WO2010043546A1 - High frequency ignition system - Google Patents

High frequency ignition system Download PDF

Info

Publication number
WO2010043546A1
WO2010043546A1 PCT/EP2009/063121 EP2009063121W WO2010043546A1 WO 2010043546 A1 WO2010043546 A1 WO 2010043546A1 EP 2009063121 W EP2009063121 W EP 2009063121W WO 2010043546 A1 WO2010043546 A1 WO 2010043546A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal
coil
terminal cap
salient
ferrule
Prior art date
Application number
PCT/EP2009/063121
Other languages
French (fr)
Inventor
Dean Russel Hudson
Original Assignee
Delphi Technologies, Inc.
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 Delphi Technologies, Inc. filed Critical Delphi Technologies, Inc.
Publication of WO2010043546A1 publication Critical patent/WO2010043546A1/en

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
    • F02P23/00—Other ignition
    • F02P23/04—Other physical ignition means, e.g. using laser rays
    • 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
    • F02P3/00—Other installations
    • F02P3/01—Electric spark ignition installations without subsequent energy storage, i.e. energy supplied by an electrical oscillator
    • 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
    • F02P9/00—Electric spark ignition control, not otherwise provided for
    • F02P9/002—Control of spark intensity, intensifying, lengthening, suppression
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/06—Variable transformers or inductances not covered by group H01F21/00 with current collector gliding or rolling on or along winding
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines

Definitions

  • the present invention relates generally to an ignition system for direct injection combustion engine.
  • the traditional ignition system consists of a sparkplug acting as an electrical feed into a combustion chamber of a gasoline engine, providing concentrated thermal energy release, in the form of a spark, to initiate the combustion.
  • a conventional transformer is used, incorporating electronics to condition and to feed energy from the electrical network in vehicles (Battery, Generator).
  • a resonance based ignition system comprises of a resonator 10, a generator 10 and a heat release interface 14.
  • the resonance structure is operated beneficially under ISM (Industrial Scientific and Medical) radio bands, which were originally reserved internationally for the use of RF electromagnetic fields for industrial, scientific and medical purposes other than communications.
  • ISM frequencies 13,56MHz, 27,12MHz, 40,68MHz.
  • the operating frequency in such a structure is defined by the inductance and capacitance of the structure. Equation 1 : the resonance frequency is: J f / r L till_
  • the inductance can be described by a helical form, single layer wound, high frequency coil. This structure represents technically a typical capacitive loaded quarter-wave transmission line.
  • the ISM frequency bands suitable for these techniques are very narrow, less than 1% of the resonance frequency. This implies the mechanical elements representing the Coil and capacitor according to equation 1 have to be built to suit the target ISM frequency. At or close to the resonance frequency such ignition system will provide sufficient voltage to break the dielectric environment inside the combustion chamber, which is needed to release the heat to ignite the gasoline mixtures.
  • the present invention provide a tuning feature at the High Frequency (HF) coil termination which is an integral part of a resonance based ignition system in the low to mid RF range.
  • HF High Frequency
  • the tuning feature is provided at the lowest voltage side of the resonance structure which is the feeding connection between the HF generator and the HF Resonator. At the low voltage side of the helical coil, voltages inferior to 2.000 Volt (peak) can be expected, which allows the operation of such tuning interfaces with conventional means, even using air as dielectric insulation.
  • the tuning element varies the inductance to the desired Frequency. Variable capacitance adjustment could be achieved from another tuning device to give additional adjustment if required.
  • the invention provides a high frequency resonance based ignition system comprising a generator, a resonance structure, and a heat release interface, the resonance structure having a high frequency coil with terminations and a terminal ferrule connecting the low voltage input of the generator to a first coil termination, characterized in that it further comprises a tuning element provided for adjusting the inductance to the desired resonance frequency during the manufacturing of the resonance structure, said tuning element comprising : - a formed terminal cap connected to a coil termination in order to form the last turn of the coil, and
  • the invention allows overcoming tiny manufacturing tolerance in the manufacturing of the resonance structure.
  • the terminal cap has a brake around its circumference to emulate the last turn of the coil
  • the bottom part of the ferrule is provided with a coaxial cup member designed to be received in the tubular end of the core member of the resonance structure, and the salient finger extends radially from a peripheral edge of the cup member;
  • each coil termination is provided with a similar terminal cap for allowing inductance adjustment from each end of the resonance structure;
  • the present invention also proposes a method of manufacturing said high frequency resonance based ignition system as further explained in the following description.
  • FIG. 1 is a bloc-diagram showing a resonance based ignition system
  • FIG. 2 is a schematic perspective view showing partially the resonance structure according to the invention.
  • figure 3 is a similar view to the view of figure 2 showing more particularly the terminal cap of the resonance structure without the terminal part of the structure;
  • figure 4 is a similar view to the view of figure 2 showing more particularly the terminal part of the resonance structure comprising a terminal ferrule and a salient finger;
  • FIG. 5 is a cross section view showing an alternative embodiment of the terminal cap, salient finger and ferrule of figure 4.
  • a resonance structure 12 having a variable last turn HF coil termination, anchored on the low voltage end of the resonator, comprising of a formed terminal cap 16 of sufficient conductive material permanently connected to the HF inductor coil 18 by means of weld or solder.
  • the terminal cap 16 has a brake around its circumference to emulate the last turn of the coil 18.
  • the form of the contact surface of the terminal cap 16 can have ripples divided into equal parts of constant degrees for enhancing the mating terminal location, or of a smooth surface as shown in figure 3.
  • a terminal ferrule 20 connects the low voltage input to the resonator 12 via the terminal cap 16.
  • This terminal ferrule 20 has the addition of a formed shape 22 that is used to position and secure the part into the core 24 of the resonator 12. It is also isolated from the terminal cap 16.
  • the terminal ferrule 20 has a salient finger 26 used to contact with the terminal cap 16, as shown in figure 4.
  • the resonance structure 12 has to withstand high voltages for its ignition function, and due to the nature of a quarter- wave transmission line, the high voltage will be built up along the helical coil 18.
  • the terminal cap 16 has a general annular shape made of a radial wall 28 and of a cylindrical wall 30, the annulus being opened to delimit an intermediate free space 32, or gap, between the two circumferential ends 34, 36 of the terminal cap 16.
  • the terminal cap 16 has, near a first circumferential end 34, a step portion 38 onto which the corresponding coil termination 40 comes into abutment and is attached by welded or soldered connection such that said coil termination 40 is in electrical contact with the terminal cap 16.
  • the second circumferential end 36 of the terminal cap 16 has a reduced axial thickness, with regards to the first circumferential end 34, such that said second circumferential end 36 is not in electric contact with the adjacent coil portion, delimiting an axial gap 42 with said coil portion.
  • the cylindrical wall 30 length decreases essentially continuously from the first circumferential end 34 to the second circumferential end 36.
  • the terminal cap 16 prolongs the coil 18 from its termination 40 and forms the last turn of the coil.
  • the terminal cap 16 is made of non ferrous material such as copper material.
  • a salient finger 26 is provided on the terminal ferrule 20 to contact with the terminal cap 16 for connecting the terminal ferrule 20 to the coil 18.
  • the inductance L can be adjusted since the circumferential position of the salient finger 26 contact point determines the coil length and the coil last turn length.
  • the circumferential position of the salient finger 26 is selected during the manufacturing process of the resonance structure 12 and, once it has been selected, the salient finger 26 is fixed permanently to the terminal cap 16, for example by welding or soldering.
  • the terminal ferrule 20 has an essentially tubular shape with an upper free end 44 to be connected to a complementary connector element (not shown) of the generator 10.
  • the lower end 46 of the terminal ferrule 20 is provided with a formed cup 22 coaxial with the core member 24 of the resonance structure 12 and designed to be received in the upper end portion of the central bore 48 extending through out the core member 24.
  • the salient finger 26 is formed of a tab 50 extending radially from the peripheral outer edge 52 of the formed cup 22 and having a radial upper surface 54 and a radial lower surface 56, said radial lower surface 56 being in flat contact against the radial wall 28 of the terminal cap 16.
  • the salient finger 26 is made of one piece with the formed cup 22.
  • the formed cup 22 could be replaced by a tubular portion 58 arranged at the inner end of the salient finger 26 and the terminal ferrule 20 is fitted into said tubular portion 58.
  • the formed cup 22 could be replaced by a tubular portion 58 arranged at the inner end of the salient finger 26 and the terminal ferrule 20 is fitted into said tubular portion 58.
  • the core member 24 and the coil 18 are encapsulated in a dielectric insulator 60 and received in a metallic sleeve housing 62.
  • each coil termination may be provided with a similar terminal cap 16 for allowing inductance L adjustment from each end of the resonance structure 12.
  • the present invention also proposes a method of manufacturing a high frequency resonance based ignition system comprising a generator 10, a resonance structure 12, and a heat release interface 14, wherein the manufacturing of the resonance structure 12 comprises the following steps:

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Spark Plugs (AREA)

Abstract

High frequency resonance based ignition system comprising a generator, a resonance structure, and a heat release interface, the resonance structure having a high frequency coil, characterized in that it further comprises a tuning element provided for varying the inductance to the desired resonance frequency during the manufacturing of the parts.

Description

High frequency ignition system
TECHNICAL FIELD
The present invention relates generally to an ignition system for direct injection combustion engine.
BACKGROUND OF THE INVENTION The traditional ignition system consists of a sparkplug acting as an electrical feed into a combustion chamber of a gasoline engine, providing concentrated thermal energy release, in the form of a spark, to initiate the combustion. A conventional transformer is used, incorporating electronics to condition and to feed energy from the electrical network in vehicles (Battery, Generator).
Future direct injection combustion systems are targeting stratified fuel injection, promising significant fuel reduction at low speed and partial load. These stratified gasoline mixtures tend to be difficult to ignite with existing ignition systems, mostly because of the limited energy and the very local distribution of the released heat of the spark itself.
Alternatives are intelligently controlled resonance structures which allow emitting heat over larger space, constant over time, and at extended time compared to existing ignition systems. These systems require at minimum, the resonance structure, and a driving generator. As shown on figure 1 , a resonance based ignition system comprises of a resonator 10, a generator 10 and a heat release interface 14. The resonance structure is operated beneficially under ISM (Industrial Scientific and Medical) radio bands, which were originally reserved internationally for the use of RF electromagnetic fields for industrial, scientific and medical purposes other than communications.
Beneficial but not exclusive are the following ISM frequencies: 13,56MHz, 27,12MHz, 40,68MHz.
The operating frequency in such a structure is defined by the inductance and capacitance of the structure. Equation 1 : the resonance frequency is: J f / r L „_
The inductance can be described by a helical form, single layer wound, high frequency coil. This structure represents technically a typical capacitive loaded quarter-wave transmission line. The ISM frequency bands suitable for these techniques are very narrow, less than 1% of the resonance frequency. This implies the mechanical elements representing the Coil and capacitor according to equation 1 have to be built to suit the target ISM frequency. At or close to the resonance frequency such ignition system will provide sufficient voltage to break the dielectric environment inside the combustion chamber, which is needed to release the heat to ignite the gasoline mixtures.
However, the geometric realistic tolerances of the characteristic elements (12, 14) will imply that a significant portion of parts built will have their resonance frequency outside the required ISM band. It is an objective of the present invention to solve the above mentioned problem in a simple and economic way.
SUMMARY OF THE INVENTION
In order to solve the above mentioned problem, the present invention provide a tuning feature at the High Frequency (HF) coil termination which is an integral part of a resonance based ignition system in the low to mid RF range.
The tuning feature is provided at the lowest voltage side of the resonance structure which is the feeding connection between the HF generator and the HF Resonator. At the low voltage side of the helical coil, voltages inferior to 2.000 Volt (peak) can be expected, which allows the operation of such tuning interfaces with conventional means, even using air as dielectric insulation. The tuning element varies the inductance to the desired Frequency. Variable capacitance adjustment could be achieved from another tuning device to give additional adjustment if required. The invention provides a high frequency resonance based ignition system comprising a generator, a resonance structure, and a heat release interface, the resonance structure having a high frequency coil with terminations and a terminal ferrule connecting the low voltage input of the generator to a first coil termination, characterized in that it further comprises a tuning element provided for adjusting the inductance to the desired resonance frequency during the manufacturing of the resonance structure, said tuning element comprising : - a formed terminal cap connected to a coil termination in order to form the last turn of the coil, and
- a salient finger provided on the terminal ferrule to contact with the terminal cap for connecting the low voltage input to the resonance structure via the terminal cap, the inductance being adjusted depending on the circumferential position of the salient finger with regards to the terminal cap.
The invention allows overcoming tiny manufacturing tolerance in the manufacturing of the resonance structure.
According to other features of the present invention: - the terminal cap has a brake around its circumference to emulate the last turn of the coil;
- the permanent connection of the terminal cap to the terminal of the coil is done by welding or soldering;
- said terminal cap is anchored on the low voltage end of the resonance structure;
- an additional tuning device is provided for variable capacitance adjustment;
- the bottom part of the ferrule is provided with a coaxial cup member designed to be received in the tubular end of the core member of the resonance structure, and the salient finger extends radially from a peripheral edge of the cup member;
- said salient finger extends radially and is provided with a tubular portion coaxial to the terminal ferrule, said terminal ferrule being inserted into the tubular portion; - each coil termination is provided with a similar terminal cap for allowing inductance adjustment from each end of the resonance structure; The present invention also proposes a method of manufacturing said high frequency resonance based ignition system as further explained in the following description.
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention is now described by way of example with reference to the accompanying drawings in which:
- figure 1 is a bloc-diagram showing a resonance based ignition system;
- figure 2 is a schematic perspective view showing partially the resonance structure according to the invention;
- figure 3 is a similar view to the view of figure 2 showing more particularly the terminal cap of the resonance structure without the terminal part of the structure;
- figure 4 is a similar view to the view of figure 2 showing more particularly the terminal part of the resonance structure comprising a terminal ferrule and a salient finger;
- figure 5 is a cross section view showing an alternative embodiment of the terminal cap, salient finger and ferrule of figure 4.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
According to the present invention, it is provided a resonance structure 12 having a variable last turn HF coil termination, anchored on the low voltage end of the resonator, comprising of a formed terminal cap 16 of sufficient conductive material permanently connected to the HF inductor coil 18 by means of weld or solder. The terminal cap 16 has a brake around its circumference to emulate the last turn of the coil 18. The form of the contact surface of the terminal cap 16 can have ripples divided into equal parts of constant degrees for enhancing the mating terminal location, or of a smooth surface as shown in figure 3.
A terminal ferrule 20 connects the low voltage input to the resonator 12 via the terminal cap 16. This terminal ferrule 20 has the addition of a formed shape 22 that is used to position and secure the part into the core 24 of the resonator 12. It is also isolated from the terminal cap 16. The terminal ferrule 20 has a salient finger 26 used to contact with the terminal cap 16, as shown in figure 4.
After the terminal cap 16 and the terminal ferrule 20 have been assembled a calibration is made to fine tune the resonance frequency F which is affected by equation 1. A weld or solder process is then carried out to permanently connect the terminals, in order to obtain the assembly as shown in figure 2.
It has to be noted that the resonance structure 12 has to withstand high voltages for its ignition function, and due to the nature of a quarter- wave transmission line, the high voltage will be built up along the helical coil 18. As can be seen on figures 2 and 3, the terminal cap 16 has a general annular shape made of a radial wall 28 and of a cylindrical wall 30, the annulus being opened to delimit an intermediate free space 32, or gap, between the two circumferential ends 34, 36 of the terminal cap 16. The terminal cap 16 has, near a first circumferential end 34, a step portion 38 onto which the corresponding coil termination 40 comes into abutment and is attached by welded or soldered connection such that said coil termination 40 is in electrical contact with the terminal cap 16.
As can be seen on the figures, the second circumferential end 36 of the terminal cap 16 has a reduced axial thickness, with regards to the first circumferential end 34, such that said second circumferential end 36 is not in electric contact with the adjacent coil portion, delimiting an axial gap 42 with said coil portion. Preferably, the cylindrical wall 30 length decreases essentially continuously from the first circumferential end 34 to the second circumferential end 36. Thus, the terminal cap 16 prolongs the coil 18 from its termination 40 and forms the last turn of the coil.
Preferably, the terminal cap 16 is made of non ferrous material such as copper material.
As represented on figures 2, 4, and 5, a salient finger 26 is provided on the terminal ferrule 20 to contact with the terminal cap 16 for connecting the terminal ferrule 20 to the coil 18. Depending on the salient finger 26 contact point on the radial wall 28 of the terminal cap 16, the inductance L can be adjusted since the circumferential position of the salient finger 26 contact point determines the coil length and the coil last turn length. The circumferential position of the salient finger 26 is selected during the manufacturing process of the resonance structure 12 and, once it has been selected, the salient finger 26 is fixed permanently to the terminal cap 16, for example by welding or soldering.
Advantageously, considering the figures, the terminal ferrule 20 has an essentially tubular shape with an upper free end 44 to be connected to a complementary connector element (not shown) of the generator 10. The lower end 46 of the terminal ferrule 20 is provided with a formed cup 22 coaxial with the core member 24 of the resonance structure 12 and designed to be received in the upper end portion of the central bore 48 extending through out the core member 24.
The salient finger 26 is formed of a tab 50 extending radially from the peripheral outer edge 52 of the formed cup 22 and having a radial upper surface 54 and a radial lower surface 56, said radial lower surface 56 being in flat contact against the radial wall 28 of the terminal cap 16. Advantageously, the salient finger 26 is made of one piece with the formed cup 22.
According to an alternative embodiment which is shown on figure 5, the formed cup 22 could be replaced by a tubular portion 58 arranged at the inner end of the salient finger 26 and the terminal ferrule 20 is fitted into said tubular portion 58. As can be seen on figure 5, at the final stage of the resonance structure
12 assembly, the core member 24 and the coil 18 are encapsulated in a dielectric insulator 60 and received in a metallic sleeve housing 62.
The salient finger 26 and the terminal ferrule 20 are made of electrically conductive material. According to an alternative embodiment (not shown), each coil termination may be provided with a similar terminal cap 16 for allowing inductance L adjustment from each end of the resonance structure 12.
The present invention also proposes a method of manufacturing a high frequency resonance based ignition system comprising a generator 10, a resonance structure 12, and a heat release interface 14, wherein the manufacturing of the resonance structure 12 comprises the following steps:
- providing a core member 24, - arranging a high-frequency inductor coil 18 around the core member 24,
- arranging a terminal cap 16 at a first end of the core member 24, said terminal cap 16 being connected to the first coil termination 40 and forming the last turn of the coil 18,
- providing a terminal ferrule 20 with a salient finger 26, said terminal ferrule 20 being connected to said terminal cap 16 via said salient finger 26,
- positioning said salient finger 26 circumferentially with regards to said terminal cap 16 in order to adjust the inductance L to the desired resonance frequency F,
- affixing permanently said salient finger 26 to said terminal cap 16,
- connecting the low voltage input of the generator 10 to said terminal ferrule 20.

Claims

1. High frequency resonance based ignition system comprising a generator (10), a resonance structure (12), and a heat release interface (14), the resonance structure (12) having a high frequency coil (18) with terminations (40) and a terminal ferrule (20) connecting the low voltage input of the generator (10) to a first coil termination (40), characterized in that it further comprises a tuning element (16, 26) provided for adjusting the inductance (L) to the desired resonance frequency (F) during the manufacturing of the resonance structure (12), said tuning element (16, 26) comprising :
- a formed terminal cap (16) connected to a coil termination (40) in order to form the last turn of the coil (18), and
- a salient finger (26) provided on the terminal ferrule (20) to contact with the terminal cap (16) for connecting the low voltage input to the resonance structure (12) via the terminal cap (16), the inductance (L) being adjusted depending on the circumferential position of the salient finger (26) with regards to the terminal cap (16).
2. System according to claim 1, characterized in that the terminal cap (16) has a brake around its circumference to emulate the last turn of the coil (18).
3. System according to claim 1 or 2, characterized in that the permanent connection of the terminal cap (16) to the terminal (40) of the coil (18) is done by welding or soldering.
4. System according to any of the preceding claims, characterized in that said terminal cap (16) is anchored on the low voltage end of the resonance structure (12).
5. System according to any of the preceding claims, characterized in that an additional tuning device is provided for variable capacitance adjustment.
6. System according to anyone of the preceding claims, characterized in that the bottom part of the ferrule (20) is provided with a coaxial cup member (22) designed to be received in the tubular end of the core member (24) of the resonance structure (12), and in that the salient finger (26) extends radially from a peripheral edge (52) of the cup member (22).
7. System according to any of claims 1 to 5, characterized in that said salient finger (26) extends radially and is provided with a tubular portion (58) coaxial to the terminal ferrule (20), said terminal ferrule (20) being fitted into the tubular portion (58).
8. System according to any of the preceding claims, characterized in that each coil termination (40) is provided with a similar terminal cap (16) for allowing inductance (L) adjustment from each end of the resonance structure (12).
9. Method of manufacturing a high frequency resonance based ignition system comprising a generator (10), a resonance structure (12), and a heat release interface (14), wherein the manufacturing of the resonance structure (12) comprises the following steps: - providing a core member (24),
- arranging a high-frequency inductor coil (18) around the core member (24),
- mounting a terminal ferrule (20) at a first end of the core member (24),
- connecting said terminal ferrule (20) to a first coil termination (40), - connecting the low voltage input of the generator (10) to said terminal ferrule (20), characterized in that it further comprises the following steps:
- arranging a terminal cap (16) at said first end of the core member (24), said terminal cap (16) being connected to the first coil termination (40) and forming the last turn of the coil (18),
- providing said terminal ferrule (20) with a salient finger (26), said terminal ferrule (20) being connected to said terminal cap (16) via said salient finger (26), - positioning said salient finger (26) circumferentially with regards to said terminal cap (16) in order to adjust the inductance (L) to the desired resonance frequency (F),
- affixing permanently said salient finger (26) to said terminal cap (16).
PCT/EP2009/063121 2008-10-13 2009-10-08 High frequency ignition system WO2010043546A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP08166512 2008-10-13
EP08166512.7 2008-10-13

Publications (1)

Publication Number Publication Date
WO2010043546A1 true WO2010043546A1 (en) 2010-04-22

Family

ID=40427832

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/063121 WO2010043546A1 (en) 2008-10-13 2009-10-08 High frequency ignition system

Country Status (1)

Country Link
WO (1) WO2010043546A1 (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB574775A (en) * 1942-09-07 1946-01-21 British Thomson Houston Co Ltd Improvements in high frequency electrical ignition systems
US3381675A (en) * 1965-09-29 1968-05-07 Edward L Schiavone High-frequency ignition system
US4222022A (en) * 1978-07-10 1980-09-09 Thomson-Csf Variable inductor
US5179928A (en) * 1989-07-13 1993-01-19 Siemens Aktiengesellschaft Internal combustion engine ignition device
DE19609475A1 (en) * 1996-03-11 1997-09-18 Wolfgang H Dipl Ing Hunck High frequency capacitor ignition source for IC engine esp fluid combustion turbine
EP0812066A1 (en) * 1995-12-25 1997-12-10 Matsushita Electric Industrial Co., Ltd. High-frequency device
WO2007017481A1 (en) * 2005-08-05 2007-02-15 Siemens Aktiengesellschaft Plasma ignition system and method for the operation thereof
WO2007071865A1 (en) * 2005-12-15 2007-06-28 Renault S.A.S Optimization of the excitation frequency of a resonator
WO2008113956A2 (en) * 2007-03-01 2008-09-25 Renault S.A.S Control of a plurality of plug coils via a single power stage

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB574775A (en) * 1942-09-07 1946-01-21 British Thomson Houston Co Ltd Improvements in high frequency electrical ignition systems
US3381675A (en) * 1965-09-29 1968-05-07 Edward L Schiavone High-frequency ignition system
US4222022A (en) * 1978-07-10 1980-09-09 Thomson-Csf Variable inductor
US5179928A (en) * 1989-07-13 1993-01-19 Siemens Aktiengesellschaft Internal combustion engine ignition device
EP0812066A1 (en) * 1995-12-25 1997-12-10 Matsushita Electric Industrial Co., Ltd. High-frequency device
DE19609475A1 (en) * 1996-03-11 1997-09-18 Wolfgang H Dipl Ing Hunck High frequency capacitor ignition source for IC engine esp fluid combustion turbine
WO2007017481A1 (en) * 2005-08-05 2007-02-15 Siemens Aktiengesellschaft Plasma ignition system and method for the operation thereof
WO2007071865A1 (en) * 2005-12-15 2007-06-28 Renault S.A.S Optimization of the excitation frequency of a resonator
WO2008113956A2 (en) * 2007-03-01 2008-09-25 Renault S.A.S Control of a plurality of plug coils via a single power stage

Similar Documents

Publication Publication Date Title
US5706792A (en) Integrated ignition coil and spark plug
CN102619667B (en) Corona ignition device
US8278807B2 (en) Radiofrequency plasma generation device
JP5423417B2 (en) High frequency plasma ignition device
JP2008516498A (en) Antenna feed structure
JP2018514905A5 (en)
EP3129640A1 (en) Dual signal coaxial cavity resonator plasma generation
CN1630961B (en) Multiband antenna and its producing method
US7170380B2 (en) Ignition coil
CN103967684A (en) Corona ignition device
EP2319144B1 (en) Ignition coil with spaced secondary sector windings
EP3172430B1 (en) Ignition unit and system
US6650057B2 (en) Magnetron and microwave heating device
WO2010043546A1 (en) High frequency ignition system
KR100225220B1 (en) Microwave apparatus
JP4590699B2 (en) Ignition coil device
JP6397687B2 (en) AC ignition device
JP4506078B2 (en) Electromagnetic device and high voltage generator
WO2016024563A1 (en) Ignition device
WO2010043543A1 (en) Arrangement for spark plug centre electrode connection with ignition coil
JP6698454B2 (en) Ignition device
WO2021085339A1 (en) Noise prevention resistor and manufacturing method thereof
EP3663572A1 (en) Ignition unit and motorized product
JP5858536B2 (en) Ignition system
MXPA97010015A (en) Spark plug and ignition coil integra

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09783864

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09783864

Country of ref document: EP

Kind code of ref document: A1