Patents by Inventor Izumi Takagi
Izumi Takagi 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: 9038754Abstract: A hybrid vehicle is provided. The hybrid vehicle may include an engine, an electric generator joined to the engine, and an electric drive motor, comprises a driver seat on which a driver is seated; and an engine room provided forward or rearward relative to the driver seat. Further, the engine is placed such that a crankshaft extends vertically, and a rotor of the electric generator is mounted to an upper end portion or a lower end portion of the crankshaft such that the rotor is rotatable integrally with the crankshaft.Type: GrantFiled: December 30, 2011Date of Patent: May 26, 2015Assignee: Kawasaki Jukogyo Kabushiki KaishaInventor: Izumi Takagi
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Patent number: 8965609Abstract: An electric vehicle is presented. The electric vehicle may include a front motor for driving a front wheel; a rear motor for driving a rear wheel; a target torque determiner for determining a target torque of the front motor and a target torque of the rear motor, based on at least a displacement amount of an accelerator operation member operated by a driver; and a motor controller for controlling the front motor and the rear motor to cause the front motor to output the target torque and the rear motor to output the target torque.Type: GrantFiled: December 29, 2011Date of Patent: February 24, 2015Assignee: Kawasaki Jukogyo Kabushiki KaishaInventor: Izumi Takagi
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Patent number: 8948943Abstract: A drive control system in a series-hybrid utility vehicle comprises a motor for driving a wheel; a battery; an engine electric generator for generating the electric power charged into the battery; and a controller configured to estimate an SOC value of the battery, and control the motor and the engine electric generator in accordance with an HV mode or an EV mode; wherein when the estimated SOC value is less than a predetermined low threshold, the controller stops electric power supply from the battery to the motor; and when the estimated SOC value is less than a predetermined medium threshold greater than the predetermined low threshold, the controller sets the HV mode, and controls the motor and the engine electric generator such that a driving power of the motor is suppressed in a state where the motor is supplied with the electric power from the battery.Type: GrantFiled: December 29, 2011Date of Patent: February 3, 2015Assignee: Kawasaki Jukogyo Kabushiki KaishaInventor: Izumi Takagi
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Patent number: 8936120Abstract: A hybrid utility vehicle is provided. The hybrid utility vehicle may include right and left front wheels suspended from a vehicle body. The hybrid utility vehicle may further include a front differential gear device coupled to the right and left front wheels via a pair of front axles, respectively, the differential gear device including an input shaft extending in a direction substantially perpendicular to the front axles. The hybrid utility vehicle may further include a front electric motor positioned at a front portion of the vehicle body and coupled to the input shaft of the front differential gear device.Type: GrantFiled: December 29, 2011Date of Patent: January 20, 2015Assignee: Kawasaki Jukogyo Kabushiki KaishaInventor: Izumi Takagi
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Patent number: 8807680Abstract: A method for driving a piezoelectric element of a head, including: a step of increasing a voltage of a power source to a reference voltage level; and a step of charging one electrode of two electrodes interposing the piezoelectric element to the reference voltage level by repeating source-connections and source-disconnections between the power source and the one electrode while keeping the voltage of the power source at the reference voltage level, such that a ratio of a connection time of each of at least one of second and subsequent connections of the source-connections to a disconnection time of a corresponding source-disconnection continued from each of the at least one of the second and subsequent connections is greater than a ratio of a connection time of a first connection of the source-connections to a disconnection time of a source-disconnection continued from the first connection.Type: GrantFiled: March 29, 2012Date of Patent: August 19, 2014Assignee: Brother Kogyo Kabushiki KaishaInventor: Izumi Takagi
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Patent number: 8766498Abstract: An electric generator incorporated into a hybrid vehicle including an engine and an electric drive motor and actuated by the engine, comprises a rotor mounted to one end portion of a crankshaft of the engine such that the rotor is rotatable integrally with the crankshaft; a cylindrical accommodating member surrounding an outer periphery of the rotor; and an air outlet provided on a peripheral wall portion of the accommodating member such that the air outlet opens in the vicinity of the outer periphery of the rotor and is tilted in a forward direction of a rotational direction of the rotor and in a radially outward direction.Type: GrantFiled: December 30, 2011Date of Patent: July 1, 2014Assignee: Kawasaki Jukogyo Kabushiki KaishaInventor: Izumi Takagi
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Patent number: 8662239Abstract: A series-hybrid vehicle is provided, comprising a vehicle body frame; a pair of right and left front wheels; a pair of right and left rear wheels; a drive motor mounted to the vehicle body frame to drive the front wheels or the rear wheels; a battery mounted to a center portion of the vehicle body frame in a forward and rearward direction to supply electric power to the drive motor; an engine electric generator including an electric generator for generating electric power charged into the battery and an engine for actuating the electric generator; and a driver seat; wherein the driver seat is positioned rightward or leftward relative to a center portion of the vehicle body frame in a vehicle width direction; and the engine is positioned at an opposite side of the driver seat relative to the center portion of the vehicle body frame in the vehicle width direction.Type: GrantFiled: December 28, 2011Date of Patent: March 4, 2014Assignee: Kawasaki Jukogyo Kabushiki KaishaInventor: Izumi Takagi
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Patent number: 8657058Abstract: A vehicle is presented. The vehicle may include a vehicle body frame; a drive wheel suspended from the vehicle body frame; a drive motor for driving the drive wheel; a battery for supplying electric power to the drive motor; a floor panel constituting a floor surface of the vehicle; and a battery support plate having a battery placement surface on which the battery is placed; wherein the battery support plate and the floor panel are supported on the vehicle body frame; and the battery placement surface is positioned below an upper surface of the floor panel.Type: GrantFiled: December 28, 2011Date of Patent: February 25, 2014Assignee: Kawasaki Jukogyo Kabushiki KaishaInventor: Izumi Takagi
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Patent number: 8655533Abstract: An electric vehicle is provided. The electric vehicle may include a motor for driving a wheel; a brake device for braking the wheel in response to a driver's operation of a brake operation member; and a controller for controlling the motor in response to the driver's operation of an accelerator operation member. The controller may include a first motor control section for causing the motor to be placed in a regenerative braking mode to generate a first regenerative braking force, when a displacement amount of the accelerator operation member decreases to an amount less than a predetermined reference displacement amount; and a second motor control section for causing the motor to generate a second regenerative braking force which is a sum of the first regenerative braking force and a predetermined additional braking force, in response to the operation of the brake operation member.Type: GrantFiled: December 29, 2011Date of Patent: February 18, 2014Assignee: Kawasaki Jukogyo Kabushiki KaishaInventor: Izumi Takagi
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Publication number: 20130168177Abstract: A vehicle is presented. The vehicle may include a vehicle body frame; a drive wheel suspended from the vehicle body frame; a drive motor for driving the drive wheel; a battery for supplying electric power to the drive motor; a floor panel constituting a floor surface of the vehicle; and a battery support plate having a battery placement surface on which the battery is placed; wherein the battery support plate and the floor panel are supported on the vehicle body frame; and the battery placement surface is positioned below an upper surface of the floor panel.Type: ApplicationFiled: December 28, 2011Publication date: July 4, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventor: Izumi Takagi
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Publication number: 20130173098Abstract: A drive control system in a series-hybrid utility vehicle comprises a motor for driving a wheel; a battery; an engine electric generator for generating the electric power charged into the battery; and a controller configured to estimate an SOC value of the battery, and control the motor and the engine electric generator in accordance with an HV mode or an EV mode; wherein when the estimated SOC value is less than a predetermined low threshold, the controller stops electric power supply from the battery to the motor; and when the estimated SOC value is less than a predetermined medium threshold greater than the predetermined low threshold, the controller sets the HV mode, and controls the motor and the engine electric generator such that a driving power of the motor is suppressed in a state where the motor is supplied with the electric power from the battery.Type: ApplicationFiled: December 29, 2011Publication date: July 4, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventor: Izumi Takagi
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Publication number: 20130168176Abstract: A series-hybrid vehicle is provided, comprising a vehicle body frame; a pair of right and left front wheels; a pair of right and left rear wheels; a drive motor mounted to the vehicle body frame to drive the front wheels or the rear wheels; a battery mounted to a center portion of the vehicle body frame in a forward and rearward direction to supply electric power to the drive motor; an engine electric generator including an electric generator for generating electric power charged into the battery and an engine for actuating the electric generator; and a driver seat; wherein the driver seat is positioned rightward or leftward relative to a center portion of the vehicle body frame in a vehicle width direction; and the engine is positioned at an opposite side of the driver seat relative to the center portion of the vehicle body frame in the vehicle width direction.Type: ApplicationFiled: December 28, 2011Publication date: July 4, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventor: Izumi Takagi
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Publication number: 20130173100Abstract: An electric vehicle is presented. The electric vehicle may include a front motor for driving a front wheel; a rear motor for driving a rear wheel; a target torque determiner for determining a target torque of the front motor and a target torque of the rear motor, based on at least a displacement amount of an accelerator operation member operated by a driver; and a motor controller for controlling the front motor and the rear motor to cause the front motor to output the target torque and the rear motor to output the target torque.Type: ApplicationFiled: December 29, 2011Publication date: July 4, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventor: Izumi Takagi
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Publication number: 20130168178Abstract: A hybrid vehicle is provided. The hybrid vehicle may include an engine, an electric generator joined to the engine, and an electric drive motor, comprises a driver seat on which a driver is seated; and an engine room provided forward or rearward relative to the driver seat. Further, the engine is placed such that a crankshaft extends vertically, and a rotor of the electric generator is mounted to an upper end portion or a lower end portion of the crankshaft such that the rotor is rotatable integrally with the crankshaft.Type: ApplicationFiled: December 30, 2011Publication date: July 4, 2013Applicant: Kawasaki Jukogyo Kabushiki KaishaInventor: Izumi Takagi
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Publication number: 20130168168Abstract: A hybrid vehicle is provided. The hybrid vehicle may comprise a vehicle body frame; a metal-made heat radiation plate having a flat plate portion of a substantially plate shape, the flat plate portion having obverse and reverse flat surfaces; a first electric component provided on one of the obverse and reverse flat surfaces of the flat plate portion. Further, the surface of the flat plate portion on which the first electric component is provided is greater in area than an electric component mounting section to which the first electric component is mounted.Type: ApplicationFiled: December 28, 2011Publication date: July 4, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventor: Izumi Takagi
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Publication number: 20130168174Abstract: A hybrid utility vehicle is provided. The hybrid utility vehicle may include right and left front wheels suspended from a vehicle body. The hybrid utility vehicle may further include a front differential gear device coupled to the right and left front wheels via a pair of front axles, respectively, the differential gear device including an input shaft extending in a direction substantially perpendicular to the front axles. The hybrid utility vehicle may further include a front electric motor positioned at a front portion of the vehicle body and coupled to the input shaft of the front differential gear device.Type: ApplicationFiled: December 29, 2011Publication date: July 4, 2013Applicant: Kawasaki Jukogyo Kabushiki KaishaInventor: Izumi Takagi
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Publication number: 20130173099Abstract: An electric vehicle is provided. The electric vehicle may include a motor for driving a wheel; a brake device for braking the wheel in response to a driver's operation of a brake operation member; and a controller for controlling the motor in response to the driver's operation of an accelerator operation member. The controller may include a first motor control section for causing the motor to be placed in a regenerative braking mode to generate a first regenerative braking force, when a displacement amount of the accelerator operation member decreases to an amount less than a predetermined reference displacement amount; and a second motor control section for causing the motor to generate a second regenerative braking force which is a sum of the first regenerative braking force and a predetermined additional braking force, in response to the operation of the brake operation member.Type: ApplicationFiled: December 29, 2011Publication date: July 4, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventor: Izumi Takagi
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Publication number: 20130169118Abstract: An electric generator incorporated into a hybrid vehicle including an engine and an electric drive motor and actuated by the engine, comprises a rotor mounted to one end portion of a crankshaft of the engine such that the rotor is rotatable integrally with the crankshaft; a cylindrical accommodating member surrounding an outer periphery of the rotor; and an air outlet provided on a peripheral wall portion of the accommodating member such that the air outlet opens in the vicinity of the outer periphery of the rotor and is tilted in a forward direction of a rotational direction of the rotor and in a radially outward direction.Type: ApplicationFiled: December 30, 2011Publication date: July 4, 2013Applicant: KAWASAKI JUKOGYO KABUSHIKI KAISHAInventor: Izumi Takagi
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Patent number: 8373385Abstract: A non-contact charger includes: a casing having a recessed portion in which a cordless handset is placeable; a primary coil which is provided in the casing to be opposed to the cordless handset upon placement of the cordless handset in the recessed portion of the casing; an oscillating portion which is oscillatable to generate a magnetic flux energy from the primary coil; a detecting portion which detects at least one of a current value and a voltage value in the oscillating portion; and a controller which stops a generation of the magnetic flux energy based on at least one of the current value and the voltage value detected by the detecting portion.Type: GrantFiled: February 25, 2008Date of Patent: February 12, 2013Assignee: Brother Kogyo Kabushiki KaishaInventor: Izumi Takagi
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Publication number: 20120327150Abstract: A method for driving a piezoelectric element of a head, including: a step of increasing a voltage of a power source to a reference voltage level; and a step of charging one electrode of two electrodes interposing the piezoelectric element to the reference voltage level by repeating source-connections and source-disconnections between the power source and the one electrode while keeping the voltage of the power source at the reference voltage level, such that a ratio of a connection time of each of at least one of second and subsequent connections of the source-connections to a disconnection time of a corresponding source-disconnection continued from each of the at least one of the second and subsequent connections is greater than a ratio of a connection time of a first connection of the source-connections to a disconnection time of a source-disconnection continued from the first connection.Type: ApplicationFiled: March 29, 2012Publication date: December 27, 2012Applicant: BROTHER KOGYO KABUSHIKI KAISHAInventor: Izumi TAKAGI