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| Number | Title | Issue Date |
| 8151627 | Knock detection device and knock detection system diagnosis device An output signal of a knock sensor is converted by an A/D conversion part in a specified knock determination range. In a time-frequency analysis part, data of frequency, time, and vibration intensity are extracted at the same time from an output signal of the knock ... | 04/10/2012 |
| 8091412 | Method and devices to identify the piston in the compression phase in an internal combustion engine equipped with a gasoline indirect electronic injection system The invention relates to the field of method and devices therefore for identifying which cylinder is in the compression phase in a gasoline indirect electronic injection internal combustion engine. The present invention develops over various phases, measuring... | 01/10/2012 |
| 7669459 | Knocking determination device for internal combustion engine An engine ECU includes a bandpass filter (1) extracting only vibrations at a first frequency band A, a bandpass filter (2) extracting only vibrations at a second frequency band B, a bandpass filter (3) extracting only vibrations at a third frequ... | 03/02/2010 |
| 7621172 | Knocking determination device for internal combustion engine An engine ECU 200 includes a bandpass filter (1), a bandpass filter (2), and a bandpass filter (3). The bandpass filter (1) extracts only vibrations at a first frequency band A from the vibrations detected by a knock sensor. The ba... | 11/24/2009 |
| 7458249 | Method and device for operating an internal combustion engine A method and a device for operating an internal combustion engine which allow monitoring of errors during combustion without using a pressure sensor are provided. The internal combustion engine includes a final controlling element in an exhaust system of the interna... | 12/02/2008 |
| 7454954 | Knocking presence evaluation circuit for an internal combustion engine, knocking identification and control system and corresponding pressure signal processing method A knocking presence evaluation circuit in an internal combustion engine having a pressure sensor facing a combustion chamber for each cylinder in the engine and suitable to produce a pressure signal, the circuit having an input terminal; a processing block connected... | 11/25/2008 |
| 7366605 | Method and device for controlling and/or regulating an internal combustion engine A device and a method for controlling and/or regulating an internal combustion engine, in particular an internal combustion engine having direct injection. A regulation adjusts a combustion state variable, that characterizes the combustion state, to a setpoint value... | 04/29/2008 |
| 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 |
| 7292932 | System and method for controlling speed of an engine A system and method for controlling the speed of an engine includes determining a desired engine power output and engine speed, and determining whether the desired engine speed is within one of a number of predetermined engine speed ranges. It is then determined whe... | 11/06/2007 |
| 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 |
| 7278303 | Method for diagnosing an engine control unit and corresponding engine control unit A method for diagnosing an engine control unit (4) conducts an analysis as to whether the signal values from the cylinder pressure sensors (3) are faulty based on at least one characteristic value which is derived from an evaluation of signal values fr... | 10/09/2007 |
| 7254475 | Detection systems and methods One embodiment of the invention provides a detection system. The detection system includes an analog to digital converter that converts one or more analog vibration signals into one or more digital samples, a filter that analyzes at least a portion of the one or mor... | 08/07/2007 |
| 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 |
| 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 |
| 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 |
| 6932056 | Method for reacting to knock event in an internal combustion engine A control method for controlling an internal combustion engine selects a knock threshold magnitude and compares it to individual knock event magnitudes. The difference between these two values is calculated and limited to be within a predetermined range of values. T... | 08/23/2005 |
| 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 |
| 6480792 | Fatigue monitoring systems and methods incorporating neural networks A fatigue monitoring system and method is disclosed in which a stream of data relating to the stresses experienced at a plurality of locations over the structure during operation is applied to a neural network trained to remove data stream values deemed t... | 11/12/2002 |
| 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 |
| 6360587 | Pre-ignition detector An apparatus for detecting a pre-ignition combustion condition in an internal combustion engine. An ion sensing circuit measures an ion current during the ignition coil charging time. An ion current level above a predetermined reference level indicates pr... | 03/26/2002 |
| 6151954 | Device for detecting knocking in an internal combustion engine A device for detecting knocking of an internal combustion engine which, even when spike noise is generated, does not erroneously detect it as knocking. An ionic current signal detected by an ionic current detecting unit 17 is separated into a knocking fre... | 11/28/2000 |
| 6105552 | Abnormal combustion detection apparatus and method for internal combustion engine An abnormal combustion detection apparatus for an internal combustion engine quickly detects the occurrence of preignition by using a knock sensor. When the knock sensor detects an engine knocking, the ignition timing is delayed. If despite the delay of i... | 08/22/2000 |
| 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 |
| 5834636 | Engine control apparatus The object of the invention is to provide a low-priced engine control apparatus having a single CPU configuration which can be used for knocking detection and engine control as well, including: an A/D conversion unit which samples, at a predetermined cycl... | 11/10/1998 |
| 5811667 | Knock determination using a variable averaging coefficient To ensure both responsiveness and stability of a knock determination in which a knock sensor signal is compared with a knock determining reference computed from a background value, a difference between the knock sensor signal and the background value is d... | 09/22/1998 |
| 5751147 | Preignition detecting method A preignition detecting method which prevents preignition (PI) from being misjudged as having occurred when an ignition plug is fouling. It is determined whether or not the ignition plug fouls in accordance with a voltage, developed across a detecting res... | 05/12/1998 |
| 5719330 | Automotive igniton module diagnostic Ignition modules for directly applying spark plug drive signals to spark plug pairs disposed in engine cylinders are diagnosed by issuing drive signals to the ignition modules and then monitoring the corresponding engine cylinders for misfire condition pa... | 02/17/1998 |
| 5682860 | Device and method for ignition detection The process for ignition detection for an ignition system in a combustion engine wherein a first ignition pulse is generated in a cycle for generating a first ignition spark and at least a second ignition pulse for generating a second ignition spark provi... | 11/04/1997 |
| 5665906 | Device for generating a synthetic signal for testing knock control functions A device for generating a synthetic signal for testing knock control functions in engine control devices of motor vehicles has a basic noise signal generating unit, a knock signal generating unit, and an actuating device. The output signals of the basic n... | 09/09/1997 |
| 5581016 | Aircraft engine detonation indication system A detonation detection system for internal combustion piston engines which senses pressure within each cylinder through a piezoelectric force transducers installed under each spark plug producing pressure charged signals which signal is converted from inl... | 12/03/1996 |
| 5571958 | Apparatus and method for detecting misfire in an internal combustion engine A basic injection pulse width Tp which is representative of engine load is weightingly averaged, and a judgment value is set based on the weighted average value. The combustion pressure is integrated over a predetermined integral interval and when the com... | 11/05/1996 |
| 5495757 | Method and device for detection of ignition failures in an internal combustion engine cylinder A second spark is triggered, after a first ignition spark. The initiation overvoltage of the second spark is detected. The overvoltage and the occurrence or the non-occurrence of a failure of ignition of the air/fuel mixture prior to the second spark is d... | 03/05/1996 |
| 5467638 | Method and device for recognizing the knocking of an internal-combustion engine The method of detecting knocking of an internal combustion engine includes generating a sensor signal with a knock sensor provided with the internal combustion engine; digitizing the knock sensor signal to form a digitized signal; high-pass filtering the ... | 11/21/1995 |
| 5333489 | Circuit arrangement to detect knocking The circuit arrangement for detecting and evaluating knocking in an internal combustion engine includes a knock sensor located in the internal combustion engine to generate a knock sensor signal having knock signal frequency components of differing knock ... | 08/02/1994 |
| 5220821 | Method of detecting knock in internal combustion engines To detect knock, a detected signal relating to a combustion property in a cylinder of an engine is generated. The detected signal (I) is filtered to select those portions characteristic of knock. However, the filtered signal (I') is only investigated to d... | 06/22/1993 |
| 5205258 | Knock suppressing apparatus and method A knock suppressing apparatus for an internal combustion engine includes an amplifier that amplifies the output signal of a knock sensor for sensing engine vibrations. A vibration level signal and a threshold signal are generated based on the amplifier ou... | 04/27/1993 |
| 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 |
| 4930478 | Method of operating an engine An internal combustion engine having a luminosity probe and an arrangement for adjusting the running parameters of the engine to obtain the desired luminosity. Also disclosed is an arrangement for maintaining uniformity from cycle to cycle in a given comb... | 06/05/1990 |
| 4829956 | Method and apparatus for detecting discrete levels of detonation in an internal combustion engine A method detects the magnitude of knock in an internal combustion engine. Each knock is quantified into a discrete level which gives an indication of the operating condition of the engine. The discrete level signals provide information helpful during engi... | 05/16/1989 |
