EP3642917A1 - Spark plug with multi-step insulator seat - Google Patents
Spark plug with multi-step insulator seatInfo
- Publication number
- EP3642917A1 EP3642917A1 EP18717344.8A EP18717344A EP3642917A1 EP 3642917 A1 EP3642917 A1 EP 3642917A1 EP 18717344 A EP18717344 A EP 18717344A EP 3642917 A1 EP3642917 A1 EP 3642917A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- insulator
- longitudinal axis
- seat
- housing
- inner seal
- 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 title claims abstract description 257
- 238000007789 sealing Methods 0.000 claims abstract description 140
- 238000002485 combustion reaction Methods 0.000 claims abstract description 20
- 230000007704 transition Effects 0.000 claims abstract description 9
- 230000008901 benefit Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000011835 investigation Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 239000004229 Alkannin Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003716 rejuvenation Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012549 training Methods 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
- H01T13/36—Sparking plugs characterised by features of the electrodes or insulation characterised by the joint between insulation and body, e.g. using cement
-
- 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
- H01T13/02—Details
-
- 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
- H01T21/00—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs
- H01T21/02—Apparatus or processes specially adapted for the manufacture or maintenance of spark gaps or sparking plugs of sparking plugs
Definitions
- the invention is based on a spark plug according to the preamble of claim 1.
- a spark plug is known for example from the D E 103 44 186 AI.
- a well functioning spark plug and its components have always had to meet a number of requirements, such as longevity, reliable ignition characteristics,
- Conditions such as As temperature and pressure in the combustion chamber, under which the spark plug must work reliably and for as long as possible, more extreme.
- the temperature and pressure conditions prevailing in the combustion chamber during operation of the engine particularly put the gas-tightness of the mounted spark plug to the test.
- FIG. 1 A solution for sealing the gap between the insulator and the housing is shown in FIG.
- the housing has on its inside a taper of the inner diameter in the direction brennraum workedem housing end. This taper is also referred to as a housing seat.
- the surface of the housing seat is inclined at an angle ⁇ with respect to the housing longitudinal axis or the spark plug longitudinal axis, which typically coincides with the housing longitudinal axis, ⁇ is typically in the range of 55 ° -65 °.
- the insulator also has a taper of its outer diameter in the direction of its combustion chamber end or its Isolatorfußes. This rejuvenation is called
- Isolator seat or referred to as classicalkehle.
- the surface of the insulator seat is inclined with respect to the insulator longitudinal axis or spark plug longitudinal axis, which typically coincides with the insulator longitudinal axis.
- the housing seat and insulator seat have a different inclination with respect to the spark plug longitudinal axis.
- the insulator seat rests on the housing seat, wherein an inner seal, often in the form of a sealing washer or a sealing ring, is arranged between the two seat surfaces.
- an inner seal often in the form of a sealing washer or a sealing ring, is arranged between the two seat surfaces.
- the axial sealing surface typically has a size of about 10mm 2 at an M12 spark plug. This sealing concept has proven itself for temperatures up to approx. 220 ° C and pressures up to approx. 22 bar in the combustion chamber.
- the higher tightening torque ensures that the housing extends in the area of the thread during assembly.
- the area of the thread is located on the inside of the housing of the housing seat. Due to the elongation of the housing reduces the biasing force with which the housing and the insulator are pressed together, whereby the inner seal is not strong enough between the housing and insulator is pressed, causing the surface pressure between the inner seal and insulator or housing and thus the Sealing surface is reduced and the sealing surface of the large prevailing in the combustion chamber pressures can no longer resist sufficiently, so that the spark plug is sufficiently gas-tight.
- the insulator seat has at least one stage having a first portion and at least a second portion, wherein the first portion and the second portions at an angle ⁇ of greater than 0 ° to each other and the first portion is parallel to the insulator longitudinal axis, the inner seal abutting this first portion so that a radial sealing surface forms on the insulator.
- the spark plug according to the invention has a housing, an insulator arranged inside the insulator, a ground electrode arranged on a combustion chamber-facing end side of the housing, the ground electrode and the center electrode being arranged such that the two electrodes have a spark gap form.
- the insulator has a longitudinal axis X along its longitudinal extent. This longitudinal axis may also be a mirror axis and / or axis of rotation for the insulator, for example when viewing the insulator in a section along the longitudinal axis.
- the insulator longitudinal axis X coincides with the assembled spark plug with the spark plug longitudinal axis and a housing longitudinal axis.
- the isolator can be divided along its longitudinal axis into three areas: insulator foot, insulator body and insulator head. The area that forms the combustion chamber end of the insulator is called insulator foot.
- the insulator head forms the combustion chamber-remote end of the insulator.
- the insulator body is arranged between insulator head and Isolatorfuß.
- the three areas often have different outer diameters, wherein the outer diameter can also vary within a range.
- the transitions between the areas are formed as shoulders or throats.
- the transition between the insulator body and Isolatorfuß is also referred to as zerokehle or insulator seat.
- the housing has on its inside a housing seat, on which the insulator rests with its insulator seat, wherein between the housing seat and the insulator seat, an inner seal is arranged, so that the inner seal, the housing seat and the insulator seat a Form sealing system.
- the insulator seat has at least one step, which has a first section and at least one second section, wherein the first
- Section and the second portions have an angle ⁇ of greater than 0 ° to each other and the first portion is parallel to the insulator longitudinal axis X, wherein the inner seal to abuts this first section, so that forms a radial sealing surface on the insulator. More specifically, the radial sealing surface forms between the first portion of the step in the insulator seat and the inner seal.
- the formation of a radial sealing surface has the advantage that the spark plug, despite the reduction of the biasing force between the housing and insulator, due to the housing elongation when screwing the spark plug in a cylinder head, a good
- the biasing force is a force having a large axial force component and a lower radial force component.
- the biasing force is affected.
- Another advantage is shown in the operation of the spark plug. Due to the higher temperatures during operation of the spark plug, the material of the inner seal expands as well as the other components of the spark plug. Investigations of Anmindering have shown that the inner seal in the axial direction has a greater thermal expansion than in the radial direction, that is, with increasing temperature during operation of the spark plug and the engine changes the force acting in the axial direction force ratio whereby the tightness of the axial sealing surface is reduced. By contrast, the force ratio acting in the radial direction is relatively unaffected by the thermal expansion of the inner seal and thus also the tightness at the radial sealing surfaces.
- axial force or force component the forces acting parallel to the longitudinal axis of the spark plug.
- radial force or force component the forces are meant that act perpendicular to the longitudinal axis of the spark plug.
- the acting forces can each be divided into an axial and a radial force component.
- a surface or a section is considered to be parallel or substantially parallel to the insulator longitudinal axis if the latter has a maximum angle of 10 ° to the insulator longitudinal axis.
- the radial sealing surface is considered to be any sealing surface that bears against a surface or portion that is substantially parallel to the insulator longitudinal axis, the housing longitudinal axis, or the spark plug longitudinal axis. Accordingly, all other sealing surfaces that abut a surface or portion that are perpendicular or at an angle to the insulator longitudinal axis, the housing longitudinal axis, or the spark plug longitudinal axis are axial sealing surfaces.
- the step on the insulator seat in addition to the radial sealing surface still has at least one axial sealing surface, in particular formed on the at least one second portion of the step.
- the total sealing surface is increased, resulting in a better overall tightness of the inner sealing system.
- there is still the effect that the axial sealing surface is increased, resulting in a better overall tightness of the inner sealing system.
- Sealing surface which is primarily influenced by the axial acting on the insulator, inner seal and housing forces, and the radial sealing surface, which is primarily influenced by the forces acting radially on insulator, inner seal and housing, of different
- Functionality can preserve when the functionality of the other sealing surface, for example, due to a decrease in the corresponding force component is reduced.
- the step has proven to be advantageous for the step to have a first section and two second sections, the first section being arranged between the two second sections. Together with the inner seal results in a radial
- Sealing surface which is arranged between two axial sealing surfaces. This has the advantage that the inner seal rests against the insulator seat on the complete surface of the first section of the step and thus forms the largest possible radial sealing surface on this first section. Furthermore, the combination of axial and radial sealing surfaces increases the overall sealing area and, by the angled arrangement of the first and second sections of the step on the insulator seat, prolongs the path that the gas must travel for a leak, thereby improving gas tightness
- the insulator seat has a plurality of stages, each having a first portion, which together with the
- Inner seal form a plurality of radial sealing surfaces. This will bring up the top described technical effects and benefits particularly good effect. In particular, even if, as in a development of this embodiment, the plurality of radial sealing surface are connected by respective axial sealing surface. In embodiments having a plurality of radial sealing surfaces on the insulator seat, there is a radial main sealing surface having at least one radial secondary sealing surface. Additionally or alternatively, there is an axial one for several axial sealing surfaces
- Main sealing surface with at least one axial secondary sealing surface on the insulator seat are the main sealing surface and secondary sealing surface by the size of their
- Sealing surface there is one radial and one axial main sealing surface and a plurality of secondary sealing surfaces, wherein the main sealing surface has the largest sealing surface between insulator and inner seal. Measured along the longitudinal axis of the insulator, a radial main sealing surface has the greatest length compared to the other radial ones
- a radial main sealing surface of radial secondary sealing surfaces along the insulator longitudinal axis is framed, wherein the radial sealing surfaces over axial
- Sealing surfaces are connected.
- To the radial main sealing surface can be an axial
- Main sealing surface to be arranged directly.
- a radial secondary sealing surface may, for example, also be formed on the insulator base and / or on the insulator body, i. the inner gasket protrudes beyond the insulator seat after deforming. This gives the advantage that the entire surface of the
- Isolator seat is used as a sealing surface, wherein the sealing surface is composed of sections of radial and axial sealing surfaces. Due to the stepped arrangement of the sealing surface of the leakage path for the gas is particularly large, whereby the spark plug keeps its gas tightness even at high gas pressures.
- the exact shape of the inner seal after the assembly of the spark plug and the elastic plastic deformation of the inner seal and the concomitant concrete training, such as number and arrangement of axial and radial sealing surfaces (number, arrangement) depends on various factors, such as gaps between insulator and Housing above and below the insulator seat, number of stages in the insulator seat, preload force with which the insulator is pressed in the housing or surface of the sealing contour. This also results in the possibility of the inner seal system by a To adapt attractive design of these factors to special loads and requirements, so as to optimize the spark plug for the particular application.
- the angle ß is the angle within the housing wall.
- an angle ßsdT of 115 ° to 125 ° results.
- Spark plug works the inner seal system according to the invention already when ß has a value of at least 80 °, and also works for values of ß up to 170 °.
- the value for ⁇ is preferably at least 90 ° and at most 160 °.
- the inner seal prior to assembly in section has a height h, measured parallel to the insulator longitudinal axis X, and a width d, measured perpendicular to the insulator longitudinal axis X. It has proved to be advantageous has been found that the ratio of width d to height h of the inner seal is at least 0.5, in particular at least 0.75.
- the inner seal is preferably one
- Solid such as a gasket or gasket, i. the
- Inner gasket is not a molded powder packing.
- the width of the inner seal is greater than the depth of the housing seat.
- the depth a g of the housing seat results as half the difference between the inner diameter c g of the housing above the housing seat, or in the direction of the combustion chamber side facing away from the housing, and the inner diameter b g of the housing below the housing seat, speak in the direction of the combustion chamber end of the housing.
- the depth a, of the insulator seat is analogous to half the difference between the outer diameter q of the insulator above the insulator seat, ie on the insulator body, and the
- the depth of the insulator seat a less than or equal to the depth of the housing seat a g .
- the radial sealing surface on the insulator seat has a height, measured parallel to the insulator longitudinal axis X, of at least 30%, in particular at least 36%, of the height h of the inner seal.
- Main sealing surface on the insulator seat has a height, measured parallel to the insulator longitudinal axis X, of at least 30%, in particular at least 36%, the height h of the inner seal.
- the radial secondary sealing surfaces on the insulator seat have a height, measured parallel to the insulator longitudinal axis X, of at least 1%, in particular
- the axial sealing surface it has proved to be advantageous if it has a width, measured perpendicular to the insulator longitudinal axis X, of at least 15%, in particular at least 20%, of the width d of the inner seal at the insulator seat.
- the axial main sealing surface on the insulator seat may have a width, measured perpendicular to the insulator longitudinal axis X, of at least 15%, in particular at least 20%, of the width d of the inner seal.
- the axial main sealing surface on the insulator seat may have a width, measured perpendicular to the insulator longitudinal axis X, of at least 15%, in particular at least 20%, of the width d of the inner seal.
- Secondary sealing surfaces on the insulator seat have a width, measured perpendicular to the insulator longitudinal axis X, of at least 1%, in particular at least 5%, of the width d of the inner seal.
- the inner seal and the housing it is possible for the inner seal and the housing to form an axial sealing surface on the housing seat and a radial sealing surface on the inner side of the housing. It has proved to be advantageous that the radial sealing surface on the housing has a height, measured parallel to the insulator longitudinal axis X, of at least 30%, in particular at least 36%, the height h of the inner seal.
- the insulator foot directly adjacent axial (minor) sealing surface on the insulator seat has in an advantageous development of the invention at least one width, which corresponds to the, in particular narrowest, gap width between the insulator and the insulator opposite the housing inner side directly on the insulator seat.
- the width of the adjacent to the Isolatorfuß axial (secondary) sealing surface also corresponds to at least the gap width between the insulator body and the opposite housing inside, if this gap has a greater width than the gap between insulator and housing inside.
- FIG. 1 shows an example of a spark plug
- FIG. 2 shows in detail the arrangement of the housing seat, the insulator seat and the inner seal of a spark plug according to the prior art
- Figure 3 shows in detail the insulator seat with step, the inner seal and the housing seat of the spark plug according to the invention prior to assembly
- Figure 4 shows in detail the insulator seat with step, the inner seal and the housing seat of the spark plug according to the invention after assembly
- Figure 5 shows the insulator seat with stage for a spark plug according to the invention
- FIG. 6 shows an example of a housing seat for a spark plug according to the invention
- the spark plug 1 comprises a housing 2.
- an insulator 3 is inserted.
- the housing 2 and the insulator 3 each have a bore along their longitudinal axis.
- the longitudinal axis of the housing 2, the longitudinal axis X of the insulator 3 and the longitudinal axis of the spark plug 1 coincide.
- a center electrode 4 is inserted in the insulator 3.
- a connecting bolt 8 extends into the insulator 3.
- a connecting nut 9 is arranged on the connecting bolt 8, via which the spark plug 1 can be electrically contacted with a voltage source.
- the connecting nut 9 forms the combustion chamber-remote end of the spark plug 1.
- the resistance element 7 connects the center electrode 4 in an electrically conductive manner to the connection bolt 8.
- the resistance element 7 is, for example, as a layer system comprising a first contact chip, a
- Resistance elements differ in their material composition and the resulting electrical resistance.
- the first contact chip and the second contact chip can have a different or a same electrical resistance.
- a ground electrode 5 is arranged electrically conductive on the combustion chamber-facing end face. Between the ground electrode 5 and the center electrode 4, a spark is generated.
- the housing 2 has a shaft. On this shaft are a polygon 21, a
- the thread 22 serves for
- the insulator 3 is typically divided into three areas: insulator foot 31, insulator body 31 and insulator head 33. The three areas are different, for example
- the Isolatorfuß 31 is the combustion chamber-facing end of the insulator 3. Within the Isolatorfußes 31, the center electrode 4 is arranged.
- Insulator base 31 is usually arranged completely or at least over most of its length, measured parallel to the spark plug longitudinal axis or insulator longitudinal axis X, within the housing 2.
- the insulator foot 31 has the smallest outer diameter on the insulator 3.
- Adjacent to the insulator foot 31, the insulator body 32 is arranged, which is generally completely enclosed by the housing 2.
- the insulator body 32 has a larger one
- the transition between insulator 31 and insulator body 32 is formed as a shoulder or throat. This transition is also referred to as zerokehle or insulator seat 35.
- the insulator head 33 adjoins the combustion chamber-remote end of the insulator body 32 at this and forms the combustion chamber-remote end of the insulator 3.
- the insulator head 33 projects out of the housing 2.
- the outer diameter of the insulator head 33 lies between the outer diameters of insulator foot 31 and insulator body 32, the regions typically not having a constant outer diameter over their length, but the outer diameter may vary.
- the housing 2 has on its inside a seat 25.
- the insulator lies with its shoulder or insulator seat 35 on the housing seat 25. Between the insulator seat 35 and the housing seat 25, an inner seal 10 is arranged.
- the region 30 of the housing seat 25 and the insulator seat 35 is marked in the figure 1 by a circle and is described in more detail in the following figures 2 to 6.
- Figure 2 shows in detail the area 30 with the housing seat 25, insulator seat 35 and
- the surface of the insulator seat 35 is given by the transition from the insulator 31 to the insulator body 32, in which continuously increases the outer diameter.
- Figure 3 shows in detail the area 30 with the housing seat 25, the insulator seat 35 and the inner seal 10 prior to mounting of the insulator 3 in the housing 2 according to the invention.
- the inner seal 10 rests on the housing seat 25. Before mounting the insulator 3, the inner seal has a height h, measured parallel to the longitudinal axis of the spark plugs or insulator longitudinal axis X, and a width d, measured perpendicular to the longitudinal axis of the
- the insulator seat 35 which forms the transition between the insulator foot 31 and the insulator body 32, has a step in this example.
- the level can be divided into three sections.
- a first section 3510 has a surface which is parallel to the insulator longitudinal axis X, thus also this first section 3510 is parallel to the insulator longitudinal axis X.
- the other two sections 3520 also referred to as the second section, are at an angle to the first section 3510 ⁇ inclined. In this case, for example, every second section 3520 to the first section 3510 or to the insulator longitudinal axis X has a different angle ⁇ .
- various second portions 3520 may have the same angle ⁇ to a first portion 3510 and insulator longitudinal axis X, respectively.
- Figure 4 shows in detail the area 30 with the housing seat 25, the insulator seat 35 and the inner seal 10 after mounting the insulator 3 in the housing 2 according to the invention.
- a force By mounting the insulator 3 in the housing 2 acts on the inner seal 10, a force, whereby the inner seal 10 is deformed and radial sealing surfaces 251, 351 a, 351 b, 351 c and axial sealing surfaces 252, 352 a, 352 b, 352 c on the insulator 3 and Insulator seat 35 and housing 2 and housing seat 25 form.
- Radial sealing surfaces 351a, 351b always form between the inner seal 10 and the insulator longitudinal axis X parallel surfaces of the insulator 3 or the housing 2.
- a slight inclination i. have an angle of less than 10 ° to the longitudinal axis of the spark plugs or the insulator longitudinal axis X.
- the insulator seat 35 has in this embodiment two stages and thus two first portions 3510a, 3510b and a plurality of second portions 3520a, 3520b, 3520c. At the first sections 3510a, 3510b, radial sealing surfaces 351a, 351b are formed.
- a radial main sealing surface 351a is formed on the first section 3510a and a radial secondary sealing surface 351b forms on the other first section 3510b.
- one major sealing surface and multiple minor sealing surfaces are formed, with the main sealing surface enclosed by adjacent minor sealing surfaces.
- the main sealing surfaces is typically the largest surface.
- axial sealing surfaces 352a, 352b also form on the insulator seat on the second sections 3520a, 3520b.
- the axial sealing surfaces 352a, 352b it is also possible to differentiate between the main and secondary sealing surfaces. Due to the stepped shape of the insulator seat alternate radial and axial sealing surfaces. It is not excluded that radial sealing surfaces also form on the insulator base 31 or insulator body 32, for example the radial sealing surface 351c on the insulator base 31.
- the axial secondary sealing surface 352 b which adjoins the Isolatorfuß 31, should be wider than the gap width e between Isolatorfuß 31 and housing 2, ie below the insulator seat 35, and / or wider than the gap width f between the insulator body 32 and housing 2, ie above of the insulator seat 35.
- Figure 5 shows in more detail the insulator seat 35 with two stages.
- the insulator longitudinal axis X can be seen.
- the two steps on the insulator seat 35 each have different angles ⁇ between their first and second sections 3510, 3520a, 3520b.
- the angle ⁇ has a value of 90 ° to 175 °.
- the depth a of the insulator seat 35 results from half the difference of the diameter b, the insulator foot 31 and the diameter q am
- the housing seat 25 is shown in detail.
- the depth a g of the housing seat 25 results from half the difference of the inner diameter of the housing at the level of
- Isolatorfußes and the housing inner diameter above the housing seat c g are measured perpendicular to the housing's longitudinal axis.
- the housing seat 25 is inclined at an angle ß to the housing longitudinal axis, ß has a value of 90 ° to 160 °.
- ⁇ can also have values smaller than 90 °, but the manufacturing process is then more difficult and the production costs higher.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Spark Plugs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017210235.7A DE102017210235A1 (en) | 2017-06-20 | 2017-06-20 | Spark plug with multi-level isolator seat |
PCT/EP2018/059262 WO2018233890A1 (en) | 2017-06-20 | 2018-04-11 | Spark plug with multi-step insulator seat |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3642917A1 true EP3642917A1 (en) | 2020-04-29 |
EP3642917B1 EP3642917B1 (en) | 2021-09-01 |
Family
ID=61966001
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18717344.8A Active EP3642917B1 (en) | 2017-06-20 | 2018-04-11 | Spark plug with multi-step insulator seat |
Country Status (8)
Country | Link |
---|---|
US (1) | US11165226B2 (en) |
EP (1) | EP3642917B1 (en) |
JP (1) | JP6894537B2 (en) |
CN (1) | CN110741518B (en) |
DE (1) | DE102017210235A1 (en) |
ES (1) | ES2898751T3 (en) |
RU (1) | RU2765036C2 (en) |
WO (1) | WO2018233890A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2023008033A (en) * | 2021-07-05 | 2023-01-19 | 株式会社デンソー | Ignition plug |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2250355A (en) * | 1937-06-08 | 1941-07-22 | Bruck Josef | Packing for insulators in sparking plugs |
JPS6139880U (en) | 1984-08-15 | 1986-03-13 | トヨタ自動車株式会社 | Spark plug for internal combustion engine |
RU2055432C1 (en) | 1990-01-19 | 1996-02-27 | Стаценко Иван Николаевич | Spark-plug |
DE10344186B4 (en) | 2003-09-24 | 2005-10-13 | Robert Bosch Gmbh | spark plug |
RU2295812C1 (en) | 2005-10-12 | 2007-03-20 | Гаджикадир Алиярович Ибадуллаев | Spark plug for internal combustion engine |
JP4928626B2 (en) | 2010-09-21 | 2012-05-09 | 日本特殊陶業株式会社 | Spark plug |
EP2789064B1 (en) | 2011-12-09 | 2018-04-25 | Federal-Mogul Ignition Company | Improvements to insulator strength by seat geometry |
JP5721680B2 (en) * | 2012-09-27 | 2015-05-20 | 日本特殊陶業株式会社 | Spark plug |
DE102015200407A1 (en) | 2015-01-14 | 2016-07-14 | Robert Bosch Gmbh | Spark plug with plastic sleeve |
JP6262796B2 (en) | 2015-06-12 | 2018-01-17 | 日本特殊陶業株式会社 | Spark plug manufacturing method and spark plug |
DE102016200430A1 (en) * | 2016-01-15 | 2017-07-20 | Robert Bosch Gmbh | Spark plug with a notch or groove in the insulator or in the housing |
-
2017
- 2017-06-20 DE DE102017210235.7A patent/DE102017210235A1/en not_active Withdrawn
-
2018
- 2018-04-11 ES ES18717344T patent/ES2898751T3/en active Active
- 2018-04-11 EP EP18717344.8A patent/EP3642917B1/en active Active
- 2018-04-11 US US16/622,592 patent/US11165226B2/en active Active
- 2018-04-11 JP JP2019568023A patent/JP6894537B2/en active Active
- 2018-04-11 WO PCT/EP2018/059262 patent/WO2018233890A1/en unknown
- 2018-04-11 CN CN201880041157.5A patent/CN110741518B/en active Active
- 2018-04-11 RU RU2020100468A patent/RU2765036C2/en active
Also Published As
Publication number | Publication date |
---|---|
RU2765036C2 (en) | 2022-01-24 |
EP3642917B1 (en) | 2021-09-01 |
JP2020522866A (en) | 2020-07-30 |
DE102017210235A1 (en) | 2018-12-20 |
CN110741518B (en) | 2021-11-12 |
CN110741518A (en) | 2020-01-31 |
US11165226B2 (en) | 2021-11-02 |
ES2898751T3 (en) | 2022-03-08 |
BR112019027042A2 (en) | 2020-06-30 |
JP6894537B2 (en) | 2021-06-30 |
WO2018233890A1 (en) | 2018-12-27 |
RU2020100468A3 (en) | 2021-07-20 |
US20210151958A1 (en) | 2021-05-20 |
RU2020100468A (en) | 2021-07-20 |
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