Patents by Inventor Masaki Nishiyama

Masaki Nishiyama 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).

  • Patent number: 11970118
    Abstract: An optical unit includes an optical sensor, a protective cover disposed in a direction of view from the optical sensor, an actuator to drive the protective cover, and a casing including a space between the casing and the protective cover and to which the optical sensor and the protective cover are attached. A first region on the casing adjacent to an outer edge of the protective cover with the space interposed between the casing and the outer edge of the protective cover is a hydrophobic region where a contact angle of a droplet is equal to or larger than a predetermined angle.
    Type: Grant
    Filed: November 16, 2020
    Date of Patent: April 30, 2024
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kenji Nishiyama, Yasuhiro Shimizu, Masaki Nagata
  • Patent number: 11065962
    Abstract: An inverter ECU is applied to a hybrid vehicle having an engine and a motor generator as drive power source and a motor generator control system. A drive control part generates drive signals for an inverter based on torque request to the motor generator. A temperature information acquiring part acquires an element temperature value and a cooling water temperature value as an inverter temperature value. An abnormality detection part detects whether the inverter temperature value is within a diagnosable temperature range, and performs abnormality detection for the motor generator control system when the inverter temperature value is within the diagnosable temperature range. When the inverter temperature value is not placed within the diagnosable temperature range, the energy supplied to the inverter is adjusted to move the inverter temperature value into the diagnosis allowable temperature range to correctly perform the abnormality detection.
    Type: Grant
    Filed: May 2, 2018
    Date of Patent: July 20, 2021
    Assignee: DENSO CORPORATION
    Inventors: Masaki Nishiyama, Hirofumi Yamashita
  • Patent number: 10594240
    Abstract: In a MG control device, a standard voltage calculation part calculates a d axis standard voltage and a q axis standard voltage in a standard state in which no demagnetization occurs in permanent magnets of a MG. A magnetic flux change amount estimation value calculation part calculates a basic magnetic flux change amount estimation value based on a deviation of a specific value from the q-axis standard voltage. This specific value is obtained by multiplying q axis real voltage with a ratio of the d axis standard voltage and the d axis real voltage. A magnetic flux change amount estimation value correction part adjusts a magnetic flux change amount estimation value by correcting the basic magnetic flux change amount estimation value relatively to a detection threshold value based on characteristic change of the MG in a demagnetization state of the permanent magnets of the MG.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: March 17, 2020
    Assignee: DENSO CORPORATION
    Inventors: Takashi Ogawa, Masaki Nishiyama, Mitsuharu Matsuno
  • Patent number: 10536101
    Abstract: In a MG control device, a standard voltage calculation part calculates a d-axis standard voltage Vd_std and a q-axis standard voltage Vq_std to be supplied to a MG. A first magnetic flux change amount estimation value calculation part calculates a first magnetic flux change amount estimation value ??1 based on a deviation of a specific value from the q axis standard voltage Vq_std, where the specific value is obtained by multiplying a ratio (Vd_std/Vd_real) with a q-axis real voltage Vq_real, where Vd_real represents a d-axis real voltage. A second magnetic flux change amount estimation value calculation part calculates a second magnetic flux change amount estimation value ??2 based on a deviation of the q-axis real voltage Vq_real from the q-axis standard voltage Vq_std. The calculation switching part selects one of ??1 and ??2 based on an operation state of the MG.
    Type: Grant
    Filed: January 22, 2019
    Date of Patent: January 14, 2020
    Assignee: DENSO CORPORATION
    Inventors: Takashi Ogawa, Masaki Nishiyama, Mitsuharu Matsuno
  • Publication number: 20190229661
    Abstract: In a MG control device, a standard voltage calculation part calculates a d axis standard voltage and a q axis standard voltage in a standard state in which no demagnetization occurs in permanent magnets of a MG. A magnetic flux change amount estimation value calculation part calculates a basic magnetic flux change amount estimation value based on a deviation of a specific value from the q-axis standard voltage. This specific value is obtained by multiplying q axis real voltage with a ratio of the d axis standard voltage and the d axis real voltage. A magnetic flux change amount estimation value correction part adjusts a magnetic flux change amount estimation value by correcting the basic magnetic flux change amount estimation value relatively to a detection threshold value based on characteristic change of the MG in a demagnetization state of the permanent magnets of the MG.
    Type: Application
    Filed: January 22, 2019
    Publication date: July 25, 2019
    Applicant: DENSO CORPORATION
    Inventors: Takashi OGAWA, Masaki NISHIYAMA, Mitsuharu MATSUNO
  • Publication number: 20190229663
    Abstract: In a MG control device, a standard voltage calculation part calculates a d-axis standard voltage Vd_std and a q-axis standard voltage Vq_std to be supplied to a MG. A first magnetic flux change amount estimation value calculation part calculates a first magnetic flux change amount estimation value ??1 based on a deviation of a specific value from the q axis standard voltage Vq_std, where the specific value is obtained by multiplying a ratio (Vd_std/Vd_real) with a q-axis real voltage Vq_real, where Vd_real represents a d-axis real voltage. A second magnetic flux change amount estimation value calculation part calculates a second magnetic flux change amount estimation value ??2 based on a deviation of the q-axis real voltage Vq_real from the q-axis standard voltage Vq_std. The calculation switching part selects one of ??1 and ??2 based on an operation state of the MG.
    Type: Application
    Filed: January 22, 2019
    Publication date: July 25, 2019
    Applicant: DENSO CORPORATION
    Inventors: Takashi OGAWA, Masaki NISHIYAMA, Mitsuharu MATSUNO
  • Patent number: 10173551
    Abstract: A control apparatus is provided in a rotary electric machine driving system that includes a rotary electric machine for a vehicle and a control unit that controls driving of the rotary electric machine. The apparatus includes a malfunction determination section determining whether or not a system malfunction that requires torque limitation has occurred, a to-be-avoided state determination section determining whether or not the vehicle is in a to-be-avoided state, a torque limitation section limiting an output torque outputted from the rotary electric machine to a limiting torque smaller than a command torque, when the system malfunction is determined to have occurred and the vehicle is not in the to-be-avoided state, and a torque limitation relaxation section permitting the output torque to be a limitation relaxation torque larger than the limiting torque, when the system malfunction is determined to have occurred and the vehicle is in the to-be-avoided state.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: January 8, 2019
    Assignee: DENSO CORPORATION
    Inventors: Masaki Nishiyama, Hirofumi Yamashita
  • Publication number: 20180345793
    Abstract: An inverter ECU is applied to a hybrid vehicle having an engine and a motor generator as drive power source and a motor generator control system. A drive control part generates drive signals for an inverter based on torque request to the motor generator. A temperature information acquiring part acquires an element temperature value and a cooling water temperature value as an inverter temperature value. An abnormality detection part detects whether the inverter temperature value is within a diagnosable temperature range, and performs abnormality detection for the motor generator control system when the inverter temperature value is within the diagnosable temperature range. When the inverter temperature value is not placed within the diagnosable temperature range, the energy supplied to the inverter is adjusted to move the inverter temperature value into the diagnosis allowable temperature range to correctly perform the abnormality detection.
    Type: Application
    Filed: May 2, 2018
    Publication date: December 6, 2018
    Applicant: DENSO CORPORATION
    Inventors: Masaki NISHIYAMA, Hirofumi YAMASHITA
  • Patent number: 9806663
    Abstract: A motor-generator control part controls driving of a motor-generator, which is a drive power source of a vehicle. A torque limitation part of the MG control part limits a torque of the motor-generator when an element temperature indicating a system temperature increases to be higher than a limitation starting temperature. The torque limitation part continues the torque limitation, which was performed when the element temperature was at a peak temperature, until a limitation continuation period elapses, when the element temperature changes from increasing to decreasing as a result of limiting the torque of the motor-generator. Thus torque variation is suppressed while also suppressing overheating of a motor-generator driving system.
    Type: Grant
    Filed: August 12, 2016
    Date of Patent: October 31, 2017
    Assignee: DENSO CORPORATION
    Inventors: Xuezhi He, Masaki Nishiyama, Hirofumi Yamashita
  • Publication number: 20170141716
    Abstract: A motor-generator control part controls driving of a motor-generator, which is a drive power source of a vehicle. A torque limitation part of the MG control part limits a torque of the motor-generator when an element temperature indicating a system temperature increases to be higher than a limitation starting temperature. The torque limitation part continues the torque limitation, which was performed when the element temperature was at a peak temperature, until a limitation continuation period elapses, when the element temperature changes from increasing to decreasing as a result of limiting the torque of the motor-generator. Thus torque variation is suppressed while also suppressing overheating of a motor-generator driving system.
    Type: Application
    Filed: August 12, 2016
    Publication date: May 18, 2017
    Applicant: DENSO CORPORATION
    Inventors: Xuezhi HE, Masaki NISHIYAMA, Hirofumi YAMASHITA
  • Patent number: 9365202
    Abstract: When a request of a warming-up of a transmission is generated, a hybrid ECU sets a target input rotational speed of the transmission where a heat loss quantity of a MG becomes maximum, based on a request driving force of a vehicle. In this case, the heat loss quantity is a quantity of a heat loss causing an increasing of a temperature of an ATF in the MG. Thus, the hybrid ECU sets the target input rotational speed where the heat loss quantity becomes maximum and controls the transmission and the MG to output power that meets the request driving force of the vehicle. Since the hybrid ECU controls a torque of the MG, a torque of the engine, and a transmission ratio of the transmission to achieve the target input rotational speed, the hybrid ECU controls the MG, the engine, and the transmission in a condition that the heat loss quantity becomes maximum.
    Type: Grant
    Filed: February 27, 2015
    Date of Patent: June 14, 2016
    Assignee: DENSO CORPORATION
    Inventors: Masaki Nishiyama, Youhei Morimoto, Yutaro Itoh
  • Publication number: 20160121755
    Abstract: A control apparatus is provided in a rotary electric machine driving system that includes a rotary electric machine for a vehicle and a control unit that controls driving of the rotary electric machine. The apparatus includes a malfunction determination section determining whether or not a system malfunction that requires torque limitation has occurred, a to-be-avoided state determination section determining whether or not the vehicle is in a to-be-avoided state, a torque limitation section limiting an output torque outputted from the rotary electric machine to a limiting torque smaller than a command torque, when the system malfunction is determined to have occurred and the vehicle is not in the to-be-avoided state, and a torque limitation relaxation section permitting the output torque to be a limitation relaxation torque larger than the limiting torque, when the system malfunction is determined to have occurred and the vehicle is in the to-be-avoided state.
    Type: Application
    Filed: October 29, 2015
    Publication date: May 5, 2016
    Inventors: Masaki NISHIYAMA, Hirofumi YAMASHITA
  • Publication number: 20150251650
    Abstract: When a request of a warming-up of a transmission is generated, a hybrid ECU sets a target input rotational speed of the transmission where a heat loss quantity of a MG becomes maximum, based on a request driving force of a vehicle. In this case, the heat loss quantity is a quantity of a heat loss causing an increasing of a temperature of an ATF in the MG. Thus, the hybrid ECU sets the target input rotational speed where the heat loss quantity becomes maximum and controls the transmission and the MG to output power that meets the request driving force of the vehicle. Since the hybrid ECU controls a torque of the MG, a torque of the engine, and a transmission ratio of the transmission to achieve the target input rotational speed, the hybrid ECU controls the MG, the engine, and the transmission in a condition that the heat loss quantity becomes maximum.
    Type: Application
    Filed: February 27, 2015
    Publication date: September 10, 2015
    Inventors: Masaki NISHIYAMA, Youhei MORIMOTO, Yutaro ITOH
  • Patent number: 6965955
    Abstract: A peripheral apparatus, a control method for the peripheral apparatus, a memory medium, and an information processing system, in which performance of a connected host computer is not deteriorated are provided. For this purpose, when a status of the apparatus is a first status, a control mode is switched to the first mode such that in response to a data reading request which is issued from the host computer, when response data has been prepared, the response data is notified, and when the response data is not prepared yet, the fact that a response cannot be made is notified, and when the status of the apparatus is not the first status, the control mode is switched to the second mode such that in response to the data reading request which is issued from the host computer, the absence of the data to be responded is notified.
    Type: Grant
    Filed: March 21, 2000
    Date of Patent: November 15, 2005
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masaki Nishiyama
  • Patent number: 5949442
    Abstract: A display device to realize a smooth scroll on a display screen is provided. This device comprises: a memory having a plurality of storage parts which can store information to be displayed which is formed by a plurality of dot lines on a line unit basis; transfer circuit for transferring the information stored in the memory to a video memory on a unit basis of one dot line or a plurality of dot lines less the total contained in the above line unit; a timer for controlling the transfer of the information from the memory to the video memory; display apparatus for displaying the information in the video memory; and a controller for scrolling the information which is displayed on the display screen on the display apparatus.
    Type: Grant
    Filed: March 28, 1994
    Date of Patent: September 7, 1999
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masaki Nishiyama
  • Patent number: 5838886
    Abstract: A printing method and apparatus according to the present invention is capable of instructing whether or not a printing portion is used in a case where data is received from a host so as to be printed, and the initializing control required to perform printing can be skipped at the time of power supply if the printing portion is not used, or arranged to store a fact whether or not initialization has been performed so that whether or not the initialization is performed is controlled at the time of the power supply or when a printing opportunity has been issued.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: November 17, 1998
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tsutomu Takahashi, Susumu Takase, Naohisa Suzuki, Koji Fukunaga, Masaki Nishiyama, Jiro Tateyama, Hisatsugu Naito
  • Patent number: 5787308
    Abstract: In a data transfer method, virtual handshake busy data is transferred to an I/O register when data is transferred through a parallel interface between data processing and printer units connected to the I/O register through a bus and a transfer storage area in the printer unit has an empty area having a predetermined amount or more.
    Type: Grant
    Filed: December 13, 1994
    Date of Patent: July 28, 1998
    Assignee: Canon Kabushiki Kaisa
    Inventors: Naohisa Suzuki, Koji Fukunaga, Masaki Nishiyama, Tsutomu Takahashi, Jiro Tateyama, Jun Oida, Hisatsugu Naito
  • Patent number: 5644684
    Abstract: There is disclosed an output apparatus comprising a storage having a submatrix obtained by means of dividing a character set where one character being formed of bit patterns of M rows by N columns into M1 rows by N1 columns for each character, an indexing submatrix group where different patterns in said submatrix are indexed and aligned, and an indexing number storing area for storing numbers used for looking up the indexing submatrix; and a control unit for making the indexing number storing area have a variable length.
    Type: Grant
    Filed: March 14, 1994
    Date of Patent: July 1, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masaki Nishiyama
  • Patent number: 5604844
    Abstract: For a paper feed operation, it is determined whether printing printing is being performed. When the printing is not performed, the paper feed is enabled even in the on-line state, thereby omitting a vain key operation. Further, a line feed key and a paper discharge key are set as the same key and a paper discharge stop function is provided, thereby enabling the line feed of a large amount to be executed by a smaller number of key strokes.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: February 18, 1997
    Assignee: Canon Kabushiki Kaisha
    Inventor: Masaki Nishiyama
  • Patent number: 5581668
    Abstract: A method and apparatus for processing data, with the data processing side performing main control and the print control side including control for saving power. The print control side performs transition of a plurality of power saving states to obtain an optimal power saving state on the basis of transfer of data from the main control side, and the data processing side performs various control operations independently of the transition of the plurality of power saving states.
    Type: Grant
    Filed: July 27, 1992
    Date of Patent: December 3, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Jun Oida, Naohisa Suzuki, Koji Fukunaga, Masaki Nishiyama, Tsutomu Takahashi, Jiro Tateyama, Hisatsugu Naito