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| Number | Title | Issue Date |
| 7624620 | Combustion pressure sensor A combustion pressure sensor for detecting a combustion pressure in a combustion chamber of an engine is disclosed as having a housing mounted to an engine head in a gastight structure, a pressure sensor carried on the housing at a base end portion thereof, a transf... | 12/01/2009 |
| 7555932 | Combustion pressure sensor A combustion pressure sensor for detecting a pressure in the combustion chamber of an internal combustion engine includes a heat releasing member disposed between a housing and a pressure transmitting member at a position forward of a load detecting section and slid... | 07/07/2009 |
| 7440839 | Method and associated device for sensing the air/fuel ratio of an internal combustion engine A method of sensing the air/fuel ratio in a combustion chamber of an internal combustion engine that may be easily implemented by a respective low-cost device includes a pressure sensor and a learning machine that generates a sensing signal representing the air/fuel... | 10/21/2008 |
| 7398674 | Device for pressure measurement, particularly in a combustion chamber of an internal combustion engine The invention relates to a device for measuring at least the pressure of a fluid present in a chamber (16), comprising a sensitive element (36) arranged in a housing (38), supported by a joint (10) inserted between two elements (12, 14... | 07/15/2008 |
| 7337657 | Pressure glow plug for a diesel engine A pressure glow plug for a diesel engine has a glow plug body 2 for being inserted into a cylinder of the diesel engine, a heating rod 1 that is arranged in the glow plug body 2 and a pressure sensor 9 that is arranged between the heating... | 03/04/2008 |
| 7316164 | Pressure detection device and manufacturing method of the same A pressure detection device includes a sensing part that is provided at one end portion of the housing to output an electrical signal responsive to an applied pressure, a circuit part that is provided at an other end portion of the housing to process the signal from... | 01/08/2008 |
| 7313949 | Combustion chamber pressure sensor equipped with damper body for attenuating transmitted engine vibration A combustion chamber pressure sensor for an internal combustion engine includes an elongated pressure transmitting member having one end exposed to the interior of an engine cylinder and the opposite end contacting a pressure sensing element which generates a pressu... | 01/01/2008 |
| 7310993 | Pressure sensor apparatus for measuring pressures including knock conditions in engine cylinders Sensor apparatus for a multiple layer steel (MLS) cylinder head gasket measures combustion pressures for detecting engine conditions. A membrane is positioned at one end of an elongated metal tube, and the membrane end of the tube engages a cylinder bore boundary. A... | 12/25/2007 |
| 7302856 | Strain sensors based on nanowire piezoresistor wires and arrays A highly sensitive and ultra-high density array of electromechanical nanowires is fabricated. Nanowires are extremely sensitive to the strain induced by the attachment of biological and chemical species. Real-time detection is realized through piezoresistive transdu... | 12/04/2007 |
| 7292926 | Method and device for estimation of combustion chamber pressure It is claimed that statements regarding cylinder pressure are obtained for optimization of the combustion process in internal combustion engines. The internal combustion engine is modeled with a plurality of model parameters (1 to 5) for this purpose. ... | 11/06/2007 |
| 7272970 | Spark plug having combustion pressure detecting function A spark plug having a combustion pressure detecting function, including a tip end portion in an axial direction of the spark plug capable of generating a spark discharge, a male thread adapted for attaching the spark plug to an internal combustion engine and a metal... | 09/25/2007 |
| 7251990 | Method and a relative device for diagnosing misfire or partial combustion conditions in an internal combustion engine A method of diagnosing misfire or partial combustion conditions in an internal combustion engine without using a phonic wheel discriminates the combustion conditions with soft-computing techniques directly exploiting a combustion pressure signal generated by a commo... | 08/07/2007 |
| 7214908 | Glow plug integrated pressure sensor with filter trap In an integrated glow plug and pressure sensor having a passage leading to the pressure sensor, a porous filter is inserted in the passage. The porous filter provides a four-fold improvement in pressure measurement by (1) acting as a trap for combustion deposits, (2... | 05/08/2007 |
| 7212912 | Internal cylinder pressure detection An in-cylinder pressure sensor outputs a signal corresponding to a change rate of an internal cylinder pressure of an engine. The output signal of the in-cylinder pressure sensor is filtered so that frequency components lower than frequencies that substantially comp... | 05/01/2007 |
| 7207214 | Glow plug integrated pressure sensor A pressure-sensing element for an internal combustion engine is located in the sleeve of a ceramic glow plug heater having axial and radial pressure channels connecting the sensor diaphragm to the combustion chamber. The sensor signal conditioner is encapsulated in ... | 04/24/2007 |
| 7191658 | Pressure-detecting device and method of manufacturing the same One end of a rod-like pressure-conveying member is disposed in a sensing unit, and the other end extends into and through an insertion hole of an engine. A combustion pressure, to which the other end of the rod-like member is exposed, is conveyed to the sensing unit... | 03/20/2007 |
| 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 |
| 7159448 | Combustion-chamber pressure sensor having a metallic diaphragm containing a piezoresistive, thin metallic layer A pressure sensor for measuring the pressure in a space acted upon by high pressure. The signals detected by the pressure sensor are supplied to evaluation electronics. A sensor diaphragm is accommodated on the end of the pressure sensor pointing towards the space a... | 01/09/2007 |
| 7149374 | Fiber optic pressure sensor A fiber optic pressure sensor includes an optical fiber for transmitting light. The optical fiber has an axis. The fiber optic pressure sensor also includes an etched diaphragm perpendicular to the axis. The diaphragm includes an operative side located at a distance... | 12/12/2006 |
| 7117726 | Method and apparatus for indirect measurement of engine cylinder pressure An apparatus for determining the pressure within the combustion chamber of an engine. The engine has a fuel injector seated within an opening of a cylinder head to inject fuel into the combustion chamber. Combustion chamber pressure acts upon the fuel injector to ej... | 10/10/2006 |
| 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 |
| 7079936 | Method and apparatus for sampling a sensor signal In an apparatus, a timing signal outputting unit outputs a timing signal every time interval. The time interval is shorter than a pulse time interval of the pulse signal. A first storage unit stores first information relative to each pulse time interval of the pulse... | 07/18/2006 |
| 7048085 | Weight classification system A method and apparatus is provided that classifies a seat occupant into one of several different weight classes based on an estimated value of the seat occupant weight. An occupant's measured weight varies when the occupant's seating position changes or when the veh... | 05/23/2006 |
| 7032438 | Pressure gauge glow plug A pressure gauge glow plug for a diesel engine having a plug body, a heating element, and a pressure sensor, which is positioned under pretension between the heating element and the plug body in such a way that the pressure sensor experiences the pressure existing i... | 04/25/2006 |
| 7034708 | Active magnetostrictive sensor for automotive horn or occupant weight sensor An improved force-measurement system utilizes active magnetostrictive sensors for generating a signal representative of a force, such as the weight of a person or thing on a seat within a motor vehicle, or the force applied to the horn sensor switch on a vehicle ste... | 04/25/2006 |
| 7017699 | Device for detecting the weight loaded onto a vehicle seat with a sensor and spring body A device for detecting the weight loaded on a vehicle seat with a sensor (22) and a spring body (24) that connects the vehicle seat to an underbody (18) of a corresponding motor vehicle and is connected, in one fastening area (e.g., 28), ... | 03/28/2006 |
| 7004472 | Cylinder head gasket A metallic cylinder head gasket for an internal combustion engine having at least one combustion chamber. The gasket includes at least one sheet-metal layer having at least one opening corresponding to the at least one combustion chamber of the internal combustion e... | 02/28/2006 |
| 6952948 | Spark plug for receiving a pressure sensor and corresponding spark plug connector A spark plug for accommodating a pressure sensor. A connecting channel for extending a connecting line of the sensor extends in a housing and in a central section of the insulating core of the spark plug. As a result of this setup, the connecting line is extended in... | 10/11/2005 |
| 6923042 | Ignition apparatus for internal combustion engine An earth electrode is formed on the brim surface of the plug insulator and on the outer surface of the middle portion of the plug insulator along the axial direction. The earth electrode connected with one side of the combustion pressure sensor is provided on a whol... | 08/02/2005 |
| 6923046 | Arrangement and method to measure cylinder pressure in a combustion engine The pressure in a cylinder of a combustion engine is determined on the basis of vibrations in the engine which are generated during movement of the piston. A vibration signal (S) from a vibration sensor situated on a cylinder is filtered in the region about the pist... | 08/02/2005 |
| 6843111 | LCC-based strain-gage sensor integrated with cylinder-head gasket An integrated LCC-based strain gage sensor, in which at least two LCC traces or strands run across a microcavity within the cylinder head gasket. In one aspect of the present invention, a system is provided comprising a signal source and a microcavity through which ... | 01/18/2005 |
| 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 |
| 6701775 | Pressure sensor apparatus for measuring pressures including knock conditions in engine cylinders Sensor apparatus for a multiple layer steel (MLS) cylinder head gasket measures combustion pressures for detecting engine conditions. A membrane is positioned at one end of an elongated metal tube, and the membrane end of the tube engages a cylinder bore ... | 03/09/2004 |
| 6679100 | Spark plug mounted thick film strain gauge A thick film resistor strain gauge is applied to a stainless steel shell portion of a spark plug. There are two preferable ways of applying a thick film resistor to the metal shell. In a first embodiment, the thick film resistor may be directly printed on... | 01/20/2004 |
| 6675785 | Ignition device for an internal combustion engine An insulator includes a coil side cylindrical portion extending from a plug side cylinder portion in a direction departing from a combustion chamber. One end of the coil side cylindrical portion protrudes in the direction departing from the combustion cha... | 01/13/2004 |
| 6668632 | Spark apparatus with pressure signal response amplification 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... | 12/30/2003 |
| 6557528 | Method of controlling detonation in an internal combustion engine A method of controlling detonation in an internal combustion engine is provided with the steps of: combusting a fuel and air mixture within a combustion cylinder; sensing a plurality of pressures at discrete points in time within the combustion cylinder; ... | 05/06/2003 |
| 6539787 | Glow plug having a combustion pressure sensor A gas tight and simplified glow plug includes a combustion pressure sensor. The plug main body includes a cylindrical housing to be mounted in an engine head with one end side positioned at a combustion chamber side of the engine head. A cylindrical sheat... | 04/01/2003 |
| 6397669 | Method and arrangement for evaluating combustion processes in an internal combustion engine A method and an arrangement for evaluating the combustion operations in an internal combustion engine with a model is suggested. The model takes a time-dependent transfer between pressure and structure-borne noise as a basis for the relevant low frequency... | 06/04/2002 |
