Patents by Inventor Hiroshi Katoh

Hiroshi Katoh 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: 6571775
    Abstract: In a four-stroke cycle multi-cylinder internal combustion engine (2), a controller (1) controls fuel injectors (8) to inject fuel for the cylinder (#1) in the intake stroke immediately after the first cylinder-stroke identification is performed. Due to this fuel injection control, the fuel is necessarily injected before the first combustion occasion at any cylinder (#1-#4), cylinder dependent fluctuation of air-fuel ratio when the first combustion takes place in the respective cylinders (#1-#4) is prevented. Further, in a predetermined low temperature range, the controller (1) controls fuel injectors (8) to perform a preliminary fuel injection for all the cylinders (#1-#4) before the first cylinder-stroke identification, so the fuel amount required for the first combustion is ensured for all the cylinders (#1-#4).
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: June 3, 2003
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Ritsuo Sato, Masahiko Yuya, Hiroshi Katoh, Takahisa Koseki
  • Patent number: 6568373
    Abstract: An internal combustion engine (2) provided with a starter motor sequentially performs combustion of fuel in a plurality of cylinders (#1-#4). Each cylinder is provided with an intake port (7) and a fuel injector (8) to inject fuel in the intake port (7) and repeatedly performs an intake stroke, compression stroke, expansion stroke and an exhaust stroke. A sensor (9, 11) generates a signal identifying a cylinder in a specific position in a specific stroke and the controller (1) executes a cylinder-stroke identification in response to the signal. Upon the first execution of the cylinder-stroke identification when the engine is cranked, a fuel injection is performed for a cylinder in the intake stroke and for a cylinder in the exhaust stroke simultaneously so as to ensure the fuel supply amount required for the first combustion in each cylinder.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: May 27, 2003
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Masahiko Yuya, Ritsuo Sato, Hiroshi Katoh, Takahisa Koseki
  • Patent number: 6568371
    Abstract: A fuel injection control device for an internal combustion engine is provided with a controller functions to command the fuel injectors for a cylinder in the exhaust stroke and for a cylinder in the intake stroke to simultaneously perform a primary fuel injection, when the first cylinder-stroke identification is performed, if the engine temperature is higher than a predetermined temperature. The controller further functions to command the fuel injector only for a cylinder in the intake stroke to perform a primary fuel injection, when the first cylinder-stroke identification is performed, if the engine temperature is less than the predetermined temperature. Thus the startup time of the engine is shortened and the stability of startup is ensured at normal, low, or extremely low temperatures.
    Type: Grant
    Filed: August 14, 2002
    Date of Patent: May 27, 2003
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Ritsuo Sato, Masahiko Yuya, Hiroshi Katoh, Takahisa Koseki
  • Publication number: 20030066518
    Abstract: A state quantity &sgr;(n) of a switching function is calculated based on a predetermined target air-fuel ratio TGABF, a detected air-fuel ratio AFSAF detected by a sensor (16), and a state equation derived from a transfer function Geng(q) of a secondary discrete system, representing the correlation between an air-fuel ratio of an air fuel mixture in a combustion chamber (1A) and the detected air-fuel ratio (S14). The air-fuel ratio is feedback corrected by applying a sliding mode control process based on the difference between the target air-fuel ratio TGABF and the detected air-fuel ratio AFSAF, and the state quantity &sgr;(n) (S14-S21). The response and robustness of the air-fuel ratio control are enhanced by using a physical model of the secondary discrete system.
    Type: Application
    Filed: June 14, 2002
    Publication date: April 10, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventor: Hiroshi Katoh
  • Publication number: 20030065438
    Abstract: A fuel injector (5) injects fuel to generate an air-fuel mixture that is burnt in the engine (1), and a sensor (16) detects an air-fuel ratio of the air-fuel mixture from an exhaust gas composition of the engine (1). A controller (11) calculates a dead time representing a lag between the air-fuel ratio variation of the air-fuel mixture and the air-fuel ratio variation detected by the sensor (16), and calculates an estimated state quantity by applying a dead time compensation according to Smith method and a disturbance compensation to the air-fuel ratio detected by the sensor (16). By determining an air-fuel ratio feedback correction amount based on the estimated state quantity applying a sliding mode control process, the response and stability of air-fuel ratio control is improved.
    Type: Application
    Filed: June 21, 2002
    Publication date: April 3, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventor: Hiroshi Katoh
  • Publication number: 20030037771
    Abstract: An internal combustion engine (2) provided with a starter motor sequentially performs combustion of fuel in a plurality of cylinders (#1-#4). Each cylinder is provided with an intake port (7) and a fuel injector (8) to inject fuel in the intake port (7) and repeatedly performs an intake stroke, compression stroke, expansion stroke and an exhaust stroke. A sensor (9, 11) generates a signal identifying a cylinder in a specific position in a specific stroke and the controller (1) executes a cylinder-stroke identification in response to the signal. Upon the first execution of the cylinder-stroke identification when the engine is cranked, a fuel injection is performed for a cylinder in the intake stroke and for a cylinder in the exhaust stroke similtaneously so as to ensure the fuel supply amount required for the first combustion in each cylinder.
    Type: Application
    Filed: August 12, 2002
    Publication date: February 27, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Masahiko Yuya, Ritsuo Sato, Hiroshi Katoh, Takahisa Koseki
  • Publication number: 20030034012
    Abstract: In a four-stroke cycle multi-cylinder internal combustion engine (2), a controller (1) controls fuel injectors (8) to inject fuel for the cylinder (#1) in the intake stroke immediately after the first cylinder-stroke identification is performed. Due to this fuel injection control, the fuel is necessarily injected before the first combustion occasion at any cylinder (#1-#4), cylinder dependent fluctuation of air-fuel ratio when the first combustion takes place in the respective cylinders (#1-#4) is prevented. Further, in a predetermined low temperature range, the controller (1) controls fuel injectors (8) to perform a preliminary fuel injection for all the cylinders (#1-#4) before the first cylinder-stroke identification, so the fuel amount required for the first combustion is ensured for all the cylinders (#1-#4).
    Type: Application
    Filed: August 12, 2002
    Publication date: February 20, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Ritsuo Sato, Masahiko Yuya, Hiroshi Katoh, Takahisa Koseki
  • Publication number: 20030034008
    Abstract: In order to improve the control characteristics for ignition timing during transient operating conditions including engine startup, during engine transient operating conditions, a controller (1) sets an advance limit ADVLMT restricting the maximum value of the ignition timing advance to a limit ADMLMTS which is a large value when compared to the value for steady-state operating conditions. Furthermore during transient operating conditions, the dwell angle TDWLLB is also increased and the correlation of the ignition timing control with respect to a suitable ignition timing is improved.
    Type: Application
    Filed: August 12, 2002
    Publication date: February 20, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Hiroshi Katoh, Ritsuo Sato, Masahiko Yuya
  • Publication number: 20030034013
    Abstract: A fuel injection control device for an internal combustion engine is provided with a controller functions to command the fuel injectors for a cylinder in the exhaust stroke and for a cylinder in the intake stroke to simultaneously perform a primary fuel injection, when the first cylinder-stroke identification is performed, if the engine temperature is higher than a predetermined temperature. The controller further functions to command the fuel injector only for a cylinder in the intake stroke to perform a primary fuel injection, when the first cylinder-stroke identification is performed, if the engine temperature is less than the predetermined temperature. Thus the startup time of the engine is shortened and the stability of startup is ensured at normal, low, or extremely low temperatures.
    Type: Application
    Filed: August 14, 2002
    Publication date: February 20, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Ritsuo Sato, Masahiko Yuya, Hiroshi Katoh, Takahisa Koseki
  • Publication number: 20030034009
    Abstract: The startup time of an engine is shortened by performing initial fuel injection after the start of cranking on a cylinder undergoing an intake stroke and a cylinder undergoing an exhaust stroke. After the initial fuel injection, HC emissions are suppressed by performing fuel injection in cylinders undergoing an exhaust stroke. Furthermore when it is determined that initial combustion has not occurred after the initial fuel injection, an additional injection is performed on the cylinder undergoing an intake stroke. In this manner, it is possible to minimize increases in the startup time and adverse effects on exhaust emissions.
    Type: Application
    Filed: August 14, 2002
    Publication date: February 20, 2003
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Masahiko Yuya, Ritsuo Sato, Hiroshi Katoh, Takahisa Koseki
  • Patent number: 6363313
    Abstract: A fuel property detecting system comprises a control unit coupled to a fuel injector and an air-fuel ratio sensor. The control unit is arranged to sample data of a response wave-form of an exhaust air-fuel ratio in response to an injected fuel quantity at a transient period, to identify a plant model as to fuel in use by controlling a parameter of a previously constructed plant model on the basis of the input and output data so as to decrease a prediction error between the plant model and a norm model, to calculate a cutoff frequency of the identified plant model, and to estimate a fuel property of the fuel in use from the calculated cutoff frequency of the identified plant model and data previous stored in the control unit.
    Type: Grant
    Filed: April 6, 2000
    Date of Patent: March 26, 2002
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Hiroshi Katoh, Shigeaki Kakizaki, Takane Hayashi
  • Patent number: 6250282
    Abstract: With an electronically controlled throttle type internal combustion engine, where a target opening of a throttle valve is set according to a required output of the engine, and the throttle valve is opened and closed with an actuator so as to obtain a target opening; air quantity learning for learning and correcting the target opening of the throttle valve so as to obtain a target intake air quantity is performed by comparing an intake air quantity estimated based on a detection value of the throttle valve opening and an actually detected intake air quantity, at the time of idling the engine. After completion of the air quantity learning, friction learning for learning and correcting the target opening of the throttle valve so as to obtain a target engine output is performed while feedback controlling the throttle valve opening so that the engine rotation speed approaches a target idle rotation speed, at the time of idling the engine.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: June 26, 2001
    Assignees: Unisia Jecs Corporation, Nissan Motor Co., Ltd.
    Inventors: Hiroyuki Osaki, Hajime Hosoya, Hiroshi Katoh, Shigeaki Kakizaki, Mikio Matsumoto
  • Patent number: 6249049
    Abstract: A ceramic package type electronic part for accommodating an electronic device includes a ceramic package body, an electrode, and a conductive adhesive. The electrode is disposed for the ceramic package body and is to be bonded to the electronic device. The conductive adhesive bonds the electronic device and the electrode to each other. The conductive adhesive is provided to be extended to a specific surface portion of a surface portion of the ceramic package body, from a bonding portion of the electronic device and the electrode.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: June 19, 2001
    Assignee: NEC Corporation
    Inventors: Hiroshi Kamada, Naoharu Fukuhara, Katuya Terai, Hiroshi Katoh
  • Patent number: 5606061
    Abstract: The present invention provides a thioformamide derivative represented by the following general formula (I) or a pharmacologically acceptable salt thereof, which is highly safe, easy to use, and useful as an excellent hypotensive or heart disease remedy: ##STR1## wherein Y represents ##STR2## or the like [wherein R.sup.7 represents benzyloxy or the like; R.sup.11 and R.sup.12 each represent hydrogen, hydroxyl, benzoyloxy, benzyloxy, ##STR3## (wherein R.sup.14 and R.sup.15 each represent hydrogen, benzyl or the like) or the like];Z represents --CH.sub.2 -- or the like; A represents imidazolyl or imidazopyridyl which may have one or two substituents, or the like; R.sup.1 and R.sup.2 each represent hydrogen, lower alkyl or the like; and R.sup.3 and R.sup.4 each represent hydrogen, lower alkyl or the like.
    Type: Grant
    Filed: September 20, 1995
    Date of Patent: February 25, 1997
    Assignee: Eisai Co., Ltd.
    Inventors: Yasuhiro Kabasawa, Fumihiro Ozaki, Keiji Ishibashi, Takashi Hasegawa, Hitoshi Oinuma, Toshiaki Ogawa, Hideyuki Adachi, Hiroshi Katoh, Kohtarou Kodama, Hideto Ohara, Nobuyuki Mori, Norio Minami
  • Patent number: 5498634
    Abstract: The present invention provides a thioformamide derivative represented by the following general formula (I) or a pharmacologically acceptable salt thereof, which is highly safe, easy to use, and useful as an excellent hypotensive or heart disease remedy: ##STR1## wherein Y represents ##STR2## or the like [wherein R.sup.7 represents benzyloxy or the like; R.sup.11 and R.sup.12 each represent hydrogen, hydroxyl, benzoyloxy, benzyloxy, ##STR3## (wherein R.sup.14 and R.sup.15 each represent hydrogen, benzyl or the like) or the like];Z represents --CH.sub.2 -- or the like; A represents imidazolyl or imidazopyridyl which may have one or two substituents, or the like; R.sup.1 and R.sup.2 each represent hydrogen, lower alkyl or the like; and R.sup.3 and R.sup.4 each represent hydrogen, lower alkyl or the like.
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: March 12, 1996
    Assignee: Eisai Co., Ltd.
    Inventors: Yasuhiro Kabasawa, Fumihiro Ozaki, Keiji Ishibashi, Takashi Hasegawa, Hitoshi Oinuma, Toshiaki Ogawa, Hideyuki Adachi, Hiroshi Katoh, Kohtarou Kodama, Hideto Ohara, Nobuyuki Mori, Norio Minami
  • Patent number: 5444066
    Abstract: The present invention provides a thioformamide derivative represented by the following general formula (I) or a pharmacologically acceptable salt thereof, which is highly safe, easy to use, and useful as an excellent hypotensive or heart disease remedy: ##STR1## wherein Y represents ##STR2## or the like [wherein R.sup.7 represents benzyloxy or the like; R.sup.11 and R.sup.12 each represent hydrogen, hydroxyl, benzoyloxy, benzyloxy, ##STR3## (wherein R.sup.14 and R.sup.15 each represent hydrogen, benzyl or the like) or the like];Z represents --CH.sub.2 -- or the like; A represents imidazolyl or imidazopyridyl which may have one or two substituents, or the like; R.sup.1 and R.sup.2 each represent hydrogen, lower alkyl or the like; and R.sup.3 and R.sup.4 each represent hydrogen, lower alkyl or the like.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: August 22, 1995
    Assignee: Eisai Co., Ltd.
    Inventors: Yasuhiro Kabasawa, Fumihiro Ozaki, Keiji Ishibashi, Takashi Hasegawa, Hitoshi Oinuma, Toshiaki Ogawa, Hideyuki Adachi, Hiroshi Katoh, Kohtarou Kodama, Hideto Ohara, Nobuyuki Mori, Norio Minami
  • Patent number: 5422466
    Abstract: This invention relates to a revolution indicator housed inside a casing. The indicator has a plurality of wheels with the numerals 0-9 on the outer periphery of the wheels. The numerals are viewed through a window from the outside of the casing. Each wheel is also encoded magnetically such that each wheels' rotational position can be determined electronically. The rotational position of each wheel can be displayed electronically at a remote location outside the casing.
    Type: Grant
    Filed: March 22, 1994
    Date of Patent: June 6, 1995
    Assignee: Wako Seiki Kabushiki Kaisha
    Inventors: Masahiro Saitoh, Hiroshi Katoh
  • Patent number: 5351565
    Abstract: In an engine used for a portable working apparatus such as a brush cutter, there are arranged a drive gear rotated by a starter motor, and a driven gear engaging with the drive gear and connected to a crankshaft through a nonreturn clutch. The driven gear is fixed to the crankshaft until the starter motor starts the engine and released from the crankshaft after the start of the engine and after a rotational speed of the crankshaft exceeds that of the starter motor.
    Type: Grant
    Filed: September 13, 1993
    Date of Patent: October 4, 1994
    Assignee: Komatsu Zenoah Kabushiki Kaisha
    Inventors: Minoru Wada, Yoshiaki Tanaka, Hiroshi Katoh, Hiroshi Taguchi
  • Patent number: 5216498
    Abstract: An image processing apparatus including an image input circuit for reading color images obtained by separating each pixel of an an original image into three color components a color data-forming circuit for forming color data for identifying a color of each of the pixels as either a white color, an achromatic color or a chromatic color on the basis of the color images, a color-reproducing circuit for converting the color images into density data corresponding to plural recording colors, and a marked region-detecting circuit for detecting a marked portion on the basis of the color data formed by the color data-forming circuit and for extracting a region enclosed by the marked portion.
    Type: Grant
    Filed: April 3, 1992
    Date of Patent: June 1, 1993
    Assignee: Konica Corporation
    Inventors: Masahiko Matsunawa, Hiroshi Katoh
  • Patent number: 5159845
    Abstract: In an engine used for a portable working apparatus such as a brush cutter, there are arranged a drive gear rotated by a starter motor, and a driven gear engaging with the drive gear and connected to a crankshaft through a nonreturn clutch. The driven gear is fixed to the crankshaft until the starter motor starts the engine and released from the crankshaft after the start of the engine and after a rotational speed of the crankshaft exceeds that of the starter motor.
    Type: Grant
    Filed: November 10, 1989
    Date of Patent: November 3, 1992
    Assignee: Komatsu Zenoah Kabushiki Kaisha
    Inventors: Minoru Wada, Yoshiaki Tanaka, Hiroshi Katoh, Hiroshi Taguchi