Patents by Inventor Junichi Matsuo
Junichi Matsuo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20140109767Abstract: A method of removing ash from a wall flow type particulate filter which is arranged in an exhaust passage of an internal combustion engine in which combustion is performed in an excess of oxygen for trapping particulate matter in exhaust gas, using a solid acid which is carried on the particulate filter, renders the state of the particulate filter a state where the exhaust gas which flows into the particulate filter is lowered in concentration of oxygen and the particulate filter is raised in temperature, and then renders the state of the particulate filter a state where the exhaust gas which flows into the particulate filter in an oxidizing atmosphere contains SOx.Type: ApplicationFiled: June 29, 2012Publication date: April 24, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroshi Otsuki, Shigeki Nakayama, Hiromasa Nishioka, Katsuhiko Oshikawa, Yoshihisa Tsukamoto, Junichi Matsuo, Yuichi Sobue, Daichi Imai, Kou Sugawara
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Patent number: 8701393Abstract: An internal combustion engine in which an SOx trap catalyst (13) for trapping SOx contained in the exhaust gas contains an oxygen adsorbing and releasing material (54) which can adsorb SO2 contained in the exhaust gas and an SOx storage material (55) which can store SOx in the form of sulfates. The SO2 which is contained in the exhaust gas is chemically adsorbed at the oxygen adsorbing and releasing material (54) without being oxidized. If the temperature of the SOx trap catalyst (13) becomes higher than the start temperature of adsorbed SO2 movement, the SO2 which is chemically adsorbed at the oxygen adsorbing and releasing material (54) is oxidized and stored in the form of sulfates in the SOx storage material (55).Type: GrantFiled: July 23, 2009Date of Patent: April 22, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takamitsu Asanuma, Yoshihisa Tsukamoto, Kazuhiro Umemoto, Junichi Matsuo, Hiromasa Nishioka
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Patent number: 8695399Abstract: The present detector for detecting sulfur components includes a storage portion for storing SOx and NOx in the exhaust gas passing through an exhaust passage, in which the more an amount of stored SOx increases, the more an amount of NOx that can be stored decreases, estimates the amount of stored SOx on the basis of an amount of NOx stored in the storage portion, and detects an integrated amount of SOx passing through the exhaust passage during a given period or an value on the basis of the integrated amount. In the present detector, the estimating of the amount of stored SOx for detecting the integrated amount of SOx or the value on the basis of the integrated amount is prohibited when a current amount of NOx that can be stored is not stored in the storage portion.Type: GrantFiled: December 9, 2009Date of Patent: April 15, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiromasa Nishioka, Yoshihisa Tsukamoto, Katsuhiko Oshikawa, Hiroshi Otsuki, Junichi Matsuo
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Patent number: 8621852Abstract: The present detector for detecting sulfur components includes a storage portion for storing SOx and NOx in the exhaust gas passing through an exhaust passage, in which the more an amount of stored SOx increases, the more an amount of stored NOx decreases, and which does not release SOx but release NOx at a set temperature, and a temperature sensor, estimates the amount of stored SOx on the basis of a relationship between, after the storage portion becomes the set temperature by heating, a heating pattern of the storage portion and temperature change of the storage portion measured by the temperature sensor, and detects an integrated amount of SOx passing through the exhaust passage during a given period or an value on the basis of the integrated amount.Type: GrantFiled: November 26, 2009Date of Patent: January 7, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Katsuhiko Oshikawa, Takamitsu Asanuma, Hiromasa Nishioka, Yoshihisa Tsukamoto, Hiroshi Otsuki, Junichi Matsuo, Kazuhiro Umemoto
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Publication number: 20130323130Abstract: An exhaust purification system in which when an air-fuel ratio of exhaust gas is leaner than a stoichiometric air-fuel ratio, a silver-alumina-based catalyst device releases adsorbed NO2 at a first set temperature and releases adsorbed NO at a second set temperature which is lower than the first set temperature. When the air-fuel ratio of the exhaust gas is leaner than the stoichiometric air-fuel ratio and the silver-alumina-based catalyst device is a third set temperature which is lower than the second set temperature, a temperature rise of the silver-alumina-based catalyst device is suppressed to maintain the silver-alumina-based catalyst device near the third set temperature, and at least part of the NO which is adsorbed at the silver-alumina-based catalyst device is oxidized to NO2 to be adsorbed at the silver-alumina-based catalyst device, then the suppression of the temperature rise of the silver-alumina-based catalyst device is lifted.Type: ApplicationFiled: February 18, 2011Publication date: December 5, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Junichi Matsuo, Hiromasa Nishioka, Katsuhiko Oshikawa, Yoshihisa Tsukamoto, Hiroshi Otsuki, Shigeki Nakayama
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Publication number: 20130315791Abstract: An exhaust purification system of an internal combustion engine of the present invention comprises a silver-alumina-based catalyst device arranged in the engine exhaust system. When a temperature of the silver-alumina-based catalyst device becomes a second set temperature T2 lower than a first set temperature T1 at which the silver-alumina-based catalyst device releases NO2, and releases NO, the silver-alumina-based catalyst device is heated such that a temperature elevation rate thereof is increased to make the temperature T of the silver-alumina-based catalyst device be a third set temperature T3 between the first set temperature T1 and the second set temperature T2.Type: ApplicationFiled: February 14, 2011Publication date: November 28, 2013Inventors: Yoshihisa Tsukamoto, Hiromasa Nishioka, Katsuhiko Oshikawa, Hiroshi Otsuki, Junichi Matsuo, Shigeki Nakayama
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Patent number: 8590293Abstract: The exhaust purification system of an internal combustion engine of the present invention is provided with an NOX storage reduction catalyst and a particulate filter which is arranged at the upstream side of the NOX storage reduction catalyst. When causing the NOX storage reduction catalyst to release the stored NOX, the particulate filter is raised to the temperature at which the particulate matter is oxidized, the flow rate of the exhaust gas which flows into the particulate filter is made to decrease, the air-fuel ratio of the exhaust gas which flows into the particulate filter is made rich, and the particulate matter which builds up on the particulate filter is made to oxidize to produce carbon monoxide.Type: GrantFiled: October 21, 2009Date of Patent: November 26, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiromasa Nishioka, Yoshihisa Tsukamoto, Kazuhiro Umemoto, Junichi Matsuo
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Patent number: 8555699Abstract: A detector for detecting sulfur components having a storage portion for storing SOX and NOX in the exhaust gas passing through an exhaust passage and a temperature sensor for measuring a temperature of the storage portion. The detector includes a heater for heating the storage portion and determines the current heat capacity (C) of the storage portion on the basis of an increase in (T2?T1) the temperature of the storage portion measured by the temperature sensor and a quantity of heat (QH) generated by the heater when the heater heats the storage portion.Type: GrantFiled: May 12, 2010Date of Patent: October 15, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroshi Otsuki, Hiromasa Nishioka, Katsuhiko Oshikawa, Yoshihisa Tsukamoto, Junichi Matsuo
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Publication number: 20130243658Abstract: In an internal combustion engine, inside of an engine exhaust passage, an NOx adsorption part and an NOx purification part are arranged. The NOx purification part has the property of reducing NOx which is contained in exhaust gas if the concentration of hydrocarbons is made to vibrate by within a predetermined range of amplitude and within a predetermined range of period. When NOx is to be desorbed from the NOx adsorption part, the current NOx which is contained in the exhaust gas and the NOx which is desorbed from the NOx adsorption part are reduced by making the concentration of hydrocarbons of the NOx purification part vibrate by the amplitude and period which are set for the current engine operating state, at least of which (?T·k) has been corrected so that the amount of hydrocarbons becomes greater.Type: ApplicationFiled: December 6, 2010Publication date: September 19, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshihisa Tsukamoto, Hiromasa Nishioka, Kohei Yoshida, Yuki Bisaiji, Junichi Matsuo, Takamitsu Asanuma
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Patent number: 8465702Abstract: In an exhaust purification system of an internal combustion engine of the present invention, a silver-alumina-based catalyst device and NOX reducing catalyst device are arranged in the engine exhaust system. When a temperature of the silver-alumina-based catalyst device becomes a first set temperature T1 on the high temperature side, NOX released from the silver-alumina-based catalyst device is reduced by reducing material to be purified in the NOX reducing catalyst device. When the temperature of the silver-alumina-based catalyst device becomes a second set temperature on the low temperature side, NOX released from the silver-alumina-based catalyst device is reduced by reducing material to be purified in the NOX reducing catalyst device.Type: GrantFiled: May 12, 2010Date of Patent: June 18, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yoshihisa Tsukamoto, Hiromasa Nishioka, Katsuhiko Oshikawa, Hiroshi Otsuki, Junichi Matsuo
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Publication number: 20130121885Abstract: In an internal combustion engine, inside of an engine exhaust passage, a hydrocarbon feed valve (15) and an exhaust treatment catalyst (13) are arranged. On a substrate (45) of the exhaust treatment catalyst (13), a coat layer comprised of at least two layers of a top coat layer (46) and a bottom coat layer (47) is formed. The top coat layer (46) is comprised of an exhaust purification catalyst for reacting NOx contained in exhaust gas and reformed hydrocarbons, while the bottom coat layer (47) is comprised of an NOx absorption catalyst. The concentration of hydrocarbons which flows into the exhaust treatment catalyst (13) is made to vibrate within a predetermined range of amplitude and within a predetermined range of period. Due to this, NOx contained in exhaust gas and NOx desorbed from the NOx absorption catalyst (47) are reduced in the exhaust purification catalyst (46).Type: ApplicationFiled: July 28, 2010Publication date: May 16, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiromasa Nishioka, Kohei Yoshida, Yoshihisa Tsukamoto, Yuki Bisaiji, Junichi Matsuo, Takamitsu Asanuma
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Patent number: 8388893Abstract: A combined detector capable of simultaneously detecting both a value indicating a physical/chemical phenomenon such as a pH value and the intensity of an energy beam such as light. The combined detector comprises a physical/chemical phenomenon detecting system (10) and an energy beam detecting system. The physical/chemical phenomenon detecting system (10) has a sensing section (21) whose potential varies with a physical/chemical phenomenon, a charge supply section (22) for supplying first charge to the sensing section, a charge supply control section (23) provided between the sensing section (21) and the charge supply section (22), a first charge storage section (26) for storing the first charge transferred from the sensing section (21), and a charge transfer control section (27) provided between the sensing section (21) and the first charge storage section (26).Type: GrantFiled: December 19, 2008Date of Patent: March 5, 2013Assignee: National University Corporation Toyohashi University of TechnologyInventors: Kazuaki Sawada, Junichi Matsuo, Hirokazu Nakazawa
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Publication number: 20130052087Abstract: In an exhaust purification system of an internal combustion engine of the present invention, a silver-alumina-based catalyst device and NOX reducing catalyst device are arranged in the engine exhaust system. When a temperature of the silver-alumina-based catalyst device becomes a first set temperature TI on the high temperature side, NOX released from the silver-alumina-based catalyst device is reduced by reducing material to be purified in the NOX reducing catalyst device. When the temperature of the silver-alumina-based catalyst device becomes a second set temperature on the low temperature side, NOX released from the silver-alumina-based catalyst device is reduced by reducing material to be purified in the NOX reducing catalyst device.Type: ApplicationFiled: May 12, 2010Publication date: February 28, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshihisa Tsukamoto, Hiromasa Nishioka, Katsuhiko Oshikawa, Hiroshi Otsuki, Junichi Matsuo
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Publication number: 20130042667Abstract: A detector for detecting sulfur components having a storage portion for storing SOX and NOX in the exhaust gas passing through an exhaust passage and a temperature sensor for measuring a temperature of the storage portion. The detector includes a heater for heating the storage portion and determines the current heat capacity (C) of the storage portion on the basis of an increase in (T2?T1) the temperature of the storage portion measured by the temperature sensor and a quantity of heat (QH) generated by the heater when the heater heats the storage portion.Type: ApplicationFiled: May 12, 2010Publication date: February 21, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroshi Otsuki, Hiromasa Nishioka, Katsuhiko Oshikawa, Yoshihisa Tsukamoto, Junichi Matsuo
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Publication number: 20120279278Abstract: The present detector for detecting sulfur components includes a storage portion for storing SOx and NOx in the exhaust gas passing through an exhaust passage, in which the more an amount of stored SOx increases, the more an amount of NOx that can be stored decreases, estimates the amount of stored SOx on the basis of an amount of NOx stored in the storage portion, and detects an integrated amount of SOx passing through the exhaust passage during a given period or an value on the basis of the integrated amount. In the present detector, the estimating of the amount of stored SOx for detecting the integrated amount of SOx or the value on the basis of the integrated amount is prohibited when a current amount of NOx that can be stored is not stored in the storage portion.Type: ApplicationFiled: December 9, 2009Publication date: November 8, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiromasa Nishioka, Yoshihisa Tsukamoto, Katsuhiko Oshikawa, Hiroshi Otsuki, Junichi Matsuo
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Publication number: 20120222405Abstract: The present detector for detecting sulfur components includes a storage portion for storing SOx and NOx in the exhaust gas passing through an exhaust passage, in which the more an amount of stored SOx increases, the more an amount of stored NOx decreases, and which does not release SOx but release NOx at a set temperature, and a temperature sensor, estimates the amount of stored SOx on the basis of a relationship between, after the storage portion becomes the set temperature by heating, a heating pattern of the storage portion and temperature change of the storage portion measured by the temperature sensor, and detects an integrated amount of SOx passing through the exhaust passage during a given period or an value on the basis of the integrated amount.Type: ApplicationFiled: November 26, 2009Publication date: September 6, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Katsuhiko Oshikawa, Takamitsu Asanuma, Hiromasa Nishioka, Yoshihisa Tsukamoto, Hiroshi Otsuki, Junichi Matsuo, Kazuhiro Umemoto
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Publication number: 20120216516Abstract: An internal combustion engine in which an SOx trap catalyst for trapping SOx contained in the exhaust gas is comprised of an upstream side catalyst and a downstream side catalyst into which the exhaust gas flowing out from the upstream side catalyst flows. The SOx storing material of the upstream side catalyst is mainly comprised of an alkali earth metal, while the SOx storing material of the downstream side catalyst is mainly comprised of an alkali metal.Type: ApplicationFiled: October 6, 2009Publication date: August 30, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiromasa Nishioka, Yoshihisa Tsukamoto, Kazuhiro Umemoto, Junichi Matsuo, Takamitsu Asanuma
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Publication number: 20120198824Abstract: The exhaust purification system of an internal combustion engine of the present invention is provided with an NOX storage reduction catalyst and a particulate filter which is arranged at the upstream side of the NOX storage reduction catalyst. When causing the NOX storage reduction catalyst to release the stored NOX, the particulate filter is raised to the temperature at which the particulate matter is oxidized, the flow rate of the exhaust gas which flows into the particulate filter is made to decrease, the air-fuel ratio of the exhaust gas which flows into the particulate filter is made rich, and the particulate matter which builds up on the particulate filter is made to oxidize to produce carbon monoxide.Type: ApplicationFiled: October 21, 2009Publication date: August 9, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiromasa Nishioka, Yoshihisa Tsukamoto, Kazuhiro Umemoto, Junichi Matsuo
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Publication number: 20120180462Abstract: An exhaust purification system of an internal combustion engine has a selective reduction type NOX catalyst device which can hold ammonia and a storage reduction type NOX catalyst device which is arranged at an upstream side of the selective reduction type NOX catalyst device, which makes an air-fuel ratio of exhaust gas which flows into the storage reduction type NOX catalyst device change from a lean air-fuel ratio to a rich air-fuel ratio for starting an ammonia generation period, and which makes an air-fuel ratio of exhaust gas which flows into the storage reduction type NOX catalyst device change from a rich air-fuel ratio to a lean air-fuel ratio for ending the ammonia generation period.Type: ApplicationFiled: October 9, 2009Publication date: July 19, 2012Applicant: Toyota Jidosha Kabushiki KaishaInventors: Takamitsu Asanuma, Hiromasa Nishioka, Yoshihisa Tsukamoto, Junichi Matsuo, Kazuhiro Umemoto
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Publication number: 20120110987Abstract: An internal combustion engine in which an SOx trap catalyst (13) for trapping SOx contained in the exhaust gas contains an oxygen adsorbing and releasing material (54) which can adsorb SO2 contained in the exhaust gas and an SOx storage material (55) which can store SOx in the form of sulfates. The SO2 which is contained in the exhaust gas is chemically adsorbed at the oxygen adsorbing and releasing material (54) without being oxidized. If the temperature of the SOx trap catalyst (13) becomes higher than the start temperature of adsorbed SO2 movement, the SO2 which is chemically adsorbed at the oxygen adsorbing and releasing material (54) is oxidized and stored in the form of sulfates in the SOx storage material (55).Type: ApplicationFiled: July 23, 2009Publication date: May 10, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takamitsu Asanuma, Yoshihisa Tsukamoto, Kazuhiro Umemoto, Junichi Matsuo, Hiromasa Nishioka