Patents by Inventor Mitsunori Ohta

Mitsunori Ohta 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: 11358477
    Abstract: A magnitude of a road surface slope along which a vehicle travels is detected, when the magnitude of the road surface slope increases, a basic braking force set in advance is corrected to be decreased based on the magnitude of the road surface slope, or a basic driving force set in advance is corrected to be increased based on the magnitude of the road surface slope, when the magnitude of the road surface slope decreases, a basic braking force is corrected to be increased based on the magnitude of the road surface slope or a basic driving force is corrected to be decreased based on the magnitude of the road surface slope, and the corrected braking force or driving force is generated.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: June 14, 2022
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yuuki Shiozawa, Katsuaki Kubotera, Tatsuya Suzuki, Naoki Miyashita, Mitsunori Ohta, Tomoyuki Kashiwaya, Satoshi Ota
  • Patent number: 11021068
    Abstract: A method for controlling a vehicle that includes a motor configured to provide a driving/braking force to the vehicle and a friction braking mechanism configured to provide a friction brake force to the vehicle includes a target calculation step of calculating a target torque of the motor in accordance with a displacement of an accelerator pedal, a gradient estimation step of estimating a gradient torque to cancel a disturbance due to a gradient of a road surface where the vehicle is travelling, a command calculation step of calculating a torque command value of the motor based on the gradient torque and the target torque, a control step of controlling a torque of the motor in accordance with the torque command value, and a stop control step.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: June 1, 2021
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Ikuma Shindo, Tatsuya Suzuki, Mitsunori Ohta
  • Publication number: 20190381895
    Abstract: A method for controlling a vehicle that includes a motor configured to provide a driving/braking force to the vehicle and a friction braking mechanism configured to provide a friction brake force to the vehicle includes a target calculation step of calculating a target torque of the motor in accordance with a displacement of an accelerator pedal, a gradient estimation step of estimating a gradient torque to cancel a disturbance due to a gradient of a road surface where the vehicle is travelling, a command calculation step of calculating a torque command value of the motor based on the gradient torque and the target torque, a control step of controlling a torque of the motor in accordance with the torque command value, and a stop control step.
    Type: Application
    Filed: January 16, 2018
    Publication date: December 19, 2019
    Applicant: Nissan Motor Co., Ltd.
    Inventors: Ikuma Shindo, Tatsuya Suzuki, Mitsunori Ohta
  • Patent number: 10220848
    Abstract: When a driver demand torque is not greater than a target braking/driving torque, the acceleration/deceleration of the vehicle is controlled depending on the target braking/driving torque, when the driver demand torque exceeds the target braking/driving torque, the acceleration/deceleration is controlled depending on the driver demand torque, when the accelerator pedal operation amount decreases after the driver demand torque exceeds the target braking/driving torque, the driver demand torque is decreased depending on the decrease in the accelerator pedal operation amount, the decrease rate of the driver demand torque depending on the decrease in the accelerator pedal operation amount is set to be smaller than the decrease rate for a case where the driver does not set a travelling speed, and the acceleration/deceleration is controlled based on the set driver demand torque, and when the accelerator pedal operation amount becomes zero subsequently, the acceleration/deceleration is controlled depending on the tar
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: March 5, 2019
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Mitsunori Ohta, Naoki Miyashita, Yuuki Shiozawa
  • Publication number: 20180326852
    Abstract: A magnitude of a road surface slope along which a vehicle travels is detected, when the magnitude of the road surface slope increases, a basic braking force set in advance is corrected to be decreased based on the magnitude of the road surface slope, or a basic driving force set in advance is corrected to be increased based on the magnitude of the road surface slope, when the magnitude of the road surface slope decreases, a basic braking force is corrected to be increased based on the magnitude of the road surface slope or a basic driving force is corrected to be decreased based on the magnitude of the road surface slope, and the corrected braking force or driving force is generated.
    Type: Application
    Filed: November 9, 2015
    Publication date: November 15, 2018
    Inventors: Yuuki Shiozawa, Katsuaki Kubotera, Tatsuya Suzuki, Naoki Miyashita, Mitsunori Ohta, Tomoyuki Kashiwaya, Satoshi Ota
  • Publication number: 20180319397
    Abstract: When a driver demand torque is not greater than a target braking/driving torque, the acceleration/deceleration of the vehicle is controlled depending on the target braking/driving torque, when the driver demand torque exceeds the target braking/driving torque, the acceleration/deceleration is controlled depending on the driver demand torque, when the accelerator pedal operation amount decreases after the driver demand torque exceeds the target braking/driving torque, the driver demand torque is decreased depending on the decrease in the accelerator pedal operation amount, the decrease rate of the driver demand torque depending on the decrease in the accelerator pedal operation amount is set to be smaller than the decrease rate for a case where the driver does not set a travelling speed, and the acceleration/deceleration is controlled based on the set driver demand torque, and when the accelerator pedal operation amount becomes zero subsequently, the acceleration/deceleration is controlled depending on the tar
    Type: Application
    Filed: November 9, 2015
    Publication date: November 8, 2018
    Inventors: Mitsunori Ohta, Naoki Miyashita, Yuuki Shiozawa
  • Patent number: 9950697
    Abstract: A braking-driving force control system is provided in which erroneous vehicle speed detection may be avoided even when a frictional braking power is generated during rotation of an output shaft coupled to an electric driving motor as driving source. When only regenerative braking force is being generated as braking force while the vehicle is traveling, the braking force and the driving force are controlled based on an output shaft side vehicle speed calculated from the rotational state of an output shaft of a driving source, and when the frictional braking power is being generated while the vehicle is traveling, the braking force and the driving force will be controlled based on a wheel side vehicle speed representing the vehicle speed calculated from the rotational state of the vehicle wheel.
    Type: Grant
    Filed: December 8, 2014
    Date of Patent: April 24, 2018
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Mitsunori Ohta, Yuuki Shiozawa, Tastuya Suzuki, Satoshi Ota
  • Publication number: 20170240145
    Abstract: A braking-driving force control system is provided in which erroneous vehicle speed detection may be avoided even when a frictional braking power is generated during rotation of an output shaft coupled to an electric driving motor as driving source. When only regenerative braking force is being generated as braking force while the vehicle is traveling, the braking force and the driving force are controlled based on an output shaft side vehicle speed calculated from the rotational state of an output shaft of a driving source, and when the frictional braking power is being generated while the vehicle is traveling, the braking force and the driving force will be controlled based on a wheel side vehicle speed representing the vehicle speed calculated from the rotational state of the vehicle wheel.
    Type: Application
    Filed: December 8, 2014
    Publication date: August 24, 2017
    Inventors: Mitsunori OHTA, Yuuki SHIOZAWA, Tastuya SUZUKI, Satoshi OTA
  • Patent number: 8874314
    Abstract: A vehicle damping control apparatus is basically provided with a braking/accelerating torque generating component, a corrective torque calculating component, a corrective torque command value output component and a priority level setting component. The braking/accelerating torque generating component is configured to generate braking/accelerating torque in a wheel. The corrective torque calculating component is configured to calculate a corrective torque to suppress vehicle pitching vibration and vehicle bouncing vibration. The corrective torque command value output component is configured to output a corrective torque command value to the braking/accelerating torque generating component based on the corrective torque. The priority level setting component is configured to set a priority level for calculating the corrective torque command value such that vehicle bouncing vibration is suppressed with priority over vehicle pitching vibration.
    Type: Grant
    Filed: May 16, 2011
    Date of Patent: October 28, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yosuke Kobayashi, Mitsunori Ohta
  • Patent number: 8818630
    Abstract: A vehicular vibration damping control apparatus calculates a correction torque to suppress vehicle body sprung vibration. In outputting a correction torque command to a driving/braking torque producing device, the control apparatus outputs a hunting time correction torque command smaller than a normal time correction toque command when a state in which amplitude of the correction torque is greater than or equal to a predetermined amplitude continues for a predetermined time length, and thereafter to return an output of the correction torque command from the hunting time correction torque command to the normal time correction torque command if a state in which the amplitude of the correction torque is smaller than or equal to the predetermined amplitude continues for a first predetermined time length. The frequency of performing the vibration damping control is increased by suppressing occurrence of hunting at the time of return to the normal vibration damping control.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: August 26, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yosuke Kobayashi, Takeshi Kimura, Yuuki Shiozawa, Mitsunori Ohta, Hiroki Sasaki, Akihiro Itoh, Masahiko Yoshizawa
  • Patent number: 8788148
    Abstract: Risk and/or control status are presented in such a way that the vehicle driver can easily comprehend the fact. Upon detecting risk during driving a vehicle, the vehicle is controlled and information of at least one of the risk and the status of the vehicle being controlled is presented in visual form. In addition, the driver's initiative (D) in driving the vehicle is calculated (step S2), and the visual form, in which the information is presented, is altered depending on the calculated driver's initiative (step S3). When, for example, a lane departure prevention control works, the status of restraining lane departure is presented by arrow(s) in an anti-lane-departure direction opposite to the direction of lane departure. The size (including the length and the width) and color of the arrow(s) are altered depending on the initiative (D).
    Type: Grant
    Filed: April 9, 2010
    Date of Patent: July 22, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Mitsunori Ohta, Takeshi Kimura, Taku Suzuki
  • Patent number: 8688342
    Abstract: Predetermined weights are assigned, in accordance with a traveling state, to a first correction toque to suppress a sprung vibration of the vehicle in accordance with a wheel speed, and a second correction toque to suppress the sprung vibration of the vehicle in accordance with a driving/braking torque. With this configuration, it becomes possible to calculate the vibration suppressing torque corresponding to the traveling state.
    Type: Grant
    Filed: May 26, 2011
    Date of Patent: April 1, 2014
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Mitsunori Ohta, Masahiko Yoshizawa, Yuuki Shiozawa, Yosuke Kobayashi, Akihiro Itoh
  • Patent number: 8620524
    Abstract: A correction torque command is outputted to a driving/braking torque producing means in accordance with a correction torque to suppress vehicle body spring vibration. When a state of the correction torque amplitude being greater than a predetermined amplitude continues for a given predetermined time, a control apparatus outputs a hunting time correction torque command smaller than a normal time correction toque command. When a state of the correction torque amplitude being smaller than or equal to the predetermined amplitude continues for a first predetermined time, the control apparatus returns the output of correction torque command from the hunting time correction torque command to the normal time correction torque command. The control apparatus continues the output of the hunting time correction torque command if the state in which the correction torque amplitude exceeds the predetermined amplitude continues for the given predetermined time, before the expiration of the first time period.
    Type: Grant
    Filed: May 9, 2011
    Date of Patent: December 31, 2013
    Assignee: Nissan Motor Co., Ltd.
    Inventors: Yosuke Kobayashi, Takeshi Kimura, Yuuki Shiozawa, Mitsunori Ohta, Hiroki Sasaki, Akihiro Itoh, Masahiko Yoshizawa
  • Publication number: 20130090826
    Abstract: Predetermined weights are assigned, in accordance with a traveling state, to a first correction toque to suppress a sprung vibration of the vehicle in accordance with a wheel speed, and a second correction toque to suppress the sprung vibration of the vehicle in accordance with a driving/braking torque. With this configuration, it becomes possible to calculate the vibration suppressing torque corresponding to the traveling state.
    Type: Application
    Filed: May 26, 2011
    Publication date: April 11, 2013
    Inventors: Mitsunori Ohta, Masahiko Yoshizawa, Yuuki Shiozawa, Yosuke Kobayashi, Akihiro Itoh
  • Publication number: 20130080013
    Abstract: A vehicle damping control apparatus is basically provided with a braking/accelerating torque generating component, a corrective torque calculating component, a corrective torque command value output component and a priority level setting component. The braking/accelerating torque generating component is configured to generate braking/accelerating torque in a wheel. The corrective torque calculating component is configured to calculate a corrective torque to suppress vehicle pitching vibration and vehicle bouncing vibration. The corrective torque command value output component is configured to output a corrective torque command value to the braking/accelerating torque generating component based on the corrective torque. The priority level setting component is configured to set a priority level for calculating the corrective torque command value such that vehicle bouncing vibration is suppressed with priority over vehicle pitching vibration.
    Type: Application
    Filed: May 16, 2011
    Publication date: March 28, 2013
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Yosuke Kobayashi, Mitsunori Ohta
  • Publication number: 20130080012
    Abstract: A vehicular vibration damping control apparatus calculates a correction torque to suppress vehicle body sprung vibration. In outputting a correction torque command to a driving/braking torque producing device, the control apparatus outputs a hunting time correction torque command smaller than a normal time correction toque command when a state in which amplitude of the correction torque is greater than or equal to a predetermined amplitude continues for a predetermined time length, and thereafter to return an output of the correction torque command from the hunting time correction torque command to the normal time correction torque command if a state in which the amplitude of the correction torque is smaller than or equal to the predetermined amplitude continues for a first predetermined time length. The frequency of performing the vibration damping control is increased by suppressing occurrence of hunting at the time of return to the normal vibration damping control.
    Type: Application
    Filed: April 20, 2011
    Publication date: March 28, 2013
    Inventors: Yosuke Kobayashi, Takeshi Kimura, Yuuki Shiozawa, Mitsunori Ohta, Hiroki Sasaki, Akihiro Itoh, Masahiko Yoshizawa
  • Publication number: 20130073145
    Abstract: A correction torque command is outputted to a driving/braking torque producing means in accordance with a correction torque to suppress vehicle body sprung vibration. When a state of the correction torque amplitude being greater than or equal to a predetermined amplitude continues for a predetermined time, a control apparatus outputs a hunting time correction torque command smaller than a normal time correction toque command. When a state of the correction torque amplitude being smaller than or equal to the predetermined amplitude continues for a first predetermined time, the control apparatus returns the output of correction torque command from the hunting time correction torque command to the normal time correction torque command. The control apparatus continues the output of the hunting time correction torque command if the state in which the correction torque amplitude exceeds the predetermined amplitude continues for the predetermined time, before the expiration of the first time period.
    Type: Application
    Filed: May 9, 2011
    Publication date: March 21, 2013
    Inventors: Yosuke Kobayashi, Takeshi Kimura, Yuuki Shiozawa, Mitsunori Ohta, Hiroki Sasaki, Akihiro Itoh, Masahiko Yoshizawa
  • Publication number: 20120072097
    Abstract: Risk and/or control status are presented in such a way that the vehicle driver can easily comprehend the fact. Upon detecting risk during driving a vehicle, the vehicle is controlled and information of at least one of the risk and the status of the vehicle being controlled is presented in visual form. In addition, the driver's initiative (D) in driving the vehicle is calculated (step S2), and the visual form, in which the information is presented, is altered depending on the calculated driver's initiative (step S3). When, for example, a lane departure prevention control works, the status of restraining lane departure is presented by arrow(s) in an anti-lane-departure direction opposite to the direction of lane departure. The size (including the length and the width) and color of the arrow(s) are altered depending on the initiative (D).
    Type: Application
    Filed: April 9, 2010
    Publication date: March 22, 2012
    Applicant: NISSAN MOTOR CO., LTD.
    Inventors: Mitsunori Ohta, Takeshi Kimura, Taku Suzuki
  • Patent number: 4120577
    Abstract: A color transfer copying process for forming a colored image corresponding to an original by repeating prescribed times the procedures of projecting a reflected ray image from the original to be copied on a photosensitive material uniformly charged by a charging electrode through a filter to form an electrostatic latent image on the photosensitive material, converting the latent image to a toner image by using a powdery developer containing a coloring toner and transferring electrostatically the toner image onto a transfer sheet, while using selectively blue, green and red filters.
    Type: Grant
    Filed: June 16, 1977
    Date of Patent: October 17, 1978
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Koji Watanabe, Mitsunori Ohta, Makoto Tomono
  • Patent number: 4107062
    Abstract: According to the present invention, there is provided a toner for developing electrostatic latent images, which includes a colorant, an amine-addition resin and, if desired, the resin miscible with the amine-addition resin. The above mentioned amine-addition resin is further obtained by interacting an epoxy group-containing resin and an aliphatic primary or secondary amine.
    Type: Grant
    Filed: January 4, 1977
    Date of Patent: August 15, 1978
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Makoto Tomono, Goichi Yamakawa, Mitsunori Ohta