Patents by Inventor Keiichi Enoki
Keiichi Enoki 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: 9248826Abstract: A control device (10) includes: target deceleration calculation means (101) for calculating a target deceleration by using a target deceleration map in which a target deceleration is set for each vehicle speed; command power-generation torque calculation means (102) for calculating a command power-generation torque based on the target deceleration, a rotation speed of a power generator (2), and a transmission gear ratio of a transmission (3); and command Duty calculation means (103) for calculating a command Duty based on the command power-generation torque, and the rotation speed and an output voltage of the power generator (2). The target deceleration map is calculated based on a vehicle-speed shift in accordance with actual running conditions when a vehicle is decelerating with fuel stop.Type: GrantFiled: April 9, 2012Date of Patent: February 2, 2016Assignee: Mitsubishi Electric CorporationInventors: Kensuke Hayashi, Shingo Yamaguchi, Keiichi Enoki, Toshiaki Date
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Patent number: 9240743Abstract: Provided is a power-generation control device capable of appropriately using a drive belt looped around a power generator and an internal-combustion engine mounted on a vehicle. The device monitors a difference between an actual generated current of a rotating electrical machine and an estimated generated current estimated from estimated power-generation torque for controlling power generation of the rotating electrical machine, which corresponds to a power-generation torque command, or the like. When a difference equal to or more than a predetermined value occurs between the actual and the estimated generated currents, the power-generation control device limits the estimated power-generation torque so as to be reduced, and further limits the estimated power-generation torque with use of learning limiting power-generation torque calculated based on the estimated power-generation torque at a time when the difference has occurred between the actual generated current and the estimated generated current.Type: GrantFiled: April 11, 2012Date of Patent: January 19, 2016Assignee: Mitsubishi Electric CorporationInventors: Kensuke Hayashi, Keiichi Enoki, Yoshimasa Nishijima
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Publication number: 20150367734Abstract: A vehicle control part includes: a vehicle stop determination part for determining whether or not the vehicle is stopped; a clutch control part for disengaging the clutch when stop of the vehicle is determined; a motor control part for driving the motor so as to drive the oil circulation part after the clutch is disengaged; and a motor magnet temperature estimation part for detecting an inducted voltage generated by drive of the motor, and estimating a magnet temperature of the motor from the detected induced voltage of the motor. The motor control part continues the drive of the motor when the estimated magnet temperature of the motor is higher than a predetermined reference temperature at which the motor needs to be cooled, and stops the drive of the motor when the magnet temperature of the motor is equal to or lower than the predetermined reference temperature.Type: ApplicationFiled: April 11, 2013Publication date: December 24, 2015Applicant: Mitsubishi Electric CorporationInventors: Nobuhide MORI, Keiichi ENOKI, Hiroyuki KOBAYASHI, Yasufumi OGAWA, Kotaro NAKANO
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Publication number: 20150360676Abstract: The control device for a hybrid vehicle includes: a mechanical power source; an electric motor to be used when the mechanical power source is started; a first clutch arranged between the mechanical power source and a first transmission mechanism including a plurality of gear shift stages; a second clutch arranged between the mechanical power source and a second transmission mechanism including a plurality of gear shift stages; an electrical power source coupled to an input shaft of the first transmission mechanism; and a control unit for controlling a torque of at least one of the second clutch or the electric motor so as to compensate a braking force decreased upon a gear shift in the electrical power source when a gear shift request for shifting the gear shift stage of the first transmission mechanism is made during a regeneration travel of the electrical power source.Type: ApplicationFiled: April 23, 2013Publication date: December 17, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kotaro NAKANO, Keiichi ENOKI, Nobuhide MORI, Hiroyuki KOBAYASHI, Yasufumi OGAWA
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Patent number: 9211805Abstract: A power source current control unit (102) controls a magnetic-field current PWM control signal (PW) for PWM-controlling a magnetic-field current of an electric rotating machine (3) so that the value of a power source current flowing in a power source apparatus (2) can be controlled in a non-energization manner to be zero or a value near to zero; in the case where the power source voltage stability determination unit (104) determines that during a predetermined period, variation in a power source inter-terminal voltage value (V) of the power source apparatus (2) is within a predetermined range, the power source SOC estimation unit (101) estimates the state of charge of the power source apparatus (2), based on the voltage value (V) of the power source apparatus (2).Type: GrantFiled: April 16, 2012Date of Patent: December 15, 2015Assignee: Mitsubishi Electric CorporationInventors: Kensuke Hayashi, Shingo Yamaguchi, Keiichi Enoki
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Publication number: 20150222216Abstract: In order to highly accurately estimate a temperature of a permanent magnet to be used for a rotor of a motor, provided is a motor control device for a vehicle including a motor as a drive power source, in which an estimation mode setting section sets, when a predetermined condition for estimating the temperature of the permanent magnet to be used for the rotor of the motor is established under a state in which the motor generates drive power to run the vehicle, a current flowing through the motor to 0, and a permanent magnet temperature estimation section estimates the temperature of the permanent magnet based on an induced voltage of the motor in a period during which the current flowing through the motor is 0.Type: ApplicationFiled: October 11, 2012Publication date: August 6, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yasufumi Ogawa, Keiichi Enoki, Nobuhide Mori, Hiroyuki Kobayashi
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Publication number: 20150180386Abstract: A motor controller for an electric vehicle sufficiently reduces vibration components caused by torque ripples passing through a resonance frequency of a vehicle body. The motor controller includes motor torque setting means for generating a first torque command, based on vehicle information, rotation position detection means for detecting a rotation position of the motor, rotation speed calculation means for calculating a rotation speed from a rotation position signal, a high-pass filter that extracts an AC signal component of a rotation speed signal, and a resonance suppression gain circuit that outputs a resonance suppression signal. A signal in which the resonance suppression signal is added to or subtracted from the first torque command is used as a second torque command so as to perform drive control for the motor.Type: ApplicationFiled: October 15, 2012Publication date: June 25, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Keiichi Enoki, Masahiro Iezawa, Nobuhide Mori, Yasufumi Ogawa, Hiroyuki Kobayashi
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Patent number: 9050895Abstract: A phase difference between an inductive voltage of an armature winding of a rotating electrical machine and an output of a magnetic pole position sensor is detected by a phase difference detection unit. The output of the magnetic pole position sensor is corrected on the basis of the phase difference thus detected and a power conversion unit is controlled on the basis of the corrected output.Type: GrantFiled: August 31, 2012Date of Patent: June 9, 2015Assignee: Mitsubishi Electric CorporationInventors: Hiroyuki Kobayashi, Yasufumi Ogawa, Keiichi Enoki
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Patent number: 9030156Abstract: In a power supply system provided with an assembled battery supervisory device which supervises an assembled battery composed of storage elements connected in series with one another, the system using the assembled battery is obtained which makes it possible to supply electric power to the assembled battery supervisory device, with a simple arrangement. The arrangement is such that electric power for the assembled battery supervisory device is obtained from a part of storage elements constituting the assembled battery. The cell balancer is driven based on the average consumption electric current of the assembled battery supervisory device so as to suppress a deviation in the amount of charge between those storage elements which supply electric power to the assembled battery supervisory device, and those storage elements which do not supply electric power to the assembled battery supervisory device, resulting from the average consumption electric current of the assembled battery supervisory device.Type: GrantFiled: September 13, 2012Date of Patent: May 12, 2015Assignee: Mitsubishi Electric CorporationInventors: Kensuke Hayashi, Keiichi Enoki, Shingo Yamaguchi, Yoshimasa Nishijima, Yuji Zushi
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Patent number: 9018894Abstract: A vehicular power supply system is provided, which is equipped with a two-battery power supply system including a lithium-ion battery and a lead battery, and can securely supply the lead battery with power without fail even when the lithium-ion battery is disconnected by a relay.Type: GrantFiled: July 13, 2011Date of Patent: April 28, 2015Assignee: Mitsubishi Electric CorporationInventor: Keiichi Enoki
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Publication number: 20150008889Abstract: Provided is a power-generation control device capable of appropriately using a drive belt looped around a power generator and an internal-combustion engine mounted on a vehicle. The device monitors a difference between an actual generated current of a rotating electrical machine and an estimated generated current estimated from estimated power-generation torque for controlling power generation of the rotating electrical machine, which corresponds to a power-generation torque command, or the like. When a difference equal to or more than a predetermined value occurs between the actual and the estimated generated currents, the power-generation control device limits the estimated power-generation torque so as to be reduced, and further limits the estimated power-generation torque with use of learning limiting power-generation torque calculated based on the estimated power-generation torque at a time when the difference has occurred between the actual generated current and the estimated generated current.Type: ApplicationFiled: April 11, 2012Publication date: January 8, 2015Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kensuke Hayashi, Keiichi Enoki, Yoshimasa Nishijima
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Publication number: 20140379191Abstract: A control device (10) includes: target deceleration calculation means (101) for calculating a target deceleration by using a target deceleration map in which a target deceleration is set for each vehicle speed; command power-generation torque calculation means (102) for calculating a command power-generation torque based on the target deceleration, a rotation speed of a power generator (2), and a transmission gear ratio of a transmission (3); and command Duty calculation means (103) for calculating a command Duty based on the command power-generation torque, and the rotation speed and an output voltage of the power generator (2). The target deceleration map is calculated based on a vehicle-speed shift in accordance with actual running conditions when a vehicle is decelerating with fuel stop.Type: ApplicationFiled: April 9, 2012Publication date: December 25, 2014Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kensuke Hayashi, Shingo Yamaguchi, Keiichi Enoki, Toshiaki Date
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Patent number: 8904983Abstract: An automatic starting device for the engine, which quietly and quickly restarts the engine when a re-acceleration request is made by a driver, is provided. In a case where it is judged that a vehicle is decelerating and fuel injection is currently stopped, when it is then judged that a brake pedal is released and an engine rpm is smaller than an engine rpm which allows recovery from a fuel-supply stop state, the controller disengages a lock-up clutch. Upon detection of reverse rotation of the engine based on a detection signal of the crank-angle sensor, the controller controls a pinion gear to be pushed out by a lever of a starter to be meshed with a ring gear. After the ring gear is rotated by a predetermined angle, the controller rotary-drives a motor of the starter to restart the engine.Type: GrantFiled: May 18, 2010Date of Patent: December 9, 2014Assignee: Mitsubishi Electric CorporationInventor: Keiichi Enoki
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Patent number: 8840525Abstract: Provided is a control apparatus for an internal combustion engine, which quietly restarts the engine with a reduced torque shock when a re-acceleration request is made by a driver.Type: GrantFiled: May 25, 2010Date of Patent: September 23, 2014Assignee: Mitsubishi Electric CorporationInventor: Keiichi Enoki
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Publication number: 20140156130Abstract: A control apparatus of an electrically-driven vehicle controls an electrically-driven vehicle including a motor transmitting a drive force to wheels, an inverter driving the motor, and a battery supplying power to the inverter. The control apparatus includes battery storage amount estimation means for estimating a storage amount of the battery and motor rotation speed detection means for detecting a rotation speed of the motor. Output terminals of the inverter are short-circuited when the rotation speed of the motor reaches or exceeds a predetermined rotation speed while the storage amount estimated by the battery storage amount estimation means is equal to or greater than a predetermined amount.Type: ApplicationFiled: October 26, 2011Publication date: June 5, 2014Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yasufumi Ogawa, Keiichi Enoki, Takuya Tamura
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Publication number: 20130278195Abstract: A phase difference between an inductive voltage of an armature winding of a rotating electrical machine and an output of a magnetic pole position sensor is detected by a phase difference detection unit. The output of the magnetic pole position sensor is corrected on the basis of the phase difference thus detected and a power conversion unit is controlled on the basis of the corrected output.Type: ApplicationFiled: August 31, 2012Publication date: October 24, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Hiroyuki KOBAYASHI, Yasufumi OGAWA, Keiichi ENOKI
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Publication number: 20130271082Abstract: In a power supply system provided with an assembled battery supervisory device which supervises an assembled battery composed of storage elements connected in series with one another, the system using the assembled battery is obtained which makes it possible to supply electric power to the assembled battery supervisory device, with a simple arrangement. The arrangement is such that electric power for the assembled battery supervisory device is obtained from a part of storage elements constituting the assembled battery. The cell balancer is driven based on the average consumption electric current of the assembled battery supervisory device so as to suppress a deviation in the amount of charge between those storage elements which supply electric power to the assembled battery supervisory device, and those storage elements which do not supply electric power to the assembled battery supervisory device, resulting from the average consumption electric current of the assembled battery supervisory device.Type: ApplicationFiled: September 13, 2012Publication date: October 17, 2013Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kensuke HAYASHI, Keiichi ENOKI, Shingo YAMAGUCHI, Yoshimasa NISHIJIMA, Yuji ZUSHI
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Publication number: 20130119756Abstract: A power source current control unit (102) controls a magnetic-field current PWM control signal (PW) for PWM-controlling a magnetic-field current of an electric rotating machine (3) so that the value of a power source current flowing in a power source apparatus (2) can be controlled in a non-energization manner to be zero or a value near to zero; in the case where the power source voltage stability determination unit (104) determines that during a predetermined period, variation in a power source inter-terminal voltage value (V) of the power source apparatus (2) is within a predetermined range, the power source SOC estimation unit (101) estimates the state of charge of the power source apparatus (2), based on the voltage value (V) of the power source apparatus (2).Type: ApplicationFiled: April 16, 2012Publication date: May 16, 2013Applicant: Mitsubishi Electric CorporationInventors: Kensuke HAYASHI, Shingo YAMAGUCHI, Keiichi ENOKI
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Publication number: 20120268058Abstract: A vehicular power supply system is provided, which is equipped with a two-battery power supply system including a lithium-ion battery and a lead battery, and can securely supply the lead battery with power without fail even when the lithium-ion battery is disconnected by a relay.Type: ApplicationFiled: July 13, 2011Publication date: October 25, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Keiichi ENOKI
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Publication number: 20110146609Abstract: An automatic starting device for the engine, which quietly and quickly restarts the engine when a re-acceleration request is made by a driver, is provided. In a case where it is judged that a vehicle is decelerating and fuel injection is currently stopped, when it is then judged that a brake pedal is released and an engine rpm is smaller than an engine rpm which allows recovery from a fuel-supply stop state, the controller disengages a lock-up clutch. Upon detection of reverse rotation of the engine based on a detection signal of the crank-angle sensor, the controller controls a pinion gear to be pushed out by a lever of a starter to be meshed with a ring gear. After the ring gear is rotated by a predetermined angle, the controller rotary-drives a motor of the starter to restart the engine.Type: ApplicationFiled: May 18, 2010Publication date: June 23, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Keiichi ENOKI