WO2010066212A1

WO2010066212A1 - Glowing plug

Info

Publication number: WO2010066212A1
Application number: PCT/DE2008/002000
Authority: WO
Inventors: Martin Allgaier; Rainer Hain
Original assignee: Beru Ag
Priority date: 2008-11-27
Filing date: 2008-12-04
Publication date: 2010-06-17

Abstract

Glowing plug, comprising at least one housing body part (X), a substantially axial ceramic heater/glowing pin (1-6), which is arranged in a tubular element such that the glowing tip of the heater (1-6) protrudes from the end of the sleeve, wherein the end of the sleeve opposite from the glowing tip and the end of the heater (4) opposite from the end of the glowing tip are connected to a contact ring (II), and at least one glowing current terminal (VII), wherein the glowing current terminal (VII) is connected on one side to the end of the heater that is connected to the contact ring (II).

Description

glow plug

The invention relates to a glow plug and a method for producing a glow plug.

Such glow plugs are known, e.g. from EP 1 239 222 B1. Furthermore, such glow plugs from JP 2002 243 150 A and JP 2002 257 341 A and JP 59 001 927 A are known Moreover, such ceramic glow plugs with a metal outer cylinder from DE 3342 753 and DE 34 34 762 C2 or DE 613 426 or US Pat. No. 5,880,432 has become known to the public.

In such glow plugs is disadvantageous that the tips of Keramrkheizers cancel and cause high consequential damage, the production of such glow plugs is complicated and expensive.

Occasionally, ceramic pins are knocked off. The cause is not clear so far. It is noticeable, however, that all defective parts have an unevenly thick layer of solder.

Some parts show a greater runout after use in the engine than the condition of the delivery. In general, concentricity deviation and leak tightness of the sounding are topics that are discussed in the professional world. The problems could not be solved yet. When mounting the variants with docking tube, e.g. one-piece sleeve from the sensor module to before in the annealing area, a cumbersome handling of the components falls on. The logistical effort increases when using these components with each length variant, since the use of Mehrverwenduπgsteilen is gone in the early assembly stage. The cold-formed components used, e.g. the contact ferrule or sleeve exhibits warp constructions after exposure to heat, such as heat. after soldering or operation in the engine.

The object of the invention is to improve a ceramic Gfühkerze or Druckmessglühkerze in their manufacturability and durability. The object is achieved by a glow plug according to claim 1 and a method according to claim 9.

According to the invention, it is advantageous here to design the sleeve, contact ring and, optionally, the extension as separate components, this results in the possibility of producing the components from different materials. Each component consists of the material optimized for the function. Functional risks through function combinations are minimized. When a short component is soldered, the surface is minimized and air can adhere, resulting in clean soldering. The sleeve and the extension can be made separately from each other and from the soldering area of the functional unit of simple pipe sections. The contact ring with solder buffer on the cone of the contact ring and with solder buffer on the shaft of the contact ring gives the solder room to collect at the Überαanα to the cone.

Another inventive advantage is the production of products with the simplest possible components, preferably in several variants - short or long, thin or thick - which can be produced for the particular needs of customers, but without increased logistical effort. The use of the simplest possible components, leads directly to cost-effective parts to be produced. The use of several smaller components that avoid multifunctionality and thus complex functionality interactions. Further advantageous developments can be found in the dependent claims.

More accurate concentricity of the components, even of the primary materials or manufacturing processes of the components, leads to a more precise concentricity. The inventive combination of simpler components with more exact geometry with manageable assembly processes, leads to a more precise and inexpensive workpiece high durability. The simplification of the components leads to the reduction of the functional overlays in the individual component.

It is e.g. possible to use different materials in certain areas. Thus, the high-temperature-resistant material towards the glow pin tip and in the soldering a material with adapted

Thermal expansion coefficient and in the supply line a cheaper steel can be used. These components can be procured more easily, the tendency to crack in the ceramic around the solder joint is reduced.

There is a reduction of the surface and avoidance of encapsulated cavities on the components that are soldered. Only short sleeves are soldered to the ceramic. These can easily be flowed around by argon, the solder being kept away from any influence of air and oxidation products from evaporating contaminants. Safe tight soldering is the result. Processing of the contact ring after soldering improves the assembly capability of the components and reduces run-out deviations on the product. In this case, the geometry of the contact ring can be changed so that all connection points are designed optimized for the connection technology

The invention is explained in more detail below with reference to the drawings, show in the drawings

1 shows a section through a ceramic pressure measuring annealing

Figure 2 heater or Gühühvarianvarianten

Figure 3 contact ring variants

Figure 4 Innenpofkopfvarianten

Figure 5 H Olsen variants

Figure 6 Veriängerungsvarianten

Figure 7 heater or Glühstiftvariante with contact ring and inner pole head

Figure 8 heater or Glühstiftvariante with contact ring and Innenpolkopf

Figure 9 heater or Glühstiftvariante with contact ring and tnnenpolkopf

FIG. 10 Heater or glow plug variant with contact ring and inner pole head

FIG. 11 Heater or glow plug variant with contact ring and inner pole head

Figure 12 heater or Glühstiftvariante with contact ring and fnnenpolkopf

Figure 13 Heater or Glühstiftvariante with contact ring and inner pole head

Figure 14 Heater or glow plug variant with contact ring and inner pole head and sleeve Figure 15 Heater or glow plug variant with contact ring and inner pole head and sleeve Figure 16 Heater or glow plug variant with contact ring and tan pole head and sleeve Figure 17 Heater or glow plug variant with contact ring and inner pole head and sleeve Figure 18 Heater or Glühstiftvariante with contact ring and Innenpolkopf and sleeve Figure 19 Heater or Glühstiftvariante with contact ring and Innenpolkopf and sleeve Figure 20 Heater or Glühstiftvariante with contact ring and Innenpofkopf and sleeve Figure 21 Heater or glow plug variant with contact ring Figure 22 Heater or glow plug variant with contact ring and inner pole head and sleeve Figure 23 Heater or glow plug variant with contact ring and inner pole head and hips Figure 24 Heater or glow plug variant with contact ring and inner head and sleeve Frgur 25 Heater or tempering pin variant with contact ring and inner npolkopf and sleeve Figure 26 Heater or pencil holder variant with contact ring and inner pole head and sleeve Figure 27 Heater or glow plug variant with contact ring and inner pole head and sleeve Figure 28 Heater or glow plug variant with contact ring and inner pole head and sleeve Figure 29 Heater or glow plug variant with contact ring and tinned pole head and hips Figure 30 Heater or glow plug variant with contact ring and antenna head and sleeve Figure 31 Heater or Gfühsttftvariaπte with contact ring and inner pole head and sleeve Figure 32 Heater or Gfühstiftvariante with contact ring and Innenpoikopf and sleeve Figure 33 Heater or Glühstiftvariante with contact ring and inner pole head and sleeve Figure 34 Heater or Glühstiftvariante with contact ring and inner pole und Hülse Figure 35 glow plug with contact ring, inner pole head, sleeve, feed and

Glühstromanschluss Figure 36 Glow pin with contact ring, inner pole head, sleeve, feed and

Glühstromanschluss Figur 37 Glühstift mit Kontaktring, Innenpoikopf, Sleeve, Zuleiter,

Gtühstromanschtuss and extension Figure 38 glow plug with contact ring, inner pole head, sleeve, feed,

Glow plug connection and extension

Figure 39 a. Section through a ceramic glow plug

Table 1 shows the different variants of categories

The ceramic glow plug I from FIG. 1 has at one end the glow tip 1 of the ceramic glow plug, which is connected to the connecting rod of the ceramic glow plug 3 via the connector of the ceramic glow plug 2. The connecting cone of the ceramic glow plug 3 is divided into connecting cones for contact ring on the ceramic glow plug 4, insulator area on the connecting cone of the ceramic glow plug 5 and the connecting cone for Inπenpolkαpf the ceramic glow plug 6. The cone for the contact ring on the ceramic glow plug 4 represents the outer contact, the connecting cone for the indoor pot on the ceramic glow plug 6 the inner . on the connecting cone for the contact ring on the ceramic glow plug 4 is seated, the contact ring II, on the connecting cone for the inner pole to the ceramic glow plug 6 of the inner pole U \. in Innenpofkopf Ul of the feeders inserted IV, the m ^'rt this is connected. on the Kontaktπng It will be the sleeve V, which in an alternative AusgestaFtung made of high temperature resistant metal such as Inconel and the extension VI welded. In this case, sleeve V and extension VI are positioned to each other. On Zuleiter IV depends on the Glühstromanschluss VII, which in turn is connected to the sensor element with Steckanschfuss VIIt. On the extension Vl of the damping ring IX is mounted. About this structure (heating rod), the body upper part X is mounted and connected to the sensor element VII. The bellows Xl is attached to the body top X and sleeve V and seals the two parts against each other and holds them radially in position. The body bottom XfI is attached to the body top X, shuts off the whole, and makes it compatible with the glow plug.

The Glühstromanschluss VII has a weld hole 19 in the joining region 18 of the Glühstromanschluss in which the Schweißergre is directed to the surface of the feeder IV. Thus, the material of the Glühstromanschluss VII is secondarily melted by the melt of the feeder IV and not overcooked. Into the conical area of the inner pole head III, a solder roll of the ceramic wetting active solder is pushed into position. In this pair of parts of the ceramic glow plug is inserted and pressed. This combination is placed in a precisely manufactured device. From above leads and presses a device, the two components to be soldered to each other in position. The direct environment of the components is hermetically sealed, for example, a glass sleeve is placed over the device from below argon is introduced into the cavity, the argon escapes at high speed through small openings (1mm holes in the lid, or a labyrinth around the gripper) to short pre-flow time, the sleeve, which may consist of Inconel, heated until the entire solder has wetted the two components. In the next operation, the resulting component and the contact ring are handled in a similar manner. For this purpose, a matching Lotwickel is positioned in the contacting ring, the combination compressed, flows around with argon, heated and soldered. The resulting contacted glow plug is a multiple use part. It can be 'mechanical supplements ^{' used} as an igniter in burners, Ffammglühkerzen and holders. Provided with a protective sleeve for the ceramic pin against coking and a Innenpolverlängerung, it can be added to a Keramikgfühkefze for high-speed self-igniting engines, or be installed with Zuleit IV and an extension Vl to a heating element for a Druckmessgtühkerze. For this purpose, sleeve V and extension Vl are clamped in a device. The contacted glow plug is inserted so that it is positioned between them when positioning the sleeve and extension. The device now positions sleeve and extension axis accurate and pushes the components into each other. The components are welded together while being rotated with the laser. The resulting heating rod is straight and is known as sensor element with Steckaπschluss, damping ring, body shell, bellows and Körperuntertei! eg mounted to a CPSG.

In Figure 2, three different heater or glow plug variants are disclosed. The variant Ia is designed substantially cylindrical. Variant Ib has a turned-tip. FIG. 3 shows four different contact ring variants Ha, Uv, Hc and Hd. In FIG. 4, four variants of inner pole heads IIIa, illb, IHc, IHd and IHe are disclosed. Seven different sleeve shapes Va, Vb, Vc, Vd, Ve, Vf and Vg are shown in FIG. Extension variants VIa, Vib, Vic, Vid and Vie are disclosed in FIG.

A butt for laser welding is disclosed in the figures S _r 9, 10, 14, 18, 22, 26, 29 and 32nd Figure 7 shows a cylindrical glow plug without sleeve with contact ring Hb and inner pole III. FIG. 9 shows a cylindrical glow plug without sleeve with contact ring Hd and inner pole head F1 and solder buffer on the shaft of the inner pole head 10. FIG. 10 shows a heater or glow pencil array with contact ring H and inner pole head IH shown, wherein the glow plug has a reduced diameter tip with so-called Andrehung. Further variant figures are explained in Table 1. Fig.35: A part of Table I ₁ here as Beispie! Fig.23, the feeder in the form of a pin, the Glühstrohmanschluss with a hole for laser welding.

FIG. 36 shows an example part from FIG. 23, wherein the supply conductor IV is designed in the form of a cable which is arranged on the glow-current connection VII realized as a sleeve. 23, the supply conductor is in the form of a cable, the Glühstromanschluss is designed with a collar, for later encapsulation in Sensσrgehäuse and for extension as a simple pipe section with Anreduzierung / retraction 17th

FIG. 38 shows the device from FIG. 37, but with an extension as tube section with rotation 17 and bore for the production of joining region 16. FIG. 39 shows a glow plug which has the following elements ceramic glow pencil I, contact ring II, interior spot head III , Zuleiter IV, sleeve V, Glühstromanschluss VII and designed as a housing body upper part X and a Körperunterteii XII. Between the housing and the sleeve V, a bellows-like seal is arranged. At the glow tip t opposite end of the glow plug a provided for mounting in the cylinder head hex 20 is arranged, by means of which one turns the glow plug on the arranged on its lateral surface thread 21 in the Zyliπderkopf.

Reference list

I. Ceramic glow plug

Ii. Kontaktrϊng

III. lnnenpolkopf

IV. Suppliers

V. sleeve

Vl. renewal

VII. Electricity supply

V L II. Sensor element with plug connection

IX. damping ring

X. Body shell

Xl. bellow

XIL body bottom

1. Glow tip of the ceramic glow plug

2. Supply of the ceramic glow plug

3. Connection cone of the ceramic glow plug

4. Connection cone for contact ring on ceramic annealing

5. Insulator area at the plug-in cone of the ceramic glow plug

6. Connection cone for Irvnenpolkopf the ceramic glow plug

7. Lot buffer on the cone of the contact ring

8. Lot buffer on the shaft of the contact ring

9. solder buffer on the cone of the inner pole head

10. Lotpuffer on the shaft of tnnenpolkσpfes

11. Filling hole for feeder at inner pole head

12. Narrowed diameter on the sleeve

13. Tapered wall thickness on the sleeve

14. Original wall thickness of the sleeve

15. Joining area on the sleeve to the contact ring

16. Join the extension to the contact ring

17. Guide section for damping ring on the extension

18. Joining area at the glow connection

19. Welding hole at Glühstromanschluss

20th hex

21. Thread

Table 1

Claims

claims

A glow plug comprising at least one main ceramic heater / glow plug (1-6) disposed in a tubular member such that the glow plug of the heater (1-6) is located in front of the sleeve end protruding, wherein the opposite end of the Giuhspitze sleeve end and the Glühspttze opposite heater end (4) with a contact ring (H) sfnd and at least one Glühstromanschtuss (VH), wherein the Glühstromanschfuss (VU) on one side with the with the contact ring (II) connected heater end is connected.

2. glow plug according to claim 1, characterized in that it comprises at least one extension).

3. glow plug according to claim 1 or 2, characterized in that it comprises at least one pressure measuring device (Vilf).

4. Gfühkerze according to one or more of the preceding claims, characterized in that it comprises at least one Innenpαlkopf (li () and / or a supply conductor (IV).

5. Glow plug according to one or more of the preceding claims, characterized in that it comprises at least efnen damping ring (IX).

6. Giühkerze according to one or more of the preceding claims, characterized in that ste has at least one pressure-tight seal (Xl), in particular between the housing and sleeve (V) and / or contact ring (Ii) and / or extension (VI).

7. Glow plug according to one or more of the preceding claims, characterized in that the pressure-tight seal (Xl) is designed FaHenbalgartig.

8. Glow plug according to one or more of the preceding claims, characterized in that the housing (X, XfI) is designed in two parts.

9. A method for producing a glow plug, comprising the following steps:

• Attaching a contact ring (II) to a ceramic heater (1 -6) as well as

• Attaching a glow current connection (VU) to said heater (1-6)

• producing at least one joint connection between contact ring (II) and heater and between contact ring (II) and flow connection (VlI)

• Sliding a sleeve (V) on said heater and

• producing at least one joint connection between contact ring (II) and sleeve (V)

• Vef build in a housing (X), which in particular has a thread on the outer circumference and at least one Atriebenvietkant K)

10. A method for producing a glow plug, comprising the following steps:

• Attaching a contact ring (II) to a ceramic heater (1-6) as well as

• Attaching a glow current connection (VU) to said heater (1-6)

• producing at least one joint connection between contact ring (II) and heater and between contact ring (H) and annealing current flange (VII)

• Sliding a Hüise (V) on said heater and

• Installation in a housing (X) ₁ having a pressure measuring device (VIIl).