Patents by Inventor Mitsuhide Sasaki
Mitsuhide Sasaki 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: 8321111Abstract: A pedal system to realize an intended vehicle output in response to pedal depression is provided. The pedal system provides hysteresis in the relationship between the pedal effort and the vehicle output, taking into account a pedal effort in a depressing motion or in a releasing motion, employing a relationship including a straight line or a folded line. A vehicle output command may be delivered by changing the vehicle output relative to the pedal effort depending on the vehicle speed. An appropriate vehicle output command may be delivered by providing a maintaining motion in addition to the depressing motion and the releasing motion with a different pedal effort and vehicle output command relationship, and by changing the sensitivity of the vehicle output command relative to the pedal effort in the maintaining motion depending on the pedal effort-increasing/decreasing direction, vehicle information, and the vehicle output command or the pedal effort.Type: GrantFiled: February 16, 2006Date of Patent: November 27, 2012Assignee: Hitachi, Ltd.Inventors: Kentaro Ueno, Mitsuhide Sasaki
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Patent number: 8239100Abstract: An electric braking apparatus which first moves a piston in a detaching direction or passes a current to move the piston in the detaching direction in order to detect a pad contacting position. Furthermore, while the piston moves in the detaching direction, pad non-contact judgment is performed. After a pad non-contact state is confirmed, the piston is moved in a pressing direction to detect the pad contacting position. When the piston does not move in the detaching direction, it is judged that a parking brake has an ON-state, and it is waited until a host system instructs parking brake release.Type: GrantFiled: August 8, 2007Date of Patent: August 7, 2012Assignee: Hitachi, Ltd.Inventors: Kentarou Ueno, Mitsuhide Sasaki, Hirotaka Oikawa, Tohma Yamaguchi, Hiroki Takeda
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Patent number: 8165747Abstract: For a pedal travel, a pedal reaction force, a driving force of a vehicle, and a braking force of a vehicle, different characteristics conformed to a stepping motion, a releasing motion, and a holding motion are determined on the basis of a pedal effort and predetermined characteristics of a pedal reaction force, and characteristics in a holding motion are changed according to vehicle information and environmental information.Type: GrantFiled: February 17, 2006Date of Patent: April 24, 2012Assignee: Hitachi, Ltd.Inventors: Kentaro Ueno, Mitsuhide Sasaki
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Patent number: 8076874Abstract: A motor is controlled to always consume power supplied from a power supply system or not to supply power to the power supply system, by performing control to advance or delay a phase of a 3-phase current flowing in the motor or to reduce a percentage of the generated torque with respect to an effective value of the 3-phase current of the motor, or by applying a d-axis current to the motor.Type: GrantFiled: July 25, 2008Date of Patent: December 13, 2011Assignee: Hitachi, Ltd.Inventors: Kentaro Ueno, Mitsuhide Sasaki, Toshiyuki Innami
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Patent number: 7779721Abstract: A small and low-energy consuming operation input device enabling the adjustment of an operational reaction, comprising a rigidity adjusting mechanism for adjusting the relation of the displacement amount of an input part to the deformation amount of an elastic body by changing the position of the load acting point on the elastic body.Type: GrantFiled: June 21, 2004Date of Patent: August 24, 2010Assignee: Hitachi, Ltd.Inventors: Atsushi Yokoyama, Mitsuhide Sasaki
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Publication number: 20090026998Abstract: A motor is controlled to always consume power supplied from a power supply system or not to supply power to the power supply system, by performing control to advance or delay a phase of a 3-phase current flowing in the motor or to reduce a percentage of the generated torque with respect to an effective value of the 3-phase current of the motor, or by applying a d-axis current to the motor.Type: ApplicationFiled: July 25, 2008Publication date: January 29, 2009Applicant: HITACHI, LTD.Inventors: Kentaro Ueno, Mitsuhide Sasaki, Toshiyuki Innami
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Patent number: 7445091Abstract: An electrically operated brake device in which braking force differences between electrically operated brakes are reduced to prevent unstable vehicle traveling during braking. Motors 13 of electrically operated brakes are returned to standard positions during the stop of a vehicle and the motor 13 of each of the brakes is driven for a predetermined amount, pressing a brake pad 17 against a disc rotor 18 to produce a braking force. An electric current value of each motor 13 in the above operation is measured and differences between the values are calculated. Electric current of each motor is increased or decreased so that there is no current difference between the motors 13. Based on a drive amount of each motor in this operation, standard positions of the motors are determined and updated. Repeating the above operations reduces braking force differences between the brakes.Type: GrantFiled: June 21, 2004Date of Patent: November 4, 2008Assignee: Hitachi, Ltd.Inventors: Yoshinari Kawahara, Kousaku Ohno, Atsushi Yokoyama, Mitsuhide Sasaki
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Publication number: 20080059023Abstract: An electric braking apparatus which first moves a piston in a detaching direction or passes a current to move the piston in the detaching direction in order to detect a pad contacting position. Furthermore, while the piston moves in the detaching direction, pad non-contact judgment is performed. After a pad non-contact state is confirmed, the piston is moved in a pressing direction to detect the pad contacting position. When the piston does not move in the detaching direction, it is judged that a parking brake has an ON-state, and it is waited until a host system instructs parking brake release.Type: ApplicationFiled: August 8, 2007Publication date: March 6, 2008Applicant: Hitachi, Ltd.Inventors: Kentarou UENO, Mitsuhide Sasaki, Hirotaka Oikawa, Tohma Yamaguchi, Hiroki Takeda
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Publication number: 20080029355Abstract: An electrically operated brake device in which braking force differences between electrically operated brakes are reduced to prevent unstable vehicle traveling during braking. Motors 13 of electrically operated brakes are returned to standard positions during the stop of a vehicle and the motor 13 of each of the brakes is driven for a predetermined amount, pressing a brake pad 17 against a disc rotor 18 to produce a braking force. An electric current value of each motor 13 in the above operation is measured and differences between the values are calculated. Electric current of each motor is increased or decreased so that there is no current difference between the motors 13. Based on a drive amount of each motor in this operation, standard positions of the motors are determined and updated. Repeating the above operations reduces braking force differences between the brakes.Type: ApplicationFiled: June 21, 2004Publication date: February 7, 2008Applicant: Hitachi, Ltd.Inventors: Yoshinari Kawahara, Kousaku Ohno, Atsushi Yokoyama, Mitsuhide Sasaki
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Publication number: 20070245844Abstract: A small and low-energy consuming operation input device enabling the adjustment of an operational reaction, comprising a rigidity adjusting mechanism for adjusting the relation of the displacement amount of an input part to the deformation amount of an elastic body by changing the position of the load acting point on the elastic body.Type: ApplicationFiled: June 21, 2004Publication date: October 25, 2007Applicant: HITACHI LTD.Inventors: Atsushi Yokoyama, Mitsuhide Sasaki
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Publication number: 20070112473Abstract: An operation input device of a vehicle capable of operating the vehicle by allowing an operation input into the vehicle even when an active reaction part (3) is not operated. In one embodiment of this invention, the device comprises an operation input part (1) receiving an operational force, the active reaction part (3) generating, against an applied operating force, a reaction by an electrical control in the operation input part (1), and an active reaction releasing part (4) opening a force transmission route between the active reaction part (3) and the operation input part (1).Type: ApplicationFiled: December 10, 2003Publication date: May 17, 2007Inventors: Kentaro Ueno, Atsushi Yokoyama, Yuichi Kuramochi, Toshio Manaka, Mitsuhide Sasaki
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Publication number: 20060231074Abstract: For a pedal travel, a pedal reaction force, a driving force of a vehicle, and a braking force of a vehicle, different characteristics conformed to a stepping motion, a releasing motion, and a holding motion are determined on the basis of a pedal effort and predetermined characteristics of a pedal reaction force, and characteristics in a holding motion are changed according to vehicle information and environmental information.Type: ApplicationFiled: February 17, 2006Publication date: October 19, 2006Applicant: HITACHI, LTD.Inventors: Kentaro Ueno, Mitsuhide Sasaki
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Publication number: 20060219047Abstract: The present invention provides a pedal system designed to realize a vehicle output as intended by a driver without a sense of incompatibility and to deliver a vehicle output corresponding to how to depress a pedal, leading to the advantages as achieving easy operation of the pedal system in accordance with the traveling state of a vehicle; indefatigably driving; and improvement of the operational feeling, and also provides a vehicle system provided with such a pedal system. The pedal system realizes the operation with no sense of incompatibility relative to the depression of the pedal by ensuring that a hysteresis is provided in the relationship between the pedal effort and the vehicle output, and a portion of the relationship of a vehicle output or a vehicle output command relative to a pedal effort in a depressing motion or in a releasing motion is represented by making a relationship including a straight line (linear) or a folded line.Type: ApplicationFiled: February 16, 2006Publication date: October 5, 2006Applicant: Hitachi, Ltd.Inventors: Kentaro Ueno, Mitsuhide Sasaki
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Publication number: 20060224284Abstract: The invention provides a pedal system in which a preferable characteristic of a pedal and a preferable characteristic of a vehicle motion are achieved by changing a stiffness of the pedal and an outputting way of a vehicle output in accordance with a parameter on the basis of an operational information, a vehicle information and an environmental information, and a vehicle system with the pedal system. Even if the state of the vehicle changes, a gradient of the pedal reaction force or the vehicle output is changed in correspondence to the parameter without changing the pedal reaction force or the vehicle output.Type: ApplicationFiled: February 15, 2006Publication date: October 5, 2006Applicant: HITACHI, LTD.Inventors: Kentaro Ueno, Mitsuhide Sasaki
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Patent number: 7084761Abstract: There is provided a device in which surroundings of a building can be monitored using a sensor; when detecting an intruder, an object can be detected even in the case of bad weather; and a predetermined area can be monitored using as few sensors as possible. The device includes a security system which emits a radio wave from a building to a predetermined area outside the building to detect an object, and on the basis of output of the object detecting unit, a judgment is made as to whether or not the object will intrude into the predetermined area.Type: GrantFiled: August 23, 2002Date of Patent: August 1, 2006Assignee: Hitachi, Ltd.Inventors: Shiho Izumi, Hiroshi Kuroda, Satoru Kuragaki, Kazuhiko Sato, Terumi Nakazawa, Kenichi Mitzuishi, Kazuaki Takano, Mitsuhide Sasaki, Hiroshi Kondoh, Mikito Tsubota
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Publication number: 20030112142Abstract: There is provided a device in which surroundings of a building can be monitored using a sensor; when detecting an intruder, an object can be detected even in the case of bad weather; and a predetermined area can be monitored using as few sensors as possible. The device includes a security system which emits a radio wave from a building to a predetermined area outside the building to detect an object, and on the basis of output of the object detecting unit, a judgment is made as to whether or not the object will intrude into the predetermined area.Type: ApplicationFiled: August 23, 2002Publication date: June 19, 2003Applicant: Hitachi, Ltd.Inventors: Shiho Izumi, Hiroshi Kuroda, Satoru Kuragaki, Kazuhiko Sato, Terumi Nakazawa, Kenichi Mizuishi, Kazuaki Takano, Mitsuhide Sasaki, Hiroshi Kondoh, Mikito Tsubota
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Patent number: 5809152Abstract: An automatic sound suppression system is automatically disengaged whenever noise in an area and generated counter noise deviate in their reverse phase relationship or if the amplitude of the counter noise deviates from that of the noise. The system can also be automatically disengaged whenever divergence prediction means predicts that sounds of the noise and the counter noise diverge or whenever divergence prediction means predict that sounds of the noise and the counter noise are about to diverge. The system can also operate as a vibration reducing apparatus which is also automatically disengaged whenever divergence prediction means predicts that a vibration and a generated countervibration diverge.Type: GrantFiled: October 10, 1996Date of Patent: September 15, 1998Assignees: Hitachi, Ltd., Nissan Motor Co., Ltd.Inventors: Mitsuru Nakamura, Noriharu Sato, Mitsuhide Sasaki, Hiroyuki Saito, Toshiyuki Tabata, Satoshi Hasegawa