Patents by Inventor Naoyuki Mimatsu
Naoyuki Mimatsu 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: 10668918Abstract: Provided is a control device for a vehicle. A control device for a vehicle includes a vehicle that includes an engine and a main motor, and a transmission equipped with first and second input shafts which are respectively connected to the engine via first and second clutches, an output shaft through which power is output to drive wheels, first and second transmission mechanisms which respectively includes a plurality of transmission gears selectively joined to the first and second input shaft respectively, and an ECU. When the main motor is driven and when the engine is stopped, the ECU determines that the vehicle travels using power of the engine using the transmission gears of one of transmission mechanisms in a case where defective engagement release occurs such that a transmission gear of the other transmission mechanism is not disengaged.Type: GrantFiled: May 15, 2018Date of Patent: June 2, 2020Assignee: Honda Motor Co., Ltd.Inventors: Hideaki Iwashita, Naoyuki Mimatsu
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Patent number: 10525971Abstract: A control device in a hybrid vehicle in which control is performed so that the hybrid vehicle can travel using only one shift mechanism from two shift mechanisms is provided. The control device in the hybrid vehicle includes: a transmission including: a first input shaft connected to a motor and optionally connected to an engine; a second input shaft optionally connected to the engine; an output shaft configured to output to power to drive wheels; a first shift mechanism including a plurality of shift gears optionally coupled to the first input shaft; and a second shift mechanism including a plurality of other shift gears optionally coupled to the second input shaft; and an electronic control unit (ECU), wherein the ECU starts the engine with the first input shaft using the motor if none of the shift gears in the first shift mechanism is engaged when the engine is not operating.Type: GrantFiled: September 1, 2017Date of Patent: January 7, 2020Assignee: Honda Motor Co., Ltd.Inventors: Hideaki Iwashita, Naoyuki Mimatsu, Kazuhiko Kitano
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Publication number: 20180354500Abstract: Provided is a control device for a vehicle. A control device for a vehicle includes a vehicle that includes an engine and a main motor, and a transmission equipped with first and second input shafts which are respectively connected to the engine via first and second clutches, an output shaft through which power is output to drive wheels, first and second transmission mechanisms which respectively includes a plurality of transmission gears selectively joined to the first and second input shaft respectively, and an ECU. When the main motor is driven and when the engine is stopped, the ECU determines that the vehicle travels using power of the engine using the transmission gears of one of transmission mechanisms in a case where defective engagement release occurs such that a transmission gear of the other transmission mechanism is not disengaged.Type: ApplicationFiled: May 15, 2018Publication date: December 13, 2018Applicant: Honda Motor Co.,Ltd.Inventors: Hideaki IWASHITA, Naoyuki MIMATSU
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Publication number: 20180072309Abstract: A control device in a hybrid vehicle in which control is performed so that the hybrid vehicle can travel using only one shift mechanism from two shift mechanisms is provided. The control device in the hybrid vehicle includes: a transmission including: a first input shaft connected to a motor and optionally connected to an engine; a second input shaft optionally connected to the engine; an output shaft configured to output to power to drive wheels; a first shift mechanism including a plurality of shift gears optionally coupled to the first input shaft; and a second shift mechanism including a plurality of other shift gears optionally coupled to the second input shaft; and an electronic control unit (ECU), wherein the ECU starts the engine with the first input shaft using the motor if none of the shift gears in the first shift mechanism is engaged when the engine is not operating.Type: ApplicationFiled: September 1, 2017Publication date: March 15, 2018Applicant: Honda Motor Co.,Ltd.Inventors: Hideaki IWASHITA, Naoyuki MIMATSU, Kazuhiko KITANO
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Patent number: 8492922Abstract: The two ends of a battery circuit (18), in which a first power supply (11) is connected in series to a second power supply (12), are connected to the respective first and third lines (L1 and L3), while a junction (18a) between the first power supply (11) and the second power supply (12) is connected to a second line (L2). The two ends of a switching circuit (33) are connected to the respective first and third lines (L1 and L3). An end of a reactor (34) is connected to a junction between first and second switching elements (31 and 32), while the other end of the reactor (34) is connected to the second line (L2). The power supply apparatus (10), when activated, executes an operation in which, while the ON state of the first switching element (31) is inhibited, only the second switching element (32) is alternately turned ON and OFF with the ON state duration changed such that the ON state duration has a tendency to become longer.Type: GrantFiled: November 1, 2010Date of Patent: July 23, 2013Assignee: Honda Motor Co., Ltd.Inventors: Naoyuki Mimatsu, Toshihiro Sone
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Publication number: 20130038120Abstract: The two ends of a battery circuit (18), in which a first power supply (11) is connected in series to a second power supply (12), are connected to the respective first and third lines (L1 and L3), while a junction (18a) between the first power supply (11) and the second power supply (12) is connected to a second line (L2). The two ends of a switching circuit (33) are connected to the respective first and third lines (L1 and L3). An end of a reactor (34) is connected to a junction between first and second switching elements (31 and 32), while the other end of the reactor (34) is connected to the second line (L2). The power supply apparatus (10), when activated, executes an operation in which, while the ON state of the first switching element (31) is inhibited, only the second switching element (32) is alternately turned ON and OFF with the ON state duration changed such that the ON state duration has a tendency to become longer.Type: ApplicationFiled: November 1, 2010Publication date: February 14, 2013Applicant: Honda Motor Co., Ltd.,Inventors: Naoyuki Mimatsu, Toshihiro Sone
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Patent number: 8222763Abstract: If a lower arm device connection period is non-zero in a previous switching cycle, a first dead time is prohibited from decreasing, and if the lower arm device connection period is zero, the first dead time is allowed to decrease, wherein the first dead time is the dead time provided after the lower arm device connection period in the previous switching cycle but before an upper arm device connection period in the current switching cycle.Type: GrantFiled: January 15, 2009Date of Patent: July 17, 2012Assignee: Honda Motor Co., Ltd.Inventors: Naoyuki Mimatsu, Yasushi Kojima, Yutaka Asano
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Patent number: 8154152Abstract: A triangular-wave current flows through a reactor of a DC/DC converter for converting voltages between increased and reduced levels. Surges are reduced, which are developed in an output voltage serving as a control voltage when the triangular-wave current changes across a zero value at which the current direction is changed. When a primary current flowing through the reactor changes across 0 [A] (zero value) at which the direction is changed, within an adjustment range, a feedback coefficient by which to multiply the error between the control voltage and a target voltage is multiplied by k (k>1) so as to increase a feedback amount. Surges developed in the control voltage due to a dead time when the primary current changes across 0 [A] are reduced.Type: GrantFiled: May 19, 2009Date of Patent: April 10, 2012Assignee: Honda Motor Co., Ltd.Inventors: Yasushi Kojima, Naoyuki Mimatsu, Seigo Murashige
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Patent number: 8044534Abstract: When a DC/DC converter switches between a primary voltage control mode, a secondary voltage control mode, and a current limiting mode as operation modes, an I-term resetting processor outputs an I term depending on the duty ratio in the operation mode before being switched to a PID processor. The PID processor performs a PID control process based on the input I term. A drive duty ratio setter outputs a drive duty ratio immediately after the control mode switching, which is substantially equal to the duty ratio in the operation mode before being switched. As a result, the duty ratios in the operation mode before being switched and the operation mode after being switched are made continuous with respect to each other.Type: GrantFiled: February 25, 2009Date of Patent: October 25, 2011Assignee: Honda Motor Co., Ltd.Inventors: Yasushi Kojima, Naoyuki Mimatsu, Seigo Murashige, Yutaka Asano
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Patent number: 7969039Abstract: A controller is capable of executing direct couple control that directly couples a first power device and a second power device without causing a DC/DC converter to convert voltage. During the direct couple control, a drive signal that causes no voltage conversion is intermittently output to at least one of a plurality of switching devices.Type: GrantFiled: January 15, 2009Date of Patent: June 28, 2011Assignee: Honda Motor Co., Ltd.Inventors: Naoyuki Mimatsu, Yasushi Kojima, Seigo Murashige, Yutaka Asano
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Publication number: 20090284080Abstract: A triangular-wave current flows through a reactor of a DC/DC converter for converting voltages between increased and reduced levels. Surges are reduced, which are developed in an output voltage serving as a control voltage when the triangular-wave current changes across a zero value at which the current direction is changed. When a primary current flowing through the reactor changes across 0 [A] (zero value) at which the direction is changed, within an adjustment range, a feedback coefficient by which to multiply the error between the control voltage and a target voltage is multiplied by k (k>1) so as to increase a feedback amount. Surges developed in the control voltage due to a dead time when the primary current changes across 0 [A] are reduced.Type: ApplicationFiled: May 19, 2009Publication date: November 19, 2009Applicant: Honda Motor Co., Ltd.Inventors: Yasushi Kojima, Naoyuki Mimatsu, Seigo Murashige
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Publication number: 20090243386Abstract: A controller is capable of executing direct couple control that directly couples a first power device and a second power device without causing a DC/DC converter to convert voltage. During the direct couple control, a drive signal that causes no voltage conversion is intermittently output to at least one of a plurality of switching devices.Type: ApplicationFiled: January 15, 2009Publication date: October 1, 2009Applicant: Honda Motor Co., Ltd.Inventors: Naoyuki MIMATSU, Yasushi KOJIMA, Seigo MURASHIGE, Yutaka ASANO
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Publication number: 20090212634Abstract: When a DC/DC converter switches between a primary voltage control mode, a secondary voltage control mode, and a current limiting mode as operation modes, an I-term resetting processor outputs an I term depending on the duty ratio in the operation mode before being switched to a PID processor. The PID processor performs a PID control process based on the input I term. A drive duty ratio setter outputs a drive duty ratio immediately after the control mode switching, which is substantially equal to the duty ratio in the operation mode before being switched. As a result, the duty ratios in the operation mode before being switched and the operation mode after being switched are made continuous with respect to each other.Type: ApplicationFiled: February 25, 2009Publication date: August 27, 2009Applicant: HONDA MOTOR CO., LTD.Inventors: Yasushi Kojima, Naoyuki Mimatsu, Seigo Murashige, Yutaka Asano
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Publication number: 20090179623Abstract: If a lower arm device connection period is non-zero in a previous switching cycle, a first dead time is prohibited from decreasing, and if the lower arm device connection period is zero, the first dead time is allowed to decrease, wherein the first dead time is the dead time provided after the lower arm device connection period in the previous switching cycle but before an upper arm device connection period in the current switching cycle.Type: ApplicationFiled: January 15, 2009Publication date: July 16, 2009Applicant: HONDA MOTOR CO., LTD.Inventors: Naoyuki MIMATSU, Yasushi KOJIMA, Yutaka ASANO