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).
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Patent number: 11345323Abstract: 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: GrantFiled: June 24, 2020Date of Patent: May 31, 2022Assignee: HONDA MOTOR CO., LTD.Inventors: Shinya Kobayashi, Dai Saitoh
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Publication number: 20200398804Abstract: 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: ApplicationFiled: June 24, 2020Publication date: December 24, 2020Inventors: Shinya KOBAYASHI, Dai SAITOH
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Patent number: 9199544Abstract: 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: GrantFiled: October 30, 2012Date of Patent: December 1, 2015Assignee: HONDA MOTOR CO., LTD.Inventors: Shinya Kobayashi, Dai Saitoh
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Patent number: 9139106Abstract: 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: GrantFiled: November 15, 2012Date of Patent: September 22, 2015Assignee: HONDA MOTOR CO., LTD.Inventors: Dai Saitoh, Masanobu Asakawa, Yasuo Miyoshi
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Publication number: 20140350759Abstract: 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: ApplicationFiled: October 30, 2012Publication date: November 27, 2014Inventors: Shinya Kobayashi, Dai Saitoh
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Patent number: 8897945Abstract: 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: GrantFiled: July 24, 2012Date of Patent: November 25, 2014Assignee: Honda Motor Co., Ltd.Inventors: Shinya Kobayashi, Dai Saitoh
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Publication number: 20140336860Abstract: 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: ApplicationFiled: November 15, 2012Publication date: November 13, 2014Applicant: HONDA MOTOR cO., LTD,Inventors: Dai Saitoh, Masanobu Asakawa, Yasuo MIyoshi
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Publication number: 20140195083Abstract: 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: ApplicationFiled: July 24, 2012Publication date: July 10, 2014Applicant: HONDA MOTOR CO., LTD.Inventors: Shinya Kobayashi, Dai Saitoh
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Patent number: 8342275Abstract: 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: GrantFiled: May 13, 2008Date of Patent: January 1, 2013Assignee: Honda Motor Co., Ltd.Inventors: Kuniaki Ojima, Yoshikazu Murakami, Dai Saitoh
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Patent number: 8078348Abstract: 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: GrantFiled: October 23, 2008Date of Patent: December 13, 2011Assignee: Honda Motor Co., Ltd.Inventors: Dai Saitoh, Kazunori Watanabe, Kenichiro Kimura, Kazuo Kotaka, Yoshikazu Murakami
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Patent number: 7994748Abstract: 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: GrantFiled: June 4, 2008Date of Patent: August 9, 2011Assignee: Honda Motor Co., Ltd.Inventors: Kazunori Watanabe, Dai Saitoh, Hisayoshi Takahashi, Kazuo Kotaka
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Patent number: 7776480Abstract: 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: GrantFiled: September 12, 2006Date of Patent: August 17, 2010Assignee: Honda Motor Co., Ltd.Inventors: Yuji Matsumoto, Kenichiro Ueda, Dai Saitoh
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Patent number: 7618728Abstract: 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: GrantFiled: November 2, 2005Date of Patent: November 17, 2009Assignee: Honda Motor Co., Ltd.Inventors: Daishi Igarashi, Yoshikazu Murakami, Junji Uehara, Kenichiro Ueda, Dai Saitoh, Chihiro Wake
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Publication number: 20090112386Abstract: 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: ApplicationFiled: October 23, 2008Publication date: April 30, 2009Applicant: Honda Motor Co., Ltd.Inventors: Dai Saitoh, Kazunori Watanabe, Kenichiro Kimura, Kazuo Kotaka, Yoshikazu Murakami
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Publication number: 20080303465Abstract: 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: ApplicationFiled: June 4, 2008Publication date: December 11, 2008Applicant: HONDA MOTOR CO., LTD.Inventors: Kazunori Watanabe, Dai Saitoh, Hisayoshi Takahashi, Kazuo Kotaka
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Publication number: 20080283313Abstract: 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: ApplicationFiled: May 13, 2008Publication date: November 20, 2008Applicant: Honda Motor Co., Ltd.Inventors: Kuniaki Ojima, Yoshikazu Murakami, Dai Saitoh
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Patent number: 7344795Abstract: 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: GrantFiled: March 23, 2005Date of Patent: March 18, 2008Assignee: Honda Motor Co., Ltd.Inventors: Dai Saitoh, Yoshikazu Murakami, Kenichiro Kimura
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Publication number: 20070059569Abstract: 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: ApplicationFiled: September 12, 2006Publication date: March 15, 2007Applicant: Honda Motor Co., Ltd.Inventors: Yuji Matsumoto, Kenichiro Ueda, Dai Saitoh
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Publication number: 20060093880Abstract: 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: ApplicationFiled: November 2, 2005Publication date: May 4, 2006Applicant: Honda Motor Co., Ltd.Inventors: Daishi Igarashi, Yoshikazu Murakami, Junji Uehara, Kenichiro Ueda, Dai Saitoh, Chihiro Wake
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Publication number: 20050214605Abstract: 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: ApplicationFiled: March 23, 2005Publication date: September 29, 2005Applicant: Honda Motor Co., Ltd.Inventors: Dai Saitoh, Yoshikazu Murakami, Kenichiro Kimura