Patents by Inventor Shin-ichirou Murakami
Shin-ichirou Murakami 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: 8647234Abstract: A vehicle driving apparatus configured with a drive power source, a fluid coupling, a transmission apparatus; and a control apparatus. A rotation of a drive input member driven by the drive power source is transmitted to a shift input member via the fluid coupling and a rotation of the shift input member is shifted by the transmission apparatus and then transmitted to an output member. When a state shift command for shifting from a non-transmission state to a transmission state is input into a control apparatus in a state in which the drive power source does not generate a driving force, the control apparatus performs a shift input rotation operation before engaging a frictional engagement element and shifting to the transmission state by causing the drive power source to generate the driving force and rotating the shift input member via the fluid coupling while maintaining the non-transmission state.Type: GrantFiled: February 2, 2011Date of Patent: February 11, 2014Assignee: Aisin AW Co., Ltd.Inventors: Hiroshi Tsutsui, Shingo Uozumi, Takeshi Torii, Shin-ichirou Murakami, Takahiro Miyazawa
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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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Patent number: 8538647Abstract: In an operation of controlling an automatic transmission, an engagement pressure for each hydraulic servo in a normal operation is determined so that none of friction engagement elements slips at each shift speed in the normal operation, and so that in case of a failure in which the friction engagement element that is supposed to be disengaged in the normal operation is engaged, one of the friction engagement elements slips, and thus one of the shift speeds is established. In the control operation, upon detection of a failure state in which a gear ratio after a shift operation is a gear ratio of a shift speed different from a shift speed to be established, the slipping friction engagement element is disengaged, and the shift speed that is different from the shift speed to be established is temporarily retained.Type: GrantFiled: August 27, 2010Date of Patent: September 17, 2013Assignee: Aisin AW Co., Ltd.Inventors: Tatsuya Sahashi, Shin-ichirou Murakami, Masaki Nishide, Tatsuya Oba
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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: 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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Publication number: 20120010794Abstract: In an operation of controlling an automatic transmission, an engagement pressure for each hydraulic servo in a normal operation is determined so that none of friction engagement elements slips at each shift speed in the normal operation, and so that in case of a failure in which the friction engagement element that is supposed to be disengaged in the normal operation is engaged, one of the friction engagement elements slips, and thus one of the shift speeds is established. In the control operation, upon detection of a failure state in which a gear ratio after a shift operation is a gear ratio of a shift speed different from a shift speed to be established, the slipping friction engagement element is disengaged, and the shift speed that is different from the shift speed to be established is temporarily retained.Type: ApplicationFiled: August 27, 2010Publication date: January 12, 2012Applicant: AISIN AW CO., LTD.Inventors: Tatsuya Sahashi, Shin-ichirou Murakami, Masaki Nishide, Tatsuya Oba
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Publication number: 20110212809Abstract: A vehicle driving apparatus configured with a drive power source, a fluid coupling, a transmission apparatus; and a control apparatus. A rotation of a drive input member driven by the drive power source is transmitted to a shift input member via the fluid coupling and a rotation of the shift input member is shifted by the transmission apparatus and then transmitted to an output member. When a state shift command for shifting from a non-transmission state to a transmission state is input into a control apparatus in a state in which the drive power source does not generate a driving force, the control apparatus performs a shift input rotation operation before engaging a frictional engagement element and shifting to the transmission state by causing the drive power source to generate the driving force and rotating the shift input member via the fluid coupling while maintaining the non-transmission state.Type: ApplicationFiled: February 2, 2011Publication date: September 1, 2011Applicant: AISIN AW CO., LTD.Inventors: Hiroshi TSUTSUI, Shingo UOZUMI, Takeshi TORII, Shin-ichirou MURAKAMI, Takahiro MIYAZAWA
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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: 20090062067Abstract: An excessive oil temperature increase prevention device for a torque converter of an automatic transmission is provided wherein, if the per-unit-time heating value of the torque converter becomes greater than or equal to an upper limit value, then the automatic transmission is downshifted and an upshift is inhibited. An expected input shaft speed and an expected input torque after the upshift are calculated. An expected speed ratio and an expected capacity coefficient are also calculated. A per-unit-time expected heating value after the upshift is calculated using the expected input shaft speed, the expected speed ratio, and the expected capacity coefficient. When the per-unit-time expected heating value becomes less than or equal to a lower limit value, the inhibition of the upshift is cancelled.Type: ApplicationFiled: August 29, 2008Publication date: March 5, 2009Applicant: AISIN AW CO., LTDInventors: Masakatsu IWASE, Shin-ichirou MURAKAMI, Hiroshi TSUTSUI, Masahiko NISHIKAWA