Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7559230 | Method and device for analyzing the combustion noise in a cylinder of an internal combustion engine When detecting the combustion noise on a combustion engine (10) by using a knock sensor (14), the problem arises in that prior art methods cannot determine with sufficient accuracy how much fuel reaches the cylinder (11) of the combustion engine... | 07/14/2009 |
| 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 |
| 7415347 | Combustion knock detection and control through statistical characterization of knock levels A method of statistically characterizing combustion knock events includes receiving signals from a sensing device such as an accelerometer, estimating at least one parameter of a probability distribution function based on the received signals, and calculating a valu... | 08/19/2008 |
| 7347081 | Knock detecting apparatus and method for internal combustion engine The signal levels of vibration waveform signals outputted by knock sensors are extracted at a filter processing section for each of a plurality of frequency bands. The mean value of the signal levels in the frequency bands at a point in time when variation of the si... | 03/25/2008 |
| 7299680 | Knocking detection An in-cylinder pressure sensor for outputting a signal corresponding to an internal cylinder pressure of an engine is provided. A first signal and a second signal are extracted from the output signal of the in-cylinder pressure sensor. The first signal has a frequen... | 11/27/2007 |
| 7286924 | Knocking determining apparatus of internal combustion engine A knocking determining apparatus of an internal combustion engine that includes an in-cylinder injector and an intake port injector and that determines knocking based on an output signal of a knock sensor. The knocking determining apparatus includes a knocking deter... | 10/23/2007 |
| 7263872 | Method for determining the energy of a knock signal for an internal combustion engine The invention relates to a method for determining the energy (KNKE) of the knock of an internal combustion engine, using an analog signal supplied by a sensor fixed to the engine. The inventive method includes the following steps: a) the analog signal is shaped, b) ... | 09/04/2007 |
| 7257482 | Misfire detection apparatus Misfire of an engine is detected by extracting a pressure component of combustion from an output of a pressure sensor disposed in a cylinder. An engine misfire detection apparatus obtains a combustion parameter Cr that is a correlation between a reference signal Fc ... | 08/14/2007 |
| 7255090 | Compression ignition engine with pressure-based combustion control An internal combustion engine having a plurality of combustion cylinders configured to operate in a compression ignition mode. A pressure sensor is provided to sense pressure within a combustion cylinder of the engine. A combustion control system, including an elect... | 08/14/2007 |
| 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 |
| 7243020 | Knock detection apparatus and knock detection method A knock detection apparatus which is capable of changing a knock control starting time period appropriately so as to prevent erroneous knock determination, to thereby expand a knock control range. A peak value acquisition unit acquires a peak value of a vibration of... | 07/10/2007 |
| 7206691 | Internal combustion engine knock determination device An engine ECU executes a program including a step of calculating a knock intensity N as based on comparing a waveform detected as a waveform of a vibration attributed to knocking with a knock waveform model stored in a memory as a waveform of a vibration attributed ... | 04/17/2007 |
| 7203590 | Method and device for controlling an internal combustion engine A device and a method for controlling an internal combustion engine, in which, based on a signal that characterizes the vibrations of an internal combustion engine, at least one feature is determined and used to regulate and/or control operating parameters of the in... | 04/10/2007 |
| 7200487 | System and method for processing an accelerometer signal to assist in combustion quality control in an internal combustion engine A method for processing an accelerometer signal associated with the combustion process in an operating internal combustion engine, the method comprising the steps of measuring an accelerometer signal across a window of selected crank angle degrees during a cycle of ... | 04/03/2007 |
| 7162360 | Combustion state detecting apparatus for an engine A combustion state detecting apparatus is provided for an engine having internal pressure sensor for detecting an internal pressure of a combustion chamber of the engine and crank angle detector for detecting a crank angle of the engine. The apparatus calculates a v... | 01/09/2007 |
| 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 |
| 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 |
| 7035718 | Method and System for detecting and reducing draft tube pressure fluctuations A method and system to reduce vibration in a turbine-generator including measuring a magnitude of radial vibration of a turbine shaft with at least one vibration sensor configured to generate a vibration signal indicative of vibration frequency; measuring a generato... | 04/25/2006 |
| 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 |
| 6975969 | Device for error recognition in a digital signal evaluation unit A device for signal evaluation is described, in particular for knock recognition in an internal combustion engine, in which the signals forwarded by sensors are evaluated digitally and error recognition is carried out that performs two different test functions, wher... | 12/13/2005 |
| 6934665 | Electronic sensor with signal conditioning A method for extracting components from signals in an electronic sensor (50) having a sensing element (52). The sensing element (52) generates a first signal (60) and a second signal (62). The method comprises the steps of: receivi... | 08/23/2005 |
| 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 |
| 6880381 | Knock detection device A knock detection device that can not only detect knock accurately, but can also detect heavy knock quickly. Cylinder pressure is detected by a pressure sensor installed in each cylinder in an internal combustion engine. AS the occurrence or non-occurrence of heavy ... | 04/19/2005 |
| 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 |
| 6655191 | Method for detecting knocking combustion in the operation of an internal combustion engine In a method for detecting knocking combustion during the operation of an internal combustion engine with a device for measuring the ionic current, the raw ionic current signal or the evaluated value of the knocking intensity are normalized. This enables t... | 12/02/2003 |
| 6550311 | Method of error detection during evaluation of sensor signals A method for error detection during an evaluation of sensor signals, in particular during an evaluation of output signals of knock sensors in an internal combustion engine, with at least one sensor and an evaluating device connected therewith, the method ... | 04/22/2003 |
| 6529817 | Apparatus for knock detection with digital signal analysis and method of detecting knock using same The apparatus detects knock in an internal combustion engine with at least one knock sensor associated with a cylinder of the internal combustion engine. The apparatus initially processes the analog knock sensor output signals in an analog signal preparin... | 03/04/2003 |
| 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 |
| 6411886 | Method of detecting and controlling detonation of an internal combustion engine A method of detecting and controlling detonation, including the steps of: generating (10) a vibration signal (D) proportional to the intensity of vibration on the crankcase; wide-band-filtering (11) the vibration signal (D) to generate a first intermediat... | 06/25/2002 |
| 6378494 | Knock detection apparatus To obtain a knock detection apparatus which may obtain a good knock pulse S/N even if an ionic current generation amount is changed by the change of a kind of fuel or plugs, a knock detection apparatus for detecting a knock generated, in an internal combu... | 04/30/2002 |
| 6334353 | Knock detection apparatus for an internal combustion engine To obtain a knock detection apparatus for an internal combustion engine which may obtain a good knock pulse S/N even if an ionic current generation amount is changed by the change of a kind of fuel or plugs, a vibratory component superimposed on an ionic ... | 01/01/2002 |
| 6328016 | Knock suppression control apparatus for internal combustion engine A knock suppression control apparatus for an internal combustion engine which can avoid erroneous knock detection and hence the erroneous knock suppression control, to thereby ensure knock suppression control with high reliability. The knock suppression c... | 12/11/2001 |
| 6273064 | Controller and control method for an internal combustion engine using an engine-mounted accelerometer A control system and method for obtaining combustion stability in an internal combustion engine including an accelerometer mounted on the engine for detecting engine block vibrations and an engine controller for processing an accelerometer output signal i... | 08/14/2001 |
| 6145491 | Method for detecting combustion knock from the ionic current in an internal combustion engine A method of recognizing knocking combustion in an internal combustion engine involves sensing an ionic current in the combustion chamber and providing a corresponding ionic current signal, detecting the signal during a pertinent time window and band-pass ... | 11/14/2000 |
| 6091244 | Method and arrangement for detecting combustion misfires of a internal combustion engine The invention is directed to a method of detecting combustion misfires of an internal combustion engine wherein an ion current is generated during the operation of the engine. The ion current signal is detected over a pregiven time interval starting with ... | 07/18/2000 |
| 6012425 | Device for detecting knocking and regulation of an internal combustion engine A device for detecting knocking and regulating an internal combustion engine has at least one knocking sensor adapted to be assigned to a cylinder of the internal combustion engine and delivers an electrical output signal which is a function of a combusti... | 01/11/2000 |
| 5978728 | Detonation detection method for internal combustion engines The method includes the steps of generating a detonation signal related to the intensity of the vibration on an engine block; wide-band filtering the detonation signal; rectifying the filtered detonation signal; integrating the rectified signal; calculati... | 11/02/1999 |
| 5762045 | Method of and apparatus for ascertaining a knock intensity signal of an internal combustion engine A method of and an apparatus for ascertaining a knock intensity signal of an internal combustion engine, wherein an electrical light signal corresponding to the light emission in the combustion chamber is obtained by way of an optical sensor which extends... | 06/09/1998 |
| 5758312 | Apparatus for eliminating noises accompanying the knocking signal of an automobile engine A knocking control system for an engine comprising a knocking sensor for producing a knocking signal representing the extent of knocking in the engine; reference signal circuitry for producing a first reference signal representing a first value and a seco... | 05/26/1998 |
| 5632247 | Preignition detecting system A preignition detecting system capable of detecting a preigniting condition (PI) at an early time. Vibration of an internal combustion engine is detected by a vibration sensor 113, and is fetched by a controller 12. The crank angle is detected by a crank ... | 05/27/1997 |
