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| Number | Title | Issue Date |
| 7454953 | Internal combustion engine control apparatus An internal combustion engine control apparatus controls an air intake mass at an idle state after a start of an internal combustion engine based on a correction mass of the air intake mass calculated based on a desired value of the air intake mass and a measured va... | 11/25/2008 |
| 7426250 | Automatic gain controller and controlling method thereof An automatic gain controller and the controlling method thereof are disclosed. The automatic gain controller includes a first multiplexer for receiving an input signal and a gain and generating a first output, a second multiplexer for receiving a signal time constan... | 09/16/2008 |
| 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 |
| 7334568 | Knock control apparatus for an internal combustion engine and control method thereof In addition to a knock detection filter, a plurality of optimal knock frequency detection filters (digital filters: BPFs) are provided which filter the signals output from a knock sensor and has mutually different filtering frequency bands. A presently optimal frequ... | 02/26/2008 |
| 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 |
| 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 |
| 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 |
| 7024059 | Optoelectronic receiver and method of signal adjustment An optoelectronic receiver having a variable transfer function to compensate for operational condition change. The receiver comprises a linear circuit having a tunable filter. A control circuit provides a signal to the tunable filter. The control circuit is connecte... | 04/04/2006 |
| 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 |
| 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 |
| 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 |
| 6483311 | Method and device for evaluating ionic current signals for assessing combustion processes A method and an arrangement for detecting combustion misfires in internal combustion engines are presented where a measured ionic current signal is subjected to a floating short-time integration and a feature is formed which corresponds to the maximum val... | 11/19/2002 |
| 6427662 | Knock control apparatus for internal combustion engine A knock control apparatus for an internal combustion engine includes a knock detector for extracting a vibration component superposed on an ion current, and waveform shaping it at a predetermined threshold value to generate a train of knock pulses (Kp) of... | 08/06/2002 |
| 6338267 | System for rejecting noise in ignition knock data A device for rejecting noise in an ion-sense ignition knock signal compares an integrated knock signal to a peak knock signal multiplied by a time factor to determine the presence of noise. A bandpass filter coupled to an engine's spark plug through ion-s... | 01/15/2002 |
| 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 |
| 5996398 | Device for knock detection in internal combustion engine A device for detecting a knocking in an internal combustion engine has an evaluating facility, a knock sensor for sensing knocking of an internal combustion engine and producing output signals of the knocking sensor, an evaluation facility for obtaining t... | 12/07/1999 |
| 5743233 | Method for detecting knocking A method for detecting knocking provides for weighting or limitation of the knocking threshold. For this purpose, on the one hand a normal range of the reference level is defined and in the case of a deviation from this normal range the knocking threshold... | 04/28/1998 |
| 5537855 | Knock detection method and apparatus with dual integration windows A knock detection method and apparatus integrates a knock sensor signal (107) over a first period and provides a first integrated knock sensor signal (119), and integrates the knock sensor signal (107) over a second period and provides a second integrated... | 07/23/1996 |
| 5419180 | Knocking detecting apparatus for internal combustion engine A knock sensor detects the vibration of an internal combustion engine and the half wave of its output of the sensor is amplified by a half wave amplifier. From the amplified output, a vibration-signal producing circuit produces a vibration signal represen... | 05/30/1995 |
| 5408863 | Knock detector for internal combustion engine An engine knock detector including a first mechanism for sensing engine noise during a first time period of an engine combustion cycle and providing a first signal in response thereto. A second mechanism is also provided for sensing engine noise and engin... | 04/25/1995 |
| 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 |
| 5146777 | Device for detecting pinking, cylinder by cylinder, in a multi-cylinder otto engine The device includes two channels for detecting and processing the signal provided by an accelerometric sensor, operating in two frequency bands in which peaks indicative of pinking (knocking) may occur. In each combustion phase, a third channel, also conn... | 09/15/1992 |
| 5040510 | Method for controlling knocking in internal combustion engines A method for controlling knocking in internal combustion engines includes determining a measurement window for each ignition cycle. A sensor signal of a knock sensor is scanned within the measurement window at a predetermined scanning frequency to form sc... | 08/20/1991 |
| 4945876 | System and method for detecting knocking in an internal combustion engine A system and method for detecting an engine knocking for an internal combustion engine are disclosed in which an amplification factor of a voltage amplifier for amplifying a knock detection signal derived from a corresponding pressure-responsive sensor is... | 08/07/1990 |
| 4887456 | Knock detection system A knock detection system for an internal combustion engine comprises an input for receiving a signal from a vibration-sensing transducer, an amplifier to which the input is connected and a rectifying and integrating device connected to the output of the a... | 12/19/1989 |
| 4761992 | Knock detection circuit with gated automatic gain control A knock detection circuit includes an audio transducer (2) converting audio signals indicative of engine combustion into output signal voltage including a portion representing background noise and a portion representing detonation. An active variable resi... | 08/09/1988 |
| 4664083 | Adaptive knock control with variable knock tuning An adaptive knock control for a spark ignited, internal combustion engine is disclosed in which a signal indicating sensed knock induced and other bursts of engine vibrations is passed through a bandpass filter effective to tune the apparatus to a charact... | 05/12/1987 |
| 4651698 | Adaptive knock control with pulse duration discrimination control An adaptive knock control for a spark ignited, internal combustion engine is disclosed in which a signal representing sensed knock induced and other bursts of engine vibrations is demodulated to generate pulses corresponding to the envelopes of such knock... | 03/24/1987 |
| 4644918 | Knock control with AGC having reduced knock dependence A knock control for a spark ignited, internal combustion engine including an AGC amplifier in which the amplified sensor signal is demodulated, processed and compared to a fixed reference level to generate a pulsed knock signal. An error signal is generat... | 02/24/1987 |
| 4616502 | Knocking detection system for internal combustion engine In a knocking detection system for an internal combustion engine, a knocking is detected by a vibration sensor the output level of which is changed by controlling the sensor excitation current. The excitation current is controlled in dependence upon the o... | 10/14/1986 |
| 4593553 | Method for detecting engine knock in internal combustion engines A demodulated audio signal for detection of engine-knock is digitalized to produce a sequence of digital signals corresponding to the various cylinders of the engine in turn. These digital signals are recursively filtered by applying a factor k to a newer... | 06/10/1986 |
| 4565087 | Method and apparatus for recognition of knocking in an internal combustion engine Engine knock sensor signals are amplified, band-pass filtered and rectified and then a sequence of integrated signal peak values are compared with reference signals relating to a typical engine knock signal. If the deviation of the integration values or p... | 01/21/1986 |
| 4528955 | Knock control system A gain control system comprising a gain variable amplifier for amplifying an input signal linearly, a gain control circuit for producing a gain control signal for controlling the gain of the amplifier on the basis of an output signal of the amplifier, and... | 07/16/1985 |
| 4513718 | Apparatus for controlling ignition timing for internal combustion engines An ignition timing control apparatus for an internal combustion engine wherein an ignition timing θ of at least one cylinder of the engine is retarded (or advanced) by a little amount Ɗ to intentionary check the generation sensitivity of a knock ... | 04/30/1985 |
| 4499877 | Ignition timing control device for an internal combustion engine This invention enables substantially ideal ignition timing to be achieved by suitably detecting a knocking signal while avoiding interference from the various noise components in the output of a vibrational acceleration sensor on an engine, and controllin... | 02/19/1985 |
| 4495918 | Ignition timing retard angle control apparatus for internal combustion engine An ignition retard angle control apparatus for an internal combustion engine is disclosed. This control system comprises a vibration sensor for detecting engine vibrations, a filter for discriminating part of the output of the sensor in a characteristic f... | 01/29/1985 |
| 4492108 | Method and apparatus for recognizing irregular combustion processes in an internal combustion engine A method is disclosed for the recognition of irregular combustion processes in an internal combustion engine. In this method, a parameter characterizing the course of combustion--for example, pressure, light in the combustion chamber, sound and the like--... | 01/08/1985 |
| 4491010 | Dynamic combustion characteristic sensor for internal combustion engine A dynamic combustion characteristic sensor suitable for the detection of the timing of peak combustion pressure or the occurrence of knock in an internal combustion engine comprises an engine headbolt having a piezoelectric disc affixed to the surface of ... | 01/01/1985 |
| 4481924 | Engine knock detecting apparatus An engine knock detecting apparatus for sensing knocking occurring in an internal combustion engine. The engine knock detecting apparatus has a vibration sensor for sensing vibration having a vibration component caused by the knocking taking place in the ... | 11/13/1984 |
