Patents by Inventor Daisuke Shirai
Daisuke Shirai 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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Publication number: 20240098041Abstract: A transmission system includes a calculation unit 251 that calculates a jitter pattern sequence of a plurality of packets transmitted by a transmission device 1 via a network using a transmission interval of the plurality of packets and a difference between arrival times at which the packets arrive at a reception device 2, a generation unit 252 that inputs the jitter pattern sequence to a first learning model 254 to generate a state index indicating a state of the network, and a buffer estimation unit 26 that determines a buffer size of a reception buffer 23 of the reception device 2 based on the state index.Type: ApplicationFiled: February 8, 2021Publication date: March 21, 2024Inventors: Takuro YAMAGUCHI, Takahiro YAMAGUCHI, Daisuke Shirai, Yasuhiro MOCHIDA
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Publication number: 20240039817Abstract: A video transmission system includes a video transmitter for storing a packet of video data in a transmitting buffer and transmitting the packet stored in the transmitting buffer, a video receiver for receiving the packet, and an estimation unit for estimating a characteristic of a transmission line between the video transmitter and the video receiver from an arrival time of each packet in the video receiver. The video transmitter transmits a packet at a timing specified from an inverse characteristic of a characteristic of the transmission line.Type: ApplicationFiled: December 11, 2020Publication date: February 1, 2024Inventors: Yasuhiro MOCHIDA, Takuro YAMAGUCHI, Daisuke Shirai, Takahiro YAMAGUCHI
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Publication number: 20230179894Abstract: An object of the present disclosure is to provide a data communication system, a computing apparatus, a data communication method, and a program, which are capable of highly reliable data transfer with low latency between computing apparatuses. The present disclosure achieves a highly reliable communication path by directly connecting computing apparatuses via an optical path and transmitting data through the optical path. Further, the present disclosure uses the optical path to achieve RDAM over wavelength transmission in which existing RDMA-enabled protocol stacks such as InfiniBand and TCP/IP/Ether are eliminated. The present disclosure eliminates the protocol stacks, enabling transfer with lower latency than in a case of “simply performing RDMA transmission over the wavelength path”.Type: ApplicationFiled: April 21, 2020Publication date: June 8, 2023Inventors: Yukio TSUKISHIMA, Toru MANO, Takahiro YAMAGUCHI, Yasuhiro MOCHIDA, Tomoya HIBI, Junki ICHIKAWA, Daisuke SHIRAI
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Patent number: 11458830Abstract: A powertrain system includes an internal combustion engine, a motor generator and a control device. The motor generator includes a rotating shaft connected to a crankshaft of the internal combustion engine via a torsional damper. The powertrain system is configured such that the crankshaft and the above-described rotating shaft are not connected to a drive shaft of a vehicle at least at the time of engine start. The control device is configured to execute a cranking torque amplification control that controls the motor generator such that the MG torque output from the motor generator for cranking the internal combustion engine fluctuates in a resonant period of the torsional damper while making a fluctuation center of the MG torque higher than zero.Type: GrantFiled: December 9, 2020Date of Patent: October 4, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki Iguma, Tomohito Ono, Hiroto Hashimoto, Daisuke Shirai
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Patent number: 11312360Abstract: If the destination has not been input, it is judged whether the present location is on the expressway (step S32). If the judgement result of the step S32 is positive, it is judged whether or not the actual SOC is less than or equal to the threshold TH2 (step S34). If the judgement result of the step S34 is positive, the restoring control is executed (step S36). Subsequent to the step S34 or S36, it is judged whether or not the vehicle is still on the expressway (step S38). If the judgement result of the step S38 is positive, it is judged whether or not the actual SOC is greater than or equal to the SOC_T2 (step S42). If the judgement result of the step S42 is positive, the maintaining control is executed (step S44).Type: GrantFiled: September 23, 2019Date of Patent: April 26, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto Hashimoto, Terufumi Miyazaki, Tomohito Ono, Yosuke Suzuki, Daisuke Shirai
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Patent number: 11303305Abstract: A selective PEG algorithm, creating a sparse matrix while maintaining row weight/column weight at arbitrary multi-levels, and in the process, inactivating an arbitrary edge so that a minimum loop formed between arbitrary nodes is enlarged or performing constrained interleaving, so that encoding efficiency in the case where a matrix space is narrow is improved.Type: GrantFiled: October 8, 2014Date of Patent: April 12, 2022Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yoshihide Tonomura, Daisuke Shirai, Tatsuya Fujii, Takayuki Nakachi, Takahiro Yamaguchi, Masahiko Kitamura
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Patent number: 11267451Abstract: If the destination has not been input, it is judged whether the present location is on the expressway (step S32). If the judgement result of the step S32 is positive, it is judged whether or not the actual SOC is less than or equal to the threshold TH2 (step S34). If the judgement result of the step S34 is positive, the restoring control is executed (step S36). Subsequent to the step S34 or S36, it is judged whether or not the vehicle is still on the expressway (step S38). If the judgement result of the step S38 is positive, it is judged whether or not the actual SOC is greater than or equal to the SOC_T2 (step S42). If the judgement result of the step S42 is positive, the maintaining control is executed (step S44).Type: GrantFiled: September 23, 2019Date of Patent: March 8, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto Hashimoto, Terufumi Miyazaki, Tomohito Ono, Yosuke Suzuki, Daisuke Shirai
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Publication number: 20210221215Abstract: A powertrain system includes an internal combustion engine, a motor generator and a control device. The motor generator includes a rotating shaft connected to a crankshaft of the internal combustion engine via a torsional damper. The powertrain system is configured such that the crankshaft and the above-described rotating shaft are not connected to a drive shaft of a vehicle at least at the time of engine start. The control device is configured to execute a cranking torque amplification control that controls the motor generator such that the MG torque output from the motor generator for cranking the internal combustion engine fluctuates in a resonant period of the torsional damper while making a fluctuation center of the MG torque higher than zero.Type: ApplicationFiled: December 9, 2020Publication date: July 22, 2021Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroki IGUMA, Tomohito ONO, Hiroto HASHIMOTO, Daisuke SHIRAI
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Publication number: 20200164855Abstract: If the destination has not been input, it is judged whether the present location is on the expressway (step S32). If the judgement result of the step S32 is positive, it is judged whether or not the actual SOC is less than or equal to the threshold TH2 (step S34). If the judgement result of the step S34 is positive, the restoring control is executed (step S36). Subsequent to the step S34 or S36, it is judged whether or not the vehicle has reached the scheduled exit (step S38). If the judgement result of the step S38 is positive, it is judged whether or not the actual SOC is greater than or equal to the SOC_T2 (step S42). If the judgement result of the step S42 is positive, the maintaining control is executed (step S44).Type: ApplicationFiled: September 23, 2019Publication date: May 28, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroto HASHIMOTO, Terufumi MIYAZAKI, Tomohito ONO, Yosuke SUZUKI, Daisuke SHIRAI
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Patent number: 10511331Abstract: This method and device makes it possible to implement maximum likelihood decoding of a sparse graph code at low computational complexity in the maximum likelihood decoding of the sparse graph code. This is, in the maximum likelihood of decoding of the sparse graph code, a lost data decoding process by a trivial decoding method and a lost data decoding process by a Gauss elimination method are performed repeatedly and alternately.Type: GrantFiled: August 8, 2014Date of Patent: December 17, 2019Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yoshihide Tonomura, Tatsuya Fujii, Takahiro Yamaguchi, Daisuke Shirai, Takayuki Nakachi
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Publication number: 20160248448Abstract: A selective PEG algorithm, creating a sparse matrix while maintaining row weight/column weight at arbitrary multi-levels, and in the process, inactivating an arbitrary edge so that a minimum loop formed between arbitrary nodes is enlarged or performing constrained interleaving, so that encoding efficiency in the case where a matrix space is narrow is improved.Type: ApplicationFiled: October 8, 2014Publication date: August 25, 2016Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yoshihide TONOMURA, Daisuke SHIRAI, Tatsuya FUJII, Takayuki NAKACHI, Takahiro YAMAGUCHI, Masahiko KITAMURA
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Publication number: 20160191080Abstract: This method and device makes it possible to implement maximum likelihood decoding of a sparse graph code at low computational complexity in the maximum likelihood decoding of the sparse graph code. This is, in the maximum likelihood of decoding of the sparse graph code, a lost data decoding process by a trivial decoding method and a lost data decoding process by a Gauss elimination method are performed repeatedly and alternately.Type: ApplicationFiled: August 8, 2014Publication date: June 30, 2016Inventors: Yoshihide TONOMURA, Tatsuya FUJII, Takahiro YAMAGUCHI, Daisuke SHIRAI, Takayuki Nakachi
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Patent number: 8181446Abstract: A reduction catalyst is disposed in an exhaust passage of an engine. A reducing agent added to the exhaust gas is urged to react with NOx in the exhaust gas, catalyzed by the reduction catalyst. A member for distributing the exhaust gas to which the reducing agent has been added is provided. This member is formed by applying of an axial welding and is disposed in the exhaust passage such that the internal surface of its joining portion is disposed to overhang from the topmost position of the joining portion.Type: GrantFiled: November 16, 2007Date of Patent: May 22, 2012Assignee: Nissan Diesel Motor Co., Ltd.Inventors: Koutarou Honda, Yuuji Naitou, Isamu Kanaya, Daisuke Shirai, Hitoshi Hiramoto, Naobumi Yamada
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Patent number: 7784273Abstract: An exhaust emission purifying apparatus has a NOx reduction catalytic converter in an exhaust passage of an engine, for purifying nitrogen oxides in the exhaust gas by reduction with urea aqueous solution; an injection nozzle injecting the urea solution toward an exhaust upstream side of the converter in the exhaust passage; and fins disposed on an exhaust upstream side of an injection position of the urea solution in the injection nozzle, for generating a spiral swirling flow of the gas swirling about a center corresponding to the central axis of an exhaust pipe. The swirling flow generated in the exhaust gas prior to the injection-supply of the urea aqueous solution promotes mixing of the solution with the gas to thereby promote the hydrolysis of the urea solution. And the exhaust gas and ammonia generated from the urea solution are uniformly mixed together.Type: GrantFiled: December 22, 2006Date of Patent: August 31, 2010Assignees: Nissan Diesel Motor Co., Ltd., Tokyo Roki Co., Ltd.Inventors: Isamu Kanaya, Koutarou Honda, Tomoko Amemiya, Kiminobu Hirata, Nobuhiko Masaki, Shinya Obana, Daisuke Shirai, Hitoshi Hiramoto, Naobumi Yamada
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Patent number: 7562521Abstract: The flow of exhaust gas flowing through the SCR muffler becomes good, thus improving the efficiency of purging nitrogen oxide (NOx) contained in exhaust gas. Further, vibrations that are caused by vibrations of the vehicle, exhaust gas, and the like, to which a reducing agent, etc., supplying nozzle is subject, are suppressed or reduced, thus improving the efficiency of an SCR catalyst purging nitrogen oxide (NOx) and the durability of the reducing agent, etc., supplying nozzle. The SCR muffler comprises an SCR catalyst 1 for selectively reducing and purging nitrogen oxide (NOx) contained in exhaust gas; an exhaust pipe 2 that allows the exhaust gas to flow into the SCR catalyst; and a reducing agent, etc., supplying means 3 that supplies a reducing agent or a reducing agent precursor to the exhaust gas. A plate 4 having air holes 5 which disperse and make a flow of the exhaust gas uniform is provided downstream of the reducing agent, etc., supplying means and upstream of the SCR catalyst.Type: GrantFiled: February 2, 2005Date of Patent: July 21, 2009Assignees: Tokyo Roki Co., Ltd., Nissan Diesel Motor Co., Ltd.Inventors: Daisuke Shirai, Naobumi Yamada, Hitoshi Hiramoto, Isamu Kanaya, Hiroki Ueno
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Patent number: 7430855Abstract: A muffling apparatus 1 of the present invention having an exhaust emission purifying function, including a turning portion 8 in an inside of an exhaust gas flow passage, and having an injection nozzle 12 disposed in an upstream side exhaust gas flow passage 9 of the turning portion 8, for injection-supplying a liquid reducing agent; and a reduction catalytic converter 13 disposed in a downstream side exhaust gas flow passage 10 of the turning portion 8, for reductively purifying nitrogen oxides with the liquid reducing agent. The apparatus further includes a diffusing member 15, which generates a vortex flow of a gas traveling in a vertical plane of the turning portion 8 to diffuse the liquid reducing agent.Type: GrantFiled: September 22, 2006Date of Patent: October 7, 2008Assignees: Nissan Diesel Motor Co., Ltd., Tokyo Roki Co., Ltd.Inventors: Tomoko Amemiya, Takefumi Mochizuki, Isamu Kanaya, Daisuke Shirai, Hitoshi Hiramoto
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Publication number: 20080072576Abstract: A reduction catalyst is disposed in an exhaust passage of an engine. A reducing agent added to the exhaust gas is urged to react with NOx in the exhaust gas, catalyzed by the reduction catalyst. A member for distributing the exhaust gas to which the reducing agent has been added is provided. This member is formed by applying of an axial welding and is disposed in the exhaust passage such that the internal surface of its joining portion is disposed to overhang from the topmost position of the joining portion.Type: ApplicationFiled: November 16, 2007Publication date: March 27, 2008Applicants: NISSAN DIESEL MOTOR CO., LTD., TOKYO ROKI CO., LTD.Inventors: Koutarou HONDA, Yuuji NAITOU, Isamu KANAYA, Daisuke SHIRAI, Hitoshi HIRAMOTO, Naobumi YAMADA
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Publication number: 20070175204Abstract: An SCR muffler retains the heat of a reducing agent, etc., supplying nozzle and an exhaust pipe, thereby preventing the reduction of the efficiency of an SCR catalyst purging nitrogen oxide (NOx) even at low temperatures and improving the durability of the reducing agent, etc., supplying nozzle. The SCRmuffler comprises an SCRcatalyst 1 for selectively reducing and purging nitrogen oxide (NOx) contained in exhaust gas; an exhaust pipe 2 that allows the exhaust gas to flow into the SCR catalyst; and a reducing agent, etc., supplying nozzle 3 that supplies a reducing agent or a reducing agent precursor to the exhaust gas. The reducing agent, etc., supplying nozzle 3 or the exhaust pipe 2 is of a heat-retaining double pipe structure.Type: ApplicationFiled: February 2, 2005Publication date: August 2, 2007Applicants: Tokyo Roki Co, Ltd, Nissan Diesel Motor Co.,LtdInventors: Daisuke Shirai, Hitoshi Hiramoto, Isamu Kanaya, Hiroki Ueno
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Publication number: 20070169467Abstract: The flow of exhaust gas flowing through the SCR muffler becomes good, thus improving the efficiency of purging nitrogen oxide (NOx) contained in exhaust gas. Further, vibrations that are caused by vibrations of the vehicle, exhaust gas, and the like, to which a reducing agent, etc., supplying nozzle is subject, are suppressed or reduced, thus improving the efficiency of an SCR catalyst purging nitrogen oxide (NOx) and the durability of the reducing agent, etc., supplying nozzle. The SCR muffler comprises an SCR catalyst 1 for selectively reducing and purging nitrogen oxide (NOx) contained in exhaust gas; an exhaust pipe 2 that allows the exhaust gas to flow into the SCR catalyst; and a reducing agent, etc., supplying means 3 that supplies a reducing agent or a reducing agent precursor to the exhaust gas. A plate 4 having air holes 5 which disperse and make a flow of the exhaust gas uniform is provided downstream of the reducing agent, etc., supplying means and upstream of the SCR catalyst.Type: ApplicationFiled: February 2, 2005Publication date: July 26, 2007Inventors: Daisuke Shirai, Naobumi Yamada, Hitoshi Hiramoto, Isamu Kanaya, Hiroki Ueno
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Publication number: 20070101703Abstract: An exhaust emission purifying apparatus has a NOx reduction catalytic converter in an exhaust passage of an engine, for purifying nitrogen oxides in the exhaust gas by reduction with urea aqueous solution; an injection nozzle injecting the urea solution toward an exhaust upstream side of the converter in the exhaust passage; and fins disposed on an exhaust upstream side of an injection position of the urea solution in the injection nozzle, for generating a spiral swirling flow of the gas swirling about a center corresponding to the central axis of an exhaust pipe. The swirling flow generated in the exhaust gas prior to the injection-supply of the urea aqueous solution promotes mixing of the solution with the gas to thereby promote the hydrolysis of the urea solution. And the exhaust gas and ammonia generated from the urea solution are uniformly mixed together.Type: ApplicationFiled: December 22, 2006Publication date: May 10, 2007Applicants: NISSAN DIESEL MOTOR CO., LTD., TOKYO ROKI CO., LTD.Inventors: Isamu Kanaya, Koutarou Honda, Tomoko Amemiya, Kiminobu Hirata, Nobuhiko Masaki, Shinya Obana, Daisuke Shirai, Hitoshi Hiramoto, Naobumi Yamada