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| Number | Title | Issue Date |
| 7245471 | Discharge device for inductive devices A method and apparatus for protecting an energized inductive device such as an electromagnet from an open circuit, i.e., the loss of the power source for the inductive device. A diode is connected across terminals of the inductive device such that when the inductive... | 07/17/2007 |
| 7080639 | Soft IGBT turn-on ignition applications 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 ... | 07/25/2006 |
| 7066161 | Capacitive discharge ignition system 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 ... | 06/27/2006 |
| 6112730 | Ignition system with clamping circuit for use in an internal combustion engine An ignition system for an internal combustion engine having a transformer with a primary winding adapted to be connected to a power supply and a secondary winding adapted to be connected to a spark plug of the internal combustion engine, and a controller ... | 09/05/2000 |
| 6070568 | Ignition circuits The invention describes a novel circuit to be used in spark-ignition combustion engines. An ignition circuit according to the invention extends the voltage decay time following the initial generation of a spark across the spark plug gap. In addition, it r... | 06/06/2000 |
| 6006156 | Apparatus and method for diagnosing and controlling an ignition system of an internal combustion engine An apparatus for diagnosing and controlling an ignition system of an internal combustion engine includes an ignition coil controllable by an ignition control circuit, a spark voltage sensor electrically connected to the high tension side of the ignition c... | 12/21/1999 |
| 5564403 | Spark ignition system and spark plug for ultra lean fuel/air mixtures A spark ignition system and spark plug for utilization in an internal combustion engine combusting an ultra lean fuel/air mixture has capacitors and rectifiers built within the spark plug and the system is constructed to be compact and capable of deliveri... | 10/15/1996 |
| 5421312 | Electrical circuit An electrical circuit for connection to a high tension lead which is connected to a spark plug of a spark ignition internal cumbustion engine. The circuit comprises a capacitor (11) the capacitance of which is such that, if a high voltage pulse is applied... | 06/06/1995 |
| 5370100 | Connecting part for ignition device A connection part for an ignition device, arranged between an ignition coil and a spark plug for incorporating in a cylinder head of an internal combustion engine, has an isolation housing, a high voltage switching element located in the isolation housing... | 12/06/1994 |
| 4487177 | Apparatus and method for starting a diesel engine using plasma ignition plugs A diesel engine is started by plural ignition plugs, each installed in a swirl chamber of a corresponding cylinder. Each ignition plug includes (a) an elongated center electrode, (b) a fuel-absorbent electrical insulator that encapsulates the center elect... | 12/11/1984 |
| 4463744 | Distributorless ignition system with surge absorbing means and apparatus therefor A distributorless ignition system in which a primary current alternately changing in its flowing direction is supplied to the primary winding of an ignition coil to induce a high secondary voltage alternately changing in polarity across the secondary wind... | 08/07/1984 |
| 4418660 | Plasma ignition system using photothyristors for internal combustion engine A plasma ignition system for an internal combustion engine, which comprises: (a) a low DC voltage power supply; (b) a DC-DC converter which converts a low DC voltage from the low DC voltage supply to the corresponding AC voltage and inverts the AC voltage... | 12/06/1983 |
| 4369758 | Plasma ignition system A plasma ignition system for an internal combustion engine which can prevent irregular ignition when the insulation between the electrodes of the spark plug deteriorates due to carbon on the electrodes, and further can prevent electrical noise from being ... | 01/25/1983 |
| 4366801 | Plasma ignition system A plasma ignition system for an internal combustion engine which can prevent irregular ignition when the insulation between the electrodes of the spark plug deteriorates due to carbon on the electrodes, and further can prevent electrical noise from being ... | 01/04/1983 |
| 4292569 | High energy modulation ignition system An ignition system uses a transformer with a primary winding and a secondary winding wherein the secondary winding is intermittently coupled to at least one igniter load. An electronic switch is connected to the primary winding. Such electronic switch has... | 09/29/1981 |
| 4291661 | Inductive-capacitive modulated ignition system An inductive-capacitive cyclic charge-discharge ignition system includes an ignition transformer primary winding in parallel with a capacitor and fed by a unipolar alternating current source providing a plural number of repetition cycles during each ignit... | 09/29/1981 |
| 4274034 | Glow plug driver A glow plug driver adapted to be coupled to a power supply and a glow plug comprising first and second conductive leads for coupling the glow plug to the power supply and an electronic switch in the first lead having conductive and nonconductive states so... | 06/16/1981 |
| 4245609 | Modulated AC ignition system An ignition system includes an alternating current power source which feeds a transformer having a primary winding, the primary winding being coupled to an electronic switch. The electronic switch intermittently interrupts current flowing in the primary w... | 01/20/1981 |
| 4217873 | Ignition circuit for self-purifying creeping discharge spark plugs An ignition circuit for self-purifying creeping discharge spark plugs is disclosed. The ignition circuit comprises a creeping discharge spark plug including a center electrode and a concentric ground electrode between which is formed a spark gap having a ... | 08/19/1980 |
| 4206737 | Modulated ignition system An AC powered ignition system employs a rectangular wave power source and a logic circuit for controlling igniter firing. Such logic circuit intermittently interrupts the flow of DC bias current in active stages of the AC power source and activates an ele... | 06/10/1980 |
| 4206736 | High power AC ignition system An ignition system includes an alternating current power source which feeds a transformer having a primary winding, the primary winding being coupled to an electronic switch. The electronic switch intermittently interrupts current flowing in the primary w... | 06/10/1980 |
| 4204490 | Over-rotation prevention method and circuit in the non-contact type ignition circuit for the internal combustion engine In a non contact ignition circuit for an internal combustion engine, a current induced in the primary winding or an ignition coil is controlled and cut-off by operation, on and off, of a thyristor so as to produce a discharge in a spark plug. A capacitor ... | 05/27/1980 |
| 4169445 | Transient intermodulation ignition system A transient modulation ignition system is provided having a transformer with a primary winding and a secondary winding. A timer is utilized for intermittently providing ignition timing to the system. A non-DC power source is also provided the output of wh... | 10/02/1979 |
| 4144476 | Multiple double energy modulation ignition system Energy provided by two circuits each of which has inductive and capacitive components which provide initial conditions for the ignition firing cycle, makes possible high modulated power components of the system for delivery to a high voltage distributor. ... | 03/13/1979 |
| 4136301 | Spark plug igniter comprising a DC-DC converter A spark plug igniter with an auxiliary power source, in which the auxiliary power source is a DC-DC converter including a feedback loop. A high voltage induced in a secondary winding of an ignition coil and a DC voltage generated by the converter are addi... | 01/23/1979 |
| 3934570 | Ferroresonant capacitor discharge ignition system Capacitor discharge ignition system for a spark-ignition internal combustion engine. The ignition system employs an ignition coil having primary and secondary windings wound on a ferromagnetic core, preferably made of a ferrite material. A first capacitor... | 01/27/1976 |
