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公开(公告)号：US20200047805A1
公开(公告)日：2020-02-13
申请号：US16654307
申请日：2019-10-16
Applicant: DENSO CORPORATION
Inventor： Atsuko OKA , Shuji KURAMITSU , Koichi NAKAMURA , Yuki WATANABE , Toshihiro FUJITA , Takaharu KOZAWA , Shuhei MIYACHI , Katsuhiko HAYASHI , Masaya TAKI , Toshimitsu SAKAI
IPC: B62D15/02 , B62D5/04 , B60R16/027
Abstract: A steering angle detection device includes plural control units and plural steering angle sensors. Each control unit is configured to transmit steering angle information related to a steering angle of a vehicle to an external device and transmit and receive information mutually therebetween. Each steering angle sensor is provided in correspondence to each control unit and configured to output a sensor signal corresponding to a detection value of a change in the steering angle to the corresponding control unit. One of the control units transmits, as a transmission control unit, the steering angle information to the external device at one transmission timing.
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公开(公告)号：US20210226572A1
公开(公告)日：2021-07-22
申请号：US17221360
申请日：2021-04-02
Applicant: DENSO CORPORATION
Inventor： Takashi SUZUKI , Daisuke KOBAYASHI , Masaya TAKI
IPC: H02P29/024 , H02P27/12 , B62D5/04 , H02P21/22 , H02P25/22
Abstract: A current sensor state determination device determines that an abnormality is caused in a current sensor when a sum of phase currents based on current detection values from each of the current sensors in three phases is greater than a first determination value, and determines that no abnormality is caused in the current sensor when the sum of phase currents is equal to or less than the first determination value. The state determination device determines that the current sensor is normal when it is determined that (i) no abnormality is caused in a preset electric angle range equal to or less than one electric-angle cycle of the rotating electric machine and (ii) a value of an electric current flowing in the rotating electric machine in a rotating coordinates system calculated based on the current detection value is equal to or greater than a second determination value.
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公开(公告)号：US20200047806A1
公开(公告)日：2020-02-13
申请号：US16654314
申请日：2019-10-16
Applicant: DENSO CORPORATION
Inventor： Takaharu KOZAWA , Shuji KURAMITSU , Koichi NAKAMURA , Yuki WATANABE , Atsuko OKA , Toshihiro FUJITA , Shuhei MIYACHI , Masaya TAKI , Toshimitsu SAKAI , Katsuhiko HAYASHI
IPC: B62D15/02 , B62D5/04 , B60R16/027
Abstract: A steering angle detection device is provided with a plurality of rotation angle sensors and a plurality of control units. The rotation angle sensors are capable of at least continuously calculating a rotation speed while an ignition switch of a vehicle is turned off, and are provided so as to correspond to steering angle calculation units which calculate steering angle based on the rotation speed and a rotation angle acquired from the rotation angle sensors and midpoint information related to the neutral position of a steering member. Power supplies are provided on a per-system basis. The rotation angle sensors or the control units are capable of holding the midpoint information while the ignition switch is turned off. If a power supply abnormality resulting in power supply failure occurs in some of the systems, the control unit of the abnormal system acquires the midpoint information and the rotation speed from the control unit of a normal system when the ignition switch is turned on.
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公开(公告)号：US20200091850A1
公开(公告)日：2020-03-19
申请号：US16571446
申请日：2019-09-16
Applicant: DENSO CORPORATION
Inventor： Go ENDOH , Masaya TAKI , Hiroyasu OTAKE
Abstract: In a motor driving device, a current detector detects a value of the motor current, and a limit variable calculator calculates a calculation value of a limit variable for limiting the command current. A determiner determines, based on a relationship between the value of the motor current and the calculation value of the limit variable, whether the motor current is in a less-response situation to change of the command current. A current limiter determines whether to limit a value of the command current based on the calculation value of the limit variable in accordance with a result of the determination of whether the motor current is in the less-response situation to change of the command current.
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公开(公告)号：US20190283800A1
公开(公告)日：2019-09-19
申请号：US16296851
申请日：2019-03-08
Applicant: DENSO CORPORATION
Inventor： Masaya TAKI , Koichi NAKAMURA , Toshimitsu SAKAI , Nobuyori NAKAJIMA
Abstract: An ECU includes a plurality of motor driving circuits for driving at least one motor, a plurality of computers and a plurality of clock circuits. A first computer, which is at a synchronization signal transmission-side, transmits a synchronization signal to a second computer, which is at a synchronization signal reception-side. The first computer and the second computer execute a plurality of specific periodic processes, which are processes executed at cycle periods (for example, 200 μs, 400 μs) of different natural number multiples of a cycle period (for example, 200 μs) of the synchronization signal and need be synchronized. Each timing of the plurality of specific periodic processes is determined based on one synchronization signal.
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Patent Agency Ranking
公开(公告)号：US20190144030A1
公开(公告)日：2019-05-16
申请号：US16243519
申请日：2019-01-09
Applicant: DENSO CORPORATION
Inventor： Toshimitsu SAKAI , Masaya TAKI , Shuji KURAMITSU , Koichi NAKAMURA
Abstract: A motor control apparatus include: multiple motor drive circuits that drives at least one motor; multiple microcomputers that include a drive signal generator, and a drive timing generator; and multiple clock generation circuits. The microcomputers include a synchronization signal transmitter microcomputer as at least one microcomputer that transmits a synchronization signal synchronized with the drive timing of an own microcomputer and synchronizing the drive timing of the microcomputers. The microcomputers include a synchronization signal receiver microcomputer as at least one microcomputer that receives the synchronization signal transmitted from the synchronization signal transmitter microcomputer.
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公开(公告)号：US20190229746A1
公开(公告)日：2019-07-25
申请号：US16249072
申请日：2019-01-16
Applicant: DENSO CORPORATION
Inventor： Masaya TAKI
Abstract: A signal control device includes a charge/discharge circuit, a sampling capacitor, and an AC conversion circuit. The charge/discharge circuit is capable of charging or discharging the sampling capacitor. The AC conversion circuit performs an AD conversion by converting an analog voltage value charged in the sampling capacitor into an AD conversion value that is a digital value. After a charge operation or a discharge operation to the sampling capacitor with the charge/discharge circuit, the AD conversion circuit performs the AD conversion, and a malfunction of the charge/discharge circuit is determined based on a diagnosis result of the AD conversion value.
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公开(公告)号：US20190144029A1
公开(公告)日：2019-05-16
申请号：US16243503
申请日：2019-01-09
Applicant: DENSO CORPORATION
Inventor： Masaya TAKI , Toshimitsu SAKAI , Koichi NAKAMURA , Shuji KURAMITSU
CPC classification number: B62D5/0463 , B62D5/0403 , B62D5/0412 , B62D5/0457 , B62D5/0481 , B62D6/08 , G06F1/06 , G06F1/12 , G06F1/26 , G06F9/4401 , H02P25/22 , H02P27/06
Abstract: A motor control apparatus includes: multiple motor drive circuits that drive at least one motor; and multiple microcomputers that are operated by a microcomputer power source and include a drive signal generator that generates a motor drive signal. The microcomputers include at least one microcomputer including a stop determiner that determines that operation of an own microcomputer is about to be stopped and transmits information as a stop determination signal. A microcomputer having received the stop determination signal from at least one different microcomputer actually stops operation of an own microcomputer.
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公开(公告)号：US20190144028A1
公开(公告)日：2019-05-16
申请号：US16243460
申请日：2019-01-09
Applicant: DENSO CORPORATION
Inventor： Masaya TAKI , Shuji KURAMITSU , Koichi NAKAMURA , Toshimitsu SAKAI
Abstract: A synchronization signal generating portion of a transmitter microcomputer generates a synchronization signal that is synchronized with a drive timing of the own microcomputer and also causes to synchronize the drive timing of microcomputers, and transmits to a receiver microcomputer. A timing corrector of the receiver microcomputer is capable of correcting the drive timing of the own microcomputer so as to synchronize with the received synchronization signal, and includes a timing determiner which determines whether the received synchronization signal is normal or abnormal. The receiver microcomputer permits the timing correction if the synchronization signal is determined to be normal in the timing determination, and prohibits timing correction and drives the motor asynchronously with the transmitter microcomputer if the synchronization signal is determined to be abnormal.
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公开(公告)号：US20180058962A1
公开(公告)日：2018-03-01
申请号：US15685919
申请日：2017-08-24
Applicant: DENSO CORPORATION
Inventor： Koichi NAKAMURA , Masaya TAKI
CPC classification number: G01L5/221 , B62D5/049 , B62D6/10 , G01L25/003 , G05B15/02
Abstract: In a sensor device, microcomputers acquire detection signals from plural sensor sections. A first signal line includes a main line and a sub line, and is capable of bidirectional communication between the sensor section and the microcomputers. A second signal line includes a main line and a sub line, and is capable of bidirectional communication between the sensor section and the microcomputers. A trigger signal is transmitted to the sensor section from the first microcomputer via the main line. A trigger signal is transmitted to the sensor section from the second microcomputer via the main line. Detection of steering torque can be continued in the occurrence of an abnormality in part of the sensor sections or microcomputers.
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