Patents by Inventor Satoshi Hiranuma

Satoshi Hiranuma 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).

  • Publication number: 20090100827
    Abstract: An exhaust gas purification apparatus includes a venturi constituting part of an exhaust pipe and formed by joining two axially divided parts together, and a reducing agent supply device for injecting an aqueous urea solution into the exhaust pipe. The venturi is positioned such that joints thereof are located to the right and left, respectively, of the center of a cross section perpendicular to the axis of the venturi.
    Type: Application
    Filed: October 7, 2008
    Publication date: April 23, 2009
    Applicant: MITSUBISHI FUSO TRUCK AND BUS CORPORATION
    Inventors: Yasuko SUZUKI, Hiroaki FUJITA, Satoshi HIRANUMA, Shinichi SAITO, Masayuki KATAFUCHI
  • Publication number: 20090100825
    Abstract: An exhaust purification apparatus comprises an ammonia selective reduction-type NOx catalyst that selectively reduces NOx within exhaust gas by using ammonia as a reducing agent, a urea-water supply device that supplies urea-water into the exhaust gas existing upstream of the ammonia selective reduction-type NOx catalyst, and a control unit. The control unit controls the urea-water supply device so that the urea-water is intermittently supplied according to predetermined supply duration time and predetermined supply suspension time when the urea-water is supplied from the urea-water supply device for the purpose of providing ammonia to the ammonia selective reduction-type NOx catalyst.
    Type: Application
    Filed: October 14, 2008
    Publication date: April 23, 2009
    Applicant: MITSUBISHI FUSO TRUCK AND BUS CORPORATION
    Inventors: Satoshi HIRANUMA, Minehiro MURATA, Yoshinaka TAKEDA, Hiroaki FUJITA, Satoshi YAMAZAKI, Shinichi SAITO, Yasuko SUZUKI
  • Publication number: 20090094964
    Abstract: An exhaust purification apparatus for an engine comprises an upstream casing that has a cylindrical shape and accommodates a particulate filter; an exhaust gas outlet that is formed in a side wall of the upstream casing and discharges the exhaust gas that has passed through the particulate filter; a urea-water injector that is fixed to the upstream casing located in a position opposite to the exhaust gas outlet and injects urea-water toward the exhaust gas outlet; and a downstream casing that accommodates an ammonia selective reduction-type NOx catalyst into which the exhaust gas discharged from the exhaust gas outlet flows.
    Type: Application
    Filed: October 7, 2008
    Publication date: April 16, 2009
    Applicant: MITSUBISHI FUSO TRUCK AND BUS CORPORATION
    Inventors: Hiroaki Fujita, Satoshi Hiranuma, Minehiro Murata, Satoshi Yamazaki, Goro Iijima, Yoshinaka Takeda
  • Patent number: 7497078
    Abstract: An exhaust gas purifying system reliably detects an amount of accumulated particulates, lengthens forced regeneration intervals, and improves fuel efficiency. The exhaust gas purifying system comprises: a particulate filter 22 disposed in an exhaust system of an internal combustion engine 2 and collecting particulates from exhaust gas, and an NO2 generating unit 21 upstream of or in the particulate filter 22; a discharged particulate amount calculating unit A1 calculates an amount Me of discharged particulates on the basis of an excess air ratio ?; a burnt particulate amount calculating unit A2 calculates an amount Mb of burnt particulates on the basis of the temperature of exhaust gas in front of the particulate filter or the temperature of the particulate filter; and a particulate accumulation amount calculating unit calculates an amount Ma of accumulated particulates on the basis of the amount Me of discharged particulates or the amount Mb of burnt particulates.
    Type: Grant
    Filed: October 16, 2003
    Date of Patent: March 3, 2009
    Assignee: Mitsubishi Fuso Truck and Bus Corporation
    Inventors: Satoshi Hiranuma, Ritsuko Shinozaki, Yoshinori Takahashi, Yoshinaka Takeda, Reiko Doumeki, Shinichi Saito, Toru Kawatani, Takeshi Hashizume, Kenji Kawai
  • Publication number: 20090019842
    Abstract: An exhaust purification device for an engine comprises a catalyst device that purifies the exhaust gas of the engine by using an additive; a venturi-shaped mixing chamber that is disposed upstream from the catalyst device and extends from a taper portion with a diameter tapering downstream to continue to a constricted portion with a minimum diameter and then to a flared portion with a diameter that is increased in the downstream direction; a swirl-generating device that is disposed in vicinity of a most upstream section of the taper portion of the mixing chamber and generates a swirling flow in the exhaust gas; and an additive-injection device that is disposed upstream from the constricted portion of the mixing chamber and downstream from the swirl-generating device, and injects the additive into the mixing chamber.
    Type: Application
    Filed: July 18, 2008
    Publication date: January 22, 2009
    Applicant: MITSUBISHI FUSO TRUCK AND BUS CORPORATION
    Inventors: Yasuko SUZUKI, Hiroaki FUJITA, Satoshi HIRANUMA, Shinichi SAITO, Yoshio NAKAYAMA
  • Publication number: 20090019837
    Abstract: An exhaust purification device for an engine comprises a catalytic device for purifying exhaust by using an additive, a deflecting device for allowing the exhaust to flow through and causing the exhaust to be agitated, upstream of the catalytic device, an additive injection device for injecting an additive, downstream of the deflecting device, a temperature detection device for detecting exhaust temperature, downstream of the deflecting device, and a control unit for controlling the additive injection device on the basis of the exhaust temperature detected by the temperature detection device. The temperature detection device has a temperature detection part located within a region where the exhaust having passed through the deflecting device has increased velocity.
    Type: Application
    Filed: July 18, 2008
    Publication date: January 22, 2009
    Applicant: MITSUBISHI FUSO TRUCK AND BUS CORPORATION
    Inventors: Yasuko SUZUKI, Hiroaki FUJITA, Satoshi HIRANUMA, Shinichi SAITO, Yoshio NAKAYAMA
  • Publication number: 20070160508
    Abstract: An exhaust gas purification device comprises a NOx catalyst for purifying NOx contained in exhaust gas by using ammonia as a reducing agent, an ammonia supply device for supplying ammonia to the NOx catalyst, a catalyst temperature sensor for detecting the internal temperature of the NOx catalyst, and a control unit that stops the ammonia supply from the ammonia supply device when the stop condition is satisfied that the internal temperature of the NOx catalyst becomes equal to or higher than first prescribed temperature in the process where ammonia is supplied from the ammonia supply device to the NOx catalyst.
    Type: Application
    Filed: December 4, 2006
    Publication date: July 12, 2007
    Applicants: MITSUBISHI FUSO TRUCK AND BUS CORPORATION, NISSAN DIESEL MOTOR CO., LTD.
    Inventors: Reiko DOUMEKI, Yoshinaka TAKEDA, Satoshi HIRANUMA, Ritsuko SHINOZAKI, Shinichi SAITOU, Yasuko SUZUKI
  • Patent number: 7104049
    Abstract: An exhaust gas purification system includes an oxygen mass flow rate detecting unit for detecting or calculating a mass flow rate of oxygen fed to a filter and a regeneration end determining unit for determining a regeneration end of the filter in accordance with information provided from the oxygen mass flow rate detecting-unit and upon arrival of an integrated value of the oxygen mass flow rate at a predetermined value during regeneration of the filter.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: September 12, 2006
    Inventors: Satoshi Hiranuma, Yoshinaka Takeda, Toru Kawatani, Reiko Doumeki
  • Publication number: 20060107658
    Abstract: An exhaust gas purifying system reliably detects an amount of accumulated particulates, lengthens forced regeneration intervals, and improves fuel efficiency. The exhaust gas purifying system comprises: a particulate filter 22 disposed in an exhaust system of an internal combustion engine 2 and collecting particulates from exhaust gas, and an NO2 generating unit 21 upstream of or in the particulate filter 22; a discharged particulate amount calculating unit A1 calculates an amount Me of discharged particulates on the basis of an excess air ratio ?; a burnt particulate amount calculating unit A2 calculates an amount Mb of burnt particulates on the basis of the temperature of exhaust gas in front of the particulate filter or the temperature of the particulate filter; and a particulate accumulation amount calculating unit calculates an amount Ma of accumulated particulates on the basis of the amount Me of discharged particulates or the amount Mb of burnt particulates.
    Type: Application
    Filed: October 16, 2003
    Publication date: May 25, 2006
    Applicant: MITSUBISHI FUSO TRUCK AND BUS CORPORATION
    Inventors: Satoshi Hiranuma, Ritsuko Shinozaki, Yoshinori Takahashi, Yoshinaka Takeda, Reiko Doumeki, Shinichi Saito, Toru Kawatani, Takeshi Hashizume, Kenji Kawai
  • Patent number: 7013638
    Abstract: In regenerating a filter there are performed a first additional fuel injection involving additional injection of fuel into a cylinder after a main fuel injection in an engine to raise the temperature of an oxidation catalyst and a second additional fuel injection involving fuel injection after the first additional fuel injection to supply the oxidation catalyst with the fuel, a second additional fuel injection quantity is set in accordance with an engine speed and an engine load and is changed in accordance with an outlet temperature of the oxidation catalyst.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: March 21, 2006
    Assignee: Mitsubishi Fuso Truck and Bus Corporation
    Inventors: Satoshi Hiranuma, Yoshinaka Takeda, Toru Kawatani, Reiko Doumeki
  • Publication number: 20050266988
    Abstract: An oxidation catalyst apparatus and a particulate collecting filter are provided sequentially from an upstream side in an exhaust gas passage of a diesel engine. A ratio of the weight of Pd to a sum of the weights of Pt and Pd carried on the oxidation catalyst apparatus is satisfactory with the following inequality: 0.05?Pd/(Pt+Pd)?0.75. When the rise of the temperature of the particulate collecting filter is needed, fuel is supplied into the oxidation catalyst apparatus.
    Type: Application
    Filed: March 3, 2005
    Publication date: December 1, 2005
    Applicant: Mitsubishi Fuso Truck and Bus Corporation
    Inventors: Reiko Doumeki, Yoshinaka Takeda, Satoshi Hiranuma
  • Publication number: 20040244366
    Abstract: In regenerating a filter there are performed a first additional fuel injection involving additional injection of fuel into a cylinder after a main fuel injection in an engine to raise the temperature of an oxidation catalyst and a second additional fuel injection involving fuel injection after the first additional fuel injection to supply the oxidation catalyst with the fuel, a second additional fuel injection quantity is set in accordance with an engine speed and an engine load and is changed in accordance with an outlet temperature of the oxidation catalyst.
    Type: Application
    Filed: March 24, 2004
    Publication date: December 9, 2004
    Inventors: Satoshi Hiranuma, Yoshinaka Takeda, Toru Kawatani, Reiko Doumeki
  • Publication number: 20040244362
    Abstract: The present invention comprises an oxygen mass flow rate detecting means for detecting or calculating a mass flow rate of oxygen fed to a filter and a regeneration end determining means for determining a regeneration end of the filter in accordance with information provided from the oxygen mass flow rate detecting means and upon arrival of an integrated value of the oxygen mass flow rate at a predetermined value during regeneration of the filter.
    Type: Application
    Filed: March 24, 2004
    Publication date: December 9, 2004
    Inventors: Satoshi Hiranuma, Yoshinaka Takeda, Toru Kawatani, Reiko Doumeki
  • Patent number: 6755014
    Abstract: A NOx catalyst for selectively reducing NOx in exhaust gas by adsorbing ammonia is provided at an exhaust system of an engine, ammonia or urea water is supplied to the NOx catalyst by reducing agent supplying means, a consumption amount of ammonia adsorbed to the NOx catalyst is derived by consumption amount deriving means based on an exhaust amount of NOx exhausted from the engine detected or estimated by NOx exhaust amount deriving means and an actual NOx cleaning rate by the NOx catalyst derived by actual NOx cleaning rate deriving means, an actual adsorption amount of ammonia adsorbed to the NOx catalyst is derived in accordance with an addition amount of ammonia and the consumption amount of ammonia by adsorption amount deriving means and the reducing agent supplying means is controlled by controlling means in accordance with the actual adsorption amount.
    Type: Grant
    Filed: December 27, 2002
    Date of Patent: June 29, 2004
    Assignee: Mitsubishi Fuso Truck and Bus Corporation
    Inventors: Kenji Kawai, Yoshinori Takahashi, Shinichi Saito, Toru Kawatani, Yoshinaka Takeda, Ristuko Shinozaki, Reiko Doumeki, Takeshi Hashizume, Satoshi Hiranuma
  • Patent number: 6666019
    Abstract: An exhaust emission control system of an internal combustion engine capable of post injection is disclosed which provides control such that the injection timing in sub injection is set to a point earlier than the target injection timing when the sub injection is started, and the injection timing in the sub injection is then delayed to the target injection timing. This realizes the post injection under the optimum conditions and enables an efficient rise in the exhaust temperature while inhibiting deterioration of the drivability due to a rapid change in torque.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: December 23, 2003
    Assignee: Mitsubishi Fuso Truck and Bus Corporation
    Inventors: Toru Kawatani, Kihoko Kaita, Shinichi Saito, Takeshi Hashizume, Junya Watanabe, Kenji Kawai, Satoshi Hiranuma, Yoshinaka Takeda
  • Patent number: 6634170
    Abstract: An exhaust emission control system of an internal combustion engine is provided which controls the oxygen concentration of exhaust passing through the exhaust emission control device according to the flow rate of exhaust flowing through an exhaust passage when the exhaust emission control device is regenerated, so that the regeneration is completed within a short period of time while the filter is prevented from being damaged by melting during the regeneration. This improves the exhaust emission control performance and reliability of the filter.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: October 21, 2003
    Assignee: Mitsubishi Fuso Truck and Bus Corporation
    Inventors: Satoshi Hiranuma, Kihoko Kaita, Shinichi Saito, Takeshi Hashizume, Junya Watanabe, Kenji Kawai, Toru Kawatani, Yoshinaka Takeda
  • Publication number: 20030182935
    Abstract: An NOx catalyst 17 for selectively reducing NOx in exhaust gas by adsorbing ammonia is provided at an exhaust system of an engine 1, ammonia or urea water is supplied to the NOx catalyst by reducing agent supplying means 29, a consumption amount of ammonia adsorbed to the NOx catalyst is derived by consumption amount deriving means 43 based on an exhaust amount of NOx exhausted from the engine detected or estimated by NOx exhaust amount deriving means 41 and an actual NOx cleaning rate by the NOx catalyst derived by actual NOx cleaning rate deriving means 42, an actual adsorption amount of ammonia adsorbed to the NOx catalyst is derived in accordance with an addition amount of ammonia and the consumption amount of ammonia by adsorption amount deriving means 45 and the reducing agent supplying means is controlled by controlling means 46 in accordance with the actual adsorption amount.
    Type: Application
    Filed: December 27, 2002
    Publication date: October 2, 2003
    Inventors: Kenji Kawai, Yoshinori Takahashi, Shinichi Saito, Toru Kawatani, Yoshinaka Takeda, Ritsuko Shinozaki, Reiko Doumeki, Takeshi Hashizume, Satoshi Hiranuma
  • Publication number: 20020157386
    Abstract: An exhaust emission control system of an internal combustion engine is provided which controls the oxygen concentration of exhaust passing through the exhaust emission control device according to the flow rate of exhaust flowing through an exhaust passage when the exhaust emission control device is regenerated, so that the regeneration is completed within a short period of time while the filter is prevented from being damaged by melting during the regeneration. This improves the exhaust emission control performance and reliability of the filter.
    Type: Application
    Filed: March 27, 2002
    Publication date: October 31, 2002
    Inventors: Satoshi Hiranuma, Kihoko Kaita, Shinichi Saito, Takeshi Hashizume, Junya Watanabe, Kenji Kawai, Toru Kawatani, Yoshinaka Takeda
  • Publication number: 20020152744
    Abstract: An exhaust emission control system of an internal combustion engine capable of post injection is disclosed which provides control such that the injection timing in sub injection is set to a point earlier than the target injection timing when the sub injection is started, and the injection timing in the sub injection is then delayed to the target injection timing. This realizes the post injection under the optimum conditions and enables an efficient rise in the exhaust temperature while inhibiting deterioration of the drivability due to a rapid change in torque.
    Type: Application
    Filed: March 27, 2002
    Publication date: October 24, 2002
    Inventors: Toru Kawatani, Kihoko Kaita, Shinichi Saito, Takeshi Hashizume, Junya Watanabe, Kenji Kawai, Satoshi Hiranuma, Yoshinaka Takeda
  • Patent number: 5625610
    Abstract: Additional information for each musical program is automatically recorded on an optical disc. A digital voice signal reproduced from a mini-disc is sent to an MD system via a digital voice signal line and recorded on another mini-disc. Additional information such as the title of a musical program is sent via a serial communication line 6 to a MD control microcomputer and stored in its RAM which stores U-TOC information. The U-TOC information stored in RAM is recorded on the mini-disc before it is dismounted from the MD system.
    Type: Grant
    Filed: November 17, 1993
    Date of Patent: April 29, 1997
    Assignee: Kabushiki Kaisha Kenwood
    Inventor: Satoshi Hiranuma