Patents by Inventor Akitomo Suzuki
Akitomo Suzuki 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: 20150377336Abstract: A drive plate includes a plate section coupled to a crankshaft of an engine and a rim section including a plurality of teeth that meshes with a pinon gear of a cell motor for cranking the engine. The plate section and the rim section are integrally molded by press working the drive plate in an axial direction. A free end on a side opposite to a base end which is connected to the plate section of the rim section is brought closer than the base end to a central axis of the plate section, that is, the drive plate.Type: ApplicationFiled: March 14, 2014Publication date: December 31, 2015Applicant: AISIN AW CO., LTD.Inventors: Naohisa MOMIYAMA, Akitomo SUZUKI, Ken SHIMIZU, Takamitsu KUROYANAGI, Kenta ITAYAMA, Motoaki KAMIMURA, Sachio HONJO, Tetsuya OTSUBO, Tatsushi OKUDA, Yoshitomo IZAWA, Tsuyoshi AOYAMA, Hiroshi SHIBATA, Gen HAMADA, Masahiro NAKAMURA
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Patent number: 9157544Abstract: A valve section that functions as a solenoid valve device that includes a pressure adjusting section that adjusts fluid pressure supplied from a fluid pressure source; a pump section that sucks and discharges working fluid in a reservoir; and a single solenoid section that drives the pressure adjusting section and the pump section.Type: GrantFiled: May 26, 2009Date of Patent: October 13, 2015Assignee: AISIN AW CO., LTD.Inventors: Tetsuya Shimizu, Kazuhiko Kato, Naoyuki Fukaya, Kazunori Ishikawa, Kenichi Tsuchida, Akitomo Suzuki, Noriomi Fujii
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Patent number: 8670908Abstract: An automatic transmission including an input shaft connected to a drive source; an output shaft connected to a driving wheel; a one-way clutch; friction engagement elements which establish speeds by changing a transmission path between the input shaft and the output shaft based on the application state of the friction engagement elements and application of the one-way clutch, one of the friction engagement elements being a brake that is applied when coasting in a take-off speed. The automatic transmission also includes a controller that determines whether it is possible to initially establish the take-off speed using the one-way clutch based on a predetermined condition, and, if not possible, then the controller establishes the take-off speed by applying the brake.Type: GrantFiled: September 30, 2009Date of Patent: March 11, 2014Assignee: Aisin AW Co., Ltd.Inventors: Tetsuya Shimizu, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa, Masamichi Yamaguchi
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Patent number: 8543299Abstract: An exemplary control device includes an input torque detection unit that detects an input torque input to the input shaft; and a controller that: determines torque distribution of two of the friction engagement elements that form the shift speeds; and calculates a transmission torque of the two friction engagement elements based on the input torque and the torque distribution and sets the engagement pressure to obtain a torque capacity that can transmit the transmission torque, wherein the controller sets the engagement pressure such that slippage does not occur in the two friction engagement elements in a state where engagement of the two friction engagement elements forms the shift speeds and such that, even if an additional friction engagement element engages based on the line pressure while the two friction engagement elements are engaged, one of the three friction engagement elements is caused to slip.Type: GrantFiled: July 24, 2012Date of Patent: September 24, 2013Assignee: Aisin AW Co., Ltd.Inventors: Tetsuya Shimizu, Masamichi Yamaguchi, Satoshi Nishio, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa, Shin-ichirou Murakami
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Publication number: 20120290180Abstract: An exemplary control device includes an input torque detection unit that detects an input torque input to the input shaft; and a controller that: determines torque distribution of two of the friction engagement elements that form the shift speeds; and calculates a transmission torque of the two friction engagement elements based on the input torque and the torque distribution and sets the engagement pressure to obtain a torque capacity that can transmit the transmission torque, wherein the controller sets the engagement pressure such that slippage does not occur in the two friction engagement elements in a state where engagement of the two friction engagement elements forms the shift speeds and such that, even if an additional friction engagement element engages based on the line pressure while the two friction engagement elements are engaged, one of the three friction engagement elements is caused to slip.Type: ApplicationFiled: July 24, 2012Publication date: November 15, 2012Applicant: AISIN AW CO., LTD.Inventors: Tetsuya SHIMIZU, Masamichi YAMAGUCHI, Satoshi NISHIO, Kenichi TSUCHIDA, Akitomo SUZUKI, Kazunori ISHIKAWA, Shin-ichirou MURAKAMI
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Patent number: 8308612Abstract: A drive unit that includes a solenoid device that includes: a solenoid section having a movable portion that abuts on a case to arrive at an initial state when de-energized; a pump section axially sliding in association with a movement of the movable portion by an electromagnetic force of the solenoid section and pumping a hydraulic fluid by reciprocation; and an elastic member biasing the pump section in a direction counter to the electromagnetic force of the solenoid section; and a control unit that controls the solenoid device so that a current applied to the solenoid section is repeatedly increased and decreased between an upper limit value and a lower limit value that is greater than 0.Type: GrantFiled: July 30, 2009Date of Patent: November 13, 2012Assignee: Aisin Aw Co., Ltd.Inventors: Tetsuya Shimizu, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa, Kazuhiko Kato
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Patent number: 8255128Abstract: An exemplary control device includes an input torque detection unit that detects an input torque input to the input shaft; and a controller that: determines torque distribution of two of the friction engagement elements that form the shift speeds; and calculates a transmission torque of the two friction engagement elements based on the input torque and the torque distribution and sets the engagement pressure to obtain a torque capacity that can transmit the transmission torque, wherein the controller sets the engagement pressure such that slippage does not occur in the two friction engagement elements in a state where engagement of the two friction engagement elements forms the shift speeds and such that, even if an additional friction engagement element engages based on the line pressure while the two friction engagement elements are engaged, one of the three friction engagement elements is caused to slip.Type: GrantFiled: December 17, 2008Date of Patent: August 28, 2012Assignee: Aisin AW Co., Ltd.Inventors: Tetsuya Shimizu, Masamichi Yamaguchi, Satoshi Nishio, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa, Shin-ichirou Murakami
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Patent number: 8182397Abstract: A hydraulic control apparatus for an automatic transmission includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a preliminary shift speed switch valve, and an oil pressure supply switch valve, which is switched between a normal-state position where the first, second, and third working fluid pressures can be supplied to the hydraulic servos of the first, second, and third friction engagement elements, respectively, and a failure-state position where the first and second preliminary oil pressures can be supplied to the hydraulic servos of the first and second friction engagement elements, respectively, and a line pressure can be supplied to the hydraulic servo of the third friction engagement element, during a failure that causes de-energization.Type: GrantFiled: September 25, 2009Date of Patent: May 22, 2012Assignee: Aisin AW Co., Ltd.Inventors: Tetsuya Shimizu, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa
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Patent number: 7993231Abstract: A hydraulic control device for an automatic transmission includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a preliminary shift speed switching valve, and a hydraulic pressure supply switching valve. A second friction engagement element is engaged at high speed side shift speeds, a low speed that is one of low speed side shift speeds is achieved by engagement of a first friction engagement element and a third friction engagement element, and a high speed that is one of the high speed side shift speeds is achieved by engagement of a second friction engagement element and the third friction engagement element.Type: GrantFiled: November 28, 2008Date of Patent: August 9, 2011Assignee: Aisin AW Co., Ltd.Inventors: Tetsuya Shimizu, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa, Masamichi Yamaguchi, Satoshi Nishio
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Patent number: 7967028Abstract: A valve assembly includes a plurality of solenoid valves, each solenoid valve having a pressure-regulating valve portion formed by a sleeve having a plurality of valve-side ports and a spool for opening and closing the valve-side ports, and a solenoid portion having a plunger for driving the spool and a coil for electromagnetically driving the plunger; and a valve body having a plurality of insertion holes into which the solenoid valves are inserted, and having ports that are connected to the plurality of valve-side ports in a state in which the solenoid valves are mounted.Type: GrantFiled: November 17, 2008Date of Patent: June 28, 2011Assignee: Aisin AW Co., Ltd.Inventors: Tomoya Jinno, Tetsuya Shimizu, Kenichi Tsuchida, Masamichi Yamaguchi, Satoshi Nishio, Akitomo Suzuki, Kazunori Ishikawa
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Patent number: 7951034Abstract: In a condition of a vehicle which remains stationary or is about to stop and of a forward second speed having a clutch and a brake engaged, an N range is changed from a D range based on a shift lever operation and a forward range pressure is discharged from a manual shift valve. At this time, an orifice and a check ball are used to delay discharge of oil paths which communicate with a linear solenoid valve relative to discharge of an oil path a1 which communicates with a linear solenoid valve. Specifically, release of the brake is delayed relative to release of the clutch, so that a shift by way of a forward first speed through engagement of a one-way clutch can be prevented.Type: GrantFiled: December 1, 2008Date of Patent: May 31, 2011Assignee: Aisin AW Co., Ltd.Inventors: Tetsuya Shimizu, Kenichi Tsuchida, Masamichi Yamaguchi, Satoshi Nishio, Akitomo Suzuki, Kazunori Ishikawa
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Publication number: 20110066339Abstract: An automatic transmission including an input shaft connected to a drive source; an output shaft connected to a driving wheel; a one-way clutch; friction engagement elements which establish speeds by changing a transmission path between the input shaft and the output shaft based on the application state of the friction engagement elements and application of the one-way clutch, one of the friction engagement elements being a brake that is applied when coasting in a take-off speed. The automatic transmission also includes a controller that determines whether it is possible to initially establish the take-off speed using the one-way clutch based on a predetermined condition, and, if not possible, then the controller establishes the take-off speed by applying the brake.Type: ApplicationFiled: September 30, 2009Publication date: March 17, 2011Inventors: Tetsuya Shimizu, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa, Masamichi Yamaguchi
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Patent number: 7775336Abstract: Lubricating oil supply holes are drilled into a first member that is fitted to a plurality of first annular plates by a spline. Of splines to which each lubricating oil supply hole corresponds, lubricating oil grooves provided in the plurality of first annular plates do not overlap the splines on at least one of the front and rear surfaces of the first annular plates, and therefore lubricating oil flowing out of the lubricating oil supply holes is dispersed in a circumferential direction and flows from the inner periphery to the outer periphery of the first annular plates, rather than gathering in each lubricating oil groove and flowing in an outer peripheral direction. As a result, a force generated by an axial lubricating oil flow, which acts in a direction for causing the second annular plates to contact friction materials on the first annular plates, is suppressed, leading to a reduction in drag torque.Type: GrantFiled: February 8, 2007Date of Patent: August 17, 2010Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki Kaisha, Aishin Kako Kabushiki KaishaInventors: Masaaki Nishida, Satoru Kasuya, Masashi Kito, Yoshihisa Yamamoto, Akitomo Suzuki, Masato Fujikawa, Ryuji Ibaraki, Masatoshi Adachi, Tsuyoshi Mikami, Hideo Ono
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Publication number: 20100081545Abstract: A hydraulic control apparatus for an automatic transmission includes a first solenoid valve, a second solenoid valve, a third solenoid valve, a preliminary shift speed switch valve, and an oil pressure supply switch valve, which is switched between a normal-state position where the first, second, and third working fluid pressures can be supplied to the hydraulic servos of the first, second, and third friction engagement elements, respectively, and a failure-state position where the first and second preliminary oil pressures can be supplied to the hydraulic servos of the first and second friction engagement elements, respectively, and a line pressure can be supplied to the hydraulic servo of the third friction engagement element, during a failure that causes de-energization.Type: ApplicationFiled: September 25, 2009Publication date: April 1, 2010Applicant: AISIN AW CO., LTD.Inventors: Tetsuya Shimizu, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa
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Publication number: 20100028168Abstract: A drive unit that includes a solenoid device that includes: a solenoid section having a movable portion that abuts on a case to arrive at an initial state when de-energized; a pump section axially sliding in association with a movement of the movable portion by an electromagnetic force of the solenoid section and pumping a hydraulic fluid by reciprocation; and an elastic member biasing the pump section in a direction counter to the electromagnetic force of the solenoid section; and a control unit that controls the solenoid device so that a current applied to the solenoid section is repeatedly increased and decreased between an upper limit value and a lower limit value that is greater than 0.Type: ApplicationFiled: July 30, 2009Publication date: February 4, 2010Applicant: AISIN AW CO., LTD.Inventors: Tetsuya Shimizu, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa, Kazuhiko Kato
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Publication number: 20090301588Abstract: A valve section that functions as a solenoid valve device that includes a pressure adjusting section that adjusts fluid pressure supplied from a fluid pressure source; a pump section that sucks and discharges working fluid in a reservoir; and a single solenoid section that drives the pressure adjusting section and the pump section.Type: ApplicationFiled: May 26, 2009Publication date: December 10, 2009Applicant: AISIN AW CO., LTD.Inventors: Tetsuya Shimizu, Kazuhiko Kato, Naoyuki Fukaya, Kazunori Ishikawa, Kenichi Tsuchida, Akitomo Suzuki, Noriomi Fujii
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Publication number: 20090280957Abstract: A hydraulic control device of an automatic transmission having a pick up unit of a feedback oil passage that is provided in a line pressure oil passage branched from an oil passage communicating an oil pressure source and a pressure regulating port with each other. An influence of an oil pump on a feedback pressure is thus reduced, and a primary regulator valve regulates an oil pressure to a stable line pressure having a small amount of rising. This structure prevents instability of the feedback pressure due to the influence of the oil pump which is caused in the case where a feedback pressure of a primary regulator valve is directly obtained from an oil passage communicating from an oil pressure source to a pressure regulating port.Type: ApplicationFiled: October 16, 2008Publication date: November 12, 2009Applicant: AISIN AW CO., LTDInventors: Tetsuya Shimizu, Kenichi Tsuchida, Masamichi Yamaguchi, Satoshi Nishio, Akitomo Suzuki, Kazunori Ishikama
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Publication number: 20090171545Abstract: An exemplary control device includes an input torque detection unit that detects an input torque input to the input shaft; and a controller that: determines torque distribution of two of the friction engagement elements that form the shift speeds; and calculates a transmission torque of the two friction engagement elements based on the input torque and the torque distribution and sets the engagement pressure to obtain a torque capacity that can transmit the transmission torque, wherein the controller sets the engagement pressure such that slippage does not occur in the two friction engagement elements in a state where engagement of the two friction engagement elements forms the shift speeds and such that, even if an additional friction engagement element engages based on the line pressure while the two friction engagement elements are engaged, one of the three friction engagement elements is caused to slip.Type: ApplicationFiled: December 17, 2008Publication date: July 2, 2009Applicant: AISIN AW CO., LTD.Inventors: Tetsuya Shimizu, Masamichi Yamaguchi, Satoshi Nishio, Kenichi Tsuchida, Akitomo Suzuki, Kazunori Ishikawa, Shin-ichirou Murakami
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Publication number: 20090143181Abstract: In a condition of a vehicle which remains stationary or is about to stop and of a forward second speed having a clutch and a brake engaged, an N range is changed from a D range based on a shift lever operation and a forward range pressure is discharged from a manual shift valve. At this time, an orifice and a check ball are used to delay discharge of oil paths which communicate with a linear solenoid valve relative to discharge of an oil path a1 which communicates with a linear solenoid valve. Specifically, release of the brake is delayed relative to release of the clutch, so that a shift by way of a forward first speed through engagement of a one-way clutch can be prevented.Type: ApplicationFiled: December 1, 2008Publication date: June 4, 2009Applicant: AISIN AW CO., LTD.Inventors: Tetsuya Shimizu, Kenichi Tsuchida, Masamichi Yamaguchi, Satoshi Nishio, Akitomo Suzuki, Kazunori Ishikawa
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Publication number: 20090139818Abstract: In sliding engagement of a clutch plate of a lock-up clutch with a front cover of a converter housing, with a difference in rotational speed therebetween, the sum of the urging force of a coil spring and the force of a lock-up discharge hydraulic pressure in a front side chamber is greater than the force of a lock-up engagement pressure in a rear side chamber. A selector valve member, accommodated in a valve chamber of a displacement selector mechanism, therefore, brings an oil chamber between the clutch plate (first piston) and a second piston into communication with the front side chamber. The hydraulic pressure of the rear side chamber received by a rear face of the piston is higher than hydraulic pressure of the oil chamber received by a front face of the piston and, therefore, the piston is displaced forwardly into frictional contact with the clutch plate and transmission of judder to an input shaft of a speed change mechanism is thereby reduced.Type: ApplicationFiled: November 20, 2008Publication date: June 4, 2009Applicant: AISIN AW CO. , LTD. ,Inventors: Kazunori Ishikawa, Akitomo Suzuki, Kazuyoshi Ito, Takamitsu Kuroyanagi, Hiroki Nagai