Patents by Inventor Kota Miura
Kota Miura 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: 20150323395Abstract: For clutch (23) in vehicle driving force transmitting system, having operating states of full engagement, slip engagement and disengagement, there are provided heat generation calculating section (32) calculating per-unit-time temperature increase ?T(up) from heat generation quantity (?t) generated among friction material members of clutch (23), heat dissipation calculating section (33) calculating per-unit-time temperature decrease ?T(down) from heat dissipation quantity f(t) dissipated from the friction material of clutch (23), and clutch temperature estimation calculating process section (31) calculating current clutch temperature Tnow by adding temperature variation ?T to previous clutch temperature Tpv. Heat dissipation calculating section (33) estimates a quantity of lubricating oil passing around the friction material of clutch (23) and uses the estimated lubricating oil quantity for the heat dissipation quantity f(t) dissipated by heat transfer from the friction material to the lubricating oil.Type: ApplicationFiled: November 28, 2013Publication date: November 12, 2015Applicant: JATCO LTDInventors: Hiroki KAWAKAMI, Atsumi MURAMOTO, Kota MIURA
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Patent number: 8725333Abstract: In control apparatus and method for a vehicle, the vehicle including a traveling mode (a WSC traveling mode) in which a slip control is performed for a clutch (second clutch CL2) and a revolution speed control is performed for the driving source such that a revolution speed at a driving source side of the clutch becomes higher than that at a driving wheel side of the clutch by a predetermined revolution speed, an actual torque of a driving source of the vehicle is detected, a command hydraulic pressure is reduced from an initial command hydraulic pressure and a post-correction command hydraulic pressure is set on a basis of the command hydraulic pressure when a variation in the actual torque of the driving source along with the reduction of the command hydraulic pressure is determined to end, when a vehicle stopped state is determined to occur during the traveling mode.Type: GrantFiled: October 28, 2011Date of Patent: May 13, 2014Assignees: Jatco Ltd, Nissan Motor Co., Ltd.Inventors: Hiromichi Akebono, Hideharu Yamamoto, Kota Miura, Hisashi Saito
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Patent number: 8672805Abstract: A hybrid electric vehicle has a first mode in which slippage of a clutch between an electric motor and a driving wheel is allowed and controlled by rotational speed control of the electric motor and a second mode in which the slippage of the clutch is allowed and controlled by rotational speed control of an engine. When the vehicle is stationary in the first mode, a controller reduces a control setpoint of hydraulic pressure of the clutch from an initial point. The controller identifies a reference point of the control setpoint with which actual output torque of the electric motor becomes unchanged with respect to the reduction of the control setpoint. Then, the controller increases the control setpoint from the reference point at a higher gradient and then a lower gradient, and then sets the control setpoint to a corrected point below the initial point and above the reference point.Type: GrantFiled: January 30, 2012Date of Patent: March 18, 2014Assignees: JATCO Ltd, Nissan Motor Co., Ltd.Inventors: Hiromichi Akebono, Hideharu Yamamoto, Kota Miura, Hisashi Saito
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Patent number: 8579759Abstract: A hybrid electric vehicle has a first mode in which slippage of a clutch between an electric motor and a driving wheel is allowed and controlled by rotational speed control of the electric motor and a second mode in which the slippage of the clutch is allowed and controlled by rotational speed control of an engine. When the vehicle is stationary in the first mode, a controller reduces a control setpoint of hydraulic pressure of the clutch from an initial point. The controller identifies a reference point of the control setpoint with which actual output torque of the electric motor is substantially constant with respect to the reduction of the control setpoint. Then, the controller increases the control setpoint to a precharge point, and reduces the control setpoint to a corrected point that is lower than or substantially equal to the initial point and higher than the reference point.Type: GrantFiled: October 28, 2011Date of Patent: November 12, 2013Assignee: JATCO LtdInventors: Hiromichi Akebono, Hideharu Yamamoto, Kota Miura, Hisashi Saito
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Patent number: 8437933Abstract: A hybrid electric vehicle has a first mode in which slippage of a clutch between an electric motor and a driving wheel is allowed and controlled by rotational speed control of the electric motor and a second mode in which the slippage of the clutch is allowed and controlled by rotational speed control of an engine. When the vehicle is stationary in the first mode, a controller reduces a control setpoint of hydraulic pressure of the clutch from an initial point. The controller identifies a reference point of the control setpoint with which actual output torque of the electric motor is substantially constant with respect to the reduction of the control setpoint. Then, the controller increases the control setpoint to a precharge point, and reduces the control setpoint to a corrected point that is lower than or substantially equal to the initial point and higher than the reference point.Type: GrantFiled: October 28, 2011Date of Patent: May 7, 2013Assignee: Jatco LtdInventors: Hiromichi Akebono, Hideharu Yamamoto, Kota Miura, Hisashi Saito
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Patent number: 8393998Abstract: A hybrid electric vehicle has a first mode in which slippage of a clutch between an electric motor and a driving wheel is allowed and controlled by rotational speed control of the electric motor and a second mode in which the slippage of the clutch is allowed and controlled by rotational speed control of an engine. When the vehicle is stationary in the first mode, a controller reduces a control setpoint of hydraulic pressure of the clutch from an initial point. The controller identifies a reference point of the control setpoint with which actual output torque of the electric motor is substantially constant with respect to the reduction of the control setpoint. Then, the controller increases the control setpoint to a precharge point, and reduces the control setpoint to a corrected point that is lower than or substantially equal to the initial point and higher than the reference point.Type: GrantFiled: October 28, 2011Date of Patent: March 12, 2013Assignee: Jatco LtdInventors: Hiromichi Akebono, Hideharu Yamamoto, Kota Miura, Hisashi Saito
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Publication number: 20120203406Abstract: A hybrid electric vehicle has a first mode in which slippage of a clutch between an electric motor and a driving wheel is allowed and controlled by rotational speed control of the electric motor and a second mode in which the slippage of the clutch is allowed and controlled by rotational speed control of an engine. When the vehicle is stationary in the first mode, a controller reduces a control setpoint of hydraulic pressure of the clutch from an initial point. The controller identifies a reference point of the control setpoint with which actual output torque of the electric motor becomes unchanged with respect to the reduction of the control setpoint. Then, the controller increases the control setpoint from the reference point at a higher gradient and then a lower gradient, and then sets the control setpoint to a corrected point below the initial point and above the reference point.Type: ApplicationFiled: January 30, 2012Publication date: August 9, 2012Inventors: Hiromichi AKEBONO, Hideharu YAMAMOTO, Kota MIURA, Hisashi SAITO
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Publication number: 20120108388Abstract: A hybrid electric vehicle has a first mode in which slippage of a clutch between an electric motor and a driving wheel is allowed and controlled by rotational speed control of the electric motor and a second mode in which the slippage of the clutch is allowed and controlled by rotational speed control of an engine. When the vehicle is stationary in the first mode, a controller reduces a control setpoint of hydraulic pressure of the clutch from an initial point. The controller identifies a reference point of the control setpoint with which actual output torque of the electric motor is substantially constant with respect to the reduction of the control setpoint. Then, the controller increases the control setpoint to a precharge point, and reduces the control setpoint to a corrected point that is lower than or substantially equal to the initial point and higher than the reference point.Type: ApplicationFiled: October 28, 2011Publication date: May 3, 2012Inventors: Hiromichi AKEBONO, Hideharu YAMAMOTO, Kota MIURA, Hisashi SAITO
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Publication number: 20120109439Abstract: In control apparatus and method for a vehicle, the vehicle including a traveling mode (a WSC traveling mode) in which a slip control is performed for a clutch (second clutch CL2) and a revolution speed control is performed for the driving source such that a revolution speed at a driving source side of the clutch becomes higher than that at a driving wheel side of the clutch by a predetermined revolution speed, an actual torque of a driving source of the vehicle is detected, a command hydraulic pressure is reduced from an initial command hydraulic pressure and a post-correction command hydraulic pressure is set on a basis of the command hydraulic pressure when a variation in the actual torque of the driving source along with the reduction of the command hydraulic pressure is determined to end, when a vehicle stopped state is determined to occur during the traveling mode.Type: ApplicationFiled: October 28, 2011Publication date: May 3, 2012Inventors: Hiromichi AKEBONO, Hideharu YAMAMOTO, Kota MIURA, Hisashi SAITO
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Publication number: 20120108387Abstract: A hybrid electric vehicle has a first mode in which slippage of a clutch between an electric motor and a driving wheel is allowed and controlled by rotational speed control of the electric motor and a second mode in which the slippage of the clutch is allowed and controlled by rotational speed control of an engine. When the vehicle is stationary in the first mode, a controller reduces a control setpoint of hydraulic pressure of the clutch from an initial point. The controller identifies a reference point of the control setpoint with which actual output torque of the electric motor is substantially constant with respect to the reduction of the control setpoint. Then, the controller increases the control setpoint to a precharge point, and reduces the control setpoint to a corrected point that is lower than or substantially equal to the initial point and higher than the reference point.Type: ApplicationFiled: October 28, 2011Publication date: May 3, 2012Inventors: Hiromichi AKEBONO, Hideharu YAMAMOTO, Kota MIURA, Hisashi SAITO
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Publication number: 20120109438Abstract: A hybrid electric vehicle has a first mode in which slippage of a clutch between an electric motor and a driving wheel is allowed and controlled by rotational speed control of the electric motor and a second mode in which the slippage of the clutch is allowed and controlled by rotational speed control of an engine. When the vehicle is stationary in the first mode, a controller reduces a control setpoint of hydraulic pressure of the clutch from an initial point. The controller identifies a reference point of the control setpoint with which actual output torque of the electric motor is substantially constant with respect to the reduction of the control setpoint. Then, the controller increases the control setpoint to a precharge point, and reduces the control setpoint to a corrected point that is lower than or substantially equal to the initial point and higher than the reference point.Type: ApplicationFiled: October 28, 2011Publication date: May 3, 2012Inventors: Hiromichi AKEBONO, Hideharu Yamamoto, Kota Miura, Hisashi Saito