EP2962370A1 - Zündkerze - Google Patents
ZündkerzeInfo
- Publication number
- EP2962370A1 EP2962370A1 EP14706033.9A EP14706033A EP2962370A1 EP 2962370 A1 EP2962370 A1 EP 2962370A1 EP 14706033 A EP14706033 A EP 14706033A EP 2962370 A1 EP2962370 A1 EP 2962370A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insulator
- rounding
- spark plug
- housing
- seat
- 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.)
- Granted
Links
- 239000012212 insulator Substances 0.000 claims abstract description 51
- 230000008859 change Effects 0.000 claims abstract description 9
- 230000007704 transition Effects 0.000 claims description 27
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 230000000284 resting effect Effects 0.000 claims 2
- 210000002414 leg Anatomy 0.000 description 23
- 210000003414 extremity Anatomy 0.000 description 5
- 238000005452 bending Methods 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 230000035515 penetration Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000000689 upper leg Anatomy 0.000 description 1
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
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
- H01T13/34—Sparking plugs characterised by features of the electrodes or insulation characterised by the mounting of electrodes in insulation, e.g. by embedding
-
- 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
- H01T13/20—Sparking plugs characterised by features of the electrodes or insulation
Definitions
- the present invention relates to a spark plug for an internal combustion engine.
- the spark plugs have a multiplicity of transitions with cross-sectional changes. These transitions are usually provided with fillets. Viewed in cross-section, the fillets usually describe a circular section.
- Fillets are typical weak points for the mechanical failure of a spark plug.
- the fillets are designed on the cross-sectional changes of the individual components of the spark plug according to the load occurring. This improves the mechanical and electromechanical strength and durability of the spark plug. At the same time, the spark plug is simple and
- At least one rounding on the spark plug is designed so that, viewed in cross-section, it no longer has one
- a spark plug comprising a housing, one inserted into the housing Insulator, a center electrode inserted into the insulator and a terminal bolt inserted in the insulator.
- the insulator serves to electrically insulate the center electrode and the terminal bolt from the housing.
- a spark is generated on a combustion chamber side facing the spark plug.
- the connection bolt is used to connect a cable or a plug.
- a ground electrode is preferably electrically conductively connected to the housing and also positioned on the combustion chamber side facing the spark plug.
- the housing and the insulator are hollow members extending along a center axis of the spark plug. At these two components, the fillets can be formed both inside and outside Shen. According to the invention, it is provided that the rounding viewed in cross-section, a first
- Leg length has. If the rounding is considered in cross-section, the rounding transitions into two straight lines at two transition points. The leg lengths are measured from one transition point to the other transition point. In each case, a leg length is measured parallel to one of the straight lines. The first leg length is greater than the second leg length. Due to the different design of the leg lengths, the rounding can be configured according to the force. As a result, the fillet used according to the invention is mechanically more stable than the conventional circular fillet.
- rounding describes in the
- a curve which is tangent to the legs and, between its beginning and end may have a general shape.
- This general form can be described for example by a hyperbola, ellipse, parabola, evolute, involute, Bezier curve, spline, or the like.
- the curve is tangentially continuous.
- the first limb length is preferably at least 1.3 times, preferably at least 1.5 times, particularly preferably at least twice, the second limb length. As a result, it is possible to react sufficiently to the unilateral action of force at the rounding. It is preferably provided that the first leg length is arranged perpendicular to the largest, acting on the rounding force. In particular, the first leg length is perpendicular to the center axis of the spark plug.
- the two leg lengths are preferably between two
- Transition points defined at the transition points the rounding passes into a straight line.
- the two leg lengths are each measured parallel to one of the two straight lines into which the rounding passes.
- the connecting bolt preferably comprises a bolt shank and a collar. With the collar, the connecting bolt rests on the insulator.
- the rounding is preferably formed at the transition from the collar to the bolt shank.
- the first leg length preferably extends in the direction of the collar, that is perpendicular to the center axis of the spark plug. This results in a reduction of the maximum tensile stress and thus avoidance or reduction of stress corrosion cracking.
- the housing preferably comprises a shaft on which a thread, a
- Polygonal and a shrinkage recess are formed.
- the thread is used to screw the spark plug into an engine block.
- a tool for screwing the spark plug can be attached.
- the rounding is preferred at the transition from the shaft to the thread, in particular
- Threaded recess formed.
- the first leg length preferably extends perpendicular to the central axis, whereby a reduction of the maximum tensile stress at this rounding is achieved.
- the rounding is formed at the transition of the shaft for shrinkage penetration and / or at the transition of the polygon for shrinkage penetration. Also at these rounding preferably extends the first leg length perpendicular to the central axis, so that a reduction of the maximum tensile stress is achieved.
- the center electrode preferably has a first seat at a cross-sectional change. This first seat rests on the insulator. This location of the insulator is referred to as the center electrode seat.
- the insulator itself preferably has a second seat on a cross-sectional change. With this second seat, the insulator rests on the housing. The corresponding location on the housing is referred to as insulator seat.
- the insulator has a housing seat at a cross-sectional change. At this housing seat a combustion chamber side facing away from the housing.
- the rounding is formed on the first seat and / or second seat and / or center electrode seat and / or insulator seat and / or housing seat.
- the rounding serves to reduce the maximum tensile / bending stresses and thus to avoid or reduce central electrode fractures.
- the housing seat of the insulator is formed as a collar on which the housing rests. The use of rounding on
- Spark plug can be used preferably. Brief description of the drawings
- FIG. 1 shows a spark plug according to the invention according to a
- FIG. 2 shows a detail of FIG. 1,
- Figure 3 is a first view of a rounding of the invention
- Figure 4 is a second view of the rounding of the invention
- FIG. 1 shows a spark plug 1 in a half-sectioned view.
- Spark plug 1 comprises a housing 2.
- an insulator 3 is inserted.
- the housing 2 and the insulator 3 are each hollow inside.
- a center electrode 4 is inserted in the insulator 3.
- a connecting bolt 5 is inserted in the insulator 3.
- the Panat 6 electrically connects the center electrode 4 to the connecting bolt 5.
- the housing 2 faces the combustion chamber Side a ground electrode 7 electrically connected. Between the ground electrode 7 and the
- the spark plug 1 extends around a central axis 8.
- the housing 2 has a shaft 9. At this shaft 9 a polygon 10, a shrinkage recess 1 1 and thread 12 are formed. The thread 12 is used to screw the spark plug 1 in an internal combustion engine.
- the connecting bolt 5 comprises a bolt shaft 14 which extends along the central axis 8, and a collar 13. With the collar 13 is the
- the insulator 3 has an insulator collar 23 and a foot cone 28.
- the insulator 3 comprises at the transition to the foot cone 28 a central electrode seat 16. At this center electrode seat 16, the center electrode 4 is at a first
- the housing 2 has an insulator seat 18 on its inside. On the insulator 3, a second seat 17 is formed. This second seat 17 is located on the insulator seat 18. Depending on the temperature of the spark plug 1, a gap between the second seat 17 and the insulator seat 18 may be present here. Furthermore, the insulator 3 has a housing seat 19 on its insulator collar 23. At this housing seat 19, the housing 2 is located.
- fillets 20 are provided with a corresponding geometry.
- FIGS. 3 and 4 The geometry of the fillets 20 are shown in FIGS. 3 and 4 in detail. In both figures, a cross section of the rounding 20 can be seen.
- FIG. 3 shows that the rounding 20 merges into a straight line at each of its two ends.
- the transition points from the rounding 20 in the line are provided with the reference numeral 24.
- a first leg length 21 and a second leg length 22 are measured between the two transition points 24.
- first limb length 21 is substantially longer than the second limb length 22.
- the first limb length 21 is defined in accordance with the force 25 acting on the rounding 20.
- FIG. 4 likewise shows the rounding 20 viewed in cross-section. By means of the three straight lines 27, the final contour of the rounding 20 and the ratio of the two leg lengths 21, 22 are determined.
- Figure 4 shows the Compare the course of a conventional rounding 26 with two equal legs.
- the fillet 20 according to the invention can be applied to all cross-sectional transitions of the spark plug 1.
Landscapes
- Spark Plugs (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL14706033T PL2962370T3 (pl) | 2013-03-01 | 2014-02-21 | Świeca zapłonowa |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013203566.7A DE102013203566A1 (de) | 2013-03-01 | 2013-03-01 | Zündkerze |
PCT/EP2014/053451 WO2014131705A1 (de) | 2013-03-01 | 2014-02-21 | Zündkerze |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2962370A1 true EP2962370A1 (de) | 2016-01-06 |
EP2962370B1 EP2962370B1 (de) | 2020-08-05 |
Family
ID=50156768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14706033.9A Active EP2962370B1 (de) | 2013-03-01 | 2014-02-21 | Zündkerze |
Country Status (9)
Country | Link |
---|---|
US (1) | US9819155B2 (de) |
EP (1) | EP2962370B1 (de) |
JP (1) | JP6186014B2 (de) |
CN (1) | CN105009389B (de) |
BR (1) | BR112015020538B1 (de) |
DE (1) | DE102013203566A1 (de) |
ES (1) | ES2827958T3 (de) |
PL (1) | PL2962370T3 (de) |
WO (1) | WO2014131705A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6422841B2 (ja) * | 2015-10-20 | 2018-11-14 | 日本特殊陶業株式会社 | スパークプラグ |
DE102019126831A1 (de) | 2018-10-11 | 2020-04-16 | Federal-Mogul Ignition Llc | Zündkerze |
DE102018222460A1 (de) | 2018-12-20 | 2020-06-25 | Robert Bosch Gmbh | Zündkerze mit verrundetem Isolatorfuß-Abschnitt |
DE102018222475A1 (de) * | 2018-12-20 | 2020-06-25 | Robert Bosch Gmbh | Zündkerze mit verrundetem Gehäuse-Abschnitt |
DE102018222468A1 (de) * | 2018-12-20 | 2020-06-25 | Robert Bosch Gmbh | Zündkerze mit verrundetem Isolatorfuß-Abschnitt und verrundetem Gehäuse-Abschnitt |
DE102020206970A1 (de) | 2020-06-04 | 2021-12-09 | Robert Bosch Gesellschaft mit beschränkter Haftung | Zündkerze |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5115526U (de) * | 1974-07-22 | 1976-02-04 | ||
JP3876071B2 (ja) * | 1998-06-03 | 2007-01-31 | 日本特殊陶業株式会社 | スパークプラグ |
JP4596700B2 (ja) * | 2001-07-26 | 2010-12-08 | 日本特殊陶業株式会社 | スパークプラグ |
JP2004022450A (ja) * | 2002-06-19 | 2004-01-22 | Denso Corp | 内燃機関用スパークプラグ |
JP4220308B2 (ja) * | 2003-05-29 | 2009-02-04 | 株式会社デンソー | スパークプラグ |
DE10340043B4 (de) * | 2003-08-28 | 2014-10-30 | Robert Bosch Gmbh | Zündkerze |
DE10342912A1 (de) * | 2003-09-17 | 2005-04-21 | Bosch Gmbh Robert | Zündkerze |
JP2005129377A (ja) * | 2003-10-24 | 2005-05-19 | Denso Corp | スパークプラグ |
JP4534870B2 (ja) * | 2004-07-27 | 2010-09-01 | 株式会社デンソー | スパークプラグ |
JP4730747B2 (ja) | 2007-03-29 | 2011-07-20 | 日本特殊陶業株式会社 | スパークプラグおよびその製造方法 |
JP5525454B2 (ja) * | 2008-01-28 | 2014-06-18 | フラム・グループ・アイピー・エルエルシー | 高い位置のねじ山の接地シールド |
JP2010267425A (ja) * | 2009-05-13 | 2010-11-25 | Ngk Spark Plug Co Ltd | スパークプラグ |
DE102009047055A1 (de) * | 2009-11-24 | 2011-05-26 | Robert Bosch Gmbh | Zündkerze für eine Verbrennungskraftmaschine |
DE102009055397A1 (de) * | 2009-12-30 | 2011-07-07 | Robert Bosch GmbH, 70469 | Zündkerze |
JP5134044B2 (ja) * | 2010-06-22 | 2013-01-30 | 日本特殊陶業株式会社 | 内燃機関用スパークプラグ |
JP4928626B2 (ja) | 2010-09-21 | 2012-05-09 | 日本特殊陶業株式会社 | スパークプラグ |
JP4874415B1 (ja) * | 2010-10-29 | 2012-02-15 | 日本特殊陶業株式会社 | スパークプラグ |
-
2013
- 2013-03-01 DE DE102013203566.7A patent/DE102013203566A1/de active Pending
-
2014
- 2014-02-21 BR BR112015020538-0A patent/BR112015020538B1/pt active IP Right Grant
- 2014-02-21 CN CN201480011515.XA patent/CN105009389B/zh active Active
- 2014-02-21 JP JP2015559472A patent/JP6186014B2/ja active Active
- 2014-02-21 EP EP14706033.9A patent/EP2962370B1/de active Active
- 2014-02-21 ES ES14706033T patent/ES2827958T3/es active Active
- 2014-02-21 WO PCT/EP2014/053451 patent/WO2014131705A1/de active Application Filing
- 2014-02-21 PL PL14706033T patent/PL2962370T3/pl unknown
- 2014-02-21 US US14/768,791 patent/US9819155B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2014131705A1 * |
Also Published As
Publication number | Publication date |
---|---|
US9819155B2 (en) | 2017-11-14 |
WO2014131705A1 (de) | 2014-09-04 |
CN105009389B (zh) | 2018-04-24 |
BR112015020538A2 (pt) | 2017-07-18 |
EP2962370B1 (de) | 2020-08-05 |
JP6186014B2 (ja) | 2017-08-23 |
CN105009389A (zh) | 2015-10-28 |
ES2827958T3 (es) | 2021-05-25 |
PL2962370T3 (pl) | 2021-01-11 |
JP2016508663A (ja) | 2016-03-22 |
BR112015020538B1 (pt) | 2021-11-30 |
US20160006220A1 (en) | 2016-01-07 |
DE102013203566A1 (de) | 2014-09-04 |
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