CN106762604A - The fuel tank piston of fuel-injection pump - Google Patents

The fuel tank piston of fuel-injection pump Download PDF

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Publication number
CN106762604A
CN106762604A CN201710003545.1A CN201710003545A CN106762604A CN 106762604 A CN106762604 A CN 106762604A CN 201710003545 A CN201710003545 A CN 201710003545A CN 106762604 A CN106762604 A CN 106762604A
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CN
China
Prior art keywords
fuel
piston
injection pump
fuel tank
injection
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.)
Granted
Application number
CN201710003545.1A
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Chinese (zh)
Other versions
CN106762604B (en
Inventor
李寿哲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Han Kwang Seiko Co Ltd
Original Assignee
Han Kwang Seiko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
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Publication of CN106762604A publication Critical patent/CN106762604A/en
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Publication of CN106762604B publication Critical patent/CN106762604B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F02M45/00—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship
    • F02M45/02—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts
    • F02M45/04—Fuel-injection apparatus characterised by having a cyclic delivery of specific time/pressure or time/quantity relationship with each cyclic delivery being separated into two or more parts with a small initial part, e.g. initial part for partial load and initial and main part for full load
    • F02M45/06—Pumps peculiar thereto
    • F02M45/066—Having specially arranged spill port and spill contour on the piston
    • 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
    • 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
    • F02M59/025—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 a single piston
    • 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
    • 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
    • F02M59/102—Mechanical drive, e.g. tappets or cams
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/24—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke
    • F02M59/26—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders
    • F02M59/265—Varying fuel delivery in quantity or timing with constant-length-stroke pistons having variable effective portion of stroke caused by movements of pistons relative to their cylinders characterised by the arrangement or form of spill port of spill contour on the piston
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0408—Pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
    • F04B11/0075—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons connected in series
    • F04B11/0083—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons connected in series the pistons having different cross-sections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
    • F04B11/0091—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using a special shape of fluid pass, e.g. throttles, ducts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/18—Lubricating
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/04—Fuel-injection apparatus having means for avoiding effect of cavitation, e.g. erosion

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

It is an object of the present invention to the long-time for solving to have by the piston of four stroke fuel-injection pumps is reciprocating, and with high pressure carry out fuel injection characteristic and trigger fatigue, increase wear rate, and blockage problem.The present invention provides a kind of fuel tank piston of fuel-injection pump, is related to one kind to be arranged at cylinder interior, and pump and the fuel-injection pump of compressed fuel piston, the fuel tank piston of the fuel-injection pump is characterised by, including：Control edge, is formed at the upper end of piston, for regulation fuel injection amount；Piston body, positioned at the bottom at control edge, with cylinder contact and reciprocating；Neck, positioned at the centre of piston body, its diameter lentamente diminishes；And through hole, neck is formed at, and with the direction insertion piston with axle orthogonal, and direction along axle is formed parallel to multiple.

Description

The fuel tank piston of fuel-injection pump
Technical field
The present invention relates to a kind of fuel tank piston of fuel-injection pump.Being related to one kind in more detail can supply to marine engine Answer the fuel tank piston of the fuel-injection pump of fuel.
Background technology
For the engine that diesel oil is used as fuel, the effect of the fuel-injection pump of the engine is to fire Material is compressed with high pressure and is sent to be arranged at the fuel injector (Injector) of combustion chamber, therefore, it is actual that fuel is pressed The injection apparatus of submitting of contracing is made up of with cylinder plunger.
The injection apparatus, by playing the plunger (Plunger) of piston effect in the cylinder used as cylinder (Barrel) inside is reciprocating, so that, compress and send out fuel.
Fig. 1 is the sectional view of the injection apparatus of fuel-injection pump of the display based on prior art.
Reference picture 1, the injection apparatus (1) of the fuel-injection pump based on prior art, including：For being compressed to fuel or The piston (10) of uncompression, and for the cylinder (20) of the piston (10) combination.
The piston (10) is combined in mode that can be reciprocating on the internal above-below direction of the cylinder (20). The piston (10) is back and forth driven by the cam of camshaft.It is formed with the piston (10) and is connected with piston chamber (21) Compensating groove (Relief groove, not shown), and be formed with connected with compensating groove manipulation conduit (Control Lead, not Diagram).
For the cylinder (20), it is respectively formed with piston chamber (21) in its internal and outside and matches somebody with somebody grease chamber (22), and shape Connection piston chamber (21) and the cutout hole (23) with grease chamber (22) are supplied into having.Thus, when the piston (10) rises, so that From during its excircle closing cutout hole (23), start to be compressed fuel, also, when certain pressure is reached, energy The delivery valve (Delivery valve, not shown) on the piston chamber (21) top is enough opened, so that the fuel of compression passes through Fuel injector sprays.
Here, for the injection apparatus (1) of the fuel-injection pump based on prior art, when the piston (10) is moved from bottom Move during to top, because the pressure of the piston chamber (21) rises, thus, internal fuel is compressed.In this case, with The piston (10) and be moved to downside from upside to close the state of the cutout hole (23), make the piston chamber (21) internal Fuel volumetric growth, so as to form low pressure.In this condition, as the piston (10) further declines, and the opening cutout During hole (23), because the fuel with grease chamber (22) is hastily moved to the piston chamber (21), so that, trigger cavitation (Cavitation)。
Accordingly, for the injection apparatus (1) of the fuel-injection pump based on prior art, as the piston (10) is in fuel Compressive state under from upside be moved to downside so that on the basis of the upside of the piston (10), the piston chamber (21) with Pressure differential is produced between (22) with grease chamber.Therefore, for the injection apparatus (1) of the fuel-injection pump based on prior art, The cavitation produced by the pressure differential between the piston chamber (21) and (22) with grease chamber, thus, causes to corrode institute State excircle, the inner face of the cylinder (20) and the cutout hole (23) of piston (10).
Also, for the injection apparatus (1) of the fuel-injection pump based on prior art, because pressure can be leaked to by cavitating Phenomenon and the space corroded, cause the internal pressure of the piston chamber (21) to decline.Accordingly, for the fuel based on prior art The injection apparatus (1) of jet pump, not only its fuel injection efficiency reduction, and, because cavitation can corrode the cylinder (20) And cutout hole (22), there is a problem of shortening the injection apparatus life-span.
To solve the above problems, in Korean Patent Laid 10-2015-0010877, by forming oil in plunger Road, and the valve for opening and closing oil circuit is set in the upside of plunger, so that, reduce the pressure between the upside of plunger compartment and downside Difference.But, other oil circuit, and the method that the valve for supplying to be opened and closed the oil circuit is set are formed on plunger, it is excessively multiple with structure It is miscellaneous, also, increase the shortcoming of manufacture and packaging technology required time and expense too much.
【Prior art literature】
【Patent document】
(patent document 0001) Korean Patent Laid 10-2015-0010877
The content of the invention
The invention technical problem to be solved
It is an object of the present invention to solve to make past because of the long-time that the fuel tank piston of four stroke fuel-injection pumps has Multiple motion, and with high pressure carry out fuel injection characteristic and trigger fatigue, increase wear rate, and blockage problem.
It is an object of the invention to provide a kind of fuel tank piston of fuel-injection pump, by adding simple processing to piston, Thus, it is possible to cause that pressure or temperature around piston are evenly distributed with simple structure, coefficient of friction is reduced, so as to extend The accessory life-span, also, improve ejection efficiency.
The technical scheme of solve problem
The present invention provides a kind of fuel tank piston of fuel-injection pump, is related to one kind to be arranged at cylinder interior, and carries out up and down The fuel tank piston of the simultaneously fuel-injection pump of compressed fuel is moved back and forth, the fuel tank piston of the fuel-injection pump is characterised by, wrapped Include：Control edge, is formed at the upper end of piston, for regulation fuel injection amount；Piston body, positioned at the bottom at control edge, with gas Cylinder is contacted and reciprocating；Neck, positioned at the centre of piston body, its diameter lentamente diminishes；And through hole, neck is formed at, And with the direction insertion piston with axle orthogonal, and, it is formed parallel to multiple along the direction of axle.
Also, the fuel tank piston of the fuel-injection pump in another embodiment of the invention, being provided, it is characterised in that Through hole is big for the diameter of side, and tends to the coniform hole that opposite side diameter is tapered into.
And, in another embodiment of the invention, the fuel tank piston of the fuel-injection pump for being provided, it is characterised in that logical Hole be alternately the side being relatively large in diameter and the direction of less side of bellmouth and formed.
The effect of invention
The fuel tank piston of fuel-injection pump of the invention, adds simple structure so that in cylinder interior by piston Piston around temperature can be evenly distributed with pressure so that, improve wearability simultaneously prevent piston from being asked with the blocking of cylinder Topic.
Also, the fuel tank piston of fuel-injection pump provided by the present invention, is produced not by forming neck at its center The region of cylinder is contacted, coefficient of friction can be reduced, so that, improve ejection efficiency and extend the life-span of accessory.
And, the fuel tank piston of fuel-injection pump provided by the present invention, by reduce the upside in cylinder and downside it Between pressure differential, thus, it is possible to prevent the generation of cavitation.
Brief description of the drawings
Fig. 1 is the sectional view of the injection apparatus of fuel-injection pump of the display based on prior art,
Fig. 2 is the accompanying drawing of the fuel tank piston of the fuel-injection pump for showing one embodiment of the invention,
Fig. 3 is the photo that test is sprayed by nozzle carried out using the fuel-injection pump based on prior art,
Fig. 4 for carried out using the fuel-injection pump with fuel tank piston of one embodiment of the invention by nozzle spray Penetrate the photo of test.
Specific embodiment
Below, the present invention will be described in more detail referring to the drawings.
Fig. 2 is the accompanying drawing of the fuel tank piston of the fuel-injection pump for showing one embodiment of the invention.
The fuel tank piston (100) of the fuel-injection pump of one embodiment of the invention, from top to bottom includes successively：Control edge (110), positioned at topmost, fuel injection can be adjusted by the opportunity that regulation is met with the cutout hole (not shown) of cylinder Amount；Piston body (120), positioned at the lower section of control edge (110), in the state of the inner periphery with cylinder (not shown) is contacted, By moving up and down and compressed fuel；Tappet (130), positioned at bottom, contacts by with cam (not shown), and by cam (not shown) receives power.
Control edge (110) with along the circumference of fuel tank piston (100) with screw thread shape incline certain length face, because This, can adjust the opportunity met with the cutout hole (not shown) of cylinder, so as to adjust emitted dose.
Piston body (120) moves up and down in the state of being contacted with cylinder (not shown), is flowed into therefore, it is possible to compress The fuel of cylinder interior.Now, by piston body (120) center formed depression radian, and formed not with cylinder contact Region, that is, form neck (126).That is, piston body (120) includes, the upper end (122) contacted with cylinder (not shown) and lower end (124) neck (126) of the middle-end, and not in contact with cylinder.
Even if the neck (126) of middle-end is not in contact with cylinder (not shown), because of upper end (122) and lower end (124) with cylinder (not Diagram) contact, so that, do not influence to be compressed fuel.Also, because reducing the area contacted with cylinder (not shown), because This, can reduce overall coefficient of friction, improve ejection efficiency and extend the life-span of accessory.And, because neck (126) is filled with Lubricating oil, can play a part of to lubricate and cool down between piston body (120) and cylinder (not shown).
Also, the through hole (128,129) of insertion piston body (120) is formed on the neck (126) of middle-end.Through hole (128, 129) by piston (110) axle and with the axle orthogonal of piston (110).And, multiple through holes (128,129) lead to along axle Cross upper and lower configuration, when pressure differential is produced between the upper and lower part of piston body (120), the lubricating oil of (126) of neck along it is upper, The through hole (128,129) of lower configuration and flow so that, prevent cavitation.
In addition, through hole (128,129) is that one end diameter is big and other end diameter is small, the coniform hole that diameter is tapered into. When through hole (128,129) is coniform hole, the lubricating oil of filling to neck (126) is big by the diameter of through hole (128,129) Side flows into, and is discharged by the small side of diameter.It is thus preferable that multiple through holes (128,129) are formed in parallel to each other, Also, the big side of the diameter side small with diameter is replaced in the same side.In this way, by the alternately big side of diameter with it is straight The mode of the small side in footpath, enables swimmingly to be flowed in spacing of the lubricating oil between neck (126) and cylinder (not shown), Therefore, more efficiently piston is cooled down and is lubricated.
Therefore, have the advantages that to prevent because of piston blockage problem caused by frictional heat and cavitation.Also, because making profit Lubricating oil can be flowed by the through hole (128,129) of upper and lower configuration, so as to equably maintain the pressure of the upper and lower sides of cylinder interior Power, and prevent the generation of cavitation.And, because equably maintaining the temperature and pressure of cylinder interior, it is possible to increase wearability.
Fig. 3 is the photo that test is sprayed by nozzle carried out using the fuel-injection pump based on prior art, and Fig. 4 is What is carried out using the fuel-injection pump with fuel tank piston of one embodiment of the invention sprays the photo of test by nozzle.
Compare test result, compared to existing fuel-injection pump, be able to confirm that, use one embodiment of the invention In the case of fuel-injection pump with fuel tank piston, the jet performance of nozzle has obtained significant raising.

Claims (3)

1. a kind of fuel tank piston of fuel-injection pump, is related to one kind to be arranged at cylinder interior, and is pumped and pressed The piston of the fuel-injection pump of contracting fuel, the fuel tank piston of the fuel-injection pump is characterised by,
Including：
Control edge, is formed at the upper end of piston, for regulation fuel injection amount；
Piston body, positioned at the bottom at control edge, and cylinder contact and pumps；
Neck, its diameter is lentamente diminished from the both sides of piston body toward center；And
Through hole, is formed at neck, and with the direction insertion piston with axle orthogonal, multiple is formed parallel to along the direction of axle.
2. the fuel tank piston of fuel-injection pump according to claim 1, it is characterised in that
Through hole is big for the diameter of side, and tends to the coniform hole that opposite side diameter is tapered into.
3. the fuel tank piston of fuel-injection pump according to claim 2, it is characterised in that
Through hole be alternately the side being relatively large in diameter and the direction of less side of bellmouth and formed.
CN201710003545.1A 2016-03-29 2017-01-04 The fuel tank piston of fuel-injection pump Expired - Fee Related CN106762604B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020160037697A KR101682055B1 (en) 2016-03-29 2016-03-29 An oil tank piston for fuel injection pump
KR10-2016-0037697 2016-03-29

Publications (2)

Publication Number Publication Date
CN106762604A true CN106762604A (en) 2017-05-31
CN106762604B CN106762604B (en) 2018-08-07

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CN201710003545.1A Expired - Fee Related CN106762604B (en) 2016-03-29 2017-01-04 The fuel tank piston of fuel-injection pump

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JP (1) JP6497594B2 (en)
KR (1) KR101682055B1 (en)
CN (1) CN106762604B (en)
DE (1) DE102017202229A1 (en)

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CN112523909B (en) * 2020-11-30 2022-04-22 重庆红江机械有限责任公司 Isobaric injection pump of high-speed machine

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