Interrupter Is Multiple Transistor Circuit Patents (Class 123/651)
  • Patent number: 10784253
    Abstract: A semiconductor device includes a substrate and a source metal formed on the substrate. A gate pad is formed on the substrate adjacent to the source metal. A gate metal is formed on the substrate and surrounds the gate pad and the source metal. A first diode is formed between the gate metal and the source metal.
    Type: Grant
    Filed: December 9, 2016
    Date of Patent: September 22, 2020
    Assignee: Magnachip Semiconductor, Ltd.
    Inventors: Soo Chang Kang, Seung Hyun Kim, Yong Won Lee
  • Patent number: 10514016
    Abstract: A circuit and method for gradually reducing a coil current during a shutdown period is disclosed. The circuit and method include a controller that is configured in a control loop with a current sensor that measures the current in the coil and a transistor that can be controller to limit the current in the coil. The open-loop gain of the controller is determined by a resistance of a variable feedback resistor, and the resistance of the variable feedback resistor is reduced during the shutdown period as the coil current becomes small. The reduction of the resistance maintains a suitable phase margin by lowering the open loop gain of the circuit for low coil currents. Thus during shutdown, the circuit provides control accuracy for high coil currents and control stability for low coil currents.
    Type: Grant
    Filed: July 25, 2018
    Date of Patent: December 24, 2019
    Assignee: Semiconductor Components Industries, LLC
    Inventor: Yasuhiro Nodake
  • Patent number: 10325902
    Abstract: A semiconductor device includes a first bidirectional diode of a ring shape surrounding a central region and including a first connection section and a second connection section which is provided to the inner side of the ring shape from the first connection section, a semiconductor element in the central region including a first semiconductor element electrode, a second semiconductor element electrode, and a control electrode, the first semiconductor element electrode electrically connected to the first connection section and the second semiconductor element electrode electrically connected to the control electrode, a first resistor including a first resistor electrode and a second resistor electrode, the first resistor electrode electrically connected to the second connection section and the control electrode, a second bidirectional diode electrically connected to the second resistor electrode and to the second semiconductor element electrode, and a second resistor element electrically connected to the secon
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: June 18, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Ryuta Arai, Hidetoshi Asahara, Makoto Tsuzuki
  • Patent number: 9518553
    Abstract: The invention relates to an ignition device for an Otto engine, comprising an ignition coil, a printed circuit board, which carries a control circuit with a power transistor, a plastic housing, in which the ignition coil and the printed circuit board are arranged, and a thermal dissipation element, which protrudes through a wall of the plastic housing. In accordance with this disclosure, the printed circuit board carries a cooling body, which is plugged together with the thermal dissipation element to form a thermal bridge, which dissipates thermal losses of the control circuit out from the plastic housing.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: December 13, 2016
    Assignee: BorgWarner Ludwigsburg GmbH
    Inventors: Johann Weissenbacher, Matthias Krause, Siegmund Oberer
  • Patent number: 9489022
    Abstract: A semiconductor device includes a memory bank, a data line and a data line control unit. The memory bank stores data. The data line transfers data to be stored in or output from the memory bank. The data line control unit initializes the data line in response to a power-up signal and a write command.
    Type: Grant
    Filed: December 9, 2013
    Date of Patent: November 8, 2016
    Assignee: SK hynix Inc.
    Inventor: Kwang Hyun Kim
  • Patent number: 8836042
    Abstract: A semiconductor device includes an IGBT, a constant voltage circuit, and protection Zener diodes. The IGBT makes/breaks a low-voltage current flowing in a primary coil. The constant voltage circuit and the protection Zener diodes are provided between an external gate terminal and an external collector terminal. The constant voltage circuit supplies a constant gate voltage to the IGBT to thereby set a saturation current value of the IGBT to a predetermined limiting current value. The IGBT has the saturation current value in a limiting current value range of the semiconductor device.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: September 16, 2014
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Katsunori Ueno
  • Patent number: 7341051
    Abstract: The catalyzer is applicable in the ignition of gasoline engines of transportation vehicles, generates, stand alone and stationary machines and others. Its advantage is that it has a higher quality of the ignition and an increased efficiency. The first version of the electronic high frequency plasma catalyzer by standard ignition with a mechanical distributor consists of a constant current power supply—battery (1) and a standard ignition system of the petrol engine, which contains a microprocessor (2) with a built in it electronic switch (K). To the information input of the microprocessor there is joined up a sensor (D) for obtaining of a start and synchronizing signal, received from the mechanical distributor. The output of the electronic switch (K) is connected to the one end of a high voltage ignition coil (3), joined up with the plus pole of the battery via a key (4).
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: March 11, 2008
    Inventor: Hristo A. Batchvarov
  • Publication number: 20080006253
    Abstract: The catalyzer is applicable in the ignition of gasoline engines of transportation vehicles, generators, stand alone and stationary machines and others. Its advantage is that it has a higher quality of the ignition and an increased efficiency. The first version of the electronic high frequency plasma catalyzer by standard ignition with a mechanical distributor consists of a constant current power supply—battery (1) and a standard ignition system of the petrol engine, which contains a microprocessor (2) with a built in it electronic switch (K). To the information input of the microprocessor there is joined up a sensor (D) for obtaining of a start and synchronizing signal, received from the mechanical distributor. The output of the electronic switch (K) is connected to the one end of a high voltage ignition coil (3), joined up with the plus pole of the battery via a key (4).
    Type: Application
    Filed: August 18, 2006
    Publication date: January 10, 2008
    Inventor: Hristo A. Batchvarov
  • Patent number: 7207325
    Abstract: An ignition system for an internal combustion engine includes a switch circuit connected to an ignition coil to switch on or off current supplied to the ignition coil, a control circuit for providing a control signal for controlling the switch circuit based on the ignition signal and a protection circuit including an input terminal that receives the ignition signal, an NPN transistor having a collector connected to the input terminal, an emitter connected to a ground, a base and the collector and a parasitic diode between the collector and the emitter of the NPN transistor, in which a prescribed capacitance is formed between the base and the collector of the NPN transistor. If an electric surge that has an ascending slope comes into the input terminal, the NPN transistor to turn on to discharge the electric surge to a ground. If an electric surge that has an descending slope comes into the input terminal, it passes through the parasitic diode toward the input terminal.
    Type: Grant
    Filed: August 2, 2005
    Date of Patent: April 24, 2007
    Assignee: Denso Corporation
    Inventor: Koji Ando
  • Patent number: 7131436
    Abstract: An ignition system for an internal combustion engine is connected to an ignition coil and to a circuit for providing an ignition signal. The ignition system includes a switch circuit connected to the ignition coil that switches on or off current supplied to the ignition coil, a control circuit that controls the switch circuit based on the ignition signal and a protection circuit that includes a pair of back-to-back connected zener diodes connected between the input terminal of the control circuit and a ground.
    Type: Grant
    Filed: August 2, 2005
    Date of Patent: November 7, 2006
    Assignee: DENSO Corporation
    Inventors: Haruo Kawakita, Koji Ando
  • Patent number: 7080639
    Abstract: A circuit for controlling an ignition coil is provided. The circuit includes a first transistor, second transistor, and a capacitor. The first transistor is connected in electrical series between the ignition coil and a voltage reference. The capacitor is connected between the ignition coil and a control input of the first transistor. The second transistor is configured to selectively connect the capacitor to the voltage reference.
    Type: Grant
    Filed: June 30, 2005
    Date of Patent: July 25, 2006
    Assignee: Visteon Global Technologies, Inc.
    Inventor: Tom I. Pattantyus
  • Patent number: 7051724
    Abstract: An igniter of the present invention has an insulated gate semiconductor device having a collector terminal, an emitter terminal and a gate terminal, a current control circuit which limits current by controlling voltage at the gate terminal when current for flowing through the insulated gate semiconductor device exceeds a fixed value, a voltage monitor circuit for detecting a potential of the collector, and a control current adjusting circuit for controlling current which flows through the gate terminal by receiving output from the voltage monitor circuit.
    Type: Grant
    Filed: December 13, 2002
    Date of Patent: May 30, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Junpei Uruno, Yasuhiko Kouno
  • Patent number: 7007683
    Abstract: An internal combustion engine ignition apparatus includes a switching circuit having no power supply terminal connected to a power supply such as a battery is constructed, and including an output terminal connected to an ignition coil, an input terminal for receiving an ignition signal voltage and a reference potential terminal connected to a reference potential. In the switching circuit, the terminal structure is simplified, and energization timing and ignition timing can be set more accurately. A current supply circuit is connected between the input terminal and the reference potential terminal, and a current is supplied from the current supply circuit to a drive resistor of the switching element. In this current supply circuit, an energization timing when supply of the driving current is started is controlled by a waveform shaping circuit operating by the ignition signal voltage, and an ignition timing when the driving current is interrupted is controlled.
    Type: Grant
    Filed: March 16, 2004
    Date of Patent: March 7, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yusuke Naruse, Hisanori Nobe
  • Patent number: 6935323
    Abstract: A system for firing a spark plug is disclosed. The system includes a timing controller configured to send a first timing signal and a second timing signal. The system also includes an ignition transformer having a primary winding and a secondary winding and a spark-plug that is operably associated with the secondary winding. A first switching element is disposed between the timing controller and the primary winding of the ignition transformer. The first switching element controls a supply of power to the primary winding based on the first timing signal. Also, a second switching element is disposed between the timing controller and the primary winding of the ignition transformer. The second switching element controls the supply of power to the primary winding based on the second timing signal. A method for firing a spark plug is also disclosed.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: August 30, 2005
    Assignee: Caterpillar Inc
    Inventors: Stephen Howard Waters, Anthony Kok-Fai Chan
  • Patent number: 6848437
    Abstract: The ignition device for an internal combustion engine includes, a control unit (1) for outputting an ignition signal used to determine a time when an ignition plug (8) should be ignited, a switching unit (5) connected to the other terminal of a primary coil for cutting off the flow of a primary current, and a drive unit (4) for turning ON or OFF the switching unit (5) in response to the ignition signal to adjust a voltage to be applied to a gate of the switching unit (5).
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: February 1, 2005
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yusuke Naruse, Hisanori Nobe
  • Patent number: 6814066
    Abstract: An internal combustion engine ignition device able to suppress misfires etc. at abnormal times and achieving smaller size and lower cost, provided with an IGBT (switching device SW), a current limiting circuit for limiting a primary current running through the IGBT to within a predetermined value, a fast gate voltage drop circuit for making the gate voltage of the IGBT fast drop to an extent where spark discharge occurs at the spark plug, an abnormality detecting circuit for detecting an abnormal state of an igniter or electronic control unit and outputting an abnormality detection signal, and a slow gate voltage drop circuit having a gate voltage feed cutoff circuit for cutting off the feed of the gate voltage at an abnormal time and a discharge circuit for discharging the gate capacitor charge of the IGBT to make the gate voltage slowly drop to an extent where no spark discharge will occur at the spark plug.
    Type: Grant
    Filed: April 6, 2004
    Date of Patent: November 9, 2004
    Assignee: Denso Corporation
    Inventor: Koji Ando
  • Patent number: 6777748
    Abstract: A bidirectional semiconductor component having two symmetrical MOS transistor structures integrated laterally in a substrate and connected antiserially, their drain terminals being connected to one another. A zone having the same type of conductivity as the drain region yet a higher doping than that of the drain region is situated upstream from a pn junction of one of the MOS transistors in a junction area with the drain region.
    Type: Grant
    Filed: May 9, 2002
    Date of Patent: August 17, 2004
    Assignee: Robert Bosch GmbH
    Inventors: Robert Plikat, Wolfgang Feiler
  • Patent number: 6771519
    Abstract: A power supply is described that comprises two or more flyback-type, DC-to-DC converters having substantially the same periods for their respective charge-discharge cycles; inputs from a common power source; outputs that are connected to a common output node and circuitry for controlling the charge-discharge cycles of the two or more converters so that the cycles of one converter is out of phase with respect to the charge-discharge cycles of at least one of the other converters.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: August 3, 2004
    Assignee: Unison Industries, Inc.
    Inventors: John R. Frus, Michael J. Cochran
  • Patent number: 6758200
    Abstract: A product, product by process, and process according to the present invention integrates an ignition coil driver electronics or ignitor into a plughole coil housing. Electronic components are mounted directly to a printed circuit board serving as a direct connection to connector terminals and/or coil leads via plated-apertures. If required, at least one protective layer can be applied directly to an external surface of at least some of the electronic components mounted on the printed circuit board to compensate for differences in the coefficients of thermal expansion. The protective layer is selected from a group including a conformal coating, a soft buffer material, a hard epoxy globtop, and combinations thereof.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: July 6, 2004
    Assignee: Delphi Technologies, Inc.
    Inventors: Diane E. Hageman, Raymond O. Butler, Jr., Albert Anthony Skinner
  • Patent number: 6748937
    Abstract: A solid-state Hall effect ignition system which requires connection to only a single ignition coil lead wire. The lead wire connects to both an output transistor and to power supply circuitry arranged to provide an internal bias or supply voltage for the solid-state ignition circuitry. Current limiting and automatic shut-off features dwell control, and polarity protection are also provided.
    Type: Grant
    Filed: October 26, 2001
    Date of Patent: June 15, 2004
    Inventor: Lawrence E. Soza
  • Patent number: 6679237
    Abstract: A drive circuit for an ignition system includes an ignition coil and spark plug associated with each cylinder of an internal combustion engine. Each ignition coil has a primary winding with the first end connectable to a power source and a second end opposite the first end connected to a silicon-control rectifier (SCR). Each coil also has a secondary winding connectable to a respective spark plug. The SCR may be integrated with the coil. A main driver device is connected between the other end of the SCR and ground. The driver device is configured to conduct a primary current in response to a drive signal. The SCRs are controlled into conduction by a respective gating signal. A control circuit is configured to generate the gating signals and the drive signal in response to one or more ignition control signals. An SCR for each coil is used to select which coil is allowed to carry current when the main driver is turned on.
    Type: Grant
    Filed: August 6, 2002
    Date of Patent: January 20, 2004
    Assignee: Delphi Technologies, Inc.
    Inventors: Albert Anthony Skinner, Ronald J. Kiess, Raymond O. Butler, Jr.
  • Patent number: 6662792
    Abstract: A capacitor discharge ignition (CDI) system is capable of generating intense continuous electrical discharge at a spark gap for a desired duration and may include a second controllable power switching circuit with its input terminal connected to an output terminal of a high voltage DC source device. An output terminal of the second controllable power switching circuit is connected to an input terminal of a first power switching circuit. The second controllable power switching circuit may also have a control terminal connected to an output of a controller. The first controllable power switching circuit may be used for discharging a discharge capacitor, and the second controllable power switching circuit may cause charging of the discharge capacitor. As such, an ignition current through an ignition coil of the system is enabled for any desired number of cycles during both the charge and discharge cycles of the discharge capacitor.
    Type: Grant
    Filed: September 26, 2002
    Date of Patent: December 16, 2003
    Assignee: STMicroelectronics Pvt. Ltd.
    Inventors: Saibal Dutt, Nabarun Dasgupta, Nikhil Kulshrestha
  • Patent number: 6591821
    Abstract: The present invention comprises an Electronics Control Unit (ECU) power potential stabilizing circuit and an ECU reference potential stabilizing circuit. The ECU power potential stabilizing circuit eliminates noise and stabilizes voltage variation occurring when the electrical parts of automobile are activated by the power supplied through the ECU of the electronic accelerator, by impressing it to the power supply line and variable voltage supply line. The ECU reference potential stabilizing circuit eliminates the unnecessary spark noise and harmonics noise occurring on the power supply line, reference potential line and variable voltage supply line, by impressing it to the variable voltage supply line and reference potential line. It further stabilizes the voltage supplied to the ECU by compensating the voltage fluctuated due to disturbances.
    Type: Grant
    Filed: May 13, 2002
    Date of Patent: July 15, 2003
    Inventor: Yong-Shik Kong
  • Publication number: 20030121509
    Abstract: An ignition system and a method for operating an ignition system provides reliable suppression of a closing spark ignition at relatively small expense and to achieve a reliable ignition by the ignition spark. To assure a high energy supply to the spark plug, an ignition system is created having a functional device for receiving a drive signal and for producing a pulse signal, an ignition transistor for receiving the pulse signal, an ignition coil, whose primary winding connections are connected in a primary current circuit that is fed by a vehicle power supply source and that can be switched using the ignition transistor, and whose secondary winding connections are connected in a secondary current circuit for receiving a spark plug.
    Type: Application
    Filed: November 13, 2002
    Publication date: July 3, 2003
    Inventor: Helmut Schmied
  • Publication number: 20030084889
    Abstract: An AC ignition system for an internal combustion engine having a voltage source, an ignition coil coupled to the voltage source and at least one spark plug having a spark gap, the ignition coil has a primary winding and a secondary winding, the secondary winding has a high turn ratio with respect to the primary winding. The primary winding is electrically coupled to the voltage source and the secondary winding is electrically connected to the spark gap. A switch is connected in series with the primary winding and is configured for movement between an open position and a closed position the closed position electrically couples the voltage source to the primary winding. The ignition coil generates a make voltage after the primary winding is coupled to the voltage source. The make voltage is sufficient to ionize the spark gap.
    Type: Application
    Filed: November 5, 2001
    Publication date: May 8, 2003
    Inventors: Albert Anthony Skinner, Raymond O. Butler
  • Patent number: 6557537
    Abstract: A battery, an energy charge inductance, and a first transistor are connected in series in an ignition system. A primary winding and a second switching device are connected in series between the ground and a point between the energy charge inductance and the first switching device. A drive circuit switches periodically on and off the first switching device and the second switching device during multispark duration of the spark plug such that each switching device has a different switching status from each other. After the multispark duration, the drive circuit switches periodically on and off the second transistor with a short switching interval. The switching interval is set such that a relatively low voltage that almost causes a spark is impressed to the spark plug. An ion current detection is implemented by using this voltage as a power source.
    Type: Grant
    Filed: December 3, 2001
    Date of Patent: May 6, 2003
    Assignees: Denso Corporation, Nippon Soken, Inc.
    Inventors: Masatoshi Ikeda, Hiroshi Yorita, Makoto Toriyama
  • Publication number: 20020104519
    Abstract: Durability and lifetime of a resin sealed electronic device is improved by reducing thermal stresses acting on the power element and the parts mounting on the board.
    Type: Application
    Filed: January 9, 2002
    Publication date: August 8, 2002
    Applicant: Hitachi, Ltd
    Inventors: Satoshi Hirakawa, Toshiaki Kaminaga, Ryoichi Kobayashi, Noboru Sugiura
  • Patent number: 6425383
    Abstract: An apparatus for a distributorless ignition system which responds to an ignition signal pulse train which is related to the compression and exhaust strokes of an internal combustion engine. The apparatus includes at least one ignition coil having a primary winding, a secondary winding, and a core, wherein the primary winding and the secondary winding are wrapped about the core, and the primary winding has a first end and a second end; a pair of spark plugs for each ignition coil, wherein the spark plugs are connected between opposite ends of the secondary winding and electrical ground; and a circuit connected to the first end and the second end of the primary winding for directing electrical current through the primary winding in an opposite direction during each successive ignition signal pulse such that the spark plugs simultaneously fire after each ignition signal pulse.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: July 30, 2002
    Assignee: Federal-Mogul World Wide, Inc.
    Inventors: Frank John Raeske, Carl Richard Blaesing
  • Patent number: 6336448
    Abstract: In an ignition semiconductor device, a self-shut down circuit forcibly turns off an IGBT when an input signal is continuously applied. The self-shut down circuit is formed of a main-current gradual-reduction circuit having a timer circuit, a capacitor, a resistor, and an FET. When the timer circuit, which is actuated when the input signal is input, counts out, the FET is turned on to cause a capacitor, which is connected parallel to a resistor for producing a reference voltage for a current-limiting circuit, to discharge slowly through the resistor, thereby gradually reducing the reference voltage. Correspondingly, the current-limiting circuit reduces the main current to turn off the IGBT. The slow turn-off operation of the IGBT prevents a high voltage from being generated in the ignition coil.
    Type: Grant
    Filed: August 15, 2000
    Date of Patent: January 8, 2002
    Assignee: Fuji Electric Co., Ltd.
    Inventors: Shoichi Furuhata, Minoru Nishio
  • Patent number: 6286491
    Abstract: A mesh structure portion is provided at a part of a stripe structure IGBT chip, gate resistance of a respective minute IGBT is reduced and in a gate portion chip a filter is constituted by a resistor and a condenser. Under a severe environment such as an integrated ignition coil, a small size and a low cost ignitor which can use without a necessity for a protection circuit by a peripheral circuit can be provided. An ignition apparatus having IGBT which is strong against serge resistant performance and noise resistant performance can be obtained.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: September 11, 2001
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Katsuaki Fukatsu, Ryoichi Kobayashi, Takashi Ito
  • Patent number: 6279558
    Abstract: In an ignition apparatus, voltage is induced in a primary coil by a permanent magnet being rotated together with rotation of an output shaft of an engine. As the output shaft rotates, protrusions also revolve, inducing voltage in an electromagnetic pickup. Depending on the induced voltage in the pickup, a switching element is switched on or off. The switching-off timing of the switching element is set as an ignition timing. Therefore, at the ignition timing, the current through the primary coil is sharply cut off, so that great voltage is induced in a secondary coil and is applied to an ignition plug.
    Type: Grant
    Filed: January 21, 2000
    Date of Patent: August 28, 2001
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Daiki Fukuda
  • Patent number: 6189522
    Abstract: A distributorless ignition system is provided which includes an ignition coil for firing a pair of first and second spark plugs at the same time. The ignition system includes a changeover switch which, when assuming one operating position, causes the first spark plug to produce negative polarity spark and the second spark plug to produce positive polarity spark and, when assuming another operating position, causes the first spark plug to produce positive polarity spark and the second spark plug to produce negative polarity spark. The operating position of changeover switch is changed every time the number of sparks produced by each of the first and second spark plugs becomes two. By this, the number of negative polarity sparks and the number of positive polarity sparks produced by each of the first and second spark plugs on compression stroke at its corresponding cylinder over a long period of time are the same.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: February 20, 2001
    Assignee: NGK Spark Plug Co., Ltd.
    Inventor: Toru Moriya
  • Patent number: 6167876
    Abstract: A circuit arrangement of an ignition output stage, in particular for an ignition circuit of a motor vehicle, is described. The circuit arrangement includes a multiple Darlington transistor (Darlington) which drives a primary winding of an ignition coil, as well as a driving circuit for the Darlington. An n-p-n Darlington is provided, whose collector is connected to the positive terminal of a voltage source and whose emitter is connected to a first terminal of the primary winding of the ignition coil. The second terminal of the primary winding is connected to ground. The Darlington is driven via a decoupling element which isolates the driving circuit from a negative reverse voltage present at the base of the Darlington when the latter is turned off.
    Type: Grant
    Filed: September 7, 1999
    Date of Patent: January 2, 2001
    Assignee: Robert Bosch GmbH
    Inventors: Manfred Uebele, Horst Meinders, Ning Qu
  • Patent number: 6055969
    Abstract: In order to reduce the bulk and weight of the upper igniter case division of the armor case, and to lower the center of gravity of the total apparatus so as to provide an igniter which is tough to oscillate, the igniter for the internal combustion engine has the armor case equipped with the coil department and igniter unit therein, and said armor case has the igniter case having the coil department case and the connector department. Furthermore, the coil department case is inserted in the plug hole of the internal combustion engine. The igniter unit is mounted in the igniter case. Furthermore, the igniter unit has a semiconductor device of a simple substance silicon chip having integrated therein a semi-conductor for switching and a current limiting circuitry. The semi-conductor for switching consists of an insulated bipolar transistor (IGBT) or a power transistor.
    Type: Grant
    Filed: February 24, 1999
    Date of Patent: May 2, 2000
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Hidetoshi Oishi, Noboru Sugiura, Kazutoshi Kobayashi, Hiroshi Watanabe, Katsuaki Fukatsu, Eiichiro Kondo, Yoichi Anzo, Masaru Ujigawa, Junichi Shimada, Kenji Nakabayashi
  • Patent number: 5970965
    Abstract: An inductive coil ignition system for an engine, having at least one ignition coil which includes a primary winding fed from a voltage source and having two terminals, and a secondary winding also having two terminals. A switching apparatus is arranged parallel to the primary winding and connects the two terminals of the primary winding as a function of a control signal. An activation circuit generates the control signal.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: October 26, 1999
    Assignee: Robert B osch GmbH
    Inventors: Ulrich Bentel, Helmut Schmied, Thomas Capouschek
  • Patent number: 5967128
    Abstract: According to the invention, a primary winding of an ignition coil is coupled with an insulated-gate bipolar transistor (IGBT). The IGBT is controlled by a current restriction circuit, which includes a control transistor for performing the on-off operation of the IGBT such that the IGBT is made conductive upon occurrence of an ignition control signal, and nonconductive, when a primary current of the ignition coil reaches a certain value depending on a reference voltage determined by a bias circuit. The bias circuit has a condenser, which is charged by a base current of the control transistor to change the base potential of the transistor slowly, when the transistor is made nonconductive.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: October 19, 1999
    Assignee: Hitachi, Ltd. & Hitachi Car Engineering Co.
    Inventors: Hiroshi Onuki, Takashi Ito, Katsuaki Fukatsu, Ryoichi Kobayashi, Noboru Sugiura
  • Patent number: 5915367
    Abstract: In order to reduce the bulk and weight of the upper igniter case division of an armor case, and to lower the center of gravity of the total apparatus so as to provide an igniter which is tough to oscillate, the igniter for the internal combustion engine has the armor case equipped with a coil compartment and igniter unit. The armor case has the igniter case having the coil case and connector. Furthermore, the coil compartment case is inserted in the plug hole of the internal combustion engine. The igniter unit is mounted in the igniter case. Furthermore, the igniter unit has a semiconductor device of a single substance silicon chip having integrated therein a semi-conductor for switching and a current limiting circuitry. The semi-conductor for switching consists of an insulated bipolar transistor (IGBT) or a power transistor.
    Type: Grant
    Filed: September 3, 1997
    Date of Patent: June 29, 1999
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Hidetoshi Oishi, Noboru Sugiura, Kazutoshi Kobayashi, Hiroshi Watanabe, Katsuaki Fukatsu, Eiichiro Kondo, Yoichi Anzo, Masaru Ujigawa, Junichi Shimada, Kenji Nakabayashi
  • Patent number: 5875749
    Abstract: An a.c. ignition system for an engine, with an ignition transistor that switches the primary winding of an ignition coil, with a control circuit for controlling the ignition transistor and a parallel circuit including a capacitor and a diode between the emitter and collector of the ignition transistor. The control circuit can receive a measuring signal that is proportional to the collector potential of the ignition transistor, and the control circuit controls the ignition transistor depending on the measuring signal so that the ignition transistor is activated at a low voltage between the collector and emitter of the transistor.
    Type: Grant
    Filed: November 4, 1997
    Date of Patent: March 2, 1999
    Assignee: Robert Bosch GmbH
    Inventors: Ulrich Bentel, Helmut Schmied, Thomas Capouschek
  • Patent number: 5775310
    Abstract: An igniter for an internal combustion engine includes a switching element performing flow and break control for a primary current flowing through an ignition coil depending upon a spark control signal output from an electronic engine control unit and a current limiting circuit limiting a current flowing through the switching element. The switching element is formed with an insulated gate bipolar transistor. The igniter further comprises a current detecting load element for detecting current flowing through the insulated gate bipolar transistor, and a diode being provided between the current detecting load element and the self-isolation N-MOS transistor, which diode having an opposite temperature coefficient to that of the current detecting load element.
    Type: Grant
    Filed: December 24, 1996
    Date of Patent: July 7, 1998
    Assignees: Hitachi, Ltd., Hitachi Car Engineering Co., Ltd.
    Inventors: Takahashi Ito, Katsuaki Fukatsu, Noboru Sugiura
  • Patent number: 5634453
    Abstract: An ignition apparatus for internal combustion engine includes an ignition power unit 1A having a power transistor 14A for feeding and shutting off a primary current i1 to and from an ignition coil 13 and a control circuit 2 having a CPU 21 for calculating an ignition timing of an internal combustion engine and a feeding time of the primary current in accordance with an operating state D and outputting an ignition signal G to the power transistor, feeds and shuts off the primary current in response to an ignition signal Ga to generate a high-tension secondary voltage from the ignition coil. The power transistor has a characteristic for increasing a direct current amplifying ratio as a base to emitter voltage VBE between a base and emitter increases to suppress the rising-up of the primary current to thereby suppress a secondary voltage generated when the primary current starts to be fed.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: June 3, 1997
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masaaki Taruya, Mitsuru Koiwa
  • Patent number: 5577485
    Abstract: A modular electronic ignition system for use in internal combustion engines is provided using latching Hall effect sensing devices. Two permanent magnets are affixed to a non-ferrous member mounted to the camshaft which extends through a seal in the timing cover. A sensing module comprising the Hall effect devices is arranged annularly or angularly about the magnet containing member and senses the magnetic field as the magnets pass the Hall effect devices. Dwell time is controlled by the angular distance at which the magnets are placed from each other. The output of the Hall effect devices drives application specific integrated circuits which provide low level switching of ignition coil primaries. The modular design allows for a low part count, a simplified EMI shielding arrangement, and easy removal and replacement of system components.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: November 26, 1996
    Assignee: International Machinery Corporation
    Inventor: Nathaniel L. Lindsley
  • Patent number: 5502338
    Abstract: A power transistor device is provided which has a function of clamping the collector voltage to a stable level for a wide range of temperature variations. In the power transistor device, a plurality of pn junctions are formed to fabricate Zener diodes in the polycrystalline silicon film in the form of rings. The ring configuration of the Zener diodes eliminates an end at the pn junction and prevents the junction surface from being exposed, making it possible to use as a stable Zener voltage the dielectric strength characteristic of the pn junction having a very small temperature coefficient.
    Type: Grant
    Filed: November 18, 1994
    Date of Patent: March 26, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Minoru Suda, Masatoshi Nakasu, Tetsuo Iijima
  • Patent number: 5397914
    Abstract: In a transistor where collector is connected to an inductive load and switching current flows, a Zener diode comprising structure of plural pn-junctions constituted in series form to a polysilicon is provided between collector and base. Further MOSFET is switch-controlled by control voltage formed based on Zener current flowing through the Zener diode, and current path in parallel form to the Zener diode is constituted. Since temperature characteristic coefficient of a Zener diode formed in a polysilicon film is very small, the reverse voltage generated in the inductive load can be set to stable voltage in spite of the temperature variation. Further the MOSFET is provided in parallel form, thereby relatively large ON-resistance value of the Zener diode can be decreased.
    Type: Grant
    Filed: April 27, 1993
    Date of Patent: March 14, 1995
    Assignee: Hitachi Ltd.
    Inventors: Minoru Suda, Masatoshi Nakasu, Tetsuo Iijima
  • Patent number: 5220903
    Abstract: An electronic ignition system having a control unit to preset the ignition times of the individual cylinders, an ignition coil, and an end stage with a switching transistor (T.sub.1) for exciting the ignition coil. The end stage is provided with a switching unit with which the sparking cycle of the spark plugs is influenced.
    Type: Grant
    Filed: October 28, 1991
    Date of Patent: June 22, 1993
    Assignee: TELEFUNKEN Electronic GmbH
    Inventor: Linhard Niemetz
  • Patent number: 5109827
    Abstract: An ignition apparatus for an internal combustion engine is provided which is simple in the circuit arrangement and highly reliable in operation. An electromagnetic pickup coil generates an ignition signal having a magnitude proportional to the number of revolutions per minute of the engine in synchrony with the rotation thereof for controlling an ignition coil. A waveform shaper in the form of a comparator shapes the ignition signal from the pickup coil into a signal containing a pulse having a rising edge and a falling edge. An integrator integrates the ignition signal from the pickup coil to provide a rpm voltage representative of the number of revolutions per minute of the engine. A signal level controller controls the voltage level of the ignition signal based on the rpm voltage generated by the integrator. A current absorber absorbs from the ignition signal a current in accordance with the voltage of a power supply which powers the ignition coil.
    Type: Grant
    Filed: April 8, 1991
    Date of Patent: May 5, 1992
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hisanori Nobe, Mitsuru Koiwa
  • Patent number: 5105794
    Abstract: An ignition system of the current interruption type for internal combustion engine wherein a three-pole magneto having a magnet positioned in a recess formed at a magnetic rotor is used as a power supply for the ignition system and a transistor switch circuit is used for interrupting a primary current of an ignition coil device is disclosed which is capable of significantly increasing an advance angle width. Pole arc angles .alpha. of a pair of stator magnetic poles are set to be equal to each other and an angular interval .alpha. between stator magnetic poles is set to be equal to or less than an angular interval .beta. between rotor magnetic poles adjacent to each other. Also, an angular interval .delta. between the outer ends of the stator magnetic poles is set to be larger than an angular interval .epsilon. between the first rotor magnetic pole and the third rotor magnetic pole.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: April 21, 1992
    Assignee: Kokusan Denki Co., Ltd.
    Inventor: Kenji Fukuda
  • Patent number: 5056481
    Abstract: To suppress negative half-waves derived from a magneto armature and not used for ignition without use of external damping networks, the semiconductor switch controlling current flow, and abrupt turn-off to initiate an ignition event, is formed as a monolithic semiconductor element, and the inherent inverse diode of the monolithic element is utilized to pass the reverse voltage half-waves. To prevent damage to the inherent diodes due to over-voltage or current overloading, a damping resistance element is connected in series with the main current carrying path of the monolithic circuit elements, preferably a Darlington transistor, which, preferably, is a semiconductor resistor having a preferred current passage characteristic in the same direction as the current flow through the Darlington transistor, for example a Zener diode, a resistor, or a series of diodes polarized like the inverse diode, bridged by a diode conducting in the same direction as the Darlington transistor, or the like.
    Type: Grant
    Filed: August 19, 1982
    Date of Patent: October 15, 1991
    Assignee: Robert Bosch GmbH
    Inventors: Jiri Podrapsky, Josef Orova
  • Patent number: 5003946
    Abstract: This disclosure relates to apparatus for operating a combustion engine by controlling the spark ignition voltage to said engine. Said control is created by the application of two opposing currents to the input of an amplifying device which is used to selectively shunt a constant current source away from the control electrode of a second amplifying device connected to control the formation of said ignition voltage.
    Type: Grant
    Filed: April 12, 1989
    Date of Patent: April 2, 1991
    Inventor: Floyd M. Minks
  • Patent number: 4993396
    Abstract: The present invention relates to a method for biasing and making conductive an insulated gate semiconductor device having main electrodes at both surfaces of a semiconductor substrate and a gate electrode at one surface. Charges are accumulated between the gate electrode and the main electrode at the opposite surface while a voltage is applied across the electrodes storing a charge. The element is made conductive by discharging the accumulated charges when a voltage is applied in the conductive direction to such semiconductor element. The device can be used to drive the primary side of an ignition system in an internal combustion engine.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: February 19, 1991
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Shunji Miura
  • Patent number: 4976247
    Abstract: The invention relates to an ignition device for combustion engines. The ignition device has a switching transistor (7) which, when a trigger is energized, is current-conductive, further an ignition coil (6), the primary winding (5) of which forms with the transistor (7) a series circuit, and, further, a signal transducer (10) connected in advance of the trigger (11) to supply a capacitor-charging current, after a lapse of a time period of its control signal (a, b) reaching a peak value. The threshold of the trigger (11) can be shifted relative to the control signal (a,b) by use of an electrical storage device (30) which can be charged and discharged, and in which the charge is dependent on the predetermined current value in the primary winding (5).
    Type: Grant
    Filed: May 11, 1990
    Date of Patent: December 11, 1990
    Assignee: Robert Bosch GmbH
    Inventors: Helmut Schmied, Bernd Kalkhof