Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 7740009 | Spark control for improved engine operation A system for controlling spark of an engine is disclosed. In one embodiment, a number of sparks produced by a spark plug is varied. The system may improve engine operation, at least during some conditions. ... | 06/22/2010 |
| 7404396 | Multiple discharge ignition control apparatus and method for internal combustion engines In a multiple discharge ignition control apparatus, a battery, an energy storage coil and a first IGBT are connected in series. Further, the energy storage coil, a diode, a primary coil and a second IGBT are connected in series. The energy storage coil is connected ... | 07/29/2008 |
| 7400965 | Ignition control process A process is provided for ignition control in a cylinder of an internal combustion engine, using an ignition coil which has a connected primary winding and a secondary winding which is connected to a spark plug, and an ignition control unit which is used to control ... | 07/15/2008 |
| 7392798 | Multiple-spark ignition system for internal combustion engine An ignition system for an internal combustion engine includes an ignition coil, electric power supply circuit, a switching transistor, engine condition detecting element or unit that detects a signal relating to flow speed of air-fuel-mixture gas in the engine, and ... | 07/01/2008 |
| 7353813 | Spark ignition engine, controller for use in the engine, ignition coil for use in the engine An engine generating two or more ignition sparks by the same spark plug, which can avoid a torque reduction caused by misfire of main ignition, can start firing and burning at proper timing depending on operating conditions, and can reduce misfires. A novel controll... | 04/08/2008 |
| 7255080 | Spark plug heating for a spark ignited engine A system for an engine of a vehicle, comprising of at least one combustion chamber located in the engine, a delivery system configured to deliver a fuel and a fluid to the combustion chamber, an ignition system including a spark plug configured to ignite the fuel wi... | 08/14/2007 |
| 7215528 | Turn-on coil driver for eliminating secondary diode in coil-per-plug ignition coils A circuit for controlling an ignition coil that attenuates the feed forward voltage by slowing the initial turn-on of the coil driver is disclosed. The turn-on circuit includes a control signal input node, a capacitor, a resistor, a diode, and a coil driver. The con... | 05/08/2007 |
| 7165542 | High energy ignition method and system using pre-dwell control A system and method of managing the energy stored in a single ignition coil of a distributor inductive ignition for an engine. The engine comprises a plurality of cylinders and the ignition coil has a primary coil current. The ignition coil has a stored energy and a... | 01/23/2007 |
| 7156075 | Ignition method with stop switch for internal-combustion engines 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 inform... | 01/02/2007 |
| 7137385 | Device to provide a regulated power supply for in-cylinder ionization detection by using the ignition coli fly back energy and two-stage regulation This feature of the present invention comprises a method and apparatus that provides a regulated power supply for in-cylinder ionization detection by harvesting the excess ignition coil leakage and magnetizing energy immediately following the turn off of the ignitio... | 11/21/2006 |
| 7134423 | Ignition diagnosis and combustion feedback control system using an ionization signal This feature of the present invention comprises an ignition diagnostics and feedback control system based upon detected ionization current in an individual cylinder. The system is divided into two subsystems: an ignition diagnostics subsystem and an ignition feedbac... | 11/14/2006 |
| 7013845 | Emissions reduction system for an internal combustion engine A dual system for overall engine emissions control, including prevention of excessive formation of nitrogen oxides and carbon compounds 1) by cooling and humidifying intake air and 2) by restructuring and modifying hydrocarbon fuels, resulting in a more complete com... | 03/21/2006 |
| 7005855 | Device to provide a regulated power supply for in-cylinder ionization detection by using the ignition coil fly back energy and two-stage regulation The present invention is directed to a dual charge rate power supply circuit and method for ionization detection. The circuit includes a first diode, first and second capacitors, and first and second current paths. The first diode includes an anode operably connecte... | 02/28/2006 |
| 6948474 | Cylinder direct injection type internal combustion engine An internal combustion engine which injects fuel directly into a cylinder 104 and ignites air-fuel mixture formed in the cylinder, wherein each fuel injection of said internal combustion engine comprises a lead spray 105 which moves faster and a... | 09/27/2005 |
| 6922057 | Device to provide a regulated power supply for in-cylinder ionization detection by using a charge pump A charge pump is used to supply current to the ionization detection circuit. To detect in-cylinder ions generated during the combustion process, a DC bias voltage needs to be applied. There are two ways to generate the DC bias: conventional DC power supply (large el... | 07/26/2005 |
| 6814047 | Method of ignition and corresponding ignition unit The present invention provides an ignition method for an internal combustion engine, an injection being alternatively performed in at least one first operating mode or in a second operating mode, and the ignition coil being charged as a function of the current opera... | 11/09/2004 |
| 6763806 | Combustion control apparatus and combustion control method of internal combustion engine A combustion state during the initial stage after ignition is detected, and based on the detected combustion state, it is judged whether or not incomplete combustion has occurred, and when it is judged that incomplete combustion has occurred, an ignition signal is o... | 07/20/2004 |
| 6725834 | Ignition system with ion current detecting circuit An ignition system has an ignition circuit and an ion current detecting circuit. The ignition circuit has an ignition coil that has relatively low inductance of about less than 10 henries (H) because it is used in conjunction with a separate energy accumulating coil... | 04/27/2004 |
| 6694959 | Ignition and injection control system for internal combustion engine During a multiple discharges operation, a micro computer changes a discharge period of each discharge in accordance with a pressure transition in a combustion chamber of an internal combustion engine. Thus, the energy amount consumed at each discharge of ... | 02/24/2004 |
| 6684866 | Ignition system for an internal combustion engine An ignition system is for an internal combustion engine having an ignition device that requires a high voltage (ignition voltage) for igniting the ignition spark. Two ignition coils are provided, which have secondary windings that are each connected to el... | 02/03/2004 |
| 6666195 | Method for producing a sequence of high-voltage ignition sparks and high-voltage ignition device A method of generating a sequence of high-voltage ignition sparks is described, wherein an ignition energy storage device is charged up to a specifiable charge state. By a discharge of the ignition energy storage device, a spark is generated on an ignitio... | 12/23/2003 |
| 6378513 | Multicharge ignition system having secondary current feedback to trigger start of recharge event An ignition system for an internal combustion engine includes an ignition coil coupled to a spark plug in a combustion chamber of the engine, and a switch responsive to an ignition control signal for causing a primary current to flow through a primary win... | 04/30/2002 |
| 6289868 | Plasma ignition for direct injected internal combustion engines An apparatus and method for the creation, placement and control of an area of electrical ionization within an internal combustion engine combustion chamber. This area of electrical ionization is positioned so that all of the fuel being injected into the c... | 09/18/2001 |
| 6283104 | Ignition system for internal combustion engine A current on the primary side of an ignition coil is subjected to repeated conduction/cutoff control in accordance with an ignition control signal of an ECU to thereby generate a high voltage for ignition twice or more in one combustion stroke. In such a ... | 09/04/2001 |
| 6186130 | Multicharge implementation to maximize rate of energy delivery to a spark plug gap An ignition control system for an internal combustion engine includes a control circuit, an ignition coil, a switch, and a sensing circuit. The control circuit is configured to interrupt a primary current, thereby establishing a secondary current which is... | 02/13/2001 |
| 6131555 | System for controlling ignition energy of an internal combustion engine A system for controlling ignition energy of an internal combustion engine includes an ignition coil having a primary coil and a secondary coil coupled to first and second electrodes of an ignition plug defining a spark gap therebetween, wherein the primar... | 10/17/2000 |
| 6115665 | Memory efficient computer system and method for controlling an automotive ignition system In an automotive ignition system having ignition coil banks with at least one ignition coil for energizing a corresponding spark plug, input/output (I/O) devices are provided in electrical communication with the ignition coil banks for relaying ignition c... | 09/05/2000 |
| 6032657 | Multi spark ignition system An ignition system for internal combustion engines with spark ignition comprising an ignition coil, a spark plug connected to the secondary winding, an electric supply circuit associated with the primary winding of the coil, where the said circuit include... | 03/07/2000 |
| 5947093 | Hybrid ignition with stress-balanced coils An improved high energy high efficiency hybrid capacitive/inductive ignition system with one or coils Ti for internal combustion engines employing one or more energy storage capacitor means (4) shunted by diode means (9), with high leakage inductor means ... | 09/07/1999 |
| 5886476 | Method and apparatus for producing electrical discharges A dual primary, single secondary ignition coil and control provides for establishment of a continuous extended arc across a pair of electrodes or dual arcs across the pair of electrodes. Continuous extended arcs are advantageous in extended burn applicati... | 03/23/1999 |
| 5818120 | Circuit for limiting an overvoltage on a control switch connected in series with an inductive load An overvoltage limiting circuit having first and second terminals to produce a temperature-stable voltage proportional to an overvoltage condition. The overvoltage limiting circuit includes a first transistor having a first terminal connected to the first... | 10/06/1998 |
| 5724938 | Ignition system for a two cycle engine The present invention relates to ignition systems for internal combustion engines and, in particular, to a spark ignition system specifically adapted for two-cycle engines. An ignition system is provided which is able to avoid ignition plug smolder and el... | 03/10/1998 |
| 5713338 | Redundant ignition system for internal combustion engine A redundant ignition system for an internal combustion engine is provided. When the internal combustion system is a waste spark system, opposite ends of first and second secondary windings of first and second coils, are coupled, respectively, to first and... | 02/03/1998 |
| 5711283 | System for combusting fuel An internal combustion engine system including an engine, timer/distributor device and a compliant electromagnetic device is disclosed. The engine may have one or more cylinders and includes an anode positioned above a cathodic piston whereby the anode de... | 01/27/1998 |
| 5694908 | Auxiliary water-supply sytem for an internal combustion engine An improved auxiliary water-supply device for use with an internal combustion engine system is disclosed. It contains :(a) a water storage device; (b) a water level sensing device for sensing the water level of the water storage device, an engine temperat... | 12/09/1997 |
| 5638799 | Double strike ignition control Ignition drive circuitry for generating sequential first and second arcs across electrodes of spark plugs in internal combustion engine cylinders for contributing supplemental combustion energy and for enabling simple, robust misfire detection with a firs... | 06/17/1997 |
| 5636620 | Self diagnosing ignition control A self-diagnosing ignition drive circuit for applying a first ignition drive signal to a spark plug in an internal combustion engine cylinder for generating an arc across the electrodes thereof to ignite an air/fuel mixture in the cylinder and, following ... | 06/10/1997 |
| 5513612 | Multiple combustion ignition timing system The ignition system of the present invention includes electrical circuitry for firing two or more sparks during the power stroke of the engine. The sparks are fired at precise preselected degree positions of the piston, and the degree positions of the spa... | 05/07/1996 |
| 5503133 | Internal combustion engine An internal combustion engine system including an engine, timer/distributor device and a compliant electromagnetic device is disclosed. The engine may have one or more cylinders and includes an anode positioned above a cathodic piston whereby the anode de... | 04/02/1996 |
| 5476084 | Energy-on-demand ignition coil An energy-on-demand vehicular ignition system with a programmable re-striking and minimum single-strike energy output whereby at idle engine speed and lowest load, each coil will be re-struck or discharged the maximum number of times permitted by the coil... | 12/19/1995 |
