Patents by Inventor Nobuhiro Akasaka
Nobuhiro Akasaka 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).
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Patent number: 11505174Abstract: The present invention realizes a vehicle control device that, even when power characteristics of a power generation device and a power transmission device changes, senses degradation of vehicle components, corrects a drive instruction to the power transmission device, and is thereby capable of stabilizing vehicle behavior over a long term. The present invention, in a predetermined vehicle environment state, measures fluctuation in drive power and acceleration in a transient region by using vehicle behavior sensors 4, performs comparison with a reference fluctuation, and thereby senses degradation of vehicle components. The drive instruction to the transmission 16-side is corrected in accordance with the degradation of vehicle components that is sensed.Type: GrantFiled: July 26, 2017Date of Patent: November 22, 2022Assignee: Hitachi Astemo, Ltd.Inventors: Satoru Okubo, Nobuhiro Akasaka, Satoshi Matsuda, Yusuke Kogure
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Patent number: 10720055Abstract: The present invention provides a parking assist apparatus capable of improving convenience when a passenger of a vehicle gets on and off. According to the present invention, the parking assistance apparatus acquires information on parking candidate frames, and where an own vehicle can park, from a front camera, a right camera, a rear camera, and a left camera configured to acquire information on a surrounding environment of the own vehicle, and from surrounding environment information acquired by these cameras. The parking assistance apparatus detects surrounding environment information and of the parking candidate frames, and from the surrounding environment information and information on the parking candidate frames, and determines a target parking position where the own vehicle parks based on the information on the parking candidate frames, the surrounding environment information, and the preference information related to getting on and off of a passenger who rides on the own vehicle.Type: GrantFiled: July 20, 2017Date of Patent: July 21, 2020Assignee: Hitachi Automotive Systems, Ltd.Inventors: Satoshi Matsuda, Nobuhiro Akasaka, Satoru Okubo, Yusuke Kogure
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Publication number: 20190176797Abstract: The present invention realizes a vehicle control device that, even when power characteristics of a power generation device and a power transmission device changes, senses degradation of vehicle components, corrects a drive instruction to the power transmission device, and is thereby capable of stabilizing vehicle behavior over a long term. The present invention, in a predetermined vehicle environment state, measures fluctuation in drive power and acceleration in a transient region by using vehicle behavior sensors 4, performs comparison with a reference fluctuation, and thereby senses degradation of vehicle components. The drive instruction to the transmission 16-side is corrected in accordance with the degradation of vehicle components that is sensed.Type: ApplicationFiled: July 26, 2017Publication date: June 13, 2019Inventors: Satoru OKUBO, Nobuhiro AKASAKA, Satoshi MATSUDA, Yusuke KOGURE
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Publication number: 20190180621Abstract: The present invention provides a parking assist apparatus capable of improving convenience when a passenger of a vehicle gets on and off. According to the present invention, the parking assistance apparatus acquires information on parking candidate frames, and where an own vehicle can park, from a front camera, a right camera, a rear camera, and a left camera configured to acquire information on a surrounding environment of the own vehicle, and from surrounding environment information acquired by these cameras. The parking assistance apparatus detects surrounding environment information and of the parking candidate frames, and from the surrounding environment information and information on the parking candidate frames, and determines a target parking position where the own vehicle parks based on the information on the parking candidate frames, the surrounding environment information, and the preference information related to getting on and off of a passenger who rides on the own vehicle.Type: ApplicationFiled: July 20, 2017Publication date: June 13, 2019Inventors: Satoshi MATSUDA, Nobuhiro AKASAKA, Satoru OKUBO, Yusuke KOGURE
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Patent number: 9950627Abstract: An object is to reduce a discharging time required for discharging residual charges of a capacitor.Type: GrantFiled: October 14, 2014Date of Patent: April 24, 2018Assignee: Hitachi Automotive Systems, Ltd.Inventors: Sho Yaegaki, Hiroshi Tamura, Takeshi Matsuo, Hiroyuki Yamada, Nobuhiro Akasaka
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Patent number: 9906164Abstract: A surge according to a change of a switching state can be reduced without increasing a torque ripple of a motor. A first switching signal to control switching of a boost converter is generated on the basis of a comparison of a first duty command value and a first triangular wave carrier of the boost converter. A second switching signal to control switching of an inverter is generated on the basis of a comparison of a second duty command value and a second triangular wave carrier of the inverter. In addition, the second triangular wave carrier is generated such that a frequency of the second triangular wave carrier becomes equal to a frequency of the first triangular wave carrier and a phase of the second triangular wave carrier is different from a phase of the first triangular wave carrier by 180 degrees.Type: GrantFiled: December 8, 2014Date of Patent: February 27, 2018Assignee: Hitachi Automotive Systems, Ltd.Inventors: Hiroshi Tamura, Takeshi Matsuo, Hiroyuki Yamada, Nobuhiro Akasaka, Sho Yaegaki
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Publication number: 20170005591Abstract: A surge according to a change of a switching state can be reduced without increasing a torque ripple of a motor. A first switching signal to control switching of a boost converter is generated on the basis of a comparison of a first duty command value and a first triangular wave carrier of the boost converter. A second switching signal to control switching of an inverter is generated on the basis of a comparison of a second duty command value and a second triangular wave carrier of the inverter. In addition, the second triangular wave carrier is generated such that a frequency of the second triangular wave carrier becomes equal to a frequency of the first triangular wave carrier and a phase of the second triangular wave carrier is different from a phase of the first triangular wave carrier by 180 degrees.Type: ApplicationFiled: December 8, 2014Publication date: January 5, 2017Applicant: Hitachi Automotive Systems, Ltd.Inventors: Hiroshi TAMURA, Takeshi MATSUO, Hiroyuki YAMADA, Nobuhiro AKASAKA, Sho YAEGAKI
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Publication number: 20160280076Abstract: An object is to reduce a discharging time required for discharging residual charges of a capacitor.Type: ApplicationFiled: October 14, 2014Publication date: September 29, 2016Inventors: Sho YAEGAKI, Hiroshi TAMURA, Takeshi MATSUO, Hiroyuki YAMADA, Nobuhiro AKASAKA
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Patent number: 7532973Abstract: A direct injection internal combustion engine control apparatus used in an idling stop vehicle or the like, which can reduce residual fuel generated in a combustion chamber in an engine stop time, and prevent deterioration of exhaust performance and deterioration of exhaust gas performance (A/F control precision) at the time of engine restart. The control apparatus includes a device for automatically stopping an internal combustion engine upon satisfaction of a predetermined automatic stop condition, and at least one of a fuel injection control unit which corrects fuel injection and an air-flow amount control unit which corrects an air-flow amount. Upon satisfaction of the predetermined automatic stop condition, at least one of fuel injection correcting control by the fuel injection control unit and air-flow amount correcting control by the air-flow amount control unit is performed.Type: GrantFiled: April 17, 2007Date of Patent: May 12, 2009Assignee: Hitachi, Ltd.Inventor: Nobuhiro Akasaka
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Publication number: 20070181088Abstract: The present invention provides a control apparatus of a direct injection internal combustion engine used in an idling stop vehicle or the like, which can reduce residual fuel generated in a combustion chamber in an engine stop time, and prevent deterioration of exhaust performance and deterioration of exhaust gas performance (A/F control precision) at the time of engine restart. The control apparatus includes an automatic stop control device for automatically stopping an internal combustion engine upon satisfaction of a predetermined automatic stop condition, and at least one of a fuel injection control unit which corrects fuel injection and an air-flow amount control unit which corrects an air-flow amount. Upon satisfaction of the predetermined automatic stop condition, at least one of fuel injection correcting control by the fuel injection control unit and air-flow amount correcting control by the air-flow amount control unit is performed.Type: ApplicationFiled: April 17, 2007Publication date: August 9, 2007Applicant: HITACHI LTD.Inventor: Nobuhiro AKASAKA
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Patent number: 7212910Abstract: The present invention provides a control apparatus of a direct injection internal combustion engine used in an idling stop vehicle or the like, which can reduce residual fuel generated in a combustion chamber in an engine stop time, and prevent deterioration of exhaust performance and deterioration of exhaust gas performance (A/F control precision) at the time of engine restart. The control apparatus includes an automatic stop control device for automatically stopping an internal combustion engine upon satisfaction of a predetermined automatic stop condition, and at least one of a fuel injection control unit which corrects fuel injection and an air-flow amount control unit which corrects an air-flow amount. Upon satisfaction of the predetermined automatic stop condition, at least one of fuel injection correcting control by the fuel injection control unit and air-flow amount correcting control by the air-flow amount control unit is performed.Type: GrantFiled: February 16, 2006Date of Patent: May 1, 2007Assignee: Hitachi, Ltd.Inventor: Nobuhiro Akasaka
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Publication number: 20060212212Abstract: The present invention provides a control apparatus of a direct injection internal combustion engine used in an idling stop vehicle or the like, which can reduce residual fuel generated in a combustion chamber in an engine stop time, and prevent deterioration of exhaust performance and deterioration of exhaust gas performance (A/F control precision) at the time of engine restart. The control apparatus includes an automatic stop control device for automatically stopping an internal combustion engine upon satisfaction of a predetermined automatic stop condition, and at least one of a fuel injection control unit which corrects fuel injection and an air-flow amount control unit which corrects an air-flow amount. Upon satisfaction of the predetermined automatic stop condition, at least one of fuel injection correcting control by the fuel injection control unit and air-flow amount correcting control by the air-flow amount control unit is performed.Type: ApplicationFiled: February 16, 2006Publication date: September 21, 2006Applicant: Hitachi, Ltd.Inventor: Nobuhiro Akasaka
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Patent number: 7064276Abstract: A communication cable having a communication wire and an armor including at least two synthetic resin layers, and protects the communication wire in a loose state. The communication wire protecting tube includes at least two synthetic resin layers, and inserts the communication wire in a loose state. The most hard resin layer of the armor has a crosswise or spiral annular groove or cut portion continuous in the longitudinal direction to reach the radially inner face, and the outermost layer of the armor is formed of a protective layer made of a softer resin than the hard resin layer. The adjoining edge portions of the annular groove or the cut portion come, when the communication wire is to be bent, into contact with each other so that it may be prevented from being bent to a predetermined or smaller bend radius.Type: GrantFiled: December 18, 2003Date of Patent: June 20, 2006Assignee: Sumitomo Electric Industries, Ltd.Inventors: Itaru Sakabe, Hisashi Tanji, Toshiaki Kakii, Hiroki Ishikawa, Kazuaki Hamada, Nobuhiro Akasaka
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Publication number: 20050098342Abstract: [Problems to be solved]A communication cable and a communication wire protecting tube, which can be easily bent to a predetermined bend radius by a low force but which requires such a higher force for the bend of a smaller diameter that it may be hard to bend. [Means for solving the Problems]The communication cable 10,10A comprises a communication wire 11,11A and an armor 13A including at least two synthetic resin layers, and protects the communication wire 11,11A in a loose state. The communication wire protecting tube comprises at least two synthetic resin layers, and inserts the communication wire 11,11A in a loose state. The most hard resin layer 13a, 13aA of the armor 13,13A has a crosswise or spiral annular groove 14 or cut portion 14A continuous in the longitudinal direction to reach the radially inner face, and the outermost layer of the armor 13,13A is formed of a protective layer 13b,13bA made of a softer resin than the hard resin layer 13a, 13aA.Type: ApplicationFiled: December 18, 2003Publication date: May 12, 2005Inventors: Itaru Sakabe, Hisashi Tanji, Toshiaki Kakii, Hiroki Ishikawa, Kazuaki Hamada, Nobuhiro Akasaka
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Patent number: 6841729Abstract: A self-supporting cable includes a main cable constructed by covering a cable core with an inner cover layer and installing one or more strength members inside the inner cover layer such that they lie on a plane passing through the central axis thereof; a support member; and an outer cover layer formed so as to cover the main cable and the support member while they are arranged in parallel. A support member portion including the support member and a part of the outer cover layer and a main cable portion including the main cable and a part of the outer cover layer are connected by connecting portions, which are also a part of the outer cover layer, in the longitudinal direction thereof. The main cable portion is made longer than the support member portion so that there is an allowance in the length thereof.Type: GrantFiled: October 9, 2001Date of Patent: January 11, 2005Assignee: Sumitomo Electric Industries, Ltd.Inventors: Itaru Sakabe, Hiroki Ishikawa, Nobuhiro Akasaka, Takeo Tsurumi, Yoshiro Yamane
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Patent number: 6690872Abstract: A silica based optical waveguide is described, comprising a substrate, a core waveguide formed thereon, and an over cladding part comprising a silica based glass with a refractive index lowering dopant and a refractive index increasing dopant added, formed on the substrate so as to cover the core waveguide, wherein a segregation layer with a higher concentration of the refractive index increasing dopant is formed in a part of the over cladding part in contact with the substrate and the core waveguide such that at least a part of the refractive index increase in the segregation layer provided by the refractive index increasing dopant with respect to the part of the over cladding part other than the segregation layer is offset by decline of the refractive index by increasing the amount of the refractive index lowering dopant added in the segregation layer and/or adding another refractive index lowering dopant.Type: GrantFiled: January 10, 2001Date of Patent: February 10, 2004Assignee: Sumitomo Electric Industries, Ltd.Inventors: Takashi Sasaki, Shigeru Hirai, Nobuhiro Akasaka, Shigeru Tanaka, Chisai Hirose
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Patent number: 6654527Abstract: An optical fiber cable having excellent workability and long-term reliability. The cable comprises at least one optical fiber, a plastic jacket covering the optical fiber or optical fibers, and at least one anti-shrink member embedded in the jacket. The jacket has a longitudinal shrinkage of at most 0.5% when heated at 110° C. for two hours. The cable has a remaining bend with a radius of curvature of at least 100 mm when wound on a 50-mm-radious mandrel and heated at 85° C. for two hours. The deflection of a 30-cm-long cantilever made of the cable is at least 50 mm. In one aspect of the cable, the cable is specified by the conditions of ESt/ESj≧0.7, EIt/EIc≧0.1, and EIc/Mc≦8×106 mm3 (E: Young's modulus; S: cross-sectional area; t: total of anti-shrink members; j: jacket; I: geometrical moment of inertia; c: cable; and M: mass).Type: GrantFiled: October 15, 2002Date of Patent: November 25, 2003Assignee: Sumitomo Electric Industries, Ltd.Inventors: Itaru Sakabe, Nobuhiro Akasaka, Masayoshi Yamano
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Publication number: 20030201117Abstract: A self-supporting cable includes a main cable constructed by covering a cable core with an inner cover layer and installing one or more strength members inside the inner cover layer such that they lie on a plane passing through the central axis thereof; a support member; and an outer cover layer formed so as to cover the main cable and the support member while they are arranged in parallel. A support member portion including the support member and a part of the outer cover layer and a main cable portion including the main cable and a part of the outer cover layer are connected by connecting portions, which are also a part of the outer cover layer, in the longitudinal direction thereof. The main cable portion is made longer than the support member portion so that there is an allowance in the length thereof.Type: ApplicationFiled: April 1, 2003Publication date: October 30, 2003Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Itaru Sakabe, Hiroki Ishikawa, Nobuhiro Akasaka, Takeo Tsurumi, Yoshiro Yamane
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Publication number: 20030081918Abstract: An optical fiber cable having excellent workability and long-term reliability. The cable comprises at least one optical fiber, a plastic jacket covering the optical fiber or optical fibers, and at least one anti-shrink member embedded in the jacket. The jacket has a longitudinal shrinkage of at most 0.5% when heated at 110° C. for two hours. The cable has a remaining bend with a radius of curvature of at least 100 mm when wound on a 50-mm-radious mandrel and heated at 85° C. for two hours. The deflection of a 30-cm-long cantilever made of the cable is at least 50 mm. In one aspect of the cable, the cable is specified by the conditions of ESt/ESj≧0.7, EIt/EIc≧0.1, and EIc/Mc≦8×106 mm3 (E: Young's modulus; S: cross-sectional area; t: total of anti-shrink members; j: jacket; I: geometrical moment of inertia; c: cable; and M: mass).Type: ApplicationFiled: October 15, 2002Publication date: May 1, 2003Inventors: Itaru Sakabe, Nobuhiro Akasaka, Masayoshi Yamano
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Patent number: 6507680Abstract: A planar lightwave circuit (PLC) of a PLC module is provided with many waveguides including a plurality of input (output) optical waveguide on a substrate. Junction faces between these input (output) optical waveguide and input (output) optical fibers are slant against the optical axis thereof. The PLC module has photodetectors opposed to corresponding junction faces disposed at the input-optical-fiber's-side (output-optical-waveguide's-side).Type: GrantFiled: August 14, 2000Date of Patent: January 14, 2003Assignee: Sumitomo Electric Industries, Ltd.Inventors: Masayuki Nishimura, Hitoshi Hatayama, Nobuhiro Akasaka