Patents by Inventor Nobuhiro Komatsu

Nobuhiro Komatsu 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: 9970342
    Abstract: An exhaust gas purification device is equipped with: an NOx purification unit disposed in exhaust gas piping of an engine supporting an NOx storage catalyst (NSC); a catalyzed soot filter (CSF) disposed downstream of the NOx purification unit supporting a particulate combustion catalyst causing captured particulates to combust; and an electronic control unit (ECU) which controls exhaust gas flowing into the NSC to be rich and which, by raising the temperature of the NSC, acts as a regeneration device that causes sulfur components captured in the NSC to be desorbed. The particulate combustion catalyst is provided where Ag and Pd have been alloyed on an Al2O3 carrier; the quantity of Ag supported by the Al2O3 carrier is 1.2-2.5 g/L; the quantity of Pd supported by the Al2O3 carrier is 0.7 g/L or less; and the ratio Ag/Pd of the Ag support quantity to the Pd support quantity is 1.7-8.3.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: May 15, 2018
    Assignees: HONDA MOTOR CO., LTD., MITSUI MINING & SMELTING CO., LTD.
    Inventors: Ryosaku Takahara, Koichi Inaba, Nobuhiro Komatsu, Masafumi Sakota, Takahiro Kogawa, Michitaka Yamaguchi
  • Publication number: 20180023436
    Abstract: An exhaust gas purification device is equipped with: an NOx purification unit disposed in exhaust gas piping of an engine supporting an NOx storage catalyst (NSC); a catalyzed soot filter (CSF) disposed downstream of the NOx purification unit supporting a particulate combustion catalyst causing captured particulates to combust; and an electronic control unit (ECU) which controls exhaust gas flowing into the NSC to be rich and which, by raising the temperature of the NSC, acts as a regeneration device that causes sulfur components captured in the NSC to be desorbed. The particulate combustion catalyst is provided where Ag and Pd have been alloyed on an Al2O3 carrier; the quantity of Ag supported by the Al2O3 carrier is 1.2-2.5 g/L; the quantity of Pd supported by the Al2O3 carrier is 0.7 g/L or less; and the ratio Ag/Pd of the Ag support quantity to the Pd support quantity is 1.7-8.3.
    Type: Application
    Filed: January 29, 2016
    Publication date: January 25, 2018
    Applicants: HONDA MOTOR CO., LTD., MITSUI MINING & SMELTING CO., LTD.
    Inventors: Ryosaku Takahara, Koichi Inaba, Nobuhiro Komatsu, Masafumi Sakota, Takahiro Kogawa, Michitaka Yamaguchi
  • Patent number: 8434296
    Abstract: Provided is an exhaust emission control device for an internal combustion engine capable of preventing NOx purification performance from degrading according to the operating condition. The exhaust emission control device comprises a NOx purification catalyst, a catalytic converter for continuously reducing the NOx in the exhaust emissions, a fuel reformer for reforming fuel to manufacture a reformed gas and supplying the reformed gas as the reducing gas from the upstream side of the NOx purification catalyst and the catalytic converter of the exhaust pipe, an operating condition detecting means for detecting the operating condition of an engine, and an enriching means for enriching the exhaust air-fuel ratio. The enriching means enriches the exhaust air-fuel ratio by supplying the reducing gas into the exhaust pipe by using the fuel reformer when the operating condition detected by the operating condition detecting means is a high-load operating condition.
    Type: Grant
    Filed: November 18, 2008
    Date of Patent: May 7, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Katsuji Wada, Shinya Ishimaru, Jun Iwamoto, Nobuhiro Komatsu
  • Patent number: 8028518
    Abstract: In a control device for an internal combustion engine provided with a NOX catalytic converter in an exhaust passage thereof, the progress of sulfur purging is computed from the consumption of reducing agent contained in the exhaust gas in the NOX catalytic converter. This computation may be based on the air fuel ratio of exhaust gas upstream of the NOX catalytic converter and the estimated consumption of the reducing agent contained in the exhaust gas or on the difference between the air fuel ratios of exhaust gas upstream and downstream of the NOX catalytic converter. In either case, the accuracy can be improved by taking into account the space velocity of the exhaust gas.
    Type: Grant
    Filed: July 31, 2007
    Date of Patent: October 4, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Hisao Haga, Norio Suzuki, Katsuji Wada, Nobuhiro Komatsu
  • Patent number: 7963101
    Abstract: An exhaust gas purifying device for an internal combustion engine, comprises: a first catalyst (TWC 7, example) having a reducing capability; a second catalyst (LNC 9, example) provided downstream of the first catalyst, the second catalyst is adapted to trap NOx in a lean condition of air fuel ratio of an exhaust gas and reduce the trapped NOx in a rich condition of air fuel ratio of the exhaust gas; and an exhaust air fuel ratio control means for controlling an exhaust air fuel ratio to decrease the NOx in the first and second catalysts, wherein the exhaust air fuel ratio control means conducts NOx decreasing control suitable for the first catalyst when the second catalyst is in an inactive state and the first catalyst is in an active state, and wherein the exhaust air fuel ratio control means conducts NOx decreasing control suitable for the second catalyst after the second catalyst is activated.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: June 21, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Norio Suzuki, Nobuhiro Komatsu, Tomoko Morita, Hisao Haga
  • Patent number: 7950225
    Abstract: An exhaust control system for an internal combustion engine provided with an exhaust gas processing device and a NOx purifying catalyst which are arranged in series in an exhaust system, comprises: a first temperature detector for detecting a temperature of the exhaust gas processing device; a second temperature detector for detecting a temperature of the NOx purifying catalyst; a control means for controlling an exhaust temperature to conduct a regeneration process for removing sulfur contents trapped by the NOx purifying catalyst; and a control mode selection means for selecting one of a plurality of exhaust temperature control modes according to a relationship between an output from the first temperature detector and an output from the second temperature detector, wherein the control means conducts exhaust temperature control according to the control mode selected by the control mode selection means.
    Type: Grant
    Filed: December 12, 2007
    Date of Patent: May 31, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Nobuhiro Komatsu, Norio Suzuki
  • Patent number: 7900440
    Abstract: An exhaust emission control device for an internal combustion engine, which is capable of completing a regeneration operation in a short time period, thereby making it possible to ensure excellent fuel economy. The exhaust emission control device includes a NOx catalyst, an ECU, and a NOx catalyst temperature sensor. The ECU sets a control parameter for controlling the operation of the engine to first to third predetermined values. The ECU selects the first predetermined value when the temperature of the NOx catalyst detected by the NOx catalyst temperature sensor is within a target temperature range, and selects the second predetermined value when the detected temperature of the NOx catalyst is lower than the target temperature range. Further, the ECU selects the third predetermined values when the detected temperature of the NOx catalyst is higher than the target temperature range.
    Type: Grant
    Filed: February 27, 2008
    Date of Patent: March 8, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Nobuhiro Komatsu, Norio Suzuki
  • Publication number: 20100275581
    Abstract: Provided is an exhaust emission control device for an internal combustion engine capable of preventing NOx purification performance from degrading according to the operating condition.
    Type: Application
    Filed: November 18, 2008
    Publication date: November 4, 2010
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Katsuji Wada, Shinya Ishimaru, Jun Iwamoto, Nobuhiro Komatsu
  • Publication number: 20100275582
    Abstract: Provided is an exhaust emission control device for an internal combustion engine capable of high-efficiency DPF regeneration processing. The exhaust emission control device comprises a DPF for collecting PMs in exhaust emissions, which is provided in an exhaust pipe of an engine, a fuel reformer for reforming fuel to manufacture a reducing gas containing hydrogen and carbon monoxide and supplying the reducing gas from an introduction port provided on the upstream side of the DPF of the exhaust pipe into the exhaust pipe, which is provided separately from the exhaust pipe, a catalyst converter for continuously oxidizing the reducing gas, which is provided between the introduction port and the DPF of the exhaust pipe, and a regeneration means for performing regeneration processing for burning the PMs collected by the DPF while the reducing gas is supplied into the exhaust pipe by the fuel reformer.
    Type: Application
    Filed: November 18, 2008
    Publication date: November 4, 2010
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Katsuji Wada, Go Motohashi, Jun Iwamoto, Nobuhiro Komatsu, Tomoko Tsuyama
  • Publication number: 20080202100
    Abstract: An exhaust emission control device for an internal combustion engine, which is capable of completing a regeneration operation in a short time period, thereby making it possible to ensure excellent fuel economy. The exhaust emission control device includes a NOx catalyst, an ECU, and a NOx catalyst temperature sensor. The ECU sets a control parameter for controlling the operation of the engine to first to third predetermined values. The ECU selects the first predetermined value when the temperature of the NOx catalyst detected by the NOx catalyst temperature sensor is within a target temperature range, and selects the second predetermined value when the detected temperature of the NOx catalyst is lower than the target temperature range. Further, the ECU selects the third predetermined values when the detected temperature of the NOx catalyst is higher than the target temperature range.
    Type: Application
    Filed: February 27, 2008
    Publication date: August 28, 2008
    Applicant: Honda Motor Co., Ltd.
    Inventors: Nobuhiro Komatsu, Norio Suzuki
  • Publication number: 20080148714
    Abstract: An exhaust control system for an internal combustion engine provided with an exhaust gas processing device and a NOx purifying catalyst which are arranged in series in an exhaust system, comprises: a first temperature detector for detecting a temperature of the exhaust gas processing device; a second temperature detector for detecting a temperature of the NOx purifying catalyst; a control means for controlling an exhaust temperature to conduct a regeneration process for removing sulfur contents trapped by the NOx purifying catalyst; and a control mode selection means for selecting one of a plurality of exhaust temperature control modes according to a relationship between an output from the first temperature detector and an output from the second temperature detector, wherein the control means conducts exhaust temperature control according to the control mode selected by the control mode selection means.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 26, 2008
    Applicant: Honda Motor Co., Ltd.
    Inventors: Nobuhiro Komatsu, Norio Suzuki
  • Publication number: 20080120964
    Abstract: An exhaust gas purifying device for an internal combustion engine, comprises: a first catalyst (TWC 7, example) having a reducing capability; a second catalyst (LNC 9, example) provided downstream of the first catalyst, the second catalyst is adapted to trap NOx in a lean condition of air fuel ratio of an exhaust gas and reduce the trapped NOx in a rich condition of air fuel ratio of the exhaust gas; and an exhaust air fuel ratio control means for controlling an exhaust air fuel ratio to decrease the NOx in the first and second catalysts, wherein the exhaust air fuel ratio control means conducts NOx decreasing control suitable for the first catalyst when the second catalyst is in an inactive state and the first catalyst is in an active state, and wherein the exhaust air fuel ratio control means conducts NOx decreasing control suitable for the second catalyst after the second catalyst is activated.
    Type: Application
    Filed: October 31, 2007
    Publication date: May 29, 2008
    Applicant: Honda Motor Co., Ltd
    Inventors: Norio Suzuki, Nobuhiro Komatsu, Tomoko Morita, Hisao Haga
  • Publication number: 20080028749
    Abstract: In a control device for an internal combustion engine provided with a NOX catalytic converter in an exhaust passage thereof, the progress of sulfur purging is computed from the consumption of reducing agent contained in the exhaust gas in the NOX catalytic converter. This computation may be based on the air fuel ratio of exhaust gas upstream of the NOX catalytic converter and the estimated consumption of the reducing agent contained in the exhaust gas or on the difference between the air fuel ratios of exhaust gas upstream and downstream of the NOX catalytic converter. In either case, the accuracy can be improved by taking into account the space velocity of the exhaust gas.
    Type: Application
    Filed: July 31, 2007
    Publication date: February 7, 2008
    Inventors: Hisao Haga, Norio Suzuki, Katsuji Wada, Nobuhiro Komatsu
  • Patent number: 5529143
    Abstract: An engine room structure of an automotive vehicle is provided with a power transmission unit consisting of, for example, a transfer, between a pair of left-hand and right-hand front side frames, a front axle extending outside from the power transmission unit in the transverse direction of the vehicle body. The steering rack functioning as an element of the front-wheel steering mechanism is so disposed within the engine room as to extend in the transverse direction of the vehicle body and as to lie in the position underneath the spower transmission unit. In other words, the power transmission unit is disposed in the position above the steering rack. This arrangement for the power transmission unit and the steering rack can provide a space between them, thereby lowering the positions of the front side frames.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: June 25, 1996
    Assignee: Mazda Motor Corporation
    Inventors: Nobuhiro Komatsu, Satoshi Fujita, Yukiichiro Shimada, Masayoshi Sannomiya
  • Patent number: 5195607
    Abstract: A dual type exhaust system is used in an automobile having an internal combustion engine with transversely mounted front and rear rows of cylinders. Two exhaust pipe assemblies extend from the front and rear rows of cylinders, respectively, toward the back of the car body. The two assemblies are arranged side by side in a space formed in a floor panel. The exhaust pipe assemblies are, respectively, provided with catalytic converters offset in a lengthwise direction of the car body with respect to the space relative to each other so as to be arranged in a straight line in the space.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: March 23, 1993
    Assignee: Mazda Motor Corporation
    Inventors: Yukiichiro Shimada, Nobuhiro Komatsu, Seiichi Tsuji, Satoshi Fujita, Hiroshi Nakatsuka, Hiromichi Kawamura, Makoto Shinhama
  • Patent number: 5127704
    Abstract: An automobile lower body structure includes a floor panel having a tunnel structure extending longitudinally of a vehicle body at a location substantially centrally thereof, a dashboard lower panel secured to the front end of the floor panel, and a dashboard lower cross member extending transversely of the vehicle body and secured to the lower surface of the dashboard lower panel. The dashboard lower cross member has opposite ends secured to respective of two front side frames extending longitudinally of the vehicle body at opposite sides thereof, and a rearwardly extending intermediate portion partitioning the inside of the tunnel structure so that a closed cross section is formed at an upper portion within the tunnel structure.
    Type: Grant
    Filed: March 6, 1991
    Date of Patent: July 7, 1992
    Assignee: Mazda Motor Corporation
    Inventor: Nobuhiro Komatsu
  • Patent number: 5127666
    Abstract: A vehicle rear suspension mounting structure for mounting, to a vehicle body, the other end of a rear suspension. The rear suspension includes a suspension link, one end of which is coupled to a wheel support member for rotatably supporting a vehicle wheel and which extends substantially in a longitudinal direction of the vehicle body. The mounting structure has a vehicle body coupling end formed on the other end of the suspension link, a link bracket for supporting the vehicle body coupling end, and a joint member for joining the link bracket to a rear quarter panel constituting a rear wheel house portion.
    Type: Grant
    Filed: July 17, 1990
    Date of Patent: July 7, 1992
    Assignee: Mazda Motor Corporation
    Inventors: Mitsuru Fujinaka, Nobuhiro Komatsu, Motoharu Sato, Toshiro Kondo, Eiichiro Iida
  • Patent number: 5102164
    Abstract: A vehicle suspension mounting structure for mounting a suspension device to a vehicle body. At least the upper arm of the suspension device is constituted by two link members disposed to be spaced apart by a predetermined distance in the vertical direction of the body with respect to a vehicle wheel support member. The suspension mounting structure includes a mounting member for mounting the rear end of the upper link member to an upper frame extending along the back-and-forth direction of the vehicle body.
    Type: Grant
    Filed: July 17, 1990
    Date of Patent: April 7, 1992
    Assignee: Mazda Motor Corporation
    Inventors: Mitsuru Fujinaka, Nobuhiro Komatsu, Masayoshi Sannomiya, Toshiro Kondo
  • Patent number: 5087074
    Abstract: A is a vehicle suspension mounting structure for mounting a suspension device to a vehicle body. At least the upper arm of the suspension device is constituted by two link members disposed to be spaced apart by a predetermined distance in the vertical direction of the vehicle body with respect to a vehicle wheel support member. The suspension mounting structure includes a mounting mechanism for mounting the rear end of the upper link member to a dash panel.
    Type: Grant
    Filed: July 9, 1990
    Date of Patent: February 11, 1992
    Assignee: Mazda Motor Corporation
    Inventors: Nobuhiro Komatsu, Mitsuru Fujinaka, Masayoshi Sannomiya, Toshiro Kondo, Atsushi Nishiyama
  • Patent number: 4940281
    Abstract: A front body structure of a vehicle includes a pair of retractable head lamps, a pair of retractable head lamp covers for covering the retractable head lamps, a pair of drive motors for driving the retractable head lamps and the retractable head lamp covers, a radiator shroud upper member disposed on a front side of an engine compartment and extending laterally with respect to a vehicle body, a cross member disposed below the radiator shroud upper member and extending laterally with respect to the vehicle body, and two side connecting members for connecting the radiator shroud upper member with the cross member, each of the drive motors being mounted on one of the side connecting members.
    Type: Grant
    Filed: November 14, 1988
    Date of Patent: July 10, 1990
    Assignee: Mazda Motor Corporation
    Inventor: Nobuhiro Komatsu