Asaura
Shinya Asaura, Mishima-Shi JP
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20100058741 | EXHAUST PURIFICATION DEVICE OF INTERNAL COMBUSTION ENGINE - In an internal combustion engine, an NO | 03-11-2010 |
20110047993 | EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - In an exhaust purification system of an internal combustion, comprising a NO | 03-03-2011 |
20110056188 | EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - The present invention provides an exhaust purification apparatus for an internal combustion engine which enables a decrease in NOx purification rate and possible ammonia slip to be inhibited. The apparatus includes an NOx catalyst, a urea aqueous solution addition valve serving as reducing agent adding means, and NOx sensors provided an inlet and an outlet of the NOx catalyst, respectively. When the bed temperature of the NOx catalyst is in a predetermined high-temperature region in which the amount of ammonia converted into NOx increases relatively and an NOx purification rate decreases relatively, the apparatus uses outputs from the NOx sensors to perform correction such that the actual addition amount of the urea aqueous solution addition valve reaches a target addition amount. | 03-10-2011 |
20110083429 | CATALYST PASSING COMPONENT DETERMINING APPARATUS AND EXHAUST PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - The present invention comprises a selective reduction type NOx catalyst located in an exhaust passage and being capable of purifying NOx with ammonia, an oxidation catalyst located downstream of the selective reduction type NOx catalyst, an upstream sensor located between the selective reduction type NOx catalyst and the oxidation catalyst and having ability to detect both ammonia and NOx, a downstream sensor located downstream of the oxidation catalyst and having ability to detect both ammonia and NOx, and determining means for determining a component passing through the selective reduction type NOx catalyst, based upon a relation between output of the upstream sensor and output of the downstream sensor. | 04-14-2011 |
20110271663 | EXHAUST PURIFYING DEVICE FOR INTERNAL COMBUSTION ENGINES - An exhaust purifying device for an internal combustion engine which can restrict an influence of a measurement error in a NOx sensor provided at the downstream side of a catalyst and can optimally maintain a NOx purifying rate. The device includes a catalytic converter carrying a selective catalytic reduction catalyst provided in an exhaust passage of the engine to selectively reduce nitrogen oxides, a urea water adding valve for adding urea water to the catalyst as a reducing agent, a NOx sensor provided at the downstream side of the catalyst, and an ECU for adjusting an addition amount of the urea water adding valve based upon output of the NOx sensor, wherein a urea water addition amount adjusting process is executed under a condition that a NOx amount to be generated in the engine increases. | 11-10-2011 |
Shinya Asaura, Shizuoka-Ken JP
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20100205940 | EXHAUST EMISSION CONTROL SYSTEM OF INTERNAL COMBUSTION ENGINE AND EXHAUST EMISSION CONTROL METHOD - In an exhaust emission control system of an internal combustion engine, a NOx selective reduction catalyst is disposed in an engine exhaust passage, and an aqueous solution of urea stored in an aqueous-urea tank is supplied to the NOx selective reduction catalyst so as to selectively reduce NOx. A NOx sensor is provided in the engine exhaust passage downstream of the NOx selective reduction catalyst for detecting the NOx conversion efficiency of the NOx selective reduction catalyst, and the concentration of aqueous urea in the aqueous-urea tank is estimated from the detected NOx conversion efficiency. The exhaust emission control system and method make it possible to detect the concentration of aqueous urea at reduced cost. | 08-19-2010 |
Shinya Asaura, Shizuoka JP
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20100115928 | AQUEOUS UREA SOLUTION FEED DEVICE OF AN INTERNAL COMBUSTION ENGINE - An internal combustion engine wherein when an aqueous urea solution should be fed from an aqueous urea solution feed valve ( | 05-13-2010 |
Shinya Asaura, Toyota-Shi JP
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20150143801 | DETERIORATION DETECTION SYSTEM FOR EXHAUST PURIFICATION APPARATUS - An object of the present invention is to detect deterioration of a selective reduction type catalyst early and improve a detection precision in a deterioration detection system for an exhaust gas purification apparatus including a selective reduction type catalyst disposed in an exhaust passage of an internal combustion engine, a reducing agent adding valve disposed in the exhaust passage upstream of the selective reduction type catalyst, and a NO | 05-28-2015 |
Shinya Asaura, Numazu-Shi, Shizuoka-Ken JP
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20150322836 | EXHAUST GAS PURIFICATION APPARATUS FOR INTERNAL COMBUSTION ENGINE - An object of the present invention is to allow a supply amount of a reducing agent to be an appropriate amount in an exhaust gas purification apparatus for an internal combustion engine comprising a selective catalytic reduction catalyst which is arranged for an exhaust gas passage of the internal combustion engine and a supply device which supplies the reducing agent to the selective catalytic reduction catalyst. In order to achieve the object, the present invention resides in an exhaust gas purification apparatus for an internal combustion engine comprising a selective catalytic reduction catalyst which is arranged for an exhaust gas passage of the internal combustion engine and a supply device which supplies a reducing agent to the selective catalytic reduction catalyst, wherein an amount of the reducing agent supplied from the supply device is adjusted on the basis of such a characteristic that a multiplied value, which is obtained by multiplying a flow rate of an exhaust gas allowed to flow into the selective catalytic reduction catalyst per unit time and a concentration of the reducing agent contained in the exhaust gas allowed to flow out from the selective catalytic reduction catalyst, correlates with a surplus reducing agent amount. | 11-12-2015 |
Shinya Asaura, Numazu-Shi JP
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20150328585 | EXHAUST GAS PURIFICATION APPARATUS FOR AN INTERNAL COMBUSTION ENGINE - An exhaust gas purification apparatus for an internal combustion engine includes an addition valve to add a precursor of ammonia or ammonia into an exhaust passage of the internal combustion engine, a sensor to detect NOx and ammonia at the upstream side of the addition valve, a channel cross section reducing part arranged at the downstream side of the addition valve, and a control device to limit the calculation of an amount of the precursor of ammonia or an amount of ammonia to be added from the addition valve based on a detection value of the sensor, or the calculation of a rate of NOx reduction based on the detection value of the sensor, in cases where a flow rate of exhaust gas flowing through the exhaust passage is equal to or more than a predetermined flow rate. | 11-19-2015 |