Patents by Inventor Akira Mikami

Akira Mikami 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: 10753249
    Abstract: An exhaust emission control device for an internal combustion engine according to the present disclosure includes an exhaust emission control catalyst provided in an exhaust passage in an internal combustion engine and divided into a preceding catalyst and a succeeding catalyst, and a heating device provided in the exhaust passage between the preceding catalyst and the succeeding catalyst. The exhaust emission control catalyst is divided into the preceding catalyst and the succeeding catalyst so that a ratio of a capacity of the preceding catalyst to a total displacement of the internal combustion engine is from 0.3 to 1.5.
    Type: Grant
    Filed: January 28, 2019
    Date of Patent: August 25, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryohei Ono, Masaaki Sato, Katsuhiro Ito, Akira Mikami, Kazuhiro Umemoto, Daichi Imai
  • Patent number: 10677125
    Abstract: An exhaust gas purification apparatus for an internal combustion engine includes the adsorbent, the catalyst and the heat generating element, wherein in cases where the residual capacity of the battery is smaller than a first predetermined value required for raising the temperature of the catalyst to an activation temperature thereof, and in cases where the residual capacity of the battery is larger than a second predetermined value which is smaller than the first predetermined value and which is required for raising the temperature of the adsorbent to a predetermined temperature at which the adsorbent exhibits adsorption performance required at the time of starting of the internal combustion engine, an amount of electric power to be supplied to the heat generating element from the battery is adjusted such that the temperature of the adsorbent becomes the predetermined temperature.
    Type: Grant
    Filed: December 5, 2018
    Date of Patent: June 9, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryohei Ono, Masaaki Sato, Katsuhiro Ito, Akira Mikami, Kazuhiro Umemoto, Daichi Imai
  • Patent number: 10655519
    Abstract: A vehicle includes a filter disposed in an exhaust passage through which exhaust gas discharged from an internal combustion engine passes, the filter being configured to collect PM that is particulate matter contained in the exhaust gas; a PM removal control device configured to start execution of PM removal control that heats the filter to remove the PM accumulated on the filter while the internal combustion engine is stopped; and a determination device configured to determine whether a user of the vehicle is away from the vehicle. The PM removal control device is configured to start the execution of the PM removal control only when the determination device determines that the user of the vehicle is away from the vehicle.
    Type: Grant
    Filed: December 18, 2017
    Date of Patent: May 19, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Edgar Yoshio Morales Teraoka, Katsuhiro Itou, Ryouhei Ohno, Akira Mikami, Keishi Takada, Masaaki Satou
  • Patent number: 10648391
    Abstract: A controller estimates a 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, estimates a second estimated adsorption amount at the time when the SCR catalyst is assumed to be in a predetermined normal state, calculates a first slip development temperature based on the first estimated adsorption amount, and calculates a second slip development temperature based on the second estimated adsorption amount. The controller, when carrying out an abnormality diagnosis based on a concentration of ammonia in an exhaust gas at the downstream side of the SCR catalyst, carries out diagnostic temperature control so as to control the temperature of the SCR catalyst to a temperature which is equal to or more than the first slip development temperature and is less than the second slip development temperature.
    Type: Grant
    Filed: December 17, 2018
    Date of Patent: May 12, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryohei Ono, Masaaki Sato, Katsuhiro Ito, Akira Mikami, Kazuhiro Umemoto, Daichi Imai
  • Patent number: 10626778
    Abstract: When a user requests start-up of an internal combustion engine while PM removal control is in execution or immediately after execution of the PM removal control is completed, an electronic control unit informs the user of the vehicle of a first alarm, so that the user recognizes that the internal combustion engine cannot be started up immediately. This makes it possible to suppress the discomfort caused because the internal combustion engine is not started up.
    Type: Grant
    Filed: December 13, 2017
    Date of Patent: April 21, 2020
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Katsuhiro Ito, Akira Mikami, Masaaki Sato, Keishi Takada, Ryouhei Ono, Edgar Yoshio Morales Teraoka
  • Publication number: 20190234269
    Abstract: An exhaust emission control device for an internal combustion engine according to the present disclosure includes an exhaust emission control catalyst provided in an exhaust passage in an internal combustion engine and divided into a preceding catalyst and a succeeding catalyst, and a heating device provided in the exhaust passage between the preceding catalyst and the succeeding catalyst. The exhaust emission control catalyst is divided into the preceding catalyst and the succeeding catalyst so that a ratio of a capacity of the preceding catalyst to a total displacement of the internal combustion engine is from 0.3 to 1.5.
    Type: Application
    Filed: January 28, 2019
    Publication date: August 1, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryohei ONO, Masaaki SATO, Katsuhiro ITO, Akira MIKAMI, Kazuhiro UMEMOTO, Daichi IMAI
  • Patent number: 10337376
    Abstract: An exhaust gas purification system comprises a first fuel supply unit to supply fuel to exhaust gas flowing in an exhaust passage by a supply valve arranged in the exhaust passage, and a second fuel supply unit to supply fuel to exhaust gas by adjusting a fuel injection condition, wherein in a temperature raising stage of the NOx SCR catalyst associated with the exhaust gas temperature raising processing, first control is performed in which fuel is supplied by the first fuel supply unit, and in a temperature holding stage of the NOx SCR catalyst associated with the exhaust gas temperature raising processing, at least second control is performed in which the ratio of an amount of fuel supply by the second fuel supply unit with respect to an amount of fuel supply by the first fuel supply unit becomes higher in comparison with that when performing the first control.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: July 2, 2019
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Mikami, Shigeki Nakayama, Keishi Takada, Nobumoto Ohashi, Junichi Matsuo
  • Publication number: 20190195114
    Abstract: A controller estimates a 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, estimates a second estimated adsorption amount at the time when the SCR catalyst is assumed to be in a predetermined normal state, calculates a first slip development temperature based on the first estimated adsorption amount, and calculates a second slip development temperature based on the second estimated adsorption amount. The controller, when carrying out an abnormality diagnosis based on a concentration of ammonia in an exhaust gas at the downstream side of the SCR catalyst, carries out diagnostic temperature control so as to control the temperature of the SCR catalyst to a temperature which is equal to or more than the first slip development temperature and is less than the second slip development temperature.
    Type: Application
    Filed: December 17, 2018
    Publication date: June 27, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryohei ONO, Masaaki Sato, Katsuhiro Ito, Akira Mikami, Kazuhiro Umemoto, Daichi Imai
  • Publication number: 20190186316
    Abstract: An exhaust gas purification apparatus for an internal combustion engine includes the adsorbent, the catalyst and the heat generating element, wherein in cases where the residual capacity of the battery is smaller than a first predetermined value required for raising the temperature of the catalyst to an activation temperature thereof, and in cases where the residual capacity of the battery is larger than a second predetermined value which is smaller than the first predetermined value and which is required for raising the temperature of the adsorbent to a predetermined temperature at which the adsorbent exhibits adsorption performance required at the time of starting of the internal combustion engine, an amount of electric power to be supplied to the heat generating element from the battery is adjusted such that the temperature of the adsorbent becomes the predetermined temperature.
    Type: Application
    Filed: December 5, 2018
    Publication date: June 20, 2019
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Ryohei ONO, Masaaki Sato, Katsuhiro Ito, Akira Mikami, Kazuhiro Umemoto, Daichi Imai
  • Publication number: 20180328246
    Abstract: An exhaust gas purification system comprise a first fuel supply unit to supply fuel to exhaust gas flowing in an exhaust passage by a supply valve arranged in the exhaust passage, and a second fuel supply unit to supply fuel to exhaust gas by adjusting a fuel injection condition wherein in a temperature raising stage of the NOx SCR catalyst associated with the exhaust gas temperature raising processing, first control is performed in which fuel is supplied by the first fuel supply unit, and in a temperature holding stage of the NOx SCR catalyst associated with the exhaust gas temperature raising processing, at least second control is performed in which the ratio of an amount of fuel supply by the second fuel supply unit with respect to an amount of fuel supply by the first fuel supply unit becomes higher in comparison with that when performing the first control.
    Type: Application
    Filed: December 15, 2015
    Publication date: November 15, 2018
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Mikami, Shigeki Nakayama, Keishi Takada, Nobumoto Ohashi, Junichi Matsuo
  • Patent number: 10125647
    Abstract: An exhaust gas purification apparatus for an internal combustion engine comprises: a selective catalytic reduction (SCR) catalyst selectively reducing NOx in an exhaust gas of the internal combustion engine using ammonia as a reducing agent; a supply device adding an additive agent, such as ammonia, to the exhaust gas at an upstream side of the SCR catalyst; and a controller, when a temperature of SCR catalyst is higher than a predetermined temperature, increases a NOx concentration of the exhaust gas flowing into the SCR catalyst and increases an amount of addition of the additive agent in such a manner that a ratio of an amount of ammonia with respect to an amount of NOx contained in the exhaust gas flowing into the SCR catalyst, becomes large, as compared to when the temperature is equal to or less than the predetermined temperature.
    Type: Grant
    Filed: November 27, 2014
    Date of Patent: November 13, 2018
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Mikami, Shigeki Nakayama, Nobumoto Ohashi, Keishi Takada, Junichi Matsuo
  • Publication number: 20180230878
    Abstract: In order to supply a reducing agent to two NOx catalysts arranged in series in an appropriate manner, normal control in which an additive agent of an amount according to an amount of NOx flowing into an upstream side NOx catalyst is added from an upstream side of the upstream side NOx catalyst, and decrease control in which when an amount of ammonia adsorbed to a downstream side NOx catalyst exceeds a predetermined upper limit amount in cases where the two NOx catalysts have been activated, an amount of additive agent to be added from a first addition valve is made smaller than the amount of additive agent to be added at the time of the normal control, are carried out.
    Type: Application
    Filed: January 8, 2018
    Publication date: August 16, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Keishi TAKADA, Masaaki SATO, Akira MIKAMI, Katsuhiro ITO, Ryohei ONO, Edgar Yoshio MORALES TERAOKA
  • Publication number: 20180179932
    Abstract: When it is determined that there is a possibility of start-up of an internal combustion engine while regeneration control is in execution during stop of the internal combustion engine, processing of the regeneration control is stopped. Accordingly, as compared with the case where the regeneration control is continuously executed when the internal combustion engine is started up, temperature increase in a filter can be suppressed: Therefore, even when an increased amount of oxygen is supplied to the filter, an oxidation reaction is suppressed, so that overheating of the filter can be suppressed.
    Type: Application
    Filed: December 13, 2017
    Publication date: June 28, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Ryohei ONO, Edgar Yoshio MORALES TERAOKA, Katsuhiro ITO, Akira MIKAMI, Keishi TAKADA, Masaaki SATO
  • Publication number: 20180179933
    Abstract: A vehicle includes a filter disposed in an exhaust passage through which exhaust gas discharged from an internal combustion engine passes, the filter being configured to collect PM that is particulate matter contained in the exhaust gas; a PM removal control device configured to start execution of PM removal control that heats the filter to remove the PM accumulated on the filter while the internal combustion engine is stopped; and a determination device configured to determine whether a user of the vehicle is away from the vehicle. The PM removal control device is configured to start the execution of the PM removal control only when the determination device determines that the user of the vehicle is away from the vehicle.
    Type: Application
    Filed: December 18, 2017
    Publication date: June 28, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Edgar Yoshio Morales Teraoka, Katsuhiro Itou, Ryouhei Ohno, Akira Mikami, Keishi Takada, Masaaki Satou
  • Publication number: 20180179942
    Abstract: When a user requests start-up of an internal combustion engine while PM removal control is in execution or immediately after execution of the PM removal control is completed, an electronic control unit informs the user of the vehicle of a first alarm, so that the user recognizes that the internal combustion engine cannot be started up immediately. This makes it possible to suppress the discomfort caused because the internal combustion engine is not started up.
    Type: Application
    Filed: December 13, 2017
    Publication date: June 28, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Katsuhiro ITO, Akira MIKAMI, Masaaki SATO, Keishi TAKADA, Ryouhei ONO, Edgar Yoshio MORALES TERAOKA
  • Patent number: 9822683
    Abstract: An exhaust gas purification system for an internal combustion engine is provided with a filter including a selective catalytic reduction NOx catalyst carried thereon. Further, a post-catalyst is provided for an exhaust gas passage disposed on a downstream side from the filter. The post-catalyst has an oxidizing function, and the post-catalyst has such a function that the production of N2 based on the oxidation of ammonia is facilitated in a predetermined first temperature area. A filter regeneration process execution unit is programmed to control the temperature of the post-catalyst to be in the first temperature area while adjusting the temperature of the filter to be in a predetermined second temperature area lower than a filter regeneration temperature during a certain period of time.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: November 21, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshihisa Tsukamoto, Nobumoto Ohashi, Shigeki Nakayama, Akira Mikami, Kenji Sakurai, Hiroshi Otsuki, Junichi Matsuo, Keishi Takada, Ichiro Yamamoto
  • Patent number: 9662612
    Abstract: An object of the present invention is to appropriately remove, from an exhaust gas, HC, CO, and ammonia flowing out from a filter (SCRF) on which an SCR catalyst is carried. In the present invention, a post-catalyst 8 is provided for an exhaust gas passage of an internal combustion engine on a downstream side from SCRF along with a flow of the exhaust gas. The post-catalyst 8 is constructed to include an adsorption reduction part 81c which adsorbs ammonia and which reduces NOx by using ammonia as a reducing agent, a first oxidation part 81b which oxidizes ammonia, and a second oxidation part 82 which oxidizes HO and CO.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: May 30, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akira Mikami, Shigeki Nakayama, Nobumoto Ohashi, Keishi Takada, Kenji Sakurai, Yoshihisa Tsukamoto, Hiroshi Otsuki, Junichi Matsuo, Ichiro Yamamoto
  • Patent number: 9551261
    Abstract: An object is to suppress the occurrence of a failure in supply of urea water as much as possible in filling control of urea water in a pump share-type urea water supply system with two supply valves. In the pump share-type urea water supply system with a first supply valve and a second supply valve, a urea water tank is connected with the respective supply valves by a urea water supply path. The urea water supply path includes a first supply path for the first supply valve and a second supply path for the second supply valve. The second supply path has a larger capacity than the capacity of the first supply path by a predetermined volume.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: January 24, 2017
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Junichi Matsuo, Nobumoto Ohashi, Akira Mikami, Keishi Takada, Shigeki Nakayama
  • Publication number: 20170002709
    Abstract: An exhaust gas purification apparatus for an internal combustion engine comprises: a selective catalytic reduction (SCR) catalyst selectively reducing NOx in an exhaust gas of the internal combustion engine using ammonia as a reducing agent; a supply device adding an additive agent, such as ammonia, to the exhaust gas at an upstream side of the SCR catalyst; and a controller, when a temperature of SCR catalyst is higher than a predetermined temperature, increases a NOx concentration of the exhaust gas flowing into the SCR catalyst and increases an amount of addition of the additive agent in such a manner that a ratio of an amount of ammonia with respect to an amount of NOx contained in the exhaust gas flowing into the SCR catalyst, becomes large, as compared to when the temperature is equal to or less than the predetermined temperature.
    Type: Application
    Filed: November 27, 2014
    Publication date: January 5, 2017
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akira MIKAMI, Shigeki NAKAYAMA, Nobumoto OHASHI, Keishi TAKADA, Junichi MATSUO
  • Patent number: 9512769
    Abstract: A pump share-type urea water supply system includes a first supply valve and a second supply valve. A urea water tank is connected with the respective supply valves by a urea water supply path that includes a first supply path for the first supply valve and a second supply path for the second supply valve. The second supply path has a larger capacity than the first supply path by a predetermined volume. A suck-back control controls opening and closing of the respective supply valves such that a first estimated valve-opening time of the first supply valve for suck-back control in the first supply valve and supply path is shorter than a second estimated valve-opening time of the second supply valve for suck-back control in the second supply valve and in-the-second supply path by at least a first control time corresponding to the predetermined volume.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: December 6, 2016
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Junichi Matsuo, Nobumoto Ohashi, Akira Mikami, Keishi Takada, Shigeki Nakayama