Patents by Inventor Takashi Eguchi
Takashi Eguchi 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).
-
Patent number: 9212732Abstract: A target primary pressure and a target secondary pressure are set based on a speed ratio, a target line pressure as a target value of a line pressure is set to be a value obtained by adding an offset amount, as a positive value, to either one having a higher value out of the target primary pressure and the target secondary pressure, in at least a cross-point region as a region where an absolute value of a deviation, obtained by subtracting the target primary pressure from the target secondary pressure, is smaller than a predetermined deviation, and a primary pressure, a secondary pressure, and the line pressure are controlled to be the target primary pressure, the target secondary pressure, and the target line pressure, respectively.Type: GrantFiled: February 21, 2013Date of Patent: December 15, 2015Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Seiichiro Takahashi, Takashi Eguchi, Tomohiro Utagawa, Tomoyuki Mizuochi, Hisao Nobu, Kenji Sakakibara, Takahiro Ikeda, Masayuki Shimizu, Masami Sakai
-
Patent number: 9133930Abstract: A transmission controller determines whether a shift returning to low, changing a speed ratio of a continuously variable transmission to the lowest when a vehicle decelerates, is being performed or not, calculates a primary pressure measured lower limit value at which a belt begins to slip actually, based on a deceleration of the vehicle and the speed ratio of the continuously variable transmission, and sets a lower limit value of a target value of the primary pressure during the shift returning to low as the primary pressure measured lower limit value.Type: GrantFiled: February 21, 2013Date of Patent: September 15, 2015Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Seiichiro Takahashi, Takashi Eguchi, Tomohiro Utagawa, Yuta Ishinabe, Tetsuya Izumi, Takahiro Kobayashi
-
Patent number: 9086144Abstract: A transmission controller detects a rotation speed of an input shaft, calculates an inertia torque input to a continuously variable transmission based on a change ratio of the detected rotation speed, obtains a positive inertia torque by extracting a positive portion from the calculated inertia torque, and corrects pulley pressures based on the extracted positive inertia torque.Type: GrantFiled: February 21, 2013Date of Patent: July 21, 2015Assignees: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Seiichiro Takahashi, Takashi Eguchi, Takahiro Kobayashi
-
Publication number: 20150148157Abstract: A transmission controller determines whether a shift is a kickdown, and when the shift is determined as the kickdown, the target line pressure is increased to a first target pressure corresponding to an input torque to a continuously variable transmission increased by the kickdown; the transmission controller then determines whether the line pressure has reached the first target pressure, and if determined that the line pressure has reached the first target pressure, the target line pressure is increased to a second target pressure higher than the first target pressure.Type: ApplicationFiled: May 28, 2013Publication date: May 28, 2015Applicants: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Seiichiro Takahashi, Takashi Eguchi, Tomohiro Utagawa, Tomoyuki Mizuochi, Hisao Nobu, Kenji Sakakibara, Takahiro Ikeda, Masayuki Shimizu
-
Publication number: 20150148156Abstract: A transmission controller searches a mechanical High, which is a minimum value of a possible speed ratio of the continuously variable transmission (CVT), based on an actual speed ratio, sets a control High lower than the mechanical High by a predetermined amount, and controls a speed ratio of the CVT by setting a minimum value of a speed ratio range of the CVT at the control High.Type: ApplicationFiled: May 28, 2013Publication date: May 28, 2015Applicants: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Yoshio Yasui, Tomoyuki Mizuochi, Seiichiro Takahashi, Takashi Eguchi, Yohei Shimokawa
-
Publication number: 20150075360Abstract: In a hydraulic control circuit including a solenoid valve, whose change responsiveness in an actual pressure with respect to a change in an instructional pressure deteriorates when the instructional pressure enters a dead band region on a lower pressure side than a dead band threshold, for adjusting a hydraulic pressure supplied to a hydraulic device operated by the hydraulic pressure based on the instructional pressure, the instructional pressure is increased in a stepwise manner to a charge pressure higher than the dead band threshold, when the instructional pressure is set in the dead band region and the instructional pressure increases within the dead band region to such an extent that a speed ratio does not change. Then, a lower limit of the instructional pressure is set to the dead band threshold, and use of the dead band region is prohibited for a certain period of time.Type: ApplicationFiled: February 21, 2013Publication date: March 19, 2015Inventors: Seiichiro Takahashi, Takashi Eguchi, Tomohiro Utagawa, Hisao Nobu, Kenji Sakakibara, Takahiro Ikeda, Masayuki Shimizu
-
Publication number: 20150081181Abstract: A transmission controller determines whether a shift returning to low, changing a speed ratio of a continuously variable transmission to the lowest when a vehicle decelerates, is being performed or not, calculates a primary pressure measured lower limit value at which a belt begins to slip actually, based on a deceleration of the vehicle and the speed ratio of the continuously variable transmission, and sets a lower limit value of a target value of the primary pressure during the shift returning to low as the primary pressure measured lower limit value.Type: ApplicationFiled: February 21, 2014Publication date: March 19, 2015Inventors: Seiichiro Takahashi, Takashi Eguchi, Tomohiro Utagawa, Yuta Ishinabe, Tetsuya Izumi, Takahiro Kobayashi
-
Publication number: 20150080156Abstract: A target primary pressure and a target secondary pressure are set based on a speed ratio, a target line pressure as a target value of a line pressure is set to be a value obtained by adding an offset amount, as a positive value, to either one having a higher value out of the target primary pressure and the target secondary pressure, in at least a cross-point region as a region where an absolute value of a deviation, obtained by subtracting the target primary pressure from the target secondary pressure, is smaller than a predetermined deviation, and a primary pressure, a secondary pressure, and the line pressure are controlled to be the target primary pressure, the target secondary pressure, and the target line pressure, respectively.Type: ApplicationFiled: February 21, 2013Publication date: March 19, 2015Applicants: JATCO LTD., NISSAN MOTOR CO., LTD.Inventors: Seiichiro Takahashi, Takashi Eguchi, Tomohiro Utagawa, Tomoyuki Mizuochi, Hisao Nobu, Kenji Sakakibara, Takahiro Ikeda, Masayuki Shimizu, Masami Sakai
-
Publication number: 20150051032Abstract: A transmission controller detects a rotation, speed of an input shaft, calculates an inertia torque input to a continuously variable transmission based on a change ratio of the detected rotation speed, obtains a positive inertia torque by extracting a positive portion from the calculated inertia torque, and corrects pulley pressures based on the extracted positive inertia torque.Type: ApplicationFiled: February 21, 2013Publication date: February 19, 2015Applicants: JATCO LTD, NISSAN MOTOR CO., LTD.Inventors: Seiichiro Takahashi, Takashi Eguchi, Takahiro Kobayashi
-
Patent number: 8818657Abstract: The shift control unit shifts the sub-transmission mechanism while changing the speed ratio of the variator in response to a change in the speed ratio of the sub-transmission mechanism so that the through speed ratio does not change after the through speed ratio is caused to reach the final through speed ratio by changing only the speed ratio of the variator if the speed ratio corresponding to the shift instruction from the driver is between a first speed ratio at which the sub-transmission mechanism is in the second gear position at the high speed side and the speed ratio of the variator is lowest and a second speed ratio at which the sub-transmission mechanism is in the first gear position at the low speed side and the speed ratio of the variator is highest when the manual mode is selected.Type: GrantFiled: August 24, 2011Date of Patent: August 26, 2014Assignee: Jatco LtdInventors: Hiroyasu Tanaka, Masahide Ito, Masato Mori, Takashi Eguchi, Ryousuke Nonomura, Seiichiro Takahashi, Mamiko Inoue
-
Patent number: 8762011Abstract: A control apparatus for a vehicle equipped with continuously-variable transmission includes a drive source; a continuously-variable transmitting mechanism including a primary pulley, a secondary pulley and a power transferring member; a friction engagement element provided between the drive source and the continuously-variable transmitting mechanism; and a vehicle-stop LOW shift control section including a vehicle-stop judging section configured to judge if the vehicle is in a stopped state. A power-transferring state of the friction engagement element is controlled by an engaging-force control. The vehicle-stop LOW shift control section starts a vehicle-stop LOW shift control to shift a pulley ratio of the continuously-variable transmitting mechanism toward LOW side when the vehicle-stop judging section determines that the vehicle is stopped under a power-transferring state where the friction engagement element is in an engaged state and the pulley ratio is not in a LOWEST region.Type: GrantFiled: March 8, 2012Date of Patent: June 24, 2014Assignees: JATCO Ltd, Nissan Motor Co., Ltd.Inventors: Kazuki Ishida, Hiroyasu Tanaka, Yusuke Kimura, Tetsuya Izumi, Akito Suzuki, Takashi Eguchi, Hironori Miyaishi
-
Patent number: 8718883Abstract: In a manual mode, a gear position of a continuously variable transmission is selected based on an input operation from a driver, a final through speed ratio is set based on the selected gear position and a variator and a sub-transmission mechanism are controlled to realize the final through speed ratio. Whether an input torque to the sub-transmission mechanism is positive or negative is determined based on an input torque to the sub-transmission mechanism when the manual mode is selected.Type: GrantFiled: August 24, 2011Date of Patent: May 6, 2014Assignee: Jatco LtdInventors: Hiroyasu Tanaka, Masahide Ito, Masato Mori, Takashi Eguchi, Ryousuke Nonomura, Seiichiro Takahashi, Mamiko Inoue
-
Patent number: 8676454Abstract: The shift control unit executes a control to cause the through speed ratio to follow the final through speed ratio by changing only the speed ratio of the variator if a shift instruction is given from the driver a plurality of times in a row when the manual mode is selected, and advances the start of a change in the speed ratio of the sub-transmission mechanism or accelerates the progression of the change of the speed ratio as compared with the case where the manual mode is not selected when the speed ratio of the variator is maximized or minimized and the through speed ratio cannot follow the final through speed ratio.Type: GrantFiled: August 24, 2011Date of Patent: March 18, 2014Assignee: JATCO LtdInventors: Hiroyasu Tanaka, Masahide Ito, Masato Mori, Takashi Eguchi, Ryousuke Nonomura, Seiichiro Takahashi, Mamiko Inoue
-
Patent number: 8666616Abstract: A transmission control unit reduces a hydraulic pressure of a release-side frictional engagement element which is to be released of a sub-transmission mechanism and reduces this reduction amount as an input torque to the sub-transmission mechanism increases at the time of starting a shift when a manual mode is selected, the input torque is positive and the sub-transmission mechanism is to be shifted down.Type: GrantFiled: August 24, 2011Date of Patent: March 4, 2014Assignee: Jatco LtdInventors: Hiroyasu Tanaka, Masahide Ito, Masato Mori, Takashi Eguchi, Ryousuke Nonomura, Seiichiro Takahashi, Mamiko Inoue
-
Publication number: 20130280571Abstract: A lithium ion secondary battery is disclosed in which an electrode assembly is accommodated in a battery container, the electrode assembly including a positive electrode having a positive electrode mixture layer containing a lithium transition metal composite oxide, a negative electrode having a negative electrode mixture layer for occluding/releasing lithium ions, and a separator disposed to inner and outer peripheries of the positive electrode and the negative electrode. The lithium ion secondary battery being charged with a non-aqueous electrolyte containing a lithium salt, wherein the relation shown by the following formula (I) is satisfied: 0.57<b×c/a<0.60??(I) assuming the area of the positive electrode mixture layer as a, the area of the separator as b, and the porosity of the separator as c.Type: ApplicationFiled: December 15, 2011Publication date: October 24, 2013Applicant: Hitachi Vehicle Energy, Ltd.Inventors: Takashi Eguchi, Katsunori Suzuki, Youshin Yagi
-
Patent number: 8560189Abstract: Continuously variable transmission includes: a variator; a stepwise auxiliary transmission mechanism; and a shift controller configured to set a desired through transmission ratio based on the calculated desired target rotational speed, the shift control section including; a slope road upshift prohibiting section configured to prohibit upshift of the auxiliary transmission mechanism when the vehicle runs on a slope road, and a slope road upshift section configured to upshift the auxiliary transmission mechanism when the vehicle runs in a predetermined running state when the slope road upshift prohibiting section prohibits upshift of the auxiliary transmission mechanism, and to perform the shift of the auxiliary transmission mechanism while the transmission ratio of the variator is varied in accordance with the variation of the transmission ratio of the auxiliary transmission mechanism to prevent varying the through transmission ratio even when the vehicle runs on the slope road.Type: GrantFiled: September 12, 2011Date of Patent: October 15, 2013Assignee: Jatco LtdInventors: Hiroyasu Tanaka, Takuichiro Inoue, Ryousuke Nonomura, Takashi Eguchi, Mamiko Inoue, Seiichiro Takahashi
-
Patent number: 8414453Abstract: An inertia torque input into the continuously variable speed change mechanism from the subtransmission mechanism is estimated during the shift in the subtransmission mechanism. During the shift in the subtransmission mechanism, a required oil pressure, which is an oil pressure required to maintain a contact frictional force between the respective pulleys and the wrapped member, is calculated on the basis of an input torque into the continuously variable speed change mechanism and the inertia torque.Type: GrantFiled: August 24, 2010Date of Patent: April 9, 2013Assignee: Jatco LtdInventors: Ryousuke Nonomura, Takashi Eguchi, Tomohiro Utagawa, Keita Okudaira
-
Publication number: 20120244993Abstract: A control apparatus for a vehicle equipped with continuously-variable transmission includes a drive source; a continuously-variable transmitting mechanism including a primary pulley, a secondary pulley and a power transferring member; a friction engagement element provided between the drive source and the continuously-variable transmitting mechanism; and a vehicle-stop LOW shift control section including a vehicle-stop judging section configured to judge if the vehicle is in a stopped state. A power-transferring state of the friction engagement element is controlled by an engaging-force control. The vehicle-stop LOW shift control section starts a vehicle-stop LOW shift control to shift a pulley ratio of the continuously-variable transmitting mechanism toward LOW side when the vehicle-stop judging section determines that the vehicle is stopped under a power-transferring state where the friction engagement element is in an engaged state and the pulley ratio is not in a LOWEST region.Type: ApplicationFiled: March 8, 2012Publication date: September 27, 2012Inventors: Kazuki ISHIDA, Hiroyasu Tanaka, Yusuke Kimura, Tetsuya Izumi, Akito Suzuki, Takashi Eguchi, Hironori Miyaishi
-
Patent number: 8180524Abstract: In diagnosis apparatus and method for diagnosing a vehicle antenna, the vehicle antenna performing transmission and reception of electric waves to and from a portable unit, the vehicle antenna is driven to perform communications with the portable unit when a first condition is satisfied and the vehicle antenna is driven to perform a diagnosis of a connection state of the vehicle antenna when a second condition is satisfied. The first condition is different from the second condition.Type: GrantFiled: July 5, 2007Date of Patent: May 15, 2012Assignee: Nissan Motor Co., Ltd.Inventor: Takashi Eguchi
-
Publication number: 20120083977Abstract: Continuously variable transmission includes: a variator; a stepwise auxiliary transmission mechanism; and a shift controller configured to set a desired through transmission ratio based on the calculated desired target rotational speed, the shift control section including; a slope road upshift prohibiting section configured to prohibit upshift of the auxiliary transmission mechanism when the vehicle runs on a slope road, and a slope road upshift section configured to upshift the auxiliary transmission mechanism when the vehicle runs in a predetermined running state when the slope road upshift prohibiting section prohibits upshift of the auxiliary transmission mechanism, and to perform the shift of the auxiliary transmission mechanism while the transmission ratio of the variator is varied in accordance with the variation of the transmission ratio of the auxiliary transmission mechanism to prevent varying the through transmission ratio even when the vehicle runs on the slope road.Type: ApplicationFiled: September 12, 2011Publication date: April 5, 2012Inventors: Hiroyasu TANAKA, Takuichiro Inoue, Ryousuke Nonomura, Takashi Eguchi, Mamiko Inoue, Seiichiro Takahashi