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公开(公告)号：US20220190874A1
公开(公告)日：2022-06-16
申请号：US17432288
申请日：2020-02-21
Applicant: Hitachi Astemo, Ltd.
Inventor： Yutaka UEMATSU , Hideyuki SAKAMOTO , Masahiro TOYAMA , Hidetatsu YAMAMOTO
Abstract: A signal transmission circuit that is connected to a communication unit by a signal wiring and performs signal transmission to/from the communication unit via the signal wiring includes: a direct-current supply unit that outputs a direct current with a variable output voltage, superimposes the direct current on the signal, and supplies the direct current to the communication unit via the signal wiring; a signal reception unit that receives the signal from the communication unit; and a signal processing unit that performs signal processing based on the signal received by the signal reception unit, wherein the signal reception unit has an equalizer function that adjusts a waveform of the signal to compensate for attenuation due to the signal wiring, and the output voltage is controlled based on an equalizer setting value used for control of the equalizer function.
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公开(公告)号：US11358432B2
公开(公告)日：2022-06-14
申请号：US17277538
申请日：2019-09-11
Applicant: Hitachi Astemo, Ltd.
Inventor： Ryusuke Hirao , Nobuyuki Ichimaru
IPC: B60G17/016 , B60G17/08 , B60G13/08 , B60G17/018 , F16F9/53
Abstract: Provided a suspension control apparatus including a vehicle behavior detection unit (acceleration sensors), an electrorheological damper provided between a vehicle body (1) and each wheel (2), and a controller configured to execute control so that a damping force of each electrorheological damper is adjusted based on a detection result obtained by the vehicle behavior detection unit. The controller includes a target voltage value setting unit (damping force command calculation unit) configured to obtain a target voltage value to be applied to an electrode tube based on the detection result obtained by the vehicle behavior detection unit, a temperature estimation unit configured to detect or estimate temperature of ERF, and a target voltage value correction unit (output limiting unit) configured to change the target voltage value so that a piston speed (V) is adjusted based on a value obtained by the temperature estimation unit.
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公开(公告)号：US20220182006A1
公开(公告)日：2022-06-09
申请号：US17540595
申请日：2021-12-02
Applicant: Hitachi Astemo, Ltd.
Inventor： Yuta NAKAMURA , Masatoshi GOTO , Yoshinori SAGIYA , Kazunari KUROKAWA , Shugo UENO , Shintaro TAI
IPC: H02P29/028 , H02M1/32 , H02P27/06 , H02P29/024
Abstract: A control device that does not require arithmetic processing of a phase current can be provided. A control device in which a plurality of switching legs including a pair of semiconductor switching elements constituting an upper arm and a lower arm are provided in a number corresponding to the number of phases of a motor that is a load includes a switch short circuit detection unit configured to detect a short circuit failure of the semiconductor switching element, and a control unit configured to execute determination processing of determining whether the short circuit failure has occurred in the upper arm or the lower arm on the basis of a result of detection by the switch short circuit detection unit, and to set all the semiconductor switching elements that constitute an arm in which a short circuit failure has occurred on the basis of a result of the determination processing.
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公开(公告)号：US11339736B2
公开(公告)日：2022-05-24
申请号：US17386212
申请日：2021-07-27
Applicant: Hitachi Astemo, Ltd.
Inventor： Masaya Kimura , Kyohei Matsumoto , Ryo Sasaki , Takuya Ikemoto , Daichi Kawakami
IPC: F02D41/20
Abstract: An electromagnetic valve driving device includes: a maximum detection unit configured to detect a maximum point when time-series data of a differential value of a counter electromotive voltage generated in a solenoid has changed from an increase to a decrease by retrospectively tracing the time-series data in an opposite direction of a time series; and a valve closing time detection unit configured to execute a determination process of retrospectively tracing the time-series data from the maximum point detected by the maximum detection unit in the opposite direction and scanning whether or not an amount of decrease in the differential value from the maximum point exceeds a predetermined threshold value and detect a maximum time, which is a time of the maximum point, as a valve closing time of a fuel injection valve when there is an event in which the amount of decrease exceeds the predetermined threshold value.
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公开(公告)号：US20220158566A1
公开(公告)日：2022-05-19
申请号：US17439044
申请日：2020-01-30
Applicant: Hitachi Astemo, Ltd.
Inventor： Takeshi SEKI , Ayumu HATANAKA , Naoya SUTO
Abstract: A negative-side bus bar 41 includes a capacitor connection portion and first and second negative terminal portions 271 exposed from a resin portion 44 and connected to a DC negative-side terminals 103 of first and second power semiconductor modules 30. A partition portion 252b of a case 252 is provided with a protruding portion 281 that protrudes toward a mold bus bar 40 further than an upper surface 257 of the first and second power semiconductor modules 30 and is thermally coupled to the mold bus bar 40. The projecting portion 281 is disposed between a root portion 275 of an exposed portion where the first negative electrode terminal portion 271 is exposed from the resin portion 44 and a second root portion 275 of an exposed portion where the second negative electrode terminal portion 271 is exposed from the resin portion 44. In this manner, a spatial distance and a creepage distance between the exposed portion from the resin portion of the mold bus bar and the power semiconductor module are made large and the temperature rise of a capacitor is suppressed.
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Patent Agency Ranking
公开(公告)号：US20220148344A1
公开(公告)日：2022-05-12
申请号：US17433080
申请日：2020-02-21
Applicant: Hitachi Astemo, Ltd.
Inventor： Hidetoshi TERAOKA , Masashi YANO
Abstract: There is provided an arithmetic operation device which is connected to a plurality of electronic control units. One or more electronic control units of the plurality of electronic control units constitute each of functions. The arithmetic operation device includes an external communication unit which receives, for each function, function configuration information including first verification information and first identification information of the one or more electronic control units constituting the function, an acquisition unit which acquires version information of software installed on the electronic control unit and second identification information of the electronic control unit from each of the plurality of electronic control units, a calculation unit which calculates, for each function, second verification information by using the version information acquired by the acquisition unit which is the version information of all the electronic control units constituting the function and the second identification information of all the electronic control units constituting the function, and a determination unit that determines, for each function, whether or not the first verification information and the second verification information match.
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公开(公告)号：US20220134890A1
公开(公告)日：2022-05-05
申请号：US17284889
申请日：2019-09-12
Applicant: Hitachi Astemo, Ltd.
Inventor： Noriya NAKAO , Fumikazu TAKAHASHI , Kenichi YOSHIDA
Abstract: A motor drive device (200) includes: a power conversion circuit (204) that drives an AC motor; and a controller (203) that controls the power conversion circuit. The controller includes: a command current calculation unit (206) that generates a command current according to command torque for the AC motor; a current control unit (208) that performs feedback control for adjusting a current applied to the AC motor to the command current; and a control gain setting unit (207) that calculates a control gain used for the feedback control based on the command torque and sets the calculated control gain in the current control unit. The control gain setting unit performs control such that a time from a decrease of an absolute value of the command torque to switching of the control gain is longer than a time from an increase of the absolute value of the command torque to switching of the control gain. As a result, deterioration of control stability of motor torque during a transient response is avoided.
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公开(公告)号：US20220131440A1
公开(公告)日：2022-04-28
申请号：US17430555
申请日：2020-02-05
Applicant: Hitachi Astemo, Ltd.
Inventor： Atsuji SAITO , Satoshi USUI
Abstract: A coil component of an electromagnetic valve is made compact to achieve both low cost and improvement in sound vibration performance. Therefore, a high-pressure fuel pump of the present invention includes: a coil 3g; a magnetic core 3e that is arranged on a side opposite to a pressurizing chamber 11 with respect to a movable core 3h and attracts the movable core 3h when the coil 3g is energized; a yoke 3q arranged on a radially outer side of the coil 3g; a cover portion 3r that covers the coil 3g from an axially outer side; and a molded portion 17 that covers a radially outer side of the yoke 3q and an axially outer side of the cover portion 3r.
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公开(公告)号：US20220126836A1
公开(公告)日：2022-04-28
申请号：US17426775
申请日：2020-01-30
Applicant: Hitachi Astemo, Ltd.
Inventor： Kimiyoshi MACHII , Takehito OGATA , Noriyasu HASEJIMA , Masayoshi KURODA , Kosuke SAKATA
IPC: B60W40/076 , G01S17/89 , G06V20/56 , B60W60/00
Abstract: Provided is a travel road recognition device that can accurately recognize a travel road end of a travel road on which an own vehicle travels. A travel road recognition device of the present invention is a travel road recognition device that recognizes the travel road end of the travel road on which an own vehicle 301 travels, and includes: a laser radar 101 that emits a laser bean from the own vehicle 301 toward the travel road; a road surface determination unit 203 that obtains a cross slope of the travel road based on coordinate values of a point cloud obtained by the laser radar 101; and a road end determination unit 204 that obtains a change point at which a slope angle changes in the cross slope of the travel road obtained by the road surface determination unit 203, and obtains coordinate values of at least one travel road end of both sides in a cross direction of the travel road based on the coordinate values of the change point.
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公开(公告)号：US20220126406A1
公开(公告)日：2022-04-28
申请号：US17434021
申请日：2020-01-15
Applicant: HITACHI ASTEMO, LTD.
Inventor： Shimpei TODA , Ryuichi YAMANAKA , Michinori NAKAYAMA , Daimu INOUE
IPC: B23P15/10
Abstract: A production method for a cylinder device includes a first liquid injection step of injecting a first predetermined amount of working fluid L into the inner cylinder, a first piston rod insertion step of inserting an assembly between the piston rod and the piston into the inner cylinder to dispose the piston at a predetermined position inside the inner cylinder, a second liquid injection step of injecting a second predetermined amount of the working fluid into an upper side of the piston inside the inner cylinder, and a closing step of closing the opening of the outer cylinder with the closing member.
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