Patents by Inventor Dai Saitoh

Dai Saitoh 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: 11345323
    Abstract: A vehicle deceleration controller includes: a brake pedal; an accelerator pedal which is operated when an acceleration/deceleration request of a vehicle is inputted; a target acceleration/deceleration setting part configured to set a target deceleration based on a deceleration operation of the accelerator pedal; and an acceleration/deceleration control part configured to, when the accelerator pedal is operated to decelerate the vehicle, provide deceleration control over the vehicle such that an actual deceleration follows the target deceleration set by the target acceleration/deceleration setting part.
    Type: Grant
    Filed: June 24, 2020
    Date of Patent: May 31, 2022
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Shinya Kobayashi, Dai Saitoh
  • Publication number: 20200398804
    Abstract: A vehicle deceleration controller includes: a brake pedal; an accelerator pedal which is operated when an acceleration/deceleration request of a vehicle is inputted; a target acceleration/deceleration setting part configured to set a target deceleration based on a deceleration operation of the accelerator pedal; and an acceleration/deceleration control part configured to, when the accelerator pedal is operated to decelerate the vehicle, provide deceleration control over the vehicle such that an actual deceleration follows the target deceleration set by the target acceleration/deceleration setting part.
    Type: Application
    Filed: June 24, 2020
    Publication date: December 24, 2020
    Inventors: Shinya KOBAYASHI, Dai SAITOH
  • Patent number: 9199544
    Abstract: Provided is a method of controlling an electric vehicle capable of preferably performing a regenerative control when a plurality of forward driving ranges are shifted to each other. During travelling on a downhill road, an electric vehicle executes a downhill regenerative control for adjusting the regenerative amount of an electric motor so that acceleration obtained when an accelerator is closed becomes a downhill acceleration according to a road surface slope. The downhill acceleration obtained when a second forward driving range is selected, in which the deceleration of the electric vehicle becomes larger than that in a first forward driving range, is smaller over the entire range of the set road surface slope than the downhill acceleration obtained when the first forward driving range is selected.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: December 1, 2015
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Shinya Kobayashi, Dai Saitoh
  • Patent number: 9139106
    Abstract: Provided is a method of controlling an electric vehicle capable of preferably performing a regenerative control when a plurality of forward driving ranges are shifted to each other. During travelling on a downhill road, the vehicle executes a downhill regenerative control for adjusting the regenerative amount of an electric motor so that acceleration obtained when an accelerator is closed becomes a downhill acceleration according to a road surface slope. The vehicle also executes an acceleration increase control in which the downhill acceleration obtained when the forward driving ranges are shifted from a second forward driving range to a first forward driving range during travelling on the downhill road is at least temporarily set to an acceleration exceeding the downhill acceleration obtained on the assumption that the vehicle continuously travels on the same road surface slope as that of the currently travelling downhill road in the first forward driving range.
    Type: Grant
    Filed: November 15, 2012
    Date of Patent: September 22, 2015
    Assignee: HONDA MOTOR CO., LTD.
    Inventors: Dai Saitoh, Masanobu Asakawa, Yasuo Miyoshi
  • Publication number: 20140350759
    Abstract: Provided is a method of controlling an electric vehicle capable of preferably performing a regenerative control when a plurality of forward driving ranges are shifted to each other. During travelling on a downhill road, an electric vehicle executes a downhill regenerative control for adjusting the regenerative amount of an electric motor so that acceleration obtained when an accelerator is closed becomes a downhill acceleration according to a road surface slope. The downhill acceleration obtained when a second forward driving range is selected, in which the deceleration of the electric vehicle becomes larger than that in a first forward driving range, is smaller over the entire range of the set road surface slope than the downhill acceleration obtained when the first forward driving range is selected.
    Type: Application
    Filed: October 30, 2012
    Publication date: November 27, 2014
    Inventors: Shinya Kobayashi, Dai Saitoh
  • Patent number: 8897945
    Abstract: This electromotive-vehicular motor control apparatus includes: a motor; a power drive unit; a torque control unit that controls an output torque of the motor; an electric current control unit; a number-of-revolutions detection unit; a target number-of-revolutions setting unit; a number-of-revolutions deviation calculation unit; and a removal unit that outputs a signal of a second number-of-revolutions deviation, in which the torque control unit controls the output torque based on the second number-of-revolutions deviation that has been output from the removal unit.
    Type: Grant
    Filed: July 24, 2012
    Date of Patent: November 25, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Shinya Kobayashi, Dai Saitoh
  • Publication number: 20140336860
    Abstract: Provided is a method of controlling an electric vehicle capable of preferably performing a regenerative control when a plurality of forward driving ranges are shifted to each other. During travelling on a downhill road, the vehicle executes a downhill regenerative control for adjusting the regenerative amount of an electric motor so that acceleration obtained when an accelerator is closed becomes a downhill acceleration according to a road surface slope. The vehicle also executes an acceleration increase control in which the downhill acceleration obtained when the forward driving ranges are shifted from a second forward driving range to a first forward driving range during travelling on the downhill road is at least temporarily set to an acceleration exceeding the downhill acceleration obtained on the assumption that the vehicle continuously travels on the same road surface slope as that of the currently travelling downhill road in the first forward driving range.
    Type: Application
    Filed: November 15, 2012
    Publication date: November 13, 2014
    Applicant: HONDA MOTOR cO., LTD,
    Inventors: Dai Saitoh, Masanobu Asakawa, Yasuo MIyoshi
  • Publication number: 20140195083
    Abstract: This electromotive-vehicular motor control apparatus includes: a motor; a power drive unit; a torque control unit that controls an output torque of the motor; an electric current control unit; a number-of-revolutions detection unit; a target number-of-revolutions setting unit; a number-of-revolutions deviation calculation unit; and a removal unit that outputs a signal of a second number-of-revolutions deviation, in which the torque control unit controls the output torque based on the second number-of-revolutions deviation that has been output from the removal unit.
    Type: Application
    Filed: July 24, 2012
    Publication date: July 10, 2014
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Shinya Kobayashi, Dai Saitoh
  • Patent number: 8342275
    Abstract: A fuel cell vehicle is provided that can suppress uneven torque. The fuel cell vehicle 1 includes a motor 4; a fuel cell 10; a battery 3; a battery drive unit 21 for driving the motor 4 using electricity from the battery 3 so as to serve as an battery drive mode, in which case the initialization of the fuel cell 10 to generate electricity is not complete; a fuel cell drive unit 22 for driving the motor 4 using electricity from the fuel cell 10 and battery 3 so as to serve as a fuel cell drive mode, in which case the initialization of the fuel cell 10 to generate electricity is complete; and a torque upper limit control unit 23 for controlling a torque upper limit value of the motor 4 under the battery drive mode and fuel cell drive mode.
    Type: Grant
    Filed: May 13, 2008
    Date of Patent: January 1, 2013
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kuniaki Ojima, Yoshikazu Murakami, Dai Saitoh
  • Patent number: 8078348
    Abstract: An electric vehicle includes a device which determines, on the basis of the gradient of a road surface, a target acceleration of the vehicle in the case where the operational states of an accelerator (gas) pedal and a brake pedal of the vehicle are an OFF state when the vehicle is traveling on a down-slope road, a device which determines the correction amount of a regenerative torque for bringing the actual acceleration of the vehicle close to the target acceleration, a device which determines a basic target torque of an electric motor, which becomes a regenerative torque when the operational state of the accelerator (gas) pedal is the OFF state, on the basis of the operational state of the accelerator (gas) pedal, and a device which determines a target torque by correcting the basic target torque on the basis of at least the aforesaid correction amount. The output torque of the electric motor is controlled to the determined target torque.
    Type: Grant
    Filed: October 23, 2008
    Date of Patent: December 13, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Dai Saitoh, Kazunori Watanabe, Kenichiro Kimura, Kazuo Kotaka, Yoshikazu Murakami
  • Patent number: 7994748
    Abstract: The object of the present invention is provide a drive control system of an electric vehicle that can prevent overshoot of the amount of slip. The drive control system of the electric vehicle includes: a motor to drive a driving wheel; a PDU; a number-of-revolution sensor that detects the number of revolutions of the motor; a grip number of revolutions calculating device for calculating the current grip number of revolutions of the motor; a motor power limiting value calculating portion and a conversion portion that determines the limiting torque value of the motor; and a driving torque determining portion that determines the driving torque of the motor.
    Type: Grant
    Filed: June 4, 2008
    Date of Patent: August 9, 2011
    Assignee: Honda Motor Co., Ltd.
    Inventors: Kazunori Watanabe, Dai Saitoh, Hisayoshi Takahashi, Kazuo Kotaka
  • Patent number: 7776480
    Abstract: A fuel cell system is provided which includes a fuel cell to which fuel gas and oxidizing gas are supplied to generate electricity, a purge valve which purges fuel gas discharged from the fuel cell, a dilutor which mixes the purged fuel gas with the oxidizing gas and purges the purged fuel gas mixed with the oxidizing gas into the atmosphere, and an ECU which stops supply of the oxidizing gas to the fuel cell so as to cause an idle stop and determines whether to permit the idle stop depending on a concentration of the fuel gas in the dilutor.
    Type: Grant
    Filed: September 12, 2006
    Date of Patent: August 17, 2010
    Assignee: Honda Motor Co., Ltd.
    Inventors: Yuji Matsumoto, Kenichiro Ueda, Dai Saitoh
  • Patent number: 7618728
    Abstract: A fuel cell system and an idle stop controlling method for the fuel cell system. The fuel cell system includes: a fuel gas supply means for supplying fuel gas; an oxidant gas supply means for supplying oxidant gas; a fuel cell to which the fuel gas and the oxidant gas are supplied for generation of electricity; an idle stop means for stopping generation of electricity by the fuel cell to perform idle stop; and an unstable state detection means for detecting whether the generation of electricity by the fuel cell is unstable. If the unstable state detection means detects that generation of electricity by the fuel cell is unstable, idle stop by the idle stop means is prohibited so that the fuel cell continues to generate electricity.
    Type: Grant
    Filed: November 2, 2005
    Date of Patent: November 17, 2009
    Assignee: Honda Motor Co., Ltd.
    Inventors: Daishi Igarashi, Yoshikazu Murakami, Junji Uehara, Kenichiro Ueda, Dai Saitoh, Chihiro Wake
  • Publication number: 20090112386
    Abstract: An electric vehicle includes a device which determines, on the basis of the gradient of a road surface, a target acceleration of the vehicle in the case where the operational states of an accelerator (gas) pedal and a brake pedal of the vehicle are an OFF state when the vehicle is traveling on a down-slope road, a device which determines the correction amount of a regenerative torque for bringing the actual acceleration of the vehicle close to the target acceleration, a device which determines a basic target torque of an electric motor, which becomes a regenerative torque when the operational state of the accelerator (gas) pedal is the OFF state, on the basis of the operational state of the accelerator (gas) pedal, and a device which determines a target torque by correcting the basic target torque on the basis of at least the aforesaid correction amount. The output torque of the electric motor is controlled to the determined target torque.
    Type: Application
    Filed: October 23, 2008
    Publication date: April 30, 2009
    Applicant: Honda Motor Co., Ltd.
    Inventors: Dai Saitoh, Kazunori Watanabe, Kenichiro Kimura, Kazuo Kotaka, Yoshikazu Murakami
  • Publication number: 20080303465
    Abstract: The object of the present invention is to provide a drive control system of an electric vehicle that can prevent overshoot of the amount of slip. The drive control system of the electric vehicle includes: a motor to drive a driving wheel; a PDU; a number-of-revolution sensor that detects the number of revolutions of the motor; a grip number of revolutions calculating means 52 for calculating the current grip number of revolutions of the motor; a motor power limiting value calculating portion 53 and a conversion portion 57 that determines the limiting torque value of the motor; and a driving torque determining portion 56 that determines the driving torque of the motor.
    Type: Application
    Filed: June 4, 2008
    Publication date: December 11, 2008
    Applicant: HONDA MOTOR CO., LTD.
    Inventors: Kazunori Watanabe, Dai Saitoh, Hisayoshi Takahashi, Kazuo Kotaka
  • Publication number: 20080283313
    Abstract: A fuel cell vehicle is provided that can suppress uneven torque. The fuel cell vehicle 1 includes a motor 4; a fuel cell 10; a battery 3; a battery drive unit 21 for driving the motor 4 using electricity from the battery 3 so as to serve as an battery drive mode, in which case the initialization of the fuel cell 10 to generate electricity is not complete; a fuel cell drive unit 22 for driving the motor 4 using electricity from the fuel cell 10 and battery 3 so as to serve as a fuel cell drive mode, in which case the initialization of the fuel cell 10 to generate electricity is complete; and a torque upper limit control unit 23 for controlling a torque upper limit value of the motor 4 under the battery drive mode and fuel cell drive mode.
    Type: Application
    Filed: May 13, 2008
    Publication date: November 20, 2008
    Applicant: Honda Motor Co., Ltd.
    Inventors: Kuniaki Ojima, Yoshikazu Murakami, Dai Saitoh
  • Patent number: 7344795
    Abstract: A fuel cell system has a fuel cell, a gas supply device and an electronic control unit. The gas supply device supplies a scavenging gas to the fuel cell. The electronic control unit controls scavenging of the fuel cell with the scavenging gas when a request for discontinuing power generation is given to the fuel cell. A humidification control device for controlling humidification of the scavenging gas and a cooling control device for controlling cooling of the scavenging gas are provided in a passage connecting the gas supply device and the fuel cell.
    Type: Grant
    Filed: March 23, 2005
    Date of Patent: March 18, 2008
    Assignee: Honda Motor Co., Ltd.
    Inventors: Dai Saitoh, Yoshikazu Murakami, Kenichiro Kimura
  • Publication number: 20070059569
    Abstract: A fuel cell system is provided which includes a fuel cell to which fuel gas and oxidizing gas are supplied to generate electricity, a purge valve which purges fuel gas discharged from the fuel cell, a dilutor which mixes the purged fuel gas with the oxidizing gas and purges the purged fuel gas mixed with the oxidizing gas into the atmosphere, and an ECU which stops supply of the oxidizing gas to the fuel cell so as to cause an idle stop and determines whether to permit the idle stop depending on a concentration of the fuel gas in the dilutor.
    Type: Application
    Filed: September 12, 2006
    Publication date: March 15, 2007
    Applicant: Honda Motor Co., Ltd.
    Inventors: Yuji Matsumoto, Kenichiro Ueda, Dai Saitoh
  • Publication number: 20060093880
    Abstract: A fuel cell system and an idle stop controlling method for the fuel cell system. The fuel cell system includes: a fuel gas supply means for supplying fuel gas; an oxidant gas supply means for supplying oxidant gas; a fuel cell to which the fuel gas and the oxidant gas are supplied for generation of electricity; an idle stop means for stopping generation of electricity by the fuel cell to perform idle stop; and an unstable state detection means for detecting whether the generation of electricity by the fuel cell is unstable. If the unstable state detection means detects that generation of electricity by the fuel cell is unstable, idle stop by the idle stop means is prohibited so that the fuel cell continues to generate electricity.
    Type: Application
    Filed: November 2, 2005
    Publication date: May 4, 2006
    Applicant: Honda Motor Co., Ltd.
    Inventors: Daishi Igarashi, Yoshikazu Murakami, Junji Uehara, Kenichiro Ueda, Dai Saitoh, Chihiro Wake
  • Publication number: 20050214605
    Abstract: A fuel cell system has a fuel cell, a gas supply device and an electronic control unit. The gas supply device supplies a scavenging gas to the fuel cell. The electronic control unit controls scavenging of the fuel cell with the scavenging gas when a request for discontinuing power generation is given to the fuel cell. A humidification control device for controlling humidification of the scavenging gas and a cooling control device for controlling cooling of the scavenging gas are provided in a passage connecting the gas supply device and the fuel cell.
    Type: Application
    Filed: March 23, 2005
    Publication date: September 29, 2005
    Applicant: Honda Motor Co., Ltd.
    Inventors: Dai Saitoh, Yoshikazu Murakami, Kenichiro Kimura