Patents by Inventor Masahiro Hamano
Masahiro Hamano 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: 20190040949Abstract: In a vehicle in which a continuously variable transmission, which is connected to an electric motor via a clutch, is operated using oil pressure of an oil pump driven by the motor, erroneous engagement of the clutch is quickly determined. The vehicle has the motor serving as a vehicle driving source, the oil pump connected to the motor, the continuously variable transmission, the clutch interposed between the motor and the continuously variable transmission, a clutch control means for controlling the clutch such that the clutch enters into a completely-engaged, slip-engaged, or release state, and a vehicle control means for controlling the motor such that the motor rotates at a target rotation speed. Also provided is an erroneous engagement handling control means that executes torque adjustment control to decrease an output torque of the vehicle driving source when the clutch is determined to be in an erroneously completely engaged state.Type: ApplicationFiled: January 27, 2017Publication date: February 7, 2019Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Norihira AMANO, Youji ITOU, Masahiro HAMANO
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Publication number: 20180283540Abstract: The present invention is a control device for an automatic transmission, the control device being adapted to control the automatic transmission including a torque converter and a stepped transmission mechanism provided on a power transmission route from the torque converter to drive wheels, wherein while a non-driving range of the automatic transmission is selected, determination on interlock in the stepped transmission mechanism is executed on the basis of deceleration of an output shaft of the stepped transmission mechanism and a change in the torque converter.Type: ApplicationFiled: September 14, 2016Publication date: October 4, 2018Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Masahiro HAMANO, Youji ITOU, Haruka KONDO, Norihira AMANO
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Publication number: 20180274672Abstract: A controller is a control device for a transmission, the transmission provided in a vehicle and having a variator and a rotation sensor. The controller decides electrical abnormality of the rotation sensor when an electrical abnormality detection state of the rotation sensor is continued for a set time. The controller also decides functional abnormality of the rotation sensor when rotation speed is included in an abnormality detection region of the functional abnormality, and inhibits a decision on the functional abnormality during counting of the set time.Type: ApplicationFiled: September 13, 2016Publication date: September 27, 2018Applicant: NISSAN MOTOR CO., LTD.Inventors: Haruka KONDO, Youji ITOU, Masahiro HAMANO, Norihira AMANO
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Publication number: 20180245687Abstract: In a transmission control device, a controller determines failure of a rotation sensor. A hydraulic control circuit and the controller variably control a speed ratio of a variator. The hydraulic control circuit and the controller variably control a gear position of a sub-transmission mechanism, and in a case where the failure is determined, fix the gear position of the sub-transmission mechanism to first speed. The hydraulic control circuit and the controller fix the gear position of the sub-transmission mechanism to the first speed during a vehicle stop in a case where the gear position of the sub-transmission mechanism upon a determination of the failure is second speed.Type: ApplicationFiled: February 9, 2016Publication date: August 30, 2018Applicants: JACTCO Ltd., Nissan Motor Co., Ltd.Inventors: Haruka OZONO, Masahiro HAMANO
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Publication number: 20180245686Abstract: In a transmission control device for controlling a transmission, a controller determines failure of a SOL corresponding to a hydraulic secondary-pressure actuator. The controller variably controls line command pressure, and in a case where the failure is determined, fixes the line command pressure to a line pressure set value. The controller variably controls primary command pressure, and in a case where the failure is determined, continuously changes a speed ratio of a variator by variably controlling the primary command pressure. The controller variably controls secondary command pressure, and in a case where the failure is determined, fixes the secondary command pressure to a secondary pressure set value.Type: ApplicationFiled: February 17, 2016Publication date: August 30, 2018Applicants: JATCO Ltd, Nissan Motor Co., Ltd.Inventors: Masahiro HAMANO, Youji ITOU, Kosuke ABE, Haruka OZONO
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Publication number: 20180106368Abstract: A failure judgment device of an automatic transmission includes: a first abnormality judging section configured to judge a power supply fault abnormality or a breaking abnormality of the solenoid, from a selected shift stage and a state of the transmission mechanism, after the detection of the electric abnormality; and a second abnormality judging section configured to judge the power supply abnormality or the breaking abnormality of the solenoid, from the monitor current value when the solenoid valve is switched to an OFF state, after the detection of the electric abnormality, when one of the first abnormality judging section and the second abnormality judging section judges the power supply fault abnormality or the breaking abnormality, the judgement result being outputted.Type: ApplicationFiled: February 17, 2016Publication date: April 19, 2018Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Hajime TASAKA, Youji ITOU, Masahiro HAMANO, Naonori IIZUKA, Norihira AMANO, Heo Chang MOO
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Publication number: 20180080549Abstract: In a transmission control device, a controller determines failure of one of a rotation sensor and a rotation sensor. A hydraulic control circuit and the controller variably control line pressure, and in a case where the failure is determined, fix the line pressure to a predetermined value or more. The hydraulic control circuit and the controller variably control a speed ratio of a variator by a double pressure regulation method, and in a case where the failure is determined, variably control the speed ratio of the variator by a single pressure regulation method.Type: ApplicationFiled: February 9, 2016Publication date: March 22, 2018Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Haruka OZONO, Masahiro HAMANO
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Publication number: 20180080547Abstract: In a transmission control device for controlling a transmission, a controller determines failure of a SOL corresponding to a hydraulic primary-pressure actuator. The controller variably controls line command pressure, and in a case where the failure is determined, continuously changes a speed ratio of a variator by variably controlling the line command pressure. The controller variably controls primary command pressure, and in a case where the failure is determined, fixes the primary command pressure to a primary pressure set value. The controller variably controls secondary command pressure, and in a case where the failure is determined, fixes the secondary command pressure to a secondary pressure set value.Type: ApplicationFiled: February 17, 2016Publication date: March 22, 2018Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Masahiro HAMANO, Youji ITOU, Kosuke ABE, Haruka OZONO
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Publication number: 20180066751Abstract: In a transmission control device, a controller determines failure of a rotation sensor. A hydraulic control circuit and the controller variably control a speed ratio of a variator, and in a case where the failure is determined, execute first control of restricting a shift range of the variator. The hydraulic control circuit and the controller variably control a gear position of a sub-transmission mechanism, and in a case where the failure is determined, execute second control of fixing the gear position of the sub-transmission mechanism to first speed. The hydraulic control circuit and the controller execute the second control at a different timing from the first control in a case where the gear position of the sub-transmission mechanism upon a determination of the failure is second speed.Type: ApplicationFiled: February 9, 2016Publication date: March 8, 2018Applicants: JATCO Ltd., NISSAN MOTOR CO., LTD.Inventors: Haruka OZONO, Masahiro HAMANO
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Patent number: 8788165Abstract: An abnormal state diagnosis method for an automatic transmission oil temperature sensor includes: a warm-up judging step of judging whether a sensor value from an engine side temperature sensor in an engine warm-up state indicates the engine warm-up state; a sensor normal operation judgment step of starting to judge whether the engine side temperature sensor including the warm-up judgment result normally performs a temperature detection operation; a provisional judgment step of judging whether an upper or lower deviation width between the sensor value of the engine side temperature sensor and an oil temperature sensor value from an automatic transmission oil temperature sensor is equal to or smaller than a predetermined threshold value; and a final judgment step of determining the judgment result by the provisional judgment step when the automatic transmission control unit receives a permission signal from the engine control module.Type: GrantFiled: November 6, 2012Date of Patent: July 22, 2014Assignee: JATCO LtdInventors: Yasuhiko Yuyama, Hajime Tasaka, Masahiro Hamano
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Patent number: 8532893Abstract: In an automatic transmission with a speed changer having a plurality of engagement elements and configured to shift the speed changer into a selected one of a plurality of shift stages by switching engaged and disengaged states of the engagement elements, a first rotation sensor is provided for detecting input rotation of the speed changer and a second rotation sensor for detecting output rotation of the speed changer. Also provided is a transmission controller configured to determine whether a change in input torque inputted into the speed changer occurs. The transmission controller is further configured to determine that interlock has occurred in the speed changer, when there is no pulse signal output from the second rotation sensor though, during a vehicle stopped state, the input-torque change has occurred and the pulse signal from the first rotation sensor has been outputted.Type: GrantFiled: June 6, 2011Date of Patent: September 10, 2013Assignee: Jatco LtdInventors: Yutaka Tohyama, Hideharu Yamamoto, Masahiro Hamano, Hiroyasu Tanaka, Youhei Ishikawa
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Patent number: 8460157Abstract: In torque down control apparatus and method for an automotive vehicle, an upper limit value of a drive force of a prime mover is reduced to a predetermined value when a predetermined condition is established, the upper limit value of the drive force is increased at a predetermined speed to recover the upper limit value of the drive force from the predetermined value, the recovery is limited when an accelerator opening angle is smaller than a predetermined opening angle than a case where the accelerator opening angle is equal to or larger than the predetermined opening angle during the recovery of the upper limit value of the drive force, and the limitation is relieved when a vehicle speed is equal to or higher than a predetermined vehicle speed than a case where the vehicle speed is lower than the predetermined vehicle speed.Type: GrantFiled: June 6, 2011Date of Patent: June 11, 2013Assignee: Jatco LtdInventors: Hajime Tasaka, Yutaka Tohyama, Masahiro Hamano
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Publication number: 20120143448Abstract: In an automatic transmission with a speed changer having a plurality of engagement elements and configured to shift the speed changer into a selected one of a plurality of shift stages by switching engaged and disengaged states of the engagement elements, a first rotation sensor is provided for detecting input rotation of the speed changer and a second rotation sensor for detecting output rotation of the speed changer. Also provided is a transmission controller configured to determine whether a change in input torque inputted into the speed changer occurs. The transmission controller is further configured to determine that interlock has occurred in the speed changer, when there is no pulse signal output from the second rotation sensor though, during a vehicle stopped state, the input-torque change has occurred and the pulse signal from the first rotation sensor has been outputted.Type: ApplicationFiled: June 6, 2011Publication date: June 7, 2012Inventors: Yutaka TOHYAMA, Hideharu Yamamoto, Masahiro Hamano, Hiroyasu Tanaka, Youhei Ishikawa
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Publication number: 20120021870Abstract: In torque down control apparatus and method for an automotive vehicle, an upper limit value of a drive force of a prime mover is reduced to a predetermined value when a predetermined condition is established, the upper limit value of the drive force is increased at a predetermined speed to recover the upper limit value of the drive force from the predetermined value, the recovery is limited when an accelerator opening angle is smaller than a predetermined opening angle than a case where the accelerator opening angle is equal to or larger than the predetermined opening angle during the recovery of the upper limit value of the drive force, and the limitation is relieved when a vehicle speed is equal to or higher than a predetermined vehicle speed than a case where the vehicle speed is lower than the predetermined vehicle speed.Type: ApplicationFiled: June 6, 2011Publication date: January 26, 2012Inventors: Hajime Tasaka, Yutaka Tohyama, Masahiro Hamano
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Patent number: 7434916Abstract: Disclosed is a liquid ejection head capable of performing a stable ejection operation at high speed even when thermal expansion of a valve supporting member occurs during liquid ejection. This is because the liquid ejection head allows the thermal expansion to influence supported valves only to a small extent, and a highly accurate and stable adhesion state to be obtained. To this end, first holes, second holes and slits are provided in the valve supporting member.Type: GrantFiled: February 26, 2007Date of Patent: October 14, 2008Assignee: Canon Finetech Inc.Inventors: Kayo Mukai, Masahiro Hamano
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Publication number: 20070206063Abstract: Disclosed is a liquid ejection head capable of performing a stable ejection operation at high speed even when thermal expansion of a valve supporting member occurs during liquid ejection. This is because the liquid ejection head allows the thermal expansion to influence supported valves only to a small extent, and a highly accurate and stable adhesion state to be obtained. To this end, first holes, second holes and slits are provided in the valve supporting member.Type: ApplicationFiled: February 26, 2007Publication date: September 6, 2007Applicant: CANON FINETECH INC.Inventors: Kayo MUKAI, Masahiro Hamano
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Patent number: 7220214Abstract: A shift control system for an automatic transmission. The shift control system includes an oil temperature sensor, a hydraulic controller to operate a hydraulic clutch, and a control unit in operative communication with the oil temperature sensor and the hydraulic controller. When a gear shift is requested just after an engine restart, the control unit controls the hydraulic clutch with an adjusted shift control process, in contrast to a normal condition of the engine. This adjustment is determined based on a first oil temperature at a time point when the engine is last stopped and on a temperature difference between the first oil temperature and a second oil temperature at a time point when the engine is last restarted after the last engine stop.Type: GrantFiled: March 14, 2005Date of Patent: May 22, 2007Assignee: JATCO LtdInventors: Ikuhiro Iwamoto, Katsutoshi Usuki, Masahiro Hamano, Yoichi Furuichi
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Patent number: 7010405Abstract: A shift control system for an automatic transmission wherein shifting from a first gear ratio to a second gear ratio is carried out by releasing the hydraulic pressure of a first friction engaging element for disengagement thereof and supplying the hydraulic pressure to a second friction engaging element for engagement thereof, the hydraulic pressure to the second friction engaging element being subjected to feedback control, wherein the shift control system includes a sensor for sensing a parameter on a vehicle cruising condition; and an ECU having a part for calculating, in accordance with the sensed parameter, a difference in output-side rotational speed of the fluid coupling before and after the shifting; and a part for setting, when the shifting is carried out with an output of the engine being smaller than a predetermined value, the second hydraulic pressure in accordance with the calculated difference immediately before start of the feedback control.Type: GrantFiled: February 10, 2004Date of Patent: March 7, 2006Assignee: Jatco LTDInventors: Yoichi Furuichi, Yuki Ono, Masahiro Hamano, Yuichi Imamura
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Patent number: 7006907Abstract: In control apparatus and method for an automatic transmission, an initial hydraulic reference value is calculated which provides a reference value of an initial hydraulic from a shift kind and a throttle opening angle or from the parameter value corresponding to the throttle opening angle and a correction quantity is calculated for the reference value of the initial hydraulic on the basis of squares of a revolution speed of a piston calculated and of the revolution speed of the piston detected, the initial hydraulic reference value being set to the initial hydraulic during the ordinary gear shift and the initial hydraulic reference value being corrected by a correction quantity to set the corrected initial hydraulic reference value to the initial hydraulic when the gear shift to a predetermined target gear shift stage is carried out at a drive point different from during the ordinary gear shift.Type: GrantFiled: March 23, 2005Date of Patent: February 28, 2006Assignee: JATCO LTDInventors: Katsutoshi Usuki, Yuzo Yano, Toshinori Ishii, Masahiro Hamano, Yuichi Imamura, Mitsuo Kunou
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Publication number: 20050222735Abstract: In control apparatus and method for an automatic transmission, an initial hydraulic reference value is calculated which provides a reference value of an initial hydraulic from a shift kind and a throttle opening angle or from the parameter value corresponding to the throttle opening angle and a correction quantity is calculated for the reference value of the initial hydraulic on the basis of squares of a revolution speed of a piston calculated and of the revolution speed of the piston detected, the initial hydraulic reference value being set to the initial hydraulic during the ordinary gear shift and the initial hydraulic reference value being corrected by a correction quantity to set the corrected initial hydraulic reference value to the initial hydraulic when the gear shift to a predetermined target gear shift stage is carried out at a drive point different from during the ordinary gear shift.Type: ApplicationFiled: March 23, 2005Publication date: October 6, 2005Inventors: Katsutoshi Usuki, Yuzo Yano, Toshinori Ishii, Masahiro Hamano, Yuichi Imamura, Mitsuo Kunou