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| Number | Title | Issue Date |
| 7370634 | Internal combustion engine spark timing control system A method for controlling spark timing in an internal combustion engine. The method includes determining, in response to a knock sensor mounted to the engine, a spark offset to the scheduled spark timing for the engine at relatively low engine speed which is applied ... | 05/13/2008 |
| 7290442 | Method and system of estimating MBT timing using in-cylinder ionization signal A robust multi-criteria minimum timing for the best torque (MBT) timing estimation method and apparatus utilizes different ionization signal waveforms that are generated under different engine operating conditions. The MBT timing criteria is calculated based upon bo... | 11/06/2007 |
| 7281516 | Ignition timing control device of internal combustion engine An engine ECU executes a program including the steps of: comparing a vibration waveform of an engine and a knock waveform model stored in advance to calculate a correlation coefficient K; prohibiting correction when a correction prohibiting condition of a determinat... | 10/16/2007 |
| 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 |
| 7013871 | Closed loop MBT timing control using ionization feedback This feature of the present invention comprises a closed loop which uses estimated MBT timing criteria and ignition diagnostics (knock, partial-burn, and misfire) to control engine ignition. When the engine is not knock limited, it operates at its MBT timing. When t... | 03/21/2006 |
| 7010418 | Method and device for blanking out interference noise during knock recording in an internal combustion engine The present invention creates a method and an apparatus for blanking out interfering noise in connection with detecting knocking in an internal combustion engine. The following functions are performed: Forming a sensor signal integral value (KI) during a measurement... | 03/07/2006 |
| 6945229 | System for engine knock control The present invention provides a system for controlling knock in an engine having one or more cylinders in which combustion occurs. The system includes a sensor that detects the ionization of the combustion process in the cylinders. The ionization is related to the ... | 09/20/2005 |
| 6931914 | Combustion condition detection apparatus for an internal combustion engine A combustion condition detecting apparatus for an internal combustion engine has a current distributor that distributes an ion current, a band pass filter which extracts a knock vibration component from a current distributor output, a knock determination section whi... | 08/23/2005 |
| 6925987 | METHOD FOR SETTING A KNOCK DETERMINATION PERIOD IN AN INTERNAL COMBUSTION ENGINE, METHOD FOR SETTING A FUEL INJECTION TIMING IN AN INTERNAL COMBUSTION ENGINE, AND CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE Under engine operating conditions in which a default setting for a knock determination period overlaps with a fuel injection period during which fuel is injected by a fuel injector, the fuel injection timing and the knock determination period are set in correlation ... | 08/09/2005 |
| 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 |
| 6857416 | Knocking detecting device for automobile A knocking detecting device executes A/D conversion of a knock sensor signal every constant time ts and executes filter processing of the converted digital signal. The knocking detecting device determines whether the knocking arises or not according to the filter pr... | 02/22/2005 |
| 6845312 | Method for detecting engine knock A method for processing knock-related data reduces the memory locations required for the method and also simplify the processing steps needed to determine a sum, average, and threshold value relating to magnitudes of knock ratios. Inputs from either pressure sensor ... | 01/18/2005 |
| 6701894 | Knocking control apparatus for internal combustion engine The decision period in which an output of a knock sensor is extracted is set by a setting unit in response to an output of a crank angle sensor. The set decision period is stored in a storing unit and is changed by a changing unit 14 to contain the output... | 03/09/2004 |
| 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 |
| 6311672 | Device for controlling the knocking of an internal combustion engine A device for controlling knocking of an internal combustion engine featuring improved reliability by preventing signals of the knocking level from being erroneously detected as those of the noise level. The device detects an ionic current flowing through ... | 11/06/2001 |
| 5896842 | Closed-loop ignition timing control Internal combustion engine ignition timing control for timing combustion events of an air-fuel mixture in engine cylinders in response to cylinder mean effective pressure feedback information. Cylinder mean effective pressure information is provided throu... | 04/27/1999 |
| 5806489 | Method for returning to nominal advance when no pinging is detected The present invention relates to a method for returning to nominal advance. This method is put into practice in the context of a strategy of electronic control of an internal combustion engine when a phenomenon of pinging has been detected and a method of... | 09/15/1998 |
| 5694900 | Knock control system for an internal combustion engine A knock control system for an internal combustion engine which subjects a knock signal waveform superposed on an ionic current to pulse processing so as to improve a signal-to-noise (SN) ratio, thereby achieving higher reliability thereof without adding t... | 12/09/1997 |
| 5421304 | Internal combustion engine knock control system apparatus and method A knock control system and method for operation of a spark ignition internal combustion engine having short-term regulation with a relatively large regulating action, such that when knocking events occur, the value for an actual ignition point is reset in... | 06/06/1995 |
| 5165378 | Ignition timing control system for internal combustion engine An ignition timing control system for vehicle internal combustion engines, in which the basic ignition timing is determined for a detected engine speed and load and when knock occurs, the basic ignition timing is retarded by a unit amount. A counter is pr... | 11/24/1992 |
| 4770144 | Knock control apparatus and method for internal combustion engines A knock control apparatus for an internal combustion engine which prevents variation of a control knock sound even if an output of a knock sensor is varied due to the variations in performance among different engines or knock sensors, aging of the engine ... | 09/13/1988 |
| 4699106 | Knock control system for internal combustion engines A knock control system for an internal combustion engine has a knock discrimination level. If an output signal from a knock sensor is higher than the knock discrimination level, then the knock control system determines that the engine is subjected to knoc... | 10/13/1987 |
| 4675821 | Method and apparatus for detecting knocking An element is provided which operates in two selectable mode. The element converts the analog output of a knock sensor to a digital value in one mode and compares the analog output with the reference value in the other mode. The average output of the knoc... | 06/23/1987 |
| 4549514 | Method and apparatus for controlling knocking of an internal combustion engine Disclosed are method and apparatus for controlling knocking of an internal combustion engine by retarding an ignition timing in accordance with a knocking intensity of detected knocking and advancing the ignition timing at a predetermined velocity after t... | 10/29/1985 |
| 4466406 | Regulating device for control variables of an internal combustion engine A regulating device is proposed for control variables of an internal combustion engine, in particular for the fuel metering signal and the ignition signal, which has an intervention capability for signals of at least one knocking sensor on the engine via ... | 08/21/1984 |
| 4347820 | Process and apparatus for electronic angle of advance correction in response to pinging and engine charge A process and apparatus for electronic angle of advance correction in response to pinging and engine charge, which calculates and adjusts the optimization of the advance of an internal combustion engine by detecting pinging, including an integrator with a... | 09/07/1982 |
| 4333334 | Knocking discrimination apparatus A knocking discrimination apparatus in which an output signal derived from a knocking sensor is held at an almost constant level regardless of condition of an internal combustion engine by means of providing a control circuit therein for controlling the o... | 06/08/1982 |
| 4274379 | Method and system for controlling ignition timing of internal combustion engines A method for controlling the ignition timing of internal combustion engines in which the magnitude of knocking is detected for each of at least two different magnitude levels. A knocking signal representing the detected magnitude level of the knocking and... | 06/23/1981 |
| 4269154 | Ignition timing control system for internal combustion engines An ignition timing control system including a counter into which is introduced a data generated from a memory and indicative of the proper ignition advance corresponding to the operating conditions of an engine and the decrement or increment of the count ... | 05/26/1981 |
| 4269155 | Ignition timing control system for internal combustion engines An ignition timing control system for internal combustion engines includes a knock detecting circuit for determining the presence or absence of the knocking in response to a signal from a knock detector, and includes a correction advance computing circuit... | 05/26/1981 |
| 4261313 | Method of and apparatus for controlling ignition timing of an internal-combustion engine A method of and apparatus for controlling ignition timing of an internal-combustion engine in accordance with the degree of knocking, the apparatus comprising a knock detector for detecting a vibration corresponding to knocking of the internal-combustion ... | 04/14/1981 |
| 4153020 | Method and apparatus for spark control of engine knock Knocking sounds in an internal combustion engine are detected by a transducer, amplified, filtered to the knock frequencies, rectified and integrated to provide for each knock a DC pulse representative of the intensity of the knock. This DC pulse is fed t... | 05/08/1979 |
| 4133475 | Engine spark timing system with knock retard and wide open throttle advance In a spark ignition internal combustion engine with power output controlled by a throttle, a throttle switch provides a wide open throttle signal and a knock sensor provides a knock level signal. A normal spark pulse train, corrected for intake manifold v... | 01/09/1979 |
| 4120272 | Device for optimum control of the sparking time of a spark ignition engine, during its operation This device comprises, in combination, means generating a digital value equal to the difference between a number of cycles of the engine and the number of knockings detected during the period of said cycles and means controlling the spark advance point in... | 10/17/1978 |
| 4002155 | Engine and engine spark timing control with knock limiting etc. In a spark ignition internal combustion engine, an accelerometer is mounted on an engine component, preferably the intake manifold, and senses vibration including individual ringing vibrations due to engine knock or detonation. A reference signal is deriv... | 01/11/1977 |
