Having An Ignition Coil With Multiple Primary Or Secondary Windings Patents (Class 123/621)
  • Patent number: 10612510
    Abstract: In an ignition apparatus, a controller outputs a discharge start signal instructing a start of a discharge in the spark plug, and a discharge control signal instructing control of a discharge current in the spark plug after the start of the discharge. A signal line connects between the controller and a control circuit. The discharge start signal and the discharge control signal are transferred from the controller to the control circuit via the signal line. The controller modulates, based on the plural command values, the discharge control signal such that the modulated discharge control signal includes information representing the plural command values and change timings for the respective command values. The control circuit controls, based on the discharge start signal and the modified discharge control signal, the energization circuit to thereby adjust the discharge current to each of the command values at a corresponding one of the change timings.
    Type: Grant
    Filed: October 22, 2018
    Date of Patent: April 7, 2020
    Assignee: DENSO CORPORATION
    Inventors: Keiko Miyake, Shunichi Takeda, Kanechiyo Terada, Tetsuya Miwa
  • Patent number: 10236117
    Abstract: An ignition coil includes primary and secondary coils, a center core inserted into a center hole of the primary coil and a center hole of the secondary coil, an annular side core that forms a magnetic circuit through which a first magnetic flux A generated by the primary coil by being joined to the center core permeates, and a permanent magnet that is disposed between the center core and the side core and that emits a second magnetic flux B directed opposite to the first magnetic flux A to apply a magnetic bias. The side core includes protruded portions that protrude towards lateral sides of a T-shaped horizontal portion of the center core, and gaps are provided between the lateral sides of the T-shaped horizontal portion of the center core and the protruded portions of the side core.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: March 19, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS HANSHIN, LTD.
    Inventor: Masaaki Hori
  • Patent number: 10199162
    Abstract: An ignition coil includes primary and secondary coils, a center core inserted into a center hole of the primary coil and a center hole of the secondary coil, an annular side core that forms a magnetic circuit through which a first magnetic flux A generated by the primary coil by being joined to the center core permeates, and a permanent magnet that is disposed between the center core and the side core and that emits a second magnetic flux B directed opposite to the first magnetic flux A to apply a magnetic bias. The side core includes protruded portions that protrude towards lateral sides of a T-shaped horizontal portion of the center core, and gaps are provided between the lateral sides of the T-shaped horizontal portion of the center core and the protruded portions of the side core.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: February 5, 2019
    Assignee: HITACHI AUTOMOTIVE SYSTEMS HANSHIN, LTD.
    Inventor: Masaaki Hori
  • Patent number: 10041463
    Abstract: According to an ignition device, a first switching unit applies a voltage between electrodes of by spark plug by turning on/off energization from an on-vehicle battery to a primary coil. Further, a second switching unit applies a voltage having the same direction as a spark discharge generated by turning on/off the first switching unit between the electrodes of the spark plug by supplying electrical energy accumulated in a booster circuit into a primary coil. Accordingly, it is possible to greatly reduce a complexity of the on/off switching of the first and second switching units compared to a conventional technology.
    Type: Grant
    Filed: April 9, 2015
    Date of Patent: August 7, 2018
    Assignee: DENSO CORPORATION
    Inventors: Makoto Toriyama, Shunichi Takeda, Kanechiyo Terada, Satoru Nakayama, Takashi Oono
  • Patent number: 9461444
    Abstract: This disclosure provides an ignition coil for a spark ignited internal combustion engine. The ignition coil includes a coil body having an outer surface and internal windings coupled to a connector. The ignition coil also includes a housing surrounding the coil body. The housing has an outer wall spaced apart from the outer surface of the coil body thereby forming a gap between the outer surface of the coil body and the outer wall. The outer wall includes an opening in flow communication with the gap.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: October 4, 2016
    Assignee: CUMMINS INC.
    Inventor: Alan C. Anderson
  • Patent number: 9399979
    Abstract: An ignition system for an internal combustion engine includes an ignition transformer with two primary windings. The ignition system is designed to generate, for a given ignition event, a unipolar current through the secondary winding by way of a control circuit that is configured to first energize and deenergize the first primary winding to establish a first electrical arc across the spark-plug electrodes and, when the current in the secondary winding reaches, or drops below, a current threshold, repeatedly energizes and deenergizes the second primary winding to establish a plurality of second current pulses across the electrodes in order to maintain the burn phase.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: July 26, 2016
    Assignee: Delphi Automotive Systems Luxembourg SA
    Inventors: Volker Heise, Marco Loenarz, Frank Lorenz
  • Patent number: 8851040
    Abstract: The present invention features an ignition coil of an engine, in which a small condenser is directly installed to an LV pin of the ignition coil, thus effectively removing noise, and dissipating heat from the ignition coil to an outside, in addition to preventing the inflow of water.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: October 7, 2014
    Assignees: Hyundai Motor Company, YuraTech Co., Ltd.
    Inventors: Ji Hyoung Kim, Jong Wook Lee, Kyung Sick Cho, Ki Su Lim
  • Patent number: 8813732
    Abstract: According to one embodiment, an internal combustion engine ignition system, including: a plurality of spark coils each having a primary coil and a secondary coil, each secondary coil being coupled to a common spark plug to apply a high voltage thereto; a plurality of primary current generation module provided correspondingly with the spark coils and configured to asynchronously generate primary currents respectively flowing through the primary coils; one or a plurality of primary current detection module configured to detect each of the primary currents; and a primary current control module configured to adjust an output power supplied to each primary coil in accordance with a change in the primary current to thereby control an increase rate of the primary current.
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: August 26, 2014
    Assignee: Diamond Electric Mfg. Co., Ltd.
    Inventors: Naoki Kataoka, Yoshiyuki Fukumura
  • Patent number: 8776769
    Abstract: The plasma ignition device includes an ignition plug, a breakdown discharge circuit configured to apply a high voltage to the ignition plug to cause a breakdown discharge in a discharge space in the ignition plug, and a plasma discharge circuit configured to accumulate electric energy supplied from a power supply and applies the accumulated electric energy to the ignition plug as a current to bring a gas in the discharge space into a plasma state so that the gas in the plasma state is injected to a combustion chamber of an combustion engine during the breakdown discharge in order to cause ignition. The plasma discharge circuit includes an energy accumulating section, and an energy supplying section configured to supply the electric energy to the energy accumulating section during a short time period immediately before the breakdown discharge circuit applies the first voltage to the ignition plug.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: July 15, 2014
    Assignee: Denso Corporation
    Inventor: Yuji Kajita
  • Publication number: 20140076295
    Abstract: An ignition system for an internal combustion engine includes an igniter having at least two high voltage (HV) electrodes and a low voltage (LV) electrode. The at least two HV electrodes are electrically isolated one from the other and the at least two HV electrodes are electrically isolated from the LV electrode. The system includes a coil assembly having at least one primary winding and at least two secondary windings, each secondary winding having a terminal for providing a HV signal. A driver module is provided for energizing the coil assembly. A high-tension cable, comprising at least two resistive wires, connects the at least two HV electrodes to the terminals of respective ones of the at least two secondary windings. The high-tension cable further comprises a non-resistive wire connecting the LV electrode to the driver module.
    Type: Application
    Filed: June 13, 2013
    Publication date: March 20, 2014
    Inventors: Ming ZHENG, Shui YU, Kelvin XIE
  • Publication number: 20130167817
    Abstract: A system for inductive contactless power transfer between a first vehicle part and at least one collector that can be variably positioned relative to the first vehicle part in a passenger cabin of a vehicle includes primary windings (P1-PN) that with secondary windings (S1, S2) on collectors or second vehicle parts can form a transducer. Depending on operating-mode switching of the vehicle, the operation of collectors is prevented, which collectors for the purpose of providing electrical power for operating external cleaning or maintenance devices are brought into the vehicle. Because of the expansion of the function of an existing contactless power and data transfer system, the system is particularly cost-effective and flexible, and in addition is of a very lightweight design.
    Type: Application
    Filed: February 27, 2013
    Publication date: July 4, 2013
    Applicant: AIRBUS OPERATIONS GMBH
    Inventor: AIRBUS OPERATIONS GMBH
  • Publication number: 20130104845
    Abstract: An ignition system for an internal combustion engine that utilizes a single primary coil and a single secondary coil to drive a pair of spark plugs. Current flowing in both a first direction and a second direction passes through the primary coil. The current flowing through the primary coil induces corresponding current in the secondary coil, which flows from the secondary coil to one of two spark plugs. Each spark plug is coupled to the secondary coil such that each of the two spark plugs receives current flowing only in a single direction. The current flowing through the ignition system can be from either a power source or created by the rotation of a flywheel having a series of magnet clusters.
    Type: Application
    Filed: October 28, 2011
    Publication date: May 2, 2013
    Applicant: BRIGGS & STRATTON CORPORATION
    Inventors: Robert J. Koenen, Andrew Paskov
  • Publication number: 20130104863
    Abstract: An ignition coil assembly and a method of assembling the ignition coil assembly including a first spool, a first coil, and a second spool. The first coil is wound around a first spool outer surface. The first spool and the first coil are disposed within a cavity of the second spool and an electrically insulating material injected into an annular space defined between a first coil outer surface and a second spool inner surface. The first spool is configured to allow a decrease of a circumference of the first spool when the first coil is wound around an outer surface of the first spool. Decreasing the circumference of the first spool increases the annular space sufficient to inject the electrically insulating material into the annular space without creating substantial voids in the electrically insulating material.
    Type: Application
    Filed: October 26, 2011
    Publication date: May 2, 2013
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: Luis Arturo ARROYO, Jose J. GALICIA
  • Publication number: 20120017881
    Abstract: According to one embodiment, an internal combustion engine ignition system, including: a plurality of spark coils each having a primary coil and a secondary coil, each secondary coil being coupled to a common spark plug to apply a high voltage thereto; a plurality of primary current generation module provided correspondingly with the spark coils and configured to asynchronously generate primary currents respectively flowing through the primary coils; one or a plurality of primary current detection module configured to detect each of the primary currents; and a primary current control module configured to adjust an output power supplied to each primary coil in accordance with a change in the primary current to thereby control an increase rate of the primary current.
    Type: Application
    Filed: May 31, 2011
    Publication date: January 26, 2012
    Applicant: DIAMOND ELECTRIC MFG CO., LTD
    Inventors: Naoki KATAOKA, Yoshiyuki Fukumura
  • Publication number: 20100132677
    Abstract: An ignition apparatus includes a cylindrical core made from magnetically-permeable material and a C-shaped magnetic return path structure that is made from a stack of silicon steel laminations. A tightly controlled air gap is provided between one leg of the C-shaped structure and an end face of the core, forming a magnetic circuit having a high magnetic permeability, which overall reduces the number of primary winding turns needed, thereby reducing the amount of copper wire. In addition, the circular cross-section of the core reduces the mean length per turn (MLT) of the primary winding because the primary winding can be wound directly on the core, which in turn also reduces the MLT of the secondary winding. The reduced MLT also reduces the amount of copper wire. The structure may be replaced using a magnetically-permeable, U-shaped shield.
    Type: Application
    Filed: December 1, 2008
    Publication date: June 3, 2010
    Inventors: Albert A. Skinner, Edgard Wolf, Colin J. Hamer, Andre V. Scaff
  • Patent number: 7681562
    Abstract: A first current is supplied to a first primary winding of an ignition coil and a second current is supplied to a second primary winding of the ignition coil. A voltage is generated across a secondary winding of the ignition coil and an ignition spark current is generated at a spark plug coupled to the secondary winding. The ignition spark current is based upon the generated voltage and the sum of the first current and the second current.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: March 23, 2010
    Assignee: Autotronic Controls Corporation
    Inventor: Herbert Boerjes
  • Publication number: 20090071454
    Abstract: An ignition coil includes a generally cylindrical center core having a plurality of cylindrical portions whose outside diameter is different from each other, a primary coil disposed around the center core; and a secondary coil disposed around the primary coil, wherein the secondary coil boosts voltage that is applied to the primary coil to high voltage.
    Type: Application
    Filed: September 10, 2008
    Publication date: March 19, 2009
    Applicant: DENSO CORPORATION
    Inventor: Norihito Fujiyama
  • Patent number: 7131183
    Abstract: An ignition coil and a method for its manufacturer are provided, the ignition coil including a housing, a primary winding and a secondary winding disposed in the housing, and a terminal including a connection portion in electrical communication with the secondary winding and a threaded portion engaging the housing. The threaded portion of the terminal may include a self-tapping threaded portion. Furthermore, the terminal may include a first body portion having a first threaded portion and a first median diameter and a second body portion having a second threaded portion and a second median diameter, where the second median diameter is greater than the first median diameter. The terminal may also include a shoulder portion having a diameter greater than the second median diameter and a third body portion having a third median diameter greater than the second median diameter.
    Type: Grant
    Filed: April 26, 2004
    Date of Patent: November 7, 2006
    Assignee: Ford Motor Company
    Inventors: Rick S. Burchett, William D. Walker
  • Patent number: 6860256
    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: Grant
    Filed: February 12, 2004
    Date of Patent: March 1, 2005
    Assignee: Diamond Electric Mfg. Co., Ltd.
    Inventors: Kazuhiro Nakamura, Timothy Sieczka, Timothy Goodrich
  • 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: 6328025
    Abstract: An ignition coil having a core with a first leg and a second leg, a first primary winding arranged over the first leg, a second primary winding arranged over the second leg, a first secondary winding arranged over the first primary winding, a second secondary winding arranged over the second primary winding, and a spark plug terminal electrically connected to one end of the second secondary winding. The first primary winding is connected in series to the second primary winding. The first secondary winding is connected in series to the second secondary winding. The core is of a laminated steel construction. The first and second secondary windings are progressively wound in multiple layers over respective bobbins.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: December 11, 2001
    Inventor: Thomas C. Marrs
  • Patent number: 5870012
    Abstract: An engine ignition coil device which comprises a coil case composed of a first cylindrical case and a second case having a small tubular hole in its center portion and an upper external shoulder at its open end fitted in an open end of the first case to form a closed end of the coil case and an internal unit assembled from a primary side coil bobbin, a secondary-side coil bobbin having a high-voltage terminal holder projecting from a center of its end flange portion, a rod-shaped core, and a high-voltage terminal attached to the high-voltage terminal holder and having a contact for electrically connecting an ignition plug thereto. The internal assembly is mounted in the coil case by inserting the high-voltage terminal holder in the small tubular hole of the secondary case with a tip of the contact projected outwardly therefrom and formed integrally with the coil case by injecting melted insulating resin into the coil case.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: February 9, 1999
    Assignee: Toyo Denso Kabushiki Kaisha
    Inventors: Makoto Sakamaki, Toshiyuki Shinozawa
  • Patent number: 5806505
    Abstract: An ignition coil arrangement for a multicylinder internal combustion engine comprising at least one coil unit, which is able to be simply installed even under restricted spatial conditions. To this end, the coil unit, which contains a primary winding and a secondary winding attached to two spark plugs, is designed with the windings as a divided and mechanically separated coil unit. One primary partial winding and an associated secondary partial winding are each combined to form partial winding, which are electrically connected in series via a primary connector lead or a secondary connector lead (26), and are jointly driven by way of a contact element. The ignition coil arrangement is used, in particular, in motor vehicles.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: September 15, 1998
    Assignee: Robert Bosch GmbH
    Inventor: Wolfgang Herbert
  • Patent number: 5721524
    Abstract: A improved stator apparatus for use in the ignition system of an internal combustion engine. The stator apparatus comprises a magnetically permeable core having a coil housing mounted to a leg portion thereof. A coil assembly including a voltage transformer is maintained in the coil housing. The various coils of the coil assembly are mounted about a central chimney member of the housing coaxial with the portion of the core extending therethrough. A circuit grounding member is electrically connected between the voltage transformer and the core by frictional contact therebetween. The circuit grounding member is constructed of a generally flat conductive piece having a longitudinal ridge defined along a portion of its length. In exemplary constructions, the longitudinal ridge extends along side a portion of the core and is biased into frictional contact therewith. The ridge facilitates assembly of the stator apparatus as well as enhancing electrical connection of the grounding member with the core.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 24, 1998
    Assignee: Power Parts, Inc.
    Inventors: Rodney G. Delves, Steven L. Johnson
  • Patent number: 5493496
    Abstract: An apparatus for identifying the power stroke of a particular cylinder in a multi-cylinder engine which utilizes a wasted spark electronic distributorless ignition system but lacks a camshaft driven cylinder identification sensor, wherein a single sensor can be placed in a coil pack adjacent to and substantially equidistant from the ignition coil towers. The sensor will produce a signal reflecting the difference in voltage drops between corresponding pairs of spark plugs who share the same coil and which utilizes this signal to determine the power stroke of individual cylinders to produce a resulting synthetic cylinder identification signal. This apparatus can further be used as a permanent on-board sensor, thereby negating the need for a separate camshaft driven sensor, to determine the cylinder identification.
    Type: Grant
    Filed: December 15, 1992
    Date of Patent: February 20, 1996
    Assignee: Ford Motor Company
    Inventors: John V. James, James M. Dosdall
  • Patent number: 5156136
    Abstract: An ignition coil is provided with a primary coil which includes a distributed constant circuit including inductance and capacitance. A thyristor is connected in parallel to the primary coil, and a secondary coil is magnetically coupled to the primary coil. When a predetermined voltage is supplied to the primary coil, the capacitance is charged. If the thyristor is turned-on, the capacitance is discharged sequentially with time deviation since charge of the capacitance is sequentially delayed by the inductance which is connected in parallel to the capacitance.
    Type: Grant
    Filed: June 18, 1991
    Date of Patent: October 20, 1992
    Assignee: Murata Manufacturing Co., Ltd.
    Inventor: Mitsunao Okumura
  • Patent number: 4998526
    Abstract: An ignition system for a spark ignited internal combustion engine. The system can apply alternating current to the electrodes of a spark plug to maintain an arc at the electrodes for the desired length of time. The amplitude of the arc current can be varied. The alternating current is developed by a DC to AC inverter that is comprised of a transformer that has a center tapped primary and a secondary that is connected to the spark plug. An arc is initiated at the spark plug by discharging a capacitor through one of the winding portions of the center-tapped primary. Alternatively, the energy stored in an inductor can be supplied to a primary winding portion to initiate an arc. The ignition system is powered by a controlled current source that receives input power from a source of direct voltage such as a battery on a motor vehicle.
    Type: Grant
    Filed: June 5, 1990
    Date of Patent: March 12, 1991
    Assignee: General Motors Corporation
    Inventor: Kalyan P. Gokhale
  • Patent number: 4947821
    Abstract: An ignition system of AC continuous discharge type is disclosed which comprises a switching circuit for supplying the primary current of an ignition coil alternately in two directions and which is applicable to the internal combustion engine, for example. The rise of the primary current is slowed by an inductance device and the energy stored in the inductance device is absorbed into a capacitor.
    Type: Grant
    Filed: February 15, 1989
    Date of Patent: August 14, 1990
    Assignee: Nippondenso Co., Ltd.
    Inventor: Masato Somiya
  • Patent number: 4770152
    Abstract: An ignition device for an internal combustion engine comprising an ignition coil adapted to produce a secondary reversible voltage, two wires commonly branched from the one end of the ignition coil, and two spark plugs connected to the wires. In each of the two wires, there are provided a series gap forming device and a diode. The diodes are arranged in reverse directions relative to each other, so that the secondary high voltage generated in one direction can pass through one of the diodes and the secondary high voltage in the reverse direction can pass through the other diode, whereby a spark is realized at one end of the two spark plugs by a selective application of the primary current.
    Type: Grant
    Filed: October 29, 1987
    Date of Patent: September 13, 1988
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kazuhisa Mogi, Eishi Ohno
  • Patent number: 4750467
    Abstract: An ignition system for a distributorless internal combustion engine ignition system. Parameters related to the energization of a given ignition coil are stored and later utilized to control the dwell time for this same ignition coil. Another coil is energized and deenergized between the storing of parameters and the subsequent use of the parameters that relate to the given coil. The system causes a spark plug to be fired when a calculated spark timing signal is developed or at a time delayed from the occurrence of the calculated spark timing signal. Delayed spark plug firing occurs when certain conditions are not met prior to the time the calculated spark timing signal occurs. One of these conditions is that primary winding current has not attained a current limit value prior to the time that the calculated spark timing signal occurs.
    Type: Grant
    Filed: December 10, 1986
    Date of Patent: June 14, 1988
    Assignee: General Motors Corporation
    Inventor: Michael A. Neuhalfen
  • Patent number: 4702221
    Abstract: In an ignition device for an internal combustion engine, the ignition device comprises: three closed circuits including first, second and third closed circuits, each circuit having at least a DC power source, a primary coil and a switching transistor; an ignition coil having three primary coils and a secondary coil; an ignition command signal generating means producing first and second ignition command signals, the first ignition command signal being applied to the third closed circuit and the second ignition command signal being applied to the control circuit; and a control circuit for causing the first and second switching elements to push-pull operate based on the input timing of the second ignition command signal.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: October 27, 1987
    Assignees: Nippon Soken, Inc., Nippondenso Co., Ltd.
    Inventors: Norihito Tokura, Hisasi Kawai, Masahiro Goto, Seiji Morino, Masato Soumiya
  • Patent number: 4641626
    Abstract: A current-interrupting type ignition device having an ignition coil having a primary winding, a secondary winding and an auxiliary winding disposed in the primary circuit, the number of turns of the auxiliary winding being less than that of the primary one. The auxiliary winding is energized in such a manner that electromagnetic flux passes in a direction opposite to that of the primary winding when energized. In this arrangement current flows through the auxiliary winding via a transistor and a diode when the primary current flowing through the primary winding is interrupted, thereby adding a voltage induced across the secondary winding by the transferring effect upon the energization of the auxiliary winding to the corresponding high voltage induced across the secondary winding upon the interruption of the current flow through the primary winding.
    Type: Grant
    Filed: November 25, 1985
    Date of Patent: February 10, 1987
    Assignee: Nippondenso Co., Ltd.
    Inventors: Seiji Morino, Eiichi Uno, Yoshihiro Yoshitani
  • Patent number: 4627407
    Abstract: To reliably provide ignition energy only to specific spark plugs (11, 12; 14, 15) of a multi-cylinder internal combustion engine (ICE), a double-E core has primary windings (6, 8) located on a main or central branch, and separate secondary windings (10, 13) located in shunt branches, each secondary winding being associated with respective spark plugs. The primary windings are so energized that, at any one time, only one of the primary windings is conductive. In accordance with the invention, permanent-magnet biasing magnets (18, 20) are located in air gaps in the shunt magnetic paths (17, 19), and so polarized that the flux generated upon current flow through the respective branches of the primary windings is counter the bias magnetization of the respective magnet (18, 20) in the respective shunt path (17, 19) on which the secondary winding (10, 13) is wound which is associated with the respectively energized primary winding (e.g.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: December 9, 1986
    Assignee: Robert Bosch GmbH
    Inventor: Dieter Betz
  • Patent number: 4599985
    Abstract: To reliably provide ignition energy only to specific spark plugs (11, 12; 14, 15) of a multi-cylinder internal combustion engine (ICE), a double-E core has a main or common or central branch, and separate primary (6, 8) and secondary windings (10, 13) located in shunt core branches (18', 19'), each secondary winding being associated with respective spark plugs. The magnetic circuits of the primary windings including the common branch and single air gaps (20, 21), each in the shunt magnetic paths (18, 19), so that the flux change generated upon interruption of current flow through the respective primary windings need pass through one air gap only for the associated concentric secondary, buth through two magnetically serially placed air gaps for the other secondary.
    Type: Grant
    Filed: December 26, 1984
    Date of Patent: July 15, 1986
    Assignee: Robert Bosch GmbH
    Inventor: Dieter Betz
  • Patent number: 4562823
    Abstract: An ignition device for an internal combustion engine has a DC power source, first and second switching elements, a control signal generator for the switching elements, an ignition coil, and spark gaps. A first part of a primary coil of the ignition coil, a capacitor, the DC power source, and the first switching element form a closed circuit. A second part of the primary coil and the second switching element form another closed circuit. The signal generator generates ON signals for alternately turning on the first and second switching signals at predetermined timings based on an ignition command signal. The ignition performance of this ignition device for an internal combustion engine is improved.
    Type: Grant
    Filed: July 13, 1984
    Date of Patent: January 7, 1986
    Assignee: Nippon Soken, Inc.
    Inventors: Mitiyasu Moritugu, Hisasi Kawai, Norihito Tokura
  • Patent number: 4509495
    Abstract: To provide ignition energy to respective spark plugs of a multi-cylinder internal combustion engine (ICE) without a distributor, winding groups, each including a primary and secondary winding, are located on respective core portions of an iron core, which core portions are coupled together by zones (a, b, c) of high magnetic reluctance, or low magnetic flux conductivity; the winding groups can be located on L cores (16, 17) with two high-reluctance gaps between the ends of the facing L cores (FIG. 1) or on a common U core (28, 30, 29) with a cross yoke (31) spaced from the ends of the legs of the U.
    Type: Grant
    Filed: February 6, 1984
    Date of Patent: April 9, 1985
    Assignee: Robert Bosch GmbH
    Inventors: Dieter Betz, Jorg Issler
  • Patent number: 4478201
    Abstract: A distributorless ignition system of an internal combustion engine has a supplementary spark energy module to increase spark energy. Two ignition coils each have secondary coils with split secondary center taps. Each of the primary windings is coupled to its own ignition module. The supplementary spark energy module is coupled to each of the split secondary center taps. A pair of spark plugs is coupled to one of the secondary windings and another pair of spark plugs is coupled to the other secondary winding.
    Type: Grant
    Filed: February 23, 1984
    Date of Patent: October 23, 1984
    Assignee: Ford Motor Company
    Inventor: Joseph R. Asik
  • Patent number: 4462380
    Abstract: A distributorless ignition system of an internal combustion engine has a supplementary spark energy module to increase spark energy. Two ignition coils each have secondary coils with split secondary center taps. Each of the primary windings is coupled to its own ignition module. The supplementary spark energy module is coupled to each of the split secondary center taps. A pair of spark plugs is coupled to one of the secondary windings and another pair of spark plugs is coupled to the other secondary winding.
    Type: Grant
    Filed: December 20, 1982
    Date of Patent: July 31, 1984
    Assignee: Ford Motor Company
    Inventor: Joseph R. Asik
  • Patent number: 4448182
    Abstract: An ignition coil includes a primary winding, an auxiliary primary winding and an ignition high voltage generating secondary winding which are wound on the same core. The primary current from the generating coil of a magneto flows to the base of a transistor through the primary winding of the ignition coil. The primary current flowing through the primary winding induces a voltage across the auxiliary primary winding and the induced voltage is applied between the base and emitter of the transistor. At the time of ignition, the primary current flowing to the base of the transistor is shunted by a semiconductor switching element so that the transistor is turned off and the current flowing through the auxiliary primary winding is interrupted, thus generating a high voltage across the secondary winding of the ignition coil.
    Type: Grant
    Filed: September 10, 1980
    Date of Patent: May 15, 1984
    Assignee: Nippondenso Co., Ltd.
    Inventors: Jun Aoyama, Noboru Nakayama
  • Patent number: 4446842
    Abstract: An ignition system for an internal combustion engine, wherein separate ignition transformers are mounted directly on respective spark plugs and an A.C. drive signal is applied to the ignition transformers sequentially in accordance with engine timing to fire the spark plugs sequentially. The A.C. drive signal is applied to each of the ignition transformers by means of a leakage transformer whereby ignition currents are maintained at a relatively low level after initiation of the ignition discharge across the spark plug electrodes. In one embodiment, each ignition transformer is composed of plural individual transformers disposed in a planetary arrangement around an axis defined by the respective spark plug. Each of these individual transformers includes at least one secondary winding and at least one primary winding wound on a respective core, with each of the secondary windings mounted in series across the electrodes of the spark plug.
    Type: Grant
    Filed: June 1, 1982
    Date of Patent: May 8, 1984
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Shinichiro Iwasaki
  • Patent number: 4432323
    Abstract: An ignition system for an internal combustion engine is disclosed which includes a separate ignition transformer for each spark plug in the engine. Each of the ignition transformers is enabled by means of signals produced by a crankshaft position sensor. Pulsating DC currents are then caused to flow in the primary windings of the ignition transformer thereby inducing a high voltage into a secondary winding of the transformer. A combination ignition transformer and spark plug cover is also disclosed.
    Type: Grant
    Filed: January 4, 1983
    Date of Patent: February 21, 1984
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Shinichiro Iwasaki
  • Patent number: 4407259
    Abstract: A plasma ignition system having a plurality of plasma ignition plugs eliminates a mechanical distributor for sequentially distributing plasma ignition energy into each plasma ignition plug.
    Type: Grant
    Filed: December 23, 1981
    Date of Patent: October 4, 1983
    Assignee: Nissan Motor Company, Limited
    Inventor: Toshimi Abo
  • Patent number: 4382430
    Abstract: An ignition system for an internal combustion engine is disclosed which includes a separate ignition transformer for each spark plug in the engine. Each of the ignition transformers is enabled by means of signals produced by a crankshaft position sensor. Pulsating DC currents are then caused to flow in the primary windings of the ignition transformer thereby inducing a high voltage into a secondary winding of the transformer. A combination ignition transformer and spark plug cover is also disclosed.
    Type: Grant
    Filed: June 1, 1981
    Date of Patent: May 10, 1983
    Inventor: Shinichiro Iwasaki
  • Patent number: 4378779
    Abstract: An ignition system for an internal combustion engine includes two power transistors respectively connected to opposite ends of the primary winding of an ignition coil to interrupt the primary currents which flow from a power source through the mid-tap of the primary winding. The two power transistors have emitters connected in common and a resistor is connected to the junction of this common connection to detect respective primary currents with the single resistor. A single current control circuit is provided to control the two power transistors in response to the detected respective primary currents.
    Type: Grant
    Filed: July 28, 1980
    Date of Patent: April 5, 1983
    Assignees: Nippondenso Co., Ltd., Toshiba Corporation
    Inventors: Takasi Hachiga, Yasuo Taguchi
  • Patent number: 4365186
    Abstract: An ignition system (51-59, 60, Ql, Qn, 30) providing high modulation energy by means of modulator (30) is used to fire an igniter and effect total fuel burning without detonation. An extremely long ignition arc is initiated at an optimum timing angle (.theta..degree.) in advance of top dead center piston position. Such long arc with its high energy content makes possible an ignited fuel nodule of increased size within the combustion chamber of the engine. The increased fuel nodule size makes possible efficient engine operation at the variety of cylinder pressures and the variety of ignition voltages usable to ignite the fuel. These long arcs may be sustained over a large range of duty cycle periods of ignition electrical power by modulation of transient current feeding the igniter.
    Type: Grant
    Filed: December 3, 1980
    Date of Patent: December 21, 1982
    Inventor: Martin E. Gerry
  • Patent number: 4349008
    Abstract: Apparatus for producing spark ignition of an internal combustion engine in which sparks at the spark plugs are initiated by a high voltage pulse of typically 20 KV and are sustained thereafter by a d.c. voltage of typically 3 KV. In one embodiment the d.c. voltage is produced from a 12 volt supply by a d.c. to d.c. converter, the converter being adapted to produce a substantially constant voltage irrespective of the current drain produced by the spark, within given limits. The converter is also adapted to shut down its operation in the event of an output short circuit. The converter is disclosed connected to a lean burn PROCO engine with the result that only one spark plug per cylinder is required. In an alternative embodiment the d.c. sustaining voltage is derived directly from a conventional alternator driven by the engine.
    Type: Grant
    Filed: November 9, 1979
    Date of Patent: September 14, 1982
    Inventor: Basil E. Wainwright
  • Patent number: 4245609
    Abstract: An ignition system includes an alternating current power source which feeds a transformer having a primary winding, the primary winding being coupled to an electronic switch. The electronic switch intermittently interrupts current flowing in the primary winding and in the output circuit of the power source. Such electronic switch is made operable by virtue of the peak excursions of the alternating current thus supplying the necessary collector or emitter potential, depending upon the manner in which the electronic switch is connected, for the entire igniter firing cycle. A capacitor in series with the output circuit of the power source and with the primary winding enables current to be transferred out of the power source to such primary winding. Such electronic switch also provides discrete separation between successive output waveforms of successive ignition firing cycles. The system employs a temporary change accumulator inductor in the output circuit in series with the primary winding.
    Type: Grant
    Filed: December 18, 1978
    Date of Patent: January 20, 1981
    Inventor: Martin E. Gerry