Having A Specific Ignition Coil Patents (Class 123/634)
  • Patent number: 7353813
    Abstract: An engine generating two or more ignition sparks by the same spark plug, which can avoid a torque reduction caused by misfire of main ignition, can start firing and burning at proper timing depending on operating conditions, and can reduce misfires. A novel controller and a novel ignition coil adapted for realizing that engine are also provided. One spark plug and at least one ignition coil are provided per cylinder. When performing a plurality of ignitions during the compression stroke in the cylinder, before main ignition to start firing and burning at proper timing depending on operating conditions of the engine, preliminary pre-ignition is performed to form a fire seed around the spark plug. The main ignition is then performed to cause main burning. Misfire is avoided, appropriate torque can be generated, and combustion stability can be improved.
    Type: Grant
    Filed: February 13, 2006
    Date of Patent: April 8, 2008
    Assignee: Hitachi, Ltd.
    Inventor: Takuya Shiraishi
  • Publication number: 20080047534
    Abstract: An ignition coil assembly for an engine includes an ignition coil for supplying a voltage to a spark plug, a housing supporting the ignition coil, a driving circuit board disposed on the housing and including a circuit unit controlling the ignition coil, and a center cover protecting the driving circuit board. The ignition coil is electrically connected to the driving circuit board.
    Type: Application
    Filed: November 22, 2006
    Publication date: February 28, 2008
    Inventor: Seongmin Park
  • Patent number: 7332991
    Abstract: A twin spark ignition apparatus having two high-voltage (HV) outputs incorporates features for balancing load capacitance on each HV output. The ignition apparatus provides a first high-voltage (HV) connection configured for direct mounting on a first spark plug, and a second HV connection for coupling to a second spark plug by way of an HV cable. The HV cable adds capacitance at the second HV output, as compared to a direct mount. The secondary winding is shifted by a predetermined distance, relative to the primary winding, in direction toward the direct mount end of the ignition apparatus. The shifting reduces the internal load capacitance at the second end (top), so that when the capacitance added by the HV cable is considered, the respective load capacitances are balanced. The voltage variation between the two HV outputs is reduced.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: February 19, 2008
    Assignee: Delphi Technologies, Inc.
    Inventors: Albert A. Skinner, Harry O. Levers
  • Publication number: 20080022985
    Abstract: An ignition coil includes primary and secondary coils. The primary coil includes a primary spool and a primary winding wound on the spool. The primary winding has a second winding layer wound around a first winding layer. The primary spool has first and second overhangs protruding radially outwardly from a first spool end portion of the primary spool. The first overhang is positioned away from the second overhang toward a second spool end portion. The first winding layer has a first winding end portion extending from the first winding layer through a space between the first overhangs, and being wound on the first spool end portion between the first and second overhangs. The second winding layer has a second winding end portion extending from the second winding layer between the first overhangs, and being wound on the first spool end portion between the first and second overhangs.
    Type: Application
    Filed: July 13, 2007
    Publication date: January 31, 2008
    Applicant: DENSO CORPORATION
    Inventor: Norihito Fujiyama
  • Publication number: 20080022984
    Abstract: An ignition coil is inserted into a plughole of an engine. The ignition coil includes a coil case accommodating a primary coil and a secondary coil, and extending to define a cylindrical mount portion on a high voltage side. The mount portion includes a high voltage terminal conductive with the secondary coil. A coil spring conducts the high voltage terminal with the sparkplug. A plug cap has a circumferential portion attached to the mount portion. The plug cap circumferentially surrounds the high voltage terminal, the coil spring, and the sparkplug. The mount portion has a substantially annular space communicating with an inner gap in the coil case, and charged with an infilling resin to have a first resin high voltage end located on the high voltage side with respect to a low voltage end of the circumferential portion of the plug cap on a low voltage side.
    Type: Application
    Filed: July 11, 2007
    Publication date: January 31, 2008
    Applicant: DENSO CORPORATION
    Inventors: Kengo Nakao, Norihito Fujiyama
  • Publication number: 20080006254
    Abstract: An ignition apparatus for an internal combustion engine can eliminate connecting leads for electrically connecting between an igniter and a connector can be eliminated or shortened. In the ignition apparatus, individual terminals (14a, 14b, 15a, 15b) in the form of connector side terminals of an igniter (9) are directly connected to individual terminals (10a, 10b, 11a, 11b) in the form of input terminals of a connector (8), and individual terminals (18a, 18b, 19a) in the form of transformer side terminals of the igniter (9) are directly connected to individual terminals (16a, 16b, 17a), respectively, which are winding terminals of a transformer (1).
    Type: Application
    Filed: October 31, 2006
    Publication date: January 10, 2008
    Inventors: Tomohito Matsui, Takeshi Shimizu
  • Patent number: 7317370
    Abstract: An ignition coil includes a coil portion that has a primary coil, a secondary coil, and an outer core. The outer core is arranged on a radially outer side of both the primary coil and the secondary coil. A fitting member, which is in a substantially cylindrical shape, has an inner periphery via which the fitting member is fitted to the outer core. A connector case has a fit hole via which the connector case is fitted to an outer periphery of the fitting member. The connector case connects with an axial end of the coil portion via the fitting member. The fitting member includes an embedded member that is at least partially embedded in the fitting member. The embedded member is formed of a material that is different in Young's modulus from a material constructing the fitting member.
    Type: Grant
    Filed: February 20, 2007
    Date of Patent: January 8, 2008
    Assignee: Denso Corporation
    Inventors: Kiyotoshi Nakamoto, Yoshitaka Satoh
  • Patent number: 7310037
    Abstract: A twin spark ignition apparatus having two high-voltage (HV) outputs incorporates features for balancing load capacitance on each HV output. The ignition apparatus provides a first high-voltage (HV) connection configured for direct mounting on a first spark plug, and a second HV connection for coupling to a second spark plug by way of an HV cable. The HV cable would adds capacitance at the second HV output, as compared to a direct mount. Various structures are included to offset and balance the additional capacitance attributable to the HV cable so that the capacitance of the first HV connection and the second HV connection are balanced within a range. The voltage variation between the two HV outputs is reduced.
    Type: Grant
    Filed: November 6, 2006
    Date of Patent: December 18, 2007
    Assignee: Delphi Technologies, Inc.
    Inventors: Albert A. Skinner, Harry O. Levers, Colin J. Hamer, Mark A. Paul
  • Publication number: 20070277795
    Abstract: An ignition coil, which is adapted to being mounted to a sparkplug, includes a coil body having a primary coil and a secondary coil. The ignition coil further includes a plug cap provided to an axial end of the coil body. The coil body is adapted to being mounted to the sparkplug via the plug cap. The plug cap has a plug-fitting hole adapted to being axially fitted to an insulator of the sparkplug. The plug cap has an end surface defining the plug-fitting hole. The end surface includes circumferential portions respectively located at axial positions each being different from each other with respect to a circumferential direction.
    Type: Application
    Filed: May 17, 2007
    Publication date: December 6, 2007
    Applicant: DENSO CORPORATION
    Inventor: Yoshitaka Satoh
  • Patent number: 7293553
    Abstract: An ignition coil for an internal combustion engine has a rod-shaped magnetic core, which is situated within a secondary coil shell. The annular interspace between the magnetic core and the secondary coil shell is filled with an electrically insulating molded material. To prevent the formation of tears in the molded material during thermo-mechanical loading, or the spread of such tears such that the operativeness of the ignition coil is adversely affected, a separation element is provided, which divides the molded material into at least two mutually separate regions.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: November 13, 2007
    Assignee: Robert Bosch GmbH
    Inventors: Konstantin Lindenthal, Nikolaus Hautmann, Markus Knepper
  • Patent number: 7287524
    Abstract: An internal combustion engine ignition device is provided with a connector including first external connection terminal, and second external connection terminal. The first external connection terminals is formed with no noble metal coat, while the second external connection terminal is formed with a noble metal coat. The first external connection terminal is disposed on the outer side of terminal arrangement in the connector, and the second external connection terminal is disposed on the center side of terminal arrangement in the connector.
    Type: Grant
    Filed: June 8, 2006
    Date of Patent: October 30, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazuya Hamada, Takeshi Shimizu
  • Publication number: 20070246029
    Abstract: An ignition coil for an internal combustion engine includes: an iron core; a primary coil wound around the iron core via a primary bobbin; a secondary coil provided to externally surround the primary coil; a ground terminal fitting placed with a part thereof being held between the primary bobbin and the iron core; and a resin-molded portion provided to cover the primary coil and the secondary coil, a ground side terminal portion of the primary coil being connected to the ground terminal fitting, wherein at least one protrusion is formed in the part of the ground terminal fitting held between the primary bobbin and the iron core, and the protrusion has a pointed tip that is brought into contact with the iron core.
    Type: Application
    Filed: April 24, 2007
    Publication date: October 25, 2007
    Applicant: Kokusan Denki Co., Ltd.
    Inventor: Takuma Ayusawa
  • Patent number: 7267116
    Abstract: A power-saving type of ignition apparatus is provided with a spark plug of which electrodes (30, 40) are regulated in their shapes to lower an amount of energy required for its ignition. To face to a tip (31) of a center electrode (30) extending from a mounting bracket (10), a cylindrical protrusion (41) is built on one surface (43) of an earth electrode (40). The protrusion extends toward the center electrode to form a discharge gap (50) between the protrusion and the tip of the center electrode. Both of the tip of the center electrode and the protrusion of the earth electrode are 2.3 [mm] or less in each diameter (D1, D2), thus an amount of energy required for ignition being limited to 17 [mJ] or less.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: September 11, 2007
    Assignees: DENSO Corporation, Nippon Soken, Inc.
    Inventors: Tetsuya Miwa, Tohru Yoshinaga, Keiji Kanao, Shinichi Okabe
  • Patent number: 7234454
    Abstract: An ignition coil is disclosed. The ignition coil includes an insulative material, a body, and a head coupled to the body. A portion of the insulative material is included in the body, and a portion of the insulative material is included in the head. The head includes a casing, a flange for coupling to an engine case, and a connector adapted to be connected to an external device. The head also includes a conducting terminal with a connector pin, an exposed contact, and a connecting part. The connector pin is coupled to the connector, the exposed contact is coupled to the casing or the flange, and the connecting part couples the exposed contact and the connector pin. A portion of the connecting part is embedded in the insulative material, and wherein a remaining portion is embedded in the casing. A method of manufacturing the ignition coil is also disclosed.
    Type: Grant
    Filed: July 6, 2006
    Date of Patent: June 26, 2007
    Assignee: DENSO Corporation
    Inventors: Takashi Tauchi, Koji Tsunenaga, Kazuhide Kawai, Katsutoshi Shibata
  • Patent number: 7228854
    Abstract: An ignition coil apparatus for an internal combustion engine can improve the ignition performance of the engine in an entire rotation range. The ignition coil apparatus is arranged in a plug hole formed in the engine, and includes a case (1), a center core (2) arranged on a central axis of the case (1), and a primary coil (3) and a secondary coil (4) both arranged on an outer periphery of the center core (2). Magnets (20) are arranged on the opposite end faces, respectively, of the center core (2) for applying a magnetic force thereto in a direction opposite to the direction of magnetic flux lines generated when a primary current (i1) is supplied to the primary coil (3), and the primary coil (3) has a resistance, an upper limit value of which is 1.2 ?.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: June 12, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Iwa, Nobuyuki Sawazaki
  • Patent number: 7228853
    Abstract: An ignition apparatus includes a high voltage (HV) terminal to which a high voltage end of the secondary winding is attached. The ignition apparatus further includes an electrically conductive cup configured to surround the high voltage terminal when the secondary winding spool is inserted in the case. The high voltage terminal has one end that comes into engagement with an inner annular surface of the cup. Electromagnetic interference suppression is provided by a resistor disposed between the cup and a high voltage connector assembly that connects to a spark plug. The resistor is formed of electrically conductive plastic material.
    Type: Grant
    Filed: December 5, 2005
    Date of Patent: June 12, 2007
    Assignee: Delphi Technologies, Inc.
    Inventors: Albert Anthony Skinner, Colin Hamer
  • Patent number: 7222616
    Abstract: A stick ignition coil apparatus for an ignition plug includes a primary coil arrangement, a secondary coil arrangement, a center core, a coil case, a high voltage terminal, a spring case and dielectric resin. The primary coil arrangement is located radially outward of the secondary coil arrangement, which is located radially outward of the center core. The coil case is located radially outward of the primary coil arrangement. The high voltage terminal is located at a distal end of the secondary coil arrangement. The spring case holds a spring. The dielectric resin is filled in a space defined radially inward of the coil case. An open end of the high voltage terminal is connected to an annular corner portion of a distal projecting portion of a secondary spool of the secondary coil.
    Type: Grant
    Filed: July 15, 2005
    Date of Patent: May 29, 2007
    Assignee: Denso Corporation
    Inventors: Shouichi Takeyama, Masahiko Aoyama, Kazuhide Kawai
  • Patent number: 7213588
    Abstract: To provide an ignition device for an internal combustion engine which for example prevents a crack from being made in a cast insulating resin or a transformer output voltage control element from being damaged.
    Type: Grant
    Filed: August 12, 2005
    Date of Patent: May 8, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Iwa, Shigemi Murata
  • Patent number: 7182077
    Abstract: A high energy density and high efficiency inductive ignition coil for IC engine achieved by the use of biasing magnets (14/15) located at the end (16/17) of an open-E laminated core to raise the coil energy to five times typical, i.e. of approximately 150 mj and to double the coil efficiency including novel use of coil winding structure (12/13/20/21) with a primary winding turns (Np) of between 70 and 86 and primary inductance Lp of between 700 uH and 1,100 uH, and a low turns ratio (Nt) of 53 to 67 allowing for a short, efficient, cylindrical coil, with secondary turns (Ns) of 4,000 to 5,000 turns with current of approximately 330 ma which is predominantly in the high glow and low arc discharge mode, with a special ratio R defined as Np/Nt and equal to between 1.15 to 1.45, and the coil being small and light enough to be directly mounted on the spark plugs or near the plugs in a region of high squish flow in an engine.
    Type: Grant
    Filed: May 23, 2006
    Date of Patent: February 27, 2007
    Inventor: Michael A. V. Ward
  • Patent number: 7178513
    Abstract: A high energy inductive coil-per-plug ignition system operating at a higher voltage Vc than battery voltage Vb by use of boost-type power converter (1), using high energy density low inductance coils Ti which are further improved by partial encapsulation of the coils and by use of biasing magnets (120) in the large air gaps in the core to increase coil energy density, the coils connected to capacitive type spark plugs, with improved halo-disc type firing ends, by means of improved suppression wire (78), the system operated and controlled by a micro-controller (8) to generate and control the coil charge time Tch, the sequencing the spark firing, and other control features including finding the firing cylinder by simultaneous ignition firing and sensing during engine cranking, to provide a highly controlled and versatile ignition system capable of producing high energy flow-coupling ignition sparks with relatively fewer and smaller parts.
    Type: Grant
    Filed: April 19, 2003
    Date of Patent: February 20, 2007
    Inventor: Michael A. V. Ward
  • Patent number: 7152593
    Abstract: An ignition terminal assembly including a serpentine conduction element having an end and a formed terminal connected to said end.
    Type: Grant
    Filed: April 12, 2005
    Date of Patent: December 26, 2006
    Assignee: Pent Technologies, Inc.
    Inventor: Ken Sikora
  • Patent number: 7152591
    Abstract: An ignition apparatus for an internal combustion engine can suppress radiation noise radiated into air from a discharge current path, thereby preventing the malfunction of electrical equipment mounted on a vehicle. The ignition apparatus includes a transformer having a primary winding and a secondary winding, a conductor for impressing a high voltage generated at a high voltage side of the secondary winding upon interruption of a primary current to the primary winding to a spark plug, a plug boot enclosing the conductor so as to electrically insulate it from the outside and to hold the spark plug, and a metal sleeve arranged to enclose the plug boot and having one end thereof electrically connected directly or indirectly to a low voltage side of the secondary winding, and the other end thereof electrically connected directly or indirectly to the spark plug.
    Type: Grant
    Filed: May 17, 2006
    Date of Patent: December 26, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masayoshi Maeda, Takeshi Shimizu
  • Patent number: 7152592
    Abstract: An ignition coil includes a primary coil carrying primary coil body, a low voltage connection area and a secondary coil inductively coupled with the primary coil for the provision of a high voltage for a spark plug of the combustion engine. The secondary coil is carried on a secondary coil body concentrically enclosed by the primary coil body. A high voltage connection area is provided, in which the secondary coil contacts the spark plug. The secondary coil body encloses a cylindrical, magnetic core, and primary coil body and secondary coil body are both surrounded by an electrically and magnetically conductive shell. The shell includes a longitudinal slit therethrough. The primary coil includes an uneven number of layers. A remote extending coil lead from the low voltage connection is led along the longitudinal slit of the shell. The coil lead runs at least partially within the outer perimeter of the shell.
    Type: Grant
    Filed: January 21, 2005
    Date of Patent: December 26, 2006
    Assignee: Pulse GmbH
    Inventor: Friedhelm Rosemann
  • Patent number: 7148780
    Abstract: An ignition apparatus having twin spark high-voltage outputs incorporates features of a pencil coil wherein at least a portion of a transformer assembly is disposed within a spark plug well when installed in an internal combustion engine, thereby reducing the space required on the top of the engine. A secondary winding spool is configured to retain a secondary winding in first and second portions, wound either the same way for use in waste spark ignition systems or in opposite orientations for two-plug-per-cylinder systems. An alternate configuration includes an isolated shield that is internal to the case.
    Type: Grant
    Filed: January 24, 2005
    Date of Patent: December 12, 2006
    Assignee: Delphi Technologies, Inc.
    Inventors: Albert Anthony Skinner, Colin Hamer, Mark Albert Paul, Harry Oliver Levers, Jr.
  • Patent number: 7059312
    Abstract: An ignition unit for igniting propellants having at least one electrically conductive pin with a pin holder comprising a metal ring which encloses the pin by leaving an annular cavity with an insulating filing in the annular cavity. An electrically conductive bridge or a semi-conductor bridge connects between the metal ring and the pin with a sealing cap which is connected to the one face side of the pin holder and which receives the propellant. A plug can be connected in a positive or non-positive way with the metal ring on its end averted from the sealing cap and which enters into an electrically conductive connection with the pin in operation. At least one of the two elements, either the metal ring or the plug are provided with a coating in the region between the mutual connection, which coating has a low electric contact resistance between the plug and the metal ring.
    Type: Grant
    Filed: May 10, 2004
    Date of Patent: June 13, 2006
    Assignee: Schott AG
    Inventors: Adolf Olzinger, Richard Bender
  • Patent number: 7036495
    Abstract: Provided is an ignition device for an internal combustion engine which prevents a crack from being produced in a cast insulating resin, and a noise-suppressing resistor from being damaged. An ignition device for an internal combustion engine according to the present invention includes a case (3), a cast insulating resin (4), a high-voltage connection terminal (7), and a noise-suppressing resistor (8). The case (3) is composed of a case body (3a) receiving a transformer (2) and a high-voltage tower (3b) having an opening portion (5), and the case body (3a) and the high-voltage tower (3b) communicate with each other through the opening portion (5). The cast insulating resin (4) is injected into the case body (3a) and cured, thus insulating and fixing the transformer (2). The high-voltage connection terminal (7) closes the opening portion (5) such that the cast insulating resin (4) that has not been cured is prevented from entering the high-voltage tower (3b).
    Type: Grant
    Filed: June 8, 2005
    Date of Patent: May 2, 2006
    Assignee: Mitusbishi Denki Kabushiki Kaisha
    Inventor: Takeshi Shimizu
  • Patent number: 7017566
    Abstract: An insulator includes a plug side cylindrical portion having an inner space for accommodating a center electrode and a coil side cylindrical portion extending in a direction departing from a combustion chamber. The high-voltage portion of an ignition coil is entirely accommodated inside the coil side cylindrical portion. According to this arrangement, the coil side cylindrical portion can assure insulation between the high-voltage portion and the low-voltage portion. The portion to be insulated and fixed by an insulating resin is limited only to the secondary winding.
    Type: Grant
    Filed: March 27, 2003
    Date of Patent: March 28, 2006
    Assignee: Denso Corporation
    Inventors: Tetsuya Miwa, Atsuya Mizutani, Takeo Maekawa, Hiromi Hiramatsu
  • Patent number: 7013883
    Abstract: To improve an anti-heat shock performance and an electric field concentration relaxation (an insulation performance) between a secondary coil and a center core, to attain a narrow diameter structure in an individual ignition type ignition coil and further to improve an assembling working of the ignition coil. The individual ignition type ignition coil is adopted to an engine having a plastic head cover. A secondary coil 3 is positioned at an inner side of a primary coil 5 and between a secondary bobbin 2 and a center core 1 a soft epoxy resin 17 is filled up. In the secondary bobbin 2, a secondary coil low voltage side is a potting side of the soft epoxy resin 17 and an inclination having a difference in an inner diameter is provided on the inner diameter in which the secondary coil low voltage side is formed large and secondary coil high voltage side is formed small.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: March 21, 2006
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Junichi Shimada, Noboru Sugiura, Yoichi Anzo, Eiichiro Kondo, Kazutoshi Kobayashi, Takahide Kosai, Toshiaki Ueda
  • Patent number: 7004155
    Abstract: An ignition apparatus for an internal combustion engine can be reduced in size and cost. A plurality of closed magnetic circuit cores (2) are built in a casing (8) and each have an excitation portion (2a) and non-excitation portions (2b). A plurality of coil parts (100) each includes a primary coil (4) and a secondary coil (6) which are arranged to surround the excitation parts (2a) of a corresponding one of the closed magnetic cores (2). The closed magnetic circuit cores (2) are arranged along an axial direction (A) of the coil parts (100) such that adjacent ones of the non-excitation portions (2b), which are those sides of adjacent cores (2) each of which extends from one end of a corresponding excitation portion (2a), overlap each other at least partially in the axial direction (A).
    Type: Grant
    Filed: October 3, 2002
    Date of Patent: February 28, 2006
    Assignee: Mitusbishi Denki Kabushiki Kaisha
    Inventors: Shigemi Murata, Takeshi Shimizu, Mitsuru Koiwa
  • Patent number: 6977572
    Abstract: A stick-shaped ignition coil includes a center core, a primary coil, a secondary coil, and a body case that are substantially coaxially arranged relative to each other. The ignition coil further includes an igniter, a head case, a holder, and an electrically insulative resin. The head case accommodates the igniter. The head case is provided to an upper end portion of the body case. The holder is arranged between the igniter and upper ends of all the center core, the primary coil, and the secondary coil. The electrically insulative resin is filled in a first space, which is formed among the center core, the primary coil, the secondary coil, the body case, and the holder. The holder has at least one resin flow hole, through which epoxy resin is supplied into the first space, and at least one vent hole, through which air in the first space is vented to an outside.
    Type: Grant
    Filed: April 7, 2005
    Date of Patent: December 20, 2005
    Assignee: Denso Corporation
    Inventors: Kazuhide Kawai, Shouichi Takeyama, Masahiko Aoyama
  • Patent number: 6966311
    Abstract: An integrated ignition apparatus has a coil section and a plug section. The coil section has a spring as a connection member internally. The spring electrically connects other inside terminal members of the plug section. When the coil section and the plug section are integrated, the spring is pressed, and resiliently deforms in the axial direction. Spring-back force of the spring maintains electrical connection steadily, and prevents disconnection of the spring and the terminal members due to vibration. This structure prevents failure in electric conduction between the coil section and the plug section.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: November 22, 2005
    Assignee: Denso Corporation
    Inventors: Hiromi Hiramatsu, Masamichi Shibata
  • Patent number: 6948372
    Abstract: The present invention provides a spark plug coil and pressure sensor assembly for providing a spark to a cylinder of an internal combustion engine. The assembly comprises a spark plug configured for mounting in a cylinder and a pressure sensor associated with the spark plug configured to detect a pressure in the cylinder and generate a pressure signal in response thereto. The assembly includes a first electrically conductive ring connector configured to receive the pressure signal and a housing having a main axis and having at least one electrically conductive leaf spring member. The leaf spring member is configured to resiliently engage the first electrically conductive ring connector over a first predetermined circumferential angle relative to the main axis of the coil housing.
    Type: Grant
    Filed: January 8, 2004
    Date of Patent: September 27, 2005
    Assignee: Delphi Technologies, Inc.
    Inventors: Albert Anthony Skinner, Raymond O. Butler, Jr., Diane E. Hageman, Ronald J. Kiess
  • Patent number: 6907872
    Abstract: An ignition coil apparatus for an internal combustion engine does not generate a discharge between a high-voltage terminal and an iron core even if a high-voltage cable falls off from a high-voltage side connector, and the overall height thereof can be reduced. An ignition coil has an iron core disposed in a casing to form a closed magnetic circuit, and primary and secondary coils installed on a part of the iron core. A power switch controls electric power supplied to the primary coil. A low-voltage side connector has a terminal electrically connected with the power switch. A high-voltage side connector has a high-voltage terminal electrically connected with the secondary coil. The casing includes a casing main body accommodating the part of the iron core, the primary and secondary coils and the power switch, and a cover integral with the main body for covering a part of the iron core located outside thereof.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: June 21, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazuya Hamada, Takeshi Shimizu
  • Patent number: 6885271
    Abstract: An interesting coil supporting unit for an engine includes an elongated casing and a plurality of coil units. Each coil unit has a coil support portion and an ignition coil. The coil support portions are disposed inside the casing at predetermined intervals. The casing and the respective coil support portions are fastened to a cylinder block by means of a plurality of bolts. In this state, each coil unit is supported by the corresponding bolt so as to be slidable in its radial direction. Therefore, the coil units can be positionally slid in the casing and thereby installed easily on the engine.
    Type: Grant
    Filed: February 18, 2004
    Date of Patent: April 26, 2005
    Assignee: Denso Corporation
    Inventors: Yoshihiro Shimoide, Shigemi Itou
  • Patent number: 6882259
    Abstract: A circuit board for an ignition coil in an internal combustion engine is provided. The ignition coil is in electrical connection with a control module and a spark plug having a pair of gap posts. The ignition coil includes a primary winding having an electrical current, a secondary winding in electrical connection with the spark plug and configured to induce a second electrical current between the gap posts, and an ionization current sensing integrated circuit configured to generate an ionization signal based on the secondary current between the gap posts. The ignition coil also includes a circuit board having an ionization connection in electrical connection with the secondary winding and with the ionization current sensing integrated circuit.
    Type: Grant
    Filed: May 5, 2004
    Date of Patent: April 19, 2005
    Assignee: Visteon Global Technologies, Inc.
    Inventors: James J. Klocinski, Michael T. Nation, William D. Walker, Robert C. Bauman, Rick S. Burchett
  • Patent number: 6880539
    Abstract: An ignition apparatus for an internal combustion engine can increase the degree of freedom of wiring paths of electroconductive wires as well as simplifying and miniaturizing a wiring module. Transformers (5A, 5B, 5C) are built into a casing (4) and each includes a core (6), a primary coil (8) and a secondary coil (10) arranged to surround the core for generating a high voltage in the secondary coil (10). A wiring module (20) built into the casing electrically connects the transformers and the switching module with one another. An insulating resin portion (11) fixedly attaches the transformers, the switching module and the wiring module to the casing. The wiring module (20) includes a module main body (22), which is formed by integrating a plurality of conductors (13, 14, 15) with one another through a resin, and flexible electroconductive wires (21) disposed along a surface of the module main body (22).
    Type: Grant
    Filed: November 26, 2002
    Date of Patent: April 19, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshio Maekawa, Takeshi Shimizu, Mitsuru Koiwa
  • Patent number: 6880540
    Abstract: An object of the present invention is to provide an ignition coil which has a structure to make it possible to connect the ignition coil to a spark plug directly and in which an installation space need not be changed largely when the ignition coil is mounted in a cylinder head, and an internal combustion engine ignition system having the ignition coil. In the present invention, a protection metal pipe (31) of an ignition coil (9) is formed so that a rear end side portion of a spark plug (11) in the rear of a rear end surface (23b) of a collar portion (23) in a metal shell (19) can be received in the inside of the protection metal pipe (31) from a front end (31b). The ignition coil (9) has a structure in which the ignition coil (9) is directly connected to the spark plug (11). The protection metal pipe (31) of the ignition coil (9) is formed to serve also as a plughole pipe, so that the outer diameter of the protection metal pipe (31) can be enlarged up to the outer diameter of a conventional plughole pipe.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: April 19, 2005
    Assignee: NGK Spark Plug Co., Ltd.
    Inventors: Tomohiro Fuma, Hiroshi Inagaki, Takahiro Suzuki
  • Patent number: 6877497
    Abstract: An ignition coil cassette having bushings retained by an irregularity of the bushings being encased by epoxy. As a result, the process by which the bushings are installed into the ignition coil cassette avoids the cost associated with the overmolding installation process, and further avoids the potential for damage associated with the ultrasonic insertion process. The irregularity is located generally adjacent one end of each of the bushings and may be, for example, in the form of an undercut or a protrusion.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: April 12, 2005
    Assignee: Delphi Technologies, Inc.
    Inventors: Albert Anthony Skinner, Kenneth P. Senseman, Colin Hamer, Raymond O. Butler, Jr.
  • Patent number: 6851417
    Abstract: An external connection terminal connector as a separate part that mounts the igniter is abolished, and the external connection terminal is integrated with the igniter itself. The igniter has the electronic components mounted on an internal wiring substrate, and the electronic components within the igniter and the external connection terminal are directly connected by wire bonding.
    Type: Grant
    Filed: February 6, 2003
    Date of Patent: February 8, 2005
    Assignee: Diamond Electric Mfg. Co., Ltd.
    Inventors: Masahiro Katayama, Tsuyoshi Yamaguchi, Kazuhiko Okamura, Kouji Hiragi, Kounosuke Inamura
  • Patent number: 6845764
    Abstract: An ignition apparatus includes a secondary winding spool having a secondary winding wound thereon. The secondary winding includes a low voltage end and a high voltage end that is configured for connection to a spark plug. The secondary winding at the high voltage end is configured in accordance with a predetermined radial thickness profile taken in the direction from the high voltage end towards the low voltage end. The profile is determined as a function of (1) a reflected voltage associated with the spark gap breakdown of the spark plug and (2) an induced voltage due to magnetic flux coupled through a central core. The profile is determined so as to reduce layer-to-layer voltage levels in the secondary winding near the high voltage end. The profile can be wound or can be molded in the secondary spool itself.
    Type: Grant
    Filed: January 8, 2004
    Date of Patent: January 25, 2005
    Assignee: Delphi Technologies, Inc.
    Inventors: Albert Anthony Skinner, Viorel N. Moga, Brian Dewayne Lively
  • Patent number: 6834644
    Abstract: An ignition assembly provides a current to a spark plug to combust fuel in a cylinder of an internal combustion engine. The ignition coil assembly includes a primary winding defining a central axis. A secondary winding is wrapped about the primary winding coaxial with the central axis. The ignition coil assembly also includes a central core extending through the primary winding coaxial with the central axis. The central core includes a plurality of core components each having a single exterior surface that is continuous. In addition, each of the single exterior surface extends through an arcuate path.
    Type: Grant
    Filed: February 3, 2004
    Date of Patent: December 28, 2004
    Assignee: Delphi Technologies, Inc.
    Inventors: Albert Anthony Skinner, John E Hazelwood, Thomas B. Bennett
  • Publication number: 20040231652
    Abstract: A center core 1, a secondary coil 3 wound at a secondary bobbin 2 and a primary coil 5 wound at a primary bobbin 4 are placed concentrically inside a coil case 6 in sequence from the inside of the coil case. One end of the secondary coil 3 is connected to the primary coil side and becomes a low-voltage side, and the other side becomes a high-voltage side due to an induced voltage and used with connection to the individual ignition plugs of the internal combustion engine. The radial thickness of the bobbin at the low-voltage side 3a and the high-voltage side 3c of the secondary coil, each located at the both ends of the secondary coil, is made larger than the radial thickness of the bobbin at the center part 3b of the secondary coil. The radial thickness of an insulating layer 8 between the secondary coil 3 and the primary coil 5 at the low-voltage side 3a of the secondary coil is smaller and the radial thickness of the insulating layer at the high-voltage side 3b of the secondary coil is larger.
    Type: Application
    Filed: June 24, 2004
    Publication date: November 25, 2004
    Inventors: Eiichiro Kondo, Junichi Shimada, Yoichi Anzo, Kenji Nakabayashi, Hiroaki Saito
  • Patent number: 6817350
    Abstract: An ignition device for an internal combustion engine has a housing, which includes a first case adjacent to the combustion chamber of the engine and a second case away from the combustion chamber. The first case has a flange formed at its end away from the combustion chamber. The second case has a flange formed at its end adjacent to the combustion chamber. The first case flange faces the side of the second case flange that is away from the combustion chamber. A bolt is screwed into the second case to engage the flanges with each other, substantially integrating the cases with each other.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: November 16, 2004
    Assignee: Denso Corporation
    Inventors: Tetsuya Miwa, Atsuya Mizutani, Hiromi Hiramatsu
  • Publication number: 20040216723
    Abstract: An ignition coil includes a connecting device for contacting a spark plug of an internal combustion engine, the connecting device being designed to have a sleeve made of insulating material. The sleeve is able to be connected at a first end section to a high voltage side of the ignition coil, and at a second end section has an accommodation for the spark plug. Furthermore, in the sleeve at least one conductive contact part, touching the spark plug, is situated for the electrical connection of the ignition coil to the spark plug. At the high voltage side of the ignition coil, between it and the spark plug, a plurality of electrically conductive modular components are able to be positioned, which in the installed state are connected in a detachable, electrically conducting manner.
    Type: Application
    Filed: February 3, 2004
    Publication date: November 4, 2004
    Inventor: Markus Weimert
  • Patent number: 6810868
    Abstract: An ignition coil has an outer coil unit, an inner coil unit, a coil case in which the outer and inner coil units are housed and a tower case accommodating lower parts of outer and inner spools. The outer spool is made of resin material whose bonding strength to resin insulating material, with which the tower case is filled, is weak. An axial leading end of the outer spool is positioned axially away from a reference position by a distance equal to or shorter than 60% of a reference length or by a distance equal to or longer than 90% of the reference length. With this ignition coil, cracks are suppressed on the resin insulating material opposed to the axial leading end of the outer spool otherwise caused by thermal stress.
    Type: Grant
    Filed: February 3, 2003
    Date of Patent: November 2, 2004
    Assignee: Denso Corporation
    Inventors: Koji Tsunenaga, Kazutoyo Osuka, Jyunichi Wada
  • Publication number: 20040194769
    Abstract: There is provided an ignition coil alleviating an insulating load between output terminals and at inside of the ignition coil and stabilizing insulating performance by constituting two outputs from the ignition coil by the same output electrode. Specifically, the invention is characterized in arranging two ignition plugs at a single cylinder, providing a center tap terminal at a secondary coil, regularly winding the secondary coil until reaching the center tap terminal and inversely winding the secondary coil from a regular winding direction to an inverse winding direction after reaching the center tap.
    Type: Application
    Filed: February 12, 2004
    Publication date: October 7, 2004
    Applicant: Diamond Electric Mfg. Co., Ltd.
    Inventors: Kazuhiro Nakamura, Timothy Sieczka, Timothy Goodrich
  • Patent number: 6799451
    Abstract: An ignition coil, spark plug, and pressure sensor for an internal combustion engine are, in a preferred embodiment, integrated into a single assembly and mounted directly on a plug hole of an internal combustion engine. A hard spark plug shell serves as a pressure member and on which a strain gage is affixed. Changes in the pressure in the combustion chamber deform the shell, causing a corresponding change in the resistance of the strain gage. A bridge circuit or the like is used to measure the resistance change thereby providing a direct indication of cylinder pressure.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: October 5, 2004
    Assignee: Delphi Technologies, Inc.
    Inventors: Ronald J. Kiess, Robert A. Noel, James Tordt Wright, James Alva Boyer, Matthew W. Bell
  • Patent number: 6794974
    Abstract: A pencil ignition coil assembly module (40) that has a frusto-conically tapered core (46) and encapsulation (280) surrounding the side of the core. Features (216, 230, 234) center the core to a bobbin 48. A retainer (240, 240A) captures the core within the bobbin.
    Type: Grant
    Filed: September 18, 2003
    Date of Patent: September 21, 2004
    Assignee: Visteon Global Technologies, Inc.
    Inventors: Alex William Widiger, David Charles Stine, Todd Christopher Sexton, William Douglas Walker
  • Publication number: 20040173194
    Abstract: An object of the present invention is to provide an ignition coil which has a structure to make it possible to connect the ignition coil to a spark plug directly and in which an installation space need not be changed largely when the ignition coil is mounted in a cylinder head, and an internal combustion engine ignition system having the ignition coil.
    Type: Application
    Filed: January 13, 2004
    Publication date: September 9, 2004
    Inventors: Tomohiro Fuma, Hiroshi Inagaki, Takahiro Suzuki
  • Publication number: 20040163632
    Abstract: An ignition coil cassette having bushings retained by an irregularity of the bushings being encased by epoxy. As a result, the process by which the bushings are installed into the ignition coil cassette avoids the cost associated with the overmolding installation process, and further avoids the potential for damage associated with the ultrasonic insertion process. The irregularity is located generally adjacent one end of each of the bushings and may be, for example, in the form of an undercut or a protrusion.
    Type: Application
    Filed: February 21, 2003
    Publication date: August 26, 2004
    Inventors: Albert Anthony Skinner, Kenneth P. Senseman, Colin Hamer, Raymond O. Butler