Patents by Inventor Kazuhiko MOTODOHI
Kazuhiko MOTODOHI 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: 10753472Abstract: A control device that includes an electronic control unit that is configured to perform neutral travel control that controls the transmission apparatus to enter a neutral state in which power is not transferred during rotation of the wheel, wherein the electronic control unit performs switching between an engaged neutral state in which a particular engagement device of the plurality of engagement devices is put in an engagement state and the transmission apparatus is put in a state in which power is not transferred and a released neutral state in which all of the plurality of engagement devices are put in a released state and the transmission apparatus is put in the state in which power is not transferred, based on at least a vehicle speed during the neutral travel control.Type: GrantFiled: February 19, 2015Date of Patent: August 25, 2020Assignee: AISIN AW CO., LTD.Inventors: Masakazu Kaifuku, Yuto Yuasa, Jyunichi Matoba, Masaru Katsuya, Kazuhiko Motodohi
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Publication number: 20170152944Abstract: A control device that includes an electronic control unit that is configured to perform neutral travel control that controls the transmission apparatus to enter a neutral state in which power is not transferred during rotation of the wheel, wherein the electronic control unit performs switching between an engaged neutral state in which a particular engagement device of the plurality of engagement devices is put in an engagement state and the transmission apparatus is put in a state in which power is not transferred and a released neutral state in which all of the plurality of engagement devices are put in a released state and the transmission apparatus is put in the state in which power is not transferred, based on at least a vehicle speed during the neutral travel control.Type: ApplicationFiled: February 19, 2015Publication date: June 1, 2017Applicant: AISIN AW CO., LTD.Inventors: Masakazu KAIFUKU, Yuto YUASA, Jyunichi MATOBA, Masaru KATSUYA, Kazuhiko MOTODOHI
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Patent number: 9327711Abstract: A control device for a hybrid vehicle automatic transmission. The hybrid vehicle being capable of EV travel in which drive wheels are driven by only a rotary electric machine with the internal combustion engine stopped. The control device having an electric oil pump control device to drive an electric oil pump that supplies oil to the friction engagement element. A neutral control device performs disengagement control on the friction engagement element. A drag determination device determines whether conditions under which drag of the friction engagement element occurs are met because of a shortage in amount of oil to be supplied to a cancellation oil chamber of the friction engagement element by the electric oil pump during the EV travel started from a state in which the hybrid vehicle is stationary. Drag elimination control device provides a command to start the internal combustion engine.Type: GrantFiled: December 26, 2012Date of Patent: May 3, 2016Assignee: AISIN AW CO., LTD.Inventors: Shishun Chin, Kenta Kimata, Masahiro Asai, Kazuhiko Motodohi, Shinichiro Iga
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Patent number: 9278687Abstract: A control device of a hybrid vehicle including an engine; an automatic transmission placed on a power transmission path between the engine and wheels, having a first friction engagement element engaged in a forward range and a second engagement element engaged in a reverse range based on a hydraulic pressure generated while the engine is stopped; and a rotary electric machine capable of driving the wheels without using the power transmission path. The rotary electric machine is driven when a shift range is the forward range or the reverse range while the internal combustion engine is stopped, and the driving of the rotary electric machine is restrained for a set time after the shift range is changed from the forward range to the reverse range or vice versa while the engine is stopped.Type: GrantFiled: February 26, 2013Date of Patent: March 8, 2016Assignee: AISIN AW CO., LTD.Inventors: Kenta Kimata, Masahiro Asai, Kazuhiko Motodohi, Shinichiro Iga
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Publication number: 20150032316Abstract: A control device for a hybrid vehicle automatic transmission. The hybrid vehicle being capable of EV travel in which drive wheels are driven by only a rotary electric machine with the internal combustion engine stopped. The control device having an electric oil pump control device to drive an electric oil pump that supplies oil to the friction engagement element. A neutral control device performs disengagement control on the friction engagement element. A drag determination device determines whether conditions under which drag of the friction engagement element occurs are met because of a shortage in amount of oil to be supplied to a cancellation oil chamber of the friction engagement element by the electric oil pump during the EV travel started from a state in which the hybrid vehicle is stationary. Drag elimination control device provides a command to start the internal combustion engine.Type: ApplicationFiled: December 26, 2012Publication date: January 29, 2015Inventors: Shishun Chin, Kenta Kimata, Masahiro Asai, Kazuhiko Motodohi, Shinichiro Iga
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Patent number: 8784249Abstract: An automatic transmission for a hybrid vehicle comprising a first hydraulic pressure supply source driven with an internal combustion engine; a second hydraulic pressure supply source driven independently of the first supply source; and a regulator valve regulating hydraulic pressure produced by the supply sources. A first oil passage supplying line pressure regulated by the regulator valve to a hydraulic servo operating a friction engagement element; a second oil passage supplying hydraulic pressure discharged from the regulator valve to a lubricated portion via an oil cooler; and a thud oil passage merged with the second oil passage at a point downstream of the oil cooler supplying the hydraulic pressure of the second supply source to the lubricated portion. A first reverse flow prevention mechanism is disposed between the oil cooler and the merging point to prevent reverse flow of hydraulic pressure.Type: GrantFiled: February 1, 2013Date of Patent: July 22, 2014Assignee: Aisin AW Co., Ltd.Inventors: Kazuhiko Motodohi, Shinichiro Iga, Yasunari Muranaka
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Patent number: 8715135Abstract: A control device for a hybrid vehicle automatic transmission. A friction engagement element control unit includes a first play elimination control unit that sets a first pressure as the pressure for a first set time where the predetermined friction engagement element is engaged using a hydraulic pressure from the electric oil pump in a travel state in which only the rotary electric machine serves as a drive source. The first play elimination pressure is lower than a play elimination pressure for use in the case where the predetermined friction engagement element is engaged using a hydraulic pressure from the mechanical oil pump in a travel state in which the internal combustion engine serves as a drive source.Type: GrantFiled: March 18, 2013Date of Patent: May 6, 2014Assignee: Aisin Aw Co., Ltd.Inventors: Yosuke Ueda, Masahiro Asai, Kazuhiko Motodohi, Yoichi Tajima
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Publication number: 20130260955Abstract: A control device of a hybrid vehicle including an engine; an automatic transmission placed on a power transmission path between the engine and wheels, having a first friction engagement element engaged in a forward range and a second engagement element engaged in a reverse range based on a hydraulic pressure generated while the engine is stopped; and a rotary electric machine capable of driving the wheels without using the power transmission path. The rotary electric machine is driven when a shift range is the forward range or the reverse range while the internal combustion engine is stopped, and the driving of the rotary electric machine is restrained for a set time after the shift range is changed from the forward range to the reverse range or vice versa while the engine is stopped.Type: ApplicationFiled: February 26, 2013Publication date: October 3, 2013Inventors: Kenta KIMATA, Masahiro ASAI, Kazuhiko MOTODOHI, Shinichiro IGA
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Publication number: 20130260957Abstract: A control device for a hybrid vehicle automatic transmission. A friction engagement element control unit includes a first play elimination control unit that sets a first pressure as the pressure for a first set time where the predetermined friction engagement element is engaged using a hydraulic pressure from the electric oil pump in a travel state in which only the rotary electric machine serves as a drive source. The first play elimination pressure is lower than a play elimination pressure for use in the case where the predetermined friction engagement element is engaged using a hydraulic pressure from the mechanical oil pump in a travel state in which the internal combustion engine serves as a drive source.Type: ApplicationFiled: March 18, 2013Publication date: October 3, 2013Applicant: AISIN AW CO., LTDInventors: Yosuke UEDA, Masahiro ASAI, Kazuhiko MOTODOHI, Yoichi TAJIMA
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Publication number: 20130219876Abstract: An automatic transmission for a hybrid vehicle comprising a first hydraulic pressure supply source driven with an internal combustion engine; a second hydraulic pressure supply source driven independently of the first supply source; and a regulator valve regulating hydraulic pressure produced by the supply sources. A first oil passage supplying line pressure regulated by the regulator valve to a hydraulic servo operating a friction engagement element; a second oil passage supplying hydraulic pressure discharged from the regulator valve to a lubricated portion via an oil cooler; and a thud oil passage merged with the second oil passage at a point downstream of the oil cooler supplying the hydraulic pressure of the second supply source to the lubricated portion. A first reverse flow prevention mechanism is disposed between the oil cooler and the merging point to prevent reverse flow of hydraulic pressure.Type: ApplicationFiled: February 1, 2013Publication date: August 29, 2013Inventors: Kazuhiko MOTODOHI, Shinichiro IGA, Yasunari MURANAKA