CN109253004A - A kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly - Google Patents
A kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly Download PDFInfo
- Publication number
- CN109253004A CN109253004A CN201811359456.1A CN201811359456A CN109253004A CN 109253004 A CN109253004 A CN 109253004A CN 201811359456 A CN201811359456 A CN 201811359456A CN 109253004 A CN109253004 A CN 109253004A
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- oil
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- low pressure
- pressure
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- 239000000446 fuel Substances 0.000 title claims abstract description 77
- 238000002347 injection Methods 0.000 title claims abstract description 31
- 239000007924 injection Substances 0.000 title claims abstract description 31
- 239000003921 oil Substances 0.000 claims abstract description 280
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 239000000295 fuel oil Substances 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims description 18
- 238000011084 recovery Methods 0.000 claims description 12
- 238000004064 recycling Methods 0.000 claims description 3
- 230000004992 fission Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 21
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000000712 assembly Effects 0.000 abstract description 3
- 238000000429 assembly Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 230000008569 process Effects 0.000 description 7
- 239000000047 product Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000012356 Product development Methods 0.000 description 1
- -1 aluminium gold Chemical compound 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000000641 cold extrusion Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000007514 turning Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
-
- 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
-
- 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)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assemblies, including the two in separate structure and main valve seat interconnected and plunger bushing, low pressure oil pocket is equipped in main valve seat, high-voltage oil cavity is equipped in plunger bushing, the main valve seat is equipped with the oil-inlet mechanism of addition fuel oil intracavitary to low pressure oil and adjusts the fuel control mechanism that low pressure oil pocket enters the amount of fuel of high-voltage oil cavity, being equipped in the plunger bushing makes high-voltage oil cavity from the intracavitary oil inlet of low pressure oil and externally fuel-displaced plunger, one end of the plunger bushing, which is equipped with, is connected to the two logical oil valve components opened and closed with high-voltage oil cavity for controlling low pressure oil pocket.A kind of High Pressure Common-Rail Fuel Inject of the invention high-pressure fuel injection pump assembly has the characteristics that simple and compact for structure, production and processing is at low cost, assembly is convenient.
Description
Technical field
The present invention relates to a kind of high-pressure fuel injection pump assemblies, more specifically more particularly to a kind of diesel engine high-pressure co-rail fuel oil
Spraying system high-pressure fuel injection pump assembly.
Background technique
Increasingly strict with emission regulation, high pressure common rail fuel injection system has become diesel fuel injection system
Mainstream.The electronic control technology of diesel engine obtains better discharge index, power performance and economic performance for diesel engine and provides
Realistic possibility.High-pressure oil pump is the important component of high pressure common rail fuel injection system, and technical level directly determines
Reliability, dynamic property, the economy of end product.Therefore, how to improve high-pressure oil pump for oil-proofness, supply capability, can
Installation is low with processing cost is reduced, the problem of just must be taken into consideration at product development.
With high-pressure oil pump, its oil pump body is overall structure to existing traditional High Pressure Common-Rail Fuel Inject,
There are the problem of have: 1, complex contour, the main technique using hot forging or cold extrusion prepare blank, and shape gets over complicated production technique
More complicated, cost is higher, and the probability of defective products is higher out, while the fusing point of steel is high, what the processing of labyrinth needed to process
Time is long, and the energy consumption heated accordingly is high, and environmental pollution is relatively high.2, during blank processing finished product, structure is complicated, weight
The heart deviates the primary structure centre of gyration, the process equipment of institute's some need blank rotation processing, and the bias for requiring to do fixture is matched
Weight, since the manufacture of blank belongs to coarse processing, the low outer dimension of precision and weight have difference, if eccentrically mounted weight is done well, by
In centrifugal force, high-speed rotating equipment precision can be had damage, simultaneous processing precision can also reduce.3, the whole knot of oil pump body
Structure can not be processed come clamping workpiece with the common scroll chuck of lathe due to complex contour, need to be designed and be customized and be dedicated
Fixture is installed on lathe, reduces the versatility of lathe, increases the Operational preparation time, reduces efficiency, increases cost.
Summary of the invention
The purpose of the present invention is to provide a kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assemblies, have
Feature simple and compact for structure, production and processing is at low cost, assembly is convenient.
Technical scheme is as follows:
A kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly, including the two is in separate structure and mutual
The main valve seat and plunger bushing of connection are equipped with low pressure oil pocket in main valve seat, are equipped with high-voltage oil cavity in plunger bushing, on the main valve seat
Enter the oil mass tune of the amount of fuel of high-voltage oil cavity with adjusting low pressure oil pocket equipped with the oil-inlet mechanism to the intracavitary addition fuel oil of low pressure oil
Mechanism is saved, being equipped in the plunger bushing makes high-voltage oil cavity from the intracavitary oil inlet of low pressure oil and externally fuel-displaced plunger, the column
One end of plug sleeve, which is equipped with, is connected to the two logical oil valve components opened and closed with high-voltage oil cavity for controlling low pressure oil pocket.
Further, the main valve seat is equipped with for recycling the oil return mechanism for leaking out fuel oil in high-voltage oil cavity.
Further, the main valve seat is equipped with the exhaust gear for emptying low pressure oil intracavity gas.
Further, the oil-inlet mechanism includes oil inlet strainer and hollow structure and the oil inlet spiral shell being connected to low pressure oil pocket
Bolt, the oil inlet strainer are fixed on the inner wall of oil inlet bolt, and the side wall of the oil inlet bolt is equipped with through the side wall
Fuel feed hole, the oil inlet bolt are mounted on main valve seat.
Further, the fuel control mechanism is proportion magnetic valve, and proportion magnetic valve outer wall, which is equipped with, is located at ratio
The second sealing ring between the oil inlet end and oil outlet of solenoid valve and with the sealing cooperation of low pressure oil pocket, the low pressure oil pocket includes position
Second low pressure oil pocket of the first low pressure oil pocket in the oil inlet end of proportion magnetic valve and the oil outlet positioned at proportion magnetic valve, it is described
First low pressure oil pocket is connected to oil-inlet mechanism, and the second low pressure oil pocket is connected to by two logical oil valve components with high-voltage oil cavity, institute
The oil inlet end for stating proportion magnetic valve is equipped with solenoid valve strainer.
Further, the high-voltage oil cavity runs through the both ends of plunger bushing, and one end of the plunger is positioned at high pressure oil
Intracavitary built-in end, the plunger other end are the drive connection end for being pierced by plunger bushing and connecting with driving mechanism.
Further, the two logical oil valve components include the two two logical font interconnected and integrate fuel-displaced head, institute
State it is integrated go out oil head in be equipped with connection oil pocket and oil outlet chamber, the logical font of described two be equipped with by low pressure oil pocket with connect oil pocket
First font hole of connection will connect the second font hole for being connected to high-voltage oil cavity of oil pocket and by high-voltage oil cavity and oil outlet chamber company
Logical third font hole is equipped with for making fuel oil from low pressure oil pocket to connection oil pocket one-way flow in the connection oil pocket
One ball valve, the oil outlet chamber is interior to be equipped with for making second ball valve of the fuel oil from high-voltage oil cavity to oil outlet chamber one-way flow.
Further, first ball valve include the first ball valve spring base, the first ball valve spring and can with first oil
The first switch ball of bore sealing cooperation, the first ball valve spring be located at the first ball valve spring base and first switch ball it
Between, the second ball valve includes the second ball valve spring base, the second ball valve spring and can open with the second of third font hole sealing cooperation
Ball is closed, the second ball valve spring is between the second ball valve spring base and second switch ball, in the integrated oil head out
It is integrated outside fuel-displaced head equipped with connection and the oil outlet of oil outlet chamber, position that the first font hole is matched with first switch ball and the
The position that three font holes are matched with second switch ball is respectively positioned on the same end of two logical fonts.
Further, the side wall of the plunger is equipped with annular oil-recovery tank, and the oil return mechanism is that hollow oil return connects
Head, the plunger bushing are equipped with third and connect through-hole, and the main valve seat is equipped with the 4th connection through-hole, the annular oil return
High-voltage oil cavity, third connection through-hole, the 4th connection through-hole and back leakage connection at slot are sequentially communicated.
Further, the main valve seat is equipped with the gas vent of connection main valve seat lateral wall and low pressure oil pocket, described
Exhaust gear is the exhaust bolt that can be sealingly mounted in gas vent.
The device have the advantages that are as follows:
1. a kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly of the invention, high-pressure oil pump main body
It is made of the two main valve seat interconnected and plunger bushing, both shape is simple for the main valve seat and plunger bushing of separate structure, body
Product is small, easy to manufacture, energy consumption is low, qualification rate is high, at low cost；Compared with traditional high-pressure oil pump main body, weight of the invention can
20% or so are reduced, when heat treatment improves surface hardness and wearability, heat treatment is by weight processing charges, and weight is got over
Reheating processing cost is higher, and production and processing cost is substantially reduced；Simultaneously because weight reduces, entirely produces, stores in a warehouse and transported
Cost in journey also accordingly reduces；Therefore, a kind of High Pressure Common-Rail Fuel Inject high-pressure oil pump of the invention is total
At have the characteristics that it is simple and compact for structure, production and processing it is at low cost, assembly it is convenient；
2. the oil-inlet mechanism used is equipped with oil inlet strainer, the fuel control mechanism of use is equipped with solenoid valve strainer, makes fuel oil
By filtering twice, it is ensured that into the cleannes of the fuel oil of high-voltage oil cavity, reduce a kind of diesel engine high-pressure co-rail combustion of the invention
The failure rate of Electronic fuel injection system high-pressure fuel injection pump assembly extends a kind of High Pressure Common-Rail Fuel Inject of the invention and uses
The service life of high-pressure fuel injection pump assembly；
3. liang logical oil valve component includes the two two logical font interconnected and integrates fuel-displaced head, the integrated oil head out
It is interior to be equipped with connection oil pocket and oil outlet chamber, two logical fonts be equipped with by low pressure oil pocket with connect the first font hole that oil pocket is connected to, by
Connect oil pocket the second font hole being connected to high-voltage oil cavity and the third font hole for being connected to high-voltage oil cavity with oil outlet chamber, connection
Being equipped in oil pocket makes fuel oil from low pressure oil pocket to the first ball valve for connecting oil pocket one-way flow, and being equipped in oil outlet chamber makes fuel oil from height
Pumping cavity to oil outlet chamber one-way flow the second ball valve, it is required using the structure of the first ball valve and second two ball valves of ball valve
The cost of process equipment is low, processing precise degree require it is low, process time is shorter, and the probability of waste product is low out, reduce equipment investment and
Cost of labor；
4. the side wall of plunger is equipped with annular oil-recovery tank, and high-voltage oil cavity, third are connected through-hole, the 4th by annular oil-recovery tank
Connection through-hole and back leakage connection are sequentially communicated, to be collected to the fuel oil leaked between plunger bushing and plunger；And existing skill
Art needs to add the technique of electrochemical deburring or the technique of Direct Electrolysis using turning using processing decompression oil-recovery tank in plunger hole,
And size and presentation quality inspection have difficulties, meanwhile, electrolysis belongs to special work post, and electrolyte needed for being electrolysed belongs to slant acidity with high salt
Solution, need replacing after used some cycles, the waste liquid category heavily contaminated substance of replacement, in line harm is big, needs at professional institution
Reason, it is at high cost；Difficulty of processing of the present invention is low, processes annular oil-recovery tank in plunger outer wall, direct lathe grinding processing generates
Burr can be fallen by grinder buffing, the small burr that cylindricalo grinding generates can be polished off with Soft grinding wheel, processing cost is low,
High-efficient, size and quality are easy to detect and control, and also solve the Precision Machining for adding annular groove device to hole in plunger bushing high-voltage oil cavity
It is affected, horn mouth easily occur in annular groove two sides, part increases the problem of plunger matching parts fit clearance reduces seal length.
Detailed description of the invention
In order to illustrate more clearly of the embodiment of the present invention or technical solution in the prior art, below will to embodiment or
Attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
The embodiment of the present invention for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of cross-sectional view of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly；
Fig. 2 is a kind of right view of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly；
Fig. 3 is the portion the A enlarged drawing of Fig. 1；
Fig. 4 is that two logical oil valve components face enlarged drawing；
Fig. 5 is two logical oil valve component cutaway view Amplified images；
Fig. 6 is that integrated oil head out looks up enlarged drawing；
Fig. 7 is two logical font top perspective views；
Fig. 8 is the A-A cutaway view Amplified image of Fig. 7；
Fig. 9 is the B-B cutaway view Amplified image of Fig. 7.
Wherein: 1- main valve seat, 2- plunger bushing, 3- plunger, 4- two lead to oil valve component, 5- oil inlet strainer, 6- oil inlet bolt, 7-
Proportion magnetic valve, 8- plunger spring, 9- back leakage connection, 10- low pressure oil pocket, the connection of 11- second through-hole, the connection of 12- the 4th through-hole,
20- high-voltage oil cavity, the connection of 21- first through-hole, 22- third connect through-hole, 30- annular oil-recovery tank, 31- plunger spring seat, 41- two
The integrated oil head out of logical font, 42-, the first ball valve of 43-, the second ball valve of 44-, 45- positioning pin, 60- fuel feed hole, 61- first are sealed
Circle, the second sealing ring of 71-, 72- solenoid valve strainer, 73- energization plug-in unit, 74- third sealing ring, the 5th sealing ring of 91-, 92-
One seal washer, the second seal washer of 100-, the first low pressure of 101- oil pocket, the second low pressure of 102- oil pocket, hexagonal in 111- first
Screw, the second soket head cap screw of 112-, the first font of 411- hole, the second font of 412- hole, 413- third font hole, 420- are fuel-displaced
Hole, 421- connection oil pocket, 422- oil outlet chamber, the first ball valve of 431- spring base, the first ball valve of 432- spring, 433- first switch
Ball, the second ball valve of 441- spring base, the second ball valve of 442- spring, 443- second switch ball, the 4th sealing ring of 451-, 0- are vented spiral shell
Nail.
Specific embodiment
With reference to embodiment, technical solution of the present invention is described in further detail, but do not constituted pair
Any restrictions of the invention.
Embodiment
Shown in refering to fig. 1~9, a kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly of the invention,
Including the two in separate structure and main valve seat interconnected 1 and plunger bushing 2, main valve seat 1 is interior to be equipped with low pressure oil pocket 10, plunger bushing
High-voltage oil cavity 20 is equipped in 2, main valve seat 1 is equipped with to the oil-inlet mechanism for adding fuel oil in low pressure oil pocket 10 and adjusts low pressure oil pocket
10 enter the fuel control mechanism of the amount of fuel of high-voltage oil cavity 20, and being equipped in plunger bushing 2 makes high-voltage oil cavity 20 from low pressure oil pocket
Oil inlet and externally fuel-displaced plunger 3 in 10, one end of plunger bushing 2, which is equipped with, to be connected to for controlling low pressure oil pocket 10 with high-voltage oil cavity 20
Two logical oil valve components 4 of opening and closing.
In the present embodiment, main valve seat 1 is fixedly connected with plunger bushing 2 by the first soket head cap screw 111, hexagonal spiral shell in first
It is additionally provided with elastic washer and plain washer between the nut and main valve seat 1 or plunger bushing 2 of nail 111, makes to fix stronger.In addition,
Other connection types can be used to connect instead of the first soket head cap screw 111.
Because main valve seat 1 and plunger bushing 2 adopt a split structure, the casting processing of aluminium gold, plunger bushing 2 is can be used in main valve seat 1
It is processed using steel hot forging identical with tradition or by the way of squeezing.Main valve seat 1 is using aluminium alloy casting processing, vertical and water
Flat pore structure can directly be cast out, and tool can save material, can reduce energy consumption, can reduce chipping allowance, processing can be improved
Efficiency can reduce cutter consumption, can reduce the characteristics of manufacturing cost.Meanwhile aluminium alloy is easier to cut, and processes beat faster,
Production efficiency is higher, so that presentation quality is easier to ensure that；Power needed for cutting is smaller, machine lower to the rigid requirements of lathe
Bed transmission and positioning mechanism stress are small, wear small, extension service life of equipment；Accessory appearance is not easy to get rusty, and reduces antirust oil plant
Use.
Main valve seat 1 is equipped with for recycling the oil return machine for leaking out fuel oil between 20 inner prop plug sleeve 2 of high-voltage oil cavity and plunger 3
Structure.
Main valve seat 1 is equipped with the exhaust gear for emptying gas in low pressure oil pocket 10.
Oil-inlet mechanism includes oil inlet strainer 5 and hollow structure and the oil inlet bolt 6 being connected to low pressure oil pocket 10, oil inlet strainer
5 are fixed on the inner wall of oil inlet bolt 6, and the side wall of oil inlet bolt 6 is equipped with the fuel feed hole 60 through the side wall, oil inlet bolt 6
It is mounted on main valve seat 1.The fuel feed hole 60 of oil inlet bolt 6 is connected to external oil inlet pipe, while being additionally provided with use in oil inlet bolt 6
The first sealing ring 61 sealed when being combined with external oil inlet pipe.
Fuel control mechanism is proportion magnetic valve 7, and 7 outer wall of proportion magnetic valve is equipped with the oil inlet positioned at proportion magnetic valve 7
The second sealing ring 71 between end and oil outlet and with the sealing cooperation of low pressure oil pocket 10, low pressure oil pocket 10 include being located at ratio electromagnetism
Second low pressure oil pocket 102 of the first low pressure oil pocket 101 of the oil inlet end of valve 7 and the oil outlet positioned at proportion magnetic valve 7, first is low
Pumping cavity 101 is connected to oil-inlet mechanism, and the second low pressure oil pocket 102 is connected to by two logical oil valve components 4 with high-voltage oil cavity 20, ratio
The oil inlet end of solenoid valve 7 is equipped with solenoid valve strainer 72.Proportion magnetic valve 7 is equipped with for controlling the logical of the opening and closing of proportion magnetic valve 7
Electric plug 73, plunger bushing 2 are equipped with the first connection through-hole 21, and main valve seat 1 is equipped with the second connection through-hole 11, main valve seat 1 and column
Plug sleeve 2 is equipped with third sealing ring 74 in the connectivity part for being located at the first connection through-hole 21 and the second connection through-hole 11.Connect by first
It connects hole 21 and two logical oil valve components 4 is connected to by the second connection through-hole 11 with the second low pressure oil pocket 102.By using ratio electromagnetism
Valve 7 control oil inlet quantity, can accurately control High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly fuel delivery and
Pressure, to meet higher emission request.
In the present embodiment, proportion magnetic valve 7 is mounted on main valve seat 1 by the second soket head cap screw 112, proportion magnetic valve
7 and second are equipped with elastic washer between soket head cap screw 112.
Plunger 3 runs through the both ends of plunger bushing 2, and one end of plunger 3 is the built-in end in high-voltage oil cavity 20, and plunger 3 is another
One end is to be pierced by plunger bushing 2, the drive connection end for connecting driving mechanism.It is drivingly connected end and passes through tappet body component and driving
Mechanism connection.
It is drivingly connected end and is equipped with plunger spring seat 31, plunger spring 8 is equipped between plunger spring seat 31 and plunger bushing 2.Column
Plug 3 is drivingly connected end connection by it and follows driving upstream or downstream.It is prevented by the self-suction of plunger 3 and high-voltage oil cavity 20
Plunger 3, plug spring base 31 and plunger spring 8 fall off, which is that the air of emptying high-voltage oil cavity 20 when being pressed plunger 3 generates
Negative pressure.Self-suction is slightly larger than elastic force when 8 maximum length of plunger spring.
Two logical oil valve components 4 include the logical fonts 41 of the two interconnected two and integrate fuel-displaced head 42, integrate oil head 42
It is interior to be equipped with connection oil pocket 421 and oil outlet chamber 422, two logical fonts 41 be equipped with by low pressure oil pocket 10 with connect what oil pocket 421 was connected to
First font hole 411, the second font hole 412 that is connected to high-voltage oil cavity 20 of oil pocket 421 will be connected and by high-voltage oil cavity 20 and
The third font hole 413 that oil outlet chamber 422 is connected to, connection oil pocket 421 is interior to be equipped with for making fuel oil from low pressure oil pocket 10 to connection oil
First ball valve 43 of 421 one-way flow of chamber, oil outlet chamber 422 is interior to be equipped with for keeping fuel oil single from high-voltage oil cavity 20 to oil outlet chamber 422
To the second ball valve 44 of flowing.Two logical fonts 41 with integrate fuel-displaced head 42 and be fixedly connected by positioning pin 45, integrate oil head 42
It is fixedly connected with plunger bushing 2 and integrates and be equipped with the 4th sealing ring 451 between oil head 42 and plunger bushing 2.Two logical 41 sum aggregates of font
Integrate oil inlet and oil outlet structure at oil head 42 out, structure is simple, is easily installed and processes.
First ball valve 43 includes the first ball valve spring base 431, the first ball valve spring 432 and can be with the first font hole 411
Seal the first switch ball 433 of cooperation, the first ball valve spring 432 be located at the first ball valve spring base 431 and first switch ball 433 it
Between, the second ball valve 44 includes the second ball valve spring base 441, the second ball valve spring 442 and can match with the sealing of third font hole 413
The second switch ball 443 of conjunction, the second ball valve spring 442 is between the second ball valve spring base 441 and second switch ball 443, collection
The oil outlet 420 that connection integrates 42 outside and oil outlet chamber 422 of fuel-displaced head is equipped at oil head 42 out, the first font hole 411 and the
The position that the position and third font hole 413 that one switch ball 433 matches are matched with second switch ball 443 is respectively positioned on two logical oil
The same end of seat 41.Second ball valve spring base 441 is hollow structure, and oil outlet chamber 422 passes through the second ball valve spring of hollow structure
Seat 441 is connected to oil outlet 420.
In the present invention, the extending direction of the relatively integrated oil head 42 out of oil outlet 420 is obliquely installed, also, is located at plunger bushing 2
One end outlet in outside is located at the middle part of integrated oil head 42 out.Directly conventional junction is replaced with an oil outlet being obliquely installed 420
Multiple accessory composite structure in structure realizes fuel-displaced function, i.e., the spelling optimizing between two logical oil valve components 4, simplify part
It connects, Integration Design, greatly reduces the difficulty of processing, assemble simpler.In addition, two logical oil valve components 4 use internal ball valve
Precision Machining is not needed, required equipment cost is low；It solving for a long time the phenomenon that using will appear leakage later, it is general to reduce failure
Rate improves reliability, reduces maintenance cost, economizes on resources.Conservative measuring and calculating, two logical oil valve components 4 are than traditional structure cost of investment
15% is reduced, manufacturing cost reduces by 25%, and potential maintenance cost reduces 30%.
The side wall of plunger 3 is equipped with annular oil-recovery tank 30, and oil return mechanism is hollow back leakage connection 9, and plunger bushing 2 is equipped with
Third connects through-hole 22, and main valve seat 1 is equipped with the 4th connection through-hole 12, and annular oil-recovery tank 30 connects high-voltage oil cavity 20, third
Through-hole the 22, the 4th connects through-hole 12 and back leakage connection 9 is sequentially communicated.Main valve seat 1 is connecting through-hole 22 positioned at third with plunger bushing 2
The 5th sealing ring 91 is equipped with the connectivity part of the 4th connection through-hole 12.It is close that the junction of main valve seat 1 and back leakage connection 9 is equipped with first
Seal washer 92.One end that back leakage connection 9 is located at the outside of main valve seat 1 is connected to outside oil return circuit, due to the compressibility of fuel oil,
The oil-recovery tank 30 of inertia and plunger 3 is pressed in chamber 20 in height generates pressure wave, and height, which is pressed in chamber 20, to be generated to 9 direction of back leakage connection
Return pressure.
Main valve seat 1 is equipped with the gas vent of connection main valve seat 1 lateral wall and low pressure oil pocket 10, and exhaust gear is that can seal
The exhaust bolt 0 being mounted in gas vent.The second seal washer 100 is equipped between exhaust bolt 0 and main valve seat 1.The exhaust spiral shell
Nail 0 is located at the side of main valve seat 1, with oil inlet bolt 6 on same cross section.A kind of diesel engine high-pressure co-rail fuel oil of the invention
When spraying system is worked for the first time with high-pressure fuel injection pump assembly, exhaust bolt 0 need to be removed, the air in internal pipeline road is emptied,
It avoids high-pressure fuel injection pump assembly due to being vented unsmooth the phenomenon that leading to not starting, while also preventing air and entering high-voltage oil cavity 20
In, avoid the cavitation of part.
The course of work of the invention is as follows:
Before High Pressure Common-Rail Fuel Inject is worked for the first time with high-pressure fuel injection pump assembly, exhaust bolt 0 need to be removed,
Empty air in internal pipeline road.
When High Pressure Common-Rail Fuel Inject is started to work with high-pressure fuel injection pump assembly, fuel oil by oil inlet bolt 6 simultaneously
By oil inlet strainer 5 enter proportion magnetic valve 7 oil inlet end, i.e. the first low pressure oil pocket 101, through solenoid valve strainer 72 filtering after,
External electric signal, which is inputted, by energization plug-in unit 73 controls the unlatching of proportion magnetic valve 7, fuel oil enters the oil outlet of proportion magnetic valve 7,
That is the second low pressure oil pocket 102.Fuel oil is from the oil circuit that the first font hole 411 enters two logical oil valve components 4.At this point, plunger
Spring base 31 is pushed plunger 3 and tappet body component to follow drive shaft downlink, two logical oil valve portions by the spring-force driven dual of plunger spring 8
It is opened in part 4 for the first ball valve 43 of oil inlet, connection oil pocket 421 and two logical fonts 41 of the fuel oil through integrated delivery connection 42
Second font hole 412 enters high-voltage oil cavity 20；Plunger 3 and tappet body component follow drive shaft uplink, use in two logical oil valve components 4
It closes in the first ball valve 43 of oil inlet and is sealed against each other with main valve seat 2, the interior pressure rise of high-voltage oil cavity 20, for fuel-displaced second
Ball valve 44 is opened, third font hole 413 of the fuel oil through two logical fonts 41, integrated delivery connection 42 oil outlet chamber 422 and oil outlet
420 enter external oil pipe, complete a fuel feeding circulation；High-voltage oil cavity 20 pass through the fuel oil that is leaked between plunger bushing 2 and plunger 3 into
Enter annular oil-recovery tank 30, fuel tank is returned to through back leakage connection 9 by the oil circuit on plunger bushing 2 and main valve seat 1.
The present invention can apply in the oil common rail system of Light-duty Vehicle, and 50KW engine below can be flexibly matched with,
Fuel feeding efficiency can achieve 85%, the installation number of this High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly can be with
It is determined according to the cylinder number of engine.
What has been described above is only a preferred embodiment of the present invention, it should be pointed out that for those skilled in the art,
It without departing from the structure of the invention, can also be to this High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly
Several modifications and improvements are made, these all will not influence the effect and patent practicability that the present invention is implemented.
Claims (10)
1. a kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly, which is characterized in that including the two in fission
Structure and main valve seat interconnected (1) and plunger bushing (2), main valve seat (1) is interior to be equipped with low pressure oil pocket (10), in plunger bushing (2)
Equipped with high-voltage oil cavity (20), the main valve seat (1) is equipped with oil-inlet mechanism and tune to addition fuel oil in low pressure oil pocket (10)
The fuel control mechanism that low pressure oil pocket (10) enter the amount of fuel of high-voltage oil cavity (20) is saved, is equipped in the plunger bushing (2)
Make high-voltage oil cavity (20) from low pressure oil pocket (10) interior oil inlet and externally fuel-displaced plunger (3), one end of the plunger bushing (2) is equipped with
The two logical oil valve components (4) opened and closed are connected to high-voltage oil cavity (20) for controlling low pressure oil pocket (10).
2. a kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly according to claim 1, feature
It is, the main valve seat (1) is equipped with for recycling the oil return mechanism for leaking out fuel oil in high-voltage oil cavity (20).
3. a kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly according to claim 1, feature
It is, the main valve seat (1) is equipped with the exhaust gear for emptying low pressure oil pocket (10) interior gas.
4. according to claim 1 to a kind of High Pressure Common-Rail Fuel Inject high-pressure oil pump described in 3 any one
Assembly, which is characterized in that the oil-inlet mechanism includes oil inlet strainer (5) and hollow structure and is connected to low pressure oil pocket (10)
Oil inlet bolt (6), the oil inlet strainer (5) are fixed on the inner wall of oil inlet bolt (6), the side wall of the oil inlet bolt (6)
It is equipped with the fuel feed hole (60) through the side wall, the oil inlet bolt (6) is mounted on main valve seat (1).
5. according to claim 1 to a kind of High Pressure Common-Rail Fuel Inject high-pressure oil pump described in 3 any one
Assembly, which is characterized in that the fuel control mechanism is proportion magnetic valve (7), and proportion magnetic valve (7) outer wall, which is equipped with, to be located at
The second sealing ring (71) between the oil inlet end and oil outlet of proportion magnetic valve (7) and with low pressure oil pocket (10) sealing cooperation, institute
State the first low pressure oil pocket (101) and be located at ratio electromagnetism that low pressure oil pocket (10) includes the oil inlet end positioned at proportion magnetic valve (7)
Second low pressure oil pocket (102) of the oil outlet of valve (7), the first low pressure oil pocket (101) are connected to oil-inlet mechanism, and described second
Low pressure oil pocket (102) is connected to by two logical oil valve components (4) with high-voltage oil cavity (20), the oil inlet end of the proportion magnetic valve (7)
Equipped with solenoid valve strainer (72).
6. according to claim 1 to a kind of High Pressure Common-Rail Fuel Inject high-pressure oil pump described in 3 any one
Assembly, which is characterized in that the high-voltage oil cavity (20) runs through the both ends of plunger bushing (2), and one end of the plunger (3) is position
Built-in end in high-voltage oil cavity (20), plunger (3) other end are the drive connection for being pierced by plunger bushing (2) and connecting with driving mechanism
End.
7. according to claim 1 to a kind of High Pressure Common-Rail Fuel Inject high-pressure oil pump described in 3 any one
Assembly, which is characterized in that the logical oil valve component (4) of described two includes the two two logical font (41) interconnected and integrates fuel-displaced
Head (42) is equipped with connection oil pocket (421) and oil outlet chamber (422), the logical font of described two in integrated oil head (42) out
(41) be equipped with by low pressure oil pocket (10) with connect oil pocket (421) connection the first font hole (411), by connection oil pocket (421)
The second font hole (412) being connected to high-voltage oil cavity (20) and the third for being connected to high-voltage oil cavity (20) with oil outlet chamber (422)
Font hole (413), the connection oil pocket (421) is interior to be equipped with for making fuel oil from low pressure oil pocket (10) to connection oil pocket (421)
The first ball valve (43) of one-way flow is equipped in the oil outlet chamber (422) for making fuel oil from high-voltage oil cavity (20) to fuel-displaced
Second ball valve (44) of chamber (422) one-way flow.
8. a kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly according to claim 7, feature
It is, first ball valve (43) includes the first ball valve spring base (431), the first ball valve spring (432) and can be with first
The first switch ball (433) of font hole (411) sealing cooperation, the first ball valve spring (432) are located at the first ball valve spring
Between seat (431) and first switch ball (433), the second ball valve (44) includes the second ball valve spring base (441), the second ball valve spring
(442) and the second switch ball (443) cooperated, the second ball valve spring (442) can be sealed with third font hole (413)
Between the second ball valve spring base (441) and second switch ball (443), described integrated oil head (42) out are equipped with connected set
At the external oil outlet (420) with oil outlet chamber (422) of oil head out (42), the first font hole (411) and first switch ball (433) phase
The position that the position and third font hole (413) of cooperation are matched with second switch ball (443) is respectively positioned on two logical fonts (41)
The same end.
9. a kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly according to claim 2, feature
It is, the side wall of the plunger (3) is equipped with annular oil-recovery tank (30), and the oil return mechanism is hollow back leakage connection (9),
The plunger bushing (2) is equipped with third connection through-hole (22), and the main valve seat (1) is equipped with the 4th connection through-hole (12),
High-voltage oil cavity (20), third connection through-hole (22), the 4th are connected through-hole (12) and back leakage connection by the annular oil-recovery tank (30)
(9) it is sequentially communicated.
10. a kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly according to claim 3, feature
It is, the main valve seat (1) is equipped with the gas vent of connection main valve seat (1) lateral wall and low pressure oil pocket (10), the row
Mechanism of qi structure is the exhaust bolt (0) that can be sealingly mounted in gas vent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811359456.1A CN109253004A (en) | 2018-11-15 | 2018-11-15 | A kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811359456.1A CN109253004A (en) | 2018-11-15 | 2018-11-15 | A kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109253004A true CN109253004A (en) | 2019-01-22 |
Family
ID=65043529
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| CN201811359456.1A Pending CN109253004A (en) | 2018-11-15 | 2018-11-15 | A kind of High Pressure Common-Rail Fuel Inject high-pressure fuel injection pump assembly |
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| CN110529310A (en) * | 2019-09-24 | 2019-12-03 | 西华大学 | A kind of high-melting fat fatty acid methyl esters or ethyl ester oil supply system |
| CN113448318A (en) * | 2021-07-07 | 2021-09-28 | 江铃汽车股份有限公司 | Vehicle offline fault diagnosis control method |
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