US3191133A - Interference suppressor for internal combustion engines - Google Patents

Interference suppressor for internal combustion engines Download PDF

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Publication number
US3191133A
US3191133A US135973A US13597361A US3191133A US 3191133 A US3191133 A US 3191133A US 135973 A US135973 A US 135973A US 13597361 A US13597361 A US 13597361A US 3191133 A US3191133 A US 3191133A
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United States
Prior art keywords
plug
capacity
inductance
internal combustion
values
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Expired - Lifetime
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US135973A
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English (en)
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Texsier Leon
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Individual
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Individual
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    • 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
    • H01T13/04—Means providing electrical connection to sparking plugs
    • H01T13/05—Means providing electrical connection to sparking plugs combined with interference suppressing or shielding means
    • 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
    • H01T13/40—Sparking plugs structurally combined with other devices
    • H01T13/41—Sparking plugs structurally combined with other devices with interference suppressing or shielding means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
    • H04B15/025—Reducing interference from ignition apparatus of fuel engines

Definitions

  • An ignition system for an internal combustion engine constituted by a contact breaker, a coil, a distributor and a sparking plug may be considered as a generator of damped electrical oscillations, the frequencies of which extend over a range of values which is ill-defined by reason of the complexity of the different parameters involved.
  • the frequency band of the oscillations produced when the spark jumps across the electrodes of the plug may extend to several megacycles according to the values of the distributed capacities and the inductance value of each constituent member of the ignition system and the assembly thereof.
  • connections near the ignition system such as those connecting the battery and the headlamps in an -automobile vehicle, for example, are in their turn excited in the same way and produce parasitic oscillations.
  • the present invention has for an object to make a suppressor device of the second category mentioned above, designed so as simultaneously to obtain an efficient suppression for a very large range of frequencies and conditions favorable to ignition while retaining a retail price allowing yit to be extensively applied to all types of vehicles.
  • the invention is based on the fact that the residual United States Patent O 3,l9l,i33 Patented June 22, 1965 capacity of many types of plugs in current use is of a very substantially constant value of the average order of l5 ,ufarad.
  • the principle from which the invention comes consists in using this residual capacity as an active member of the suppressor device instead of considering it as an inevitable parasitic part.
  • a suppressor device intended to be directly inserted between the plug, having a determined residual capacity Cbg, and the plug lead, also by construction having a determined capacity C4, is characterized in that it is constituted by a low pass T-tilter network, this network on the one hand comprising, in series, two assemblies resistor R1 and inductance 'and resistor R2 and inductance L2 respectively formed by a resistance R1 or R2 in series with an inductance L1 or L2 and on the other hand, in shunt, a capacity of value C3 which is in the neighborhood of the value of the residual capacity Chg of the plug, these values of the different aforementioned parameters being interconnected by the following relationships:
  • the low pass T-lter network in fact, by reason of its direct insertion between the plug with the residual capacity Chg, and the plug lead with a capacity C4, forms an assembly which from the point of View of electrical operation is equivalent to the connection in series of two low pass 1r-ltens.
  • the first of these networks is constituted by the series arrangement R1, L1 and the shunt arrangement of the capacitative members Chg and C2.
  • the second of these net-works is constituted of the tseries assembly R2L2 and of the capacitative members C3 and C4 in shunt, the capacity C3 thus being common to tlhe two networks.
  • FIGURE l shows anj electrical circuit diagram of a suppressor device according to the present invention, and' FIGURES 2 to 4, by way of example, show different ,embodiments of tihe actual device.
  • FIGURE 1 in this drawing have been diagrammatioally shown the electrodes Bg of the plug, the residual capacity of the latter being denoted Yby Chg.
  • the plug leadr is represented by its equivalent 'circuit comprising the capacity C4 and the resistancefR4.
  • the capacity C4 is that ⁇ of this conductor ⁇ in relation to earth and the resistance Rgis the 'equivalent resistance of the j leakages by radiation and ohmic resistance.
  • the method of operation of the ⁇ device is as follows:
  • the ⁇ pules wave which is produced on these electrodes first of allpasses through theassembly of the members R1, L1 and C3 and then reaches the input of thel tirst passage through the members R1, L1 and 'C3'under-- goes considerable weakening of its high frequency components in such a way that, for the components of the low frequencies,A the plug lead at its i-nputconsti'tutes a capaci-Y tative member.
  • themernbers ycomprising resistor R1 and inductance L1and resistor R2 and inductance L2 are lformed by windn'g'a resistant wire lon to a core ⁇ 1 of suitable insulating material which simultaneous-ly allows the intended'values ⁇ for R and L of each of the networks of the filter to be obtained, that is tosayy an inductance and a resistance formed .according tothe above relationships.
  • Inrthe niiddle of theY core is ar flange 2 on whichy is mounted ametal ring 3 (or alternativelyl the Harige .2 may be metallized), and would thus 'constitute oneof Ethe ele-ctrodes'of thecapacity C3..
  • the ring 3 4tllls the role of a lossless screen between two coils which :are thus not coupled.
  • Y l i These coils are mounted in the body of a connector 4 of plas-tic material which is suitable by reason of its dielectric qualities (rigidity :and permanence), the outside 6 of ⁇ *which* is either metallized by a' knownmethod or insertedin a metal envelope and this forms the second electrode Aofthe'capacity C3.
  • the assembly of the suppressor device is mounted directly in the body of a plu-g, as shown in EIGURE 4.
  • EIGURE 4 the same reference numerals indicate the same members as in FIGURES 2 and 3.
  • An interference suppressor device for internal combustion engines for direct insertion between the sparkplug, which has a determined residual capacity Cbg, and the plug lead, which has a determined capacity C4, said suppressor device being constituted by a low pass T-lter network, said network on the one hand comprising, in series, two assemblies resistor R1 and inductance L1 and resistor R2 and inductance L2 respectively formed by a resistance R1 or R2 in series with an inductance L1 or L2 and on the other hand, in shunt, a capacity of value C3 near to the value of the residual capacity of the plug Chg, the Values of the different aforementioned parameters being interconnected by the following relationships:
  • resistor R1 and inductance L1 and resistor R2 and inductance L2 are made in the form of two coils on a core of insulating material, having a support between the coils for a metal ring or a metallized layer constituting one of the electrodes of the capacity C3, the other terminal of this capacity :being made in the form of the outer metallisation of a connector of insulating material inside which is located the aforementioned core.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US135973A 1961-04-25 1961-09-05 Interference suppressor for internal combustion engines Expired - Lifetime US3191133A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR859839A FR1295473A (fr) 1961-04-25 1961-04-25 Dispositif d'antiparasitage pour moteurs à explosions

Publications (1)

Publication Number Publication Date
US3191133A true US3191133A (en) 1965-06-22

Family

ID=8753834

Family Applications (1)

Application Number Title Priority Date Filing Date
US135973A Expired - Lifetime US3191133A (en) 1961-04-25 1961-09-05 Interference suppressor for internal combustion engines

Country Status (5)

Country Link
US (1) US3191133A (fr)
BE (1) BE604602A (fr)
CH (1) CH377416A (fr)
FR (1) FR1295473A (fr)
GB (1) GB991938A (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384061A (en) * 1966-03-28 1968-05-21 Gen Motors Corp Means for suppressing ignition interference
US3441797A (en) * 1967-02-09 1969-04-29 Ralph R Lewis Spark intensifier gap with a transformer coil around the cable
US3683232A (en) * 1970-02-03 1972-08-08 Baur Elektronik Gmbh Fa Sparkplug cap
US3771006A (en) * 1972-02-14 1973-11-06 N Berry Ignition circuit radiation suppression structure
US3778752A (en) * 1971-11-26 1973-12-11 Gen Motors Corp Connector contact including an isolation resistor
US3882341A (en) * 1974-01-24 1975-05-06 Champion Spark Plug Co Spark plug with inductive suppressor
US4078534A (en) * 1975-05-21 1978-03-14 Mayer Ferdy P Anti-interference device for internal combustion engines
US4186712A (en) * 1974-10-22 1980-02-05 Brunswick Corporation RFI-suppressing ignition system for an internal combustion engine
US4636690A (en) * 1983-09-20 1987-01-13 Robert Bosch Gmbh Spark plug for an internal combustion engine, having a pilot breakdown gap
US4723115A (en) * 1985-10-11 1988-02-02 Robert Apter Power line cord filtering assembly
US4871883A (en) * 1986-07-29 1989-10-03 W. L. Gore & Associates, Inc. Electro-magnetic shielding
US5603306A (en) * 1995-02-03 1997-02-18 Tai; Tsai-Ting Ignition cable means for eliminating inerference
US5785035A (en) * 1993-11-30 1998-07-28 Yazaki Corporation Ignition device with series gap having shielding case
US6427673B2 (en) 2000-02-04 2002-08-06 Visteon Global Technologies, Inc. Ignition coil assembly
US20070293064A1 (en) * 2006-06-16 2007-12-20 Dennis Steinhardt Spark plug boot
DE102006038216A1 (de) * 2006-08-16 2008-02-21 Hella Kgaa Hueck & Co. Beleuchtungseinrichtung für Kraftfahrzeuge mit mindestens einer Glühlampe

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2267125A (en) * 1992-05-13 1993-11-24 Dawson Royalties Ltd I.c.engine spark ignition circuit.
RU2295185C1 (ru) * 2005-08-12 2007-03-10 Открытое акционерное общество "АВТОВАЗ" Устройство подавления радиопомех

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1723908A (en) * 1926-06-14 1929-08-06 Gen Electric Ignition system
US1946680A (en) * 1927-04-06 1934-02-13 Rca Corp Means for preventing interference
US1984526A (en) * 1928-07-18 1934-12-18 Bell Telephone Labor Inc Filter for suppression of high frequency current
US2238915A (en) * 1937-10-13 1941-04-22 Titeflex Metal Hose Co Electric filter
US2322773A (en) * 1941-07-28 1943-06-29 Melville F Peters Electrical conductor
US2894221A (en) * 1955-10-11 1959-07-07 Carl E Coy Artificial transmission lines
US3002126A (en) * 1957-06-20 1961-09-26 Indufi S A De Participations Mechanical members connected to form an electrical circuit

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1723908A (en) * 1926-06-14 1929-08-06 Gen Electric Ignition system
US1946680A (en) * 1927-04-06 1934-02-13 Rca Corp Means for preventing interference
US1984526A (en) * 1928-07-18 1934-12-18 Bell Telephone Labor Inc Filter for suppression of high frequency current
US2238915A (en) * 1937-10-13 1941-04-22 Titeflex Metal Hose Co Electric filter
US2322773A (en) * 1941-07-28 1943-06-29 Melville F Peters Electrical conductor
US2894221A (en) * 1955-10-11 1959-07-07 Carl E Coy Artificial transmission lines
US3002126A (en) * 1957-06-20 1961-09-26 Indufi S A De Participations Mechanical members connected to form an electrical circuit

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3384061A (en) * 1966-03-28 1968-05-21 Gen Motors Corp Means for suppressing ignition interference
US3441797A (en) * 1967-02-09 1969-04-29 Ralph R Lewis Spark intensifier gap with a transformer coil around the cable
US3683232A (en) * 1970-02-03 1972-08-08 Baur Elektronik Gmbh Fa Sparkplug cap
US3778752A (en) * 1971-11-26 1973-12-11 Gen Motors Corp Connector contact including an isolation resistor
US3771006A (en) * 1972-02-14 1973-11-06 N Berry Ignition circuit radiation suppression structure
US3883776A (en) * 1972-02-14 1975-05-13 Norman H Berry Ignition circuit radiation suppression structure
US3882341A (en) * 1974-01-24 1975-05-06 Champion Spark Plug Co Spark plug with inductive suppressor
US4186712A (en) * 1974-10-22 1980-02-05 Brunswick Corporation RFI-suppressing ignition system for an internal combustion engine
US4078534A (en) * 1975-05-21 1978-03-14 Mayer Ferdy P Anti-interference device for internal combustion engines
US4636690A (en) * 1983-09-20 1987-01-13 Robert Bosch Gmbh Spark plug for an internal combustion engine, having a pilot breakdown gap
US4723115A (en) * 1985-10-11 1988-02-02 Robert Apter Power line cord filtering assembly
US4871883A (en) * 1986-07-29 1989-10-03 W. L. Gore & Associates, Inc. Electro-magnetic shielding
US5785035A (en) * 1993-11-30 1998-07-28 Yazaki Corporation Ignition device with series gap having shielding case
US5603306A (en) * 1995-02-03 1997-02-18 Tai; Tsai-Ting Ignition cable means for eliminating inerference
US6427673B2 (en) 2000-02-04 2002-08-06 Visteon Global Technologies, Inc. Ignition coil assembly
US20070293064A1 (en) * 2006-06-16 2007-12-20 Dennis Steinhardt Spark plug boot
US7455537B2 (en) 2006-06-16 2008-11-25 Briggs & Stratton Corporation Spark plug boot
DE102006038216A1 (de) * 2006-08-16 2008-02-21 Hella Kgaa Hueck & Co. Beleuchtungseinrichtung für Kraftfahrzeuge mit mindestens einer Glühlampe

Also Published As

Publication number Publication date
FR1295473A (fr) 1962-06-08
BE604602A (fr) 1961-10-02
CH377416A (fr) 1964-05-15
GB991938A (en) 1965-05-12

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