Patents by Inventor Tetsuya Shimizu
Tetsuya Shimizu 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: 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: 8303468Abstract: A power transmission device that 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 regulates a pressure of operation fluid output from the first pump, and delivers at least a portion of operation fluid discharged in connection with the pressure regulation to a lubrication target for use as lubricant; and a switching valve that switches between a first connection state and a second connection state.Type: GrantFiled: December 28, 2009Date of Patent: November 6, 2012Assignee: Aisin Aw Co., Ltd.Inventors: Tetsuya Shimizu, Kazuhiko Kato, Naoyuki Fukaya, Kazunori Ishikawa
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Patent number: 8292771Abstract: A hydraulic control apparatus of an automatic transmission including a switching portion which, at the same time as a reverse range pressure oil passage and a discharge delay oil passage which delays an oil pressure output are connected, causes the reverse range pressure oil passage and discharge delay oil passage, by switching between the two, in order to communicate with a hydraulic servo. The switching portion causes the hydraulic servo and discharge delay oil passage to communicate when a manual valve is switched to an N range, and causes the hydraulic servo and reverse range pressure oil passage to communicate when the manual valve (MV) is switched to a D range or an R range. Because of this arrangement, it is difficult for oil, when discharged from the hydraulic servo, to drain at an R-N switching time, and it is easy for oil to drain in the D range or the like.Type: GrantFiled: February 9, 2011Date of Patent: October 23, 2012Assignee: Aisin AW Co., Ltd.Inventors: Tetsuya Shimizu, Yoshimitsu Hyodo, Satoshi Nishio, Kazuki Kojima, Kazunori Ishikawa
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Publication number: 20120247899Abstract: A hydraulic pressure controller, which controls hydraulic pressure supplied to a torque converter including a lock-up clutch that is engageable using a hydraulic pressure from a mechanical pump, including a first pressure regulation valve that regulates pressure in a first passage connected to the pump while discharging oil in the first passage to a discharge passage; a bypass passage branched from the first passage bypassing the first pressure regulation valve; a first switching valve selectively switchable between a first state in which the bypass passage and a second passage are connected to each other and a second state in which the discharge passage and the second passage are connected to each other; and a second pressure regulation valve that regulates a hydraulic pressure in the second passage. The first switching valve is switchable into the first state to engage the clutch and into the second state to disengage the clutch.Type: ApplicationFiled: March 29, 2012Publication date: October 4, 2012Applicant: AISIN AW CO., LTD.Inventors: Tomoya JINNO, Tetsuya SHIMIZU, Kazunori ISHIKAWA
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Publication number: 20120247095Abstract: A hydraulic pressure control device including a pump driven to generate hydraulic pressure; a first pressure regulation valve that regulates hydraulic pressure in a first passage coupled to a pump along with discharge of oil; a second pressure regulation valve that receives the hydraulic pressure in the first passage and regulates the hydraulic pressure to an engagement pressure to engage a lock-up clutch according to a first signal pressure to output the engagement pressure to a second passage that supplies the oil to an engagement chamber; and a third pressure regulation valve that receives the hydraulic pressure in the first passage or the engagement pressure output to the second passage and regulates the received pressure according to the first signal pressure or a second signal pressure that synchronizes with the first signal pressure to output the resulting pressure to a third passage that supplies the oil to the disengagement chamber.Type: ApplicationFiled: March 29, 2012Publication date: October 4, 2012Applicant: AISIN AW CO., LTD.Inventors: Tomoya JINNO, Tetsuya SHIMIZU, Kazunori ISHIKAWA
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Publication number: 20120241272Abstract: A hydraulic control device controls a hydraulic pressure in an engagement side oil chamber defined on one side of a piston that configures a hydraulic clutch, and a hydraulic pressure in a back-pressure side oil chamber defined on the other side of the piston. The hydraulic control device includes a line pressure generating valve that generates a line pressure by adjusting a hydraulic pressure from an oil pump; a secondary pressure generating valve that generates a secondary pressure, which is a hydraulic pressure supplied to the back-pressure side oil chamber, by adjusting a hydraulic pressure from the line pressure generating valve so as to be lower than the line pressure; and a clutch engagement pressure generating valve that generates a clutch engagement pressure, which is a hydraulic pressure supplied to the engagement side oil chamber, by adjusting the line pressure from the line pressure generating valve.Type: ApplicationFiled: March 22, 2012Publication date: September 27, 2012Applicant: AISIN AW CO., LTD.Inventors: Tomoya JINNO, Masamichi YAMAGUCHI, Tetsuya SHIMIZU, Kenichi TSUCHIDA, Kazunori ISHIKAWA
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Publication number: 20120234645Abstract: A fluid pressure control device including a first pump actuated by power from a motor; a pressure regulator that regulates a discharge pressure from the first pump; a second pump actuated by electric power; a switcher opening a first path extending from the pressure regulator to a fluid pressure chamber of a friction engagement element, and blocking a second path extending from the second pump to the fluid pressure chamber of the friction engagement element, when the signal pressure is equal to or more than a set pressure, and the switcher blocking the first and opening the second paths when the signal pressure is less than the set pressure; and a control that controls the second pump and the fluid supply unit to supply the fluid regulated by the pressure regulator to a destination different from the fluid pressure chamber of the friction engagement element when the motor is stopped.Type: ApplicationFiled: March 13, 2012Publication date: September 20, 2012Applicant: AISIN AW CO., LTD.Inventors: Tetsuya SHIMIZU, Tomoya JINNO, Masamichi YAMAGUCHI, Kenichi TSUCHIDA, Kazunori ISHIKAWA
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Patent number: 8262527Abstract: 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: GrantFiled: September 11, 2009Date of Patent: September 11, 2012Assignee: 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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Patent number: 8264217Abstract: A detection head is provided for a moving vehicle. The detection head includes a coil array defined by a plurality of coils arranged along a moving direction of the moving vehicle. Dummy coils are provided on both sides of the coil array. Based on a difference between outputs of the dummy coils, whether the moving vehicle is in a continuous segment where the magnetic marks are provided at a constant first pitch or a discrete segment where the magnetic marks are arranged at a pitch wider than the first pitch is identified.Type: GrantFiled: April 20, 2010Date of Patent: September 11, 2012Assignee: Murata Machinery, Ltd.Inventor: Tetsuya Shimizu
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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: 8251194Abstract: A solenoid valve device that includes a solenoid valve; a drive circuit that drives the solenoid section; a current sensor that detects a current applied to the solenoid section; and a control unit that controls, when the solenoid valve is served as the pressure control valve, the drive circuit by performing a feedback control based on the current detected by the current sensor so that a current in accordance with an output pressure command is applied to the solenoid section, and controls, when the solenoid valve is served as the solenoid pump, the drive circuit without performing the feedback control so that a pump current is applied to the solenoid section.Type: GrantFiled: November 24, 2009Date of Patent: August 28, 2012Assignee: Aisin AW Co., Ltd.Inventors: Noriomi Fujii, Kazuhiko Kato, Tetsuya Shimizu, Kazunori Ishikawa, Naoyuki Fukaya
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Publication number: 20120144818Abstract: A power transmission device that transmits power from a motor to a wheel via a hydraulically driven friction engagement element and that includes a mechanical pump driven by the motor to produce a hydraulic pressure that is regulated by a pressure regulating valve; an electric pump that produces a hydraulic pressure; a switching mechanism that either switches an output pressure of the regulating valve or an output pressure of the electric pump to a servo of the engagement element based upon a signal pressure, and a drain valve that opens to drain oil when a hydraulic pressure of a preset pressure or more is applied, and the switching mechanism connects to the drain valve to allow communication between the electric pump and the drain valve in the first state, and shut off communication between the electric pump and the drain valve.Type: ApplicationFiled: October 26, 2011Publication date: June 14, 2012Applicant: AISIN AW CO., LTD.Inventors: Tetsuya SHIMIZU, Tomomi ISHIKAWA, Tomoya JINNO, Kenichi TSUCHIDA, Kazunori ISHIKAWA
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Publication number: 20120137670Abstract: A power transmission device that transmits power from a motor to a wheel via a hydraulically driven friction engagement element and that includes a mechanical pump driven by the motor to produce a hydraulic pressure that is regulated by a pressure regulating valve; an electric pump that produces a hydraulic pressure; a switching mechanism that either switches an output pressure of the regulating valve or an output pressure of the electric pump to a servo of the engagement element based upon a signal pressure; a passage to supply pressure from the mechanical pump to the hydraulic servo; a check valve in the passage that allows supply of the pressure from the mechanical pump to the hydraulic servo and prohibits supply of the pressure from the electric pump to the mechanical pump, and the switching mechanism either shuts off or allows communication through the passage based upon the signal pressure.Type: ApplicationFiled: October 26, 2011Publication date: June 7, 2012Applicant: AISIN AW CO., LTD.Inventors: Tetsuya SHIMIZU, Tomomi ISHIKAWA, Tomoya JINNO, Kenichi TSUCHIDA, Kazunori ISHIKAWA
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Patent number: 8188892Abstract: A detection head has an array including a plurality of coils. Magnetic marks are arranged in a travel route at a pitch equal to the array length. By interaction between the magnetic marks and the coils, a position of a moving vehicle is determined based on the magnetic marks.Type: GrantFiled: March 25, 2009Date of Patent: May 29, 2012Assignee: Murata Machinery, Ltd.Inventor: Tetsuya Shimizu
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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: 8123642Abstract: 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: GrantFiled: December 2, 2009Date of Patent: February 28, 2012Assignee: Aisin AW Co., Ltd.Inventors: Tomomi Ishikawa, Hiroyuki Kutsubo, Tetsuya Shimizu, Kenichi Tsuchida, Kazunori Ishikawa, Naoyuki Fukaya
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Publication number: 20120000740Abstract: A hydraulic pressure control device including a first oil passage connected to an engagement side oil chamber defined on one side of a piston included in a clutch, an engagement pressure generating valve generating an engagement pressure supplied to the engagement side oil chamber via the first oil passage; a second oil passage connected to a back-pressure side oil chamber defined on the other side of the piston, and a clutch control pressure generating valve generating a clutch control pressure supplied to the back-pressure side oil chamber via the second oil passage and operates to lower the clutch control pressure as hydraulic pressure supplied as a feedback pressure from the back-pressure-side oil chamber side becomes higher.Type: ApplicationFiled: June 13, 2011Publication date: January 5, 2012Applicant: AISIN AW CO., LTD.Inventors: Tetsuya SHIMIZU, Tomoya JINNO, Kenichi TSUCHIDA, Naoyuki FUKAYA, Kazunori ISHIKAWA
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Publication number: 20110308649Abstract: A hydraulic circuit for supplying hydraulic pressure to frictional engagement elements in an automatic transmission including an oil passage connecting an output port through which a drive pressure is output, and a second signal pressure port, of a second clutch application relay valve, and an oil passage connecting an output port through which a modulator pressure is output and the second signal pressure port, are formed in a valve body and arranged such that it is possible to open the oil passage, as well as close the oil passage, with an oil passage closing member. With the hydraulic circuit it is possible to change a formed speed in response to a shift operation when a shift, after being operated from a travel position to a non-travel position, is returned again from the non-travel position, at a time of failure.Type: ApplicationFiled: May 20, 2011Publication date: December 22, 2011Applicant: AISIN AW CO., LTD.Inventors: Tetsuya SHIMIZU, Kazuki KOJIMA, Kenichi TSUCHIDA, Naoyuki FUKAYA, Kazunori ISHIKAWA
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Publication number: 20110302915Abstract: A hydraulic pressure control device including a valve for generating a circulating pressure to a hydraulic power transmission chamber in which power is transmitted between an input- and output side of a hydraulic power transmission element via hydraulic oil; and a valve for generating a lock-up pressure supplied to a lock-up chamber that faces the hydraulic power transmission chamber with a lock-up piston included in a lock-up clutch interposed therebetween.Type: ApplicationFiled: June 9, 2011Publication date: December 15, 2011Applicant: AISIN AW CO., LTD.Inventors: Tetsuya SHIMIZU, Tomoya JINNO, Kenichi TSUCHIDA, Naoyuki FUKAYA, Kazunori ISHIKAWA
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Publication number: 20110301803Abstract: A control device for an automatic transmission that outputs a command signal to an actuator to control the automatic transmission. The control device configured with a main control section that receives a state of the automatic transmission, that determines an abnormality in the automatic transmission on the basis of the input state of the automatic transmission, and that outputs to the actuator a main control section command signal for controlling the automatic transmission so as to establish a predetermined shift speed when it is determined that an abnormality is occurring in the automatic transmission; and a monitoring section that determines an abnormality in the main control section and that outputs to the actuator a monitoring section command signal for causing the automatic transmission to establish a neutral state irrespective of the main control section command signal when it is determined that an abnormality is occurring in the main control section.Type: ApplicationFiled: May 13, 2011Publication date: December 8, 2011Applicant: AISIN AW CO., LTD.Inventors: Tetsuya SHIMIZU, Masamichi YAMAGUCHI, Kenichi TSUCHIDA, Naoyuki FUKAYA, Kazunori ISHIKAWA