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| Number | Title | Issue Date |
| 7368758 | Method for hermetically housing optical components, and optical components produced according to said method A method is provided for producing a housing body for optoelectronic components that are reliable and inexpensive. The method creates a hermetic joint between a metal sleeve and a glass pane by joining together a housing element and a preferably metallic housing arr... | 05/06/2008 |
| 7331414 | Protective structure for an electrical circuit device A protective structure for an electrical circuit device attached to a vehicle includes a resin case, an electrical circuit, and a rigid body. The electrical circuit is contained in the resin case. The rigid body is contained in the resin case. The rigid body protrud... | 02/19/2008 |
| 7268655 | Ignition coil with secondary winding center tap connected to shield A distributorless ignition coil has two high voltage secondary windings wound around a primary winding, with each secondary winding being electrically connected to a respective spark plug. A shield surrounds the secondary windings. The secondary windings share a com... | 09/11/2007 |
| 7222607 | DSP-based engine knock detection including knock sensor and circuit diagnostics A knock detection system for a spark-ignition engine includes a knock sensor that is responsive to vibration of the engine and that generates a knock signal. A first module calculates a knock energy based on the knock signal and a second module calculates a knock in... | 05/29/2007 |
| 7188477 | High temperature dynamic seal for scramjet variable geometry A seal assembly for use in an engine, such as a scramjet engine, having a movable element, such as inlet cowl flap, is provided. The movable element has an outboard structural member which requires thermal protection. The seal assembly includes a sealing element and... | 03/13/2007 |
| 7185893 | Metallic flat seal and method for the production thereof The present invention concerns a metallic flat gasket with at least one sealing layer with at least one port, with a sensor layer corresponding to the ports being deposited on at least one surface of the sealing layer. This sensor layer consists of a compression pro... | 03/06/2007 |
| 7178383 | Knock sensor A stacked body constituted by a first insulating sheet, a first terminal plate, a piezoelectric element, a second terminal plate, a second insulating sheet, a weight, and a disk spring is fitted over a cylindrical portion of a base, clamped and held between a nut an... | 02/20/2007 |
| 7107819 | Pressure sensor unit having a ring-like pressure sensing element According to the present invention, there is provided a pressure sensor unit (1) having a ring-like pressure sensing element (3), which is formed separately from a spark plug, in the state where a spark plug (100) has been attached a rear end of... | 09/19/2006 |
| 7100426 | Knocking sensor A knocking sensor comprises: a cylindrical body including a cylindrical portion and a supporting flange provided at an outer circumference of a lower end of the cylindrical portion; parts including an insulating member, an electrode plate and an annular piezoelectri... | 09/05/2006 |
| 7051575 | Control device for internal combustion engine A control device for an internal combustion engine comprising: a knocking sensor for detecting a knocking signal of the internal combustion engine; a band pass filter for extracting a knocking signal of a predetermined frequency band from the output signal of the kn... | 05/30/2006 |
| 7022968 | Optical sensor that measures the light output by the combustion chamber of an internal combustion engine An optical sensor provides information about the burn of the fuel mixture in the combustion chamber of an internal combustion engine as well as the timing and waveform of the spark that ignites the fuel mixture in the combustion chamber. The optical sensor can be im... | 04/04/2006 |
| 7021275 | Igniter for internal combustion engines operating over a wide range of air fuel ratios An igniter for ignition over a wide air/fuel ratio range. Igniter includes an igniter body including an internal cavity disposed substantially within the igniter body, an internal spark gap disposed substantially within the internal cavity, an external spark gap dis... | 04/04/2006 |
| 7016274 | Optical pickup system with light receiving portion An optical pickup comprises a light source, a three-way split light diffracting section for dividing light emitted from a light source into one main beam and two subbeams, a hologram for dividing each of the main beam and the subbeams reflected from a recording medi... | 03/21/2006 |
| 7007547 | Optical sensor or emitter used for monitoring combustion processes An optical sensor or emitter (1) used for monitoring combustion processes in a combustion chamber is provided with an optical element (2) on a side facing the combustion chamber and an optical fiber or fiber bundle (3) on a side opposite the com... | 03/07/2006 |
| 7004009 | Knocking sensor for internal combustion engine and manufacturing method of the same There is provided a knocking sensor for an internal combustion engine improved so that electrical damage of a terminal plate in an annular combination member is more certainly prevented. Only two communicating passages separate from each other by substantially 180 d... | 02/28/2006 |
| 6990384 | Truss plate detector A truss plate detector preferably includes a first sensor array and a second sensor array. The first sensor array includes a plurality of sensors arranged to detect truss plates on a first side of a truss. A second sensor array preferably includes a plurality of sen... | 01/24/2006 |
| 6975256 | Adjustable gain precision full wave rectifier with reduced error A circuit is provided for rectifying and amplifying an AC input waveform to optimize the dynamic range of downstream circuitry, such as an analog-to-digital converter. The circuitry includes an inverting amplifier and a non-inverting amplifier. The inverting amplifi... | 12/13/2005 |
| 6923041 | Non-resonance type knock sensor A non-resonance type knock sensor is provided which comprises a support member having a main body portion in the form of a hollow post and a radially outward flange portion at an axial end of the main body portion, the main body portion having an abutment at an oute... | 08/02/2005 |
| 6799451 | Spark generating apparatus having strain gage cylinder pressure measurement feature An ignition coil, spark plug, and pressure sensor for an internal combustion engine are, in a preferred embodiment, integrated into a single assembly and mounted directly on a plug hole of an internal combustion engine. A hard spark plug shell serves as a pressure m... | 10/05/2004 |
| 6779381 | Threadless knock sensor A threadless knock sensor (10, 50) includes a sleeve (12, 52) around which a transducer (24, 64) and a load washer (30, 70) are disposed. A frusto-conical disk spring (34, 78) is installed in compression around the sleeve (12, 5... | 08/24/2004 |
| 6421625 | Method for checking analog sensors After the start of an internal combustion engine, a check is made to see whether a positive change in a measurement signal is established. A positive change is established if the measurement signal lies below a predetermined threshold value when the inter... | 07/16/2002 |
| 6212944 | Apparatus and method for monitoring engine conditions, using magnetostrictive sensors A method and apparatus is provided for the sensing, collection, and analysis of information on combustive and mechanical events occurring within an operating internal combustion engine through the measurement of mechanical stress waves present within the ... | 04/10/2001 |
| 6131465 | Fiber optic combustion pressure sensors for engine knock and misfire detection Spark plug (20) integrated fiber optic combustion pressure sensors (30, 36) are configured to decrease heat and fatigue damage to the critical diaphragm (40) and fiber tip (37). A cup-shaped diaphragm (40) having non-uniform thickness reduces stress on th... | 10/17/2000 |
| 5959192 | Knock detecting device for internal combustion engine A knock detection device for an internal combustion engine prevents erroneous knock detection decisions from being made due to an LC resonant current in an ion current path. An LC resonance frequency, which is determined based on an inductance of ignition... | 09/28/1999 |
| 5918275 | Sensor for engine control An oxygen sensor and sensor mounting arrangement for a control system of an internal combustion engine is disclosed. The oxygen sensor senses the actual combustion conditions in a combustion chamber. An insulating arrangement is provided including an insu... | 06/29/1999 |
| 5900541 | Sensor assembly for easy removal An improved sensor and sensor assembly is provided which permits the easy removal of the sensor from its mounting bore even in the presence of corrosive residue in the mounting bore. The sensor assembly includes an elongated sensor body having an annular ... | 05/04/1999 |
| 5852234 | Knocking detecting sensor A knocking detecting sensor for detecting knocking generated in an internal combustion engine includes a vibration detecting element, a terminal, a terminal holder, a casing and a sealing member. The vibration detecting element detects vibrations due to k... | 12/22/1998 |
| 5844126 | Method and device for determining the speed of propagation of a temperature wave front in a gas The propagation of a temperature wave front in an enclosed space containing a gas features the measurement of the time which elapses between the passage of a temperature wave front past two thermionic probes 5, 6 mounted on the wall 4 of an enclosed space... | 12/01/1998 |
| 5798453 | Pressure sleeve A pressure sleeve for a vibration pickup, has a body part with a central opening for a mounting element and a supporting surface to be placed on a component causing vibrations, a detecting element arranged radially outwardly on the body part with an axial... | 08/25/1998 |
| 5719326 | Reconfigurable filter system Two filter sections having different frequency responses are interconnected via selectively enabled switches, formed on the same integrated circuit (IC) as the filter sections, between a signal input terminal and a signal output terminal. The selectively ... | 02/17/1998 |
| 5672812 | Sparkplug/pressure sensor device A pressure transducer suitable for use in measuring the pressures created by the combustive events that occur in internal combustion engines. The transducer utilizes the magnetostrictive effect to measure stress waves present in magnetized metallic compon... | 09/30/1997 |
| 5659133 | High-temperature optical combustion chamber sensor The disclosure describes a high-temperature optical transducer capable of acquiring input variables for closed-loop control of combustion systems. The key components of the innovation are a high-temperature, embedded photodiode, the use of low-cost, integ... | 08/19/1997 |
| 5659132 | Gasket enclosed sensor system A gasket enclosed sensor system designed to facilitate measurement of combustion chamber parameters, and delivery of signals to a point external to the engine. In one embodiment, the system is adaptable to an internal combustion engine that includes an en... | 08/19/1997 |
| 5528928 | Capacitive sensing apparatus for sensing a plurality of operating parameters associated with an engine In one aspect of the invention, an apparatus for sensing a plurality of operating parameters of an internal combustion engine is disclosed. An energy source supplies electrical energy to the pistons, whereby each piston forms a variable capacitor with the... | 06/25/1996 |
| 5284047 | Multiplexed single-channel knock sensor signal conditioner system for internal combustion engine A multiplexed single channel knock sensor signal conditioner system for internal combustion engines includes a plurality of sensors for sensing the vibrations associated with knocking in an internal combustion engine; a single signal conditioning channel ... | 02/08/1994 |
| 5271265 | Process and device for sensing and evaluating knocking combustion during operation of an internal combustion engine In a process and device for sensing and evaluating knocking combustion during operation of an internal combustion engine the electromagnetic radiation in a combustion chamber thereof, which changes upon knocking combustion, is detected and transmitted to ... | 12/21/1993 |
| 5113828 | Method and apparatus for determining combustion conditions and for operating an engine An internal combustion engine is provided having a luminosity detector and an arrangement for adjusting the parameters of the engine in response to sensed combustion conditions within the combustion chamber based on particular gain independent parameters ... | 05/19/1992 |
| 5099681 | Knock detector using optical fiber thermometer A knock detector for an internal combustion engine includes a pair of optical fiber thermometers that sense variations in heat flow within an engine cylinder. Each optical fiber thermometer includes a black body emitter disposed inside the cylinder which ... | 03/31/1992 |
| 5067463 | Method and apparatus for operating an engine An internal combustion engine is provided having a luminosity detector and an arrangement for measuring certain parameters and running conditions of the engine such as air/fuel ratio in response to sensed combustion conditions within the combustion chambe... | 11/26/1991 |
| 5052214 | Knock detector using optical fiber thermometer A knock detector for an internal combustion engine includes an optical fiber thermometer that senses variations in heat flow within an engine cylinder. The optical fiber thermometer includes a black body emitter disposed inside the cylinder which is heate... | 10/01/1991 |
