Patents by Inventor Kenji Furui
Kenji Furui 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).
-
Patent number: 11939855Abstract: A diverting agent and method for temporarily filling fractures. The diverting agent contains a powder-like polyvinyl alcohol-based resin (P1) and a pellet-like polyvinyl alcohol-based resin (P2), and has an adsorption coefficient kc of 0.01 or more and 1 or less.Type: GrantFiled: April 20, 2023Date of Patent: March 26, 2024Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Shusaku Mandai, Yasuhiro Hirano, Yuya Kanamori, Kenji Furui, Keito Ikebata, Tomoki Onishi
-
Publication number: 20230407776Abstract: An exhaust gas control apparatus for the internal combustion engine includes a catalyst disposed in an exhaust passage, an upstream air-fuel ratio sensor configured to detect an air-fuel ratio of in-flow exhaust gas that flows into the catalyst, a downstream air-fuel ratio sensor configured to detect an air-fuel ratio of out-flow exhaust gas that flows out of the catalyst, and an electronic control unit configured to control the air-fuel ratio of the in-flow exhaust gas. The electronic control unit is configured to, when a predetermined condition is satisfied, control the air-fuel ratio of the in-flow exhaust gas based on an output from the downstream air-fuel ratio sensor without using an output from the upstream air-fuel ratio sensor. The electronic control unit is configured to, when the predetermined condition is not satisfied, control the air-fuel ratio of the in-flow exhaust gas based on the output from the upstream air-fuel ratio sensor.Type: ApplicationFiled: April 13, 2023Publication date: December 21, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kenji FURUI
-
Publication number: 20230258066Abstract: An object of the present invention is to provide a diverting agent having an excellent filling property against various fractures. The diverting agent of the present invention contains a powder-like polyvinyl alcohol-based resin (P1) and a pellet-like polyvinyl alcohol-based resin (P2), and has an adsorption coefficient kc of 0.01 or more and 1 or less, which is obtained by a method including steps (i) to (iii). (The steps (i) to (iii) are the same as those described in the description.Type: ApplicationFiled: April 20, 2023Publication date: August 17, 2023Applicant: Mitsubishi Chemical CorporationInventors: Shusaku MANDAI, Yasuhiro HIRANO, Yuya KANAMORI, Kenji FURUI, Keito IKEBATA, Tomoki ONISHI
-
Patent number: 11674073Abstract: A diverting agent of the present invention contains a polyvinyl alcohol-based resin, wherein when the diverting agent is added to a 0.48 mass % aqueous solution of guar gum to prepare a mixed solution having a concentration of 12 mass %, a dispersion liquid obtained by dispersing the mixed solution at 30° C.Type: GrantFiled: August 9, 2021Date of Patent: June 13, 2023Assignee: MITSUBISHI CHEMICAL CORPORATIONInventors: Shusaku Mandai, Yasuhiro Hirano, Ryosuke Taniguchi, Chizuko Furo, Kenji Furui, Kenji Shinohara, Ken Sato
-
Patent number: 11492952Abstract: A catalyst degradation detection apparatus includes an air-fuel ratio detector disposed downstream of a catalyst and configured to detect an air-fuel ratio of exhaust gas flowing out from the catalyst, and an electronic control unit configured to control an air-fuel ratio of inflow exhaust gas flowing into the catalyst and determine whether the catalyst is degraded. The electronic control unit is configured to execute degradation determination control that brings the air-fuel ratio of the inflow exhaust gas to an air-fuel ratio leaner or richer than a stoichiometric air-fuel ratio. The electronic control unit is configured to determine whether precious metal of the catalyst is degraded based on the air-fuel ratio detected by the air-fuel ratio detector when an oxygen storage amount of the catalyst is varying in the degradation determination control.Type: GrantFiled: December 9, 2020Date of Patent: November 8, 2022Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kenji Furui, Go Hayashita, Yoichi Kadota
-
Patent number: 11434806Abstract: The catalyst deterioration detection system 1 comprises an air-fuel ratio detection device 41 detecting an air-fuel ratio of an exhaust gas flowing out from the catalyst 20, an air-fuel ratio control part 71, and a deterioration judgment part 72. The air-fuel ratio control part is configured to perform a lean control making the air-fuel ratio of the inflowing exhaust gas leaner than a stoichiometric air-fuel ratio and a rich control making the air-fuel ratio of the inflowing exhaust gas richer than the stoichiometric air-fuel ratio. The deterioration judgment part is configured to calculate an amplitude of an air-fuel ratio of an exhaust gas flowing out from the catalyst due to the lean control and the rich control based on an output of the air-fuel ratio detection device and judge that the catalyst is deteriorating if the amplitude is equal to or greater than a threshold value.Type: GrantFiled: November 12, 2020Date of Patent: September 6, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenji Furui, Go Hayashita, Yoichi Kadota
-
Patent number: 11365667Abstract: The catalyst deterioration detection system 1 comprises an air-fuel ratio detection device 41 detecting an air-fuel ratio of an exhaust gas flowing out from the catalyst 20, an air-fuel ratio control part 71, and a deterioration judgment part 72. The air-fuel ratio control part is configured to perform a lean control making the air-fuel ratio of the inflowing exhaust gas leaner than a stoichiometric air-fuel ratio and a rich control making the air-fuel ratio of the inflowing exhaust gas richer than the stoichiometric air-fuel ratio. The deterioration judgment part is configured to calculate an amplitude of an air-fuel ratio of an exhaust gas flowing out from the catalyst due to the lean control and the rich control based on an output of the air-fuel ratio detection device and judge that the catalyst is deteriorating if the amplitude is equal to or greater than a threshold value.Type: GrantFiled: November 12, 2020Date of Patent: June 21, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenji Furui, Go Hayashita, Yoichi Kadota
-
Publication number: 20210363411Abstract: A diverting agent of the present invention contains a polyvinyl alcohol-based resin, wherein when the diverting agent is added to a 0.48 mass % aqueous solution of guar gum to prepare a mixed solution having a concentration of 12 mass %, a dispersion liquid obtained by dispersing the mixed solution at 30° C.Type: ApplicationFiled: August 9, 2021Publication date: November 25, 2021Applicant: Mitsubishi Chemical CorporationInventors: Shusaku MANDAI, Yasuhiro HIRANO, Ryosuke TANIGUCHI, Chizuko FURO, Kenji FURUI, Kenji SHINOHARA, Ken SATO
-
Patent number: 11143128Abstract: An exhaust purification system of an internal combustion engine includes a catalyst arranged in an exhaust passage of the internal combustion engine and able to store oxygen, a storage amount calculating part configured to calculate an oxygen storage amount of the catalyst, a poisoning amount calculating part configured to calculate a poisoning amount of the catalyst, and an oxygen amount control part configured to control an amount of oxygen supplied to the catalyst based on the oxygen storage amount and the poisoning amount.Type: GrantFiled: December 24, 2019Date of Patent: October 12, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ryosuke Kayanuma, Kenji Furui, Koichiro Fukuda
-
Publication number: 20210199040Abstract: The catalyst deterioration detection system 1 comprises an air-fuel ratio detection device 41 detecting an air-fuel ratio of an exhaust gas flowing out from the catalyst 20, an air-fuel ratio control part 71, and a deterioration judgment part 72. The air-fuel ratio control part is configured to perform a lean control making the air-fuel ratio of the inflowing exhaust gas leaner than a stoichiometric air-fuel ratio and a rich control making the air-fuel ratio of the inflowing exhaust gas richer than the stoichiometric air-fuel ratio. The deterioration judgment part is configured to calculate an amplitude of an air-fuel ratio of an exhaust gas flowing out from the catalyst due to the lean control and the rich control based on an output of the air-fuel ratio detection device and judge that the catalyst is deteriorating if the amplitude is equal to or greater than a threshold value.Type: ApplicationFiled: November 12, 2020Publication date: July 1, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenji FURUI, Go HAYASHITA, Yoichi KADOTA
-
Publication number: 20210199041Abstract: A catalyst degradation detection apparatus includes an air-fuel ratio detector disposed downstream of a catalyst and configured to detect an air-fuel ratio of exhaust gas flowing out from the catalyst, and an electronic control unit configured to control an air-fuel ratio of inflow exhaust gas flowing into the catalyst and determine whether the catalyst is degraded. The electronic control unit is configured to execute degradation determination control that brings the air-fuel ratio of the inflow exhaust gas to an air-fuel ratio leaner or richer than a stoichiometric air-fuel ratio. The electronic control unit is configured to determine whether precious metal of the catalyst is degraded based on the air-fuel ratio detected by the air-fuel ratio detector when an oxygen storage amount of the catalyst is varying in the degradation determination control.Type: ApplicationFiled: December 9, 2020Publication date: July 1, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenji FURUI, Go HAYASHITA, Yoichi KADOTA
-
Patent number: 10815853Abstract: When an abnormality diagnosis of an SCR catalyst is carried out, diagnostic supply control is carried out in such a manner that the first estimated adsorption amount, which is an amount of adsorption of ammonia in the SCR catalyst at the time when the SCR catalyst is assumed to be in a predetermined abnormal state, becomes equal to or more than a first predetermined adsorption amount, and the second estimated adsorption amount, which is an amount of adsorption of ammonia in the SCR catalyst at the time when the SCR catalyst is assumed to be in a predetermined normal state, becomes smaller than a second predetermined adsorption amount. Then, supply decreasing control to decrease an amount of adsorption of ammonia in the SCR catalyst is carried out, after the end of the execution of the diagnostic supply control.Type: GrantFiled: December 20, 2018Date of Patent: October 27, 2020Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takeru Shirasawa, Toru Kidokoro, Makoto Ogiso, Kenji Furui
-
Patent number: 10753261Abstract: In the abnormality diagnosis device which carries out an abnormality diagnosis of the reducing agent adding device by obtaining a diagnostic parameter which is a parameter correlated with an amount of pressure drop in a reducing agent passage in the case where, from a state in which an addition valve has been closed and in which a voltage to be applied to a pump is controlled to a diagnostic voltage so that the pressure in the reducing agent passage becomes a predetermined pressure, the addition valve is made to open in a state where the voltage to be applied to the pump is maintained at the diagnostic voltage, and by making a comparison between the diagnostic parameter and a predetermined threshold value, the abnormality diagnosis is carried out by using the diagnostic parameter or the predetermined threshold value which is corrected based on the pump discharge capacity of the pump.Type: GrantFiled: December 13, 2018Date of Patent: August 25, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toru Kidokoro, Makoto Ogiso, Takeru Shirasawa, Kenji Furui, Kazuya Takaoka
-
Patent number: 10711678Abstract: In the abnormality diagnosis device which carries out an abnormality diagnosis of the reducing agent adding device by obtaining a diagnostic parameter which is a parameter correlated with an amount of pressure drop in a reducing agent passage in the case where, from a state in which an addition valve has been closed and in which a voltage to be applied to a pump is controlled to a diagnostic voltage so that the pressure in the reducing agent passage becomes a predetermined pressure, the addition valve is made to open in a state where the voltage to be applied to the pump is maintained at the diagnostic voltage, and by making a comparison between the diagnostic parameter and a predetermined threshold value, the abnormality diagnosis is carried out by using the diagnostic parameter or the predetermined threshold value which is corrected based on the pump discharge capacity of the pump.Type: GrantFiled: December 13, 2018Date of Patent: July 14, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toru Kidokoro, Makoto Ogiso, Takeru Shirasawa, Kenji Furui, Kazuya Takaoka
-
Publication number: 20200208586Abstract: An exhaust purification system of an internal combustion engine includes a catalyst arranged in an exhaust passage of the internal combustion engine and able to store oxygen, a storage amount calculating part configured to calculate an oxygen storage amount of the catalyst, a poisoning amount calculating part configured to calculate a poisoning amount of the catalyst, and an oxygen amount control part configured to control an amount of oxygen supplied to the catalyst based on the oxygen storage amount and the poisoning amount.Type: ApplicationFiled: December 24, 2019Publication date: July 2, 2020Inventors: Ryosuke KAYANUMA, Kenji FURUI, Koichiro FUKUDA
-
Publication number: 20190275465Abstract: An abnormality diagnosis system for an exhaust gas purification device performs abnormality diagnosis of an SCR catalyst on the basis of the concentration of ammonia in exhaust gas in the region downstream of the SCR catalyst. The system includes a controller configured to estimate the amount of ammonia adsorbed in the SCR catalyst in an abnormal condition (ammonia adsorption amount in abnormal condition) and the amount of ammonia adsorbed in the SCR catalyst in a normal condition (ammonia adsorption amount in normal condition). When performing abnormality diagnosis of the SCR catalyst, the controller supplies reducing agent so as to make the ammonia adsorption amount in abnormal condition larger than a first predetermined adsorption amount equal to or larger than a slip start adsorption amount in abnormal condition and to make the ammonia adsorption amount in normal condition smaller than a second predetermined adsorption amount equal to or smaller than a slip start adsorption amount in normal condition.Type: ApplicationFiled: November 24, 2017Publication date: September 12, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeru SHIRASAWA, Toru KIDOKORO, Makoto OGISO, Kenji FURUI, Kenta HIROOKA
-
Patent number: 10385752Abstract: An amount of reducing agent adsorbed on a NOx catalyst when a reducing agent supply device is normal and a corresponding detected value may be estimated. The corresponding detected value may be detected by a NOx sensor, and the detected value may correspond to an amount of reducing agent adsorbed on the NOx catalyst. When the estimated amount of adsorption is larger than or equal to a first amount and is smaller than or equal to a second amount, a diagnosis of the NOx catalyst based on the detected value of the NOx sensor may be prevented. The first amount may be an amount of adsorbed reducing agent corresponding to a minimum value of the corresponding detected value. The second amount may be an amount of adsorbed reducing agent corresponding to the corresponding detected value when the amount of adsorbed reducing agent is zero and larger than the first amount.Type: GrantFiled: June 10, 2016Date of Patent: August 20, 2019Assignee: Toyota Jidosha Kabushiki KaishaInventors: Arifumi Matsumoto, Taiga Hagimoto, Kenji Furui, Makoto Ogiso, Toru Kidokoro
-
Publication number: 20190195107Abstract: When an abnormality diagnosis of an SCR catalyst is carried out, diagnostic supply control is carried out in such a manner that the first estimated adsorption amount, which is an amount of adsorption of ammonia in the SCR catalyst at the time when the SCR catalyst is assumed to be in a predetermined abnormal state, becomes equal to or more than a first predetermined adsorption amount, and the second estimated adsorption amount, which is an amount of adsorption of ammonia in the SCR catalyst at the time when the SCR catalyst is assumed to be in a predetermined normal state, becomes smaller than a second predetermined adsorption amount. Then, supply decreasing control to decrease an amount of adsorption of ammonia in the SCR catalyst is carried out, after the end of the execution of the diagnostic supply control.Type: ApplicationFiled: December 20, 2018Publication date: June 27, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takeru SHIRASAWA, Toru KIDOKORO, Makoto OGISO, Kenji FURUI
-
Publication number: 20190186327Abstract: In the abnormality diagnosis device which carries out an abnormality diagnosis of the reducing agent adding device by obtaining a diagnostic parameter which is a parameter correlated with an amount of pressure drop in a reducing agent passage in the case where, from a state in which an addition valve has been closed and in which a voltage to be applied to a pump is controlled to a diagnostic voltage so that the pressure in the reducing agent passage becomes a predetermined pressure, the addition valve is made to open in a state where the voltage to be applied to the pump is maintained at the diagnostic voltage, and by making a comparison between the diagnostic parameter and a predetermined threshold value, the abnormality diagnosis is carried out by using the diagnostic parameter or the predetermined threshold value which is corrected based on the pump discharge capacity of the pump.Type: ApplicationFiled: December 13, 2018Publication date: June 20, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Toru KIDOKORO, Makoto OGISO, Takeru SHIRASAWA, Kenji FURUI, Kazuya TAKAOKA
-
Patent number: 10138786Abstract: An additive amount of a reducing agent to a selective reduction-type NOx catalyst is optimized. An ammonia adsorption amount of the selective reduction-type NOx catalyst is estimated based on one or a plurality of prescribed parameters related to the ammonia adsorption amount and a specific ammonia adsorption amount that is an estimated value of the ammonia adsorption amount specified by at least one of a maximum value and a minimum value of an estimated value of the ammonia adsorption amount is estimated based on an error in the prescribed parameter, and when the specific ammonia adsorption amount is outside a target range of the ammonia adsorption amount, addition of an ammonia precursor or ammonia using an adding valve is controlled such that the specific ammonia adsorption amount returns to the target range.Type: GrantFiled: August 4, 2015Date of Patent: November 27, 2018Assignee: Toyota Jidosha Kabushiki KaishaInventors: Arifumi Matsumoto, Toru Kidokoro, Taiga Hagimoto, Kenji Furui, Akifumi Uozumi