Patents by Inventor Toshio Ogawa
Toshio Ogawa 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: 6161378Abstract: An exhaust gas purification apparatus for use in an internal combustion engine comprises an exhaust gas duct connected to the engine through which exhaust gas containing NO.sub.x gas passes, and a catalyst disposed in the exhaust gas duct such that it contacts the exhaust gas. The catalyst chemically adsorbs NO.sub.x when a stoichiometric amount of a gaseous oxidizing agent present in the exhaust gas is larger than that of a gaseous reducing agent present in the exhaust gas for reducing NO.sub.x, adsorbed NO.sub.x is catalytically reduced in the presence of a reducing agent when the stoichiometric amount of the oxidizing agent is not larger that of the reducing agent.Type: GrantFiled: December 10, 1998Date of Patent: December 19, 2000Assignee: Hitachi, Ltd.Inventors: Hiroshi Hanaoka, Osamu Kuroda, Ryouta Doi, Hidehiro Iizuka, Toshio Ogawa, Hisao Yamashita, Shigeru Azuhata, Yuichi Kitahara, Toshifumi Hiratsuka, Kojiro Okude, Norihiro Shinotsuka, Toshio Manaka
-
Patent number: 6144571Abstract: In order to bring a moduled power converter into less size and cost in the case of a structure having a lead-insert-case, an insulated metal circuit board and a printed circuit board, a difficulty was encountered in thinning a wiring width and an increase in pad area for each metal wire has interfered with a reduction in its size and cost.In the present invention to cope with it, a power converter is constructed by using a semiconductor module having such a structure that a metal base and lead frames are adhered to each other in a state in which an insulating adhesive sheet is interposed therebetween, a resin-molded outer package is adhered to the metal base with an adhesive or the like, and a resin sealing agent is charged into the resin-molded outer package to thereby integrally seal the resin-molded outer package and circuit parts such as semiconductor elements implemented therein, whereby a reduction in size and cost thereof is realized.Type: GrantFiled: February 17, 2000Date of Patent: November 7, 2000Assignee: Hitachi, Ltd.Inventors: Yasushi Sasaki, Yutaka Maeno, Hiroshi Fujii, Kinya Nakatsu, Toshio Ogawa, Akihiro Tamba, Kazuji Yamada
-
Patent number: 6108755Abstract: The present invention relates to an asynchronous access system for accessing a shared storage in a multiprocessor system in which a plurality of processor modules and shared storage modules are connected through a system bus. The present invention accesses the shared storage at a high speed and reduces the overhead of the system bus. The present invention recognizes in write and read instructions serial access addresses of the shared storage, requests a block access in which a predetermined number of words are grouped as one block, and performs a recovery process when a write instruction is executed abnormally in the block access.Type: GrantFiled: May 18, 1992Date of Patent: August 22, 2000Assignee: Fujitsu LimitedInventors: Akira Kabemoto, Toshio Ogawa, Masashi Shirotani
-
Patent number: 6093377Abstract: Exhaust gas from internal combustion engines is treated with catalyst comprising an inorganic oxide supporter which supports at least one of noble metals selected from Rh, Pt, and Pd, alkali rare earth metals, rare earth metals, and magnesium in order to remove NOx effectively with superior durability of the catalyst notwithstanding the internal combustion engine is under a stoichiometric operation condition or a lean burning operation condition.Type: GrantFiled: January 11, 1996Date of Patent: July 25, 2000Assignee: Hitachi, Ltd.Inventors: Hidehiro Iizuka, Osamu Kuroda, Toshio Ogawa, Akira Kato, Hiroshi Miyadera, Yuichi Kitahara, Hiroatsu Tokuda
-
Patent number: 6045764Abstract: An exhaust gas purifying catalyst is provided for purifying NOx contained in an exhaust gas from an internal combustion engine of a vehicle operated at a high air fuel ratio due to excessive oxygen, using unburnt HC or CO in the exhaust gas as a reducing agent. The catalyst comprises platinum, strontium and a rare earth metal, as active components, each supported on a support of inorganic oxide. The active components of the catalyst include platinum of 0.01-3.7 by wt ratio, strontium of 0.01-55 by wt ratio and a rare earth metal of 0.01-36 wt ratio, per the inorganic oxide of 100 by wt ratio.Type: GrantFiled: April 29, 1996Date of Patent: April 4, 2000Assignee: Hitachi, Ltd.Inventors: Hidehiro Iizuka, Osamu Kuroda, Toshio Ogawa, Hisao Yamashita, Shigeru Azuhata, Yuichi Kitahara, Takeshi Atago, Hiroatsu Tokuda, Takao Ishikawa, Hiroshi Hanaoka, Hiroshi Tobita, Shinichi Ichikawa, Toshifumi Hiratsuka
-
Patent number: 5972828Abstract: In order to remove nitrogen oxide in an exhaust gas released from a lean burn engine, a catalyst: supporting an rare earth metal, an alkali earth metal, titanium, a noble metal, and magnesium on the surface of a porous carrier made of inorganic oxides is provided. In order to manufacture the catalyst, the rare earth metal is supported onto the surface of the carrier first, subsequently the alkali earth metal other than magnesium and titanium are supported, the noble metal is supported, and magnesium is supported finally onto the surface of the carrier.The catalyst of the present invention is scarcely poisoned by SOx in the exhaust gas released from the lean burn engine, and has a heat resistivity durable against high speed driving.Type: GrantFiled: October 3, 1997Date of Patent: October 26, 1999Assignee: Hitachi, Ltd.Inventors: Ryouta Doi, Hidehiro Iizuka, Hiroshi Hanaoka, Toshio Ogawa, Osamu Kuroda, Hisao Yamashita, Yuichi Kitahara, Toshifumi Hiratsuka
-
Patent number: 5968870Abstract: A catalyst being formed of a porous supporter supporting alkali metals, Ti and a noble metal, or further supporting at least one of rare earth metal and magnesium, being disposed in a flow passage of an internal combustion engine, and being used to purify NOx contained in the exhaust gas. The above catalyst has NOx resistance to exhaust gas burnt with a rich condition and with a lean condition and a high resistivity to poisoning by SOx.Type: GrantFiled: October 27, 1997Date of Patent: October 19, 1999Assignee: Hitachi, Ltd.Inventors: Hidehiro Iizuka, Ryouta Doi, Hiroshi Hanaoka, Toshio Ogawa, Osamu Kuroda, Hisao Yamashita, Shigeru Azuhata, Yuichi Kitahara, Norihiro Shinotsuka
-
Patent number: 5963976Abstract: A shared storage configuration system for use in a computer system includes a plurality of processing modules. Each of the processing modules includes at least a main storage unit, a central processing unit and a connecting unit for connection to a system bus. The shared storage system also includes a plurality of shared storage modules. Each of the shared storage modules includes a shared storage unit and a connection unit for connection to the system bus. A space inherent in the processing modules is accessible by physical addresses of said central processing unit of each of the processing modules. A shared storage space is accessible by the physical addresses of said central processing unit of each of the processing modules.Type: GrantFiled: April 21, 1995Date of Patent: October 5, 1999Assignee: Fujitsu LimitedInventors: Toshio Ogawa, Akira Kabemoto, Katsuhiko Shioya
-
Patent number: 5937637Abstract: A system for purifying an exhaust gas for use in an automobile is disclosed which does not externally discharge unburnt hydrocarbons until a catalyst becomes active. An adsorbent is provided upstream of the catalyst. A heat exchanger is disposed between an upstream portion of the adsorbent and a portion between the adsorbent and the catalyst for controlling the elevation of the temperature of the adsorbent and for promoting the elevation of the temperature of the catalyst. The unburnt hydrocarbons are absorbed by the adsorbent 4 in the initial period of time from starting of an engine until the catalyst 8 becomes active. Temperature control is made in such a manner that the unburnt hydrocarbons which are adsorbed by the adsorbent 4 begins to be desorbed therefrom substantially simultaneously with the time when the catalyst 8 begins to function.Type: GrantFiled: July 5, 1996Date of Patent: August 17, 1999Assignee: Hitachi, Ltd.Inventors: Masakatsu Fujishita, Takeshi Atago, Akio Honji, Osamu Kuroda, Toshio Ogawa, Noriko Watanabe, Minoru Osuga
-
Patent number: 5890218Abstract: A shared storage configuration system for use in a computer system includes a plurality of processing modules and a plurality of shared storage modules. Each of the processing modules has at least a main storage unit, a central processing unit, and a connection unit for connection to a system bus. Each of the shared storage modules has a shared storage unit and a connection unit for connection to the system bus. A space inherent in the processing modules is accessible by physical addresses of the central processing units. The shared storage space is accessible either in program mode by the physical addresses of the central processing units or in direct memory access mode by relative addresses translated from the physical addresses output by the central processing units.Type: GrantFiled: October 20, 1997Date of Patent: March 30, 1999Assignee: Fujitsu LimitedInventors: Toshio Ogawa, Akira Kabemoto, Katsuhiko Shioya
-
Patent number: 5577383Abstract: An apparatus for purifying an exhaust gas emitted from an internal combustion engine, particularly, immediately after starting of the engine, includes a mechanism for reducing the time required to heat a catalyst converter to the activation temperature. The exhaust gas is passed through a preliminary catalyst close to the engine and then through a main catalyst downstream of the catalyst. The engine is operated with an air-fuel mixture which is richer than the amount indicated by the stoichiometric air/fuel ratio for a period of time from when engine is started until the main catalyst is heated to a temperature at which the catalyst can sufficiently perform its purifying capability. The preliminary catalyst is enabled to function at lower temperatures by combusting the exhaust gas which is generated during a rich air-fuel mixture condition. The main catalyst can be heated with the generated combustion heat, resulting in an enhancement in exhaust gas purifying capability.Type: GrantFiled: November 30, 1994Date of Patent: November 26, 1996Assignee: Hitachi, Ltd.Inventors: Osamu Kuroda, Hisao Yamashita, Akio Honji, Noriko Watanabe, Toshio Ogawa, Hiroshi Miyadera, Takeshi Atago
-
Patent number: 5560201Abstract: A system for purifying an exhaust gas for use in an automobile is disclosed which does not externally discharge unburnt hydrocarbons until a catalyst becomes active. An adsorbent is provided upstream of the catalyst. A heat exchanger is disposed between an upstream portion of the adsorbent and a portion between the adsorbent and the catalyst for controlling the elevation of the temperature of the adsorbent and for promoting the elevation of the temperature of the catalyst. The unburnt hydrocarbons are absorbed by the adsorbent in the initial period of time from starting of an engine until the catalyst becomes active. Temperature control is made in such a manner that the unburnt hydrocarbons which are adsorbed by the adsorbent begins to be desorbed therefrom substantially simultaneously with the time when the catalyst begins to function.Type: GrantFiled: February 1, 1995Date of Patent: October 1, 1996Assignee: Hitachi, Ltd.Inventors: Masakatsu Fujishita, Takeshi Atago, Akio Honji, Osamu Kuroda, Toshio Ogawa, Noriko Watanabe, Minoru Osuga
-
Patent number: 5517820Abstract: An apparatus is provided for purifying an exhaust gas discharged from an internal combustion engine, which comprises a first exhaust gas passage including a nitrogen oxide removing catalyst and a three way catalyst, a second exhaust gas passage including the three way catalyst, a gas flow regulator for selectively directing the exhaust gas to the first and second exhaust gas passages, and a control unit which directs the exhaust gas to the first exhaust gas passage (thereby passing exhaust gas first through the nitrogen oxide removing catalyst and thereafter through the three way catalyst) when the temperature of the nitrogen oxide removing catalyst is within a hydrocarbon adsorbing range of temperature thereof while the engine is warming up, and to the second exhaust gas passage (thereby passing the exhaust gas only through the three way catalyst) when the temperature of the nitrogen oxide removing catalyst exceeds the hydrocarbon adsorbing range of temperature thereof.Type: GrantFiled: March 17, 1994Date of Patent: May 21, 1996Assignee: Hitachi, Ltd.Inventors: Osamu Kuroda, Takahiro Tachi, Miho Saito, Toshio Ogawa, Noriko Watanabe, Akira Kato, Hiroshi Miyadera
-
Patent number: 5449933Abstract: A ferroelectric thin film element 1 constructed by forming a MgO thin film 3 oriented in the direction (100), a lower electrode 4 composed of an alloy thin film of a Ni--Cr--Al system oriented in the direction (100), a ferroelectric thin film 5 composed of a PbTiO.sub.3 thin film oriented in the direction (111), and an upper electrode 6 in this order on a substrate composed of (100) silicon 2.Type: GrantFiled: March 30, 1993Date of Patent: September 12, 1995Assignee: Murata Mfg. Co., Ltd.Inventors: Satoshi Shindo, Toshio Ogawa, Atsuo Senda, Tohru Kasanami
-
Patent number: 5388405Abstract: A system for purifying an exhaust gas for use in an automobile is disclosed which does not externally discharge unburnt hydrocarbons until a catalyst becomes active. An adsorbent is provided upstream of the catalyst. A heat exchanger is disposed between an upstream portion of the adsorbent and a portion between the adsorbent and the catalyst for controlling the elevation of the temperature of the adsorbent and for promoting the elevation of the temperature of the catalyst. The unburnt hydrocarbons are absorbed by the adsorbent in the initial period of time from starting of an engine until the catalyst becomes active. Temperature control is made in such a manner that the unburnt hydrocarbons which are adsorbed by the adsorbent begins to be desorbed therefrom substantially simultaneously with the time when the catalyst begins to function.Type: GrantFiled: September 30, 1992Date of Patent: February 14, 1995Assignee: Hitachi, Ltd.Inventors: Masakatsu Fujishita, Takeshi Atago, Akio Honji, Osamu Kuroda, Toshio Ogawa, Noriko Watanabe, Minoru Osuga
-
Patent number: 5379586Abstract: An exhaust gas cleaning system has a catalyzer provided in the exhaust passage of the engine and an adsorbent provided upstream from the catalyzer. The adsorbent temporarily adsorbs unburned hydrocarbons emitted in large amounts immediately after the engine is started. The system provides an amount of air required to substantially eliminate unburned hydrocarbons, based on the temperature of the adsorbent and the oxygen concentration in exhaust gas upstream from the catalyzer. An air supplying unit is provided upstream from the adsorbent. A temperature sensor is provided for the adsorbent. An oxygen sensor is provided at the inlet of the catalyzer. A control unit calculates the amount of air (oxygen) necessary for the catalyzer to convert the unburned hydrocarbons released from the adsorbent, based on signals from the temperature sensor and the oxygen sensor and the exhaust flow rate. The control unit accordingly controls the air supplying unit.Type: GrantFiled: September 21, 1992Date of Patent: January 10, 1995Assignee: Hitachi, Ltd.Inventors: Akio Honji, Toshio Ogawa, Osamu Kuroda, Hisao Yamashita, Takahiro Tachi, Hiroshi Miyadera, Masakatsu Fujishita
-
Patent number: 5377324Abstract: The present invention comprises a plurality of processor modules and shared storage modules connected through a system bus. It improves system performance by limiting the range and shortening the time of exclusive control when a CSI (compare and store interlocked) instruction is executed to rewrite the contents of a shared storage if read data at an accaccaccess address of a shared storage coincide with the data anticipated by a CPU. In the present invention, when the CPU of the processor module rewrites data by addressing any shared storage module in executing a CSI instruction, the CPU has a connection unit connected through a system bus of a shared storage module recognize the CSI instruction, and reads data and compares them with comparison data in the shared storage module. Thus, the range of the exclusive control is limited to the process in the internal bus in the shared storage module.Type: GrantFiled: May 18, 1992Date of Patent: December 27, 1994Assignee: Fujitsu LimitedInventors: Akira Kabemoto, Toshio Ogawa, Masashi Shirotani
-
Patent number: 5331187Abstract: A ferroelectric thin film element constructed by forming a first electrode composed of an alloy thin film of a Ni-Cr-Al system or Ni-Al system on a substrate and forming a ferroelectric thin film composed of a ferroelectric material having a composition having a spontaneous axis in the direction (111) and having a crystal orientation in the direction (111) on the first electrode composed of a thin film.Type: GrantFiled: February 22, 1993Date of Patent: July 19, 1994Assignee: Myrata Mfg. Co., Ltd.Inventor: Toshio Ogawa
-
Patent number: 5318034Abstract: This invention provides a delay circuit capable of electrically varying the delay amount comprising a first transistor for receiving a signal to be delayed from the base connected to an input terminal and outputting a positive phase signal and a negative phase signal with respect to the signal from the input terminal, respectively from the emitter and the collector thereof; two variable capacity diodes with their terminals of the same polarity connected together and a specified control voltage applied to the point of said connection, one end of the connected diodes being connected to the emitter of said first transistor; a second transistor with the base grounded, the emitter connected to the collector of the above-mentioned first transistor, and the collector connected to one end of a specified resistance; and a delayed signal output terminal having connected thereto the other end of the two variable capacity diodes and the other end of the specified resistance.Type: GrantFiled: November 27, 1992Date of Patent: June 7, 1994Assignee: Hitachi Medical Corp.Inventors: Kazunari Ishida, Kazutaka Okada, Toshio Kondo, Toshio Ogawa, Norio Yokozawa, Takashi Ichikawa
-
Patent number: 5271276Abstract: A frequency transfer type phase adjustment apparatus for frequency-transferring a plurality of reception signals derived from arrayed ultrasonic transducer elements into low frequency components by mixing these reception signals with a reference signal, and for applying delays to these low frequency components so as to be summed with each other, comprises small delay circuits for applying very short delays to the respective reception signals before being frequency-transferred; and a quantizing delay circuit for applying delays obtained by multiplying a delay time unit by an integer, to the respective reception signals after being frequency-transferred. A ratio of the delay time unit to one-cycle period of the reference signal is equal to an integer ratio. Phase shifters are inserted into either the output sides or the input sides of the mixers for the respective signal channels used for the frequency transfer operation.Type: GrantFiled: November 25, 1991Date of Patent: December 21, 1993Assignees: Hitachi, Ltd., Hitachi Medical CorporationInventors: Kageyoshi Katakura, Toshio Ogawa, Shin-ichi Kondo