Did You Know...
...that Kleenex tissue was originally designed to be a gas mask filter? It was developed at the beginning of World War I to replace cotton, which was then in short supply as a surgical dressing.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8099996 | Method and system for knock detection This invention relates to a method for knock detection in a combustion engine, in which combustion is controlled by a control unit (2), which comprises the steps of, a) obtaining at least one sensor signal (4, 4′) carrying information of knock intens... | 01/24/2012 |
| 8020429 | Device and method for determining knocking of internal combustion engine An engine ECU executes a program including calculating a correlation coefficient by dividing the sum of respective absolute values, which are each a difference between a magnitude in an engine vibration waveform and a magnitude in a knock waveform model for every cr... | 09/20/2011 |
| 7942040 | Knocking determination device and method for internal combustion engine Out of synthesized waveforms of vibrations in a first frequency band A to a third frequency band C, a knock magnitude N is calculated by using a portion β having an integrated value greater than a reference magnitude in a knock region but not using a portion having... | 05/17/2011 |
| 7614277 | Knock sensor A knock sensor includes: a base made up of a flange portion, and a tube portion; a sensor main body including a piezoelectric element that is fitted over an outer peripheral portion of the tube portion; and a stopper ring that is fitted over the outer peripheral por... | 11/10/2009 |
| 7571635 | Engine knock detection system and method An engine knock detection system for a vehicle engine includes a controller receiving an input indicative of strain applied to an engine component and an output for providing a signal indicative of engine knock. A sensor may be associated with the engine that measur... | 08/11/2009 |
| 7424820 | Knocking state determination device An engine ECU executes a program including a step of calculating intensity values LOG(V) based on signals transmitted from a knock sensor; a step of deciding a maximum value V(MAX) in frequency distribution of intensity values LOG(V) for N cycles (N is a natural num... | 09/16/2008 |
| 7403850 | Automated fault diagnosis method and system for engine-compressor sets The automated fault diagnostic system operates on engine-compressor sets with one vibration sensor per sub-group of engine cylinders and one sensor per compressor cylinder. Vibration signals linked to crankshaft phase angle windows (“VT”) mark various engine eve... | 07/22/2008 |
| 7305296 | Device and method for processing data that are obtained by sampling an analog signal A device and a method for processing data, in particular measuring data of a knock sensor of an internal combustion engine, are provided, the data being obtained by sampling an analog signal. The sampled values are combined to form data blocks and then processed as ... | 12/04/2007 |
| 7295916 | Method and device for detecting knocking A method and a device for detecting knocking, in which a measurement signal of a knock sensor is evaluated during combustion in a cylinder of a combustion engine to determine whether the combustion occurred with knocking. The measurement signal is subdivided into a ... | 11/13/2007 |
| 7263427 | Failure diagnostic method and apparatus for manifold pressure sensors A failed manifold pressure sensor is identified in a control apparatus having two manifold pressure detecting systems as a failsafe. A first comparing unit outputs an abnormal signal when a difference ΔP between manifold pressures PMa and PMb detected respectively ... | 08/28/2007 |
| 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 |
| 7181338 | Knock determining apparatus for internal combustion engine For each predetermined crank angular interval, an output of a knock sensor is separated into a plurality of frequency components through a plurality of band-pass filters, and peak values of each frequency component are extracted. Then, a mean and a variance of the p... | 02/20/2007 |
| 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 |
| 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 |
| 7096725 | Cylinder head gasket with integrated sensor A multilayer metal gasket for an internal combustion engine having an integrated sensor or sensors, such as a pressure sensor. The sensor is located within a combustion cylinder opening in the gasket. Preferably, a sensor is located within each combustion cylinder o... | 08/29/2006 |
| 7088829 | Method and apparatus for producing sounds that depend on the operation of an internal combustion engine in the interior space of a motor vehicle An apparatus for producing sounds corresponding to the operation of an internal combustion engine in the interior space of a motor vehicle is characterized by a pressure sensor (20) that detects fluctuations in pressure in a fresh air stream into the engine, ... | 08/08/2006 |
| 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 |
| 7055372 | Method of detecting cylinder ID using in-cylinder ionization for spark detection following partial coil charging The present feature of the invention comprises a method and apparatus for determining cylinder ID. When a cylinder is compressed, the resistance increases across the spark plug gap. Thus, if a spark coil is only partially charged before activation of the spark, the ... | 06/06/2006 |
| 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 |
| 7051711 | Knock recognition in internal combustion engines with modifications by changing filter characteristics or cylinder specific changes Devices and methods for knock detection and knock control are described, in which, in addition to the customary component parts, the knock-detection circuit has a filter with switchable filter characteristic. The switchover of the filter characteristic, i.e. the shi... | 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 |
| 7010460 | Reciprocating engine cylinder contribution tester and method Engine cylinder contribution analysis is provided. An engine cylinder contribution tester includes a displacement measurement device and a signal analyzer. The displacement measurement device detects engine block movements or displacement relative to a fixed positio... | 03/07/2006 |
| 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 |
| 6947829 | Apparatus for detecting knocking of internal combustion An apparatus is provided for detecting an occurrence of knocking of an engine from a signal sensed by a knocking sensor for the engine. The apparatus comprises plural filters extracting, from the signal, plural signal components whose frequency bands mutually differ... | 09/20/2005 |
| 6938466 | Fuel driveability index detection An exemplary embodiment is a method, system and storage medium for fuel driveability index detection. The system includes an engine and an oxygen sensor disposed within the exhaust gas passage of the engine. An engine control module is operatively connected to the e... | 09/06/2005 |
| 6922628 | IC engine diagnostic system using the peak and integration ionization current signals The present invention includes an engine diagnostic method and routine, wherein a method of using an ionization signal to perform an engine diagnostic routine includes the steps of detecting the ionization signal; integrating the ionization signal over a first sampl... | 07/26/2005 |
| 6912460 | Method for detecting knock in an internal combustion engine The method for knock detection includes establishing that knock is occurring in the internal combustion engine when the amplified knock signal exceeds a predetermined reference level in a predetermined manner. The reference level is determined on the basis of indivi... | 06/28/2005 |
| 6868330 | Method of setting the knock detection sensor of a piston engine A method of operating a knock detection system of a multi-cylinder piston engine in which the knock detection system comprises a sensor arranged in connection with each cylinder and a measurement circuit connected to the sensor includes running the engine at a load ... | 03/15/2005 |
| 6862517 | Method for processing a sensor signal of a knocking sensor for an internal combustion engine Method for processing a sensor signal of a knocking sensor for an internal combustion engine, having the following steps: a time window is defined for the evaluation of the sensor signal as a function of the operating state and/or the operating behavior of the inter... | 03/01/2005 |
| 6849238 | Measuring sensor for gases The measuring sensor, particularly a lambda probe, has a ceramic sensor member retained at a high temperature during measuring operation. It is shielded from water droplets, carried along in the gas to be analyzed, by a heated protective housing, permeable for the g... | 02/01/2005 |
| 6817226 | Sensing assembly and method of making same A sensing assembly identifies detonations in a plurality of cylinders of an internal combustion engine. The internal combustion engine includes an engine block. The sensing assembly includes a base that is fixedly secured to the engine block of the internal combusti... | 11/16/2004 |
| 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 |
| 6727812 | Method and device for error detection and diagnosis in a knock sensor A method and a device for fault detection or diagnosis may be used on a multi-cylinder internal combustion engine with a knock sensor. For diagnostic purposes an instantaneous reference value formed from the sensor signal may be compared with predefinable upper or l... | 04/27/2004 |
| 6655352 | Integrated bolt two-piece sleeve design for flat response knock sensor A mounting fixture for an engine knock sensor is provided. The fixture includes a base and a support member. The support member is joined to the base with a press fit joint. The base includes an aperture and the support member is inserted in the aperture.... | 12/02/2003 |
| 6456927 | Spectral knock detection method and system therefor A spectral method, and corresponding system, for knock detection includes acquiring (603) spectral energy associated with vibration caused by a knocking condition from a running engine. Preferably, a sampled data system (105) acquires the spectral energy ... | 09/24/2002 |
| 6289720 | Method of knocking control of internal combustion engine A method for controlling knocking of an internal combustion engine in which a knocking signal and a combustion signal are formed by directing vibrations detected by a vibration sensor through a primary filter circuit including a combustion filter circuit ... | 09/18/2001 |
| 6267100 | Device for suppressing engine knocking in internal combustion engines A device for suppressing knocks in internal combustion engines, in which the ignition firing point is adjusted after knocking has occurred, and this knock control is only activated in response to specifiable thermal conditions in the internal combustion e... | 07/31/2001 |
| 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 |
| 6061637 | Method of determining knock resistance rating for non-commercial grade natural gas A method for calculating knock resistance ratings for various blends of non-commercial grade natural gas involves the use of a computer model derived from collecting experimental data for constituent concentration levels typical in field grade natural gas... | 05/09/2000 |
