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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Patent number: 11815177Abstract: The transmission controller is configured to, when the received range position signal indicates that the range position is switched from a travelling range to a neutral range during travelling, output an instruction to disengage all of friction elements that are in an engaged state in the travelling range, output an instruction to at least one friction element before the instruction to disengage all of the friction elements that are in the engaged state in the travelling range is output, confirm a change in a rotation speed of a transmission input shaft after the instruction to disengage is output to the at least one friction element, and when there is no change in the rotation speed, diagnose that the friction element instructed to be disengaged is in an erroneously engaged state in which the friction element is not able to be disengaged.Type: GrantFiled: June 29, 2020Date of Patent: November 14, 2023Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Norihira Amano, Masahiro Hamano
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Patent number: 11754174Abstract: The transmission control unit includes a gear ratio abnormality determination unit and a limp home control unit. The gear ratio abnormality determination unit is configured to determine that a gear ratio is abnormal when, during travelling at a predetermined gear position, a difference between an actual gear ratio, which is calculated based on a transmission input shaft rotation speed and a transmission output shaft rotation speed, and a set gear ratio at the predetermined gear position is equal to or greater than a set value.Type: GrantFiled: November 20, 2020Date of Patent: September 12, 2023Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Norihira Amano, Masahiro Hamano
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Patent number: 11644096Abstract: A diagnosis device determines diagnoses one of primary and secondary board temperature sensors as abnormal, in response to a condition that a state in which a primary temperature sensor value and a secondary temperature sensor value deviate from each other by a predetermined value or more continues for a predetermined duration or more; performs torque limitation to limit a torque inputted from an engine to an automatic transmission, during driving in a predetermined travel section based on a predetermined condition, after the one of the primary and secondary board temperature sensors is diagnosed as abnormal; and performs transmission shift restriction to restrict shifting of the automatic transmission along with the torque limitation, in response to a condition that the one of the primary and secondary board temperature sensors continues to be diagnosed as still abnormal after the driving in the predetermined travel section is completed.Type: GrantFiled: January 22, 2020Date of Patent: May 9, 2023Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Masahiro Hamano, Yasunori Murase
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Patent number: 11536365Abstract: A malfunction part sensing device for an automatic transmission for a vehicle which is arranged to attain a plurality of shift stages by selectively engaging a plurality of frictional engagement elements, the malfunction part sensing device includes: a shift stage monitoring section configured to monitor the shift stages before and after the shift of the automatic transmission; a malfunction sensing section configured to sense the malfunction mode from a behavior of the vehicle which is generated in accordance with the malfunction; and a malfunction part limiting section configured to limit the one of the frictional engagement elements in which the malfunction is generated, based on the malfunction mode and a shift manner by a combination of the shift stages before and after the shift.Type: GrantFiled: February 10, 2017Date of Patent: December 27, 2022Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Yutaka Tooyama, Fumitaka Nagashima, Takateru Kawaguchi, Hideharu Yamamoto, Masahiro Hamano
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Publication number: 20220333683Abstract: The transmission control unit includes a gear ratio abnormality determination unit and a limp home control unit. The gear ratio abnormality determination unit is configured to determine that a gear ratio is abnormal when, during travelling at a predetermined gear position, a difference between an actual gear ratio, which is calculated based on a transmission input shaft rotation speed and a transmission output shaft rotation speed, and a set gear ratio at the predetermined gear position is equal to or greater than a set value.Type: ApplicationFiled: November 20, 2020Publication date: October 20, 2022Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Norihira AMANO, Masahiro HAMANO
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Publication number: 20220243808Abstract: The transmission controller is configured to, when the received range position signal indicates that the range position is switched from a travelling range to a neutral range during travelling, output an instruction to disengage all of friction elements that are in an engaged state in the travelling range, output an instruction to at least one friction element before the instruction to disengage all of the friction elements that are in the engaged state in the travelling range is output, confirm a change in a rotation speed of a transmission input shaft after the instruction to disengage is output to the at least one friction element, and when there is no change in the rotation speed, diagnose that the friction element instructed to be disengaged is in an erroneously engaged state in which the friction element is not able to be disengaged.Type: ApplicationFiled: June 29, 2020Publication date: August 4, 2022Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Norihira AMANO, Masahiro HAMANO
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Publication number: 20220154819Abstract: A diagnosis device determines diagnoses one of primary and secondary board temperature sensors as abnormal, in response to a condition that a state in which a primary temperature sensor value and a secondary temperature sensor value deviate from each other by a predetermined value or more continues for a predetermined duration or more; performs torque limitation to limit a torque inputted from an engine to an automatic transmission, during driving in a predetermined travel section based on a predetermined condition, after the one of the primary and secondary board temperature sensors is diagnosed as abnormal; and performs transmission shift restriction to restrict shifting of the automatic transmission along with the torque limitation, in response to a condition that the one of the primary and secondary board temperature sensors continues to be diagnosed as still abnormal after the driving in the predetermined travel section is completed.Type: ApplicationFiled: January 22, 2020Publication date: May 19, 2022Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Masahiro HAMANO, Yasunori MURASE
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Patent number: 11059475Abstract: An automatic transmission is arranged in a hybrid driveline employing an EV mode and an HEV mode, and establishes transmission ratio positions by engaging or disengaging frictional elements. A system or method includes: determining, based on a vehicle deceleration and a relationship between a requested transmission ratio position and an actual transmission ratio, whether or not interlocking is occurring, when the automatic transmission is in a state out of transmission shifting, wherein the interlocking is due to erroneous engagement of one of the frictional elements; and inhibiting the determination about interlocking, during a period from start of slip of a first frictional element of the automatic transmission to confirmation of convergence of slip of the first frictional element, in a situation that the first frictional element is slip-engaged for starting the engine in response to a request for mode transition from the EV mode to the HEV mode.Type: GrantFiled: July 19, 2018Date of Patent: July 13, 2021Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Masahiro Hamano, Yutaka Tohyama, Norihira Amano
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Publication number: 20210155223Abstract: An automatic transmission is arranged in a hybrid driveline employing an EV mode and an HEV mode, and establishes transmission ratio positions by engaging or disengaging frictional elements. A system or method includes: determining, based on a vehicle deceleration and a relationship between a requested transmission ratio position and an actual transmission ratio, whether or not interlocking is occurring, when the automatic transmission is in a state out of transmission shifting, wherein the interlocking is due to erroneous engagement of one of the frictional elements; and inhibiting the determination about interlocking, during a period from start of slip of a first frictional element of the automatic transmission to confirmation of convergence of slip of the first frictional element, in a situation that the first frictional element is slip-engaged for starting the engine in response to a request for mode transition from the EV mode to the HEV mode.Type: ApplicationFiled: June 19, 2018Publication date: May 27, 2021Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Masahiro HAMANO, Yutaka TOHYAMA, Norihira AMANO
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Patent number: 10753467Abstract: In a transmission control device, a controller determines failure of one of a variator input side rotation sensor and a variator output side 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: GrantFiled: February 9, 2016Date of Patent: August 25, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Haruka Ozono, Masahiro Hamano
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Patent number: 10718390Abstract: Abnormality detection device for automatic transmission of invention has automatic transmission 5A connected to vehicle driving source 1, 3 through clutch 4a; range detector detecting selection range of selector lever 9 and outputting detection signal; manual valve 90 configured to, when selector lever is positioned at drive range position, engage clutch and bring automatic transmission into power transmission state, and when selector lever is positioned at range position except drive range position, disengage clutch and bring automatic transmission into power non-transmission state.Type: GrantFiled: February 16, 2017Date of Patent: July 21, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Junki Matsui, Masahiro Hamano, Norihira Amano
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Patent number: 10704680Abstract: 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: GrantFiled: February 17, 2016Date of Patent: July 7, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Masahiro Hamano, Youji Itou, Kosuke Abe, Haruka Ozono
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Patent number: 10697536Abstract: 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: GrantFiled: February 17, 2016Date of Patent: June 30, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Masahiro Hamano, Youji Itou, Kosuke Abe, Haruka Ozono
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Patent number: 10683928Abstract: 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: GrantFiled: February 9, 2016Date of Patent: June 16, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Haruka Ozono, Masahiro Hamano
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Patent number: 10598277Abstract: 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: GrantFiled: January 27, 2017Date of Patent: March 24, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Norihira Amano, Youji Itou, Masahiro Hamano
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Patent number: 10591053Abstract: 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: GrantFiled: February 17, 2016Date of Patent: March 17, 2020Assignees: 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: 20200025266Abstract: Abnormality detection device for automatic transmission of invention has automatic transmission 5A connected to vehicle driving source 1, 3 through clutch 4a; range detector detecting selection range of selector lever 9 and outputting detection signal; manual valve 90 configured to, when selector lever is positioned at drive range position, engage clutch and bring automatic transmission into power transmission state, and when selector lever is positioned at range position except drive range position, disengage clutch and bring automatic transmission into power non-transmission state.Type: ApplicationFiled: February 16, 2017Publication date: January 23, 2020Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Junki MATSUI, Masahiro HAMANO, Norihira AMANO
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Patent number: 10527163Abstract: 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: GrantFiled: September 14, 2016Date of Patent: January 7, 2020Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Masahiro Hamano, Youji Itou, Haruka Kondo, Norihira Amano
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Patent number: 10371255Abstract: 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: GrantFiled: February 9, 2016Date of Patent: August 6, 2019Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Haruka Ozono, Masahiro Hamano
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Publication number: 20190093761Abstract: A malfunction part sensing device for an automatic transmission for a vehicle which is arranged to attain a plurality of shift stages by selectively engaging a plurality of frictional engagement elements, the malfunction part sensing device includes: a shift stage monitoring section configured to monitor the shift stages before and after the shift of the automatic transmission; a malfunction sensing section configured to sense the malfunction mode from a behavior of the vehicle which is generated in accordance with the malfunction; and a malfunction part limiting section configured to limit the one of the frictional engagement elements in which the malfunction is generated, based on the malfunction mode and a shift manner by a combination of the shift stages before and after the shift.Type: ApplicationFiled: February 10, 2017Publication date: March 28, 2019Applicants: JATCO Ltd, NISSAN MOTOR CO., LTD.Inventors: Yutaka TOOYAMA, Fumitaka NAGASHIMA, Takateru KAWAGUCHI, Hideharu YAMAMOTO, Masahiro HAMANO