Akio Matsunaga
Akio Matsunaga, Miyoshi-Cho JP
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20110054762 | EXHAUST GAS RECIRCULATION APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - A technique is provided which, in an exhaust gas recirculation apparatus for an internal combustion engine, can calculate a low-pressure EGR rate and a high-pressure EGR rate in an accurate manner, and control the flow rates of both a low pressure EGR passage and a high pressure EGR passage in a closed-loop control manner, thereby to make the temperature of intake air and a supercharging pressure stable and to suppress the deterioration of exhaust emissions as well as the deterioration of power performance. The low pressure EGR rate, representative of the proportion of an amount of low pressure EGR gas to an amount of intake air sucked into the internal combustion engine, and the high pressure EGR rate, representative of the proportion of an amount of high pressure EGR gas to the amount of intake air, are calculated by using a CO | 03-03-2011 |
Akio Matsunaga, Toyota-Shi JP
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20110005491 | FUEL INJECTION CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - In one embodiment, a total pilot injection amount is calculated from the difference between a compressed gas temperature in a cylinder and a fuel self-ignition temperature. As pilot injection, a plurality of instances of divided pilot injection are performed, and by setting the injection amount per one instance of divided pilot injection to an injector minimum limit injection amount, each divided pilot injection amount is suppressed, and the penetration of fuel is suppressed to a low level so that attachment of fuel to a wall face is avoided, and also, fuel is caused to accumulate in the center portion of the cylinder. | 01-13-2011 |
Akio Matsunaga, Nishikamo-Gun JP
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20100319444 | CETANE NUMBER ESTIMATION METHOD - A cetane number estimation method is provided in which: the preliminary injection is preformed multiple times at different compression end temperatures with a fuel tank ( | 12-23-2010 |
Akio Matsunaga, Miyoshi-Shi JP
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20100305833 | FUEL INJECTION CONTROL APPARATUS OF INTERNAL COMBUSTION ENGINE - In one embodiment, a determination is made of whether or not in a condition in which a compressed gas temperature will reach a fuel self-ignition temperature by only a compression operation in the compression stroke, and in a case where the compressed gas temperature will reach the fuel self-ignition temperature, pilot injection is judged to be unnecessary, so this pilot injection is prohibited. | 12-02-2010 |
Akio Matsunaga, Aichi-Ken JP
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20100000213 | EXHAUST GAS CONTROL SYSTEM FOR INTERNAL COMBUSTION ENGINE AND METHOD FOR CONTROLLING THE SAME - An exhaust gas control system for an internal combustion engine includes a turbocharger that includes a compressor arranged in an intake passage, and a turbine arranged in an exhaust passage; a low-pressure EGR unit that recirculates a portion of exhaust gas back to the internal combustion engine through a low-pressure EGR passage that provides communication between the exhaust passage, at a portion downstream of the turbine, and the intake passage, at a portion upstream of the compressor; a low-pressure EGR valve that is provided in the low-pressure EGR passage, and that changes the flow passage area of the low-pressure EGR passage; and a valve control unit that executes an opening/closing control over the low-pressure EGR valve. When it is determined that the internal combustion engine is under a predetermined low-temperature environment, the low-pressure EGR valve is kept closed while the internal combustion engine is in the fuel-supply cutoff operation mode. | 01-07-2010 |
20100179745 | EXHAUST GAS RECIRCULATION DEVICE OF INTERNAL COMBUSTION ENGINE, AND CONTROL METHOD FOR THE DEVICE - An exhaust gas recirculation device of an internal combustion engine ( | 07-15-2010 |
20100199639 | EXHAUST-GAS RECIRCULATION APPARATUS AND EXHAUST-GAS RECIRCULATION FLOW RATE ESTIMATION METHOD FOR INTERNAL COMBUSTION ENGINES - An exhaust-gas recirculation apparatus for an internal combustion engine has a high-pressure EGR passage ( | 08-12-2010 |
20100300068 | EXHAUST GAS SENSOR CONTROL SYSTEM AND CONTROL METHOD - In an exhaust gas sensor control system and control method, the exhaust pipe wall temperature is estimated based on the measured exhaust gas temperature measured, the exhaust gas flowrate, and the measured outside air temperature, with reference to a supplied heat quantity calculation map, wall temperature added value map, and a wall temperature subtracted value map. Then the dew-point of the exhaust pipe is calculated based on the air-fuel ratio of the air flow amount to the weight of fuel, and a condensed water added amount is calculated based on the relative wall temperature and the exhaust gas flow amount. The amount of condensed water is then estimated by summing the calculated condensed water added amounts. | 12-02-2010 |
Akio Matsunaga, Shizuoka JP
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20090043428 | Acceleration Sensation Evaluating Device and Vehicle Controller - The present invention provides an acceleration sensation evaluating device that evaluates a sensory acceleration of a driver with respect to an expectation value of acceleration, and a vehicle controller that controls a vehicle according to the evaluation results. The evaluation device detects an amount of operation of the vehicle by the driver of when the vehicle is accelerated, detects an amount of vehicle behavior, computes a physical quantity of an expectation value indicating the expectation value of an acceleration performance which the driver expects based on the detected values, computes a sensory physical quantity indicating a sensation of the acceleration which the driver senses, and computes an evaluation value of the acceleration sensation based on difference or ratio between the physical quantity of the expectation value and the sensory physical quantity. | 02-12-2009 |
Akio Matsunaga, Shizuoka-Ken JP
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20080275627 | Fuel Injection Control Device for Internal Combustion Engine - The invention provides a fuel injection control device for an internal combustion engine that can improve the accuracy of combustion control regarding smoke suppression. The fuel injection control device is applied to an engine provided with an EGR device for returning, as a part of an intake gas flown into the cylinder, an EGR gas, withdrawn from an exhaust passage, to an air intake passage. The amount of oxygen OXM contained in the intake gas and the concentration of oxygen OXC contained in the intake gas are detected (steps S | 11-06-2008 |