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| Number | Title | Issue Date |
| 7688073 | Diagnosis device of capacitor discharge ignition device for engine A diagnosis device of a capacitor discharge ignition device for an engine that detects, as a singularity, a leading edge or a trailing edge of a voltage between output terminals of an ignition power supply portion that generates a voltage for charging an ignition ca... | 03/30/2010 |
| 7251571 | Methods of diagnosing open-secondary winding of an ignition coil using the ionization current signal In a first embodiment, the present invention is a method of detecting an open secondary winding, including the steps of enabling an integrator, resetting the integrator, detecting an ionization current, integrating the ionization current over a spark window, compari... | 07/31/2007 |
| 7159583 | Technique for drive current stabilization of an automotive ignition system Drive current stabilization is achieved through the management of a drive current. The drive current may include a control current that is provided to a control terminal of a switch, a current limit input current that is provided to a current limit circuit associate... | 01/09/2007 |
| 7095181 | Method and apparatus for controllably generating sparks in an ignition system or the like 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 ... | 08/22/2006 |
| 7063079 | Device for reducing the part count and package size of an in-cylinder ionization detection system by integrating the ionization detection circuit and ignition coil driver into a single package Two embodiments of an integrated ionization detection circuit and ignition coil driver, an ASIC and a single electronic package, are disclosed. The apparatuses reduce the cost and complexity of an in-cylinder ionization detection system by combining like functionali... | 06/20/2006 |
| 7038459 | Oil deterioration detection apparatus An oil deterioration detection apparatus includes a sensor, an evaluation circuit, and a malfunction detecting circuit. The evaluation circuit has a determination circuit. The malfunction detecting circuit has a resistor and a switch. The evaluation circuit evaluate... | 05/02/2006 |
| 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 |
| 6948484 | Capacitor discharge ignition device A capacitor discharge ignition device is provided with a capacitor for storing charge to produce ignition energy; ignition coils that receive charge released from the capacitor on the primary side and generate a high voltage on the secondary side; a switching elemen... | 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 |
| 6909285 | Method for detecting failure of a relay A method for detecting failure of a relay operating in a vehicle having an ignition switch, a power supply, a capacitor, and a pre-charge circuit to pre-charge the capacitor with the relay switching power from the power supply to the pre-charged capacitor, the metho... | 06/21/2005 |
| 6883509 | Ignition coil with integrated coil driver and ionization detection circuitry Internal combustion engine (ICE) on-plug ignition coils with transistor drivers located in powertrain control modules (PCM) or other remote locations are prone to high electrical and magnetic interference (EMI) emissions and are subject to interference from other co... | 04/26/2005 |
| 6803765 | Misfire detection system for internal combustion engines In a system for detecting misfire for an internal combustion engine wherein ionization current that flows following the discharge current is detected and integrated during a period (gate) and occurrence of misfire of the engine is detected based on the integrated va... | 10/12/2004 |
| 6667622 | Vehicle engine pulse stream analyzer A low cost, easy to use, hand held pulse stream analyzer is designed to show, after an engine stops operating, which pulse stream, ignition or injection, quit first. Additionally, the analyzer is capable, using relative time domain analysis to comparative... | 12/23/2003 |
| 6600322 | Stroke distinction in 4-cycle engines without a cam reference Methods, apparatus, and systems for distinguishing between compression and exhaust strokes of a four-cycle engine is provided. A first ionization time of a spark plug for a known cylinder is measured on a first engine stoke. A second ionization time of th... | 07/29/2003 |
| 6492818 | Apparatus and method for determining component fault conditions as a function of primary coil voltage in a capacitive discharge ignition system An apparatus for determining component fault conditions associated with a capacitive discharge ignition system for an internal combustion engine includes a number of AC coupling circuits connected to a spark detection circuit, wherein the combination is r... | 12/10/2002 |
| 6388445 | Capacitor discharge engine ignition system with automatic ignition advance/retard timing control A capacitor discharge engine ignition system that includes an ignition coil having a primary winding and a secondary winding for coupling to an engine ignition spark plug. A first electronic switch has primary current conducting electrodes in circuit with... | 05/14/2002 |
| 6384606 | Ignition coil with lead for secondary diagnostics An ignition coil with an isolated internal lead in proximity to the secondary side can be used in a capacitive discharge ignition system with a microprocessor-based signal-processing module to monitor system performance. The diagnostic lead is fed into a ... | 05/07/2002 |
| 6029640 | Method of detecting an ionization current A method for generation of a low test voltage is used for the purpose of detecting an ionization current in the spark gap of an internal combustion engine. The voltage is generated by a controllable ignition magneto (5) arranged in order to charge (2) an ... | 02/29/2000 |
| 5824889 | Capacitive oil deterioration and contamination sensor An oil deterioration and contamination sensor includes a housing, a substrate with a first capacitive plate mounted within the housing, a second capacitive plate mounted to the housing close to the first capacitive plate, and a total reference capacitor w... | 10/20/1998 |
| 5777216 | Ignition system with ionization detection Provided is a high power ignition system for internal combustion engines with a detection circuit for sensing and measuring ionization in a spark plug gap. The detection circuit utilizes a dual-purpose second energy source to apply the voltage necessary t... | 07/07/1998 |
| 5668311 | Cylinder compression detection A compression detection apparatus for determining which one of a pair of phase-opposed cylinders is under compression has a capacitive probe coupled to both ends of the secondary winding of an ignition coil servicing both spark plugs of the pair of cylind... | 09/16/1997 |
| 5623209 | Diagnostic system for capacitive discharge ignition system In a capacitive discharge ignition system there being a first circuit detecting the voltage across the storage capacitor marking the onset of discharge of the storage capacitor, a second circuit detecting the voltage across the storage capacitor marking t... | 04/22/1997 |
| 5572135 | Diagnostic apparatus and methods for ignition circuits Diagnostics apparatus for detecting operation of an exciter circuit connected to an igniter, includes means for detecting current discharged from the exciter circuit through the igniter, means for detecting current discharged from the exciter circuit othe... | 11/05/1996 |
| 4758790 | Engine analysers for capacitor discharge ignition systems An adaptor for use in conjunction with an internal combustion engine having a capacitor discharge ignition system provides a substitute high voltage pulse coincident with the high tension pulse of the engine ignition system but having a period which is su... | 07/19/1988 |
| 4463315 | CD power pack tester Disclosed herein is a CD power pack tester adapted for connection to an AC line and to a CD power pack, the CD power pack including a rectifier circuit connected to a charge capacitor and an ignition SCR which allows the charge capacitor to discharge thro... | 07/31/1984 |
| 4000456 | Engine diagnostic apparatus Engine diagnostic apparatus for displaying on a cathode ray tube the voltage conditions existing at each of the spark plugs which apparatus is intended for use with ignition systems in which the voltage pulses applied to the spark plugs are of such short ... | 12/28/1976 |
