KR101834327B1 - Air gap ring thickness measurement apparatus of injector and measurement method using that - Google Patents

Air gap ring thickness measurement apparatus of injector and measurement method using that Download PDF

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Publication number
KR101834327B1
KR101834327B1 KR1020150159451A KR20150159451A KR101834327B1 KR 101834327 B1 KR101834327 B1 KR 101834327B1 KR 1020150159451 A KR1020150159451 A KR 1020150159451A KR 20150159451 A KR20150159451 A KR 20150159451A KR 101834327 B1 KR101834327 B1 KR 101834327B1
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South Korea
Prior art keywords
plate
air gap
measurement
measuring
gap core
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KR1020150159451A
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Korean (ko)
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KR20170056170A (en
Inventor
서해수
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카디브(주)
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
    • G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/168—Assembling; Disassembling; Manufacturing; Adjusting
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/22—Feeler-pin gauges, e.g. dial gauges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/22—Feeler-pin gauges, e.g. dial gauges
    • G01B3/28—Depth gauges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/0025—Measuring of vehicle parts

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)

Abstract

The present invention relates to a hydraulic control apparatus for an internal combustion engine which includes a main body frame 2, a body 4 fixedly installed on the main body frame 2, a hydraulic cylinder 10 for generating a vertical driving force through the body 4, A measuring plate 14 installed at an end of the operating shaft 12 and a measuring plate 14 located at an upper portion of the body 4 so as to be movable up and down by a cylinder 10, And a measurement gauge 16 provided with a measurement pin 18 that can be received inwardly in contact with each other as the air gap core A is lifted up and the air gap core A is positioned above the measurement plate 14 The entire measurement of the air gap core A is performed at one time and the average thickness is measured by calculating the degree of pushing of the measurement pin 14 into the measurement gauge 16 by the rising of the measurement plate 14 in the hydraulic cylinder 10 ) And the measurement gauge (16), the thickness of the air gap core (A) can be measured automatically It is easy to measure the average value of the entire thickness at one time instead of only measuring the specific position of the air gap core A. There is an effect that the accuracy of the measurement result is increased.

Description

Technical Field [0001] The present invention relates to an apparatus for measuring an air gap thickness of an injector,

The present invention relates to an apparatus for measuring an air gap thickness of an injector capable of easily and accurately measuring the thickness of an air gap core, which is an essential component of an injector for injecting fuel into an automobile engine, and a measurement method thereof.

Generally, the vehicle engine is equipped with a plurality of injectors for controlling the injection amount of fuel.

The injector is brought into close contact with the cylinder head side to inject fuel at a high fuel pressure and the fuel injection quantity can be precisely controlled so that an accurate amount can be injected into the cylinder so that the fuel economy of the vehicle can be improved.

The injector injects the fuel as a fuel injection nozzle as well as injects fuel in the form of mist so that the fuel mixes well with the air. Inside the injector, a round air gap core that determines the injection amount of the injector is installed.

Although the air gap core is a small component of the injector, the thickness of the air gap core is closely related to the amount of fuel injected, and the amount of fuel injected into the cylinder varies depending on the error of the fine thickness. to be.

Therefore, in order to replace the air gap core during the repair of the injector, the thickness is firstly measured to confirm the proper thickness, and then the air gap core is replaced. In the past, the thickness of the air gap core was measured by a measuring device such as vernier calipers or micrometer Is used.

However, these conventional measuring apparatuses have difficulty in measuring the entire thickness of the air gap core or measuring the thickness of the air gap core, which is difficult for the operator to accurately measure the thickness of the air gap core. In this case, There is no problem.

Domestic Utility Model Registration No. 0227221 "Digital vernier caliper" Korean Patent No. 1172581 "Micrometer with an adjustable length anvil"

SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems described above and to provide a measuring apparatus and a measuring method thereof that can more easily and precisely measure the thickness of an injector gap.

A body 4 fixedly installed on the body frame 2; a measurement plate 14 mounted on the body frame 2 and lifted up and down; And a measuring gauge 16 provided on the upper part of the measuring plate 14 and having a measuring pin 18 abutting against the rising measuring plate 14 and received inward, The body 4 is coupled to an end of an actuating shaft 12 connected to a hydraulic cylinder 10 provided in the body frame 2 and is interlocked with the hydraulic cylinder 10, And a lower plate 8 fixed to the body frame 2 and capable of being lifted and lowered through the operating shaft 12. The upper plate 6 and the lower plate 8 are fixed to the upper surface of the operation shaft 12 The measuring gauge 16 is formed to be spaced apart from the working space in which the measuring plate 14 installed at the end is movable, A button portion 22 for elevating the measuring plate 14 and adjusting the zero point without placing the measuring plate 14 on the measuring plate 14 and a screen display portion 20 for indicating the thickness of the measured air gap core A, The degree to which the measuring pin 18 is pushed into the measuring gauge 16 by the rise of the measuring plate 14 by driving the hydraulic cylinder 10 while the air gap core A is positioned on the top of the measuring gauge 14 The pressure of the hydraulic cylinder 10 for measuring the average thickness of the air gap core A located at the upper portion of the measuring plate 14 is calculated by calculating the pressure difference between the clearance between the lower plate 8 and the operating shaft 12 Is 35 to 45 kgf / cm < 2 > at which the upper plate (6) and the lowest thickness layer (T2) portion of the air gap core (A) Air gap thickness measuring device.
Further, the measuring plate 14 is formed to have a diameter larger than the diameter of the air gap core A in order to measure the average thickness of the entire air gap core A at one time.
In the method of measuring the air gap thickness of the injector using the air gap thickness measuring device of the inductor, the air gap thickness A is measured by driving the hydraulic cylinder 10 in a state where the air gap core A is not placed on the measuring plate 14 Adjusting the zero point of the measuring gauge 16 while the measuring plate 14 connected to the upper plate 6 is in contact with the upper plate 6 and adjusting the zero point of the measuring gauge 16, Placing the air gap core A on the upper part of the measuring plate 14 with the measuring plate 14 lowered and moving the measuring plate 14 upward by means of the hydraulic cylinder 10, Of the entire air gap core (A) through the screen display portion 20 of the measurement gauge 16 in a state in which the rim of the air gap core A located on the upper part of the measurement plate 14 is completely in close contact with the upper plate 6. [ And measuring an average thickness.

delete

The thickness of the air gap core can be measured automatically by using a hydraulic cylinder and a measuring gauge to measure the thickness of the air gap core for replacement of the injector during repair of the injector. But the accuracy of the measurement result is increased by measuring the average value of the entire thickness at once.

FIG. 1 is a perspective view of an apparatus for measuring an air gap thickness of an injector according to an embodiment of the present invention. FIG.
Fig. 2 is a cross-sectional view of Fig. 1,
3 is an operation diagram of an apparatus for measuring an air gap thickness of an injector according to an embodiment of the present invention.
4A to 4B are views for explaining a method of measuring an average thickness of an air gap core of an injector according to an embodiment of the present invention,
5 is a flowchart illustrating a method of measuring an air gap thickness of an injector according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a perspective view of an apparatus for measuring an air gap thickness of an injector according to an embodiment of the present invention, and FIG. 2 is a sectional view thereof.

The apparatus for measuring thickness A of an air gap core (A) according to the present invention comprises a body frame 2, a body 4 fixedly mounted on the body frame 2, a hydraulic cylinder 10 for generating a vertical driving force, An operation shaft 12 which is vertically moved up and down by the hydraulic cylinder 10, a measurement plate 14 installed at an end of the operation shaft 12, And a measurement gauge 16 for measuring the thickness of the air gap core A by means of a measurement pin 18 provided so as to be able to be received inside the body 4 in contact with each other in accordance with the rising operation of the measurement plate 14, do.

The body 4 is composed of a body frame 2 and a lower plate 8 to be installed and a top plate 6 to which a measurement gauge 16 is installed. It is preferable that the air gap thickness measuring apparatus 100 of the present invention is installed to be able to maintain the horizontal position.

A hydraulic cylinder 10 is installed in the lower portion of the lower plate 8 through the body frame 2. The upper plate 6 and the lower plate 8 are capable of moving the operating shaft 12 of the hydraulic cylinder 10 It is installed apart from the working space.

The measuring plate 14 is moved up and down integrally with the operating shaft 12 by the up and down linear driving force generated by the hydraulic cylinder 10 and the measuring plate 14 To the top plate 6 of the body 4 and come into contact with each other.

The measuring pin 18 of the measuring gauge 16 is inserted through one side of the upper plate 6 of the body 4 and the measuring pin 18 is pushed by the contact with the measuring plate 14, When the plate 14 descends, it is provided with an elastic force so that it can be placed at its original position again.

The measurement pin 18 is passed through the top plate 6 and the measurement pin 18 is moved to the upper side of the measurement gauge 16 as the measurement plate 14 is contacted with the measurement pin 18 protruding to the lower portion of the upper plate 6. [ And the thickness of the air gap core (A) is measured.

First, as shown in FIG. 3A, the upper part of the measuring plate 14 is lifted up with nothing raised, and the measuring pin 18 is fully pushed in. (16). That is, the state in which the measuring pin 14 is completely pushed into the inside of the top plate 6 by the measuring plate 14 is the zero point adjustment.

The air gap center A to be measured is positioned on the upper side of the measuring plate 14 as shown in FIG. 3B while the zero point of the measuring gauge 16 is adjusted. Then, the measuring plate 14 is elevated by the hydraulic cylinder 10 The upper plate 6 and the measurement plate 14 are separated from each other by the thickness of the air gap core A as shown in FIG. 3C.

At this time, in order to measure the average thickness of the entire air gap core A at one time, it is preferable to make the size of the measurement plate 14 larger than the air gap core A.

The air gap core (A) of the present invention is in the form of an annular ring having a rim at its center, so that the whole rim lies between the top plate (6) and the measuring plate (14) (18) is brought into contact with the measuring plate (14).

That is, the measurement pin 18 is pushed less than the distance between the top plate 6 and the measurement plate 14 by the thickness of the air gap core A when the zero point is adjusted, and the measurement pin 18 is completely pushed The thickness of the air gap core A is measured by calculating a distance difference in which only a part of the measurement pin 18 is pushed in a state where the zero point is adjusted.

The calculated thickness of the air gap core A is displayed to the operator through the screen display unit 20 located on the front surface of the measurement gauge 16. [

In the present invention, a hydraulic cylinder 10 having a pressure of 35 to 45 kgf / cm 2 can be used to increase the accuracy of measurement of the thickness of the air gap core A by the hydraulic cylinder 10.

The air gap center (A) of the ring type may have an error when measuring only a thick thickness of one side or simply measuring with a small force when a specific region of the rim is thick or thin due to a minute difference, May be an error of about 1/100 to 1/1000. However, even such a small error may lead to a difference in fuel injection quantity of the injector, resulting in defective products.

Further, in the case where the air gap core A is finely bent, an error in the thickness becomes greater when the force is applied with a small force.

According to the present invention, by making the pressure of the hydraulic cylinder 10 to be 35 to 45 kgf / cm 2, it is possible to measure the average thickness of the air gap core A by pushing the entirety with a constant pressure even if the thickness of the specific position is different .

The average thickness of the air gap core A is measured with reference to Figs. 4A to 4B. In the state in which the air gap core A is placed on the upper part of the measurement plate 14, The portion of the highest thickness layer T1 of the air gap core A contacts the lower surface of the upper plate 6 as shown in FIG. 4A and the thickness is displayed through the measurement gauge 16 as shown in FIG.

In this state, when the measuring plate 14 further moves upward due to the pressure of the hydraulic cylinder 10, the operating shaft 12 is finely moved by the clearance between the lower plate 8 and the operating shaft 12 as shown in FIG. The measuring plate 14 is no longer moved upward due to secondary contact between the top plate 6 and the lowest thickness layer T2 of the air gap core A while being inclined.

As the operating shaft 12 is tilted, the measuring plate 14 is also tilted finely and the contact pin 18 abutting the upper portion of the measuring plate 14 is also pushed upward. At this time, The average thickness of the air gap core A is obtained.

If the pressure of the hydraulic cylinder 10 does not reach the lower limit value, an error in measuring the thickness of the air gap core A occurs as described above. If the pressure exceeds the upper limit value, the pressure of the hydraulic cylinder 10 becomes too high, The device 100 may be subjected to an excessive force to cause a failure, and the shape of the air gap core A may also be deformed.

Hereinafter, a method of measuring an air gap thickness of an injector according to an embodiment of the present invention will be described with reference to FIG.

In the present invention, the zero point of the measurement gauge 16 is adjusted before the thickness of the air gap core A is measured.

The upper plate 6 is lifted up with nothing mounted on the measuring plate 14 provided at the end of the operating shaft 12 which is raised and lowered by the hydraulic cylinder 10.

The measurement pin 14 is provided on the top plate 6 so as to protrude from one side of the measurement gauge 16 so as to pass through the top plate 6, And the zero point of the measurement gauge 16 is adjusted by pressing the button portion 22 while the measurement pin 18 is fully pushed into the upper portion of the top plate 6. [ The zero point adjustment of the measurement gauge 16 is set before the initial measurement. When foreign substances are deposited on the upper surface of the measurement plate 14, it is preferable to remove and reset the foreign matter for the accuracy of measurement.

The use after adjusting the zero point of the measurement gauge 16 is intended to reduce the defect rate due to a minute error, thereby preventing an error of the measuring device.

When the measuring plate 14 is lowered by the hydraulic cylinder 10 after adjusting the zero point of the measuring gauge 16, the measuring pin 18 is projected downwardly again under the top plate 6 by the elastic force, The protruding distance of the pin 18 is displayed on the screen display unit 20 of the measurement gauge 16.

When the measuring plate 14 is lifted by the hydraulic cylinder 10 while the air gap core A to be measured is raised on the lower part of the lower measuring plate 14, A distance between the plate 6 and the measuring plate 14 is generated so that a part of the measuring pin 18 abutting the measuring plate 14 through the center of the air gap core A is pushed.

The measuring gauge 16 is a part of the measuring pin 18 that is pushed in completely by the zero point adjustment so that a part of the measuring pin 18 is pushed in and protruded to the outside becomes the thickness of the air gap core A. The thickness measurement value is displayed on the screen display unit 20 and the operator confirms the thickness measurement value.

Reference numeral 24 denotes an operation unit.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of claims and equivalents thereof.

(2) body frame (4) body
(6) - top plate (8) - bottom plate
(10) - hydraulic cylinder (12) - operating shaft
(14) - Measuring Plate (16) - Measuring Gauge
(18) - measuring pin (20) - on-screen display
(22) - button portion (24) - operating portion
(100) - Air gauge thickness measuring device
(A) - Air Gangsim

Claims (7)

A body frame 2,
A body 4 fixed to the upper portion of the main body frame 2,
A measurement plate 14 mounted on the body frame 2 and lifted up and down,
And a measurement gauge 16 installed on the upper part of the body 4 and having a measuring pin 18 abutting against the ascending measuring plate 14 and received inward,
The measuring plate 14 is coupled to an end of an actuating shaft 12 connected to a hydraulic cylinder 10 provided in the main frame 2 to be elevated in conjunction with the hydraulic cylinder 10,
The body 4 includes a top plate 6 on which a measurement gauge 16 is installed and a bottom plate 8 fixedly mounted on the main body frame 2 and capable of ascending and descending through the operating shaft 12, The plate 6 and the lower plate 8 are spaced apart from each other with a working space through which the measuring plate 14 provided at the end of the working shaft 12 can move,
The measurement gauge 16 includes a button portion 22 for raising the measurement plate 14 in a state where the air gap core A is not placed on the measurement plate 14 to adjust the zero point, And a screen display unit 20 for indicating the thickness,
The measurement pin 14 is moved toward the inside of the measurement gauge 16 by the rise of the measurement plate 14 by driving the hydraulic cylinder 10 with the air gap core A positioned on the measurement plate 14 The pressure of the hydraulic cylinder 10 for measuring the average thickness of the air gap core A located at the upper portion of the measurement plate 14 by calculating the pushed-in degree,
The operation shaft 12 is finely tilted due to the clearance between the lower plate 8 and the operation shaft 12 so that the portion of the upper plate 6 and the lowest thickness layer T2 of the air gap core A contacts the secondary contact Is 35 to 45 kgf / cm < 2 >.
delete delete delete delete The method according to claim 1,
Wherein the measuring plate (14) is formed to be larger than the diameter of the air gap core (A) in order to measure the average thickness of the entire air gap core (A) at one time.
A method of measuring an air gap thickness of an injector using an apparatus for measuring an air gap thickness of an inductor according to claim 6,
The measurement plate 14 connected to the hydraulic cylinder 10 is in contact with the top plate 6 by driving the hydraulic cylinder 10 in a state where the air gap core A is not placed on the upper side of the measurement plate 14 Adjusting the zero point of the measurement gauge 16,
After the zero point of the measuring gauge 16 is adjusted, the air gap core A is placed on the upper part of the measuring plate 14 with the measuring plate 14 lowered by the hydraulic cylinder 10, Up operation of the measuring plate 14,
The measurement plate 14 is lifted and the air gap core A positioned at the upper portion of the measurement plate 14 is completely in close contact with the top plate 6 and is guided through the screen display unit 20 of the measurement gauge 16, And measuring an average thickness of the whole of the injector (A).
KR1020150159451A 2015-11-13 2015-11-13 Air gap ring thickness measurement apparatus of injector and measurement method using that KR101834327B1 (en)

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KR101834327B1 true KR101834327B1 (en) 2018-03-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102220019B1 (en) * 2019-11-07 2021-02-25 주식회사 오성엠피 Injector nozzle inspection device and injector nozzle inspection method using the same

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2441113Y (en) * 2000-09-14 2001-08-01 西南石油学院 Device for measuring thickness of filtering cake for drilling fluid
JP2008292374A (en) 2007-05-25 2008-12-04 Asahi Kasei Chemicals Corp Method for measuring thickness of fine porous membrane and apparatus used therefor
CN102486365A (en) * 2010-12-03 2012-06-06 南车成都机车车辆有限公司 Air gauge and working method thereof
JP2012145439A (en) 2011-01-12 2012-08-02 Sumco Corp Apparatus and method for measuring thickness of substrate
KR101471024B1 (en) 2013-06-12 2014-12-09 (주)아이콘 Spacer thickness measure device for camera lens
CN104359375A (en) 2014-12-07 2015-02-18 中国电子科技集团公司第四十六研究所 Single crystal wafer thickness measuring device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2441113Y (en) * 2000-09-14 2001-08-01 西南石油学院 Device for measuring thickness of filtering cake for drilling fluid
JP2008292374A (en) 2007-05-25 2008-12-04 Asahi Kasei Chemicals Corp Method for measuring thickness of fine porous membrane and apparatus used therefor
CN102486365A (en) * 2010-12-03 2012-06-06 南车成都机车车辆有限公司 Air gauge and working method thereof
JP2012145439A (en) 2011-01-12 2012-08-02 Sumco Corp Apparatus and method for measuring thickness of substrate
KR101471024B1 (en) 2013-06-12 2014-12-09 (주)아이콘 Spacer thickness measure device for camera lens
CN104359375A (en) 2014-12-07 2015-02-18 中国电子科技集团公司第四十六研究所 Single crystal wafer thickness measuring device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102220019B1 (en) * 2019-11-07 2021-02-25 주식회사 오성엠피 Injector nozzle inspection device and injector nozzle inspection method using the same

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