公开(公告)号：US20240170949A1

公开(公告)日：2024-05-23

申请号：US18283902

申请日：2022-02-02

Applicant: Hitachi Astemo, Ltd.

Inventor： Nobuyasu KANEKAWA ,  Takao FUKUDA ,  Hiroshi NAKANO

IPC: H02H5/04 ,  H02J7/00

CPC classification number: H02H5/041 ,  H02J7/00304 ,  H02J7/00309

Abstract: An electronic control system includes first through third measurement units that measure current, temperature and current or temperature, respectively. An electronic control device controls an operation of a power semiconductor element by using measurement results of the first through third measurement units. At least a part of the power semiconductor element incorporates the first and second measurement units, and the electronic control device estimates temperature from a measured value of the current. Whether the first measurement unit, the second measurement unit, and the third measurement unit are normal or abnormal on a basis of a measured value of the first measurement unit is determined, and an abnormality is determined of at least one of the power semiconductor element and a wire harness through which an output current of the power semiconductor element flows according to a measurement result of the measurement unit determined to be normal.

公开(公告)号：US20250105724A1

公开(公告)日：2025-03-27

申请号：US18730599

申请日：2022-12-27

Applicant: HITACHI ASTEMO, LTD.

Inventor： Ryoichi INADA ,  Hiroshi NAKANO ,  Nobuyasu KANEKAWA ,  Satoru SHIGETA

IPC: H02M1/32 ,  H02M7/483

Abstract: This power conversion device comprises: a power conversion circuit in which at least three-phases of upper/lower arm circuits having switching elements connected in series are connected in parallel and which outputs AC current to a motor via an output line, said AC current being generated by the switching elements of each phase; a breaker that is provided on the output line of each phase and allows the AC current to flow or interrupts the AC current; a first failure location determination unit that determines a failure location of the switching elements; a breaker control unit that sets, as a failure phase, a phase corresponding to the switching element determined as the failure location by the first failure location determination unit and controls the breaker of the failure phase so that the AC current of the failure phase is allowed to flow at a predetermined specific electric angle in one electric angle cycle and the AC current of the failure phase is interrupted at another electric angle except the specific electric angle; and a failure-time current control unit that controls the drive of other switching elements different from the switching element determined as the failure location.

公开(公告)号：US20230339484A1

公开(公告)日：2023-10-26

申请号：US17799407

申请日：2020-12-18

Applicant: Hitachi Astemo, Ltd.

Inventor： Tasuku ISHIGOOKA ,  Nobuyasu KANEKAWA ,  Tomohito EBINA ,  Kazuyoshi SERIZAWA ,  Tatsuya HORIGUCHI

IPC: B60W50/035 ,  G06F1/3234 ,  B60W60/00

CPC classification number: B60W50/035 ,  G06F1/3243 ,  B60W60/001

Abstract: Provided is a vehicle control device capable of executing control processing by utilizing a power saving execution determination unit that determines a shift to or a release from a normal mode to a power saving mode on the basis of a preset power saving condition, and a power saving execution unit that executes power saving control of the CPU by determining a shift to the power saving mode and stops the power saving control of the CPU by determining a release of the power saving mode. Then, the power saving execution determination unit has a plurality of power saving conditions, determines to shift to the power saving mode in a case where all of the plurality of power saving conditions are satisfied, and determines to release the power saving mode in the case of being changed to a state in which some of the power saving conditions are not satisfied.

公开(公告)号：US20230001912A1

公开(公告)日：2023-01-05

申请号：US17778605

申请日：2020-11-06

Applicant: Hitachi Astemo, Ltd.

Inventor： Hiroshi NAKANO ,  Nobuyasu KANEKAWA ,  Atsushi ARATA

IPC: B60W20/50 ,  B60W10/08 ,  B60W10/02

Abstract: A vehicle control system includes a first electric motor that causes a vehicle to travel, a second electric motor that generates power by using an output of a power source and starts the power source, a power storage device that stores the power generated by the second electric motor and supplies the power to the first electric motor, a monitoring device that monitors a failure state of the vehicle, and a switch that switches the vehicle to travel from the first electric motor to the second electric motor. In a case of a predetermined driving state in which the monitoring device detects a failure of the first electric motor and a driving force is obtained from the second electric motor, the monitoring device controls the switch to switch the driving force for causing the vehicle to travel from the first electric motor to the second electric motor.

公开(公告)号：US20220080987A1

公开(公告)日：2022-03-17

申请号：US17420045

申请日：2019-12-19

Applicant: Hitachi Astemo, Ltd.

Inventor： Teppei HIROTSU ,  Nobuyasu KANEKAWA ,  Atsushi ARATA

IPC: B60W50/02 ,  B60W50/023 ,  B60W60/00

Abstract: Provided is a device that prevents a vehicle behavior from being unstable when an operation is continued using a degeneration function at a time of failure of a drive unit command value generation function in an autonomous driving system. A future actuator command value outputted by a main function unit for generating a drive unit command value and a simple actuator command value outputted by the degeneration function of generating a drive unit command value are synthesized using a weighting factor that changes with time.

公开(公告)号：US20240399981A1

公开(公告)日：2024-12-05

申请号：US18700364

申请日：2022-07-27

Applicant: Hitachi Astemo, Ltd.

Inventor： Hiroshi NAKANO ,  Nobuyasu KANEKAWA ,  Takao FUKUDA ,  Kentaro JUMONJI

IPC: B60R16/02 ,  B60R16/03

Abstract: Included are: a current detection element which detects a current flowing through a wire harness which supplies power to in-vehicle equipment mounted on a vehicle; a standard temperature generation unit which obtains a standard temperature by using a predetermined value or a detection value of a predetermined temperature sensor among a plurality of temperature sensors mounted on the vehicle; a temperature estimation unit which estimates a temperature of the wire harness by using a current detection value and a standard temperature value; a shutoff determination unit which makes a shutoff determination on the basis of the estimated temperature; and a shutoff element which shuts off the current flowing through the wire harness on the basis of the determination made by the shutoff determination unit. This enables vehicle control without a dedicated temperature sensor.

公开(公告)号：US20230076114A1

公开(公告)日：2023-03-09

申请号：US17777872

申请日：2021-01-15

Applicant: HITACHI ASTEMO, LTD.

Inventor： Nobuyasu KANEKAWA ,  Hiroshi NAKANO ,  Atsushi ARATA ,  Takao FUKUDA

IPC: B60W20/50 ,  B60W50/029 ,  B60W10/08 ,  B60W10/06 ,  B60W10/02 ,  B60K6/442 ,  B60K6/48 ,  B60K6/46

Abstract: An object of the present invention is to realize a control device having operation continuity at the time of failure with less redundancy and reduce cost.
Provided is a vehicle control system including a transmission unit that transmits energy to a driving wheel, a first control unit that controls the transmission unit, a first source that inputs energy to the transmission unit, a second source that inputs energy to the transmission unit, a second control unit that controls the first source, and a third control unit that controls the second source, wherein when the first control unit fails, the second control unit or the third control unit controls the transmission unit.

公开(公告)号：US20230396055A1

公开(公告)日：2023-12-07

申请号：US18033577

申请日：2021-09-27

Applicant: Hitachi Astemo, Ltd.

Inventor： Hiroshi NAKANO ,  Nobuyasu KANEKAWA ,  Takao FUKUDA

IPC: H02H5/04 ,  B60R16/023

CPC classification number: H02H5/048 ,  B60R16/023

Abstract: A vehicle control device using a semiconductor fuse, and enabling an increase in size of the semiconductor fuse to be suppressed and the occurrence of an abnormal current to be detected early to enable shut off of the abnormal current. The vehicle control device includes a shut-off unit that supplies and shuts off a supply of power to a plurality of load devices; a current detector that detects a current flowing to the plurality of load devices; and a temperature detector that detects the temperature of the shut-off unit. Furthermore, the vehicle control device includes a drive controller that, when the temperature of the shut-off unit detected by the temperature detector exceeds a predetermined value, controls and restricts operation of the load devices for which the priority is low, based on priorities set for each of the plurality of load devices.

公开(公告)号：US20220242399A1

公开(公告)日：2022-08-04

申请号：US17597205

申请日：2020-07-07

Applicant: Hitachi Astemo, Ltd.

Inventor： Nobuyasu KANEKAWA ,  Atsushi ARATA

IPC: B60W20/50 ,  B60W50/029 ,  B60W50/02 ,  B60K6/442

Abstract: An object is to realize a control device having operation continuity when a failure occurs with less redundancy and reduce cost. In order to achieve the above object, the present invention devises the following means. (1) Different motive power (energy) sources provided in a hybrid drive system are regarded as redundant motive power (energy) sources. (2) A control unit (first control unit) of a transmission unit that mixes motive power (energy) from different motive power (energy) sources and transmits energy to a driving wheel is provided with a failure-time operation continuation function. (3) Control units (a second control unit and a third control unit) that respectively control the different motive power (energy) sources are configured to take a common cause failure measure such that both control functions are not lost due to the same failure. (4) When one motive power (energy) source or a control unit of the motive power (energy) source fails, an energy management control unit (fourth control unit) that controls the mixing ratio of the motive power (energy) from the different motive power (energy) sources in the transmission unit controls the transmission unit to transmit the energy to the driving wheel by the motive power (energy) from the other motive power (energy) source.

公开(公告)号：US20250050826A1

公开(公告)日：2025-02-13

申请号：US18723714

申请日：2023-02-06

Applicant: Hitachi Astemo, Ltd.

Inventor： Hiroshi NAKANO ,  Nobuyasu KANEKAWA ,  Takao FUKUDA ,  Kentaro JUMONJI

IPC: B60R16/02 ,  H02H5/04

Abstract: A vehicle control device includes: a current detecting unit for detecting a current flowing through a lead wire, and outputting a current detection value; a current interrupting unit for interrupting the current flowing through the lead wire; and a computing unit for computing a temperature rise value caused by Joule heat in the lead wire using the current detection value, estimating an environmental temperature of an environment in which the lead wire is wired based on the temperature rise value, outside air temperature information of a vehicle, inside air temperature information in a vehicle cabin, and solar radiation information, and determining whether to output a current interruption instruction to the current interrupting unit based on the temperature of the lead wire estimated using the environmental temperature.