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| Number | Title | Issue Date |
| 7372677 | Control apparatus for internal combustion engine-driven vehicle having power supply unit A control apparatus for an internal combustion engine-driven vehicle equipped with a power supply unit having an AC generator driven by an internal combustion engine, and a power converter which converts an output voltage from the AC generator into an AC voltage of ... | 05/13/2008 |
| 7355300 | Solid state turbine engine ignition exciter having elevated temperature operational capability A turbine engine ignition exciter circuit applies energy stored in the exciter tank capacitor to the load (igniter plug) through a thyristor type semiconductor switching device that minimizes leakage current at elevated operating temperatures. The semiconductor swit... | 04/08/2008 |
| 7327991 | Pulse modulation circuit Provided is a pulse modulation circuit that improves the on/off operation and improves the on/off ratio of an output power of the entire pulse modulation circuit in the switching operation. The pulse modulation circuit inputs a local oscillation wave and a DC pulse ... | 02/05/2008 |
| 7288929 | Inductive clamp for applying signal to buried utilities An inductive clamp includes a pair of jaws configured to surround a conductor, and a pair of handles, each connected to a corresponding jaw. A pivotal connection is provided that allows the jaws to close around a conductor. The jaws are optionally biased to hold the... | 10/30/2007 |
| 7269996 | Method for dynamic diagnosis of an exhaust gas analyzer probe A method for the dynamic diagnosis of an exhaust gas analyzer probe situated in an exhaust-gas system having at least one exhaust-gas catalytic converter, of an internal combustion engine, a measuring signal (lambda-actual) of the exhaust gas analyzer probe being co... | 09/18/2007 |
| 7251750 | Apparatus diagnostic device and diagnosed device An apparatus diagnostic device includes a communication unit that communicates with a diagnosed device through a communication line, and a control unit that controls to receive a problem generation notification from the diagnosed device via the communication unit, t... | 07/31/2007 |
| 7242195 | Integral spark detector in fitting which supports igniter in gas turbine engine A system for detecting spark in an igniter for a gas turbine engine. An igniter generates a plasma, or spark, somewhat similar to an automotive spark plug. In the invention, an inductive pick-up is positioned adjacent the igniter, to detect current pulses in the ign... | 07/10/2007 |
| 7210055 | Electronic control apparatus In an in-vehicle electronic control apparatus (ECU), when a microcomputer stops operation, a timer IC starts the count-up operation. When the count value reaches a preset value, a signal from the timer IC becomes high and a power supply voltage is outputted from a p... | 04/24/2007 |
| 7184906 | Systems and methods for performing multi-source measurements Systems and methods for performing multi-measurements are provided. One such method includes: displaying a first icon corresponding to a multi-source measurement, displaying waveforms, visually associating the first icon with at least one of the waveforms responsive... | 02/27/2007 |
| 7148698 | Fuse saving tester for fused circuit In one form, tester for an electrical system, such as for a vehicle, develops repetitively applied, short duration, control current pulses for reducing load current pulses through the electrical system. An operator connects a pair of input contacts across a fuse hol... | 12/12/2006 |
| 7142974 | Engine measuring equipment Engine measuring equipment for obtaining engine torque regarded as necessary for engine performance assessments for a short time period during a period when engine revolution is under a transient state is disclosed. The engine measuring equipment includes a central ... | 11/28/2006 |
| 7136780 | Abnormality diagnosis apparatus for automatic activation timer circuit An abnormality diagnosis apparatus for determining whether abnormality relating to execution of automatic activation has occurred in a timer circuit. An electronic control unit includes a microcomputer for storing a history of execution of automatic activation of a ... | 11/14/2006 |
| 7015698 | Sensor for detection of spark in igniter in gas turbine engine An igniter for a gas turbine engine. An igniter generates a plasma, or spark, somewhat similar to an automotive spark plug. In the invention, an inductive pick-up is used to detect current which produces the spark, the thereby infer the presence of spark. Further, t... | 03/21/2006 |
| 7002351 | Variable compensation circuit for capacitive adapters A variable compensation circuit for capacitive adapters is provided and includes an input connector for receiving a signal output from a capacitive adapter positioned within an electric near field emitted from a component of an engine ignition system, an output conn... | 02/21/2006 |
| 6977532 | Dual differential comparator circuit with full range of input swing The differential comparator circuit for receiving an input voltage within a pre-determined range, amplifying the input voltage, and outputting an output voltage is provided. The circuit includes: a first differential comparator for receiving the input voltage within... | 12/20/2005 |
| 6952655 | User defined processing function A method and apparatus for defining, configuring and performing a custom processing function in a digital oscilloscope. The custom processing function is programmed by the operator using a programming language. The custom function may be linked/chained with other pr... | 10/04/2005 |
| 6949941 | Manual tester for testing device and method thereof This present invention is about a manual tester for testing a device and method thereof. The manual tester includes a controller, a first display, and a second display. The controller transmits a testing signal to the device in response to a start voltage and obtain... | 09/27/2005 |
| 6873902 | Non-intrusive method of measuring engine operating parameters Methods and devices for measuring and calculating various kinds of parameters of a running engine are disclosed. A camera may be positioned to capture a plurality of images of a moving component that is being driven by the an engine. From the plurality of images, a ... | 03/29/2005 |
| 6861841 | Ignition waveform peak display A method and apparatus is provided that can accurately display the data from an ignition event. Data from a secondary waveform of the ignition event is collected and stored. The same data can be averaged and sent to a display buffer. A portion of the previously stor... | 03/01/2005 |
| 6844735 | Method for inspecting ignition device for internal combustion engine and inspection device An inspection object constructed of an ignition plug and an ignition coil is inserted in an inspection housing that does not have a ground electrode. A voltage generated in the ignition coil is measured while the inspection object is housed in the inspection housing... | 01/18/2005 |
| 6789518 | Method and system for identifying valve clearances and position of valve opening cams In a method and system, the condition of a valve drive, particularly of valve clearance, and the position of at least one valve opening cam of a cam shaft of an internal combustion engine are recorded from processing signals which are generated by at least one impac... | 09/14/2004 |
| 6617857 | DIS ignition signal processing for automotive engine analyzer An engine analyzer senses and displays secondary ignition signals from a DIS engine using a two sets of test leads. The engine analyzer receives the secondary signals from both sets of leads and produces positive and negative peak values for each set of l... | 09/09/2003 |
| 6531872 | Ignition-off timer diagnostic A method and an apparatus for diagnosing the Ignition-Off Timer of an internal combustion engine. This invention monitors the initial operation of the Ignition-Off Timer each time it is enabled in order to detect a variety of malfunctions. The malfunction... | 03/11/2003 |
| 6476611 | Circuit and a method for monitoring and diagnosing an oxygen probe A circuit for monitoring and diagnosing an oxygen probe provided with a sensitive cell connected between a first and a second signal terminal, and a heating member connected between a battery and a heating terminal; the circuit includes an interface stage... | 11/05/2002 |
| 6426626 | Apparatus and method for testing an ignition coil and spark plug A method and apparatus for testing spark plugs and ignition coils. An apparatus includes a power supply for supplying power to an ignition coil to generate a spark across a spark plug. A capture circuit captures an energy signal reflected from the ignitio... | 07/30/2002 |
| 6411096 | Scope analyzer for direct ignition engines An engine analyzer stores acquired cylinder waveform data in circular buffers respectively associated with the cylinders in accordance with cylinder selection by the user, with each buffer including a plurality of storage cells respectively storing data f... | 06/25/2002 |
| 6396278 | Hand-held ignition voltage tester A hand-held ignition voltage tester for detecting voltage on a spark plug wire in an ignition system, such as a distributorless ignition system. The tester includes a housing, positive and negative power cables and a capacitive probe for capacitively coup... | 05/28/2002 |
| 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 |
| 6018245 | Method and apparatus for detection and acquisition of automotive fuel injector voltage signal pulse width A method and apparatus for detecting and displaying automotive fuel injector voltage signal pulse width which includes signal detection circuits for capturing the rising and falling edges of an input signal having positive and negative voltage swings is d... | 01/25/2000 |
| 5941926 | Engine analyzer with cylinder triggering of oscilloscope display having fixed-time sweep An engine analyzer has an oscilloscope screen display operable with a fixed-time sweep. The analyzer includes a data acquisition system for digitizing analog input waveforms and a memory for storing the digitized waveform data, the analyzer including sens... | 08/24/1999 |
| 5933009 | Spark plug ignited engine analyzing device and method An engine analyzing device for an internal combustion engine including a spark generator and means for testing the voltage of the sparks generated for a diagnosis of engine performance, the testing of the sparks generated relating to analysis of the spark... | 08/03/1999 |
| 5923161 | Graphical display device A measuring device displays waveforms representative of electrical signals and includes a selector, at least one input terminal, and a graphical display. The graphical display is suitable to view a waveform thereon. The measuring device receives an electr... | 07/13/1999 |
| 5898307 | Independent cursor control in dual-trace engine analyzer scope An engine analyzer having a dual-trace digital oscilloscope display provides a discrete waveform plot area for each trace and displays in each plot area a cursor array which may selectively include one or two vertical-line cursors which can be selectively... | 04/27/1999 |
| 5852789 | Engine analyzer with pattern library linked to vehicle ID and display scope configuration An engine analyzer having a dual-trace digital oscilloscope includes a memory for storing a library of digitized waveform patterns, the patterns being stored together with identifying data for each pattern and lists of groups of patterns respectively corr... | 12/22/1998 |
| 5834939 | Hand-held ignition voltage tester A hand-held ignition voltage tester for detecting voltage on a spark plug wire in an ignition system, such as a distributorless ignition system. The tester includes a housing, positive and negative power cables and a capacitive probe for capacitively coup... | 11/10/1998 |
| 5804970 | Method and apparatus for detection and acquisition of automotive fuel injector voltage signal pulse width A method and apparatus for detecting and displaying automotive fuel injector voltage signal pulse width which includes signal detection circuits for capturing the rising and falling edges of an input signal having positive and negative voltage swings is d... | 09/08/1998 |
| 5784284 | Technique for plotting a variable-width signal in a fixed-width plot area A data acquisition device permits plotting of cylinder firing cycles, of varying-frequency, on a fixed-plot area of a CRT screen. Each cylinder firing cycle is sampled, at a constant sample rate, and consecutive sets of sample points, each containing a fi... | 07/21/1998 |
| 5778328 | Engine analyzer with single-head ignition scope An engine analyzer with a digital oscilloscope display includes a processor for controlling the acquisition and display of a high-voltage secondary ignition signal waveform with the use of only a single high-voltage reactive pickup probe, the waveform bei... | 07/07/1998 |
| 5742276 | Engine analyzer with dual-trace scope and selective control of synchronization of the scope traces An engine analyzer has a dual-trace display screen, a waveform acquisition means for obtaining analog waveforms from an associated engine and digitizing them, a memory for storing digitized waveform data and a processor for controlling the operation of th... | 04/21/1998 |
| 5719765 | Real-time scrolling drive-trace display for a vehicle engine analyzer A method and apparatus for generating a horizontally-magnified, scrolling drive-trace line on a graphical display screen of an engine analyzer aids a technician in controlling a vehicle's speed over a fixed driving period of successive driving time interv... | 02/17/1998 |
