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| Number | Title | Issue Date |
| 7603981 | Improper fuel mixing determining apparatus for internal combustion engine If improper fuel (light oil or kerosene) is mixed into fuel (gasoline) supplied to the engine, a knock limit of an ignition timing is retarded. Based on such a characteristic, every when knocking is detected based on a detection signal from a knock sensor, the ignit... | 10/20/2009 |
| 7383816 | Virtual fuel quality sensor A method of operating a multiple combustion chamber internal combustion engine includes advancing an ignition timing of a first subset of the combustion chambers from an operating ignition timing until a knock event is detected while concurrently operating the remai... | 06/10/2008 |
| 7331327 | Zone based knock reduction systems and methods for belt alternator starter hybrid systems A knock reduction system for an internal combustion engine is provided. The system includes an engine operating zone selection module that selects a current engine operating zone from a plurality of engine operating zones based on engine speed, air per cylinder, and... | 02/19/2008 |
| 7255089 | Engine control device and control method A determination is made as to whether or not knocking is actually occurring inside a combustion chamber (5), and on the basis of the knocking detection result, a knocking-correlated parameter (octane number, alcohol concentration, compression ratio of the eng... | 08/14/2007 |
| 7246596 | Control system for internal combustion engine A control system for an internal combustion engine that has at least one fuel injection valve for injecting fuel into a combustion chamber of the engine, and burns the injected fuel by compressing an air-fuel mixture in the combustion chamber. An operating condition... | 07/24/2007 |
| 7233856 | Internal combustion engine and control method therefor An internal combustion engine and control method therefor in which the engine is selectively started by combustion without cranking. The temperature in the combustion chamber of an engine cylinder is stabilized upon starting of the engine, thereby allowing secured s... | 06/19/2007 |
| 7210455 | Engine control with fuel quality sensor A system is described using a fuel quality sensor for controlling various aspects of engine operation. In particular, an acoustic wave sensor is utilized to measure viscosity and density of gasoline fuels. This measurement is utilized to predict engine combustion qu... | 05/01/2007 |
| 7201138 | Control system for internal combustion engine A control system used with an engine determines a fuel injection timing according to a detected engine operating condition and fuel injection is executed through a fuel injection valve. The target ignition timings of the fuel are set according to the detected engine... | 04/10/2007 |
| 7194987 | Internal combustion engine driven with change-over of compression ratio, air-fuel ratio, and boost status With an increase in torque demand, the internal combustion engine of the invention successively changes over a combination of a compression ratio, an air-fuel ratio, and a boost status of an air-fuel mixture from (1) settings of a high compression ratio, a lean air-... | 03/27/2007 |
| 7185631 | Combustion control system and method for direct-injection spark-ignition internal combustion engine There is provided a combustion control system for a direct-injection spark-ignition internal combustion engine, including a fuel injection valve that injects fuel directly into a cylinder of the engine to form an air-fuel mixture in a combustion chamber of the engin... | 03/06/2007 |
| 7178503 | System and method to pre-ignition in an internal combustion engine An engine system and method are disclosed for controlling pre-ignition of an alcohol fuel. In one embodiment, the fuel injection timing is adjusted to cause the fuel to avoid combustion chamber surfaces. In another embodiment, the fuel injection timing is adjusted t... | 02/20/2007 |
| 7159565 | Method of controlling ignition timing in internal combustion engine An internal combustion engine includes an in-cylinder injector injecting a fuel into a cylinder and an intake port injector injecting a fuel into an intake port. In the internal combustion engine, when a fuel injection ratio between the in-cylinder injector and the ... | 01/09/2007 |
| 7152560 | Engine valve performance controller A valve performance controller for use in an engine that performs ignition timing retardation control to prevent knocking. The controller variably controls valve performance of an intake valve in accordance with an operation state of the engine. The controller corre... | 12/26/2006 |
| 7092812 | Control method and device for an internal combustion engine A control method for an internal combustion engine provides for the acquisition of a signal correlated with the vibrations transmitted by at least one component of the internal combustion engine moving between two end positions; the vibrations are transmitted by the... | 08/15/2006 |
| 7077105 | Spark ignition internal combustion engine A low-octane fuel and a high-octane fuel stored in a low-octane fuel tank (5) and a high-octane fuel tank (7), both having known octane numbers, are injected from fuel injection valves (13a, 13b) into an intake port (12 | 07/18/2006 |
| 7032571 | Internal combustion engine controller From the start of the engine to the detection of an engine speed peak, a control parameter (e.g., ignition timing) different from an air intake rate relating to an engine output is set to a value at which the engine output decreases than at an idling value. After de... | 04/25/2006 |
| 7021285 | Control device for internal combustion engine A combustion variation value is detected, and a function that uses the detected combustion variation value is added to CVAR(i−1) to obtain CVAR(i); and using the resulting value, an exhaust gas recirculation amount and an ignition timing are obtained. A combustion... | 04/04/2006 |
| 6990955 | Spark ignition engine There is provided a spark ignition engine having a low RON fuel tank to store a low RON fuel and a high RON fuel tank to store a high RON fuel, which can detect storage failure. It is judged that the two kinds of fuels are properly stored when differences between th... | 01/31/2006 |
| 6988484 | Fuel fill based spark knock control A method for reducing the magnitude of a knock retard angle in a vehicle having a quantity of fuel and a system for determining the quantity of fuel. The method determines a previous fuel quantity and a present fuel quantity, determines from said present fuel quanti... | 01/24/2006 |
| 6968825 | Control device for spark-ignition engine A control device for a spark-ignition engine, in which a mixture in a combustion chamber is fired by compression ignition in a part-load range under warm-running conditions, includes an EGR controller incorporating a valve operation controller for controlling intern... | 11/29/2005 |
| 6925972 | Internal combustion engine driven with change-over of compression ratio, air-fuel ratio, and boost status With an increase in torque demand, the internal combustion engine of the invention successively changes over a combination of a compression ratio, an air-fuel ratio, and a boost status of an air-fuel mixture from (1) settings of a high compression ratio, a lean air-... | 08/09/2005 |
| 6600322 | Stroke distinction in 4-cycle engines without a cam reference Methods, apparatus, and systems for distinguishing between compression and exhaust strokes of a four-cycle engine is provided. A first ionization time of a spark plug for a known cylinder is measured on a first engine stoke. A second ionization time of th... | 07/29/2003 |
| 6496750 | System and method for processing crank angle signals Disclosed is a system and method for processing crank angle signals. The system comprises a crank angle sensor for converting a rotation of a crankshaft into analog signals; a switching circuit for converting the analog signals into crank angle signals; a... | 12/17/2002 |
| 6412472 | Method for correcting ignition advance of an internal combustion The present invention is a method of ignition advance correction of an internal-combustion engine according to the composition variation of the natural gas contained in a tank and supplying the engine. A methane number relative to the natural gas filling ... | 07/02/2002 |
| 6073611 | Control apparatus for internal combustion engine A control apparatus for an internal combustion engine comprises: driving state detecting means for detecting a driving state of the internal combustion engine based on detected information from various sensors; control calculating means for calculating a ... | 06/13/2000 |
| 5845620 | Ignition timing control system for internal combustion engine An ignition timing control system for an internal combustion engine that estimates the octane number of the fuel being used based on the state of engine combustion knocking and controls the ignition timing to a value not exceeding the knocking limit. The ... | 12/08/1998 |
| 5531200 | Control apparatus for engine An engine control apparatus includes a microcomputer and receives a signal from a signal source which generates a signal containing a control factor. The microcomputer executes a control program in response to the received signal. The engine control appar... | 07/02/1996 |
| 5235952 | Ignition timing control system for internal combustion engines An ignition timing control system for an internal combustion engine includes an ECU which calculates a knocking correction value in response to an output from a knocking sensor, and an advance limit value in response to engine operating conditions. The EC... | 08/17/1993 |
| 5235953 | Ignition timing control system for internal combustion engines An ignition timing control system for an internal combustion engine includes an ECU which calculates a knocking correction value in response to an output from a knocking sensor, and an advance limit value in response to engine operating conditions. The EC... | 08/17/1993 |
| 5233962 | Knock strategy including high octane spark advance A method is provided for controlling knock on an internal combustion engine. The method includes the steps of determining a maximum value of knock and determining whether conditions are right for updating the maximum value of knock. The method also includ... | 08/10/1993 |
| 5133322 | Internal combustion engine ignition system and cleaning device An apparatus for electrically controlling the spark advance of selected cylinders of a multicylinder engine so that the spark of the selected cylinders is advanced beyond others of the cylinders. For example, the selected cylinders may be advanced beyond ... | 07/28/1992 |
| 5012782 | Engine control system An engine control system for an internal combustion system changes an initially set control value either to a specified control value suitable for a grade of gasoline having a low octane rating when an engine operating condition is in a first operating zo... | 05/07/1991 |
| 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 |
| 4913117 | Control apparatus of an internal combustion engine A control apparatus of an internal combustion engine which has an air-fuel ratio adjusting device for adjusting the air-fuel ratio of an air-fuel mixture, and an ignition device for igniting the air-fuel mixture. When a knock sensor detects a knocking sta... | 04/03/1990 |
| 4858580 | Knocking control system for internal combustion engine A knocking control system for an internal combustion engine comprising knocking detector for detector an occurrence of a knocking, first control element for controlling a combustion in an engine combustion chamber based on signals from the knocking detect... | 08/22/1989 |
| 4856481 | Engine knocking control unit A unit for suppressing knocking in a gasoline engine includes a knocking sensor for sensing knocking and outputting a signal indicative thereof, engine control means for controlling the operating condition of the engine, control variable correcting means ... | 08/15/1989 |
| 4854286 | Device for adapting the air/fuel metering system and the ignition system of an internal combustion engine to enable the engine to run with all normally available grades of petrol (gasoline) fuel The invention refers to a device for adapting the fuel/air metering system and the ignition system of an internal combustion engine to enable the engine to be operated with all normally available grades of petrol (gasoline). The invention provides for a m... | 08/08/1989 |
| 4821697 | Fuel octane evaluation system A system and method for optimizing the octane rating of fuel supplied to a vehicle. The system utilizes information resulting from the occurance of detonation to make recommendations regarding the fuel octane requirements of the vehicle to the operator of... | 04/18/1989 |
| 4708113 | Method of discriminating octane number of fuel for motor vehicle Knocking in an engine is prevented from occurring by retarding an ignition timing. A basic ignition advance angle THB and a correction value THK for retardation of the ignition timing are computed in order that the ignition timing THF is calculated by usi... | 11/24/1987 |
| 4640251 | Method of discriminating octane number of fuel for motor vehicle A knocking in an engine is prevented from occurring by retarding an ignition timing. A basic ignition advance angle THB and a correction value THK for retardation of the ignition timing are computed in order that the ignition timing THF is calculated by u... | 02/03/1987 |
