fuel path reversal valve in the present apparatus, can realize the cooperation control to double delivery valve oil circuits, piezo-electric crystal
Control fuel path reversal valve can improve the response speed of reversal valve, can flexibly control fuel injector fuel feeding moment and fuel delivery, full
Fuel feeding number of times of the sufficient engine under different operating modes, different load, charge oil pressure and fuel delivery need.Simultaneously because piezo-electric crystal
The fast response time being had, the advantages of controllability is flexible, fuel path reversal valve can realize the combination control of double delivery valves, lead to
Cross change piezo-electric crystal control signal, it is possible to achieve the work delivery valve 28 of delivery valve 27 does not work, the work delivery valve of delivery valve 28
27 do not work, and two delivery valve different proportions flow simultaneously work multi-mode working mode, so as to improve monoblock pump
Flexibility.
The present apparatus also has following beneficial effect simultaneously：The present apparatus, can be effective in fuel regulator valve magnetic valve normal work
Control fuel oil by the circulating rate of fuel regulator valve and currency, while by the different control of fuel regulator valve magnetic valve
Mode processed can realize the flexible control at fuel flow communication amount and circulation moment.Can make spray by changing fuel regulator valve control signal
Oil system meets the demand of the multiple fuel supply rate curve of engine multi-state, improves engine economy, dynamic property, effectively reduces harmful
Discharge.Present apparatus fuel regulator valve is normal-closed electromagnetic valve, and when its magnetic valve breaks down can not go up electricity, draining cone valve is in
Normally off, remains able to continue to complete the function of fuel feeding, the adaptability to changes of engine when improving engine power down
And job stability.Meanwhile, present apparatus fuel regulator valve is designed with safeguard measure, when magnetic valve breaks down can not go up electricity,
Or the hydraulic means such as fuel injector of connection monoblock pump, when breaking down, draining cone valve can cause normally closed solenoid valve in normally off
Interior pressure is constantly raised, but in the presence of safeguard measure, draining cone valve can open draining oil circuit, fuel oil is flowed back to low pressure oil
Case, reduces the fuel pressure in whole system, protects the safety of fuel system.
Brief description of the drawings
Fig. 1 is overall structure diagram of the invention；
Fig. 2 is roller piston structure schematic diagram of the invention；
Fig. 3 a are closed type fuel regulator valve structural representation of the invention, and Fig. 3 b are the partial schematic diagram of Fig. 3 a；
Fig. 4 a are fuel path structure of reversing valve schematic diagram of the invention, and Fig. 4 b illustrate for fuel path reversal valve multi-mode
One of figure, Fig. 4 c are fuel path reversal valve multi-mode schematic diagram for two, Fig. 4 d of fuel path reversal valve multi-mode schematic diagram
Three, Fig. 4 e for fuel path reversal valve multi-mode schematic diagram four；
Fig. 5 is of the invention pair of delivery valve structure schematic diagram；
Fig. 6 is of the invention pair of peach cam structure schematic diagram.
Specific embodiment
Illustrate below in conjunction with the accompanying drawings and the present invention is described in more detail：
With reference to Fig. 1~6, the present apparatus includes that double peach cams 1, roller plunger 2, closed type fuel regulator valve 3, fuel path are changed
Constituted to valve 4 and double delivery valves 5.Roller plunger 2 is arranged on the bottom of the pump housing 6, by roller 7, plunger 8, plunger spring 9, plunger cavity
10th, fuel feed hole 11, oil circuit 12 and draining oil circuit 13 are constituted.The top of plunger cavity 10 is provided with closed type fuel regulator valve 3, including
Magnetic valve 14, magnetic valve valve rod 15, magnetic valve spring 16, draining cone valve branch sleeve 17, draining cone valve 18 and draining cone valve bullet
Spring 19.Fuel path reversal valve 4 is arranged on the top of closed type fuel regulator valve 3, and it includes piezo-electric crystal 22, preceding commutation valve rod
23rd, reversal valve 24 and rear commutation valve rod 25, and fuel path spacer block 26.Double delivery valves 5 are arranged on the top of the pump housing 6, by fuel-displaced
Valve 27 and delivery valve 28 are constituted.
The normally closed electronically controlled unit pump of multi-mode of the invention by double peach cams 1, roller plunger 2, closed type fuel regulator valve 3,
Fuel path reversal valve 4 and double delivery valves 5 are constituted.Roller plunger 2 is by roller 7, plunger 8, plunger spring 9, plunger cavity 10, oil-feed
Hole 11, oil circuit 12 and draining oil circuit 13 are constituted.When plunger 8 is descending, fuel oil is sucked from fuel feed hole 11, double peach cams 1 promote rolling
Wheel 7 makes plunger 8 up, and after closing fuel feed hole 11, the fuel oil in compression plunger chamber 10 completes fuel oil pressurization function, after compression
Fuel oil flows into closed type fuel regulator valve through oil circuit 12.
Closed type fuel regulator valve 3 includes magnetic valve 14, magnetic valve valve rod 15, magnetic valve spring 16, the connection of draining cone valve
Sleeve 17, draining cone valve 18 and draining cone valve spring 19.Magnetic valve 14 passes through magnetic valve valve rod 15 and draining with draining cone valve 18
The interference fit of cone valve branch sleeve 17 is connected.When closed type fuel regulator valve does not go up electricity, draining cone valve 18 is subject to magnetic valve spring
16th, draining cone valve spring 19 and fuel pressure P make a concerted effort, and magnetic valve spring 16 and draining cone valve spring 19 be in compressing shape
State, because the pretightning force F1 of magnetic valve spring 16 is more than draining cone valve spring 19 pretightning force F2, i.e. F1＞ F2, so draining cone valve 18
It is landed on the conical surface, the draining oil circuit of valve is in normally off, and the fuel oil in plunger cavity 10 after compression is by oil circuit 12 by firing
Oil circuit reversal valve 4 flows into fuel injector.When electricity on magnetic valve 14, draining cone valve 18 is subject to the electromagnetic force that magnetic valve 14 is produced
F3, the spring force F1 of magnetic valve spring 16, the spring force F2 of draining cone valve spring 19 and fuel pressure P make a concerted effort, now electromagnetic force F3
With making a concerted effort more than magnetic valve spring pretightning force F1, i.e. F for draining initial tension of spring F23+F2＞ F1, magnetic valve valve rod 15 is to draining
Cone valve branch sleeve 17 acts power, drives draining cone valve 18 to open draining oil circuit 13, and fuel oil flows back to low-pressure reservoir.By right
The control of closed type fuel regulator valve solenoid signal, is capable of achieving multiple fuel feeding.
Fuel path reversal valve 4 includes piezo-electric crystal 22, preceding commutation valve rod 23, reversal valve 24 and rear commutation valve rod 25, with
And fuel path spacer block 26.It is preceding commutation valve rod 23 controlled by piezo-electric crystal 22, valve rod front end by it is preceding commutation valve rod little spring with
One small ball is connected, and small ball is withstood on reversal valve 24, and the valve rod 25 that commutated after the other end is connected with reversal valve 24.On reversal valve 24
End is withstood on fuel path spacer block 26.When not receiving control signal, piezo-electric crystal 22 in the raw, the right-hand member of reversal valve 24
Contacted with the left end of fuel path spacer block 26, open right side oil circuit and close left side oil circuit, shown in such as Fig. 4 (a), now fuel oil is through going out
Fuel tap 28 enters a fuel injector；When piezo-electric crystal 22 receives maximum control signal, piezo-electric crystal produces inverse piezoelectric activity to stretch
Long, the left end of reversal valve 24 is contacted with the right-hand member of fuel path spacer block 26, is opened left side oil circuit and is closed right side oil circuit, such as Fig. 4 (b)
Shown, now fuel oil enters a fuel injector through delivery valve 27；The control signal received when piezo-electric crystal 22 is between maximum and most
When between small, piezo-electric crystal extends by a certain percentage, and the ratio that now reversal valve 24 extends according to piezo-electric crystal opens two simultaneously
Shown in side oil circuit, such as Fig. 4 (c), different control signal sizes, the flow of both sides oil circuit is different；For example when piezo-electric crystal 22 is received
To maximum control signal half when, contacted in the middle of the middle position of reversal valve 24 and fuel path spacer block 26, left and right sides oil circuit
Open simultaneously, shown in such as Fig. 4 (d), fuel oil enters two fuel injectors simultaneously through two delivery valves with identical flow.Therefore, fuel oil
Oil circuit reversal valve can realize various different mode of operation fuel oil configuration supplies.Using double peach cams of present invention design, each
The scopes of peach pair roller angle ф 1 are 80 °~110 °, and constant speed section angle ф 2 is 100 °~70 ° between two peaches.It is capable of achieving
Cam axle completes the function of fuel feeding for one week to two fuel injectors.
Closed type fuel regulator valve 3 engine occur power down situations such as magnetic valve 14 cannot go up electricity when, at draining cone valve
In normally off, remain able to continue to complete the effect of fuel feeding, the reliability of fuel system can be improved, improve engine work steady
It is qualitative.When the magnetic valve 14 of closed type fuel regulator valve 3 breaks down cannot work, draining oil circuit 13 cannot be opened, fuel oil
Fuel injector is constantly flowed into by fuel feed hole 11 and oil circuit 12, causes other hydraulic means such as closed type fuel regulator valve and fuel injector
Fuel pressure is constantly raised, and system may be damaged.Therefore, closed type fuel regulator valve is designed with safeguard protection dress
Put.The fuel pressure compression face of draining cone valve 18 is made up of compression face 20 and compression face 21.Controlled in traditional fuel oil open in usual
In valve, the two compression face areas are identical, by the hydraulic coupling for balancing.Closed type fuel regulator valve is by the fuel oil at the draining conical surface
Oil circuit is designed as stairstepping, increases the area of compression face 20, it is more than 1.2 with the area ratio of the area of compression face 21.Receive
Pressure F at pressure surface 2020＞ 1.2F21, when fuel pressure increases to a certain extent, F20+F2＞ F21+F1, at compression face 20
Pressure will open draining cone valve 18, and fuel oil flows back into low-pressure reservoir through draining oil circuit 13, drop the fuel pressure in system
It is low, protect the safety of normally close valve and other hydraulic means.
Closed type fuel regulator valve is normally off when electricity is not gone up, and after upper electricity, draining cone valve opens draining oil circuit.It is normally closed
Type fuel regulator valve can solve the problems, such as engine power down when fuel oil supply.By to fuel path at draining cone valve
Transformation, step type is designed as by oil circuit, changes the area of fuel pressure suffered by valve two ends, when magnetic valve breaks down, mistake
Fuel pressure high can push draining cone valve open, complete draining pressure relief.Band protection device closed type fuel regulator valve improves
Valve stability and security in itself, and then the reliability of the hydraulic means such as electronically controlled unit pump and fuel injector is improved, improve
The stability of engine operation.Fuel path reversal valve control fuel oil flow direction, can be switched fast fuel path, by controlling fuel oil
Oil circuit reversal valve can quickly realize the multi-mode working of various oil circuit configurations, and then realize that two delivery valves replace fuel feeding or two
Individual delivery valve is in varing proportions while the function of fuel feeding.The cooperation of magnetic valve and fuel path reversal valve is controlled by fuel oil, is changed
Become piezo-electric crystal signal magnitude and fuel oil control magnetic valve electromagnetic force size and form can realize the different fuel feeding moment and
Supply time.Can realize that cam angle rotates a circle to two flexible fuel feeding of fuel injector using the double peach cams designed by the present invention
Function, can effectively improve the operating efficiency of electronically controlled unit pump, improve engine efficiency, meet engine different operating modes,
Fuel feeding number of times, charge oil pressure and fuel delivery under different load need, and improve engine economy, dynamic property, and effectively reducing has
Evil discharge.
A kind of normally closed electronically controlled unit pump of multi-mode of the present invention, including the control of double peach cams 1, roller plunger 2, closed type fuel oil
Valve 3, fuel path reversal valve 4 and double delivery valves 5.The normally closed electronically controlled unit pump of multi-mode, its bottom is installed by roller plunger 2, roller
Closed type fuel regulator valve 3, fuel path reversal valve 4 is installed in the top of plunger 2 successively, and double delivery valves 5 are installed at the top of the pump housing 1.It is logical
Crossing double peach cams 1 promotes plunger to be pressed oil.The closed type fuel regulator valve, including magnetic valve 14, magnetic valve valve rod 15, electricity
Magnet valve spring 16, draining cone valve branch sleeve 17, draining cone valve 18 and draining cone valve spring 19.Magnetic valve 14 and draining cone valve 18
It is connected with the interference fit of draining cone valve branch sleeve 17 by magnetic valve valve rod 15.It is in normally off, upper electricity when not going up electricity
Afterwards draining is completed by controlling draining cone valve 18 to open draining oil circuit 13.The closed type fuel regulator valve, at its draining conical surface
Fuel path be designed as stairstepping, increase the area of compression face 20, it is more than with the area ratio of the area of compression face 21
1.2.When fuel pressure is excessive, the different stress that two ends difference lifting surface area causes can open draining cone valve and complete draining, protect
Protecting system security.The fuel path reversal valve, is equipped with piezo-electric crystal 22, preceding commutation valve rod 23, the and of reversal valve 24 thereon
Commutate valve rod 25 afterwards, and fuel path spacer block 26.When not receiving control signal, piezo-electric crystal 22 in the raw, is changed
Contacted with the left end of fuel path spacer block 26 to the right-hand member of valve 24, open right side oil circuit and close left side oil circuit, now fuel oil is through fuel-displaced
Valve 28 enters a fuel injector；When piezo-electric crystal 22 receives maximum control signal, piezo-electric crystal produces inverse piezoelectric activity elongation,
The left end of reversal valve 24 is contacted with the right-hand member of fuel path spacer block 26, is opened left side oil circuit and is closed right side oil circuit, now fuel oil warp
Delivery valve 27 enters a fuel injector；When the control signal that piezo-electric crystal 22 is received is between minimum and maximum, piezo crystals
Body extends by a certain percentage, and the ratio that now reversal valve 24 extends according to piezo-electric crystal opens both sides oil circuit, difference control simultaneously
Signal magnitude, the flow of both sides oil circuit is different.It is capable of achieving the multi-mode flexible configuration of several working ways.The multi-mode is normally closed
Electronically controlled unit pump, its cam is double peach cams, and the scopes of each peach pair roller angle ф 1 are 80 °~110 °, between two peaches
Constant speed section angle ф 2 is 100 °~70 °.Reversal valve realization is controlled to the flexible modulation of fuel path by piezo-electric crystal 22 and is matched somebody with somebody
Put, to realize that cam axle is completed to two functions of the flexible fuel feeding of fuel injector for one week.
Claims (3)
1. the normally closed electronically controlled unit pump of multi-mode, it is characterized in that：Including double peach cams, roller plunger, closed type fuel regulator valve, combustion
Oil circuit reversal valve, double delivery valves；Roller plunger includes roller, plunger, plunger spring, upper plug shell, lower plunger shell, roller peace
Mounted in the lower end of lower plunger shell, the top of plunger is located in upper plug shell, and the bottom of plunger is located in lower plunger shell, plunger outside
Plunger spring is set with, the upper end of plunger spring withstands on upper plug shell lower end, and the lower end part of plunger spring is in lower plunger shell
In, plunger cavity is formed between the inwall of plunger and upper plug shell, fuel feed hole, draining oil circuit and are respectively provided with upper plug shell
One oil circuit, plunger cavity connection fuel feed hole and the first oil circuit；Closed type fuel regulator valve include application valve body, the first electromagnetic valve body,
Magnetic valve valve rod, draining cone valve, draining cone valve valve rod, application valve body and the first electromagnetic valve body are arranged in juxtaposition, draining cone valve, draining
Cone valve valve rod is arranged in application valve body, and the first electromagnetic valve body connects the first end of draining cone valve by magnetic valve valve rod, lets out
Second end of oily cone valve is tapered end face, and tapered end face coordinates with its other application valve body, the connection of draining cone valve valve rod first end
Second end of draining cone valve, the second end of draining cone valve valve rod is withstood in draining cone valve spring, and draining cone valve spring is withstood on by it
Application valve body on, magnetic valve spring is installed on magnetic valve valve rod, at magnetic valve spring connect draining oil circuit, in application valve body
The second oil circuit that setting is communicated with the first oil circuit, draining cone valve valve rod intersects with the second oil circuit；Fuel path reversal valve bag
Piezo-electric crystal, preceding commutation valve rod, afterwards commutation valve body, commutation valve rod, fuel path spacer block are included, commutation housing is arranged side by side with piezo-electric crystal
Arrangement, commutation valve rod before piezo-electric crystal connection, preceding commutation valve rod is connected by preceding commutation valve rod little spring with steel ball, and steel ball withstands on
Commutation valve body on, afterwards commutate valve rod by spring be pressed in commutation valve body on, it is preceding commutation valve rod, preceding commutation valve rod little spring, steel ball,
Commutation valve body and rear commutation valve rod are arranged in commutation housing, and the first fuel-displaced oil circuit, second fuel-displaced is set in commutation housing
Oil circuit, the 3rd fuel-displaced oil circuit, the first fuel-displaced oil circuit, the second fuel-displaced oil circuit are communicated with the 3rd fuel-displaced oil circuit, the 3rd fuel-displaced oil circuit
In fuel path spacer block is set, the second oil circuit is stretched in commutation housing, and commutation valve body realizes the under the control of piezo-electric crystal
Two oil circuits and the first fuel-displaced oil circuit or the second fuel-displaced oil circuit communicate and the second oil circuit is fuel-displaced with the first fuel-displaced oil circuit and second
Oil circuit is communicated simultaneously；Double delivery valves include the first delivery valve and the second delivery valve, and the first delivery valve connects the first fuel-displaced oil circuit, the
Two delivery valves connect the second fuel-displaced oil circuit；Double peach cams are engaged with roller.
2. the normally closed electronically controlled unit pump of multi-mode according to claim 1, it is characterized in that：With the second oil on draining cone valve valve rod
The part that road intersects is respectively provided with the first compression face and the second compression face, and the first compression face and the second compression face are located at second respectively
The draining cone valve side and draining cone valve spring side of oil circuit, the area of the first compression face is not less than the second compression face area
1.2 times.
3. the normally closed electronically controlled unit pump of multi-mode according to claim 1 and 2, it is characterized in that：Each peach pair of double peach cams
Roller angle scope is 80 °~110 °, and constant speed section angle is 100 °~70 ° between two peaches.
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 CN104806408A (en) | 2015-07-29 |
| CN104806408B true 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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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE4133557C2 (en) * | 1991-10-10 | 2000-06-29 | Bosch Gmbh Robert | Control device for stopping an internal combustion engine |
| DE19738397A1 (en) * | 1997-09-03 | 1999-03-18 | Bosch Gmbh Robert | 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 |
| CN101871411B (en) * | 2010-06-11 | 2011-09-14 | 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 |
| 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
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| CN104806408A (en) | 2015-07-29 |
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