DE2244597C3 - Electrical insulating body for ignition systems of internal combustion engines - Google Patents

Electrical insulating body for ignition systems of internal combustion engines

Info

Publication number
DE2244597C3
DE2244597C3 DE2244597A DE2244597A DE2244597C3 DE 2244597 C3 DE2244597 C3 DE 2244597C3 DE 2244597 A DE2244597 A DE 2244597A DE 2244597 A DE2244597 A DE 2244597A DE 2244597 C3 DE2244597 C3 DE 2244597C3
Authority
DE
Germany
Prior art keywords
insulating body
body according
internal combustion
foam
rigid foam
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.)
Expired
Application number
DE2244597A
Other languages
German (de)
Other versions
DE2244597A1 (en
DE2244597B2 (en
Inventor
Dietmar 7300 Esslingen Elwert
Goetz 7051 Neustadt Gaege
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to DE2244597A priority Critical patent/DE2244597C3/en
Priority to BR6982/73A priority patent/BR7306982D0/en
Priority to ES418672A priority patent/ES418672A1/en
Priority to IT28793/73A priority patent/IT1001540B/en
Priority to SE7312370-5A priority patent/SE393663B/en
Priority to GB4260973A priority patent/GB1439700A/en
Priority to JP48102991A priority patent/JPS5047041A/ja
Priority to US00396516A priority patent/US3829635A/en
Priority to FR7332841A priority patent/FR2199169B1/fr
Publication of DE2244597A1 publication Critical patent/DE2244597A1/en
Publication of DE2244597B2 publication Critical patent/DE2244597B2/en
Application granted granted Critical
Publication of DE2244597C3 publication Critical patent/DE2244597C3/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors

Description

Die Erfindung bezieht sich auf einen elektrischen Isolierkörper aus geschlossenzelligem Kunststoff-Hartschaum, in dem wenigstens ein hochspannungsführendes Anschluß- bzw. Schalterteil der Zündanlage einer Brennkraftmaschine eingebettet istThe invention relates to an electrical insulating body made of closed-cell rigid plastic foam, in which at least one high-voltage connection or switch part of the ignition system Internal combustion engine is embedded

Es *t (nach der DE-AS 1194 136, der DE-AS 15 808 und der DE-OS 16 65 023) schon bekannt, Hartschaum zur elektrischen Isolierung zu verwenden, wobei außen eine besondere Schicht aus dem gleichen bzw. einem anderen Material aufgebracht wird, um eine glatte Außenfläche zu erhalten. Das Aufbringen dieser besonderen Schicht erfordert jedoch in fertigungstechnischer Hinsicht erheblichen Aufwand.Es * t (according to DE-AS 1194 136, DE-AS 15 808 and DE-OS 16 65 023) already known to use rigid foam for electrical insulation, a special layer of the same or a different material is applied on the outside to create a to obtain a smooth outer surface. The application of this special layer, however, requires manufacturing technology Considerable effort.

Der Erfindung liegt die Aufgabe zugrunde, einen Isolierkörper der eingangs erwähnten Art zu schaffen, der beim Umschließen des Anschluß- bzw, Schalterteiles gleichzeitig wärmeisolierend wirkt und somit bei Abkühlung eine Kondenswasserbildung an seiner Innenwand vermeidet und der außerdem — im Vergleich zum vorerwähnten Stand der Technik — bei seiner Herstellung weniger Aufwand erfordertThe invention is based on the object of creating an insulating body of the type mentioned at the outset, which at the same time has a heat-insulating effect when enclosing the connection or switch part and thus at Cooling avoids the formation of condensation on its inner wall and also - im Compared to the aforementioned prior art - less effort is required to manufacture it

Diese Aufgabe ist erfindungsgemäß dadurch gelöst, daß in dem Kunststoff-Hartschaum die Poren in ihrer Größe nach der Wandfläche hin abnehmen und schließlich in eine dichte Außenhaut übergehen.This object is achieved according to the invention in that the pores in the rigid plastic foam in their Reduce size towards the wall surface and finally merge into a dense outer skin.

Durch Anwendung der soeben genannten Maßnahme, das heißt also, durch Anwendung eines sogenannten Integral-Hartschaumes, erhält man auch bei relativ kleinen Abmessungen des Isolierkörpers eine zufriedenstellende mechanische FestigkeitBy applying the measure just mentioned, that is to say by applying a so-called Integral rigid foam is also obtained with relative small dimensions of the insulating body have a satisfactory mechanical strength

Damit der Isolierkörper eine für alle praktisch vorkommenden Fälle ausreichende elektrische Festigkeit und darüber hinaus auch eine ausreichende Beständigkeit gegen Säure aufweist empfiehlt es sich, einen Polyurethan-Integral-Hartschaum zu wählen. Gute Ergebnisse wurden auch mit einem Polyisocyanurat-Integral-Haitschaum erzieltSo that the insulating body has sufficient electrical strength for all practical cases and also has sufficient resistance to acids, it is advisable to to choose a polyurethane integral rigid foam. Good results have also been achieved with a polyisocyanurate integral skin foam achieved

Um eine Brandgefahr bei dem Isolierkörper auszuschließen, empfiehlt es sich, einen eine Entflammung unterdrückenden Zusatz beizufügen, wofür vorzugsweise Aluminiumoxydhydrat (Al2O3 · 30 -351W)H2O) geeignet ist Der Anteil sollte 10 bis 50, vorzugsweise 35, Gewichtsprozent betragen.In order to exclude the risk of fire in the insulating body, it is advisable to add an additive to suppress inflammation, for which aluminum oxide hydrate (Al 2 O 3 · 30 -35 1 W) H 2 O) is suitable. The proportion should be 10 to 50, preferably 35, Be percent by weight.

Die Steifigkeit des Isolierkörpers kann im Bedarfsfall durch einen Zusatz an Füllstoff erhöht werden; wofür im bevorzugten Fall Kaolin, beispielsweise aber auch Talkum oder Glimmer, geeignet ist Dieser Anteil sollte ebenfalls 10 bis 50, vorzugsweise 35, Gewichtsprozent betragen.If necessary, the rigidity of the insulating body can be increased by adding filler material; what im In the preferred case kaolin, but also talc or mica, for example, is suitable. This proportion should likewise 10 to 50, preferably 35, percent by weight be.

Der Isolierkörper soll in der Zündanlage einer Brennkraftmaschine Verwendung finden und zur Einbettung wenigstens eines die Zündspannung führenden Anschluß- bzw. Schalterteils dienen. Im bevorzugten Fall soll der Isolierkörper als Kappe des Zündverteilers ausgebildet sein. Darüber hinaus kann aber der Isolierkörper beispielsweise auch den den Verteilerfinger aufnehmenden Verteilerläufer oder die Abschlußkappe des Zündspulengehäuses bilden.The insulating body should be used in the ignition system of an internal combustion engine and for Embed at least one connection or switch part carrying the ignition voltage is used. In the preferred In this case, the insulating body should be designed as a cap of the ignition distributor. In addition, can but the insulating body, for example, also the distributor rotor receiving the distributor finger or the Form the end cap of the ignition coil housing.

Claims (5)

Patentansprüche;Claims; 1. Elektrischer Isolierkörper aus gesehlossenzelligem Kunststoff-Hartschaum, in dem wenigstens ein hochspannungsführendes Anschluß- bzw, Schalterteil der Zündanlage einer Brennkraftmaschine eingebettet ist, dadurch gekennzeichnet, daß in dem Kunststoff-Hartschaum die Poren in ihrer Größe nach der Wandfläche hin abnehmen und ι ο schließlich in eine dichte Außenhaut übergehen.1. Electric insulator made of closed-cell Hard plastic foam in which at least one high-voltage connection or switch part the ignition system of an internal combustion engine is embedded, characterized in that that in the rigid plastic foam the pores decrease in size towards the wall surface and ι ο finally merge into a dense outer skin. 2. Isolierkörper nach Anspruch I, dadurch gekennzeichnet, daß der Hartschaum ein Polyurethan-Integral-Hartschaum ist.2. Insulating body according to claim I, characterized in that the rigid foam is a polyurethane integral rigid foam is. 3. Isolierkörper nach Anspruch 1, dadurch gekennzeichnet, daß der Hartschaum ein Polyisocyanurat-Integral-Hartschaum ist.3. Insulating body according to claim 1, characterized in that the rigid foam is a polyisocyanurate integral rigid foam is. 4. Isolierkörper nach einem der Ansprüche 1 bis 3, gekennzeichnet durch einen eine Entflammung unterdrückenden Zusatz, vorzugsweise Aluminiumoxydhydrat 4. Insulating body according to one of claims 1 to 3, characterized by an inflammation suppressive additive, preferably alumina hydrate 5. Isolierkörper nach einem der Ansprüche 1 bis 3, gekennzeichnet durch einen eine Versteifung bewirkenden Zusatz an Füllstoff, vorzugsweise Kaolin.5. Insulating body according to one of claims 1 to 3, characterized by a stiffening effect Addition of filler, preferably kaolin.
DE2244597A 1972-09-12 1972-09-12 Electrical insulating body for ignition systems of internal combustion engines Expired DE2244597C3 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DE2244597A DE2244597C3 (en) 1972-09-12 1972-09-12 Electrical insulating body for ignition systems of internal combustion engines
BR6982/73A BR7306982D0 (en) 1972-09-12 1973-09-10 INSULATION BODY IN PARTICULAR COVERAGE OF AN IGNITION DISTRIBUTOR
IT28793/73A IT1001540B (en) 1972-09-12 1973-09-11 INSULATING BODY IN PARTICULAR COVER OF AN IGNITION DISTRIBUTOR FOR MOTOR VEHICLES
SE7312370-5A SE393663B (en) 1972-09-12 1973-09-11 INSULATION BODY, ESPECIALLY A TEETH BENEFIT LOCK
ES418672A ES418672A1 (en) 1972-09-12 1973-09-11 Electrical insulating element such as a distributor cap
GB4260973A GB1439700A (en) 1972-09-12 1973-09-11 Insulating element
JP48102991A JPS5047041A (en) 1972-09-12 1973-09-12
US00396516A US3829635A (en) 1972-09-12 1973-09-12 Electrical insulating element such as a distributor cap
FR7332841A FR2199169B1 (en) 1972-09-12 1973-09-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2244597A DE2244597C3 (en) 1972-09-12 1972-09-12 Electrical insulating body for ignition systems of internal combustion engines

Publications (3)

Publication Number Publication Date
DE2244597A1 DE2244597A1 (en) 1974-04-25
DE2244597B2 DE2244597B2 (en) 1979-04-12
DE2244597C3 true DE2244597C3 (en) 1979-11-29

Family

ID=5856045

Family Applications (1)

Application Number Title Priority Date Filing Date
DE2244597A Expired DE2244597C3 (en) 1972-09-12 1972-09-12 Electrical insulating body for ignition systems of internal combustion engines

Country Status (9)

Country Link
US (1) US3829635A (en)
JP (1) JPS5047041A (en)
BR (1) BR7306982D0 (en)
DE (1) DE2244597C3 (en)
ES (1) ES418672A1 (en)
FR (1) FR2199169B1 (en)
GB (1) GB1439700A (en)
IT (1) IT1001540B (en)
SE (1) SE393663B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4177365A (en) * 1976-12-28 1979-12-04 Blackman Stanley J Moisture reducer for use in heated and vented container including electrical contacts
DE3329647C2 (en) * 1983-08-17 1993-10-28 Bosch Gmbh Robert Insulating cap to cover an ignition distributor
DE3619464A1 (en) * 1986-06-10 1987-12-23 Bosch Gmbh Robert IGNITION COIL FOR IGNITION SYSTEMS FOR INTERNAL COMBUSTION ENGINES
GB2472863B (en) * 2009-08-21 2013-10-23 Lamina Dielectrics Ltd Electrical insulating cap formation
GB2472864B (en) * 2009-08-21 2013-05-15 Lamina Dielectrics Ltd Electrical insulating cap formation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3277666A (en) * 1965-01-14 1966-10-11 Marsden H Simmons Ice storage system
DE1694560A1 (en) * 1967-01-24 1971-08-12 Licentia Gmbh Process for the production of flame-retardant, in particular non-flammable polyurethane foams
US3640920A (en) * 1969-05-21 1972-02-08 Atlas Chem Ind Rigid low-density filled cellular polyurethanes

Also Published As

Publication number Publication date
US3829635A (en) 1974-08-13
JPS5047041A (en) 1975-04-26
GB1439700A (en) 1976-06-16
ES418672A1 (en) 1976-02-16
DE2244597A1 (en) 1974-04-25
FR2199169B1 (en) 1977-05-20
SE393663B (en) 1977-05-16
IT1001540B (en) 1976-04-30
FR2199169A1 (en) 1974-04-05
BR7306982D0 (en) 1974-07-11
DE2244597B2 (en) 1979-04-12

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Legal Events

Date Code Title Description
EF Willingness to grant licences
C3 Grant after two publication steps (3rd publication)
8339 Ceased/non-payment of the annual fee