IT8224415A1

IT8224415A1 - Ignition coil for internal combustion engines

Info

Publication number: IT8224415A1
Application number: IT1982A24415A
Authority: IT
Original assignee: Bosch Gmbh Robert
Priority date: 1981-11-25
Filing date: 1982-11-24
Publication date: 1984-05-24
Also published as: IT1154587B; IT8224415A0; DE3146624A1

Description

DOCUMENTAZIONE DOCUMENTATION

RILEGATA BOUND

"Bobina di accensione per motori endotermici" "Ignition coil for internal combustion engines"

Riassunto Summary

La bobina di accensione possiede una membrana (19), che ? fissata nella custodia (10) e sulla quale tramite un elemento intermedio (16) agisce una molla di pressione 20 elicoijdale, laddove la molla di pressione (20) elicoidale si appoggia sul fondo (13) di una custodia (12) della membrana. L'intero vano interno (35) della "bobina di accensione ? riempito di un olio per trasformatori che/sottopressione. The ignition coil has a membrane (19), which? fixed in the housing (10) and on which a helical pressure spring 20 acts by means of an intermediate element (16), where the helical pressure spring (20) rests on the bottom (13) of a housing (12) of the membrane. The entire interior compartment (35) of the "ignition coil is filled with a transformer oil which is under pressure.

Stato della tecnica L'invenzione parte da una bobina di accensione per motori endotermici del genere della rivendicazione principale. E' nota ima bobina di accensione di tale tipo, in cui il fondo della custodia a forma di marmitta compensa la variazione di volume del liquido isolante dipendente dalla temperatura. Per conseguire in particolare ?in? perfetta compensazione soprattutto la forma del fondo e lo spessore parietale della lamiera di acciaio impiegata dovranno essere esattamente accordati fra di loro. Nonostante il sufficiente accordo questo tipo di bobine di accensione non ? soddisfacente, specialmente nel caso-., di condizioni di esercizio estreme. State of the art The invention starts from an ignition coil for internal combustion engines of the kind of the main claim. An ignition coil of this type is known, in which the bottom of the muffler-shaped housing compensates for the temperature-dependent volume variation of the insulating liquid. To achieve specifically? In? perfect compensation, especially the shape of the bottom and the wall thickness of the steel sheet used must be exactly matched to each other. Despite sufficient agreement this type of ignition coils do not? satisfactory, especially in the case of extreme operating conditions.

Vantaggi dell'invenzione Advantages of the invention

Con la bobina di accensione/becondo l'invenzione viene sostanzialmente risolto il problema esposto con riferimento all'attuale stato della tecnica e si ottiene una sufficiente temperatura di esercizio in un intervallo di temperatura di approssimativamente meno 30 fino a pi? 0^ S^adi Celsius. Inoltre non ? limitata la posizione di montaggio della bobina di accensione, il che costituisce un sostanziale vantaggio soprattutto considerando le ristrette condizioni di spazio nel vano motore With the ignition coil / second, the invention substantially solves the problem set forth with reference to the current state of the art and a sufficient operating temperature is obtained in a temperature range of approximately minus 30 to plus. 0 ^ S ^ adi Celsius. Also not? limited mounting position of the ignition coil, which is a substantial advantage especially considering the limited space conditions in the engine compartment

Vantaggiosi sviluppi ulteriori dell'invenzione sono descritti nelle sottorivendicazioni. Con l'esecuzione della bobina di accensione secondo la rivendicazione 2 ed inoltre se condo la rivendicazione 3 si realizza una disposizione di membrana di semplice fabbricazione e di sicuro effetto. Se la bobina di accensione viene ulteriormente sviluppata con le caratteristiche della rivendicazione 4, si ottiene in tal modo un opportuno fissaggio della membrana e del nucleo di ferro neiJLa custodia. Advantageous further developments of the invention are described in the subordinate claims. With the construction of the ignition coil according to claim 2 and furthermore according to claim 3, a membrane arrangement of simple manufacture and of sure effect is realized. If the ignition coil is further developed with the characteristics of claim 4, a suitable fixing of the membrane and the iron core in the case is thus obtained.

Pei* fissare in direzione assiale il nucleo di ferro, dotato dei due avvolgimenti, e per attuare la dpreTsa^ di contatto elettrica, viene proposto un ulteriore sviluppo secondo la rivendicazione 5* Una schermatura perfetta delle por-^ zioni terminali scoperte dell'avvolgimento seconda-? rio viene ottenuta con le caratteristiche della rivendicazione 6. In order to fix the iron core, equipped with the two windings in the axial direction, and to implement the electrical contact method, a further development is proposed according to claim 5. -? rio is obtained with the features of claim 6.

Se sul coperchio 3 vengono previsti duomi di connessione, per prevedere o soltanto uno oppure due attacchi per alta tensione, allora non e necessaria alcuna disposizione supple-r mentare per un'eventuale protezione contro lo scop-jpio. Una protezione di sicurezza nei confronti della chiusura di massa del nucleo di ferro si ottiene quando la bobina viene eseguita secondo la rirendicazione 8 j. inoltre in tal modo e possibile ridurre la rumorosit? del traferro. Un fissaggio, sicuro sotto tutte le condizioni di esercizio, delle due bobine sul nucleo di ferro viene ottenuto con le caratteristiche della rivendicazione 9V?Con l'ulteriore sviluppo della bobina secondo la rivendicazione 11 e inoltre con la rivendicazione 12 il nucleo di ferro ? fissato univocamente nella custodia. La caratteristica della rivendicazione 15 nel caso di scoppio permette la perfetta fuoriuscita dell'olio per trasformatori. If connection domes are provided on the cover 3, to provide either only one or two high voltage connections, then no additional arrangement is necessary for any protection against blowout. A safety protection against the ground closure of the iron core is obtained when the coil is made according to the redemption 8j. moreover, in this way it is possible to reduce the noise? of the air gap. A secure fixing under all operating conditions of the two coils on the iron core is obtained with the characteristics of claim 9V? With the further development of the coil according to claim 11 and furthermore with claim 12 the iron core? fixed uniquely in the case. The characteristic of claim 15 in the case of bursting allows the perfect escape of transformer oil.

Con la rivendicazione 14 viene indicato come va fissato semplicemente l'avvolgimento primario sul nucleo di ferro. In particolare le due molle a lamina sono situate in fessure 55 del ^&rpo 40 della "bobina e per effetto della pressione sull'ala centrale fissano il corpo della bobina in direzione assiale e radiale. Claim 14 indicates how the primary winding is simply to be fixed on the iron core. In particular, the two leaf springs are located in slots 55 of the coil 40 and by effect of the pressure on the central wing they fix the coil body in axial and radial direction.

Con l'ulteriore sviluppo secondo la rivendicazione 15 risulta possibile preassegnare la posizione del corpo della bobina secondaria, per cui esso mediante molla di pressione elicoidale viene mantenuto premuto sulla superficie interna del corpo della obina primaria ed in particolare permette la presa di contatto sul lato opposto? Inoltre si ottiene il vantaggio che il diametro esterno della flangia della bobina primaria e del corpo della bobina secondaria sono allineati. With the further development according to claim 15 it is possible to preassign the position of the secondary reel body, whereby it is kept pressed on the internal surface of the primary reel body by means of a helical pressure spring and in particular allows contact to be made on the opposite side ? Furthermore, the advantage is obtained that the outer diameter of the flange of the primary coil and the body of the secondary coil are aligned.

Un isolamento supplementare del?-1'intero avvolgimento ? ottenuto con la rivendicazione 16. An additional insulation of the? -1'whole winding? obtained with claim 16.

Con la rivendicazione 1? viene indicata una semplice soluzione per permettere semplicemente e sicuramente il movimento dell'olio per i trasformatori dipendente da variazioni di temperatura With claim 1? a simple solution is indicated to allow simply and surely the movement of the oil for the transformers depending on temperature variations

Disegno Drawing

Un esempio di realizzazione del--l'invenzione ? rappresentato nel disegno ed illustrato pi? dettagliatamente nella descrizione della figura. L'unica figura mostra una bobona di accensione per motori endotermici in rappresentazione prospettica? parzialmente sezionata? ed in scala di misura ingrandita. An example of the realization of the invention? represented in the drawing and illustrated pi? in detail in the description of the figure. Does the only figure show an ignition coil for internal combustion engines in a perspective representation? partially dissected? and on an enlarged scale.

Descrizione dell'esempio di realizzazione Description of the example of realization

Una bobina di accensione per mortori endotermici possiede una custodia 10 a forma di manicotto, in lamiera di acciaio, con un ingrosjsamento inferiore e superiore 11 di sezione trasversale a forma di U. Una custodia 12 della membrana a forma di marmitta in lamiera di acciaio possiede un bordo esterno radiale 15 ed un fondo 13 con una rientranza centrale 14 ed una piastra centrale 60 presentante pi? fori 61 di compensazione della preiasione. Un elemento intermedio 16, pure fatto di lamiera di acciaio, possiede un piede 17, che appoggia sulla faccia interna del fondo 13, ed una piastra centrale 18, su una cui faccia si appoggia una membrana 19 e contro l'altra cui faccia esercita una pressione una molla di pressione elicoidale 20, che s^appoggia parimenti sulla faccia interna del fondo 13? Un anello 21 di materiale isolante possiede una fessura diagonale 23 ed un ingrossamento esterno 22 , che con il bordo esterno 15, costituente il punto di fissaggio per la membra na 19, ? ribordato a tenuta di pressione su un anello di tenuta 24 nell'ingrossamento 11. An ignition coil for endothermic mortars has a sleeve-shaped housing 10, made of sheet steel, with a U-shaped cross-sectional lower and upper gusset 11. A muffler-shaped diaphragm housing 12 made of sheet steel has a radial outer edge 15 and a bottom 13 with a central recess 14 and a central plate 60 having more? 61 pre-axis compensation holes. An intermediate element 16, also made of sheet steel, has a foot 17, which rests on the internal face of the bottom 13, and a central plate 18, on one face of which a membrane 19 rests and against the other whose face exerts a pressure a helical pressure spring 20, which also rests on the inner face of the bottom 13? A ring 21 of insulating material has a diagonal slot 23 and an external enlargement 22, which with the external edge 15, constituting the fixing point for the member 19,? pressure-tight remborded on a sealing ring 24 in the enlargement 11.

Il bordo esterno 62 della membrana 19 serve contemporaneamente al fissaggio della membrana nella custodia 10. La fessura diagonale 23 ed un'ala esterna 43 inserita in questa (che viene descritta ulteriormente nel seguito) con le loro pareti all'altezza dell'asse 51 della bobina costituscono due passaggi 63 per l'olio riempiente la bobina. Questo a temperature superiori alla temperatura ambiente, fra le pareti 64, 64' e le pareti 65, 65' si porta in direzione della membrana 19; in caso di temperature inferiori alla temperatura ambiente l'olio attraverso i passaggi 63 rifluisce nel vano dell'olio. The outer edge 62 of the membrane 19 simultaneously serves to fix the membrane in the housing 10. The diagonal slot 23 and an outer wing 43 inserted in this (which is described further below) with their walls at the height of the axis 51 of the spool comprise two passages 63 for the oil filling the spool. At temperatures higher than the ambient temperature, between the walls 64, 64 'and the walls 65, 65' it moves in the direction of the membrane 19; at temperatures below ambient temperature, the oil flows back into the oil compartment through the passages 63.

Un coperchio 25 fatto di materig. artificiale parimenti tramite un anello di tenuta 24 ? ribordato a tenuta di pressione nell'ingrassamento 11 e possiede due spinotti di connessione primari 26. Dal coperchio 25 verso l'esterno spor-^ gono un duomo 27, equipaggiato di una bo?cola di contatto 28, un bocchettone cieco 29 - che nel cascj di una cosiddetta bobina di accensione a due scintille ? realizzato come secondo duomo 29' - ed un boc-j elettone anulare 30 con un tappo 31 di scoppio. j Una piastra di sostegno 32 fatta di materiale isolante possiede tre <">bracci di cen- ^ traggio 33, i quali sono adattati in una rientranza del coperchio 25, ed un primo ed un secondo bocchettone tubolare 34-, sporgente nell'interno 35, con un manicotto di contatto 36; un ulteriore manicotto di contatto 36' presenta la porzione centrale della piastra di sostegno 32. A lid 25 made of materig. artificial likewise via a sealing ring 24? pressure-tight edged in the grease fitting 11 and has two primary connection pins 26. From the cover 25 outwards protrude a dome 27, equipped with a contact sleeve 28, a blind union 29 - which in the drop of a so-called two-spark ignition coil? made as a second dome 29 '- and an annular electron mouth 30 with a bursting plug 31. A support plate 32 made of insulating material has three centering arms 33, which are adapted in a recess of the lid 25, and a first and a second tubular union 34-, projecting into the interior 35 , with a contact sleeve 36; a further contact sleeve 36 'presents the central portion of the support plate 32.

Un nucleo di ferro lamellato 37, a forma di E, attorno alla propria ala centrale con disposizione concentrica possiede un corpo 40 di bobina con un avvolgimento primario 39 e su questo un corpo di bobina 42 con un avvolgimento secondario 41. Un'ala esterna 43 del nucleo di ferro 37 viene alloggiata dalla piastra di sostegno 32 tramrte sporgenze non disegnate, e la seconda ala esterna 43 si appoggia nella fessura 23 dell'anello 21. Un giogo 44 collegante le due ali esterne 43 ? disposto parallelamente alla^parete della custodia 10 e forma con l'ala centrale 38 un traferro non disegnato. _ An E-shaped laminated iron core 37, around its central wing with concentric arrangement, has a coil body 40 with a primary winding 39 and on this a coil body 42 with a secondary winding 41. An outer wing 43 of the iron core 37 is housed by the support plate 32 by means of non-drawn projections, and the second outer wing 43 rests in the slot 23 of the ring 21. A yoke 44 connecting the two outer wings 43? arranged parallel to the wall of the housing 10 and forms an undrawn air gap with the central wing 38. _

Una molla a lamina 45 a forma di U possiede due ali 46 (soltanto una di queste ? visibile) ed un traversino 47 che le collega ed ? inserito nella fessura 23 al disotto dell'ala est na 43. Le due ali elastiche 46 fissano il nucleo di ferro 37 all'interno della custodia 10 in dire zione radiale. Due molle a lamina 54? disposte in fessure 55 del corpo 40 della bobina fissano all'interno della custodia 10 in direzione radiale ed assiale. A U-shaped leaf spring 45 has two wings 46 (only one of these is visible) and a crosspiece 47 which connects them and? inserted in the slot 23 below the outer wing 43. The two elastic wings 46 fix the iron core 37 inside the housing 10 in a radial direction. Two leaf springs 54? arranged in slots 55 of the coil body 40 they fix inside the housing 10 in the radial and axial direction.

Un elemento terminale 48 di ? fissato sullo spinotto di connessione 26 ed in uguale maniera ? fissato il secondo elemento terminale di linea non visibile. L'elemento terminale di linea 49 dell'avvolgimento secondario 39 attraversa il bocchettone tubolare 34 ed e collegato elettricamente con la boccola di contatto 36? Su questa e sulla boccola di contatto 28 si appoggia una molla di pressione conica 50? ?d un'ulteriore molla di pressione conica 50' si appoggia sul?1,manicotto di contatto 36' e sulla faccia interna del coperchio 25- Una terza molla di pressio ne conica 50 si appoggia sul bocchettone cieco 29 e sulla piastra di sostegno 32. L? tre molle coniche 50, 50' provocano il fissaggio assiale del A terminal element 48 of? fixed on the connection pin 26 and in the same way? fixed the second non-visible line terminal element. The line terminal element 49 of the secondary winding 39 crosses the tubular union 34 and is electrically connected to the contact bushing 36? A conical pressure spring 50 rests on this and on the contact bushing 28? ? d a further conical pressure spring 50 'rests on? 1, contact sleeve 36' and on the inner face of the cover 25- A third conical pressure spring 50 rests on the blind union 29 and on the support plate 32 . L? three conical springs 50, 50 'cause the axial fixing of the

]Lucleo di ferro 37 in direzione dell'asse 51 della bobina di accensione. ] Lucleo iron 37 in the direction of axis 51 of the ignition coil.

A ridosso del lato frontale del corpo 42 della bobina sono sagomati un primo ed un secondo manicotto 53? che si fronteggiano diame tralmente , ed in ogni manicotto 53 ? inserita una molla di pressione elicoidale 52 che spinge controil giogo 44. In tal modo l'avvolgimento secondario 41 e, tramite questo, l'avvolgimento primario 39, trasversalmente all?asse 51 della bobina di accensione sono fissati sul nucleo di ferro 37? A first and a second sleeve 53 are shaped against the front side of the reel body 42? that face each other diametrically, and in each sleeve 53? inserted a helical pressure spring 52 which pushes against the yoke 44. In this way the secondary winding 41 and, through this, the primary winding 39, transversely to the axis 51 of the ignition coil are fixed on the iron core 37?

Un involucro 66 di carta isolant? ? fissato nel traferro 67 del nucleo di ferro 37, per effetto della pressione delle due molle elicoidali 52, sul loro lato interno e costituisce un isolamento attorno all'intero avvolgimento. L'involucro 66 si appoggia sulla parete interna della custodia 10 e viene delimitato dalle due ali esterne 43. A wrapper 66 of insulating paper? ? fixed in the air gap 67 of the iron core 37, by effect of the pressure of the two helical springs 52, on their inner side and constitutes an insulation around the entire winding. The casing 66 rests on the internal wall of the casing 10 and is delimited by the two external wings 43.

Claims

1.- Ignition coil for endothermic engines with? Infl case, which has an elastic bottom? enclosed by a lid, and with an iron core, having a primary winding and a secondary winding, and what? fixed in the case and surrounded by insulating liquid, characterized by the fact that the elastic bottom? formed by a membrane (19) fixed in the housing (10), as well as? by the fact that a pressure spring (20) rests on the bottom (13) and pushes against the membrane (19), and finally by the fact that the insulating element? a pressurized transformer oil filling the entire interior (35) of the ignition coil.

2.- Reel according to Claim 1, characterized by the fact that an intermediate element (16) has a foot (17), resting it on the internal side of the bottom (13), and a central plate (18), on one face of which it rests the membrane (19) while the pressure spring exerts a pressure against its other face, which? performed as a helical pressure spring (20) and rests on the internal face of the bottom (13).

3? - Coil according to Claim 1 or 2, characterized in that a muffler housing (12) of the membrane has the bottom (13) and a recess (14?), Centering the helical pressure spring (20), as well as? an outer edge (15> constituting the fixing point for the membrane (19)?

4. Coil according to one of the preceding claims, characterized in that a ring (21) of insulating material has a radially protruding external enlargement (22) and a diagonal slot (23), wherein the external enlargement (22) with the outer edge (15) of the housing (12) of the membrane and the membrane (19) on the housing (10) are edged and the slot (23) houses a wing (43) of the iron core (37) ? 5? - Coil according to 1? claim 4 with at least one contact socket in the cover for the high voltage connection, characterized in that a support plate (32) of insulating material? fixed in the cover (25) and houses the wing (43 of the iron core (37) facing the wing (43), as well as by the fact that especially three conical pressure springs (50, 50 ') rest on the plate support (37) and on the inner face of the cover (25), where one or two pressure springs (50 '? 50) establish the electrical connection between the secondary winding (41) and the contact bush (28).

6.- Coil according to Claim 5, characterized in that at least one tubular union (34-) protrudes from the support plate (32), in which? fixed a contact sleeve (36) cooperating with a spring

with the / pressure (50, 50 '), as well as? from the fact that the terminal portion of the secondary winding (41)? passed through the tubular element (34-) and d? electroconductively connected to the contact sleeve (36).

7? - Coil according to claim 5 or 6, the cover of which has an outlet, characterized in that the outlet? closed by a bursting plug (31) -8.- Coil according to one of the preceding claims with an E-shaped iron core, whose central wing houses the primary winding and the secondary winding, and whose two outer wings are connected by a yoke, which forms a gap? ro with the central wing, characterized by the fact that in the air gap (67)? arranged an insulating paper (66) which by means of two springs (52)? insured in this position, as well as? by the fact that the insulating paper embraces the iron core (37) and the two windings (39, 4-1) and forms an envelope (66).

9 - Coil according to Claim 8, the secondary winding of which bears a flange, characterized in that on the front side of the coil body (42) there are two pressure elements (152), which leaf diagonally and space the body ( 42) of the coil from the yoke (44) of the iron core (37)? _

10.- Coil according to claim 9, characterized in that each pressure element? a helical pressure spring (52) inserted in a sleeve (53) protruding from the body (42) of the coil

11.- Coil according to one of claims 8 to 10, characterized in that the radial fixing of the iron core (37) in the housing (10) takes place by means of a U-shaped leaf spring (45)

12.- Coil according to Claim 11, characterized in that? the leaf spring (45) has two wings (46) and a crosspiece (47) that connects them, as well as? by the fact that the cross member (47) inserted in the slot (23) of the ring (21) and houses an external wing (43) of the iron core (37), as well as? by the fact that the two elastic wings (46) rest on the inner face of the case (10).

13.- Coil according to claims 7 to 12, characterized in that the yoke (44) of the iron core (37)? arranged parallel to the axis (51) of the ignition coil. 14.- Coil according to one of claims 8 to 13? characterized by the fact that the body (40) of the coil? centered in radial and axial direction on the central wing (38) of the iron core (37) by means of two leaf springs (54?)?

15? - Coil according to claim 14, characterized in that the body of the coil rests on several? projections (56) of the body (40) of the] _ reel and this support? insured by pi? coil pressure springs (52).

16.- Coil according to one of claims 8 to 15? characterized by the fact that the involuer? (66) of insulating paper, fixed in the air gap (67)? isolja the entire winding in addition to the transformer oil.

17? - Coil according to one of claims 4 to 16, characterized in that the slot (23) and the outer wing (4-3) inserted in this hole with their walls two passages (63) for the oil for transformers.

State of the art

The invention starts from an ignition bottle for internal combustion engines of the type of the main claim. An ignition coil of this type is known, in which the bottom of the muffler-shaped housing compensates for the temperature-dependent volume variation of the insulating liquid. In order to achieve perfect compensation in particular, the shape of the bottom and the wall thickness of the steel used must be exactly matched to each other. In spite of the sufficient supply of this type of ignition coils, it is not satisfactory, especially in the case? of extreme operating conditions.

Advantages of the Invention

With the ignition coil, the indication is substantially solved the problem set forth with reference to the current state of the art and a sufficient operating temperature is obtained in a temperature range of approximately minus 30. up to pi? ^ 2? degrees Celsius. Also not? the mounting position of the ignition coil is limited, which constitutes a substantial advantage especially considering the restricted space conditions in the engine compartment.

Advantageous further developments of the invention are described in the subordinate claims. With the execution of the ignition coil according to claim 2 and furthermore according to claim 3, a membrane arrangement of simple manufacture is realized and d? sure effect. If the ignition coil is further developed with the features of claim 4, a suitable fixing of the membrane and the iron core in the case is thus obtained.

In order to fix in the axial direction the iron core, equipped with the two windings, and to implement the electrical contact area, a further development is proposed according to claim. rio is obtained with the features of claim 6?

. If connection domes are provided on the cover 3, to provide either only one or two high voltage connections, then not? Do you need any additional provisions for possible burst protection? A safety protection against bulk closure of the iron core is achieved when the coil is made according to claim 8 and further thereby. possible to reduce the noise? of the air gap. Secure fixing of the two coils on the iron core under all operating conditions is obtained with the characteristics of claim 91 With the further development of the coil according to claim 11 and furthermore with claim 12

the iron core? uniquely set in the

custody. The feature of the claim

13 in the case of an outbreak allows the perfect escape of the ?? transformer oil,

, With claim 14 comes

indicated as to be fixed simply 1 * awolgim? nt? primary on the ferr core? * Specifically

the two leaf molils are located in slots 55

of the cjrpo 40 of the coil and by effect of the pressure? ^ on the central one fix the body of the coil **

bina in axial and radial direction.

With the further development? according to

claim 13 it is possible to preassign the position of the secondary coil body,

for which ess? by helical pressure spring

is kept pressed on the inner surface

of the primary coil body and in particular

allows contact on the opposite side V.

Also do you get it? advantage has the diameter

of the flange of the primary coil and of the

c? rpo of the secondary coil are aligned.

Additional insulation of the entire winding? obtained with claim 16.

Claim 17 indicates a simple solution to allow continuously and surely the movement of the transformer oil depending on d? changes in temperature.

Drawing

? An example of embodiment of the invention? represented in the drawing and illustrated pi? ii? tagged in the description of the figure. The only figure shows an ignition coil for internal combustion engines in perspective representation, partially sectioned, and on an enlarged scale.

Description of the example of realization

An ignition coil for endothermic engines has a sleeve-shaped case 10, made of steel sheet, with an enlargement; lower and upper 11 of U-shaped cross section. A membrane housing 12

The muffler in sheet steel has a radial outer edge 15 and a bottom 13 with a central recess 14 and a central plate 60 having more pressure compensation holes gl. An intermediate member 16, also made of

sheet steel, possesses a foot 17, which displeases the interior of the bottom 13? and a central plate 18, on whose face rests a? limbs. n? to 19; and contr? or the other one to whom he exercises. a passion cites a helicoidal pressure spring and 20, which is likewise on the inside face of the bottom 13 * A ring 21 of insulating material has a diagonal slot 23 and an external enlargement 22 9 which with the external? 15 * constituting the fixing point for the member 19,? re-welded 4 with pressure seal on a sealing ring 24 npl the enlargement 11>

The outer edge 62 of the member 19 serves simultaneously to fix the membrane in the housing 10? The diagonal slot 23 and an external wing 43 inserted in it (which is described further below), with their walls at the height of the axis 51 of the reel, constitutes two passages 63 for the oil filling the reel. . This at temperatures higher than the ambient temperature, between the parts 64, 64 'and the walls 65, 651 moves in the direction of the membrane 19; in the case of temperatures below ambient temperature, does the oil flow back into the oil chamber through passages 63?

A lid 25 made of *? Ater <? > artificial likewise via a sealing ring 24? re-edged, pressure-tight in the inlet 11 and has two primary connection pins 26. From the cover 25 towards the outside protrude a dome 27? j? u ipaggiat o of a boQ> cc? ia of to 28, a blind union 29 - which in the ac of a so-called two-spark ignition coil? built as a second cathedral 29 '- and a bo. electron pant 30 with a burst cap 31.

A 32 fat support plate of insulating material possesses tr? centering arms 33? which are adapted in a recess of the cover 25 * and a first and a second tubular mouth $ 4, projecting in the interior 35 * with a contact sleeve 36; a further contact sleeve 36 'presents the central portion of the support plate 32.

An E-shaped laminated iron core 3, around its central wing and concentric arrangement, has a coil body 40 with a primary winding 39 and on this a coil body 42 with a secondary winding 41. An outer wing 43 of the iron core 37 is housed by the support plate 32 through non-drawn projections, and the second outer wing 43 rests in the slot 23 of the ring 21. A yoke 44 connecting the two outer wings 43? arranged parallel to the wall of the enclosure 10 and forms an undrawn air gap with the central flange 38.

A U-shaped leaf spring 45 has two wings 46 (only one of these is visible) and a crosspiece 47 which connects them and? inserted in the slot 23 below the outer wing 43. the two elastic wings 46 fix the iron core 37 inside the housing 10 in a radial direction. The leaf springs 54, arranged in slots 55 of the coil body 40 fix the latter inside the housing 10 in the radial and axial direction.

A 48 line terminal element? fixed on the connection pin 26 and in the same way? fixed the second non-visible line terminal element. The line terminal element 4?; 4 and the secondary winding 39 at-. crosses the tubular union 34 and? electrically connected to the contact socket 36.; A conical pressure spring 50 and a further conical pressure spring 50 rest on this and on the contact bushing 28? leans on. contact sleeve 36 'and on the inner face of the cover 25. A third conical pressure spring 50 rests on the blind union 29 and on the support plate 32. The three conical springs 50, 50' cause axial fixing of the iron core 37 in the direction of the axis 51 of the ignition coil.

A first? D and a second sleeve 53 are shaped against the front side of the body 42 of the reel, which face each other driving diameter,, and? in each sleeve? 3? inserted a helical pressure spring 52 which pushes against the yoke 44. in this way the secondary winding f41 and, by means of this, the primary winding 39 * transversely to the axis 51 of the ignition coil are fixed on the ignition core iron 37?

A wrapper 66 of insulating paper? fixed in the air gap 67 of the iron core 37 by the effect of the pressure of the two helical springs 52, on their internal hiatus; and constitutes an insulation around the entire winding. The casing 66 rests on the internal wall of the casing 10 and is delimited by the two external wings 43.

Claims

1.- Ignition coil for internal combustion engines with a case, which has an elastic bottom? enclosed by a cover, and with an iron core, having a primary winding and a secondary winding, and what? fixed in the case and surrounded by the insulating liquid, characterized by the fact that the elastic bottom? formed by a membrane (19) fixed / in the case (10), as well as? by the fact that the pressure spring (20) rests on the bottom (13) and paints against the membrane (19), and finally by the fact that the liquid? solant? uh pressurized ti * extractor oil filling the entire internal compartment (35) of the ignition coil?

2.- Coil according to Claim 1, characterized in that an intermediate element (16) has a foot (17)? rest them on the inner side of the bottom (13), and a central plate (18), on one face of which the membrane (19) rests while the pressure spring exerts a pressure against its other face, which? performed as a helical pressure spring (20) and rests on the internal face of the bottom (13).

3? - Coil according to Claim 1 or 2, characterized in that a muffler housing (12) of the membrane has the bottom (13) and a recess (14), centering the spring d? helical pressure (20), as well as? an outer edge (15) constituting the fixing point for the membrane (1.9)? "

4. - Coil according to one of the preceding claims, characterized in that a ring (21) made of a flowing material has an external enlargement (22) protruding radially and a diagonal slit (25), whereby the enlargement (22) with the outer edge (15) of the housing (12) of the membrane and the membrane (19) on the housing (10) are edged and the slot (25) houses a wing (45) of the iron core (57 )? 5> - Coil according to claim 4 with at least one contact bushing in the cover for the high voltage connection, characterized in that a plate d? support (52) of insulating material? fixed in the cover (25)? and houses the wing (45 of the iron core (57), facing the wing (45), as well as by the fact that especially three conical pressure springs (50, 50 *) are housed on the support plate (57) and on the internal face of the cover (25), where one or two pressure springs (50 ', 50) establish the electrical connection between the secondary winding (41) and the contact bush ( 28).

6? - Coil according to claim 5, characterized in that the plate d? support (32) protrudes at least one tubular union (3 *) * in which? fixed a contact sleeve (36) cooperating with a spring

with the / pressure (50? 50 ')? as well? from the fact that the terminal portion of the secondary winding (41)? made to pass through the tubular element (34) and? and ?? electroconductively connected to the contact sleeve (36)?

7 - Coil according to claim 5 or 6, the lids of which? presents an exit, characterizes? ta from the fact that the exit? closed by a burst cap (3l)?

8.- Coil according to one of the preceding claims with an E-shaped iron core, whose central wing houses the primary winding and the secondary winding, and whose two outer wings are connected by a yoke, which forms an air gap with the central wing, characterized by the fact that in the air gap (6?)? arranged an insulating paper (66) which by means of two springs (52)? insured in this position, as well as? by the fact that the insulating paper embraces the iron core (37) and? two windings (39, 41) and forms a shell (66).

9. A bobbin according to claim 8, the secondary winding of which bears a flange, characters? due to the fact that on the front side of the coil body (42) there are two pressure elements {? , which face each other diagonally and distance the body (42) of the coil from the yoke (44) of the m? ci? o, of iron (37)?

10.- Coil according to Claim 9, characterized by fact? that every element of ssione? a helical pressure spring (52) inserted in a sleeve (55) protruding from the body (42) of the coil.

11.- Bohina?;? According to one of claims 8 to 10, characterized in that the radial fastening of the iron core (57) in the housing (10) takes place by means of a leaf spring (45) in the form of, U.

12 .-. A system according to claim 11, characterized in that the spring (45) has two wings (46.) and a cross member (47) which connects them as well as a cross member (47). by the fact that the cross member (47) inserted in the slot (23) of the ring (21) and houses a

the fact that the two elastic wings (46) rest on the inner face of the case (10).

13 - Coil according to one of claims 7 to 12, characterized in that the yoke; (44) of the iron core (57)? arranged parallel to the axis (51) of the ignition coil 14. - Coil according to one of claims 8 to 15; characterized in that the core (40) of the coil? centered in the radial direction and d? axial s * 'dl3fi.i? wing centr.al, e (38) of the nucleus of ro (37) by means of two leaf springs (54). ? 15 - Coil according to claim 14, characterized in that the body of the coil rests on several projections (56) of the body (40) of the coil and this support? insured by pi? helical pressure springs (52). THE

16.- Coil According to one of the claims up to 15? characterized by the fact that the envelope (66) of insulating paper, fixed in the air gap (67), insulates the entire winding additionally to the oil pe?

17? - Coil, according to one of claims 4 to 16, characterized by the fact that the slot (23) and the external wing (43) inserted in this phonemate with their walls two passages (63) for the oil for transformers. ?