Patents by Inventor Kenichi Tsuchida
Kenichi Tsuchida 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: 20110174107Abstract: A manual valve is formed with a drain input port that closes if a shift is made to the D position, and opens for draining if a shift is made to the N position. A switching valve communicates an output port of a pressure regulating valve portion and an oil passage of a clutch and closes a drain port during engine operation when a line pressure is applied, and cuts off communication between the output port of the pressure regulating valve portion and the oil passage of the clutch and communicates the oil passage with the drain port during an engine automatic stop when the line pressure is not applied. The drain input port and the drain port are connected by a drain oil passage.Type: ApplicationFiled: December 16, 2009Publication date: July 21, 2011Applicant: AISIN AW CO., LTD.Inventors: Tetsuya Shimizu, Kazuhiko Kato, Kenichi Tsuchida, Kazunori Ishikawa
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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: 20110088990Abstract: A power transmission configured with a mechanical pump that generates and deliver a fluid pressure to a clutch. An electromagnetic pump generates and delivers a fluid pressure to the clutch, and an accumulator connects the clutch and the electromagnetic pump, and accumulates fluid pressure acting there between. A switching valve selectively switches between connecting the mechanical pump side and the clutch in a fluid communicating manner and connecting the electromagnetic pump and the clutch in a fluid communicating manner. A valve drive portion that drives the switching valve so as to connect the mechanical pump side and the clutch when the mechanical pump is driving, and drives the switching valve so as to connect the electromagnetic pump and the clutch when the electromagnetic pump is driving in place of the mechanical pump.Type: ApplicationFiled: October 8, 2009Publication date: April 21, 2011Applicant: AISIN AW CO., LTD.Inventors: Tetsuya Shimizu, Kazunori Ishikawa, Naoyuki Fukaya, Kazuhiko Kato, Kenichi Tsuchida
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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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Publication number: 20110023981Abstract: An oil pressure control apparatus for an automatic transmission configured with an oil pressure servo that engages and disengages a friction engagement element. The friction element is engaged by first and second hydraulic oil chambers that individually provide low torque, and can provide a higher torque when working in combination. A failure solenoid valve outputs a signal when a failure occurs to stop oil pressure to an oil pressure servo. Valves are configured to determine whether oil pressure is supplied to or discharged from the first and second hydraulic oil chambers. A switching valve is switched on the basis of the failure signal, and an oil pressure can be individually supplied to and discharged from the first and second hydraulic oil chambers based on the status of the switching solenoid valve and the signal from the failure solenoid valve.Type: ApplicationFiled: June 24, 2010Publication date: February 3, 2011Applicant: AISIN AW CO., LTD.Inventors: Masahiro Ito, Munehiro Tashiro, Kenichi Tsuchida, Naoyuki Fukaya, Kazunori Ishikawa
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Publication number: 20100327206Abstract: A regulator valve is structured such that hydraulic pressure to be output from a regulated pressure output port is regulated according to urging forces, i.e., line pressure to be regulated, throttle pressure, spring force from a compression coil spring, and operating force from a plunger, which are applied to a valve spool. The plunger has a small diameter portion and a large diameter portion having a diameter larger than the diameter of the small diameter portion, both of which are axially displaceably retained in a spring receiving sleeve. The small diameter portion is urged in one axial direction at one end of the plunger that protrudes into a spring chamber and faces the valve spool, while the large diameter portion is urged in the other axial direction by range pressure at the other end of the plunger which is isolated from the small diameter portion located in the spring chamber.Type: ApplicationFiled: April 25, 2008Publication date: December 30, 2010Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Akiko Nishimine, Shinichi Ito, Kenichi Tsuchida
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Publication number: 20100203989Abstract: A power transmission device is installed in a vehicle and connected to a power generation source that is capable of outputting power for driving. The power transmission device includes a belt-type continuously variable transmission; a working fluid accumulation portion; a friction engagement element; a first pump; a pressure regulating valve; a friction engagement element pressure regulating valve; a second pump; and a switching valve.Type: ApplicationFiled: January 13, 2010Publication date: August 12, 2010Applicant: AISIN AW CO., LTD.Inventors: Haruki Shirasaka, Masahiro Ito, Tetsuya Shimizu, Kazunori Ishikawa, Kazuhiko Kato, Kenichi Tsuchida, Nobuo Suzuki
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Publication number: 20100193315Abstract: A power transmission device includes a clutch that transmits power from a motor to an axle; a first pump that is driven by power from the motor to generate and output fluid pressure; a second pump that receives and is driven by a supply of electric power to generate and output fluid pressure; a pressure regulating valve that functions as a linear solenoid valve and is formed with an input port, an output port that is connected to the clutch, and a drain port; and a switching valve that switches between a first connection state.Type: ApplicationFiled: December 28, 2009Publication date: August 5, 2010Applicant: AISIN AW CO., LTD.Inventors: Tetsuya Shimizu, Kazuhiko Kato, Kenichi Tsuchida, Kazunori Ishikawa
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Publication number: 20100162695Abstract: A hydraulic control device for an automatic transmission, including: a hydraulic pressure source; a plurality of friction engagement elements; a line pressure regulating valve that regulates hydraulic pressure from the hydraulic pressure source to a predetermined line pressure; a plurality of operation pressure regulating valves that regulate the line pressure as operation pressure for a hydraulic servo operating a friction engagement element; a maximum pressure conducting circuit that feeds a maximum pressure, among the operation pressures, to the line pressure regulating valve, wherein the friction engagement elements are engaged and released to achieve a plurality of forward speeds and a reverse speed, and the line pressure regulating valve regulates the line pressure during forward travel based on the maximum operation pressure, and regulates the line pressure during reverse travel based on the operation pressure input from a specific operation pressure regulating valve.Type: ApplicationFiled: December 2, 2009Publication date: July 1, 2010Applicant: AISIN AW CO., LTD.Inventors: Tomomi ISHIKAWA, Hiroyuki Kutsubo, Tetsuya Shimizu, Kenichi Tsuchida, Kazunori Ishikawa, Naoyuki Fukaya
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Publication number: 20100144488Abstract: A transmission apparatus including an automatic transmission that is mounted in a vehicle and is capable of engaging a first engagement element and a second engagement element among a plurality of engagement elements when shift-operated to a reverse position, and engaging the first engagement element when shift-operated to a neutral position.Type: ApplicationFiled: September 11, 2009Publication date: June 10, 2010Applicant: AISIN AW CO., LTD.Inventors: Tetsuya Shimizu, Kenichi Tsuchida, Yoshimitsu Hyodo, Naoyuki Fukaya, Kazunori Ishikawa, Hironori Sugiura, Satoshi Nishio, Kazuki Kojima
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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: 20100056334Abstract: In a fail-safe mechanism for an automatic transmission (3), when a predetermined gearshift (Rev) is positioned in the automatic transmission (3) during a non-failure state of the automatic transmission, a first valve unit (70) moves from a non-failure position toward a failure position as the oil pressure for positioning the predetermined gearshift (Rev) is caused to act on a fail-safe valve (50) as an extraneous matter-discharging oil pressure (PR).Type: ApplicationFiled: April 11, 2008Publication date: March 4, 2010Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTDInventors: Hiroomi Toi, Shinichi Ito, Akiko Nishimine, Kenichi Tsuchida
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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: 20090310160Abstract: A printed matter managing system for printing a file to which a label in accordance with file identifying information is applied to manage the printed matter includes a detection unit for detecting the label applied to the printed matter in one of reading the printed matter by a computer and physical carrying out of the printed matter from a predetermined region, and a limit unit for limiting one of using the read result by the computer and physically carrying out the printed matter in accordance with information contained in the detected label.Type: ApplicationFiled: June 2, 2009Publication date: December 17, 2009Inventors: Satoshi KAI, Masato ARAI, Kenichi TSUCHIDA
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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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Patent number: 7617676Abstract: A hydraulic control apparatus for a vehicular fluid-actuated power transmitting device provided with a lock-up clutch and an oil cooler, the lock-up clutch being operable between an engaged state and a released state according to a difference between pressures of a working fluid in an engaging fluid chamber and a releasing fluid chamber, the oil cooler being connected to a fluid passage communicating with the engaging and releasing fluid chambers, and operable to cool the working fluid, the hydraulic control apparatus including an oil cooler by-pass valve operable to permit the working fluid to by-pass the oil cooler, and a low-temperature by-pass device operable to open the oil cooler by-pass valve, for permitting the working fluid to by-passes the oil cooler, when a temperature of the working fluid is lower than a predetermined lower limit.Type: GrantFiled: February 12, 2007Date of Patent: November 17, 2009Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroshi Fukushima, Naoki Kato, Kenichi Tsuchida
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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: 20090280953Abstract: A hydraulic control system for an automatic transmission, which includes a brake, used to establish a first gear step and a reverse gear step. The hydraulic control system includes a first solenoid valve, a second solenoid valve and a control valve, which is switched by a hydraulic signal from the second solenoid valve, and that are operated simultaneously to engage the first-gear step and reverse gear step engagement element; and an neutral gear position engagement control unit that activates both solenoid valves when a shift lever is shifted to neutral to engage the brake. Thus, the generation of a shock may be prevented when the shift lever is shifted from the N position to an R position.Type: ApplicationFiled: December 5, 2007Publication date: November 12, 2009Inventors: Akiko Nishimine, Kenichi Tsuchida
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Patent number: 7611434Abstract: The fail-safe gear step switching valve (120) can be switched to the first position to establish the low-speed side fail-safe gear step (third speed-change gear step) or the second position to establish the high-speed side fail-safe gear step (fifth speed-change gear step). Upon the failure state of the solenoid valve device (SLC1, SLC2), the fail-safe gear step switching valve is held at the second position by the line hydraulic pressure (PL1). Two kinds of the fail-safe gear steps i.e., the third speed-change gear step and the fifth speed-change gear step can be established depending on the vehicle state just before the failure occurrence of the fail-safe gear step switching valve. Even if the D?N operation of the shift lever (72) is performed during the vehicle running in the fifth speed-change gear step, the fail-safe gear step switching valve remains at the second position to establish the fifth speed-change gear step even upon the shifting operation of the shift lever to the āDā position again.Type: GrantFiled: October 27, 2006Date of Patent: November 3, 2009Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hiroshi Fukushima, Naoki Kato, Kenichi Tsuchida