KR20160049175A - Fuel injection pump with delivery valve of variable injection pressure - Google Patents

Fuel injection pump with delivery valve of variable injection pressure Download PDF

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Publication number
KR20160049175A
KR20160049175A KR1020140145436A KR20140145436A KR20160049175A KR 20160049175 A KR20160049175 A KR 20160049175A KR 1020140145436 A KR1020140145436 A KR 1020140145436A KR 20140145436 A KR20140145436 A KR 20140145436A KR 20160049175 A KR20160049175 A KR 20160049175A
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South Korea
Prior art keywords
pressure
fuel
fuel injection
delivery valve
hole
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KR1020140145436A
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Korean (ko)
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KR101881872B1 (en
Inventor
박득진
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현대중공업 주식회사
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Priority to KR1020140145436A priority Critical patent/KR101881872B1/en
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    • 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
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/32—Varying fuel delivery in quantity or timing fuel delivery being controlled by means of fuel-displaced auxiliary pistons, which effect injection
    • 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

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

Abstract

The present invention relates to a fuel injection pump having a delivery valve for pressure variation, so as to increase a variable pressure and an initial injection pressure at the same time. The objective of the present invention is to provide the fuel injection pump using the delivery valve for pressure variation, which can adjust an initial fuel injection pressure per engine load and an injection time with a simpler configuration and cheaper manufacturing costs than a prior fuel injection pump without an additional device to adjust the initial injection pressure, also a device to move a barrel and also without changing a shape of a plunger. According to the present invention, a fuel flowing into the barrel is pressurized by the plunger, and the pressurized fuel is transferred to a fuel discharge hole through the delivery valve for pressure variation installed to be located in the barrel and an upper cover. The delivery valve for pressure variation is configured to adjust discharge pressure of the fuel by a delivery piston, since elastic force of an elastic member elastically supporting the delivery piston is changed by a pressure adjustment part installed to be connected to the upper cover.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fuel injection pump,

The present invention relates to a fuel injection pump having a delivery valve for pressure change so as to simultaneously increase a variable pressure and an initial injection discharge pressure. The fuel injection pump adjusts an opening time of a delivery valve by a pressure regulator, To a fuel injection pump using a delivery valve for pressure change capable of increasing pressure.

Generally, the fuel injection pump used in a conventional engine requires an ignition delay due to the use of Bunker-C (HFO) which is a viscosity of different fuel, The technique of compensating the combustion delay part is generally referred to as VIT (Variable Injection Timing) technology. In practice, it means a technique of optimizing the combustion by compensating using FQS (Fuel Quality Setting).

The above-mentioned VIT or FQS is used for increasing the combustion maximum pressure in the combustion cylinder to improve the combustion efficiency while reducing the fuel consumption.

Normally, VIT is able to automatically adjust the injection timing during engine operation and to make it possible to consume the optimum fuel at low load.

Normally, the Bosch type fuel injection pump is a type in which the plunger blocks the spill port of the barrel and the pressure of the fuel starts to increase so that the high-pressure fuel is injected. At this time, The position of the spill port formed on the barrel is adjusted up or down, or the shape of the plunger is modified to suit the load.

However, as described above, the conventional VIT technique for adjusting the fuel injection timing in the related art requires a complicated device for changing the position of the spill port of the barrel, or the plunger is complicatedly changed in shape, The fuel injection timing is changed and it is difficult to adjust the fuel injection timing externally.

Registered Patent Registration No. 10-1219977 (2013.01.02)

It is an object of the present invention to provide a fuel injection device for a fuel injection control device, which is capable of controlling the initial injection pressure of an engine load without a device for controlling a separate initial injection pressure and without a device for moving a barrel, And to provide a fuel injection pump using a delivery valve for pressure change, which can control the pressure and adjust the injection timing.

In the present invention, the fuel introduced into the barrel is pressurized by the plunger, and the pressurized fuel is delivered to the fuel injection port through a pressure change delivery valve provided so as to be positioned in the barrel and the upper cover, The elasticity of the elastic member elastically supporting the delivery piston is varied by the pressure regulating portion connected to the cover so that the discharge pressure of the fuel by the delivery piston is controlled.

The fuel injection pump having a delivery valve for variable pressure according to the present invention adjusts the height of the rotation guide bar by the rotation of the pressure adjusting rotary bar to vary the elastic force of the elastic member with respect to the delivery piston, The fuel injection timing of the fuel injection pump can be delayed or advanced because the delay time of the fuel cam can be seen.

The present invention has no separate injection initial pressure regulating device and there is no apparatus for moving the barrel, and it is possible to complete combustion with a simpler structure and lower manufacturing cost than the conventional general fuel injection pump without changing the shape of the plunger, It is possible not only to achieve reduction effect but also to increase combustion rate by increasing fuel injection pressure and to reduce the generation of harmful NOx by controlling fuel injection timing for each engine rod and smog which is harmful gas can be reduced to reduce environmental pollution There are many effects such as can.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exemplary diagram showing the configuration of a fuel injection pump according to the present invention; Fig.
FIG. 2 is an exemplary view showing an operating relationship of the pressure regulator according to the present invention. FIG.
FIG. 3 is a graph showing a fuel injection rate variable graph according to a change in variable pressure and opening pressure according to the present invention. FIG.

FIG. 1 is an exemplary view showing the configuration of a fuel injection pump according to the present invention, FIG. 2 is an exemplary view showing an operation of a pressure regulator according to the present invention, FIG. 3 is a graph showing the relationship between a variable pressure and an opening pressure FIG. 2 is a graph showing a fuel injection rate variable graph according to a change in pressure; FIG.

In the present invention, the fuel introduced into the barrel (10) is pressurized by the plunger (30)

The pressurized fuel is delivered to the fuel injection port 70 through the pressure change delivery valve 50 installed to be positioned in the barrel 10 and the upper cover 40,

The elasticity of the elastic member 53 supporting the delivery piston 51 is varied by the pressure regulating portion 54 connected to the upper cover 40 so that the pressure of the delivery piston 51, So that the discharge pressure of the fuel is controlled.

That is, the present invention includes a plunger insertion hole 11 and a tubular body 10 having a plunger 30 slidably installed in the plunger insertion hole 11, An upper cover 40 fixed to the housing 30 and having a variable pressure chamber 41 therein and a pressure change chamber 41 connected to the variable pressure chamber 41 of the upper cover to be connected to the barrel 10, And a delivery valve (50)

The pressure change delivery valve 50 includes a main fuel pressure hole 13 inserted into the delivery valve hole 12 formed in the barrel 10 and connected to the delivery valve hole 12 and the plunger insertion hole 11, A rotation guide bar 52 which is located on the upper side of the delivery piston 51 and whose outer side is screwed to the screw hole 44 of the upper cover 40, An elastic member 53 provided in the variable pressure chamber 41 so as to be positioned between the rotary guide bar 52 and the rotary guide bar 52 and an elastic member 53 provided in the upper cover 40 to be connected to the rotary guide bar 52, And a pressure regulating section 54 for rotationally moving the rotation guide bar 52 in the vertical direction in the hole 44.

The barrel 10 includes a plunger insertion hole 11 into which the plunger 30 is inserted, a main fuel pressure hole 13 formed to communicate with the plunger insertion hole 11, A delivery valve hole 12 communicating with the plunger insertion hole 11 and having a delivery piston 51 inserted therein is formed.

The main fuel pressure hole 13 transmits the pressure of the fuel to the delivery piston 51 so that when the delivery piston 30 compresses the elastic member 53 by the pressure of the fuel, The plunger insertion hole 11 and the delivery valve hole 12 are communicated with each other by the main fuel pressure hole 13 so that the compressed fuel in the plunger insertion hole 11 passes through the main fuel pressure hole 13, And is transported into the hole 12.

The function of the barrel 10 and the plunger 30 is well known in the art, so that the plunger 30 can be used as a plunger, A detailed description thereof will be omitted.

The upper cover 40 includes a variable pressure chamber 41 fixed to the pump housing 20 and communicating with the delivery valve hole 12 and communicating with the variable pressure chamber 41 And a pressure regulating portion 54 for regulating the discharge pressure of the delivery piston 51 is provided in the variable pressure chamber 41 Connection is established. That is, the variable pressure chamber 41 is formed to communicate with the delivery valve hole 12.

The delivery piston 51 is elastically supported by the elastic member 53 to prevent the fuel from flowing backward when the pressure of the fuel is lowered at the end of the delivery operation and delivery of the fuel fed from the plunger 30, So as to be positioned in the delivery valve hole 12 of the barrel.

The rotation guide bar 52 is screwed to one side of the screw hole 44 communicating with the variable pressure chamber 41 of the upper cover so as to be movable up and down, And a polygonal engaging groove 52a is formed in the upper end of the pressure regulating part 54 to be inserted and engaged. The polygonal coupling groove 52a has a predetermined depth and is formed with a polygonal shape such as a triangular shape, a square shape, a pentagon, a hexagon, an octagon, and the like.

The rotation guide bar 52 configured as described above is screwed into the screw hole 44 of the upper cover to rotate and is inserted into the polygonal coupling groove 52a, The rotary shaft 50 is rotated together with the pressure adjusting portion 54 to be moved up and down along the thread of the screw hole 44. [

The elastic member 53 is installed between the rotation guide bar 52 and the delivery piston 51 to elastically support the upper end of the delivery piston 51 with respect to the rotation guide bar 52. At this time, the elastic member 53 may use an elastic spring.

The pressure regulating part 54 adjusts the elastic force of the elastic member 53 by moving the rotation guide bar 52 in the screw engagement hole 44 by rotating the rotary guide bar 52 to adjust the discharge pressure of the delivery piston 51 And the lower end is inserted into the polygonal engaging groove 52a of the rotation guide bar 52 through the close contact plug 55. The contact plug 55 is inserted into the upper cover 40, A rotary part 57 connected to the pressure regulating rotary bar 56 and connected to the upper end of the pressure regulating rotary bar 56 exposed to the outside of the contact plug 55 to rotate the pressure regulating bar 56, And a fixing nut 58 fastened to the upper end of the pressure-adjusting rotary bar 56 so as to be brought into close contact with the rotary part 57.

The tightening plug 55 is fixedly inserted into the plug hole 42 of the upper cover 40 and fixed to and supported by the upper cover 40 and the barrel 10, As shown in Fig. At this time, a sealing ring 43 is further provided between the close contact plug 55 and the plug hole 42.

A leakage oil outlet 60 is further formed in the close contact plug 55 and the upper cover 40 so that the flow oil introduced into the pressure regulator 54 is discharged to the outside.

The pressure regulating rotation bar 56 includes a lower coupling base 56a inserted into the polygonal coupling groove 52a of the rotation guide bar 52 and a lower coupling base 56a integrally connected to the lower coupling base 56a, An upper coupling portion 56c formed to be positioned on the upper side of the intermittent support rod 56b and fitted to the rotary portion 57 and an upper coupling portion 56c fitted to the upper coupling portion 56c, And is fastened integrally with the close contact plug 55 and the rotation part 57 by fastening of the fixing nut 58. The fastening part 56d is formed to be positioned on the upper side and fastened with the fastening nut 58. [

The lower coupling base 56a has a polygonal shape corresponding to the polygonal coupling groove 52a of the rotation guide bar. That is, the lower coupling base 56a is formed of a polygonal column so as to correspond to the polygonal coupling groove 52a. At this time, the lower coupling base 56a is formed to have a larger volume than the intermediate supporting rod 56b so as not to be inserted into the contact plug 55. [

The lower coupling base 56a formed as described above is interrupted (not integrally coupled) with the rotation guide bar 52 so that when the rotation of the pressure adjustment rotary bar 56 is applied to the rotation guide bar 52, The rotational force of the pressure adjusting rotary bar 56 continues to be transmitted to the rotary guide bar 52 even if the rotary guide bar 52 is moved up and down along the thread in the screw hole 44 by rotation .

The lower support rod 56a is integrally connected to the lower support rod 56b and the upper end support rod 56c is coupled to the upper rotary shaft 57. The upper end support rod 56c . A sealing ring 59 is further provided between the intermittent support rod 56b and the close contact plug 55. [

The upper coupling portion 56c is coupled to the rotary portion 57 to transmit the rotary force of the rotary portion to the pressure regulating rotary bar 56. The upper coupling portion 56c may be a columnar type such as a square, And is fitted into the rotation part 57. [

The pressure regulating rotation bar 56 constructed as described above is supported by the close contact plug 55 by the lower end coupling band 56a and the fixing nut 58. [

The rotation part 57 rotates the pressure regulating rotation bar 56 to move the rotation guide bar 52 up and down. The rotation part 57 includes a flange 57a to which the upper joining piece 56c of the pressure regulating rotation bar is fitted, A ratchet 57b connected to the plug 55 for fixing the position of the flange 57a and a flange fixing portion 57c for fixing the flange 57a to the tightening plug 55. The flange fixing portion 57c uses a known bolt nut or the like.

The ratchet 57b includes a spring 57d inserted into the ball groove 55a of the tightening plug so as to be positioned between the flange 57a and the close contact plug 55 and a spring 57d supported by the spring 57d, When the rotary part 57 is driven to rotate, that is, when the flange 57a is rotationally driven after the fixing nut 58 is loosened, the flange 57a formed on the lower surface of the flange 57a The ball 57e is seated in the ball seating grooves 57f and the position of the flange 57a is fixed.

At this time, the ball grooves 55a are formed in the contact plugs 55 so that twelve ball grooves 55a are spaced at an interval of 30 degrees around the central point o of the flange.

The rotating portion 57 configured as described above has a fixed amount of rotation of the flange 57a by a ratchet 57b provided at an equal angle. The rotating portion 57 is rotated by the flange fixing portion 57c during the operation (operation) of the fuel injection pump, As shown in Fig.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is an exemplary view showing the configuration of a fuel injection pump according to the present invention, FIG. 2 is an exemplary view showing an operation of a pressure regulator according to the present invention, FIG. 3 is a graph showing the relationship between a variable pressure and an opening pressure FIG. 2 is a graph showing a fuel injection rate variable graph according to a change in pressure; FIG.

The pressure regulator of the fuel injection pump having the variable pressure chamber according to the present invention controls the plunger 12 installed in the barrel 11 through the pre-stroke spill hole 111 while the plunger 12 is lifted , The fuel injected into the barrel 11 is pressurized by the plunger 12,

At the same time, the pressurized fuel in the barrel 11 presses the delivery piston 30 according to the present invention through the main fuel pressurizing hole 142, and the pressure of the fuel delivered to the delivery piston 30 in the delivery valve The compressed fuel flows into the delivery valve hole and the variable pressure chamber through the lower step of the lower cover 13, that is, within the delivery valve hole, and is discharged through the fuel outlet 15.

At this time, since the timing at which the delivery piston 143 is opened is related to the force of the elastic member 20, the timing of discharge of the compressed fuel is adjusted by the strength of the elastic member force, and the fuel injection timing is also controlled.

That is, in order to increase the discharge pressure of the fuel injection device, when the rotation guide bar 22 is lowered by rotating the pressure adjusting bar of the pressure adjusting part 144 by the rotation part, the elastic member 22 is rotated by the rotation guide bar, The discharge pressure of the delivery piston 30 is increased. When the rotation guide bar 22 is raised by rotating the pressure adjusting bar 144a by the rotation unit, the elastic member 22 is expanded and the discharge pressure of the delivery piston 143 is lowered.

The operation of the rotating portion 57 is performed by releasing the locking of the flange by the flange fixing portion so that the flange is rotatable and releasing the fixing nut 58 so that the rotation of the flange 57a and the pressure adjusting rotary bar 56 is free The flange 57a is rotated to rotate the pressure adjusting rotary bar 56 at a predetermined angle. At this time, the rotation of the flange 57a is performed manually.

The flange 57a is fixed to the tightening plug 55 by the flange fixing portion 57c when the rotation portion 57 is not used and the pressure adjusting rotary bar 56 is fixed to the flange 57a And the tightening plug 55 as shown in Fig.

As described above, according to the fuel injection pump having the delivery valve for pressure change according to the present invention, the discharge timing of the delivery piston 143 is controlled by adjusting the height of the pressure adjusting bar of the pressure regulating part, To the fuel injection valve (not shown) to adjust the fuel injection timing. At this time, the excessive pressure due to the pulsation of the fuel injection valve is filtered by the constant valve 80.

3, the discharge pressure can be increased or decreased and the delay effect of the fuel cam can be seen. Therefore, the fuel injection timing of the fuel injection pump can be delayed You can advance. Figure 3 (a) shows the difference in opening pressure between the blue and red discharge pressure controls.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(10): Barrel (11): Plunger insertion hole
(12): Delivery valve hole (13): Main fuel pressure hole
(20): pump housing (30): plunger
(40): upper cover (41): variable pressure chamber
(42): Plug hole (43): Sealing ring
(50): pressure change delivery valve (51): delivery piston
(52): rotation guide bar (53): elastic member
(54): pressure regulating portion (55): close contact plug
(56): pressure regulating rotation bar (56a): bottom coupling
(56b): an intermittent support rod (56c)
(56d): fastening part (57): rotating part
(57a): flange (57b): ratchet
(57c): flange fixing portion (58): fixing nut
(59): sealing ring (60): leak oil outlet
(70): fuel oil outlet (80): constant valve

Claims (7)

The fuel introduced into the barrel 10 is pressurized by the plunger 30,
The pressurized fuel is delivered to the fuel injection port 70 through the pressure change delivery valve 50 installed to be positioned in the barrel 10 and the upper cover 40,
The elasticity of the elastic member for supporting the delivery piston 51 is varied by the pressure regulating portion 54 connected to the upper cover 40 so that the fuel supplied to the delivery piston 51 And the discharge pressure of the fuel injection pump is controlled.
The method of claim 1,
In the fuel injection pump using the pressure change delivery valve,
The plunger insertion hole 11 is inserted into the pump housing 20,
A plunger 30 slidably installed in the plug insertion hole 11,
An upper cover 40 fixed to the pump housing 30 and having a variable pressure chamber 41 therein,
And a pressure change delivery valve (50) connected to the variable pressure chamber (41) of the upper cover to be connected to the barrel (10)
The pressure-change delivery valve (50)
A delivery piston 51 inserted into the delivery valve hole 12 formed in the barrel 10 and opening and closing the main fuel pressure hole 13 connecting the delivery valve hole 12 and the plunger insertion hole 11,
A rotation guide bar 52 that is positioned on the upper side of the delivery piston 51 and is screwed outside to the screw hole 44 of the upper cover 40,
An elastic member 53 provided in the variable pressure chamber 41 so as to be positioned between the delivery piston 51 and the rotation guide bar 52,
And a pressure regulating part 54 installed on the upper cover 40 to be connected to the rotation guide bar 52 and rotating the rotation guide bar 52 in the vertical direction within the screw connection hole 44 Wherein the fuel injection pump is a fuel injection pump.
The method of claim 1,
The barrel 10 includes a plunger insertion hole 11 into which the plunger 30 is inserted, a main fuel pressure hole 13 formed to communicate with the plunger insertion hole 11, And a delivery valve hole (12) communicating with the plunger insertion hole (11) and having a delivery piston (51) inserted therein is formed in the fuel injection pump.
The method of claim 1,
The upper cover 40 is fixed to the pump housing 20 and has a variable pressure chamber 41 formed therein so as to communicate with the delivery valve hole 12. The variable pressure chamber 41 is provided with a delivery piston And a pressure regulating unit (54) for regulating the discharge pressure of the fuel injection pump (51).
The method of claim 4,
The pressure regulator 54 includes a contact plug 55 to which the lower end is inserted and fixed to the upper cover 40 and a lower end of the pressure regulating part 54 which passes through the contact plug 55, A pressure regulating rotation bar 56 inserted and connected to the pressure regulating bar 56a and a pressure regulating bar 56a inserted into the upper end of the pressure regulating rotation bar 56 exposed to the outside of the contact plug 55, 57) and a fixing nut (58) fastened to the upper end of the pressure regulating rotation bar (56) so as to be brought into close contact with the rotating part (57).
The method of claim 5,
The pressure regulating rotation bar 56 includes a lower coupling base 56a inserted into the polygonal coupling groove 52a of the rotation guide bar 52 and a lower coupling base 56a integrally connected to the lower coupling base 56a, An upper coupling portion 56c formed to be positioned on the upper side of the intermittent support rod 56b and fitted to the rotary portion 57 and an upper coupling portion 56c fitted to the upper coupling portion 56c, And a fastening portion 56d which is formed to be positioned on the upper side and to which the fixing nut 58 is fastened so as to be integrally coupled to the fastening plug 55 and the rotary portion 57 by fastening the fastening nut 58 A fuel injection pump using a pressure change delivery valve.
The method of claim 5, further comprising:
The rotating part 57 includes a flange 57a to which the upper coupling rod 56c of the pressure adjusting rotary bar is fitted and a plurality of ratchet teeth 57a that are connected to the tightening plug 55 and fix the position of the flange 57a And a flange fixing portion (57c) for fixing the flange (57a) to the close contact plug (55).
KR1020140145436A 2014-10-24 2014-10-24 Fuel injection pump with delivery valve of variable injection pressure KR101881872B1 (en)

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KR1020140145436A KR101881872B1 (en) 2014-10-24 2014-10-24 Fuel injection pump with delivery valve of variable injection pressure

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KR20160049175A true KR20160049175A (en) 2016-05-09
KR101881872B1 KR101881872B1 (en) 2018-07-26

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190016680A (en) * 2017-08-09 2019-02-19 (주)동성정밀엘엑스 Oil Leak Tester for Amateur

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963362A (en) * 1982-10-05 1984-04-11 Mitsubishi Heavy Ind Ltd Fuel injection pump
JPH11343944A (en) * 1998-06-03 1999-12-14 Denso Corp Fuel injection pump for internal conbustion engine
JP2001115920A (en) * 1999-10-14 2001-04-27 Yanmar Diesel Engine Co Ltd Distribution type fuel injection pump
KR20120040879A (en) * 2010-10-20 2012-04-30 현대중공업 주식회사 Fuel injection pump with variable injection pressure chamber
KR101219977B1 (en) 2011-04-29 2013-01-09 현대중공업 주식회사 Fuel injection pump with Variable Injection Pressure chamber controled by Two phase of oil cylinder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5963362A (en) * 1982-10-05 1984-04-11 Mitsubishi Heavy Ind Ltd Fuel injection pump
JPH11343944A (en) * 1998-06-03 1999-12-14 Denso Corp Fuel injection pump for internal conbustion engine
JP2001115920A (en) * 1999-10-14 2001-04-27 Yanmar Diesel Engine Co Ltd Distribution type fuel injection pump
KR20120040879A (en) * 2010-10-20 2012-04-30 현대중공업 주식회사 Fuel injection pump with variable injection pressure chamber
KR101219977B1 (en) 2011-04-29 2013-01-09 현대중공업 주식회사 Fuel injection pump with Variable Injection Pressure chamber controled by Two phase of oil cylinder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190016680A (en) * 2017-08-09 2019-02-19 (주)동성정밀엘엑스 Oil Leak Tester for Amateur

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