Patents by Inventor Kenji Hijikata
Kenji Hijikata 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: 11946224Abstract: The object of the present invention resides in provision of a construction machine in which a hydraulic cylinder can be driven in a high efficiency by an accumulator. To this end, the construction machine including: a hydraulic cylinder; a first accumulator that accumulates return fluid from the hydraulic cylinder with a first set pressure; a tank that stores hydraulic fluid therein; a first hydraulic pump that delivers the hydraulic fluid sucked from the tank; a hydraulic actuator that is driven by the first hydraulic pump; and a second accumulator that accumulates return fluid from the hydraulic actuator with a second set pressure, includes a first control valve placed in a first hydraulic line that connects the first accumulator and the hydraulic cylinder to each other, and a second control valve placed in a second hydraulic line that connects the second accumulator and the hydraulic cylinder to each other. The second set pressure is set to a value higher than that of the first set pressure.Type: GrantFiled: April 7, 2021Date of Patent: April 2, 2024Assignee: Hitachi Construction Machinery Co., Ltd.Inventors: Seiji Hijikata, Yasutaka Tsuruga, Kenji Hiraku, Masatoshi Hoshino
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Patent number: 11542879Abstract: An EGR device for a vehicle includes a valve driver, a pressure comparison unit, a freeze determination unit, and an EGR controller. The valve driver drives an EGR valve to open, when fuel cut has been continued for a predetermined time in a state where an engine speed of a vehicle's engine is equal to or higher than a predetermined rotational speed. The pressure comparison unit compares a pre-driving pressure of an engine's intake pipe with a post-driving pressure of the intake pipe. The freeze determination unit sets a flag indicating that the EGR valve is frozen when a difference between the pre-driving pressure and the post-driving pressure is less than a predetermined value and an external temperature is less than a threshold. When the flag has been set, the EGR controller sets a control state of the EGR valve to a closed state and stops EGR control.Type: GrantFiled: September 22, 2021Date of Patent: January 3, 2023Assignee: SUBARU CORPORATIONInventors: Kenichi Yamamoto, Kenji Hijikata, Masafumi Hanazawa, Tomomichi Shiono, Daisuke Kugo, Noriyuki Matsuda
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Publication number: 20220090550Abstract: An EGR device for a vehicle includes a valve driver, a pressure comparison unit, a freeze determination unit, and an EGR controller. The valve driver drives an EGR valve to open, when fuel cut has been continued for a predetermined time in a state where an engine speed of a vehicle's engine is equal to or higher than a predetermined rotational speed. The pressure comparison unit compares a pre-driving pressure of an engine's intake pipe with a post-driving pressure of the intake pipe. The freeze determination unit sets a flag indicating that the EGR valve is frozen when a difference between the pre-driving pressure and the post-driving pressure is less than a predetermined value and an external temperature is less than a threshold. When the flag has been set, the EGR controller sets a control state of the EGR valve to a closed state and stops EGR control.Type: ApplicationFiled: September 22, 2021Publication date: March 24, 2022Applicant: SUBARU CORPORATIONInventors: Kenichi YAMAMOTO, Kenji HIJIKATA, Masafumi HANAZAWA, Tomomichi SHIONO, Daisuke KUGO, Noriyuki MATSUDA
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Patent number: 9233605Abstract: A variable duct apparatus for a vehicle including first and second louvers to rotate around first and second axes to open and closed positions, the variable duct apparatus including: a link to connect first and second louvers; first and second stoppers disposed at the first and second louvers to control the first and second louvers at an open position; a motor to rotate the first louver; and a control device to perform an opening or closing operation for rotating the first louver to the open or closed position by supplying current to the electric motor until a lock current is detected. The control device includes an abnormality determining unit to determine that an operating state is abnormal when an operating angle of the first louver from a start of the opening or closing operation until detection of the lock current is out of a predetermined reference operating angle range.Type: GrantFiled: March 26, 2014Date of Patent: January 12, 2016Assignee: FUJI JUKOGYO KABUSHIKI KAISHAInventor: Kenji Hijikata
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Patent number: 9120487Abstract: In a driving force control apparatus of a vehicle of the present invention, a calculation portion of a meter_ECU outputs a mode selected by a mode selection switch or a temporary switch to a calculation portion as a request mode and has a multi-information display 12 display the mode selected by a driver. A calculation portion of an E/G_ECU outputs the request mode to a throttle control calculation portion and a transmission control calculation portion as a control mode for throttle opening-degree control and transmission control of a transmission with a driving force characteristic of the corresponding mode. A control mode arbitration calculation portion forcedly switches the control mode to a normal mode during warming-up driving or when a shift select lever is set to an R range. At this time, display of the request mode is not switched but the mode selected by the driver is displayed.Type: GrantFiled: May 22, 2007Date of Patent: September 1, 2015Assignee: FUJI JUKOGYO KABUSHIKI KAISHAInventor: Kenji Hijikata
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Publication number: 20140295749Abstract: A variable duct apparatus for a vehicle including first and second louvers to rotate around first and second axes to open and closed positions, the variable duct apparatus including: a link to connect first and second louvers; first and second stoppers disposed at the first and second louvers to control the first and second louvers at an open position; a motor to rotate the first louver; and a control device to perform an opening or closing operation for rotating the first louver to the open or closed position by supplying current to the electric motor until a lock current is detected. The control device includes an abnormality determining unit to determine that an operating state is abnormal when an operating angle of the first louver from a start of the opening or closing operation until detection of the lock current is out of a predetermined reference operating angle range.Type: ApplicationFiled: March 26, 2014Publication date: October 2, 2014Applicant: Fuji Jukogyo Kabushiki KaishaInventor: Kenji HIJIKATA
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Patent number: 8406973Abstract: The present invention provides a driving force control unit for a vehicle having an accelerator opening degree detecting unit for detecting accelerator opening degree, a driving condition detecting unit for detecting engine driving condition, a driving force setting unit for setting a driving force indication value according to a plurality of different driving force characteristics based on the accelerator opening degree and the engine driving condition, a selector for selecting a driving force characteristic from the plural of different driving force characteristics by manipulation. The driving force setting unit setting the driving force indication value according to the selected driving force characteristic.Type: GrantFiled: April 6, 2007Date of Patent: March 26, 2013Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Toshio Masuda, Kenichi Yamamoto, Kenji Hijikata, Satoshi Satomura, Hiroshi Oishi, Toyohide Sunaguchi, Yoshio Iwakami, Munenori Homma, Atsushi Atake, Kouji Kaneda, Tatsuru Fukuda, Minoru Yuki, Masayuki Ushiki, Tsuyoshi Kobayashi, Masahito Motoi, Naoki Shibata, Hiroshi Ogiwara, Katsumasa Igarashi, Junzo Shinozuka, Akihisa Nakamura
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Patent number: 8352150Abstract: A storage unit provided in an engine control device stores three kinds of mode maps having different engine output characteristics. One of the mode maps is selected in accordance with the driving conditions, and a target torque is set by referring to the selected mode map using an engine speed and an accelerator opening-degree as parameters. A throttle opening-degree signal corresponding to the target torque is output to a throttle actuator, and an operation of opening or closing the throttle valve is performed in response to the throttle opening-degree signal.Type: GrantFiled: August 5, 2008Date of Patent: January 8, 2013Assignee: Fuji Jukogyo Kabushiki KaishaInventor: Kenji Hijikata
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Patent number: 8108084Abstract: The present invention provides a vehicle display device which allows a driver to instantaneously grasp driving force information. A meter_ECU displays a driving force display image which displays driving force information of a vehicle on an MID, displays an acceleration-torque line (driving force characteristic line) L corresponding to the currently selected mode M and, at the same time, changes a power level which is indicated in a power display region P set within the acceleration-torque line L interlockingly with an accelerator operation of a driver. Due to such a constitution, the vehicle display device allows the driver to instantaneously grasp the driving force information.Type: GrantFiled: April 6, 2007Date of Patent: January 31, 2012Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Toshio Masuda, Kenichi Yamamoto, Kenji Hijikata, Satoshi Satomura, Hiroshi Oishi, Toyohide Sunaguchi, Yoshio Iwakami, Munenori Homma, Atsushi Atake, Kouji Kaneda, Tatsuru Fukuda, Minoru Yuki, Masayuki Ushiki, Tsuyoshi Kobayashi, Masahito Motoi, Naoki Shibata, Hiroshi Ogiwara, Katsumasa Igarashi, Junzo Shinozuka, Akihisa Nakamura
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Patent number: 7772970Abstract: The present invention provides a vehicle display device which can display fuel consumption information of a vehicle in a useful and optimum mode for a driver. A meter_EUC calculates an instantaneous fuel consumption of a vehicle based on a mileage and a fuel injection quantity within a set time, calculates an average fuel consumption of the vehicle based on respective cumulative values of the mileage and the fuel injection quantity repeatedly calculated for every set time, and displays the deviation of the instantaneous fuel consumption with respect to the average fuel consumption as fuel consumption information on a fuel consumption meter. The display on the fuel consumption meter is performed by swinging a pointer with respect to a neutral position.Type: GrantFiled: April 5, 2007Date of Patent: August 10, 2010Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Toshio Masuda, Kenichi Yamamoto, Kenji Hijikata, Satoshi Satomura, Hiroshi Oishi, Toyohide Sunaguchi, Yoshio Iwakami, Munenori Homma, Kouji Kaneda, Atsushi Atake, Tatsuru Fukuda, Masayuki Ushiki, Minoru Yuki, Tsuyoshi Kobayashi, Masahito Motoi, Naoki Shibata, Hiroshi Ogiwara, Katsumasa Igarashi, Junzo Shinozuka, Akihisa Nakamura
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Patent number: 7747374Abstract: The driving force control unit for a vehicle comprises a plurality of control modes for controlling a driving force, each of control modes having each driving force characteristic, a vehicle driving condition detecting unit for detecting a vehicle driving condition, a selector for selecting one control mode from the control modes, a temporary selector for changing the current mode to other mode, and a driving force indication value setting unit for setting a driving force indication value according to the vehicle driving condition and the driving force characteristic corresponding to the selected mode by the selector or the temporary selector.Type: GrantFiled: April 6, 2007Date of Patent: June 29, 2010Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Toshio Masuda, Kenichi Yamamoto, Kenji Hijikata, Satoshi Satomura, Hiroshi Oishi, Toyohide Sunaguchi, Yoshio Iwakami, Munenori Homma, Atsushi Atake, Kouji Kaneda, Tatsuru Fukuda, Minoru Yuki, Masayuki Ushiki, Tsuyoshi Kobayashi, Masahito Motoi, Naoki Shibata, Hiroshi Ogiwara, Katsumasa Igarashi, Junzo Shinozuka, Akihisa Nakamura
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Patent number: 7742865Abstract: The driving force control unit comprises a plurality of control modes for controlling a driving force, each of control modes having each driving force characteristic; a vehicle driving condition detecting unit for detecting a vehicle driving condition; a selector for selecting one control mode from the plurality of control modes; a driving force setting unit for setting a driving force indication value according to the driving force characteristic selected by the selector based on the vehicle driving condition; and a shift lever position detector for detecting a shift lever position of a transmission. The control mode includes a reverse control mode having a reverse driving force characteristic suitable for traveling the vehicle in reverse direction. The driving force setting unit changes the control mode to the reverse control mode when the shift lever is detected in a position of a reverse range, and sets the driving force indication value according to the reverse driving force characteristic.Type: GrantFiled: April 6, 2007Date of Patent: June 22, 2010Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Toshio Masuda, Kenichi Yamamoto, Kenji Hijikata, Satoshi Satomura, Hiroshi Oishi, Toyohide Sunaguchi, Yoshio Iwakami, Munenori Homma, Atsushi Atake, Kouji Kaneda, Tatsuru Fukuda, Minoru Yuki, Masayuki Ushiki, Tsuyoshi Kobayashi, Masahito Motoi, Naoki Shibata, Hiroshi Ogiwara, Katsumasa Igarashi, Junzo Shinozuka, Akihisa Nakamura
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Publication number: 20100092724Abstract: A process for producing a carbon structural body is provided, with which a carbon structural body having any of various nanostructures can be produced inexpensively and efficiently. The method includes forming a carbon-containing material into a pattern, coating the obtained pattern with a proto-shaped mold, and calcining and carbonizing the coated pattern.Type: ApplicationFiled: November 21, 2006Publication date: April 15, 2010Applicants: MITSUBISHI CHEMICAL CORPORATION, NATIONAL UNIVERSITY CORPORATION HOKKAIDO UNIVERSITYInventors: Toshifumi Shiroya, Hiroyuki Aikyou, Masaki Yamamoto, Jun Enda, Masatsugu Shimomura, Sadaaki Yamamoto, Kuniharu Ijiro, Kenji Hijikata, Hiroshi Yabu, Yasutaka Matsuo, Masaru Tanaka
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Patent number: 7546197Abstract: A driving force control device can set driving force characteristics which conform to tastes of drivers using one vehicle thus giving the easy-to-drive feeling to the drivers. An E/G13ECU possesses three modes 1 to 3 as control modes and selects one mode from these modes based on a manipulation input using a mode selection switch. Further, any one of the mode out of these modes 1 to 3 is preset in the E/G13ECU as a temporary changeover mode, and the E/G13ECU changes over a mode selected by the mode selection switch and the preset temporary changeover mode alternatively by the temporary changeover switch.Type: GrantFiled: April 6, 2007Date of Patent: June 9, 2009Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Toshio Masuda, Kenichi Yamamoto, Kenji Hijikata, Satoshi Satomura, Atsushi Atake, Kouji Kaneda, Tatsuru Fukuda, Minoru Yuki, Masayuki Ushiki, Tsuyoshi Kobayashi, Masahito Motoi, Naoki Shibata, Hiroshi Ogiwara, Katsumasa Igarashi, Junzo Shinozuka, Akihisa Nakamura
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Patent number: 7487033Abstract: An engine control apparatus of the present invention sets a target torque ?e, when the save mode m2 is set as an engine mode, according to the formula: ?e?TRQ2*RATIO1+TRQ3*(1?RATIO1) Basic target torque TRQ2 and TRQ3 are set based on the engine speed Ne and the throttle opening-degree ?acc and with reference to the normal mode map Mp1 and the power mode map Mp3 respectively. The correction factor RATIO1 is an addition rate which is set based on an accelerator opening-degree ?acc and a vehicle speed V and with reference to a correction factor map Mr1. The correction factor map Mr1 stores a correction factor RATIO1 near 0 (although 1?RATIO1>0) when the vehicle speed V is low and the accelerator opening-degree ?acc is high.Type: GrantFiled: May 21, 2007Date of Patent: February 3, 2009Assignee: Fuji Jukogyo Kabushiki KaishaInventor: Kenji Hijikata
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Publication number: 20080300768Abstract: A storage unit provided in an engine control device stores three kinds of mode maps having different engine output characteristics. One of the mode maps is selected in accordance with the driving conditions, and a target torque is set by referring to the selected mode map using an engine speed and an accelerator opening-degree as parameters. A throttle opening-degree signal corresponding to the target torque is output to a throttle actuator, and an operation of opening or closing the throttle valve is performed in response to the throttle opening-degree signal.Type: ApplicationFiled: August 5, 2008Publication date: December 4, 2008Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventor: Kenji Hijikata
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Patent number: 7424361Abstract: The driving force control unit for vehicle comprises a driving condition detecting unit for detecting the vehicle driving condition, a selector for selecting one of driving modes by manipulation, the driving modes including a first mode having a driving force characteristic suitable for normal driving and a second mode having a suppressed driving force, and driving force setting unit for setting a driving force indication value based on the selected mode and the vehicle driving conditions. The selector being formed by a multiple switch having a push switch which turns to ON state when a pressing force direction manipulation is applied, and other switch which turns to ON state when manipulation other than the pressing force direction is applied, the second mode is selected by the ON manipulation of the push switch.Type: GrantFiled: April 6, 2007Date of Patent: September 9, 2008Assignee: Fuji Jukogyo Kabushiki KaishaInventors: Toshio Masuda, Kenichi Yamamoto, Kenji Hijikata, Satoshi Satomura, Hiroshi Oishi, Toyohide Sunaguchi, Yoshio Iwakami, Munenori Homma, Atsushi Atake, Kouji Kaneda, Tatsuru Fukuda, Minoru Yuki, Masayuki Ushiki, Tsuyoshi Kobayashi, Masahito Motoi, Naoki Shibata, Hiroshi Ogiwara, Katsumasa Igarashi, Junzo Shinozuka, Akihisa Nakamura
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Publication number: 20080162012Abstract: The present invention provides a driving force control unit for a vehicle having an accelerator opening degree detecting unit for detecting accelerator opening degree, a driving condition detecting unit for detecting engine driving condition, a driving force setting unit for setting a driving force indication value according to a plurality of different driving force characteristics based on the accelerator opening degree and the engine driving condition, a selector for selecting a driving force characteristic from the plural of different driving force characteristics by manipulation. The driving force setting unit setting the driving force indication value according to the selected driving force characteristic.Type: ApplicationFiled: April 6, 2007Publication date: July 3, 2008Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Toshio Masuda, Kenichi Yamamoto, Kenji Hijikata, Satoshi Satomura, Hiroshi Oishi, Toyohide Sunaguchi, Yoshio Iwakami, Munenori Homma, Atsushi Atake, Kouji Kaneda, Tatsuru Fukuda, Minoru Yuki, Masayuki Ushiki, Tsuyoshi Kobayashi, Masahito Motoi, Naoki Shibata, Hiroshi Ogiwara, Katsumasa Igarashi, Junzo Shinozuka, Akihisa Nakamura
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Publication number: 20080015768Abstract: The driving force control unit for a vehicle comprises a plurality of control modes for controlling a driving force, each of control modes having each driving force characteristic, a vehicle driving condition detecting unit for detecting a vehicle driving condition, a selector for selecting one control mode from the control modes, a temporary selector for changing the current mode to other mode, and a driving force indication value setting unit for setting a driving force indication value according to the vehicle driving condition and the driving force characteristic corresponding to the selected mode by the selector or the temporary selector.Type: ApplicationFiled: April 6, 2007Publication date: January 17, 2008Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Toshio Masuda, Kenichi Yamamoto, Kenji Hijikata, Satoshi Satomura, Hiroshi Oishi, Toyohide Sunaguchi, Yoshio Iwakami, Munenori Homma, Atsushi Atake, Kouji Kaneda, Tatsuru Fukuda, Minoru Yuki, Masayuki Ushiki, Tsuyoshi Kobayashi, Masahito Motoi, Naoki Shibata, Hiroshi Ogiwara, Katsumasa Igarashi, Junzo Shinozuka, Akihisa Nakamura
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Publication number: 20080015767Abstract: The driving force control unit comprises a plurality of control modes for controlling a driving force, each of control modes having each driving force characteristic; a vehicle driving condition detecting unit for detecting a vehicle driving condition; a selector for selecting one control mode from the plurality of control modes; a driving force setting unit for setting a driving force indication value according to the driving force characteristic selected by the selector based on the vehicle driving condition; and a shift lever position detector for detecting a shift lever position of a transmission. The control mode includes a reverse control mode having a reverse driving force characteristic suitable for traveling the vehicle in reverse direction. The driving force setting unit changes the control mode to the reverse control mode when the shift lever is detected in a position of a reverse range, and sets the driving force indication value according to the reverse driving force characteristic.Type: ApplicationFiled: April 6, 2007Publication date: January 17, 2008Applicant: FUJI JUKOGYO KABUSHIKI KAISHAInventors: Toshio Masuda, Kenichi Yamamoto, Kenji Hijikata, Satoshi Satomura, Hiroshi Oishi, Toyohide Sunaguchi, Yoshio Iwakami, Munenori Homma, Atsushi Atake, Kouji Kaneda, Tatsuru Fukuda, Minoru Yuki, Masayuki Ushiki, Tsuyoshi Kobayashi, Masahito Motoi, Naoki Shibata, Hiroshi Ogiwara, Katsumasa Igarashi, Junzo Shinozuka, Akihisa Nakamura