CN107401466A - High oil absorption power diesel engine single body pump - Google Patents
High oil absorption power diesel engine single body pump Download PDFInfo
- Publication number
- CN107401466A CN107401466A CN201710709335.4A CN201710709335A CN107401466A CN 107401466 A CN107401466 A CN 107401466A CN 201710709335 A CN201710709335 A CN 201710709335A CN 107401466 A CN107401466 A CN 107401466A
- Authority
- CN
- China
- Prior art keywords
- oil
- fuel
- valve
- valve rod
- plunger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 11
- 239000003921 oil Substances 0.000 claims abstract description 82
- 239000000446 fuel Substances 0.000 claims abstract description 36
- 239000000295 fuel oil Substances 0.000 claims abstract description 27
- 239000010426 asphalt Substances 0.000 claims abstract description 13
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000007921 spray Substances 0.000 description 4
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000005507 spraying Methods 0.000 description 2
- 230000036461 convulsion Effects 0.000 description 1
- 239000010727 cylinder oil Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
A kind of a kind of high oil absorption power diesel engine single body pump disclosed by the invention, it is desirable to provide monoblock pump that can improve oil suction road circulation area and oil sucting force.The technical scheme is that：Lower valve base below the circular conical surface of valve rod shaft end, the high-pressure oil duct of connection Conical Valve aperture of door and the low pressure oil duct for connecting central passage are formed with thereon, plunger is descending, plunger cavity volume increases, and plunger cavity fuel pressure reduces, and ball sealer leaves, form the oil-feed path of large area circulation, fuel oil, through low pressure oil duct, plunger cavity is flowed into by Conical Valve aperture of door and spacing ball seat centre bore from fuel inlet fitting；Plunger is up, plunger cavity volume reduces, fuel pressure increases, Conical Valve aperture of door is closed by ball sealer, cut-off fuel oil flows to low pressure oil duct (17) from Conical Valve aperture of door, the fuel oil in plunger cavity is forced, the valve rod necking down asphalt channel of valve rod necking segment formation can only be flowed through from high-pressure oil duct, fuel inlet fitting is flowed to by low pressure oil duct.So as to solve the problems, such as that oil suction road circulation area is small.
Description
Technical field
The present invention relates to a kind of diesel electric-controlled fuel injection equipment (FIE).
Background technology
Diesel electric-controlled monoblock pump has high injection pressure, distributive value and injection timing Flexible Control, injection system transformation
The advantages that small, there is very strong application prospect in high-power diesel engine field.Electronic Control for Diesel Engine monoblock pump refers to a cylinder
One oil pump, oil pump refer to high-pressure oil pump, or are injection pump.Monoblock pump UPS (UnitPumpSystem) belongs to single plunger
Pumping system (separate injection), the corresponding jerk fuel injection pump of each cylinder, can accurately control the spray for spraying into each cylinder
Oil mass.Between the high-pressure pump and injector assembly of monoblock pump, linked together by a very short high-pressure oil pipe.Automatically controlled monomer
Its oil pump that is mainly technically characterized by of pump shares a camshaft with valve actuating mechanism, structure is farthest simplified, and
Oil pump out of the mouth is shortened to the pipeline distance of fuel injector.But because pressure fuel pump and engine speed are directly proportional, slow-speed of revolution area
Domain pressure is relatively low, and is unfavorable for the raising of combustibility during diesel engine low speed.In order to adapt to more and more strict Abgasgesetz and
Fuel economy demand, the stage is required in national Ⅲ emission, the oil spout opening ways of fuel injector are still to be controlled by spring pressure.Enter
Enter the stage of state IV, positive injector need to be made into electric-controlled fuel injector, form fuel-injection pressure and accordingly bring up to 2500bar's
Dual-coil electromagnetic valve unit-pump system, and controlled using system conformance, to optimize whole course of injection, and multiple spray can be realized
Penetrate.The course of work of electronically controlled unit pump spraying system can be divided into following several stages：1 oil-absorbing process：2 bypass processes；3 sprayed
Journey；4 unloading process.Its operation principle is：Start time, high-speed electromagnetic valve are in opening, and high level is sent out when receiving ECU
When, electromagnetic force caused by solenoid valves makes stem movement, and the conical surface of valve rod front end closes back oil road.After closed electromagnetic valve,
Plunger establishes very high oil pressure under the driving of fuel cam in plunger cavity, and high pressure fuel enters high-pressure oil pipe, when oil pressure is big
When the Opening pressure of atomizer, fuel injection beginning.After drive signal is changed into low level, magnetic valve power-off, valve rod is in return spring
In the presence of return to free state, the hydraulic oil of plunger cavity is released to oil return circuit, and hydraulic oil overpressure declines, and needle-valve falls
Seat, injection process terminate.At present, electronically controlled unit pump is all the cone formed by valve rod and the pump housing by electromagnet band ovable valve stem
The switch of valve, the disengaging of fuel oil is controlled, the boosting of fuel oil is completed by plunger, coordinates the downward oil suction of motion of plunger, upwards pressure
Oil, high pressure is produced, control the course of injection of fuel oil.The access way of fuel oil is same passage, and its minimum actual internal area is cone
The circulation area of valve.Due to the needs of valve rod quick acting, the move distance of valve rod is general shorter, cause the aperture of cone valve compared with
Small, circulation area is smaller.In monoblock pump oil-absorbing process, plunger moves downward, and fuel oil can form high flowing speed at cone valve
Degree and negative pressure, cavitation occurs, cause fuel oil to generate bubble, because the generation and disappearance of bubble are unstable, so as to cause to spray
Oil is unstable, influences the operation stability of engine, the shortcomings that oil consumption height, high noise, poor discharge occurs.
The content of the invention
The present invention is in place of above-mentioned the shortcomings of the prior art, there is provided one kind can improve oil suction road circulation area and
The high oil absorption power diesel engine single body pump of oil sucting force.
Scheme is used by the present invention solves its technical problem：A kind of high oil absorption power diesel engine single body pump, there is one
It is powered under diesel engine ECU control, the He of the pump housing 2 of the electronically controlled unit pump for the electromagnet 13 that attraction armature 15 moves upwards
The upper valve base 9 being assemblied on the pump housing 2, the valve rod 8 being assemblied in upper valve base 9 and is located between spacing ball seat 4 and lower valve base 6
Ball sealer 5, it is characterised in that：The face of cylinder of valve rod 8 and the same footpath of the centre bore of upper valve base 9, form sealing surface；The necking segment axle of valve rod 8
The end up internal conical surface with the lower port of upper valve base 9 of circular conical surface is bonded to form sealing surface, and descending formation valve rod necking down oil circuit leads to
Road 19；Lower valve base 6 below the shaft end circular conical surface of valve rod 8, the He of high-pressure oil duct 18 positioned at central passage both sides is formed with thereon
Connect the low pressure oil duct 17 of central passage, central passage inscribed cone valve hole 20, the centering ball sealer 5 of Conical Valve aperture of door 20；Post
1 descending, the volume of plunger cavity 22 increase, the reduction of the fuel pressure of plunger cavity 22 are filled in, ball sealer 5 leaves the Conical Valve aperture of door of lower valve base 6
20 circular conical surface, the oil-feed path of large area circulation is formed, fuel oil is by from fuel inlet fitting 3, through low pressure oil duct 17, lower valve base 6
Central passage, and flow through Conical Valve aperture of door 20, and the centre bore of spacing ball seat 4 positioned at the lower section of ball sealer 5, finally flow into plunger
Chamber 22；Plunger 1 is up, and the volume of plunger cavity 22 reduces, and fuel pressure increase, ball sealer 5 is bonded the circular cone of Conical Valve aperture of door 20
Face, Conical Valve aperture of door 20 are closed by ball sealer 5, and cut-off fuel oil flows to low pressure oil duct 17 from Conical Valve aperture of door 20, forces plunger cavity
Fuel oil in 22, the valve rod necking down asphalt channel 19 of the necking segment of valve rod 8 formation can only be flowed through from high-pressure oil duct 18, passes through low pressure oil
Road 17 flows to fuel inlet fitting 3.
The present invention has the advantages that compared to prior art.
With high oil absorption.The present invention is using the hydraulic oil positioned at central passage both sides being formed with lower valve base 6
Road 18 and the low pressure oil duct 17 for connecting central passage, the Conical Valve aperture of door 20 of the inscribed above-mentioned high-pressure oil duct 18 of connection of central passage,
The centering ball sealer 5 of Conical Valve aperture of door 20, during plunger 1 moves downward, the pump housing 2 is fixed, between plunger 1 and the pump housing 2
Plunger cavity 22 volume increase, the fuel pressure of plunger cavity 22 reduces, and ball sealer 5 leaves the conical surface of the lower section of lower valve base 6, circular cone
Valve hole 20 is opened, and forms the larger oil-feed path of circulation area, and fuel oil is by from fuel inlet fitting 3, through low pressure oil duct 17, lower valve
The central passage of seat 6, and Conical Valve aperture of door 20 is flowed through, and the centre bore of spacing ball seat 4 positioned at the lower section of ball sealer 5, finally flow into
Plunger cavity 22；Plunger 1 is up, and the pump housing 2 is fixed, and the volume of the plunger cavity 22 between plunger 1 and the pump housing 2 reduces, plunger cavity
22 fuel pressure increase, ball sealer 5 are bonded the circular conical surface of Conical Valve aperture of door 20, and Conical Valve aperture of door 20 is closed by ball sealer 5, every
Disconnected fuel oil flows to low pressure oil duct 17 from Conical Valve aperture of door 20, forces the fuel oil in plunger cavity 22, can only be flowed through from high-pressure oil duct 18
The valve rod necking down asphalt channel 19 that the necking segment of valve rod 8 is formed, fuel inlet fitting 3 is flowed to by low pressure oil duct 17.It can cancel automatically controlled
The generally due oil transfer pump of unit-pump system, reduces product cost；Oil suction is abundant, avoids because the insufficient generation of oil suction is led
Cause oil spout unstable, the defects of influenceing engine operational stability.
Brief description of the drawings
Fig. 1 is the organigram of high oil absorption power diesel engine single body pump of the present invention.
Fig. 2 is Fig. 1 I to close-up schematic view.
Fig. 3 is Fig. 1 II to close-up schematic view.
1 plunger in figure, 2 pump housings, 3 fuel inlet fittings, 4 spacing ball seats, 5 ball sealers, 6 lower valve bases, 7 adjusting washers, 8 valve rods, 9
Upper valve base, 10 tight seats, 11 magnetic valve adjusting pads, 12 initial tension of spring adjusting pads, 13 electromagnet, 14 electromagnet springs, 15 armature,
16 armature damping springs, 17 low pressure oil ducts, 18 high-pressure oil ducts, 19 valve rod necking down asphalt channels, 20 Conical Valve aperture of doors, 21 fuel injectors
Oil duct, 22 plunger cavities.
Embodiment
Refering to Fig. 1, Fig. 2, Fig. 3.In embodiment described below, a kind of high oil absorption power diesel engine single body pump, have one
It is individual to be powered under diesel engine ECU control, the pump housing 2 of the electronically controlled unit pump for the electromagnet 13 that attraction armature 15 moves upwards
With the upper valve base 9 being assemblied on the pump housing 2, the valve rod 8 being assemblied in upper valve base 9 and it is located between spacing ball seat 4 and lower valve base 6
Ball sealer 5.The face of cylinder of valve rod 8 and the same footpath of the centre bore of upper valve base 9, form sealing surface；On the necking segment shaft end circular conical surface of valve rod 8
Row is bonded to form sealing surface with the internal conical surface of the lower port of upper valve base 9, descending formation valve rod necking down asphalt channel 19；Positioned at valve
Lower valve base 6 below the shaft end circular conical surface of bar 8, high-pressure oil duct 18 positioned at central passage both sides is formed with thereon and connects central passage
Low pressure oil duct 17, central passage inscribed cone valve hole 20, the centering ball sealer 5 of Conical Valve aperture of door 20；Plunger 1 is descending, plunger
The volume of chamber 22 increases, and the fuel pressure of plunger cavity 22 reduces, and ball sealer 5 leaves the circular conical surface of the Conical Valve aperture of door 20 of lower valve base 6, shape
Into the oil-feed path of large area circulation, fuel oil is by from fuel inlet fitting 3, through low pressure oil duct 17, the central passage of lower valve base 6, and
Conical Valve aperture of door 20, and the centre bore of spacing ball seat 4 positioned at the lower section of ball sealer 5 are flowed through, finally flows into plunger cavity 22；On plunger 1
OK, the volume of plunger cavity 22 reduces, and fuel pressure increase, ball sealer 5 is bonded the circular conical surface of Conical Valve aperture of door 20, Conical Valve aperture of door
20 are closed by ball sealer 5, and cut-off fuel oil flows to low pressure oil duct 17 from Conical Valve aperture of door 20, forces the fuel oil in plunger cavity 22, only
The valve rod necking down asphalt channel 19 of the necking segment of valve rod 8 formation can be flowed through from high-pressure oil duct 18, oil-feed is flowed to by low pressure oil duct 17
Joint 3.
In 1 upward motion process of plunger, electromagnet 13 is powered under diesel engine ECU control, attracts armature 15
Motion upwards, pull the valve rod 8 being connected with armature 15 to move upwards, compression electromagnet spring 14, cause valve rod necking down oil circuit to lead to
The closing in road 19, the fuel oil in plunger cavity 22 are compressed to fuel injector oil duct 21, and fuel oil enters high-pressure oil pipe, when oil pressure is more than spray
During the Opening pressure of oil nozzle, fuel injection beginning；When distributive value reaches diesel engine needs, electromagnet 13 is in diesel engine ECU
Control under power off, electromagnet spring 14 promote valve rod 8 move downward, cause the opening of valve rod necking down asphalt channel 19, high pressure
Fuel oil flows to low pressure oil duct 17 through valve rod necking down asphalt channel 19, and fuel pressure lowers, when oil pressure is less than the closing pressure of atomizer
During power, end of injection.
Claims (3)
1. a kind of high oil absorption power diesel engine single body pump, there is one and be powered under diesel engine ECU control, attract armature
(15) pump housing (2) of the electronically controlled unit pump of the electromagnet (13) moved upwards and the upper valve base (9) being assemblied on the pump housing (2), dress
Fit over the valve rod (8) in upper valve base (9) and the ball sealer (5) being located between spacing ball seat (4) and lower valve base (6), its feature
It is：The face of cylinder of valve rod (8) and upper valve base (9) same footpath of centre bore, form sealing surface；Valve rod (8) necking segment shaft end circular conical surface
The up internal conical surface with upper valve base (9) lower port is bonded to form sealing surface, descending formation valve rod necking down asphalt channel (19)；
Lower valve base (6) below the circular conical surface of valve rod (8) shaft end, be formed with thereon positioned at central passage both sides high-pressure oil duct (18) and
Connect the low pressure oil duct (17) of central passage, central passage inscribed cone valve hole (20), Conical Valve aperture of door (20) centering sealing
Ball (5)；Plunger (1) is descending, and plunger cavity (22) volume increase, plunger cavity (22) fuel pressure reduces, and ball sealer (5) leaves down
The circular conical surface of valve seat (6) Conical Valve aperture of door (20), forms the oil-feed path of large area circulation, fuel oil by from fuel inlet fitting (3),
Through low pressure oil duct (17), the central passage of lower valve base (6), and Conical Valve aperture of door (20) is flowed through, and below ball sealer (5)
Spacing ball seat (4) centre bore, finally flows into plunger cavity (22)；Plunger (1) is up, and the volume of plunger cavity (22) reduces, fuel oil pressure
Power increases, and the circular conical surface of ball sealer (5) fitting Conical Valve aperture of door (20), Conical Valve aperture of door (20) is closed by ball sealer (5), cut-off
Fuel oil flows to low pressure oil duct (17) from Conical Valve aperture of door (20), forces the fuel oil in plunger cavity (22), can only be from high-pressure oil duct
(18) the valve rod necking down asphalt channel (19) of valve rod (8) necking segment formation is flowed through, fuel inlet fitting is flowed to by low pressure oil duct (17)
(3)。
2. high oil absorption power diesel engine single body pump as claimed in claim 1, it is characterised in that：In plunger (1) upward motion process
In, electromagnet (13) is powered under diesel engine ECU control, attracts armature (15) to move upwards, pulls and armature (15)
The valve rod (8) of connection moves upwards, compression electromagnet spring (14), causes the closing of valve rod necking down asphalt channel (19), plunger
Fuel oil in chamber (22) is compressed to fuel injector oil duct (21), and fuel oil enters high-pressure oil pipe.
3. high oil absorption power diesel engine single body pump as claimed in claim 1, it is characterised in that：When oil pressure is more than the unlatching of atomizer
During pressure, fuel injection beginning；When distributive value reaches diesel engine needs, electromagnet (13) is under diesel engine ECU control
Power-off, electromagnet spring (14) promote valve rod (8) to move downward, cause the opening of valve rod necking down asphalt channel (19), high compression ignition
Oil flows to low pressure oil duct (17) through valve rod necking down asphalt channel (19), and fuel pressure lowers, when oil pressure is less than the closing of atomizer
During pressure, end of injection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710709335.4A CN107401466A (en) | 2017-08-18 | 2017-08-18 | High oil absorption power diesel engine single body pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710709335.4A CN107401466A (en) | 2017-08-18 | 2017-08-18 | High oil absorption power diesel engine single body pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107401466A true CN107401466A (en) | 2017-11-28 |
Family
ID=60396510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710709335.4A Pending CN107401466A (en) | 2017-08-18 | 2017-08-18 | High oil absorption power diesel engine single body pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107401466A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162849A (en) * | 2018-10-11 | 2019-01-08 | 成都威特电喷有限责任公司 | A kind of electronically controlled unit pump fuel oil loop structure |
| CN112761835A (en) * | 2021-01-14 | 2021-05-07 | 北京理工大学 | Automatically controlled components of a whole that can function independently monoblock pump |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5749717A (en) * | 1995-09-12 | 1998-05-12 | Deisel Technology Company | Electromagnetic fuel pump for a common rail fuel injection system |
| US6206044B1 (en) * | 1999-12-09 | 2001-03-27 | Eaton Corporation | By-pass solenoid with integral check valve |
| JP2004197756A (en) * | 2002-12-16 | 2004-07-15 | Aichi Koatsu Kk | Container valve with overfill preventing function and overrelease and overflow preventing function |
| CN1693695A (en) * | 2004-12-08 | 2005-11-09 | 成都威特电喷有限责任公司 | Diesel oil jet device with electric controller sundstrand pump |
| US20060159555A1 (en) * | 2005-01-19 | 2006-07-20 | Denso Corporation | High pressure pump having plunger |
| DE102010039974A1 (en) * | 2010-08-31 | 2012-03-01 | Robert Bosch Gmbh | Conveyor of a fuel supply system of an internal combustion engine |
| JP2013002459A (en) * | 2011-06-13 | 2013-01-07 | Nippon Soken Inc | Solenoid valve, and high-pressure pump using the same |
| CN104847554A (en) * | 2015-04-09 | 2015-08-19 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Electric control unit pump for diesel machine |
| CN105587452A (en) * | 2016-02-05 | 2016-05-18 | 成都威特电喷有限责任公司 | Electric unit pump with two-channel low-pressure oil internal circulation oil path |
| CN106224148A (en) * | 2016-08-02 | 2016-12-14 | 成都威特电喷有限责任公司 | Electrocontrolled high-pressure fuel injection equipment (FIE) with switching swivel nut |
-
2017
- 2017-08-18 CN CN201710709335.4A patent/CN107401466A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5749717A (en) * | 1995-09-12 | 1998-05-12 | Deisel Technology Company | Electromagnetic fuel pump for a common rail fuel injection system |
| US6206044B1 (en) * | 1999-12-09 | 2001-03-27 | Eaton Corporation | By-pass solenoid with integral check valve |
| JP2004197756A (en) * | 2002-12-16 | 2004-07-15 | Aichi Koatsu Kk | Container valve with overfill preventing function and overrelease and overflow preventing function |
| CN1693695A (en) * | 2004-12-08 | 2005-11-09 | 成都威特电喷有限责任公司 | Diesel oil jet device with electric controller sundstrand pump |
| US20060159555A1 (en) * | 2005-01-19 | 2006-07-20 | Denso Corporation | High pressure pump having plunger |
| DE102010039974A1 (en) * | 2010-08-31 | 2012-03-01 | Robert Bosch Gmbh | Conveyor of a fuel supply system of an internal combustion engine |
| JP2013002459A (en) * | 2011-06-13 | 2013-01-07 | Nippon Soken Inc | Solenoid valve, and high-pressure pump using the same |
| CN104847554A (en) * | 2015-04-09 | 2015-08-19 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Electric control unit pump for diesel machine |
| CN105587452A (en) * | 2016-02-05 | 2016-05-18 | 成都威特电喷有限责任公司 | Electric unit pump with two-channel low-pressure oil internal circulation oil path |
| CN106224148A (en) * | 2016-08-02 | 2016-12-14 | 成都威特电喷有限责任公司 | Electrocontrolled high-pressure fuel injection equipment (FIE) with switching swivel nut |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162849A (en) * | 2018-10-11 | 2019-01-08 | 成都威特电喷有限责任公司 | A kind of electronically controlled unit pump fuel oil loop structure |
| CN112761835A (en) * | 2021-01-14 | 2021-05-07 | 北京理工大学 | Automatically controlled components of a whole that can function independently monoblock pump |
| CN112761835B (en) * | 2021-01-14 | 2022-04-15 | 北京理工大学 | Automatically controlled components of a whole that can function independently monoblock pump |
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| AD01 | Patent right deemed abandoned |
Effective date of abandoning: 20240315 |