Patents by Inventor Masayuki Baba
Masayuki Baba 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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Publication number: 20170274894Abstract: With a motor in rotation, 0 is set as each of a d-axis current command and a q-axis current command, and offset learning is carried out. Then, in carrying out offset learning, a transmission is controlled such that a shift stage of the transmission falls within a low vehicle speed-side predetermined shift stage range. Thus, the rotational speed of the motor can be more reliably made high to a certain extent, and offset learning can be carried out. As a result, the accuracy of offset learning can be restrained from decreasing.Type: ApplicationFiled: March 16, 2017Publication date: September 28, 2017Inventors: Ryoji Sato, Masayuki Baba, Shogo Tanaka, Takuya Shimaji
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Publication number: 20170166194Abstract: A control system of a power transmission system of a vehicle is provided. The power transmission system includes an electric motor for running the vehicle, and a mechanical speed change mechanism. The control system includes an electronic control unit. The electronic control unit is configured to: perform regeneration control of the electric motor for running the vehicle during coasting of the vehicle, such that regenerative torque of the electric motor for running the vehicle provides regenerative torque produced according to braking operation; perform shift control of the mechanical speed change mechanism according to a predetermined relationship; determine whether a rate of change of the regenerative torque is within a predetermined range; and when a downshift of the mechanical speed change mechanism is determined during coasting, execute the downshift under a condition that the rate of change of the regenerative torque is within the predetermined range.Type: ApplicationFiled: December 9, 2016Publication date: June 15, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenta KUMAZAKI, Kazuyuki SHIIBA, Tooru MATSUBARA, Nobufusa KOBAYASHI, Masato YOSHIKAWA, Masayuki BABA, Shun SATO
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Publication number: 20170067557Abstract: An electronic control unit is configured to, when the electronic control unit determines that any one of a first condition and a second condition is satisfied, preferentially execute lower limit speed ratio control. The first condition is a condition that, after the electronic control unit starts shift prohibition control, a wheel lock has occurred before a condition for cancelling the shift prohibition control is satisfied. The second condition is a condition that, after the electronic control unit starts the lower limit speed ratio control, a wheel spin has occurred before a condition for cancelling the lower limit speed ratio control is satisfied.Type: ApplicationFiled: August 25, 2016Publication date: March 9, 2017Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kenta KUMAZAKI, Kazuyuki SHIIBA, Tooru MATSUBARA, Hideharu NOHARA, Masayuki BABA
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Patent number: 9555798Abstract: A drive apparatus for a vehicle includes an engine, an MG, a first rotary shaft, a second rotary shaft, a transmission disposed between the first rotating shaft and the second rotary shaft, a driving wheel, a first clutch capable of interrupting power transmission between the engine and the first rotary shaft, a second clutch capable of interrupting power transmission between the MG and the first rotary shaft, and an ECU for controlling the engine, the MG, the transmission, the first clutch and the second clutch. The ECU releases the second clutch as a rotation speed of the first rotary shaft becomes higher than a threshold value, and sets the threshold value lower in the case where an acceleration request is issued from the driver than in the case where no acceleration request is issued to reduce the operation times for the clutch to engage or disengage the MG.Type: GrantFiled: December 16, 2015Date of Patent: January 31, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masayuki Baba, Takahiko Tsutsumi, Shun Sato
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Patent number: 9511763Abstract: A drive system for a hybrid vehicle includes an engine, a motor, a rotary shaft, an engine disconnect clutch, a motor disconnect clutch, an automatic transmission, and an electronic control unit. The electronic control unit is configured to, while either one of an engagement control and a rotation change control is being executed, when a request to execute the other one of the engagement control and the rotation change control has been issued, (a) delay a start timing of the other one of the engagement control and the rotation change control until execution of the one of the engagement control and the rotation change control is completed, and then (b) start execution of the other one of the engagement control and the rotation change control after execution of the one of the engagement control and the rotation change control has been completed.Type: GrantFiled: March 22, 2016Date of Patent: December 6, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shun Sato, Takahiko Tsutsumi, Masayuki Baba, Toshio Sugimura
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Publication number: 20160325747Abstract: A vehicle is provided with a continuously variable transmission device and an electric control unit controlling an engine, a motor generator, and the continuously variable transmission device. The electric control unit selects any one of a plurality of operation modes, having different correlations between a driver's accelerator operation amount and a control throttle opening, to suit driver's requests, and performs a number-of-revolutions increase control for increasing an engine rotation speed according to at least one of elapsed time from a time point of a vehicle speed increase and elapsed time from a time point of an acceleration request in a case where the control throttle opening exceeds a predetermined threshold. The electric control unit controls the engine to suppress the engine rotation speed change due to a change of the operation mode in a case where the control throttle opening is changed across the predetermined threshold in response to the change of the operation mode.Type: ApplicationFiled: December 30, 2014Publication date: November 10, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yoshiaki TSURUTA, Masayuki BABA
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Publication number: 20160325733Abstract: In a hybrid vehicle including an engine, a motor driven by a battery output, and a continuously variable transmission, when acceleration is requested, an ECU executes feeling-of-acceleration producing control for gradually increasing an engine rotation speed from an initial value NEini lower than an optimum rotation speed. With the battery output, the ECU makes up for a shortfall of engine output caused by the feeling-of-acceleration producing control. When starting the feeling-of-acceleration producing control, the ECU calculates a basic initial value NEini_base lower than the optimum rotation speed, and calculates, based on an atmospheric pressure, a lower limit value NEmin that allows the battery output to be maintained to be equal to or lower than prescribed electric power. The ECU selects a larger one of basic initial value NEini_base and lower limit value NEmin as initial value NEini.Type: ApplicationFiled: December 3, 2014Publication date: November 10, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masayuki BABA, Yoshiaki TSURUTA
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Publication number: 20160280217Abstract: A drive system for a hybrid vehicle includes an engine, a motor, a rotary shaft, an engine disconnect clutch, a motor disconnect clutch, an automatic transmission, and an electronic control unit. The electronic control unit is configured to, while either one of an engagement control and a rotation change control is being executed, when a request to execute the other one of the engagement control and the rotation change control has been issued, (a) delay a start timing of the other one of the engagement control and the rotation change control until execution of the one of the engagement control and the rotation change control is completed, and then (b) start execution of the other one of the engagement control and the rotation change control after execution of the one of the engagement control and the rotation change control has been completed.Type: ApplicationFiled: March 22, 2016Publication date: September 29, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shun SATO, Takahiko TSUTSUMI, Masayuki BABA, Toshio SUGIMURA
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Publication number: 20160236675Abstract: A drive apparatus for a vehicle includes an engine, an MG, a first rotary shaft, a second rotary shaft, a transmission disposed between the first rotating shaft and the second rotary shaft, a driving wheel, a first clutch capable of interrupting power transmission between the engine and the first rotary shaft, a second clutch capable of interrupting power transmission between the MG and the first rotary shaft, and an ECU for controlling the engine, the MG, the transmission, the first clutch and the second clutch. The ECU releases the second clutch as a rotation speed of the first rotary shaft becomes higher than a threshold value, and sets the threshold value lower in the case where an acceleration request is issued from the driver than in the case where no acceleration request is issued to reduce the operation times for the clutch to engage or disengage the MG.Type: ApplicationFiled: December 16, 2015Publication date: August 18, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masayuki BABA, Takahiko TSUTSUMI, Shun SATO
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Patent number: 8951163Abstract: Provided is a control device for a vehicle that can switch between an automatic gear shift mode in which gear shifting of the automatic transmission is performed according to a vehicle traveling condition, and a manual gear shift mode in which gear shifting of the automatic transmission is performed according to a driver operation, and that changes drive force characteristics by controlling output torque of the drive source at the time of a gear shift mode switch. When the gear shift mode is switched between automatic and manual the control device selects an initial gear stage or an initial gear ratio for the gear shift mode switch such that the amount of change in drive force that accompanies the gear shift mode switch decreases, or such that the direction of change in drive force that accompanies the gear shift mode switch conforms to the driver's intention or expected sensation.Type: GrantFiled: March 15, 2010Date of Patent: February 10, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hideaki Otsubo, Masayuki Baba, Takaaki Tokura
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Publication number: 20140200758Abstract: A control device is configured to, during acceleration, set a first operation point on a basis of an engine output power and a high torque constraint, set a second operation point on a basis of the engine output power and a high efficiency constraint, set a target operation point so that a target rotation speed of the engine is varied from a first operation rotation speed toward a second operation rotation speed and the engine output power is output from the engine, set a third operation point on a basis of a travel required power and the high efficiency constraint after that, and vary the target rotation speed from the second operation rotation speed toward a third operation rotation speed and set the target operation point so that the engine is operated at the target operation point to operate the engine in accordance with the high efficiency constraint.Type: ApplicationFiled: January 16, 2014Publication date: July 17, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Masayuki BABA
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Publication number: 20130144986Abstract: When only part of content that is stored inside a terminal is updated, the updated content is allowed to be received efficiently, taking into account reducing the power consumption of the terminal.Type: ApplicationFiled: May 30, 2011Publication date: June 6, 2013Applicants: MITSUBISHI ELECTRIC CORPORATION, NTT DOCOMO, INC.Inventors: Akira Yamada, Tomoyuki Ohya, Hosei Matsuoka, Norihiko Nakazawa, Masayuki Baba
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Publication number: 20130124677Abstract: Provided is a broadcast supplemental data transmission device, a broadcast supplemental data transmission method, and a broadcast system that can reduce the traffic of a communication network as much as possible at the time of supplementing missing data in broadcasted content data. When “GET HTTP/1.1 If Unmodified Since Time Information”, which is a request for retransmission of missing data containing time information, is received from a receiving device, an HTTP response module determines whether there is rebroadcast of contents containing missing data based on the time information contained in the request for retransmission. When it is determined by the HTTP response module that there is rebroadcast, “412 Precondition Failed”, which is one of error notifications, is transmitted as a response to the receiving device, and the transmission of the contents through a communication network is not performed.Type: ApplicationFiled: May 20, 2011Publication date: May 16, 2013Applicants: MITSUBISHI ELECTRIC CORPORATION, NTT DOCOMO, INC.Inventors: Hosei Matsuoka, Akira Yamada, Tomoyuki Ohya, Norihiko Nakazawa, Masayuki Baba
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Patent number: 8409056Abstract: A shift output torque control unit executes a shift output torque control to control an engine torque so as to reduce a driving force difference, which is a variation width of a driving force due to downshift of an automatic transmission. Thus, in comparison with the case in which the shift output torque control is not executed, it is possible to smooth a variation in driving force associated with the downshift. As a result, occupants' comfort and controllability to driving operation may be improved.Type: GrantFiled: November 6, 2008Date of Patent: April 2, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Seiji Kuwahara, Hideaki Otsubo, Masato Kaigawa, Shogo Matsumoto, Masayuki Baba
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Patent number: 8369341Abstract: Provided are: a multiplexing apparatus for comparing priorities, selecting multiplexed data in an arbitrary output rate, and outputting the multiplexed data; and a receiving apparatus for combining data outputted from the multiplexing apparatus in a time sequential order, and thereafter outputting the data.Type: GrantFiled: January 18, 2005Date of Patent: February 5, 2013Assignee: Mitsubishi Electric CorporationInventors: Masayuki Baba, Yoshiaki Kato
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Publication number: 20130013161Abstract: Provided is a control device for a vehicle that can switch between an automatic gear shift mode in which gear shifting of the automatic transmission is performed according to a vehicle traveling condition, and a manual gear shift mode in which gear shifting of the automatic transmission is performed according to a driver operation, and that changes drive force characteristics by controlling output torque of the drive source at the time of a gear shift mode switch. When the gear shift mode is switched between automatic and manual the control device selects an initial gear stage or an initial gear ratio for the gear shift mode switch such that the amount of change in drive force that accompanies the gear shift mode switch decreases, or such that the direction of change in drive force that accompanies the gear shift mode switch conforms to the driver's intention or expected sensation.Type: ApplicationFiled: March 15, 2010Publication date: January 10, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hideaki Otsubo, Masayuki Baba, Takaaki Tokura
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Patent number: 8326114Abstract: A control unit (3) is provided for storing time information of data which are received for the first time by a receiving unit (1) in a memory (3a), and for, every time when the receiving unit (1) detects time information, acquiring the time information from the receiving unit (1), calculating the difference between the acquired time information and the time information of the first received data stored in the memory (3a), and, when the difference reaches a predetermined amount, outputting a command for starting a playback of data to a playback unit (4). The playback unit (4) starts a playback of the data stored in the storage unit (2) when the command for starting a playback of data is outputted from the control unit (3).Type: GrantFiled: November 29, 2007Date of Patent: December 4, 2012Assignee: Mitsubishi Electric CorporationInventors: Masayuki Baba, Hiroyuki Kurokawa, Mitsuyoshi Suzuki, Takehiko Hanada
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Patent number: 8313414Abstract: An electronic control unit is provided with two types of gear change maps: a first gear change map based on the vehicle speed and the accelerator pedal operation amount; and a second gear change map based on the vehicle speed and the required drive force of the vehicle. The electronic control unit determines whether the automatic transmission should downshift with reference to the first gear change map, and determines whether the automatic transmission should upshift with reference to the second gear change map.Type: GrantFiled: October 21, 2008Date of Patent: November 20, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Seiji Kuwahara, Hideaki Otsubo, Masato Kaigawa, Masayuki Baba
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Patent number: 7914325Abstract: The invention has an object of providing a connector for connecting between a printed circuit board and a test device, capable of easily attaching and detaching the connector at low cost. The connector includes at least one conducting pin 28 that is protruded from a connector body, and at least one fixing pin 30 that is extended substantially in parallel with the conducting pin. The fixing pin 30 is longer than the conducting pin 28.Type: GrantFiled: October 29, 2009Date of Patent: March 29, 2011Assignee: Fujitsu LimitedInventors: Masayuki Baba, Shuichi Kameyama
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Publication number: 20100197457Abstract: A shift output torque control unit executes a shift output torque control to control an engine torque so as to reduce a driving force difference, which is a variation width of a driving force due to downshift of an automatic transmission. Thus, in comparison with the case in which the shift output torque control is not executed, it is possible to smooth a variation in driving force associated with the downshift. As a result, occupants' comfort and controllability to driving operation may be improved.Type: ApplicationFiled: November 6, 2008Publication date: August 5, 2010Applicant: Toyota Jidosha Kabushiki KaishaInventors: Seiji Kuwahara, Hideaki Otsubo, Masato Kaigawa, Shogo Matsumoto, Masayuki Baba