Using Capacitive Storage And Discharge For Spark Energy Patents (Class 123/596)
  • Patent number: 10508638
    Abstract: An ignition device includes an ignition coil, an ignition plug and ignition control unit. The ignition control unit includes a secondary current adjusting unit that adjusts, in each cycle, an amount of the secondary current after initiating the discharge, a discharge extension detecting unit that detects an amount of extension of the discharge, and a short determination unit that determines whether a discharge-short has occurred. The ignition control unit controls the secondary current control unit such that a first step and a second step are repeatedly executed. The first step decreases the secondary current while keeping the secondary current higher than a predetermined lower current limit, when the extension amount detected by the discharge extension detecting unit is a predetermined extension amount or more. The second step increases the secondary current when the short determination unit determines that a discharge-short has occurred.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: December 17, 2019
    Assignee: DENSO CORPORATION
    Inventors: Noriaki Nishio, Kanechiyo Terada
  • Patent number: 10097010
    Abstract: In one example, a circuit includes a voltage source, an inductive load, a capacitor, a switching unit, and a load unit. The switching unit is configured to operate in a first state and a second state. The switching unit couples the inductive load to the voltage source during the first state. The switching unit couples the inductive load to the capacitor during the second state. The load unit is configured to receive energy from the capacitor based on a comparison of a voltage of the capacitor and a reference voltage.
    Type: Grant
    Filed: April 19, 2016
    Date of Patent: October 9, 2018
    Assignee: Infineon Technologies AG
    Inventors: Jens Barrenscheen, Christian Schweikert
  • Patent number: 9995267
    Abstract: An ignition apparatus includes an adjuster. The adjuster adjusts, according to at least one of a primary voltage and a secondary voltage detected by a voltage detector, at least one of an application timing and an application level of auxiliary electrical energy to an ignition coil while main electrical energy is applied to a spark plug by the ignition coil. The application timing includes whether the auxiliary electrical energy is applied to the ignition coil.
    Type: Grant
    Filed: April 11, 2014
    Date of Patent: June 12, 2018
    Assignee: DENSO CORPORATION
    Inventors: Yuuki Kondou, Masahiro Ishitani, Satoru Nakayama, Akimitsu Sugiura, Makoto Toriyama, Takashi Oono
  • Patent number: 9957944
    Abstract: An ignition apparatus includes a blow-off determining unit 5b. The blow-off determining unit 5b determines, when the value ?I2 of the time derivative of a secondary electric current exceeds a predetermined threshold value Z during a determination period, that blow-off has occurred; the determination period is a predetermined time period ?T from the start of a spark discharge by a main ignition circuit 3. Further, when it is determined that blow-off has occurred during a main ignition (full-transistor ignition), it is controlled to perform a continuing spark discharge after the main ignition in a next cycle. Moreover, a secondary electric current command value in performing the continuing spark discharge is set to an electric current value that is obtained by adding a predetermined electric current value ? to the secondary electric current value I2x immediately before the occurrence of blow-off. Consequently, in the next cycle, it is possible to reliably prevent blow-off, thereby reliably preventing misfire.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: May 1, 2018
    Assignee: DENSO CORPORATION
    Inventor: Satoru Nakayama
  • Patent number: 9932955
    Abstract: An ignition apparatus inputs energy during a predetermined energy input period after the interruption of a primary electric current by an ignition switch and a discharge of an ignition plug caused by a secondary electric current. Moreover, the ignition apparatus includes a blow-off detection unit that detects, during the energy input period IGW after the start of the discharge by the ignition plug, occurrence of blow-off of the discharge. When the secondary electric current I2 drops below a blow-off detection electric current threshold value Ibo at a time instant tbo in a “second region” where it is impossible to perform a re-discharge after blow-off, the blow-off detection unit determines that blow-off has occurred and the ignition apparatus stops the energy input from an energy input unit to an ignition coil. By preventing unnecessary energy input, it is possible to suppress unnecessary electric power consumption and wear of electrodes of the ignition plug.
    Type: Grant
    Filed: April 7, 2015
    Date of Patent: April 3, 2018
    Assignee: DENSO CORPORATION
    Inventors: Naoto Hayashi, Makoto Toriyama, Kaori Doi, Kenechiyo Terada, Kenta Kyouda, Satoru Nakayama
  • Patent number: 9903333
    Abstract: An ignition apparatus for an internal-combustion engine includes a main ignition CDI circuit that has a main ignition boosting circuit boosting battery voltage and a main ignition capacitor storing electric charge boosted by the main ignition boosting circuit, and that releases the electric charge stored in the main ignition capacitor to a primary coil of an ignition coil to make an ignition plug generate spark discharge, and an energy input circuit that has an energy input boosting circuit boosting battery voltage and an energy input capacitor storing electric charge boosted by the energy input boosting circuit, and that releases the electric charge stored in the energy input capacitor to the primary coil, during a spark discharge started by operation of the main ignition CDI circuit, to make a secondary current flow in the same direction and to a secondary coil of the ignition coil, thereby making spark discharge continue which is started by the operation of the main ignition CDI circuit.
    Type: Grant
    Filed: April 8, 2015
    Date of Patent: February 27, 2018
    Assignee: DENSO CORPORATION
    Inventor: Kanechiyo Terada
  • Patent number: 9293909
    Abstract: A power electronics module for enhancing short circuit failure mode (SCFM) transitions. The module is adapted to disconnect a gate unit from the module using a first switch, upon a failure of at least one of a plurality of semiconductor chips during which the failed chip enters an SCFM, and connect a passive circuit arrangement, including at least one capacitor and at least one resistor, to the module using a second switch. The passive circuit arrangement is adapted to switch on at least one of the remaining non-failed semiconductor chips.
    Type: Grant
    Filed: April 20, 2012
    Date of Patent: March 22, 2016
    Assignee: ABB RESEARCH LTD
    Inventors: Franz Wildner, Thomas Christen, Thorsten Strassel
  • Patent number: 9246313
    Abstract: An ignition system includes an ignition plug, a discharge power supply for applying a high voltage to the gap of the ignition plug, a high-frequency power supply for supplying a high-frequency current to the gap, a matching unit provided between the ignition plug and the high-frequency power supply, and a mixer through which currents output from the two power supplies flow. An oscillation frequency fs (Hz) which maximizes the current flowing between the matching unit and the mixer when spark discharge is generated and an oscillation frequency fo (Hz) which maximizes the current flowing between the matching unit and the mixer when spark discharge is not generated satisfy a relation fs/fo?0.85. Thus, a current whose oscillation frequency is equal to the oscillation frequency fs flows between the matching unit and the mixer when spark discharge is not generated.
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: January 26, 2016
    Assignee: NGK SPARK PLUG CO., LTD.
    Inventors: Kenji Ban, Tatsunori Yamada, Tomokatsu Kashima, Katsutoshi Nakayama
  • Patent number: 9214803
    Abstract: Disclosed is an alternator overvoltage protection circuit having a TRIAC and a MOSFET. The TRIAC is electrically connected to the MOSFET and the TRIAC is electrically connected to a magneto. The TRIAC is configured to ground the magneto when triggered by the MOSFET. The MOSFET is electrically connected to an alternator and configured to conduct when the alternator operates in an overvoltage condition. Also disclosed is a method of alternator overvoltage protection for a piece of outdoor power equipment, the method including providing a TRIAC and an alternator rotated by an engine having a magneto, wherein the alternator outputs a voltage when rotated by the engine. The method further includes configuring the TRIAC to ground the magneto when the alternator operates in an overvoltage condition, thereby disabling the magneto, which stops the rotation of the engine and stops the alternator from outputting voltage.
    Type: Grant
    Filed: February 12, 2015
    Date of Patent: December 15, 2015
    Assignee: MTD Products Inc
    Inventor: Maynard S. Guadiz
  • Patent number: 9147999
    Abstract: An ignition apparatus has an ignition transformer that has a primary winding and a secondary winding. The transformer has a first primary winding connection for connection to a first supply voltage potential and a second primary winding connection for connection to a second supply voltage potential via a controllable switching element. Accordingly a first capacitor is connected up between the first primary winding connection and the second supply voltage potential and a second capacitor is connected up between the second primary winding connection and the second supply voltage potential.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: September 29, 2015
    Assignee: Continental Automotive GmbH
    Inventor: Stephan Bolz
  • 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
  • Patent number: 8528531
    Abstract: A current of sufficient size to form plasma at ignition of a plasma jet ignition plug flows to a spark discharge gap while suppressing noise occurrence. There is provided an ignition apparatus of a plasma jet ignition plug, which includes a resistor R1, with one end connected to a diode D1 disposed between the plasma jet ignition plug 100 and a high-voltage generation circuit 210 and with the other end electrically connected to a center electrode 40 of the plasma jet ignition plug 100, and a capacitor C1, with one end connected to the center electrode 40 of the plasma jet ignition plug 100 and with the other end grounded.
    Type: Grant
    Filed: February 18, 2010
    Date of Patent: September 10, 2013
    Assignee: NGK SPark Plug Co., Ltd.
    Inventors: Daisuke Nakano, Yoshikuni Sato, Hiroyuki Kameda, Naofumi Yamamura, Daisuke Kasahara
  • Publication number: 20130192570
    Abstract: An ignition apparatus is provided with a Zener diode as a limiter device, which limits a primary voltage of an ignition coil to be less than a Zener voltage, and a switching circuit, which prohibits a limiter function of the Zener diode at a start of discharge and switches the limiter device to perform the limiter function for a predetermined time period following the start of discharge. A secondary voltage is limited to be more than a secondary limit value. Even when blowout arises in discharging, re-discharging is avoided from arising immediately after the blowout and exhaustion of a spark plug caused by repetition of discharging is avoided.
    Type: Application
    Filed: October 10, 2012
    Publication date: August 1, 2013
    Applicant: DENSO CORPORATION
    Inventor: DENSO CORPORATION
  • Patent number: 8490609
    Abstract: This invention relates to a method and system for generating energy/power in a capacitive discharge ignition system, said system comprising at least one charge winding (L) which by means of a fly wheel and via a first rectifier device (D1) charges a charge capacitor (C1) connected to a primary winding (P) of an ignition voltage transformer (30) in order to provide said primary winding (P) with energy for generation of a spark via a secondary winding (S) of said transformer (30), wherein a voltage control/switching unit (10) is arranged to enable output of energy (Out21) from said primary winding (P).
    Type: Grant
    Filed: February 4, 2009
    Date of Patent: July 23, 2013
    Assignee: Sem Aktiebolag
    Inventor: Johan Olsson
  • Patent number: 8316833
    Abstract: An ignition enhancer for a vehicle engine is installed between a conducting wire of a high voltage coil and a plug connector, provided with a capacitor, two conducting rods respectively extended outward from two ends of the capacitor, an insulation sleeve wrapping around the capacitor and filled with a waterproof resin to fully surround the capacitor, and two engaging grooves respectively formed in two ends of the insulation sleeve. Thus, with the conducting rods inserted in a core of the conducting wire of the high voltage coil and the plug connector respectively, the capacitor, storing an electric charge, is able to stabilize voltage and fulfill filtering to strengthen ignition power after starting a vehicle engine, not only advancing combustion efficiency to lower carbonization but also augmenting engine power.
    Type: Grant
    Filed: May 13, 2009
    Date of Patent: November 27, 2012
    Inventor: Feng-Kuei Chen
  • Patent number: 8150606
    Abstract: An electrical ignition method for a combustion engine employing the use of an arrangement of several coils and a magnet wheel or magnet generator which rotates synchronously with the combustion engine, wherein the magnetic field of the magnet generator intermittently flows through the coils and therein generates a sequence of magnetic flux changes per revolution, whereby a sequence of corresponding alternating voltage half-waves is induced in the coils, which are used for charging an energy storage element. Through the use of a stop and/or switch-off system for the combustion engine, the disclosed method prevents a discharge of the energy storage element during the stopping and coast down procedure of the combustion engine and/or to actuate its charging, so that a charged energy storage element is available for the next start of the combustion engine.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: April 3, 2012
    Assignee: Prufrex-Elektro-Apparatebau, Inh. Helga Muller, Geb Dutschke
    Inventors: Leo Kiessling, Marek Lajda
  • Patent number: 8096276
    Abstract: A plasma power supply circuit includes a DC/DC converter connected to a DC power supply and outputting a DC voltage, a voltage limit circuit limiting an output voltage from the DC/DC converter to a predetermined value, a PJ capacitor connected to an output end of the DC/DC converter and charged with electric energy used to generate a plasma in a discharge space of the spark plug, and a high-voltage switch connected between the PJ capacitor and the DC/DC converter and controlled to switch ON and OFF so that a charge period of the PJ capacitor is controlled according to running conditions of the internal combustion engine. Hence, the plasma ignition device can prevent damage on an electronic component incorporated therein even at the occurrence of a short and lessen damage on the internal combustion engine caused by an erroneous plasma jet ejection, wearing of the spark plug, and power consumption.
    Type: Grant
    Filed: August 10, 2010
    Date of Patent: January 17, 2012
    Assignee: Mitsubishi Electronic Corporation
    Inventors: Futoshi Aida, Hiroshi Okuda, Yuichi Muramoto, Yusuke Naruse
  • Publication number: 20110297131
    Abstract: A current of sufficient size to form plasma at ignition of a plasma jet ignition plug flows to a spark discharge gap while suppressing noise occurrence. There is provided an ignition apparatus of a plasma jet ignition plug, which includes a resistor R1, with one end connected to a diode D1 disposed between the plasma jet ignition plug 100 and a high-voltage generation circuit 210 and with the other end electrically connected to a center electrode 40 of the plasma jet ignition plug 100, and a capacitor C1, with one end connected to the center electrode 40 of the plasma jet ignition plug 100 and with the other end grounded.
    Type: Application
    Filed: February 18, 2010
    Publication date: December 8, 2011
    Inventors: Daisuke Nakano, Yoshikuni Sato, Hiroyuki Kameda, Naofumi Yamamura, Daisuke Kasahara
  • Patent number: 8049399
    Abstract: A spark-ignited, internal combustion engine ignition device to increase electrical transfer efficiency of the ignition by peaking the electrical power of the spark during the streamer phase of spark creation and improving combustion quality, incorporating an electrode design and materials to reduce electrode erosion due to high power discharge, an insulator provided with capacitive plates to peak the electrical current of the spark discharge, and concomitant methods.
    Type: Grant
    Filed: July 19, 2007
    Date of Patent: November 1, 2011
    Assignee: Enerpulse, Inc.
    Inventor: Louis S. Camilli
  • Patent number: 8033273
    Abstract: A plasma ignition system includes an ignition plug attached to an engine and having a center electrode, a ground electrode, and a discharge space, a discharge power source circuit, a plasma generation power source circuit, a resistance element between the discharge power source circuit and the center electrode, a rectifying device between the plasma generation power source circuit and the center electrode, and an element receiving portion in a periphery of the center electrode. The plug puts gas in the discharge space into a plasma state to ignite a fuel/air mixture in the engine, as a result of application of high voltage to the plug by the discharge power source circuit and supply of high current to the plug by the plasma generation power source circuit. The resistance element and the rectifying device are placed in the receiving portion.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: October 11, 2011
    Assignee: Denso Corporation
    Inventors: Hideyuki Kato, Tohru Yoshinaga, Masamichi Shibata
  • Publication number: 20100288250
    Abstract: An ignition enhancer for a vehicle engine is installed between a conducting wire of a high voltage coil and a plug connector, provided with a capacitor, two conducting rods respectively extended outward from two ends of the capacitor, an insulation sleeve wrapping around the capacitor and filled with a waterproof resin to fully surround the capacitor, and two engaging grooves respectively formed in two ends of the insulation sleeve. Thus, with the conducting rods inserted in a core of the conducting wire of the high voltage coil and the plug connector respectively, the capacitor, storing an electric charge, is able to stabilize voltage and fulfill filtering to strengthen ignition power after starting a vehicle engine, not only advancing combustion efficiency to lower carbonization but also augmenting engine power.
    Type: Application
    Filed: May 13, 2009
    Publication date: November 18, 2010
    Inventor: Feng-Kuei CHEN
  • Patent number: 7712458
    Abstract: The present invention refers to an apparatus for raising the spark energy in capacitive ignition systems comprising at least one charge winding (L1) which via a first rectifier device (D1) charges a charge capacitor (C1) connected to the primary winding of an 5 ignition voltage transformer in order to provide said primary winding with energy for generation of a spark characterized in that additionally a second rectifier device (D2) and a switching device (Q2) are arranged in such a way that the switching device periodically can short circuit the charge winding and thereby increase the charge of the charge capacitor at low engine speeds.
    Type: Grant
    Filed: April 2, 2007
    Date of Patent: May 11, 2010
    Assignee: SEM Aktiebolag
    Inventor: Johan Olsson
  • Patent number: 7699044
    Abstract: A capacitive discharge ignition system for an internal combustion engine and for use with a generator powered current source comprises a storage capacitor, at least one power thyristor for discharging the storage capacitor to transfer energy to at least one coil triggered in synchronism with an internal combustion engine with which the ignition system may be associated. A triggering circuit biases the power thyristor to discharge the storage capacitor. A shut-off circuit comprises a solid state device for switching the output of the generator to ground interrupting the flow of current to the power thyristor. A circuit sensing current flow in the triggering circuit generates a control and gates the solid state device into conduction in response to the control signal.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: April 20, 2010
    Assignee: Altronic, LLC
    Inventor: Joseph M. Lepley
  • Patent number: 7543578
    Abstract: An ignition assembly includes a power converter receiving an alternating current input, including a first capacitor and a second capacitor. The first capacitor and the second capacitor are charged in parallel to a first DC voltage and at a first polarity to discharge in series to an output at a second DC voltage that is greater than the first DC voltage. The second DC voltage is coupled to an ignition gap, and causes the ignition gap to ionize and form a spark. A switch is coupled to the first capacitor and is operable to control the discharge of the first capacitor and the second capacitor. An AC input switch is coupled to the AC input and is operable to control a flow of current from the AC input through the first capacitor and the second capacitor to the output. The flow of AC to the output sustains the ionization of the ignition gap.
    Type: Grant
    Filed: May 8, 2007
    Date of Patent: June 9, 2009
    Assignee: Continental Automotive Systems US, Inc.
    Inventor: Perry R. Czimmek
  • Patent number: 7509941
    Abstract: An apparatus and method for use with a carbureted internal combustion engine that accurately controls the amount of fuel that passes through the carburetor into the combustion chamber of the engine. A controlled triggering system controls the activation and deactivation of a solenoid. The solenoid, in turn, operates a plunger that varies the flow of fuel during the fuel intake cycle of the engine depending on the amount of fuel needed by the engine under any operating load. Thus, an engine can run leaner under partial load and run richer during periods of load and acceleration. By controlling the air-to-fuel ratio lower engine emissions and fuel consumption can be achieved.
    Type: Grant
    Filed: March 6, 2007
    Date of Patent: March 31, 2009
    Assignee: Phelon Euro AB
    Inventors: Lars Ottosson, Jorgen Bengtsson, Bert Gustafsson
  • Patent number: 7506640
    Abstract: An ignition system for an internal-combustion engine includes an ignition coil and an ignition control circuit. The ignition coil includes a primary coil and a secondary coil. The ignition control circuit includes a capacitor. The ignition control circuit employs a capacitor discharged ignition method, whereby the ignition control circuit is configured such that electrical charge, with which the capacitor is charged, is discharged into the primary coil to drive the ignition coil. A coupling coefficient, which indicates a degree of magnetic coupling between the primary coil and the secondary coil, is set in a range of 0.9 to 0.97. k, which is the coupling coefficient, is provided using a formula k=(1?L1?/L1)1/2, wherein L1 is an inductance of the primary coil and L1? is an inductance of the primary coil when the secondary coil is short-circuited.
    Type: Grant
    Filed: December 4, 2007
    Date of Patent: March 24, 2009
    Assignee: Denso Corporation
    Inventor: Atsuya Mizutani
  • Publication number: 20090007893
    Abstract: A plasma ignition system includes an ignition plug attached to an engine and having a center electrode, a ground electrode, and a discharge space, a discharge power source circuit, a plasma generation power source circuit, a resistance element between the discharge power source circuit and the center electrode, a rectifying device between the plasma generation power source circuit and the center electrode, and an element receiving portion in a periphery of the center electrode. The plug puts gas in the discharge space into a plasma state to ignite a fuel/air mixture in the engine, as a result of application of high voltage to the plug by the discharge power source circuit and supply of high current to the plug by the plasma generation power source circuit. The resistance element and the rectifying device are placed in the receiving portion.
    Type: Application
    Filed: June 30, 2008
    Publication date: January 8, 2009
    Applicant: DENSO CORPORATION
    Inventors: Hideyuki Kato, Tohru Yoshinaga, Masamichi Shibata
  • Publication number: 20080184977
    Abstract: A capacitive discharge ignition system in which a controllable switch is positioned between a storage capacitor and the primary winding of an ignition transformer. The switch is controlled to create a train of pulses to the primary winding timed to reinforce the ringing action of the ignition transformer.
    Type: Application
    Filed: February 2, 2007
    Publication date: August 7, 2008
    Applicant: ALTRONIC, INC.
    Inventor: Joseph M. Lepley
  • Patent number: 7156075
    Abstract: For stopping an internal combustion engine, a stop switch prevents the triggering of the ignition. A controller in the ignition circuit determines the state of the stop switch by evaluating signals on the state of the internal combustion engine, corresponding information data is generated, and a corresponding stop flag is set and/or enabled. Depending on this information, the activation of the ignition switch, that controls ignition spark, is either blocked or enabled by the controller.
    Type: Grant
    Filed: August 11, 2005
    Date of Patent: January 2, 2007
    Assignee: Prufrex-Elektro-Apparatebau, INH. Helga Muller geb Dutschke
    Inventor: Leo Kiessling
  • Patent number: 7095181
    Abstract: An apparatus for controllably generating sparks is provided. The apparatus includes a spark generating device; at least two output stages connected to the spark generating device; means for charging energy storage devices in the output stages and at least partially isolating each of the energy storage devices from the energy storage devices of the other output stages; and, a logic circuit for selectively triggering the output stages to generate a spark. Each of the output stages preferably includes: (1) an energy storage device to store the energy; (2) a controlled switch for selectively discharging the energy storage device; and (3) a network for transferring the energy discharged by the energy storage device to the spark generating device.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: August 22, 2006
    Assignee: Unsion Industries
    Inventors: John R. Frus, Michael J. Cochran
  • Patent number: 7066161
    Abstract: A capacitive discharge ignition (CDI) system for generating ignition sparks in an internal combustion engine comprises a single CDI module including a plurality of charge storage capacitor devices, a corresponding plurality of sets of ignition outputs, at least one charging circuit for charging at least one of the plurality of charge storage capacitor devices, and an ignition controller for selectively and individually controlling each of the plurality of charge storage capacitor devices and the at least one power supply circuit. Each of the plurality of charge storage capacitor devices is operatively coupled to the ignition outputs of one of the plurality of sets of ignition outputs. This allows for the single CDI module to power multiple, independent spark plugs either simultaneous of, immediately prior to or after each other while still delivering full energy to each ignition device.
    Type: Grant
    Filed: July 23, 2004
    Date of Patent: June 27, 2006
    Assignee: Advanced Engine Management, Inc.
    Inventors: John Edward Romero, Scott A. Furlong
  • Patent number: 6837229
    Abstract: The ignition device for an internal combustion engine includes two spark plugs provided for each cylinder, ignition coils arranged independently to each of the spark plugs, an ignition power source circuit for supplying electrical energy to first coils which constitute the ignition coils, and an ignition transistor circuit for switching on and off the electrical supply from the ignition power source circuit to the first coils. In the ignition device, the first coils corresponding to spark plugs that are provided to the same cylinder are connected in parallel with the ignition transistor circuit that is arranged to each cylinder. The ignition power source circuit is a circuit including an energy storage condenser for storing electrical energy supplied to the first coil. The electrical supply circuit is a circuit including an MOS-type field effect transistor.
    Type: Grant
    Filed: March 25, 2004
    Date of Patent: January 4, 2005
    Assignee: Denso Corporation
    Inventors: Atsuya Mizutani, Tetsuya Miwa
  • Patent number: 6414468
    Abstract: A system for deriving electrical power from an engine includes a current inducing module that supplies current to a load such as a chargeable power source. The current inducing module preferably includes a magnet and coil arrangement. The magnet is associated with a rotating element of the engine such that the magnet passes by the coil as the engine element rotates. The current that is induced in the coil is handled using current regulating components to control the amount of power supplied to the chargeable power source. The invention provides a way to electrically power components associated with devices that do not have a battery.
    Type: Grant
    Filed: September 29, 2000
    Date of Patent: July 2, 2002
    Assignee: Siemens Automotive Corporation
    Inventors: Robert E. Weber, Henry C. Dozier
  • Patent number: 6353293
    Abstract: An apparatus for controllably generating sparks is provided. The apparatus includes a spark generating device; at least two output stages connected to the spark generating device; means for charging energy storage devices in the output stages and at least partially isolating each of the energy storage devices from the energy storage devices of the other output stages; and, a logic circuit for selectively triggering the output stages to generate a spark. Each of the output stages preferably includes: (1) an energy storage device to store the energy; (2) a controlled switch for selectively discharging the energy storage device; and (3) a network for transferring the energy discharged by the energy storage device to the spark generating device.
    Type: Grant
    Filed: March 6, 2000
    Date of Patent: March 5, 2002
    Assignee: Unison Industries
    Inventors: John R. Frus, Michael J. Cochran
  • Patent number: 6283103
    Abstract: An ignition system, of the type having ignition coils supplying energy to spark plugs in an internal combustion engine, includes apparatus to measure an electrical characteristic indicative of spark duration and generate a representative spark duration signal therefrom, or alternately to directly measure spark duration and generate a representative spark duration signal. Computational circuitry receives the spark duration signal and a spark duration setpoint signal, computes the error between the setpoint and the actual spark duration on a real-time basis, and modulates the energy in the high energy power supply to the ignition coils for maintaining a constant spark duration.
    Type: Grant
    Filed: April 13, 1999
    Date of Patent: September 4, 2001
    Assignee: Woodward Governor Company
    Inventor: Gary R. Hoeflich
  • Patent number: 5992401
    Abstract: A capacitive discharge ignition system deriving the ignition pulse from a capacitor storing the flyback voltage induced from the fuel injector coil when the pulse supplied to the fuel injector coil is removed.
    Type: Grant
    Filed: September 10, 1997
    Date of Patent: November 30, 1999
    Assignee: Outboard Marine Corporation
    Inventors: Philip J. Bylsma, Michael J. French
  • Patent number: 5595147
    Abstract: A contra-rotating twin crankshaft system for internal combustion engines. Two crankshafts are arranged in parallel, and are connected together to rotate in opposite directions. At least one piston is spaced from the crankshafts. Connecting rod assemblies extend in a crossed relationship from each crankshaft to two spaced wristpins at the piston. Preferably, one connecting rod assembly is made up of two spaced connecting rods and the other is a single connecting rod which passes between the two spaced connecting rods to form the crossing relationship. If desired, the dual connecting rod assembly may be two spaced single connecting rods or have one connecting rod in the form of a fork, with the single connecting rod passing between the tines of the forked connecting rod.
    Type: Grant
    Filed: December 15, 1995
    Date of Patent: January 21, 1997
    Inventor: James J. Feuling
  • Patent number: 5531206
    Abstract: A method and apparatus for a flyback control circuit wherein primary coil current is minimized during flyback operation such that the spark duration and energy delivered to the spark gap are maximized.
    Type: Grant
    Filed: March 27, 1995
    Date of Patent: July 2, 1996
    Inventors: Mark R. Kitson, Peter J. Ayre
  • Patent number: 5530617
    Abstract: An oscillatory discharge exciter includes an input connectable to a power supply; an output connectable to an igniter; at least two energy storage elements for producing an oscillatory discharge of energy during an exciter discharge period; a unidirectional gated switch and a rectifier coupled in reverse parallel with each other such that the switch and rectifier control, during respective alternating half cycles, oscillatory discharge energy at the exciter output; and a circuit for gating the switch in response to voltage transitions across the switch. The gating circuit can also be used as a snubber circuit to add gate drive to slow devices, as well as to trigger a series of switching devices with the application of only a single external trigger signal to one of the devices. In an alternative embodiment, the gating circuit is replaced with a circuit for maintaining holding current through the switch to prevent the switch from recovering to a blocking condition.
    Type: Grant
    Filed: May 12, 1994
    Date of Patent: June 25, 1996
    Assignee: Simmonds Precision Engine Systems, Inc.
    Inventors: Howard V. Bonavia, Dale F. Geislinger
  • Patent number: 5510952
    Abstract: An ignition system for a gas turbine engine includes a plurality of igniters, an energy storage capacitance, a charging circuit for charging the capacitance, a plurality of gated switches, with at least one switch connected between each igniter and the capacitance, and control means for discharging respective amounts of energy from the capacitance to each respective igniter at respective spark rates.
    Type: Grant
    Filed: March 1, 1995
    Date of Patent: April 23, 1996
    Assignee: Simmonds Precision Engine Systems Inc.
    Inventors: Howard V. Bonavia, John E. Killean
  • Patent number: 5488536
    Abstract: An exciter for an internal combustion engine igniter plug includes a charging circuit and a discharge circuit; the charging circuit being connectable to a power supply and the discharge circuit being connectable to the plug to produce sparks; the discharge circuit comprising a storage capacitor connected to the charging circuit, a gated solid state switching device connected between the capacitor and the plug, and a trigger means for gating the switching device on and off; the capacitor being discharged when the switching device is gated on and the capacitor being charged by the charging circuit after the switching device is gated off.
    Type: Grant
    Filed: April 1, 1993
    Date of Patent: January 30, 1996
    Assignee: Simmonds Precision Engine Systems, Inc.
    Inventors: Howard V. Bonavia, Dale F. Geislinger
  • Patent number: 5371436
    Abstract: An ignitor (118) comprises a body portion (120) connected with an electrical supply cable (122) and an electrode portion (124) removably mounted within the body portion (120). The body portion (120) includes a capacitor defined by an outer, electrically conductive shell (126) of the body portion, and an inner, tubular capacitor plate (134). The inner, tubular capacitor plate (134) is held within the body portion (120) by means of a connector assembly (132) which is held in place by a dielectric potting compound (136).
    Type: Grant
    Filed: January 2, 1990
    Date of Patent: December 6, 1994
    Assignee: Hensley Plasma Plug Partnership
    Inventors: James E. Griswold, Ronald P. Corio, Ronald C. Pate
  • Patent number: 5272415
    Abstract: An ignitor (10) for initiation combustion of fuel in an internal combustion engine includes a body portion (12) and a removable electrode portion (14) to permit replacement or repair of the electrodes, so that current is delivered to one of the electrodes (72) along a path through each of the capacitive elements. The body portion includes a pair of capacitive elements defined by longitudinally spaced, radially extending, annular capacitor plates (60, 62, 64, 66) which surround the central electrode (26, 72). The body portion includes an outer, cylindrical shell (16) which is insulated from the capacitive elements by layers (40, 42) of high dielectric material.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: December 21, 1993
    Assignee: Hensley Plasma Plug Partnership
    Inventors: James E. Griswold, Ronald P. Corio, Ronald C. Pate
  • Patent number: 5207208
    Abstract: A high power high energy capacitive discharge (CD) ignition system for internal combustion engines using a separate resonating inductor (7) in the discharge circuit which is constructed and arranged to provide suitable operation of the discharge circuit and to allow coupling of energy from a voltage source (13a) for storage in the inductor (7) for delivery to the CD system discharge capacitor (4) during the operation of the ignition to help maintain energy during the preferred mode of multiple spark pulse firings of an ignition spark in a preferred large toroidal gap spark plug and to recharge the capacitor (4) between firings.
    Type: Grant
    Filed: June 16, 1992
    Date of Patent: May 4, 1993
    Assignee: Combustion Electromagnetics Inc.
    Inventor: Michael A. V. Ward
  • Patent number: 5178120
    Abstract: This invention discloses a system for initiating and enhancing combustion of fuel and fuel-air mixtures by discharging electrical energy in a spark gap. The energy to breakdown the spark gap is supplied by a high voltage direct current source which supplies a voltage high enough to cause initiation of the spark without the need for an intermediate transformer. Control of the high voltage is by way of a semiconductor switch, which is preferably a bulk photoconductive switch. Such a switch is capable of withstanding the high voltage applied across it when it is switched off. There may also be provided a further source of high voltage which supplies energy to the spark gap at a lower voltage then the first source after the spark has been initiated. Thus the length of time the spark lasts for may be controlled. This is particularly useful for use with lean fuel mixtures for fuel economy or with diluted fuel mixtures diluted through exhaust gas recirculation for reduced emissions.
    Type: Grant
    Filed: June 28, 1991
    Date of Patent: January 12, 1993
    Assignee: Cooper Industries, Inc.
    Inventors: Peter Howson, Didier De Wit
  • Patent number: 5049786
    Abstract: A constant energy, constant spark rate ignitor system suitable for use in high energy ignition systems. The ignitor system includes a vacuum interrupter switch through which an energy storage capacitor discharges to fire a surface gap spark plug. Discharge of the energy storage capacitor through the vacuum interrupter can only occur upon actuation of the switch. The quantity of energy stored in the energy storage capacitor and the timing of capacitor discharge is therefore not a function of ambient operating conditions or the dielectric properties of the switch and can therefore be independently controlled. A voltage comparator and spark rate clock are used to trigger closure of the vacuum interrupter switch and fire the plug when the capacitor contains the desired quantity of energy and a clock signal is present. A current proving circuit is also provided to verify that current passes through the spark plug.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: September 17, 1991
    Assignee: Coen Company, Inc.
    Inventors: Ted Gotisar, Ronald J. Jensen
  • Patent number: 4907562
    Abstract: The invention relates to a method for achieving elevated charging of an ignition capacitor in a capacitive type ignition system for internal combustion engines. When starting a cold engine or when starting the engine under other conditions in which the battery capacity is low, activation of the engine starting motor will result in a drop in voltage in the electric system serving both the starting motor and the ignition system. The voltage drop in the electrical system will vary sinusoidally synchronously with the crankshaft rotation, owing to the fact that the starting motor will momentarily subject the electrical system to higher loads when the pistons are located adjacent their top-dead-center position L in the compression stroke. The method solves this problem, by delaying the re-charging of the capacitor until a position is reached in which the voltage drop in the electrical system has its lowest value.
    Type: Grant
    Filed: November 18, 1988
    Date of Patent: March 13, 1990
    Assignee: Saab-Scania Aktiebolag
    Inventors: Hans Johansson, Jan Nytomt
  • Patent number: 4886036
    Abstract: In a capacitive ignition system for an internal combustion engine, the discharging and charging of an ignition capacitor is controlled by a control unit which actuates a first circuit-breaking element in a discharging circuit and a second circuit-breaking element in a charging circuit. For the purpose of prolonging the ignition sparks so as to reliably ignite, especially in a lean fuel/air mixture, the control unit, at a time following the ordinary ignition time, actuates the second circuit-breaking element in such a way that it is kept conductive simultaneously with the first circuit-breaking element. Current is then supplied from an electrical energy source and via a primary winding. Thereafter, the control unit actuates either the first or second circuit-breaking elements in such a way that the current supply via the primary winding is interrupted, by which means a renewed ignition voltage is obtained which prolongs the ordinary ignition spark.
    Type: Grant
    Filed: April 21, 1988
    Date of Patent: December 12, 1989
    Assignee: Saab-Scania Aktiebolag
    Inventors: Sven H. Johansson, Jan G. Nytomt
  • Patent number: 4868730
    Abstract: A DC to DC power converter designated a synchronous current pump (13) and operated in the preferred mode in synchronization with a discharge circuit (11) and using a capacitor (28) as the energy storage element, and in the preferred embodiment has in series with said capacitor the battery supply (10), an inductor (30), a diode (27a), and the primary winding (31a) of a transformer (31); and across said storage capacitor is an energy transfer FET switch (33) which is used for discharging said capacitor and transferring it stored energy to a output load capacitor (4) connected through a diode (32) to the secondary winding of said transformer. In operation, the current pump supplies power efficiently and smoothly to a load discharge capacitor in synchronization with operation of the discharge circuit.
    Type: Grant
    Filed: December 11, 1987
    Date of Patent: September 19, 1989
    Assignee: Combustion Electromagnetics, Inc.
    Inventor: Michael A. V. Ward
  • Patent number: 4848287
    Abstract: Disclosed is a method for controlling the spark ignition in an Otto engine, of the type including an ignition voltage-generating ignition system with a spark plug electrode fixedly arranged in the combustion chamber of the engine and with an earth electrode co-operating movably therewith and joined fixedly to the engine piston in question. For the purpose of producing a controlled ignition moment in such engines the ignition moment is controlled so as to occur later and with shorter sparking distance when the engine load increases from light load to whole load. At the same time, the ignition voltage necessary for spark formation is controlled so as to vary within relatively narrow limits over essentially the whole load range.
    Type: Grant
    Filed: January 26, 1988
    Date of Patent: July 18, 1989
    Assignee: Saab-Scania Akt.
    Inventors: Per S. Gillbrand, Sven H. Johansson, Jan G. Nytomt