WO2014178449A1 - Bougie d'allumage comportant un capteur d'oxygène - Google Patents

Bougie d'allumage comportant un capteur d'oxygène Download PDF

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Publication number
WO2014178449A1
WO2014178449A1 PCT/KR2013/003720 KR2013003720W WO2014178449A1 WO 2014178449 A1 WO2014178449 A1 WO 2014178449A1 KR 2013003720 W KR2013003720 W KR 2013003720W WO 2014178449 A1 WO2014178449 A1 WO 2014178449A1
Authority
WO
WIPO (PCT)
Prior art keywords
oxygen sensor
spark plug
center electrode
insulator
oxygen
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2013/003720
Other languages
English (en)
Korean (ko)
Inventor
오진우
최규철
안용흠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KG Mobility Corp
Original Assignee
Ssangyong Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ssangyong Motor Co Ltd filed Critical Ssangyong Motor Co Ltd
Priority to PCT/KR2013/003720 priority Critical patent/WO2014178449A1/fr
Publication of WO2014178449A1 publication Critical patent/WO2014178449A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T13/00—Sparking plugs
    • H01T13/40—Sparking plugs structurally combined with other devices

Definitions

  • the present invention relates to a spark plug, and more particularly to a spark plug having an oxygen sensor installed in the spark plug to measure the oxygen content in the mixer of the internal combustion engine to grasp the combustion state of the internal combustion engine. .
  • an internal combustion engine is provided with a spark plug for igniting a fuel-air mixture of fuel and air during an intake stroke.
  • the spark plug causes a spark discharge in the combustion chamber to ignite the mixer.
  • a spark plug with a pressure sensor is used.
  • the electrode part is used to further increase the ignition energy by using iridium (Ir) in the existing platinum (Pt).
  • an oxygen sensor is mounted on a rear end of a engine and a three way catalysist to determine an engine combustion state.
  • the combustion condition changes with the air-fuel ratio of the mixer around the spark plug.
  • the air-fuel ratio of the mixer around the spark plug in the combustion chamber cannot be grasped, and thus stable combustion cannot be realized in an ultra-lean state.
  • the present invention has been made in order to solve the above problems of the prior art, by installing an oxygen sensor inside the spark plug to measure the oxygen content in the mixer of the internal combustion engine to determine the combustion state of the internal combustion engine ignition
  • the purpose is to provide a plug.
  • a spark plug having an oxygen sensor includes a center electrode, an insulator in which the center electrode is disposed, a housing surrounding at least a portion of the insulator, the housing and the insulator And an oxygen sensor disposed therebetween to measure the oxygen content of the mixer in the combustion chamber, and a ground electrode disposed to face one end of the housing with a predetermined gap therebetween.
  • the spark plug according to the invention is characterized in that it further comprises a control device for controlling the air-fuel ratio by adjusting the amount of fuel in accordance with the oxygen content of the mixer measured by the oxygen sensor.
  • the housing is characterized in that it comprises an oxygen sensor protector is formed extending further than the lower end of the oxygen sensor.
  • the lower end of the oxygen sensor protector is characterized in that it is formed to be bent inward to prevent sparks from splashing into the inside of the oxygen sensor during the operation of the spark plug.
  • the oxygen sensor protection unit may include a plurality of oxygen sensing holes formed at predetermined intervals along an outer circumferential surface of the oxygen sensor protecting unit to expose the oxygen sensor to the mixer in the combustion chamber.
  • the lower end of the center electrode and the insulator is characterized in that it is formed to have a tapered shape in the direction of the ground electrode.
  • the thermal expansion absorbing portion is provided in a predetermined section of the lower end of the oxygen sensor and the center electrode.
  • the present invention can determine the combustion state of the internal combustion engine by installing an oxygen sensor inside the spark plug to measure the oxygen content in the mixer of the internal combustion engine.
  • the present invention measures the oxygen content of the mixer by using an oxygen sensor to determine the air-fuel ratio of the mixer, and can be used as feedback on the ignition timing and the ignition energy based on the determined air-fuel ratio. Therefore, the present invention can realize stable combustion even in an ultrathin state.
  • FIG. 1 is a perspective view showing a spark plug having an oxygen sensor according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of the spark plug shown in FIG. 1.
  • FIG. 2 is a cross-sectional view of the spark plug shown in FIG. 1.
  • FIG 3 is a perspective view and a cross-sectional view showing a spark plug according to another embodiment of the present invention.
  • the spark plug of the present invention is intended to be applied to an ultra-thin direct injection engine, which is located together with a fuel injection nozzle (Fuel-Injector) in the upper center of the cylinder head and the lower stroke of the piston during the intake stroke and the fuel injected through the fuel injection device.
  • a fuel injection nozzle Fluel-Injector
  • By measuring the air-fuel ratio of the mixer made by mixing the air sucked by the movement can be used as a feedback on the ignition timing and ignition energy. Therefore, by grasping the air-fuel ratio of the mixer around the spark plug, it is possible to implement stable combustion even in an ultra-lean state.
  • FIG. 1 is a perspective view illustrating a spark plug having an oxygen sensor according to the present invention
  • FIG. 2 is a cross-sectional view of the spark plug shown in FIG. 1
  • FIG. 3 is a spark plug according to another embodiment of the present invention. The perspective view and sectional drawing shown are shown.
  • the spark plug 100 having an oxygen sensor according to the present invention includes a center electrode 110, an insulator 120, a housing 130, an oxygen sensor 140, a ground electrode 150, And terminal 160.
  • the center electrode 110 is formed in a pillar shape and is installed perpendicular to the center of the spark plug 100 to serve as a central axis.
  • the center electrode 110 is made of a material having conductivity such as a nickel alloy.
  • a spark is generated between the ground electrode 150 and the point where the ignition is performed.
  • the insulator 120 is cylindrical and the center electrode 110 penetrates inside.
  • the insulator 120 is made of an insulator such as ceramic.
  • the insulator 120 serves to prevent the high voltage from leaking to the outside when a high voltage is supplied to the center electrode 110.
  • the lower ends of the center electrode 110 and the insulator 120 are formed to have a tapered shape in the direction of the ground electrode 150. This is to increase the spark discharge between the center electrode 100 and the ground electrode 150 to be described later under the high pressure generated in the ignition coil.
  • the housing 130 is formed in a cylindrical shape and is disposed to surround at least a portion of the insulator 120.
  • the insulator 120 is fixedly installed inside the housing 130.
  • One end of the housing 130 is mounted in a hole that opens the combustion chamber (cylinder) of the internal combustion engine.
  • the housing 130 is formed with a fixing part 131 inserted into a hole for opening the combustion chamber of the internal combustion engine to fix the spark plug 100 to the combustion chamber.
  • An upper step of the fixing part 131 is formed to stop the coupling of the fixing part 131 when the fixing part 131 is coupled to the hole of the combustion chamber.
  • the oxygen sensor protecting part 132 having a smaller diameter than the fixing part 131 is formed to extend below the fixing part 131.
  • the oxygen sensor protector 132 serves to protect the oxygen sensor 140 to be described later when the spark plug 100 is mounted to the engine.
  • the lower end of the oxygen sensor protection unit 132 is formed to be spaced apart from the lower end of the oxygen sensor 140 by a predetermined distance. In other words, the oxygen sensor protector 132 is formed to extend a predetermined length longer than the lower end of the oxygen sensor 140.
  • the lower end of the oxygen sensor protector 132 is formed to be bent inwardly to prevent sparks (flame) from splashing into the oxygen sensor 140 when the spark plug 100 operates.
  • a plurality of oxygen sensing holes 133 are formed at predetermined intervals along the outer circumferential surface.
  • the oxygen sensing hole 133 allows the oxygen sensor 140 to come into contact with the mixer to measure the accurate amount of oxygen.
  • the plurality of oxygen sensing holes 133 may be formed in an n ⁇ m array along the outer circumferential surface of the oxygen sensor protector 132 as shown in FIG. 3.
  • the oxygen sensor 140 is fixedly installed between the housing 130 and the insulator 120 to measure the oxygen content contained in the mixed gas (mixer) of air / fuel in the combustion chamber of the internal combustion engine. That is, the oxygen sensor 140 measures the air-fuel ratio (weight ratio of air and fuel) of the mixer.
  • the oxygen sensor 140 transmits the measured air-fuel ratio of the mixer to the controller (not shown) through the cable 141, and the controller (not shown) feeds the measured air-fuel ratio of the mixer to the ignition timing and the ignition energy. Use as. In other words, the controller (not shown) adjusts the fuel amount according to the amount of oxygen contained in the mixer measured through the oxygen sensor 140, thereby controlling the air-fuel ratio of the mixer.
  • the end of the cable 141 is provided with a connector for connecting with a control device (not shown).
  • the thermal expansion absorbing unit 170 is provided at a predetermined section of the lower end of the oxygen sensor 140 and the center electrode 110.
  • the thermal expansion absorbing unit 170 absorbs thermal expansion to prevent breakage of the oxygen sensor 140.
  • the ground electrode 150 has a predetermined gap with one end of the center electrode 110 at the lower end of the housing 130 and is installed to face the lower end of the housing 130.
  • the ground electrode 150 is generally formed in an L shape, but is not limited thereto and may be formed in various shapes.
  • the ground electrode 150 is made of a conductor such as a nickel alloy like the center electrode 110, and must withstand high temperature and have excellent durability.
  • the terminal 160 is installed at the other end of the center electrode 110 to supply electricity to the center electrode 110.
  • the present invention discloses determining the air-fuel ratio of the mixer around the spark plug by using an oxygen sensor, but is not limited thereto.
  • the pressure sensor may be further applied to realize the state of the internal combustion engine more accurately.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)

Abstract

La présente invention porte sur une bougie d'allumage comportant un capteur d'oxygène. La bougie d'allumage selon la présente invention comprend : une électrode centrale (110) ; un isolant (120) ayant l'électrode centrale localisée à l'intérieur de celui-ci ; un boîtier (130) entourant au moins une partie de l'isolant (120) ; un capteur d'oxygène (140), installé entre le boîtier (130) et l'isolant (120), pour mesurer un contenu d'oxygène dans un mélangeur à l'intérieur d'une chambre de combustion ; et une électrode de masse (150) installée au niveau d'une extrémité du boîtier (130) pour faire face à l'électrode centrale avec un espacement prédéterminé entre celles-ci.
PCT/KR2013/003720 2013-04-30 2013-04-30 Bougie d'allumage comportant un capteur d'oxygène Ceased WO2014178449A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/KR2013/003720 WO2014178449A1 (fr) 2013-04-30 2013-04-30 Bougie d'allumage comportant un capteur d'oxygène

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/KR2013/003720 WO2014178449A1 (fr) 2013-04-30 2013-04-30 Bougie d'allumage comportant un capteur d'oxygène

Publications (1)

Publication Number Publication Date
WO2014178449A1 true WO2014178449A1 (fr) 2014-11-06

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ID=51843570

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2013/003720 Ceased WO2014178449A1 (fr) 2013-04-30 2013-04-30 Bougie d'allumage comportant un capteur d'oxygène

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Country Link
WO (1) WO2014178449A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0817551A (ja) * 1994-07-01 1996-01-19 Nippon Soken Inc 内燃機関用点火プラグ
JPH10289776A (ja) * 1997-04-16 1998-10-27 Takashi Wakabayashi センサー付点火プラグ
KR20090034366A (ko) * 2006-07-07 2009-04-07 콘티넨탈 오토모티브 프랑스 압력 센서를 일체화하는 스파크 플러그
JP4302224B2 (ja) * 1999-02-22 2009-07-22 日本特殊陶業株式会社 スパークプラグ
KR20110119761A (ko) * 2009-01-29 2011-11-02 페더럴-모굴 이그니션 컴퍼니 일체형 연소 센서를 구비한 스파크 플러그 및 그러한 스파크 플러그를 장착한 엔진 컴포넌트

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0817551A (ja) * 1994-07-01 1996-01-19 Nippon Soken Inc 内燃機関用点火プラグ
JPH10289776A (ja) * 1997-04-16 1998-10-27 Takashi Wakabayashi センサー付点火プラグ
JP4302224B2 (ja) * 1999-02-22 2009-07-22 日本特殊陶業株式会社 スパークプラグ
KR20090034366A (ko) * 2006-07-07 2009-04-07 콘티넨탈 오토모티브 프랑스 압력 센서를 일체화하는 스파크 플러그
KR20110119761A (ko) * 2009-01-29 2011-11-02 페더럴-모굴 이그니션 컴퍼니 일체형 연소 센서를 구비한 스파크 플러그 및 그러한 스파크 플러그를 장착한 엔진 컴포넌트

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