Patents by Inventor Hideaki Ogasawara
Hideaki Ogasawara 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: 6692407Abstract: An engine controller for a vehicle having an engine and an automatic transmission, the automatic transmission controlling the engine during a coast-down to a predetermined gear stage, the engine controller having an engine speed detection unit that detects the number of rotations of the engine output shaft an input shaft speed detection unit that detects the number of rotations of the input shaft a power-on detection unit for detecting a power-on state caused by a driver an engine output control unit that controls the output of the engine; and an engine control unit determines an engine speed and an input shaft speed and outputs a signal to the engine output control unit such that a predetermined relationship is maintained between the engine speed and the input shaft speed when the power-on state is detected in the coast-down state.Type: GrantFiled: July 30, 2002Date of Patent: February 17, 2004Assignees: Aisin AW,Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Noboru Shibata, Mitsuhiro Nakamura, Hideaki Ogasawara, Mamoru Kurosawa, Kazuyuki Watanabe, Naoyuki Sakamoto, Toshimitsu Sato, Atsushi Ayabe, Hiromichi Kimura
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Publication number: 20030040388Abstract: Apparatus for controlling a vehicle automatic transmission having a hydraulically operated frictional coupling device operable to effect a shifting action of the automatic transmission, a switching valve operable according to a shifting command to effect the shifting action, and a pressure regulating valve operable to control a pressure of a working fluid to be supplied to the frictional coupling device through the switching valve to effect the shifting action, the apparatus including (a) a fluid temperature detector operable to detect a temperature of the working fluid, and (b) a delaying device operable to delay a moment of initiation of an operation of the pressure regulating valve to control the pressure of the working fluid to be supplied to the frictional coupling device for effecting the shifting action, such that the moment of initiation is delayed depending upon the detected working fluid temperature, to reduce a shifting shock of the automatic transmission.Type: ApplicationFiled: July 29, 2002Publication date: February 27, 2003Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoyuki Sakamoto, Kazuyuki Watanabe, Toshimitsu Sato, Atsushi Ayabe, Hiromichi Kimura, Hideaki Ogasawara, Noboru Shibata, Mitsuhiro Nakamura
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Publication number: 20030027686Abstract: An engine controller for a vehicle having an engine and an automatic transmission for transmitting the rotation of an output shaft of the engine to an input shaft through a fluidic transmission device, changing the speed of rotation by switching the transmission path, and transmitting the rotation whose speed has been changed to driving wheels, the automatic transmission controlling the engine during a coast-down to a predetermined gear stage, the engine controller having an engine speed detection unit that detects the number of rotations of the engine output shaft an input shaft speed detection unit that detects the number of rotations of the input shaft a power-on detection unit for detecting a power-on state caused by a driver an engine output control unit that controls the output of the engine; and an engine control unit determines an engine speed and an input shaft speed and outputs a signal to the engine output control unit such that a predetermined relationship is maintained between the engine speed anType: ApplicationFiled: July 30, 2002Publication date: February 6, 2003Applicant: AISIN AW CO., LTD.Inventors: Noboru Shibata, Mitsuhiro Nakamura, Hideaki Ogasawara, Mamoru Kurosawa, Kazuyuki Watanabe, Naoyuki Sakamoto, Toshimitsu Sato, Atsushi Ayabe, Hiromichi Kimura
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Publication number: 20030027679Abstract: A duty ratio for controlling an engagement force of a friction engagement device on the side of upshift engagement is corrected by an amount corresponding to an intermediate correction control value in the course of the shift. In addition, on a prerequisite condition that learning correction of a constant standby pressure control value at the start of the shift is converged, learning correction is performed for the intermediate correction control value according to a gradient of a turbine speed. Thus, a shift shock is prevented from occurring due to abrupt engagement of the friction engagement device and the like at the completion of the shift.Type: ApplicationFiled: July 31, 2002Publication date: February 6, 2003Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naoyuki Sakamoto, Kazuyuki Watanabe, Toshimitsu Sato, Atsushi Ayabe, Hiromichi Kimura, Hideaki Ogasawara, Noboru Shibata, Mitsuhiro Nakamura
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Publication number: 20030027685Abstract: A shift control apparatus of an automatic transmission of a motor vehicle to which torque is transmitted from an engine via a fluid coupling device is provided. In the automatic transmission including a plurality of hydraulically operated friction elements, a clutch-to-clutch downshift is carried out during coasting of the vehicle by releasing one of the friction elements and engaging another friction element. A controller of the shift control apparatus detects a difference between input and output rotation speeds of the fluid coupling device, and increases an engine speed by a controlled amount based on the difference between the input and output rotation speeds when the clutch-to-clutch downshift is carried out during coasting of the vehicle, so that the vehicle is brought into a minimal driving state in which the engine speed is slightly higher than the output rotation speed of the fluid coupling device.Type: ApplicationFiled: July 23, 2002Publication date: February 6, 2003Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazuyuki Watanabe, Toshimitsu Sato, Atsushi Ayabe, Shinji Kato, Naoyuki Sakamoto, Hiromichi Kimura, Noboru Shibata, Mitsuhiro Nakamura, Hideaki Ogasawara
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Publication number: 20030027684Abstract: Apparatus for controlling a vehicle drive system including an automatic transmission, including a feedback controller operable upon a shift-down action of the transmission effected by concurrent releasing and engaging actions of first and second frictional coupling devices during an operation of a manually operable vehicle accelerating member to drive the vehicle with the drive power soruce, for controlling an engaging force of the first frictional coupling device, and a learning compensator operable upon detection of an abnormality of the shift-down action, for learning compensation of an initial value of the engaging force at which a feedback control of the engaging force is initiated, or an output reducing device for reducing an output of a drive power source when input speed of the transmission has been increased to a value close to a synchronization value, and/or upon racing of the drive power source during the shift-down action.Type: ApplicationFiled: July 29, 2002Publication date: February 6, 2003Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazuyuki Watanabe, Naoyuki Sakamoto, Atsushi Ayabe, Toshimitsu Sato, Hiromichi Kimura, Hideaki Ogasawara, Mitsuhiro Nakamura, Noboru Shibata
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Publication number: 20030022758Abstract: Apparatus for controlling a vehicle drive system including a drive power source, a fluid-operated power transmitting device connected to the drive power source, and an automatic transmission for transmitting a rotary motion of the fluid-operated power transmitting device to vehicle drive wheels such that a speed ratio of the automatic transmission is variable, the apparatus being arranged to increase an output of the drive power source for increasing its speed upon a shift-down action of the automatic transmission so as to increase its speed ratio during a coasting run of the vehicle, and including an output controlling element operable to control the output of the drive power source, and a gradually output increasing device operable upon the shift-down action during the coasting run, for controlling the output controlling element so as to gradually increase the speed of the drive power source at a predetermined rate.Type: ApplicationFiled: July 26, 2002Publication date: January 30, 2003Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazuyuki Watanabe, Naoyuki Sakamoto, Atsushi Ayabe, Toshimitsu Sato, Hiromichi Kimura, Hideaki Ogasawara, Mitsuhiro Nakamura, Noboru Shibata
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Patent number: 6319165Abstract: A hydraulic control device for an automatic transmission that can ensure power transmission when a failure occurs to the solenoid valve of the hydraulic control device, the hydraulic control device having a plurality of hydraulic servos for engaging and disengaging a plurality of friction engagement elements in accordance with the supply and discharge of a hydraulic pressure so as to prevent interlock from occurring to the transmission, a solenoid valve for generating a predetermined hydraulic pressure and supplying the predetermined hydraulic pressure to a hydraulic servo selected in correspondence with a target gear ratio and fail-safe means for supplying fail-safe hydraulic pressure to at least two hydraulic servos selected to attain an arbitrary gear ratio when a failure occurs to the solenoid valve and power transmission thereby becomes impossible.Type: GrantFiled: November 29, 1999Date of Patent: November 20, 2001Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Masahiro Itou, Hideaki Ogasawara, Naoyuki Fukaya, Takenori Kanou, Yoshihiro Iijima
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Publication number: 20010036878Abstract: To prevent the neutral state from being formed in a change gear apparatus and allow the obtaining of an intended gear change appropriately during a servo malfunction. Hydraulic servos engage and disengage a plurality of friction engagement elements; a hydraulic pressure supply system supplies the hydraulic servo of a predetermined friction engagement element with hydraulic pressure; and an auxiliary hydraulic pressure supply systems supplies a predetermined hydraulic servo with another hydraulic pressure, in the case where the hydraulic pressure supply system is placed in a first unsupplied state where the hydraulic pressure supply system cannot supply the hydraulic servo of the predetermined friction engagement element with hydraulic pressure.Type: ApplicationFiled: March 28, 2001Publication date: November 1, 2001Applicant: AISIN AW CO., LTD.Inventors: Masahiro Itou, Hideaki Ogasawara, Naoyuki Fukaya, Mikio Iwase, Kazuhisa Ozaki, Keizo Kobayashi, Hiromichi Kimura, Yoshihiro Iijima, Koichi Tanaka, Shigeki Hiramatsu, Kazuyuki Watanabe