Patents by Inventor Yutaka Takaku
Yutaka Takaku 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: 10774867Abstract: A bolt includes a body and a detecting portion. The body includes a shank and a head provided at one end of the shank. The detecting portion is configured to detect a strain in accordance with an axial force of the shank. The detecting portion includes a memory, a measuring portion, and a transmitting portion. The measuring portion is configured to operate by receiving a first wireless power feed, convert the strain into measurement data, and write the measurement data to the memory. The transmitting portion is configured to operate by receiving a second wireless power feed after the first wireless power feed, read the measurement data stored in the memory, and transmit the read measurement data.Type: GrantFiled: November 20, 2017Date of Patent: September 15, 2020Assignee: SANNOHASHI CORPORATIONInventors: Fumitaka Saigo, Yutaka Takaku, Tomohiro Yamato, Ryo Sakazume
-
Publication number: 20180073542Abstract: A bolt includes a body and a detecting portion. The body includes a shank and a head provided at one end of the shank. The detecting portion is configured to detect a strain in accordance with an axial force of the shank. The detecting portion includes a memory, a measuring portion, and a transmitting portion. The measuring portion is configured to operate by receiving a first wireless power feed, convert the strain into measurement data, and write the measurement data to the memory. The transmitting portion is configured to operate by receiving a second wireless power feed after the first wireless power feed, read the measurement data stored in the memory, and transmit the read measurement data.Type: ApplicationFiled: November 20, 2017Publication date: March 15, 2018Inventors: Fumitaka SAIGO, Yutaka TAKAKU, Tomohiro YAMATO, Ryo SAKAZUME
-
Patent number: 8065049Abstract: A vehicle includes an internal combustion engine 1 and a rotating electric machine 5 as drive power sources and drives a wheel using a driving force of the internal combustion engine 1 and/or the rotating electric machine 5. A diagnostic control unit 700 diagnoses the vehicle while controlling the same. The diagnostic control unit 700 shifts an operating point of the internal combustion engine 1 to a plurality of diagnostic operating points to diagnose a catalyst or an oxygen sensor. Meantime, the diagnostic control unit 700 compensates for an excess or a deficiency in the driving force of the internal combustion engine 1 accompanied by the shift of the operating point by letting the rotating electric machine 5 perform a power running or regeneration operation.Type: GrantFiled: December 5, 2008Date of Patent: November 22, 2011Assignee: Hitachi, Ltd.Inventors: Hiroyuki Sakamoto, Yutaka Takaku
-
Patent number: 7976427Abstract: This invention provides a vehicle control apparatus constructed so that during the control of a downshift for deceleration, braking shocks can be reduced and the amount of energy regenerated can be increased, and a hybrid vehicle equipped with the control apparatus. The hybrid vehicle 1 includes wheels 14, an engine 12, a motor 11, a multi-stage transmission 20 that reduces motor torque and transmits the reduced torque to the wheels, and a brake 15 that brakes the wheels. During deceleration downshift control, a hybrid control module 100 provides distribution control of the regenerative torque of the motor 11 and the braking torque of the brake 15 so that the total braking force of the vehicle during gear shifting matches a target value.Type: GrantFiled: December 4, 2008Date of Patent: July 12, 2011Assignee: Hitachi, Ltd.Inventors: Daisuke Yamamoto, Yutaka Takaku
-
Patent number: 7956560Abstract: A control apparatus for controlling a rotational electric machine and a driving apparatus for a vehicle that includes an AC motor that rotates wheels and is driven by a power supplied from a battery, an instant variation detecting unit provided in a motor controller that detects a instantaneous variation of a current or voltage of the battery, and a current command operating unit that changes a current command signal for current to be sent to the AC motor, such that an internal loss of the AC motor is increased, by using an internal-loss-increase-use Id·Iq table.Type: GrantFiled: June 12, 2008Date of Patent: June 7, 2011Assignee: Hitachi, Ltd.Inventors: Shiho Izumi, Satoru Kaneko, Hideki Miyazaki, Yutaka Takaku
-
Publication number: 20090248230Abstract: The present invention provides a motor controller capable of selecting a motor drive system that provides the best possible system efficiency, according to monitored parameters indicative of the vehicle condition and the conditions of the mounted components. A drive signal processing block of the motor controller outputs drive signals to the motor by using a first drive system and a second drive system causing less switching loss than the first drive system, depending on a demanded torque for the motor. A drive system determination block, when an operating point of the motor allows selection between the first drive system and the second drive system, performs switching from the first drive system to the second drive system, based on the condition of an electric component of the vehicle or the vehicle running condition.Type: ApplicationFiled: February 13, 2009Publication date: October 1, 2009Applicant: Hitachi, Ltd.Inventors: Shiho Izumi, Satoru Kaneko, Yutaka Takaku
-
Publication number: 20090150019Abstract: A vehicle includes an internal combustion engine 1 and a rotating electric machine 5 as drive power sources and drives a wheel using a driving force of the internal combustion engine 1 and/or the rotating electric machine 5. A diagnostic control unit 700 diagnoses the vehicle while controlling the same. The diagnostic control unit 700 shifts an operating point of the internal combustion engine 1 to a plurality of diagnostic operating points to diagnose a catalyst or an oxygen sensor. Meantime, the diagnostic control unit 700 compensates for an excess or a deficiency in the driving force of the internal combustion engine 1 accompanied by the shift of the operating point by letting the rotating electric machine 5 perform a power running or regeneration operation.Type: ApplicationFiled: December 5, 2008Publication date: June 11, 2009Applicant: HITACHI, LTD.Inventors: Hiroyuki SAKAMOTO, Yutaka TAKAKU
-
Publication number: 20090149295Abstract: This invention provides a vehicle control apparatus constructed so that during the control of a downshift for deceleration, braking shocks can be reduced and the amount of energy regenerated can be increased, and a hybrid vehicle equipped with the control apparatus. The hybrid vehicle 1 includes wheels 14, an engine 12, a motor 11, a multi-stage transmission 20 that reduces motor torque and transmits the reduced torque to the wheels, and a brake 15 that brakes the wheels. During deceleration downshift control, a hybrid control module 100 provides distribution control of the regenerative torque of the motor 11 and the braking torque of the brake 15 so that the total braking force of the vehicle during gear shifting matches a target value.Type: ApplicationFiled: December 4, 2008Publication date: June 11, 2009Applicant: Hitachi,Ltd.Inventors: Daisuke Yamamoto, Yutaka Takaku
-
Publication number: 20080309264Abstract: A control apparatus for controlling a rotational electric machine and a driving apparatus for a vehicle that include an AC motor that rotates wheels and is driven by a power supplied from a battery, an instant variation detecting unit provided in a motor controller that detects a instant variation of a current or voltage of the battery, and a current command operating unit that changes a current command to be sent to the AC motor such that an internal loss of the AC motor is increased by using an internal-loss-increase-use Id·Iq table.Type: ApplicationFiled: June 12, 2008Publication date: December 18, 2008Applicant: Hitachi, Ltd.Inventors: Shiho IZUMI, Satoru KANEKO, Hideki MIYAZAKI, Yutaka TAKAKU
-
Patent number: 7409275Abstract: The present invention provides a vehicle diagnostic system comprising an electronic control unit for controlling and monitoring vehicle equipment, a radio communication means for transmitting a vehicle diagnostic information to a telecommunication equipment located outside the vehicle or for communicating between the vehicle and the telecommunication equipment located outside the vehicle and for transmitting a communication diagnostic signal to the electronic control unit and receiving a response signal to the communication diagnostic signal, and a communication line for connecting the electronic control unit and the radio communication means wherein the response signal is utilized to determine if the communication line is properly functional.Type: GrantFiled: January 29, 2007Date of Patent: August 5, 2008Assignee: Hitachi, Ltd.Inventors: Kohei Sakurai, Nobuyasu Kanekawa, Minoru Ohsuga, Masatoshi Hoshino, Yoichi Iihoshi, Yutaka Takaku
-
Patent number: 7389637Abstract: A diagnostic equipment for an exhaust gas cleaning apparatus installed for an engine, comprising a misfire detector which detects the misfire of the engine, and a secondary-air-system failure detector which detects the failure of a secondary air system. An index corrector corrects a deterioration index calculated by a deterioration-index calculator, in accordance with the detected result of the detector. A deterioration decision unit decides if the diagnostic equipment has failed, by the use of the corrected deterioration index. In a case where the extent of the misfire or the like is severe, a decision interrupter interrupts the decision of the deterioration decision unit. Thus, even when the misfire of the engine or the failure of the secondary air system has occurred, the detection of the deterioration of a catalyst does not err. It is therefore avoided to erroneously replace the catalyst which has not deteriorated yet, or to run the engine in spite of the deterioration of the catalyst.Type: GrantFiled: October 5, 2006Date of Patent: June 24, 2008Assignee: Hitachi, Ltd.Inventors: Yutaka Takaku, Toshio Ishii
-
Publication number: 20070124039Abstract: The present invention provides a vehicle diagnostic system comprising an electronic control unit for controlling and monitoring vehicle equipment, a radio communication means for transmitting a vehicle diagnostic information to a telecommunication equipment located outside the vehicle or for communicating between the vehicle and the telecommunication equipment located outside the vehicle and for transmitting a communication diagnostic signal to the electronic control unit and receiving a response signal to the communication diagnostic signal, and a communication line for connecting the electronic control unit and the radio communication means wherein the response signal is utilized to determine if the communication line is properly functional.Type: ApplicationFiled: January 29, 2007Publication date: May 31, 2007Inventors: Kohei Sakurai, Nobuyasu Kanekawa, Minoru Ohsuga, Masatoshi Hoshino, Yoichi Iihoshi, Yutaka Takaku
-
Publication number: 20070028596Abstract: A diagnostic equipment for an exhaust gas cleaning apparatus installed for an engine, comprising a misfire detector which detects the misfire of the engine, and a secondary-air-system failure detector which detects the failure of a secondary air system. An index corrector corrects a deterioration index calculated by a deterioration-index calculator, in accordance with the detected result of the detector. A deterioration decision unit decides if the diagnostic equipment has failed, by the use of the corrected deterioration index. In a case where the extent of the misfire or the like is severe, a decision interrupter interrupts the decision of the deterioration decision unit. Thus, even when the misfire of the engine or the failure of the secondary air system has occurred, the detection of the deterioration of a catalyst does not err. It is therefore avoided to erroneously replace the catalyst which has not deteriorated yet, or to run the engine in spite of the deterioration of the catalyst.Type: ApplicationFiled: October 5, 2006Publication date: February 8, 2007Applicant: Hitachi, Ltd.Inventors: Yutaka Takaku, Toshio Ishii
-
Patent number: 7117664Abstract: A diagnostic equipment for an exhaust gas cleaning apparatus installed for an engine, comprising a misfire detector which detects the misfire of the engine, and a secondary-air-system failure detector which detects the failure of a secondary air system. An index corrector corrects a deterioration index calculated by a deterioration-index calculator, in accordance with the detected result of the detector. A deterioration decision unit decides if the diagnostic equipment has failed, by the use of the corrected deterioration index. In a case where the extent of the misfire or the like is severe, a decision interrupter interrupts the decision of the deterioration decision unit. Thus, even when the misfire of the engine or the failure of the secondary air system has occurred, the detection of the deterioration of a catalyst does not err. It is therefore avoided to erroneously replace the catalyst which has not deteriorated yet, or to run the engine in spite of the deterioration of the catalyst.Type: GrantFiled: August 23, 2004Date of Patent: October 10, 2006Assignee: Hitachi, Ltd.Inventors: Yutaka Takaku, Toshio Ishii
-
Publication number: 20060089768Abstract: The present invention provides a vehicle diagnostic system comprising an electronic control unit for controlling and monitoring vehicle equipment, a radio communication means for transmitting a vehicle diagnostic information to a telecommunication equipment located outside the vehicle or for communicating between the vehicle and the telecommunication equipment located outside the vehicle and for transmitting a communication diagnostic signal to the electronic control unit and receiving a response signal to the communication diagnostic signal, and a communication line for connecting the electronic control unit and the radio communication means wherein the response signal is utilized to determine if the communication line is properly functional.Type: ApplicationFiled: October 19, 2005Publication date: April 27, 2006Inventors: Kohei Sakurai, Nobuyasu Kanekawa, Minoru Ohsuga, Masatoshi Hoshino, Yoichi Iihoshi, Yutaka Takaku
-
Patent number: 6907341Abstract: A misfire detector is provided that is accurate even in the case of a disturbance due to causes such as driving on a rough road. The misfire detector is equipped with a crankshaft revolution detector to measure the time period required for the crankshaft of an internal-combustion engine to revolve for a given angle. A signal-processor is also provided for detecting the misfiring of the internal-combustion engine by processing the time period. In one embodiment, the misfire detector has two filters having the same sensitivity to the misfire frequency, and differing in the sensitivity to frequencies adjacent to said misfire frequency. It can be determined that a misfire has occurred if the ratio or difference between the outputs of the two filters stays within a fixed range and one or both of the filters have respective outputs exceeding a threshold value.Type: GrantFiled: October 2, 2003Date of Patent: June 14, 2005Assignee: Hitachi, Ltd.Inventors: Toshihiro Aono, Eisaku Fukuchi, Toshio Hori, Yutaka Takaku
-
Patent number: 6883307Abstract: In an internal combustion engine diagnosis apparatus comprising a cleanup catalyst arranged on an exhaust pipe of an internal combustion engine and an HC adsorption catalyst arranged downstream of and in parallel to the cleanup catalyst, degradation and failure of the HC adsorption catalyst is accurately diagnosed. The internal combustion engine diagnosis apparatus comprising the cleanup catalyst arranged in the exhaust pipe of the internal combustion engine; and the HC adsorption catalyst arranged in parallel to and downstream of the cleanup catalyst, during high temperature period the HC adsorption catalyst desorbing and cleaning up HC desorbed during low temperature period, wherein degradation of the HC adsorption catalyst is diagnosed based on a gradient of temperature of the HC adsorption catalyst during a period when temperature of the HC adsorption catalyst is within a range of 50° C. to 250° C.Type: GrantFiled: February 27, 2002Date of Patent: April 26, 2005Assignee: Hitachi, Ltd.Inventors: Yoichi Iihoshi, Minoru Ohsuga, Yutaka Takaku
-
Publication number: 20050016160Abstract: A diagnostic equipment for an exhaust gas cleaning apparatus installed for an engine, comprising a misfire detector which detects the misfire of the engine, and a secondary-air-system failure detector which detects the failure of a secondary air system. An index corrector corrects a deterioration index calculated by a deterioration-index calculator, in accordance with the detected result of the detector. A deterioration decision unit decides if the diagnostic equipment has failed, by the use of the corrected deterioration index. In a case where the extent of the misfire or the like is severe, a decision interrupter interrupts the decision of the deterioration decision unit. Thus, even when the misfire of the engine or the failure of the secondary air system has occurred, the detection of the deterioration of a catalyst does not err. It is therefore avoided to erroneously replace the catalyst which has not deteriorated yet, or to run the engine in spite of the deterioration of the catalyst.Type: ApplicationFiled: August 23, 2004Publication date: January 27, 2005Inventors: Yutaka Takaku, Toshio Ishii
-
Publication number: 20040267418Abstract: The present invention provides a vehicle diagnostic system comprising an electronic control unit for controlling and monitoring vehicle equipment, a radio communication means for transmitting a vehicle diagnostic information to a telecommunication equipment located outside the vehicle or for communicating between the vehicle and the telecommunication equipment located outside the vehicle and for transmitting a communication diagnostic signal to the electronic control unit and receiving a response signal to the communication diagnostic signal, and a communication line for connecting the electronic control unit and the radio communication means wherein the response signal is utilized to determine if the communication line is properly functional.Type: ApplicationFiled: July 29, 2004Publication date: December 30, 2004Inventors: Kohei Sakurai, Nobuyasu Kanekawa, Minoru Ohsuga, Masatoshi Hoshino, Yoichi Iihoshi, Yutaka Takaku
-
Patent number: 6807806Abstract: A diagnostic equipment for an exhaust gas cleaning apparatus installed for an engine, comprising a misfire detector which detects the misfire of the engine, and a secondary-air-system failure detector which detects the failure of a secondary air system. An index corrector corrects a deterioration index calculated by a deterioration-index calculator, in accordance with the detected result of the detector. A deterioration decision unit decides if the diagnostic equipment has failed, by the use of the corrected deterioration index. In a case where the extent of the misfire or the like is severe, a decision interrupter interrupts the decision of the deterioration decision unit. Thus, even when the misfire of the engine or the failure of the secondary air system has occurred, the detection of the deterioration of a catalyst does not err. It is therefore avoided to erroneously replace the catalyst which has not deteriorated yet, or to run the engine in spite of the deterioration of the catalyst.Type: GrantFiled: May 10, 2002Date of Patent: October 26, 2004Assignee: Hitachi, Ltd.Inventors: Yutaka Takaku, Toshio Ihshii