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公开(公告)号：US20190248407A1
公开(公告)日：2019-08-15
申请号：US16267743
申请日：2019-02-05
Applicant: DENSO CORPORATION
Inventor： Koichi NAKAMURA , Nobuyori NAKAJIMA , Go ENDOH , Yosuke OGI , Atsuko OKA
IPC: B62D5/04
CPC classification number: B62D5/0463 , B62D5/0481
Abstract: A steering control apparatus controlling an electric power steering apparatus includes a first control part and a second control part. The first control part communicates with an external device and executes a specific process. The second control part communicates with the first control part and executes the specific process. The first control part can acquire first information and second information. When all of the first information and the second information are positive, the first control part transmits positive information to the external device. When a part of the first information and the second information is negative, the first control part transmits negative information to the external device.
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公开(公告)号：US20200180685A1
公开(公告)日：2020-06-11
申请号：US16702912
申请日：2019-12-04
Applicant: DENSO CORPORATION
Inventor： Takashi SUZUKI , Shuji KURAMITSU , Nobuyori NAKAJIMA , Go ENDOH , Haruo SUZUKI , Koichi NAKAMURA , Yosuke OGI , Atsuko OKA
Abstract: A steering system in a vehicle includes a plurality of subsystems provided with a control unit. The control unit includes a storage unit storing steer angle information regarding a steer angle of one of a steering mechanism and a steered mechanism when the steering mechanism or the steered mechanism stops, an abnormality determiner determining abnormality of the motor rotation detection value and the detection circuit in the plurality of subsystems at a start time of a motor based on a comparison of at least two parameters, and a steer angle calculator calculating the steer angle based on the parameters having been determined by the abnormality determiner as not abnormal.
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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：US20200321769A1
公开(公告)日：2020-10-08
申请号：US16835841
申请日：2020-03-31
Applicant: DENSO CORPORATION
Inventor： Kouichi NAKAMURA , Hideki KABUNE , Atsuko OKA
Abstract: In a control device, control circuit units are connected to separate circuit power sources and to separate grounds. Ground monitor circuits respectively have a first resistor with one end connected to a voltage source, a second resistor with one end connected to an input terminal of a corresponding control circuit unit, and a capacitor. Among the one end of the first resistor, an other end of the first resistor, and the other end of the second resistor, at least one is connected to the subject system, and at least one is connected to an other system, and the control circuit unit monitors a ground abnormality of the other system based on a terminal voltage of the input terminal to which the second resistor is connected.
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公开(公告)号：US20190039643A1
公开(公告)日：2019-02-07
申请号：US16083665
申请日：2017-02-01
Applicant: DENSO CORPORATION
Inventor： Atsuko OKA , Shuji KURAMITSU , Koichi NAKAMURA
Abstract: A sensor device includes: multiple sensor units, each of which includes multiple sensor elements and a signal processing unit that generates and transmits an output signal including multiple detection signals corresponding to detection values of the sensor elements; and multiple control units, each of which includes a communication unit that receives the output signal, an abnormality monitoring unit that monitors abnormality of the respective sensor unit, and a physical quantity computation unit that computes a physical quantity based on at least one of the detection signals which is normal. One control unit mutually transmits and receives the detection signals as subject sensor signals received from the respective sensor unit and the detection signals as other sensor signals received from another one of the control units with another system control unit.
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Patent Agency Ranking
公开(公告)号：US20200207408A1
公开(公告)日：2020-07-02
申请号：US16711794
申请日：2019-12-12
Applicant: DENSO CORPORATION
Inventor： Koichi NAKAMURA , Nobuyori NAKAJIMA , Go ENDOH , Yosuke OGI , Atsuko OKA , Shuji KURAMITSU , Takashi SUZUKI , Haruo SUZUKI
Abstract: A motor controller for controlling a motor includes first and second angle sensors detecting motor rotation, and first and second detection circuits detecting rotation number information based on sensor output from the angle sensors. Further, the motor controller includes a steer angle information obtainer obtaining steer angle information involving steering of a vehicle from an external sensor, which is different from the angle sensors, and an abnormality determiner determining abnormality of information that has a matching degree of lower than a preset value when post-conversion information, or value measured by the same characteristics. This information is compared with each other after conversion from the rotation number information and from the steer angle information, and is used by a control amount calculator to calculate a control amount of the motor based on the information determined as having no abnormality by the abnormality determiner.
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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：US20190241214A1
公开(公告)日：2019-08-08
申请号：US16264282
申请日：2019-01-31
Applicant: DENSO CORPORATION
Inventor： Atsuko OKA , Nobuyori NAKAJIMA , Go ENDOH , Koichi NAKAMURA , Yosuke OGI
CPC classification number: B62D6/10 , B62D5/0463
Abstract: Inverter circuits are provided for motor winding sets, respectively. Control units are provided for the motor winding sets to generate control signals related to driving of the inverter circuits and control currents flowing through the motor winding sets, respectively, thereby controlling driving of a motor. The control mode includes a manual steering mode for controlling the motor according to a steering operation on a steering wheel by a driver and an automatic steering mode for controlling the motor independently of the steering operation on the steering wheel by the driver. The control units are capable of switching the control modes and differentiate the current control according to the control mode. By making the current control different according to the control mode, it is possible to attain optimal characteristics which correspond to each control mode.
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公开(公告)号：US20190081585A1
公开(公告)日：2019-03-14
申请号：US16083691
申请日：2017-02-24
Applicant: DENSO CORPORATION
Inventor： Koichi NAKAMURA , Shuji KURAMITSU , Atsuko OKA
CPC classification number: H02P21/34 , B62D5/0403 , B62D5/046 , H02P6/20 , H02P21/22 , H02P25/22 , H02P27/06
Abstract: A control system includes a plurality of control devices each including an initial check unit that performs an initial check before drive control of a rotary electric machine, a transmission/reception unit that transmits/receives an end signal indicating that the initial check is ended, and a drive control unit that performs the drive control of the rotary electric machine after the initial check. The drive control unit starts the drive control of the rotary electric machine when the initial check of the corresponding control device is ended and the end signal is acquired from another control device, and starts the drive control of the rotary electric machine after a lapse of a predetermined time from the start of the initial check of the corresponding control device when the initial check of the corresponding control device is ended and the end signal is not acquired from the another control device.
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公开(公告)号：US20180102719A1
公开(公告)日：2018-04-12
申请号：US15726774
申请日：2017-10-06
Applicant: DENSO CORPORATION
Inventor： Atsuko OKA , Shuji KURAMITSU , Koichi NAKAMURA
CPC classification number: H02P6/12 , H02P6/17 , H02P21/18 , H02P21/22 , H02P23/14 , H02P25/145 , H02P27/08 , H02P27/085 , H02P29/024 , H02P29/68
Abstract: In a current sensor abnormality diagnosis device, an abnormality judgment section determines that the phase current sensors are operating normally when a sum of three phase currents is not more than a threshold value, and a bus current sensor is operating normally based on a comparison result between three phase currents and a bus current. The abnormality judgment section detects which the phase current sensor has failed based on the three phase currents and the bus current when the sum of the three phase currents is more than the threshold value. Because of using the comparison results of the three phase currents with the bus current in addition to the sum of the three phase currents, it is possible for the abnormality judgment section to detect the occurrence of abnormality of each of these current sensors even if the detected current has an undefined value.
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