Patents by Inventor Youhei Ishikawa
Youhei Ishikawa 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: 10323744Abstract: Control device for continuously variable transmission (4) with auxiliary transmission having variator (20); hydraulic pressure control circuit (11) having primary pressure solenoid (11b); and transmission ratio controller (12) controlling the transmission ratio of variator (20) by feedback control. The transmission ratio controller (12) has a high limiter control unit (FIG. 5) that, when receiving a high transmission ratio limiting request, performs a high limiter control that limits the transmission ratio to a High limit line. The transmission ratio controller (12) also has a primary pressure lower limit regulation control unit (FIG. 4) that, when operation of the high limiter control is started during a time period when the transmission ratio is present at a High transmission ratio side with respect to the high limit transmission ratio, regulates a decrease of a primary command pressure to the primary pressure solenoid up to a High limiter-operated final target primary lower limit pressure.Type: GrantFiled: December 16, 2015Date of Patent: June 18, 2019Assignee: JATCO LTDInventors: Tomoyuki Suwabe, Shin Tsukamoto, Youhei Ishikawa
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Publication number: 20180073634Abstract: Control device for continuously variable transmission (4) with auxiliary transmission having variator (20); hydraulic pressure control circuit (11) having primary pressure solenoid (11b); and transmission ratio controller (12) controlling the transmission ratio of variator (20) by feedback control. The transmission ratio controller (12) has a high limiter control unit (FIG. 5) that, when receiving a high transmission ratio limiting request, performs a high limiter control that limits the transmission ratio to a High limit line. The transmission ratio controller (12) also has a primary pressure lower limit regulation control unit (FIG. 4) that, when operation of the high limiter control is started during a time period when the transmission ratio is present at a High transmission ratio side with respect to the high limit transmission ratio, regulates a decrease of a primary command pressure to the primary pressure solenoid up to a High limiter-operated final target primary lower limit pressure.Type: ApplicationFiled: December 16, 2015Publication date: March 15, 2018Applicant: JATCO LtdInventors: Tomoyuki SUWABE, Shin TSUKAMOTO, Youhei ISHIKAWA
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Patent number: 9087505Abstract: A sound insulator of the invention includes a sound absorption layer and an air-impermeable resonance layer, which are bonded to each other via an adhesive layer. The sound absorption layer has a thickness in a range of 5 to 50 mm, an area-weight of not greater than 2000 g/m2 and a two-layer structure of a high-density sound absorption layer and a low-density sound absorption layer. The high-density sound absorption layer is bonded to the air-impermeable resonance layer via the adhesive layer and has a density in a range of 0.05 to 0.20 g/cm3 and a thickness in a range of 2 to 30 mm. The low-density sound absorption layer is bonded to the other face of the high-density sound absorption layer via an adhesive layer and has a density in a range of 0.01 to 0.10 g/cm3 and a thickness in a range of 2 to 30 mm.Type: GrantFiled: January 9, 2014Date of Patent: July 21, 2015Assignees: Takehiro Co., Ltd., Toyota Boshoku CorporationInventors: Toru Inoue, Masaki Ishikawa, Youhei Ishikawa, Sohei Matsuyama, Hideyuki Mori
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Publication number: 20140124290Abstract: A sound insulator of the invention includes a sound absorption layer and an air-impermeable resonance layer, which are bonded to each other via an adhesive layer. The sound absorption layer has a thickness in a range of 5 to 50 mm, an area-weight of not greater than 2000 g/m2 and a two-layer structure of a high-density sound absorption layer and a low-density sound absorption layer. The high-density sound absorption layer is bonded to the air-impermeable resonance layer via the adhesive layer and has a density in a range of 0.05 to 0.20 g/cm3 and a thickness in a range of 2 to 30 mm. The low-density sound absorption layer is bonded to the other face of the high-density sound absorption layer via an adhesive layer and has a density in a range of 0.01 to 0.10 g/cm3 and a thickness in a range of 2 to 30 mm.Type: ApplicationFiled: January 9, 2014Publication date: May 8, 2014Applicants: Toyota Boshoku Corporation, Takehiro Co., Ltd.Inventors: Toru Inoue, Masaki Ishikawa, Youhei Ishikawa, Sohei Matsuyama, Hideyuki Mori
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Patent number: 8637145Abstract: A sound insulator of the invention includes a sound absorption layer and an air-impermeable resonance layer, which are bonded to each other via an adhesive layer. The sound absorption layer has a thickness in a range of 5 to 50 mm, an area-weight of not greater than 2000 g/m2 and a two-layer structure of a high-density sound absorption layer and a low-density sound absorption layer The high-density sound absorption layer is bonded to the air-impermeable resonance layer via the adhesive layer and has a density in a range of 0.05 to 0.20 g/cm3and a thickness in a range of 2 to 30 mm. The low-density sound absorption layer is bonded to the other face of the high-density sound absorption layer via an adhesive layer and has a density in a range of 0.01 to 0.10 g/cm3 and a thickness in a range of 2 to 30 mm.Type: GrantFiled: April 10, 2012Date of Patent: January 28, 2014Assignees: Takehiro Co., Ltd., Toyota Boshoku CorporationInventors: Toru Inoue, Masaki Ishikawa, Youhei Ishikawa, Sohei Matsuyama, Hideyuki Mori
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Patent number: 8532893Abstract: In an automatic transmission with a speed changer having a plurality of engagement elements and configured to shift the speed changer into a selected one of a plurality of shift stages by switching engaged and disengaged states of the engagement elements, a first rotation sensor is provided for detecting input rotation of the speed changer and a second rotation sensor for detecting output rotation of the speed changer. Also provided is a transmission controller configured to determine whether a change in input torque inputted into the speed changer occurs. The transmission controller is further configured to determine that interlock has occurred in the speed changer, when there is no pulse signal output from the second rotation sensor though, during a vehicle stopped state, the input-torque change has occurred and the pulse signal from the first rotation sensor has been outputted.Type: GrantFiled: June 6, 2011Date of Patent: September 10, 2013Assignee: Jatco LtdInventors: Yutaka Tohyama, Hideharu Yamamoto, Masahiro Hamano, Hiroyasu Tanaka, Youhei Ishikawa
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Publication number: 20120255809Abstract: A sound insulator of the invention includes a sound absorption layer and an air-impermeable resonance layer, which are bonded to each other via an adhesive layer. The sound absorption layer has a thickness in a range of 5 to 50 mm, an area-weight of not greater than 2000 g/m2 and a two-layer structure of a high-density sound absorption layer and a low-density sound absorption layer. The high-density sound absorption layer is bonded to the air-impermeable resonance layer via the adhesive layer and has a density in a range of 0.05 to 0.20 g/cm3 and a thickness in a range of 2 to 30 mm. The low-density sound absorption layer is bonded to the other face of the high-density sound absorption layer via an adhesive layer and has a density in a range of 0.01 to 0.10 g/cm3 and a thickness in a range of 2 to 30 mm.Type: ApplicationFiled: April 10, 2012Publication date: October 11, 2012Inventors: Toru Inoue, Masaki Ishikawa, Youhei Ishikawa, Sohei Matsuyama, Hideyuki Mori
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Publication number: 20120143448Abstract: In an automatic transmission with a speed changer having a plurality of engagement elements and configured to shift the speed changer into a selected one of a plurality of shift stages by switching engaged and disengaged states of the engagement elements, a first rotation sensor is provided for detecting input rotation of the speed changer and a second rotation sensor for detecting output rotation of the speed changer. Also provided is a transmission controller configured to determine whether a change in input torque inputted into the speed changer occurs. The transmission controller is further configured to determine that interlock has occurred in the speed changer, when there is no pulse signal output from the second rotation sensor though, during a vehicle stopped state, the input-torque change has occurred and the pulse signal from the first rotation sensor has been outputted.Type: ApplicationFiled: June 6, 2011Publication date: June 7, 2012Inventors: Yutaka TOHYAMA, Hideharu Yamamoto, Masahiro Hamano, Hiroyasu Tanaka, Youhei Ishikawa
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Patent number: 8194879Abstract: The objective of the present invention is to efficiently and inexpensively mass-produce a sound insulator for a vehicle which is light in weight and has excellent sound insulating properties. For this purpose, the ultra-light sound insulator of the present invention is composed of a felt single sheet 3 having a vehicle interior side surface 1 and a vehicle exterior side surface 2 and being thermoformed of cotton fibers and binder fibers which are tangled and contacted and jointed to each other in a random manner. The ratio of the stiffness of the vehicle interior side surface 1 to that of the vehicle exterior side surface 2 is set to be in a range of 1.1 to 10. The single sheet 3 also has an area of gradually-decreasing stiffness 4 that spreads over at least one part of the area between the vehicle interior side surface 1 and the vehicle exterior side surface 2.Type: GrantFiled: December 13, 2006Date of Patent: June 5, 2012Assignees: Takehiro Co., Ltd., Toyota Boshoku Kabushiki KaishaInventors: Masaki Ishikawa, Youhei Ishikawa, Sohei Matsuyama, Hideyuki Mori
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Patent number: 8158246Abstract: A sound insulator of the invention includes a sound absorption layer 202 and an air-impermeable resonance layer 203, which are bonded to each other via an adhesive layer 204. The sound absorption layer 202 has a thickness in a range of 5 to 50 mm and an area-weight of not greater than 2000 g/m2. The sound absorption layer 202 has a two-layer structure of a high-density sound absorption layer 202a and a low-density sound absorption layer 202b, which have different densities. The high-density sound absorption layer 202a is bonded to the air-impermeable resonance layer 203 via the adhesive layer 204 and has a density in a range of 0.05 to 0.20 g/cm3 and a thickness in a range of 2 to 30 mm. The low-density sound absorption layer 202b is bonded to the other face of the high-density sound absorption layer 202a, which is opposite to the air-impermeable resonance layer 203, via an adhesive layer 202c and has a density in a range of 0.01 to 0.10 g/cm3 and a thickness in a range of 2 to 30 mm.Type: GrantFiled: March 23, 2004Date of Patent: April 17, 2012Assignees: Takehiro Co., Ltd., Toyota Boshoku CorporationInventors: Toru Inoue, Masaki Ishikawa, Youhei Ishikawa, Sohei Matsuyama, Hideyuki Mori
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Patent number: 7412907Abstract: A range recognition apparatus for an automatic transmission. A first contact is configured to generate a first range signal during a state of a range selector being within a first region. A second contact is configured to generate a second range signal during the state of the range selector being within a second region overlapping with the first region. A controller is configured to recognize that a first gear range of the automatic transmission is selected, when the first range signal is present and the second range signal is absent; to recognize that a second gear range of the automatic transmission is selected, when the first range signal is absent and the second range signal is present; and to recognize that the first gear range is selected, when the first range signal and the second range signal are both present.Type: GrantFiled: October 5, 2005Date of Patent: August 19, 2008Assignee: Jatco LtdInventors: Takeshi Oohori, Youhei Ishikawa, Takuichiro Inoue, Hiroyasu Tanaka
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Patent number: 7331900Abstract: The shift control apparatus for a continuously-variable transmission includes a primary pulley; a secondary pulley connected with the primary pulley by a belt; a shift actuator that varies a speed ratio; a line pressure adjusting that adjusts a line pressure; a secondary-pressure adjusting section that adjusts a secondary pressure; and a control section that controls the shift actuator, the line pressure adjusting section, and the secondary-pressure adjusting section. Moreover, the control section includes a fail determining section that determines whether the shift actuator is under a failed condition.Type: GrantFiled: September 21, 2005Date of Patent: February 19, 2008Assignee: Jatco LtdInventors: Hideki Oshita, Hiroyasu Tanaka, Takuichiro Inoue, Youhei Ishikawa, Kousuke Abe
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Publication number: 20070189510Abstract: Disclosed is a data collector that collects a first data string sent by a control unit to a network according to a predetermined format. The control unit has a first identification number, and the first data string includes the first identification number and a parameter which is used to control a vehicle or a vehicle component. The data collector includes a first collecting means for collecting the first data string sent by the control unit; and a second collecting means for collecting a second data string sent by a data converter. The data converter has a second identification number different from the first identification number of the control unit and the second data string conforms to the predetermined format. The data converter converts analog data sent from a sensor that detects a driving condition of the vehicle into digital data, puts the second identification number and the digital data in the second data string to be sent, and sends the second data string at a predetermined interval.Type: ApplicationFiled: August 29, 2005Publication date: August 16, 2007Inventors: Hiroyasu Tanaka, Takuichiro Inoue, Youhei Ishikawa, Yasuhiro Tani, Toshiji Iida
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Publication number: 20070144829Abstract: The objective of the present invention is to efficiently and inexpensively mass-produce a sound insulator for a vehicle which is light in weight and has excellent sound insulating properties. For this purpose, the ultra-light sound insulator of the present invention is composed of a felt single sheet 3 having a vehicle interior side surface 1 and a vehicle exterior side surface 2 and being thermoformed of cotton fibers and binder fibers which are tangled and contacted and jointed to each other in a random manner. The ratio of the stiffness of the vehicle interior side surface 1 to that of the vehicle exterior side surface 2 is set to be in a range of 1.1 to 10. The single sheet 3 also has an area of gradually-decreasing stiffness 4 that spreads over at least one part of the area between the vehicle interior side surface 1 and the vehicle exterior side surface 2.Type: ApplicationFiled: December 13, 2006Publication date: June 28, 2007Applicants: TAKEHIRO CO., LTD., TOYOTA BOSHOKU KABUSHIKI KAISHAInventors: Masaki ISHIKAWA, Youhei ISHIKAWA, Sohei MATSUYAMA, Hideyuki MORI
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Patent number: 7229372Abstract: During a downshift of a belt-drive continuously variable transmission, occurring owing to vehicle deceleration, a CVT controller foretells that a slippage between a drive belt and each of primary and secondary variable-width pulleys tends to occur, when a primary pulley pressure is less than a first predetermined pressure level and a primary pulley speed is less than a first predetermined rotational speed. When the belt slippage has been foretold, the CVT controller inhibits the primary pulley pressure from dropping by setting an actual transmission ratio calculated before a set time period from a time when the slippage has been foretold or a transmission ratio of a relatively higher speed side as compared with a ratio-change operating state obtained when the slippage has been foretold, to a desired transmission ratio, or by relatively rising a line pressure as compared with a line pressure level produced when the slippage has been foretold.Type: GrantFiled: September 26, 2003Date of Patent: June 12, 2007Assignee: JATCO LtdInventors: Shigeki Shimanaka, Hiroyasu Tanaka, Youhei Ishikawa, Tatsuo Wakahara, Yoshihisa Kodama, Hideki Oshita
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Patent number: 7169070Abstract: There are provided with a determination means for determining whether or not the correlation between the pressure value detected by the primary pressure sensor and the pressure value detected by the secondary pressure sensor is an actually impossible relation (Step 5), and a switchover means for switching over to an open control while prohibiting a feedback control when the correlation is determined to have become a relation actually impossible by the determination means (Step 6). Presence or absence of a fault to the primary pressure sensor or the secondary pressure sensor (particularly, fault of fixed output voltage) is judged based on the correlation between the output voltage of the primary pressure sensor and the output voltage of the secondary pressure sensor to prohibit the control of a primary pressure and a secondary pressure using the hydraulic pressure sensors when it is judged that there is a fault.Type: GrantFiled: September 26, 2003Date of Patent: January 30, 2007Assignee: Jatco Ltd.Inventors: Tateki Jozaki, Shigeru Ishii, Tatsuo Wakahara, Masahiro Yamamoto, Hiroyasu Tanaka, Youhei Ishikawa
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Publication number: 20060201741Abstract: A sound insulator of the invention includes a sound absorption layer 202 and an air-impermeable resonance layer 203, which are bonded to each other via an adhesive layer 204. The sound absorption layer 202 has a thickness in a range of 5 to 50 mm and an area-weight of not greater than 2000 g/m2. The sound absorption layer 202 has a two-layer structure of a high-density sound absorption layer 202a and a low-density sound absorption layer 202b, which have different densities. The high-density sound absorption layer 202a is bonded to the air-impermeable resonance layer 203 via the adhesive layer 204 and has a density in a range of 0.05 to 0.20 g/cm3 and a thickness in a range of 2 to 30 mm. The low-density sound absorption layer 202b is bonded to the other face of the high-density sound absorption layer 202a, which is opposite to the air-impermeable resonance layer 203, via an adhesive layer 202c and has a density in a range of 0.01 to 0.10 g/cm3 and a thickness in a range of 2 to 30 mm.Type: ApplicationFiled: March 23, 2004Publication date: September 14, 2006Inventors: Toru Inoue, Masaki Ishikawa, Youhei Ishikawa, Sohei Matsuyama, Hideyuki Mori
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Publication number: 20060075839Abstract: A range recognition apparatus for an automatic transmission. A first contact is configured to generate a first range signal during a state of a range selector being within a first region. A second contact is configured to generate a second range signal during the state of the range selector being within a second region overlapping with the first region. A controller is configured to recognize that a first gear range of the automatic transmission is selected, when the first range signal is present and the second range signal is absent; to recognize that a second gear range of the automatic transmission is selected, when the first range signal is absent and the second range signal is present; and to recognize that the first gear range is selected, when the first range signal and the second range signal are both present.Type: ApplicationFiled: October 5, 2005Publication date: April 13, 2006Inventors: Takeshi Oohori, Youhei Ishikawa, Takuichiro Inoue, Hiroyasu Tanaka
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Publication number: 20060063641Abstract: The shift control apparatus for a continuously-variable transmission includes; a primary pulley; a secondary pulley connected with the primary pulley by a belt; a shift actuator adapted to vary a speed ratio; a line pressure adjusting section configured to adjust a line pressure; a secondary-pressure adjusting section configured to adjust a secondary pressure; and a control section configured to control the shift actuator, the line pressure adjusting section, and the secondary-pressure adjusting section. Moreover, the control section includes a fail determining section configured to determine whether the shift actuator is under a failed condition.Type: ApplicationFiled: September 21, 2005Publication date: March 23, 2006Inventors: Hideki Oshita, Hiroyasu Tanaka, Takuichiro Inoue, Youhei Ishikawa, Kousuke Abe
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Publication number: 20050192153Abstract: There are provided with a determination means for determining whether or not the correlation between the pressure value detected by the primary pressure sensor and the pressure value detected by the secondary pressure sensor is an actually impossible relation (Step 5), and a switchover means for switching over to an open control while prohibiting a feedback control when the correlation is determined to have become a relation actually impossible by the determination means (Step 6). Presence or absence of a fault to the primary pressure sensor or the secondary pressure sensor (particularly, fault of fixed output voltage) is judged based on the correlation between the output voltage of the primary pressure sensor and the output voltage of the secondary pressure sensor to prohibit the control of a primary pressure and a secondary pressure using the hydraulic pressure sensors when it is judged that there is a fault.Type: ApplicationFiled: September 26, 2003Publication date: September 1, 2005Applicant: JATCO LtdInventors: Tateki Jozaki, Shigeru Ishii, Tatsuo Wakahara, Masahiro Yamamoto, Hiroyasu Tanaka, Youhei Ishikawa