| Patent application number | Description | Published |
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| 20100192543 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust passage of an internal combustion engine is provided with an upstream side three-way catalyst capable of purifying exhaust gas and a particulate filter (PM filter) for trapping particulate matter PM contained in exhaust gas. Catalyst warm-up control is exercised for the purpose of warming up mainly the upstream side three-way catalyst at cold start. Filter regeneration control for removing the particulate matter PM accumulating on the particulate filter from the filter is exercised at the cold start after the catalyst warm-up control is exercised. | 08-05-2010 |
| 20100192883 | VARIABLE VALVE APPARATUS - A first overlap amount that is an overlap amount of overlap between an intake valve opening timing and an exhaust valve opening timing, is calculated based on rotation speed of an internal combustion engine, load on the engine, and temperature of a working fluid. A second overlap amount that is the overlap amount that is set so that the relative rotation phase of at least one of the intake-side camshaft and the exhaust-side camshaft relative to the rotation phase of the crankshaft is fixed when the engine stops, is calculated based on the temperature of the working fluid. The overlap amount is set to equal to the second overlap amount, if the first overlap amount is larger than the second overlap amount. The overlap amount is set to equal to the first overlap amount, if the first overlap amount is less than or equal to the second overlap amount. | 08-05-2010 |
| 20100222986 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - An exhaust valve early-closure control brings about blowback of exhaust gas into an intake system. However, if the exhaust valve early-closure control is executed, for example, during a first idle operation immediately following the startup of the engine, or the like, the amount of blowback exhaust gas becomes excessively large. Therefore, when the post-startup increase amount has decreased to or below a lower-limit criterion value, the ECU prohibits the exhaust valve early-closure control, and changes the control to a usual valve timing control. As a result, during a period during which the combustion state has a stability margin and the amount of emission of HCs and the like is large, the exhaust emission quality can be bettered by the exhaust valve early-closure control. Besides, when the post-startup increase amount has decreased, the combustion state can be stabilized by prohibiting the exhaust valve early-closure control. | 09-02-2010 |
| 20100236227 | HYDRAULIC SYSTEM CONTROL DEVICE AND VALVE TIMING CONTROL DEVICE - When a hydraulic pressure generation source begins to generate hydraulic pressure, the present invention measures the hydraulic pressure in an oil supply line connected to a hydraulic actuator, and sets a viscosity index value indicating an oil viscosity in accordance with the pace at which the measured hydraulic pressure rises. The viscosity index value is calculated and set so that the slower the pace at which the measured hydraulic pressure rises, the higher the viscosity indicated by the viscosity index value. | 09-23-2010 |
| 20100294245 | SPARK IGNITION TYPE INTERNAL COMBUSTION ENGINE - Disclosed is a spark ignition type internal combustion engine, which comprises a variable compression ratio mechanism capable of changing a mechanical compression ratio, and a variable valve timing mechanism capable of controlling the closing timing of an intake valve. The intake air flow to be fed to the inside of a combustion chamber is controlled mainly by changing the closing timing of an intake valve so that the mechanical compression ratio is set higher at an engine low-load miming time than that at an engine high-load running time. The mechanical compression ratio at the engine low-load running time before completion of the warm-up of the internal combustion engine is set lower than that at the engine low-load running time after completion of the warm-up of the internal combustion engine. Although the expansion ratio at the engine low-load running time is raised to improve the mileage, it is possible at an engine cold start to heat an exhaust purifying catalyst promptly and to suppress the deterioration of an exhaust emission. | 11-25-2010 |
| Patent application number | Description | Published |
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| 20090013772 | METHOD FOR DETERMINING COMBUSTION STATE OF INTERNAL COMBUSTION ENGINE - The invention relates of a method for determining a combustion state of an internal combustion engine, for detecting an ion current generated within a combustion chamber of the internal combustion engine, including the steps of measuring a characteristic value of the ion current detected during a period that the ion current is generated and a generation period in which the ion current is generated, and determining a combustion state on the basis of a relation between the characteristic value and the generation period with respect to an elapsed time from an ignition, and the method comprises determining that the combustion state is normal, by setting a determination reference to be larger with respect to the characteristic value and shorter with respect to the generation period, in the case that the elapsed time from the ignition is short, and determining that the combustion is normal, by setting the determination reference to be smaller with respect to the characteristic value and longer with respect to the generation period in correspondence that the elapsed time from the ignition becomes longer. | 01-15-2009 |
| 20100154509 | METHOD FOR DETERMINING AIR FUEL RATIO OF INTERNAL COMBUSTION ENGINE ON THE BASIS OF ION CURRENT - In a method for determining an air fuel ratio of an internal combustion engine on the basis of an ion current, for detecting an ion current generated per ignition within a combustion chamber of the internal combustion engine, the method measures a generation period in which the ion current is greater than a determination value set as long as the ion current is generated, computes a divisor for computing a rate of fluctuation of the generation period of the ion current on the basis of a plurality of measured generation periods, computes the rate of fluctuation of the generation period of the ion current by weighing in a direction of increasing the computed divisor, and determines that an air fuel ratio is excessively high in the case that the calculated rate of fluctuation is equal to or more than a predetermined value. | 06-24-2010 |
