KR20160044789A - Pressure Sensor Glow Plug - Google Patents

Pressure Sensor Glow Plug Download PDF

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Publication number
KR20160044789A
KR20160044789A KR1020140139687A KR20140139687A KR20160044789A KR 20160044789 A KR20160044789 A KR 20160044789A KR 1020140139687 A KR1020140139687 A KR 1020140139687A KR 20140139687 A KR20140139687 A KR 20140139687A KR 20160044789 A KR20160044789 A KR 20160044789A
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KR
South Korea
Prior art keywords
coil
pressure sensor
inner pole
elastic coupling
glow plug
Prior art date
Application number
KR1020140139687A
Other languages
Korean (ko)
Inventor
박종철
구본정
김진욱
Original Assignee
주식회사 유라테크
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.)
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Publication date
Application filed by 주식회사 유라테크 filed Critical 주식회사 유라테크
Priority to KR1020140139687A priority Critical patent/KR20160044789A/en
Publication of KR20160044789A publication Critical patent/KR20160044789A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
    • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/24—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid specially adapted for measuring pressure in inlet or exhaust ducts of internal-combustion engines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
    • G01L23/26—Details or accessories

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

The present invention relates to a pressure sensor glow plug used for preheating compressed air in a cylinder so that the compressed air can reach the ignition temperature, a plug body for arranging the configurations of the pressure sensor glow plug, a power source A heating rod inserted into the cylinder and inserted into the cylinder, a heating rod heated by electric energy supplied from the power applying unit, a pressure sensor for measuring the pressure in the combustion chamber of the cylinder, and a pressure sensor extending from the top of the heating rod, And an elastic member connecting the inner pole and the power applying unit. Therefore, by using the elastic member as the connecting member for connecting the power applying unit and the inner pole, even if the heating rod moves up and down along the axial direction for measuring the pressure in the combustion chamber, Avoid errors.

Description

Pressure Sensor Glow Plug

The present invention relates to a glow plug, and more particularly to a glow plug capable of measuring pressure.

The diesel engine adopts a compression ignition method in which the mixed fuel is spontaneously ignited by reaching the ignition temperature instead of the method of sparking and igniting the flame forcibly. However, due to leakage and heat loss during air compression, the compression pressure and the compression temperature become low, which makes starting difficult. The glow plug is thus used to preheat the compressed air so that it can reach its self-ignition temperature. The glow plug includes, for example, a power applying portion for supplying power, a heating rod for heating the combustion chamber of the internal combustion engine, a pressure sensor for measuring the pressure in the combustion chamber, an inner pole extending from the power applying portion, . As the connecting member, a wire or the like may be used. Both ends of the connecting member are respectively coupled to the coupling portion of the power applying portion and the inner pole through a welding process. A pressure sensor is attached to measure the pressure in the cylinder and the pressure rod can be connected to the pressure sensor and the pressure can be measured by the movement of the heating rod moving up and down in the axial direction by the pressure change of the cylinder.

A wire having a weak restoring force is used as a connecting member for connecting the power applying portion and the inner pole extending from the upper portion of the heating rod. As a result, the connecting rod is broken due to the vertical movement of the heating rod over time Lt; / RTI > In addition, since a plurality of welding processes are required to connect the connecting member to the power application unit and the inner pole, it takes a lot of time and cost to manufacture the product, and it is difficult to manage tolerances for welding.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a glow plug in which a pressure gauge is formed, a connection member can be continuously used under the same conditions, It aims at lowering the time and cost of the product.

The present invention relates to a pressure sensor glow plug used to preheat compressed air in a cylinder so that the compressed air can reach the ignition temperature, comprising: a plug body for arranging the configurations of the pressure sensor glow plug; A heating rod inserted in the cylinder and generating heat by electric energy supplied from the power applying unit, a pressure sensor for measuring the pressure in the combustion chamber of the cylinder, a pressure sensor extending from the top of the heating rod and connected to the pressure sensor And an elastic member connecting the inner pole, the inner pole, and the power application unit.

Here, the elastic member is a coil spring.

Wherein the power applying portion includes a body connected to an external power source and a power elastic resilient coupling portion having a smaller diameter than a body for connecting the elastic member, the inner pole includes an inner pole main body extending from an upper portion of the heating rod, And an inner pole elastic coupling portion having a smaller diameter than the inner pole main body for connecting the elastic member.

In this case, the power elastic coupling portion includes a first coil mounting portion for mounting the coil for assembling the coil and a first coil detachment preventing portion for preventing the coil from being separated from the coil mounting portion, The second portion includes a second coil mounting portion on which the coil is mounted for assembly of the coil and a second coil departure preventing portion for preventing the release of the coil mounted on the coil mounting portion.

The first coil detachment prevention portion is protruded in a thickness direction from the first coil mounting portion and the second coil detachment prevention portion is protruded in a thickness direction from the second coil mounting portion. And the second coil detachment preventing portion gradually protrude from the first coil mounting portion and the second coil mounting portion, respectively, so that the shape of the protrusion forms a curved line.

And the first and second coil separation preventing portions include an insertion sloped surface facing the elastic coupling portion opposite to the engagement surface on which the coil is inserted, and the sloped surface of the engagement surface is steeper than the sloped surface of the insertion sloped surface. Includes pressure sensor glow plug.

In addition, the first and second coil insertion holes into which the one end of the coil is inserted are formed in the power supply elastic coupling portion and the inner pole elastic coupling portion, respectively, and the coil inserted in the first and second coil insertion holes And a protrusion is formed inside the elastic elastic coupling part and the elastic part of the inner pole so as to be fixed.

As an effect of the present invention, by using the elastic member as the connecting member, it is possible to prevent the connecting member from being worn out due to the elapse of time even if the heating rod moves up and down for measuring the pressure.

Further, the elastic member is formed of a coil spring, and can be easily coupled so as not to be detached by the separation preventing portion by being wound around the joining portion without using welding. Accordingly, owing to the omission of the welding process, the manufacturing cost can be reduced, the process can be simplified, and the competitiveness against the product unit price can be enhanced. In addition, since precise tolerance management is not required, the parts can be easily manufactured and stress caused by welding is not generated.

The power applying part includes a power elastic resilient engaging part formed of a column having a diameter smaller than that of the body and the body so that the resilient member is engaged with the resilient member. The inner pole includes an inner pole body and a pillar having a smaller diameter than the inner pole body, By providing the elastic coupling portion separately, there is an effect that it is easier to change the shape of the elastic coupling portion for preventing the coil from being separated.

In order to prevent the coil from being separated from the coil mounting portion for mounting the coil for assembling the coil, by setting the coil separation preventing portion protruding in the thickness direction from the coil mounting portion, the coil spring can be easily coupled have.

The coil disengagement prevention portion gradually protrudes from the coil mounting portion so that the shape of the protrusion forms a curved line so that the coil placed on the coil mounting portion is not released by the protruding coil disengagement preventing portion.

The coil spring is caught by the engaging surface of the coil separation preventing portion so that the inclination of the engaging surface is steeper than the inclination of the insertion inclination surface, It does not fall off.

A coil insertion hole into which one end of the coil spring can be inserted is formed so as to be recessed without changing the shape of the elastic coupling portion and the protrusion is formed inside by pushing inward from the outside of the elastic coupling portion after inserting the coil, .

1 is a front view showing an exterior of a main body of a first embodiment of the present invention.
Fig. 2 is a front view of the body of Fig. 1 with the plug body removed. Fig.
3 is an enlarged cross-sectional view of the vicinity of the elastic member of Fig.
4 is an enlarged cross-sectional view of the vicinity of the elastic member of the second embodiment of the present invention.
5 is an enlarged cross-sectional view of part I of Fig.
Fig. 6 is a modification of the coil separation preventing portion of Fig. 5. Fig.
Fig. 7 is a modification of the coil separation preventing portion of Fig. 5. Fig.
8 is an enlarged cross-sectional view of a vicinity of the elastic member of the third embodiment of the present invention.

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

Fig. 1 is a front view showing the outside of the body of the first embodiment of the present invention, Fig. 2 is a front view of the body of Fig. 1 from which the plug body is removed, and Fig. 3 is an enlarged sectional view of the vicinity of the elastic member of Fig.

As shown in these drawings, the pressure sensor glow plug according to the first embodiment of the present invention includes a plug body 100 for arranging the configurations of the pressure sensor glow plug, a power source for supplying electric energy by applying a voltage A heating rod 300 inserted in the cylinder and generating heat by electric energy supplied from the power applying unit 200, a pressure sensor 400 for measuring the pressure in the combustion chamber of the cylinder, An inner pole 500 extending from the upper portion of the heating rod 300 and connected to the pressure sensor 400 and an elastic member 600 connecting the inner pole 500 and the power applying unit 200 do.

The plug body 100 is a cylindrical, hollow, metallic material, in which the components of the pressure sensor glow plug are arranged.

The power applying unit 200 is a part for applying power to the heating rod 300 to supply electric energy and has a shape of a column including a connection terminal 230 connected to a battery or the like. The power applying unit 200 is arranged such that one end of the connection terminal 230 protrudes from the upper portion of the plug body. The power applying unit 200 includes a body 210 having a connection terminal 230 connected to an external battery or the like and a power elastic coupling unit 220 having a smaller diameter than the body 210. Since the power resilient coupling portion 220 does not have to be the same size as the body 210, it is made of a column having a smaller diameter. Therefore, it is easier to change the shape of the power supply elastic coupling portion 220 for preventing the coil from escaping.

The heating rod 300 is made of a metal or a ceramic material, and is a part that receives electrical energy from the power applying unit 200 and converts it into heat energy to be directly heated. The heating rod 300 is in the form of a tube closed at one end so that a heating wire can be inserted into the heating rod 300. The heating rod 300 is arranged such that one end of the heating rod 300 is exposed at a lower portion of the plug body 100.

The pressure sensor 400 is connected to a separate housing coupled to the inner pole 500 so as to surround the inner pole 500 or the inner pole 500 extending from the heating rod 300 in an initial tensioned state Is arranged near the elastic member (600) in the plug body (100). The pressure of the cylinder combustion chamber can be measured.

The inner pole 500 has a long column shape and is made of a metal material. The inner pole 500 extends from the upper portion of the heating rod 300 and connects the resistor to the heating rod, and is connected to the pressure sensor 400. The inner pole 500 includes an inner pole main body 510 extending from an upper portion of the heating rod 300 and an inner pole elastic coupling portion 520 having a smaller diameter than the inner pole main body 510. There is an effect that it is easier to change the shape of the inner pole elastic coupling portion 520 for preventing the coil from departing as in the case of the power applying portion 200. [

The elastic member 600 has elasticity and is made of a material to which electric energy can be transmitted. The elastic member 600 has a shape of a coil spring 601 and is connected to the power applying unit 200 and the inner pole 500. More specifically, one end of the elastic member 600 is coupled to the inner pole elastic coupling portion 520, and the other end is coupled to the power elastic coupling portion 220.

By using the elastic member 600 as the connecting member, it is possible to prevent the connecting member from being broken due to the time lapse due to the vertical movement of the heating rod 300 for pressure measurement, and the elastic member 600 It can be easily combined with the coil spring 601 so as not to be separated by the separation preventing portion by being wound around the coupling portion without using welding. Accordingly, owing to the omission of the welding process, the manufacturing cost can be reduced, the process can be simplified, and the competitiveness against the product unit price can be enhanced. In addition, since precise tolerance management is not required, the parts can be easily manufactured and stress caused by welding is not generated.

In FIG. 3, the inner pole elastic coupling portion 520 and the power elastic coupling portion 220 are formed to be symmetrical to each other. However, the inner pole elastic coupling portion 520 and the power elastic coupling portion 220 are not necessarily limited to this. However, for the sake of convenience of description, the following symmetrical structure is assumed.

The power elastic coupling portion 220 includes a first coil mounting portion 221 on which a coil is mounted for assembling the coil and a first coil departure preventing portion 222 for preventing the coil from being separated from the coil mounting portion The inner pole elastic coupling part 520 includes a second coil mounting part 521 for mounting the coil for assembling the coil and a second coil detachment preventing part 521 for preventing the coil from being separated from the coil mounting part 522). Particularly, the first and second coil separation preventing portions 222 and 522 protrude from the first and second coil mounting portions 221 and 521, respectively.

As described above, since the coil mounting portion for mounting the coil for assembling the coil and the coil separation preventing portion protruding in the thickness direction than the coil mounting portion are formed to prevent the coil from being separated from the coil mounting portion, the coil spring 601, Can be easily coupled so as not to come off.

The first coil detaching portion 222 and the second coil detaching portion 522 protrude from the first coil mounting portion 221 and the second coil mounting portion 521 respectively, . Accordingly, the coil spring 601 may be caught by the protruded first coil separation preventing portion 222 and the second coil separation preventing portion 522, but the first and second coil separation preventing portions 222 and 522 There is a fear of slipping, and it is preferable to protrude to a certain size or more.

The operation of the pressure sensor glow plug shown in the figure is as follows.

The electric energy is supplied by the power applying unit 200 connected to the electric power supplying unit such as the battery and the electric energy applied by the power applying unit 200 is transmitted through the elastic member 600 and the inner pole 500 And transferred to the heating rod 300. The resistor in the heating rod 300 converts the applied electric energy into heat energy and generates heat in the cylinder. This allows the air in the cylinder to be preheated.

The heating rod 300 moves up and down along the axial direction of the plug in accordance with the pressure change of the cylinder combustion chamber and the pressure sensor 400 connected to the inner pole 500 extended from the heating rod 300 senses this, The internal pressure can be measured. A sliding member may be inserted between the plug body 100 and the heating rod 300 so that the heating rod 300 can move along the axial direction.

5 is an enlarged cross-sectional view of the portion I of Fig. 4, Fig. 6 is a modification of the coil separation preventing portion of Fig. 5, Fig. It is another variation of the prevention part.

According to the second embodiment of the present invention shown in FIGS. 4 and 5, the power supply elastic coupling portion 1220 includes a first coil mounting portion 1221 on which a coil is mounted for assembly of a coil, The inner coil elastic coupling portion 1520 includes a second coil mounting portion 1521 for mounting the coil for assembling the coil and a second coil mounting portion 1521 for mounting the coil, And a second coil deviation preventing portion 1522 for preventing the coil from being separated from the coil. Particularly, the first and second coil separation preventing portions 1222 and 1522 protrude from the first and second coil mounting portions 1221 and 1521, respectively. The first and second coil separation preventing portions 1222 and 1522 include insertion sloped surfaces 1222b and 1522b facing the elastic coupling portions opposite to the engagement surfaces 1222a and 1522a on which the coil is inserted, The inclination is steeper than the inclination of the insertion inclined surface, and in particular, the engaging surface is perpendicular to the coil mounting portion. The engaging surface or the insertion inclined surface may be a curved surface rather than a flat surface. As a result, the coil spring 601 is caught by the jaw and is prevented from being released.

6, the power supply elastic coupling portion 2220 includes a first coil mounting portion 2221 and a first coil separation preventing portion 2222, and the inner pole elastic coupling portion 2520 includes a first coil mounting portion 2221 and a second coil releasing preventing portion 2222, And includes a coil mounting portion 2521 and a second coil deviation preventing portion 2522. In particular, the first and second coil separation preventing portions 2222 and 2522 protrude from the first and second coil mounting portions 2221 and 2521, respectively. The first and second coil separation preventing portions 2222 and 2522 include the engaging surfaces 2222a and 2522a and the insertion inclined surfaces 2222b and 2522b so that the inclination of the engaging surface is more abrupt than the inclination of the insertion inclined surface, In particular, the engaging surface has an acute angle with the coil mounting portion and has an inclination in the same direction as the insertion inclining surface. The engaging surface or the insertion inclined surface may be a curved surface rather than a flat surface. As a result, the coil spring 601 is caught by the jaw and is prevented from being released.

7, the power supply elastic coupling portion 3220 includes a first coil mounting portion 3221 and a first coil separation preventing portion 3222, and the inner pole elastic coupling portion 3520 includes a second coil mounting portion 3221 And includes a coil mounting portion 3521 and a second coil deviation preventing portion 3522. Particularly, the first and second coil separation preventing portions 3222 and 3522 protrude from the first and second coil mounting portions 3221 and 3521, respectively. The first and second coil deviation preventing portions 3222 and 3522 include the engaging surfaces 3222a and 3522a and the insertion inclined surfaces 3222b and 3522b so that the inclination of the engaging surface is more abrupt than the inclination of the insertion inclined surface, And in particular, the engaging surface has an obtuse angle with the coil mounting portion and has an inclination different from that of the insertion inclined surface. The engaging surface or the insertion inclined surface may be a curved surface rather than a flat surface. As a result, the coil spring 601 is caught by the jaw and is prevented from being released.

5, 6, and 7, all of the engaging faces have a steeper slope than that of the insertion slope, but the stitches may be formed in a direction along which the coils can be detached to prevent the stator from being detached in a stable manner.

8 is an enlarged cross-sectional view of a vicinity of the elastic member of the third embodiment of the present invention.

8, the coil spring 601 is not wound around the power supply elastic coupling portion 220 and the inner pole elastic coupling portion 520, but the power supply elastic coupling portion 220 and the inner Inserted into the first coil insertion hole 223 and the second coil insertion hole 523 which are formed in the inside of the pole elastic coupling portion 520, respectively. When the coil spring 601 is inserted, the coil spring 601 is fixed by a caulking method which presses the coil spring 601 from the outside to the inside so as to protrude inwards using a blunt tool. As a result, the inserted coil spring 601 is prevented from being separated by the inwardly projecting protrusions 700 without changing the shape of the elastic coupling portion.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It is to be understood that both the technical idea and the technical spirit of the invention are included in the scope of the present invention.

100: plug body 200:
210: torso
220, 1220, 2220, 3220:
221, 1221, 2221, 3221: the first coil mounting portion
222, 1222, 2222, and 3222: the first coil-
1222a, 2222a, 3222a:
1222b, 2222b, 3222b:
223: first coil insertion hole 230: connection terminal
300: heating rod 400: pressure sensor
500: Inner pole 510: Inner pole body
520, 1520, 2520, 3520: Inner pole elastic binding portion
521, 1521, 2521, 3521: the second coil mounting portion
522, 1522, 2522, and 3522:
1522a, 2522a, 3522a:
1522b, 2522b, and 3522b:
523: second coil insertion hole 600: elastic member
601: coil spring 700: projection

Claims (10)

A pressure sensor glow plug used to preheat compressed air in the cylinder to reach the ignition temperature,
A plug body (100) having a hollow therein;
A power applying unit 200 inserted into the hollow and protruding from one end of the plug body 100;
A heating rod 300 inserted into the hollow and protruding from one end of the plug body 100 and electrically connected to the power applying unit 200;
A pressure sensor (400) installed in the plug body (100) for measuring a pressure in the combustion chamber of the cylinder;
An inner pole 500 extending from the top of the heating rod 300;
An elastic member 600 connecting the inner pole 500 and the power applying unit 200; To
And a pressure sensor glow plug. The method according to claim 1,
Wherein the elastic member (600) is a coil spring (601). 3. The method of claim 2,
The power applying unit 200 includes a body 210 connected to an external power source; And
A power supply elastic coupling part 220 formed of a column having a smaller diameter than the body; / RTI >
The inner pole (500) includes an inner pole body (510) extending from an upper portion of the heating rod (300); And
An inner pole elastic coupling part 520 having a smaller diameter than the inner pole main body 510; And a pressure sensor glow plug. The method of claim 3,
The power supply elastic coupling portion 220 includes a first coil mounting portion 221 on which a coil is mounted for assembling the coil; And
A first coil detachment preventing portion 222 for preventing the coil from being disengaged from the coil mounting portion; / RTI >
The inner pole elastic coupling portion 520 includes a second coil mounting portion 521 on which a coil is mounted for assembling the coil; And
A second coil deviation preventing portion (522) for preventing the coil from being released from the coil placed on the coil mounting portion; And a pressure sensor glow plug. 5. The method of claim 4,
The first coil detaching portion 222 protrudes in a thickness direction from the first coil mounting portion 221 and the second coil detaching portion 522 protrudes in the thickness direction of the second coil mounting portion 521 Wherein the pressure sensor glow plug is protruded from the pressure sensor glow plug. 6. The method of claim 5,
The first coil separation part 222 and the second coil separation prevention part 522 are gradually projected from the first coil installation part 221 and the second coil installation part 521, Wherein the shape of the glow plug is curved. 6. The method of claim 5,
The first coil separation preventing portion 1222 includes a receiving surface 1222a on which the inserted coil is caught and an insertion inclined surface 1222b on which the inner pole elastic coupling portion 1520 is viewed, The inclined surfaces of the engaging surfaces 1222a and 1522a are inclined with respect to the insertion inclined surface 1222a and the inclined surfaces of the engaging surfaces 1222a and 1522a are inclined with respect to the insertion inclined surface 1222a, 1222b, and 1522b of the pressure sensor glow plug. The method of claim 3,
The first coil insertion hole 223 into which the one end of the coil is inserted is formed in the power supply elastic coupling portion 220 and the second coil insertion hole 223 in which the one end of the coil is inserted is formed in the inner coil elastic coupling portion 520, And an insertion hole (523) is formed by being recessed. 9. The method of claim 8,
The coil inserted into the first coil insertion hole 223 and the coil inserted into the second coil insertion hole 523 are fixed to each other so that the power supply elastic coupling part 220 and the inner pole elastic coupling part 520 And a protrusion (700) is formed inwardly. 10. The method of claim 9,
Wherein the protrusion (700) is formed by caulking with a blunt tool outside the first coil insertion hole (223) and the second coil insertion hole (523) in which the coil is inserted.
KR1020140139687A 2014-10-16 2014-10-16 Pressure Sensor Glow Plug KR20160044789A (en)

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Application Number Priority Date Filing Date Title
KR1020140139687A KR20160044789A (en) 2014-10-16 2014-10-16 Pressure Sensor Glow Plug

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Application Number Priority Date Filing Date Title
KR1020140139687A KR20160044789A (en) 2014-10-16 2014-10-16 Pressure Sensor Glow Plug

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101879303B1 (en) * 2017-01-09 2018-07-17 주식회사 유라테크 Glow-plug with pressure sensor of improved structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101879303B1 (en) * 2017-01-09 2018-07-17 주식회사 유라테크 Glow-plug with pressure sensor of improved structure

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