CN209100183U - A kind of monoblock pump of charge oil pressure stable regulation - Google Patents
A kind of monoblock pump of charge oil pressure stable regulation Download PDFInfo
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- CN209100183U CN209100183U CN201821101641.6U CN201821101641U CN209100183U CN 209100183 U CN209100183 U CN 209100183U CN 201821101641 U CN201821101641 U CN 201821101641U CN 209100183 U CN209100183 U CN 209100183U
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Abstract
The utility model relates to a kind of monoblock pumps of charge oil pressure stable regulation, the monoblock pump of charge oil pressure stable regulation is by fuel feeding group (1), fuel-displaced valve group (2), reservoir group (3), the monomer pump housing (4) composition, fuel feeding group (1) is arranged in the center bore of the monomer pump housing (4), reservoir group (3) is located at the upper surface of fuel feeding group (1), fuel-displaced valve group (2) connection fuel feeding group (1) and reservoir group (3), reservoir group (3) has reservoir (311), pressure sensor (32), the components such as pressure limiting valve (34) and proportion magnetic valve (35), injection cam driving fuel feeding group (1) rises fuel supply chamber fuel pressure, delivery valve is opened, high pressure fuel rapidly enters reservoir (311), pressure sensor (32) measures fuel pressure, electronic control unit is according to being set the goal Pressure controls the opening size of proportion magnetic valve (35), adjusts the quantity of fuel leakage in reservoir (311), realizes the stable regulation of reservoir (311) fuel pressure.
Description
One, technical field
The utility model relates to diesel engine high-pressure oil feed pump, the monoblock pump of specifically a kind of charge oil pressure stable regulation belongs to
In diesel engine fuel injecting technology.
Two, background technique
It is higher to diesel engine combustion requirement with the continuous improvement that diesel energy conservation and emissions reduction requires, need fine group
Knit the mixing of diesel engine oil gas.Current electronic control injection system can neatly control fuel injection parameter, become diesel engine improve burning,
Meet the essential technological means of emission regulation, the injection system of electronically controlled unit pump and Electrocontrolled high-pressure common rail is able to achieve oil spout ginseng
Number accurately controls, it is ensured that the accuracy of distributive value and injection timing.Electronically controlled unit pump is the structure basis in machinery unit pump
On, at the time of establishing pressure in solenoid valve control fuel supply chamber by installing additional and the duration, and then control fuel feeding moment and fuel feeding
Time realizes time type Injection Control.Due to realizing the foundation of fuel pressure using high-speed electromagnetic valve, rise in fuel cam
Stage, high-speed electromagnetic valve closing make fuel supply chamber become enclosed space, and plunger ascending motion compresses fuel oil in fuel supply chamber, fuel oil
Pressure can be increased constantly, be continued until that solenoid valve is opened；Opening when high-speed electromagnetic valve makes fuel supply chamber become open type space, with
Fuel oil aerial drainage, charge oil pressure can reduce rapidly.Therefore fuel pressure experience in fuel supply chamber is lasting to be risen, short-time fluctuations and rapidly
The change procedure of decline, the curve shape of charge oil pressure are triangle.Electronically controlled unit pump injection system can not form basicly stable
Charge oil pressure, make the spray penetration of fuel injector from be not able to maintain with fuel-oil atmozation quality stablize, it is good；Simultaneously because electromagnetism
Valve on-off action, can not achieve the adjusting and stabilization of charge oil pressure, and the Precise control for being unable to satisfy Fuel Injection Pressure of Diesel Engines is wanted
It asks, it is constant not to be able to maintain pressure in injection process.
The adjusting of charge oil pressure and stabilization can be controlled by the aerial drainage to high pressure fuel to realize, using pressure sensor and
Proportion magnetic valve forms closed-loop control system, realizes the adjusting and stabilization of fuel pressure, this technology is in high-pressure common rail oil injection
The common rail pipe pressure of system uses on adjusting, and control effect is reliable and stable.On electronically controlled unit pump body install additional pressure sensor and
Proportion magnetic valve replaces original high-speed electromagnetic valve, constitutes jointly Closed-loop pressure control with the electronic control unit of electronically controlled unit pump and returns
Road realizes that the charge oil pressure of monoblock pump adjusts and stablizes.In fuel cam ascent stage, the fuel feeding according to needed for diesel engine condition
Pressure target value, the fuel pressure of pressure sensor real-time detection fuel supply chamber, electronic control unit is according to fuel pressure difference, continuously not
It is disconnected to provide control wave, the aperture of proportion magnetic valve is adjusted in real time, makes to survey fuel pressure constantly close to target for oil pressure
Force value, to realize that the charge oil pressure of monoblock pump is stablized.
The function of increasing the stable regulation of charge oil pressure on electronically controlled unit pump, needs to redefine pressure sensor and ratio
The position of example solenoid valve, pattern, need to change the construction and arrangement of monoblock pump again, are just able to achieve and the installation of existing cylinder head
It is good compatible.
Three, summary of the invention
The purpose of this utility model is to solve the above technical problem, and it is uncontrollable not to make up electronically controlled unit pump charge oil pressure
Foot, the utility model is realized in this way: the monoblock pump of charge oil pressure stable regulation is by the monomer pump housing, fuel feeding group, delivery valve
The components such as group, pressure sensor, proportion magnetic valve and pressure limiting valve composition, in the knot for keeping the monomer pump housing and fuel feeding group section components
It, can be with existing cylinder cover for diesel engine installation compatibility under structure permanence condition.When injection cam drives fuel feeding group, so that fuel supply chamber
Fuel pressure rises, and pressure sensor detects the pressure of high pressure fuel, and electronic control unit is constantly regulate according to given goal pressure
The pulse signal duty ratio of proportion magnetic valve adjusts the leakage rate of the aperture control high pressure fuel of proportion magnetic valve, realizes fuel feeding
Pressure stable regulation, so having the characteristics that portable and replaceability is good in the case where not changing installation dimension.
Four, Detailed description of the invention
Fig. 1 is the monoblock pump of charge oil pressure stable regulation
Fig. 2 is fuel feeding group
Fig. 3 is fuel-displaced valve group
Fig. 4 is reservoir group
Fig. 5 is the monomer pump housing
Five, specific embodiment
The monoblock pump of charge oil pressure stable regulation is by fuel feeding group 1, fuel-displaced valve group 2, reservoir group 3 and 4 groups of the monomer pump housing
At as shown in Fig. 1.Fuel feeding group 1 is arranged in the center bore of the monomer pump housing 4, and reservoir group 3 is located at the upper surface of fuel feeding group 1, out
Oil valve group 2 connects fuel feeding group 1 and reservoir group 3.
Fuel feeding group 1 is made of idler wheel 11, tappet 12, plunger spring 13, plunger 14, plunger bushing 15 and plunger spring seat 16,
As shown in Fig. 2.Idler wheel 11 is located at fuel feeding group bottom, and idler wheel 11 is connect using needle bearing with tappet 12, and tappet 12 is by very
Cylinder 121 adjusts bolt 122 and locking nut 123, the composition of locating slot 124, adjusts 122 upper surface of bolt and plunger spring seat
16 directly contact, and 13 one end of plunger spring acts on the lower end surface of plunger bushing 15, in other end acting ram spring base 16, plunger
14 are made of boost section 141, guide section 142 and linkage section 143, and 143 lower end of plunger linkage section is caught in 16 elongated slot of plunger spring seat
In, guide section 142 is packed into 15 centre bore of plunger bushing, and plunger bushing 15 is by plunger cavity 151, connection screw thread 152, the first fuel feed hole
153, the first oil outlet 154, connection bolt 155 form, and plunger bushing 15 is connect by connecting bolt 155 with the monomer pump housing 4, plunger
Boost section 141 is located in plunger cavity 151, and fuel feed hole 153 is communicated with the oil input channel of the monomer pump housing 4.
Fuel-displaced valve group 2 is made of delivery valve 21, oil outlet valve spring 22, spring base 23, fuel-displaced gland 24, as shown in Fig. 3.
Delivery valve 21 is the check valve with conical surface seal, in the first oil outlet 154, the conical surface of delivery valve 21 and first fuel-displaced
The touching of 154 inner conical surface seated connection of hole, 21 upper surface of delivery valve are connect with one end of oil outlet valve spring 22, the other end and oil outlet valve spring seat
23 lower end face contacts, fuel-displaced gland 24 and 23 upper end face contact of oil outlet valve spring seat, the upper outer lug boss position of oil outlet valve spring seat 23
In the oil outlet of fuel-displaced gland 24.
Reservoir group 3 is by reservoir body 31, pressure sensor 32, oil outlet 33, pressure limiting valve 34, proportion magnetic valve 35
It is formed with reservoir pressure ring 36, as shown in Fig. 4.31 structure of reservoir body is hollow cylindrical body, and storage is disposed on cylindrical body
Grease chamber 311, pressure sensor connecting hole 312, the second oil outlet 313, electrically-controlled valve connection screw thread hole 314, the second fuel feed hole 315
Hole 316 is pressed with fuel-displaced valve deck, on fuel-displaced gland 24, reservoir pressure ring 36 will store oil by screw thread in fuel-displaced valve deck pressure 316 sets of hole
Chamber body 31 and plunger bushing 14 fasten, and pressure sensor 32 is screwed in pressure sensor connecting hole 312 and fastened, and proportion magnetic valve 35 is twisted
Enter and fastened in electrically-controlled valve connection screw thread hole 314, pressure limiting valve 34 is mounted on reservoir body 31 by connection screw thread.
The monomer pump housing 4 is made of cavity of resorption 41, centre bore 42, epicoele 43, fixation hole 44, oil return hole 45 and dowel hole 46,
As shown in Fig. 5.Idler wheel 11 is mounted in cavity of resorption 41, is adjusted bolt 122 and is located in centre bore 42, plunger 13 and plunger bushing 14
It is mounted in epicoele 43 from up to down, fastening bolt is fastened plunger bushing 14 and the monomer pump housing 4 by fixation hole 44.Oil return hole 42
It is connected to epicoele 43 and cavity of resorption 41, positioning screw, which is screwed into dowel hole 46, prevents tappet 12 from rotating.
The injection cam ascent stage jacks up idler wheel 11, and tappet 12 pushes plunger 13 to move upwards, and plunger 13 rises to closing the
One fuel feed hole 153, plunger 14 start the fuel oil in compression plunger chamber 151, and 151 fuel pressure of plunger cavity rises rapidly, fuel oil
Pressure is greater than 22 counter-force of oil outlet valve spring, and delivery valve 21 is opened, and high pressure fuel rapidly enters reservoir 311, pressure sensor 32
Reservoir fuel pressure is detected, electronic control unit constantly adjusts ratio electromagnetism according to actual measurement fuel pressure and target control pressure
The duty ratio of the pulse signal of valve 33, adjusts the opening size of proportion magnetic valve 35, and control enters the flow of draining chamber, reservoir
Fuel oil enters draining chamber by the centre bore of proportion magnetic valve core in 311, makes the pressure in reservoir close to target value, realizes single
The charge oil pressure stable regulation of body pump.
Claims (3)
1. a kind of monoblock pump of charge oil pressure stable regulation, it is characterized in that by fuel feeding group (1), fuel-displaced valve group (2), reservoir group
(3) and the monomer pump housing (4) composition, fuel feeding group (1) are arranged in the center bore of the monomer pump housing (4), and reservoir group (3) is located at fuel feeding
The upper surface of group (1), fuel-displaced valve group (2) connection fuel feeding group (1) and reservoir group (3).
2. a kind of monoblock pump of charge oil pressure stable regulation as described in claim 1, it is characterised in that independent reservoir group
Structure, reservoir group (3) are by reservoir body (31), pressure sensor (32), oil outlet (33), pressure limiting valve (34), ratio electricity
Magnet valve (35) and reservoir pressure ring (36) composition, reservoir body (31) structure is hollow cylindrical body, and storage is disposed on cylindrical body
Grease chamber (311), pressure sensor connecting hole (312), the second oil outlet (313), electrically-controlled valve connection screw thread hole (314), second into
Oilhole (315) and fuel-displaced valve deck pressure hole (316), fuel-displaced valve deck pressure hole (316) cover on fuel-displaced gland (24), reservoir pressure ring
(36) reservoir body (31) and plunger bushing (14) are fastened by screw thread, pressure sensor (32) screws in pressure sensor connecting hole
(312) fastening in, proportion magnetic valve (35) are screwed into fastening, pressure limiting valve (34) in electrically-controlled valve connection screw thread hole (314) and pass through connection
It is threadably mounted on reservoir body (31).
3. a kind of monoblock pump of charge oil pressure stable regulation as described in claim 1, it is characterised in that fuel-displaced valve group (2) connection
Fuel feeding group (1) and reservoir group (3), fuel-displaced valve group (2) are spring base (23), fuel-displaced by delivery valve (21), oil outlet valve spring (22)
Gland (24) composition, delivery valve (21) is the check valve with conical surface seal, in the first oil outlet (154), delivery valve
(21) the conical surface and the first oil outlet (154) inner conical surface seated connection touch, and the one of delivery valve (21) upper surface and oil outlet valve spring (22)
End connection, the other end and oil outlet valve spring seat (23) lower end face contact, fuel-displaced gland (24) and oil outlet valve spring seat (23) upper end
The upper outer lug boss of face contact, oil outlet valve spring seat (23) is located in the oil outlet of fuel-displaced gland (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821101641.6U CN209100183U (en) | 2018-07-12 | 2018-07-12 | A kind of monoblock pump of charge oil pressure stable regulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821101641.6U CN209100183U (en) | 2018-07-12 | 2018-07-12 | A kind of monoblock pump of charge oil pressure stable regulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209100183U true CN209100183U (en) | 2019-07-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821101641.6U Active CN209100183U (en) | 2018-07-12 | 2018-07-12 | A kind of monoblock pump of charge oil pressure stable regulation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209100183U (en) |
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2018
- 2018-07-12 CN CN201821101641.6U patent/CN209100183U/en active Active
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