KR101693978B1 - Common rail fuel injector and the fuel pump test apparatus of a large internal combustion engine - Google Patents

Common rail fuel injector and the fuel pump test apparatus of a large internal combustion engine Download PDF

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Publication number
KR101693978B1
KR101693978B1 KR1020150055724A KR20150055724A KR101693978B1 KR 101693978 B1 KR101693978 B1 KR 101693978B1 KR 1020150055724 A KR1020150055724 A KR 1020150055724A KR 20150055724 A KR20150055724 A KR 20150055724A KR 101693978 B1 KR101693978 B1 KR 101693978B1
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South Korea
Prior art keywords
fuel
injector
fuel pump
test
jig
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KR1020150055724A
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Korean (ko)
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KR20160125057A (en
Inventor
김진남
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주식회사 이디젤
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Priority to KR1020150055724A priority Critical patent/KR101693978B1/en
Publication of KR20160125057A publication Critical patent/KR20160125057A/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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • 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
    • F02M65/00—Testing fuel-injection apparatus, e.g. testing injection timing ; Cleaning of fuel-injection apparatus
    • F02M65/001—Measuring fuel delivery of a fuel injector
    • 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
    • F04B51/00—Testing machines, pumps, or pumping installations

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

Abstract

The present invention relates to a common rail fuel injector and a fuel pump testing apparatus for a large-sized internal combustion engine, comprising: a frame-shaped testing machine body (10); A fuel pump fixing jig 20 horizontally installed on the tester main body 10 to fix the fuel pump 1 thereto; A fuel pump driving motor 30 installed on a side surface of the fuel pump fixing jig 20 for rotationally driving the fuel pump 1; A test fuel supply part (40) for supplying the test fuel into the fuel pump (1); A common rail 50 to which test fuel is supplied at a high pressure and a low pressure by rotational drive of the fuel pump 1; An injector fixing jig 60 connected to the common rail 50 and fixing the injector 2 to the main body 10 to which a test fuel with a predetermined pressure is supplied, An injected fuel recovery unit (70) for recovering test fuel injected through the injector (2); A flow meter (80) for measuring the flow rate of the test fuel recovered in the injected fuel recovery unit (70); The operation of each of the fuel pump driving motor 30, the test fuel supply unit 40, the common rail 50 and the injector 2 is controlled and the flow rate of the test fuel is measured using the flow rate of the test fuel measured by the flow meter 80 And a controller 90 for determining whether the fuel pump 1 and the injector 2 are operating normally. With this configuration, the performance of the injector and the fuel pump can be tested at the same time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a common rail fuel injector and a fuel pump testing apparatus for a large-

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a common rail fuel injector and a fuel pump testing apparatus for a large-sized internal combustion engine, which is installed in a large-sized internal combustion engine such as a ship and maintains a common rail fuel injector and a fuel pump. To a common rail fuel injector and fuel pump test apparatus of a large-sized internal combustion engine which can easily test whether the performance of the fuel pump meets the standard.

The common rail engine refers to a method of directly injecting fuel according to the operating condition by using a compression device (compression accumulator, rail) capable of precise electronic control and a fuel injecting device with excellent responsiveness (hereinafter referred to as "injector"), Unlike conventional engines that supply fuel and air to the combustion chamber through a mixer, the common rail engine can inject the high-pressure fuel directly into the combustion chamber, so that the engine and the fuel injection function can be separately configured. .

Such common rail engines have been widely used in internal combustion engines such as diesel engines. In the case of such common rail engines, foreign substances are accumulated in injectors and fuel pumps injecting fuel at high pressure for a long period of time, There is a problem in that it is difficult to secure a normal function due to a drop in output of the engine.

Therefore, injectors and fuel pumps of common rail engines that have been used for a long time are disassembled, cleaned, and reassembled before being used. In this case, the reassembled injector and fuel pump perform the performance meeting the standards. Therefore, in the case where there is an abnormality in the function, there arises a problem such as separation and re-inspection.

In order to solve the above problems, a test apparatus for testing the performance of an injector or the like has been developed. An example of such a technique is a test apparatus and method for a common rail injector of an internal combustion engine of Patent No. 911051, A common rail injector test jig device for an internal combustion engine.

However, in the test apparatus and the test jig apparatus disclosed in the above patent documents, only the injector connected to the common rail is subjected to the test, and therefore it is difficult to test the fuel pump maintained with the injector, .

Therefore, it is required to develop a test apparatus capable of testing the performance simultaneously after repairing the injector and the fuel pump used for a long time.

KR 10-0911051 B1 KR 10-0899187 B1 KR 10-2011-0017516 A KR 10-1152570 B1 KR 10-0184432 B1 KR 10-2010-0038259 A

The present invention solves the problems of the conventional common rail fuel injector and the fuel pump testing apparatus as described above. The present invention disassembles the injector and the fuel pump, which are used for a long time and requires maintenance, The present invention provides a common rail fuel injector and fuel pump test apparatus for a large-sized internal combustion engine that can be easily tested without re-installing it in a vehicle, a ship, or the like.

It is an object of the present invention to provide a test apparatus for a common rail fuel injector and a fuel pump, A common rail to which test fuel is supplied at high pressure and low pressure by rotational drive of the fuel pump; An injector fixing jig which is connected to the common rail and fixes an injector supplied with a test fuel of a predetermined pressure into the main body; An injecting fuel recovery unit for recovering test fuel injected through the injector; A flow meter for measuring a flow rate of the test fuel recovered in the injection fuel recovery unit; By controlling the operations of the fuel pump driving motor, the test fuel supply unit, the common rail and the injector, and by using the flow rate of the test fuel measured by the flow meter, to determine whether the fuel pump and the injector are operating normally or not do.

The fuel pump fixing jig includes a jig body having a horizontally long length and a long hole formed along the length thereof; And a fixing plate installed on an upper portion of the jig body, fixedly installed with a fuel pump, and slidingly positioned along the slot to adjust the position.

Also, the injector fixing jig of the present invention comprises: a first jig having a cylindrical shape with an open top and a bottom and being inserted through a lower portion of the injector; A second jig which is fitted on the side surface of the injector and is fastened and fixed to the first jig; And a fixing plate fastened and fixed to the second jig and fixed to the main body of the testing machine.

In the meantime, the present invention can be implemented by forming a plurality of fastening holes radially on the upper surface of the first jig and a pair of coupling shafts having a downward length on the lower surface.

The injection fuel recovery unit of the present invention includes a support frame having a "C" -shaped cross-section shape having an upper surface and both side surfaces opened; A fastening plate covering an upper surface of the support frame and engaging with the injector fixing jig; A fuel recovery block installed vertically slidably between the support frame and the clamping plate for recovering test fuel injected from the injector; And a height adjusting shaft installed through the bottom surface of the support frame and supporting the bottom surface of the fuel recovery block.

In the present invention, guide holes are formed on both sides of the support frame along the vertical length, and a guide member slidingly guided by the guide holes is provided in the fuel recovery block.

It is further preferable that the fastening plate of the present invention is implemented by forming a pair of fastening protrusions formed on both sides of the fastening plate so as to protrude in a hook shape.

Disclosure of the Invention In view of the foregoing, the present invention provides a method of disassembling an injector and a fuel pump, in which foreign matter is accumulated in the interior of a vehicle or the like for a long period of time, It is possible to test whether the injector and the fuel pump exert their original performance in advance through a performance tester without mounting on a vehicle or the like.

Furthermore, since the injector and the fuel pump can be tested at the same time, it is not necessary to separately provide the injector tester and the fuel pump tester, thereby saving space and cost.

1 is a perspective view showing an example of a common rail fuel injector and a fuel pump testing apparatus of a large internal combustion engine of the present invention,
Fig. 2 is a configuration diagram of Fig. 1,
3 is a perspective view showing an example of a fuel pump fixing jig according to the present invention,
4 is an exploded perspective view showing an example of the injector fixing jig and the injected fuel recovery unit of the present invention,
5 is a perspective view showing an example of the injected fuel recovery unit of the present invention,
Figure 6 is a side view of Figure 5,
7 and 8 are use state diagrams showing an example of using the fastening plate of the jet fuel recovery unit of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The present invention relates to a large-sized internal combustion engine which can be easily tested without disassembling an injector and a fuel pump, which are used for a long period of time and requiring maintenance, to remove foreign substances accumulated in the internal combustion engine, To a common rail fuel injector and a fuel pump test apparatus.

1 and 2, a fuel pump fixing jig 20 horizontally installed on a tester main body 10 to which a fuel pump 1 is mounted and fixed is provided. A fuel pump driving motor 30 provided on the side surface of the fuel pump fixing jig 20 for rotationally driving the fuel pump 1 and a test fuel supply unit 40 for supplying the test fuel into the fuel pump 1, A common rail 50 to which the test fuel is supplied at a high pressure and a low pressure by the rotation drive of the fuel pump 1 and an injector 2 connected to the common rail 50, An injection fuel recovery unit 70 for recovering test fuel injected through the injector 2 and an injector fuel injection unit 70 for injecting the test recovered in the injected fuel recovery unit 70, A flow meter 80 for measuring the flow rate of the fuel, a fuel pump drive motor 30, a test fuel supply unit 40, A controller 90 that controls the operation of the rail 50 and the injector 2 and determines whether the fuel pump 1 and the injector 2 are operating normally using the flow rate of the test fuel measured by the flow meter 80 And a test fuel storage tank 3 in which a test fuel is stored in one side of the main body 10 can be implemented.

Further, in the present invention, the test fuel is supplied to the common rail 50 using the fuel pump 1, the flow path is configured so that the test fuel supplied to the common rail 50 is supplied to the injector 2 by a predetermined pressure Since the construction of such a passage is generally known, a detailed description thereof will be omitted in the present invention.

1, the main body 10 is formed in a rectangular box shape by connecting a plurality of frames as shown in FIG. 1. The main body 10 has a fuel pump fixing jig 20, a test fuel supply unit 40, A flow meter 50, a flow meter 80, and a controller 90 are installed.

1 and 3, the fuel pump fixing jig 20 is fixedly installed at a lower portion of the main body 10 in the left and right longitudinal direction, and the fuel pump 1 is fixedly installed. And a fuel pump 1 installed on the upper portion of the jig main body 21 and sliding along the elongated hole 21A to form a position And a fixed plate 22 to be adjusted.

The fixing plate 22 is provided with a locking portion (not shown) having a "C" cross-sectional shape into which the fuel pump 1 can be fitted and fixed. A fixing bolt 22A is provided on the locking portion, The fuel pump 1 is fixed or released while the fixing bolt 22A is tightened by the action of loosening and tightening.

The fixing plate 22 is slid along the elongated hole 21A of the jig main body 21 and moved close to the driving motor 30 positioned at one end of the jig main body 21 so that the rotation axis of the driving motor 30 The rotational force is applied to the fuel pump 1. At this time, the fixed plate 22, which is slid at this time, is fixed by a separate fixing bolt (not shown) so that its position can be firmly fixed desirable.

A drive motor 30, which replaces a power source for transmitting rotational power to the fuel pump 1 by an internal combustion engine such as a vehicle or a ship, is installed on one side of the fixed plate 22 as shown in Figs. 1 and 2, Since the drive motor 30 is selected and installed in the drive motor of various shapes and outputs, which are generally known in the art, for ease of practicing those skilled in the art, a detailed description thereof will be omitted.

The test fuel supply unit 40 provided inside the main body 10 for supplying the test fuel to the fuel pump 1 is connected to the fuel pump 1 as shown in Figs. 1 and 2, And supplies it to the fuel pump 1.

The common rail 50 provided on the upper side of the main body 10 feeds the test fuel supplied from the fuel pump 1 to the injector 2 under a constant pressure. The test common rail 50 is installed separately to simulate the actual driving environment in which the fuel pump 1 and the injector 2 are used and the fuel pump 1 and the injector 2 are separately provided. (2) can be performed under the same conditions as the actual driving environment, and as a result, the reliability of the test result is improved.

The injector fixing jig 60, which firmly fixes the injector 2 to the main body 10 so that the injector 2 connected to the flow path is supplied with the test fuel from the common rail 50 during the simulation test, A first jig 61 which is formed in an open cylindrical shape and is inserted through the lower portion of the injector 2 and an engaging groove 2A or a step formed on the side surface of the injector 2, A second jig 62 in the form of a plate having a "U" shape fixed to the jig 61 and a fixing plate 63 fastened and fixed to the second jig 62 and fixed to the tester main body 10.

At this time, a plurality of fastening holes 61A are formed radially on the upper surface of the first jig 61, and a pair of fastening holes 61B having a downward length are provided on the bottom surface of the fastening hole 61A. 2 jig 62 and the fixing plate 63 can be appropriately changed and the jet fuel recovering unit 70 described later can be easily installed and fixed by using the pair of coupling shafts 61B.

The first jig 61 is inserted into the lower end of the injector 2 and then the second jig 62 is laterally displaced by the engagement groove 2A of the injector 2 or the step, And the injector fixing jig 60 is fixed to the main body 10 by using a fixing plate 63 which is fixed to the side surface so as to prevent the injector 2 from vertically moving by being fastened and fixed to each other by using bolts or the like. The injection fuel returning unit 70 to be described later is installed on the first jig 61 and is firmly fixed so that the injection fuel returning unit 70 can be firmly fixed, Is kept in close contact with the lower nozzle portion of the injector 2, whereby the test fuel injected at the high pressure by the injector 2 is all recovered without leakage.

Is provided in close contact with the lower nozzle portion of the injector 2 by a pair of engaging shafts 61B provided in the first jig 61 of the injector fixing jig 60 so that the injected fuel recovered for recovering the injected test fuel 5 and 6, the unit 70 includes a support frame 71 having a "C" -shaped cross section and having an upper surface and both sides open, a support frame 71 covering the upper surface of the support frame 71, A fuel recovery block 73 installed vertically slidably between the support frame 71 and the clamping plate 72 to recover the test fuel injected from the injector 2, And a height adjustment shaft 74 installed to penetrate the bottom surface of the fuel recovery block 73 and supporting the bottom surface of the fuel recovery block 73.

A guide hole 71A is formed on both sides of the support frame 71 along the vertical length and a guide member B slidingly guided by the guide hole 71A is provided in the fuel recovery block 73, Even if the upper arm 73 is moved up and down, its position is not deviated from the predetermined trajectory.

The height adjustment shaft 74 is screwed through the support frame 71 so that the height of the height adjustment shaft 74 is adjusted by the screw rotation operation. The fuel returning convex 73 is lifted up and down.

The fuel recovery block 73 is positioned at the lower nozzle of the injector 2 and then the height adjustment shaft 74 is further tightened to push up the bottom face of the fuel recovery block 73, Is raised and held in close contact with the lower nozzle portion of the injector 2, thereby preventing leakage of the test fuel injected from the injector 2.

In the present invention, the injecting fuel recovery unit 70 can be easily attached to and detached from the first jig 61 of the injector fixing jig 60. For this purpose, as shown in FIG. 7, A pair of fastening protrusions 72B projecting in a hook shape are formed.

In order to fix the injector fuel recovery unit 70 to the injector fixing jig 60, first, the injector fuel recovery unit 70 having a structure as described above is provided with a pair of coupling shafts 61B protruding from the bottom surface of the first jig 61 The pair of fastening protrusions 72B are positioned at appropriate intervals so that they can be inserted laterally, and then the support frame 71 is rotated in a clockwise or counterclockwise direction as a whole, And the fixing projections 72B are fitted and fixed at the same positions on the upper and lower sides of the fuel recovery block 73. In this state, the height adjustment shaft 74 is screw-rotated as shown in FIG. 8, Whereby the pair of coupling shafts 61B and the fastening protrusions 72B come in tight contact with the fuel recovery block 73 and the lower nozzle portion of the injector 2 while the injection fuel is returned to the injector fixing jig 60 The unit 70 is firmly installed. In this process, the fuel recovery block 73 is in close contact with the lower nozzle portion of the injector 2, so that the injected test fuel does not leak to the outside and is connected to the internal flow path (not shown) And is supplied to a flow meter 80, which will be described later, through a valve 75 provided to measure the flow rate.

The flowmeter 80, in which the test fuel injected through the injecting fuel return unit 70 is recovered and removed, is used to measure the flow rate of the test fuel injected by various flow measuring apparatuses and methods which are generally performed publicly , Which can be modified by various methods and apparatuses to be more easily practiced by those skilled in the art, so that a more detailed description of the flow meter 80 is omitted.

The controller 90 installed at one side of the main body 10 controls the operations of the fuel pump driving motor 30, the test fuel supply unit 40, the common rail 50 and the injector 2, The fuel pump 1 and the injector 2 are operated normally by using the flow rate of the test fuel measured in the fuel pump 1. In the present invention, by injecting appropriate rotational power to the fuel pump 1, It is also possible to test whether the fuel is supplied at an appropriate predetermined pressure in accordance with the type of the installed internal combustion engine, for example, the type of the vehicle, the output, etc. and measure the test fuel injection amount per minute or per second set via the injector 2, Whether the fuel injection operation of the injector 2 is normal or not is determined by various methods such as measuring the injection amount of the test fuel.

The common rail fuel injector and the fuel pump test apparatus of the large internal combustion engine of the present invention configured as described above can be tested beforehand through a performance tester without mounting the cleaned and refined injector and the fuel pump to the original performance In addition, since the injector and the fuel pump can be tested at the same time, space and cost can be saved because there is no need to separately provide the injector tester and the fuel pump tester.

1: fuel pump 2: injector
2A: Coupling groove 3: Test fuel tank
10: Tester main body 20: Fuel pump fixing jig
21: jig body 21A: long hole
22: Fixing plate 22A: Fixing bolt
30: drive motor 40: test fuel supply part
50: Common rail 60: Injector fixing jig
61: first jig 61A: fastening hole
61B: coupling shaft 62: second jig
63: fixed plate 70: injected fuel recovery unit
71: Support frame 71A: Guide hole
72: fastening plate 72A: through-hole
72B: fastening protrusion 73: fuel recovery block
74: height adjustment shaft 75: valve
80: Flow meter 90: Controller
B: Guide member

Claims (7)

delete delete delete delete delete A frame-shaped testing machine body 10; A fuel pump fixing jig 20 horizontally installed on the tester main body 10 to fix the fuel pump 1 thereto; A fuel pump driving motor 30 installed on a side surface of the fuel pump fixing jig 20 for rotationally driving the fuel pump 1; A test fuel supply part (40) for supplying the test fuel into the fuel pump (1); A common rail 50 to which test fuel is supplied at a high pressure and a low pressure by rotational drive of the fuel pump 1; An injector fixing jig 60 connected to the common rail 50 and fixing the injector 2 to the main body 10 to which a test fuel with a predetermined pressure is supplied, An injected fuel recovery unit (70) for recovering test fuel injected through the injector (2); A flow meter (80) for measuring the flow rate of the test fuel recovered in the injected fuel recovery unit (70); The operation of each of the fuel pump driving motor 30, the test fuel supply unit 40, the common rail 50 and the injector 2 is controlled and the flow rate of the test fuel is measured using the flow rate of the test fuel measured by the flow meter 80 And a controller 90 for determining whether the fuel pump 1 and the injector 2 are operating normally,

The fuel pump fixing jig 20 has a horizontally long jig main body 21 having a long hole 21A formed along the length thereof; And a fixing plate 22 installed at an upper portion of the jig main body 21 to fix the fuel pump 1 and slide along the long hole 21A to adjust its position,

The injector fixing jig (60) has a first jig (61) formed in a vertically opened cylindrical shape and inserted through the lower portion of the injector (2); A second jig (62) fixed to the side surface of the injector (2) and fastened to the first jig (61); And a fixing plate 63 fastened and fixed to the second jig 62 and fixed to the main body 10 of the tester and a plurality of fastening holes 61A are formed radially on the upper surface of the first jig 61 And a pair of coupling shafts 61B having a downward length is provided on the bottom surface,

The injected fuel recovery unit (70) includes a support frame (71) having a "C" -shaped cross section whose top and both sides are open; A fastening plate 72 covering an upper surface of the support frame 71 and engaged with the injector fixing jig 60; A fuel recovery block 73 installed vertically slidably between the support frame 71 and the clamping plate 72 for recovering test fuel injected from the injector 2; And a height adjustment shaft 74 installed to penetrate through the bottom surface of the support frame 71 and supporting the bottom surface of the fuel recovery block 73. On both sides of the support frame 71, And a guide member (B) slidingly guided by the guide hole (71A) is formed in the fuel recovery block (73). The common rail fuel injector and the fuel pump test Device.
The method of claim 6,
And a pair of fastening protrusions (72B) protruding in a hook shape are formed on both sides of the fastening plate (72).
KR1020150055724A 2015-04-21 2015-04-21 Common rail fuel injector and the fuel pump test apparatus of a large internal combustion engine KR101693978B1 (en)

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KR20220142300A (en) 2021-04-14 2022-10-21 한국생산기술연구원 Performance test method for remanufactured diesel injector and high pressure fuel pump

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DE102015218102A1 (en) 2015-09-21 2017-03-23 Robert Bosch Gmbh injector
CN106894980A (en) * 2017-04-10 2017-06-27 汉正检测技术有限公司 A kind of experimental rig

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