Patents by Inventor Akitaka Nishio
Akitaka Nishio 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).
-
Patent number: 9919687Abstract: Vibrations of a hydraulic pressure in an upstream portion due to operations of a slip control device during anti-lock control are transmitted to a control pressure chamber via a pressurizing piston of a master cylinder and a control piston of a regulator. During anti-lock control, in contrast, a pressure-increase linear valve and a pressure-reduction linear valve are opened, allowing change in volume of the control pressure chamber, resulting in reduction in stiffness. This reduction suppresses vibrations of a hydraulic pressure in the control pressure chamber, resulting in suppression of vibrations of a hydraulic pressure in a front pressure chamber. As a result, it is possible to reduce the lowering in control accuracy for a hydraulic pressure in a brake cylinder in anti-lock control using the hydraulic pressure in the front pressure chamber, which can well avoid a long braking distance.Type: GrantFiled: May 12, 2014Date of Patent: March 20, 2018Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.Inventors: Yusuke Kamiya, Masaaki Komazawa, Kiyoyuki Uchida, Masaki Ninoyu, Akitaka Nishio, Masaki Maruyama
-
Patent number: 9714017Abstract: The brake controller includes a friction brake device, a regeneration brake device, a required braking force calculating portion, a vehicle motion control portion which distributes the required braking force to the non-regeneration braking side right/left wheels that is either one of the right/left front wheels and right/left rear wheels, a maximum braking force calculating portion which calculates the maximum braking force at each wheel and a braking force control portion-which calculates the regeneration braking force generated at the regeneration braking side right/left wheels within a range where the regeneration braking force to be generated at the regeneration braking side right/left wheels does not exceed a smaller value of the maximum braking forces of the regeneration braking side right/left wheels, based on the required braking force and the distribution of the braking force to the non-regeneration braking side right/left wheels.Type: GrantFiled: March 7, 2014Date of Patent: July 25, 2017Assignees: ADVICS CO., LTD., TOYOTA JIDOSHI KABUSHIKI KAISHAInventors: Takahiro Okano, Akitaka Nishio, Yusuke Kamiya, Masaaki Komazawa
-
Patent number: 9656644Abstract: The braking control device for controlling a master cylinder device includes a housing, an output piston, an input piston, a separation chamber opening and closing portion, and a driving hydraulic pressure generating portion, and is provided with an operation control for controlling the master cylinder device in an operation force operating state (regulator mode) in which the output piston is driven by operation force on a brake operation member and in a driving hydraulic pressure operating state (linear mode) in which the output piston is driven by driving hydraulic pressure from the driving hydraulic pressure generating portion; a brake operation judgment portion for judging the presence or absence of a brake operation and the probability thereof and a state transition limiter for limiting at least one of state transitions between the operating states when the presence of the brake operation and possibility thereof is determined.Type: GrantFiled: April 26, 2013Date of Patent: May 23, 2017Assignee: ADVICS CO., LTD.Inventors: Masaki Maruyama, Kazutaka Noro, Tatsushi Kobayashi, Yasunori Sakata, Akitaka Nishio, Masaaki Komazawa, Yusuke Kamiya, Kiyoyuki Uchida
-
Patent number: 9494172Abstract: A vehicle brake device is provided with a master cylinder, a master piston slidably arranged in the master cylinder, an input piston slidably arranged in the master cylinder to be separated from the master piston and defining a separation chamber, an input piston moving amount detecting section for detecting the moving amount of the input piston, a master piston moving amount calculating section for calculating the moving amount of the master piston based on the moving amount of the input piston, and a contact inferring section for inferring the contact of the input piston with the master piston based on the moving amount of the input piston and the moving amount of the master piston.Type: GrantFiled: March 25, 2013Date of Patent: November 15, 2016Assignee: ADVICS CO., LTD.Inventors: Masaki Maruyama, Yoshio Masuda, Akitaka Nishio, Kiyoyuki Uchida, Masaaki Komazawa, Akira Sakai, Yasuji Mizutani, Yusuke Kamiya
-
Publication number: 20160280191Abstract: The brake controller includes a friction brake device, a regeneration brake device, a required braking force calculating portion, a vehicle motion control portion which distributes the required braking force to the non-regeneration braking side right/left wheels that is either one of the right/left front wheels and right/left rear wheels, a maximum braking force calculating portion which calculates the maximum braking force at each wheel and a braking force control portion-which calculates the regeneration braking force generated at the regeneration braking side right/left wheels within a range where the regeneration braking force to be generated at the regeneration braking side right/left wheels does not exceed a smaller value of the maximum braking forces of the regeneration braking side right/left wheels, based on the required braking force and the distribution of the braking force to the non-regeneration braking side right/left wheels.Type: ApplicationFiled: March 7, 2014Publication date: September 29, 2016Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.Inventors: Takahiro OKANO, Akitaka NISHIO, Yusuke KAMIYA, Masaaki KOMAZAWA
-
Publication number: 20160200301Abstract: Vibrations of a hydraulic pressure in an upstream portion due to operations of a slip control device during anti-lock control are transmitted to a control pressure chamber via a pressurizing piston of a master cylinder and a control piston of a regulator. During anti-lock control, in contrast, a pressure-increase linear valve and a pressure-reduction linear valve are opened, allowing change in volume of the control pressure chamber, resulting in reduction in stiffness. This reduction suppresses vibrations of a hydraulic pressure in the control pressure chamber, resulting in suppression of vibrations of a hydraulic pressure in a front pressure chamber. As a result, it is possible to reduce the lowering in control accuracy for a hydraulic pressure in a brake cylinder in anti-lock control using the hydraulic pressure in the front pressure chamber, which can well avoid a long braking distance.Type: ApplicationFiled: May 12, 2014Publication date: July 14, 2016Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.Inventors: Yusuke KAMIYA, Masaaki KOMAZAWA, Kiyoyuki UCHIDA, Masaki NINOYU, Akitaka NISHIO, Masaki MARUYAMA
-
Patent number: 9296376Abstract: A vehicle brake system is provided with a hydraulic brake device, a regenerative brake device incorporating a generator motor, and a brake control device. The control device includes a section for calculating a driver target brake force for each wheel corresponding to a manipulation amount of a braking manipulation member, a section for enabling the brake control device itself to set compensation brake forces for respective wheels, a section for selecting a larger one of the driver target brake force and the compensation brake force for each wheel and for subtracting a base hydraulic brake force from the selected brake force to set differences for respective wheels as compensated target brake forces for the wheels, and a section for controlling the distribution of the compensated target brake force for each wheel to a controlled hydraulic brake force for each wheel and a regenerative brake force for each driving wheel.Type: GrantFiled: November 27, 2013Date of Patent: March 29, 2016Assignee: ADVICS CO., LTD.Inventors: Akitaka Nishio, Masahiro Matsuura, Masayuki Naito
-
Publication number: 20150321652Abstract: The braking control device for controlling a master cylinder device includes a housing, an output piston, an input piston, a separation chamber opening and closing portion, and a driving hydraulic pressure generating portion, and is provided with an operation control for controlling the master cylinder device in an operation force operating state (regulator mode) in which the output piston is driven by operation force on a brake operation member and in a driving hydraulic pressure operating state (linear mode) in which the output piston is driven by driving hydraulic pressure from the driving hydraulic pressure generating portion; a brake operation judgment portion for judging the presence or absence of a brake operation and the probability thereof and a state transition limiter for limiting at least one of state transitions between the operating states when the presence of the brake operation and possibility thereof is determined.Type: ApplicationFiled: April 26, 2013Publication date: November 12, 2015Inventors: Masaki MARUYAMA, Kazutaka NORO, Tatsushi KOBAYASHI, Yasunori SAKATA, Akitaka NISHIO, Masaaki KOMAZAWA, Yusuke KAMIYA, Kiyoki UCHIDA
-
Patent number: 9163645Abstract: A vehicle brake system includes a cylinder, a master piston including a pressure applying piston and a projection portion, a servo chamber, a contact/separation determining means determining a separated state and a contact state between the input piston and the master piston, a pilot pressure generating device generating a pilot pressure, a servo pressure generating device, a servo pressure measuring device measuring a servo pressure, and a master pressure estimating means estimating a master pressure from the pilot pressure and a first servo ratio, which is a cross-sectional area ratio between a first pilot chamber and a servo pressure generating chamber, in a case of the separated state, and estimating the master pressure based on the servo pressure, the pilot pressure and a second servo ratio, which is a cross-sectional area ratio between a second pilot chamber and the servo pressure generating chamber, in a case of the contact state.Type: GrantFiled: March 22, 2013Date of Patent: October 20, 2015Assignee: ADVICS CO., LTD.Inventors: Masaki Maruyama, Yoshio Masuda, Akitaka Nishio, Akira Sakai, Yasuji Mizutani, Kiyoyuki Uchida, Masaaki Komazawa, Yusuke Kamiya
-
Patent number: 9108515Abstract: A vehicle brake device comprises a hydraulic brake device, a regeneration brake device and a brake control device. The brake control device further includes a final value calculating device for calculating the target braking force FR at the time when an ABS control period ended and the cooperative control device restarted the operation to be as a regeneration allowing braking force FH, when the anti-lock brake control device has operated for the ABS control period within one braking operation period where the brake operating member is continuously operated and a regeneration allowing device operable after the ABS control period ended within the one braking operation period and after the cooperative control device restarted the operation and allowing the generation of the regeneration braking force FE only when the target braking force is less than a value of the regeneration allowing braking force FH.Type: GrantFiled: July 23, 2012Date of Patent: August 18, 2015Assignee: ADVICS CO., LTD.Inventors: Akitaka Nishio, Masayuki Naito, Masahiro Matsuura
-
Patent number: 8985713Abstract: Vehicle brake system comprises a hydraulic brake device, a regenerative brake device to drive wheels driven by a generator-motor and a brake control device for cooperatively controlling the hydraulic brake force and the regenerative brake force in response to an operation amount of a brake operation member. This vehicle brake system further includes a differential amount calculating portion calculating a differential amount by subtracting a regeneration execution brake force obtained by execution of the generator-motor from a regeneration request brake force, a regenerative range judging portion for judging whether the regeneration request brake force is within a range of a re-generable brake force which is executable by the generator-motor and a hydraulic pressure restricting portion for restricting increase of the hydraulic brake force when the differential amount is a positive value and the regeneration request brake force is within the range of the re-generable brake force.Type: GrantFiled: September 27, 2011Date of Patent: March 24, 2015Assignee: Advics Co., Ltd.Inventors: Masayuki Naito, Masahiro Matsuura, Akitaka Nishio
-
Publication number: 20140250883Abstract: A vehicle brake system includes a cylinder, a master piston including a pressure applying piston and a projection portion, a servo chamber, a contact/separation determining means determining a separated state and a contact state between the input piston and the master piston, a pilot pressure generating device generating a pilot pressure, a servo pressure generating device, a servo pressure measuring device measuring a servo pressure, and a master pressure estimating means estimating a master pressure from the pilot pressure and a first servo ratio, which is a cross-sectional area ratio between a first pilot chamber and a servo pressure generating chamber, in a case of the separated state, and estimating the master pressure based on the servo pressure, the pilot pressure and a second servo ratio, which is a cross-sectional area ratio between a second pilot chamber and the servo pressure generating chamber, in a case of the contact state.Type: ApplicationFiled: March 22, 2013Publication date: September 11, 2014Inventors: Masaki Maruyama, Yoshio Masuda, Akitaka Nishio, Akira Sakai, Yasuji Mizutani, Kiyoyuki Uchida, Masaaki Komazawa, Yusuke Kamiya
-
Publication number: 20140145499Abstract: A vehicle brake system is provided with a hydraulic brake device, a regenerative brake device incorporating a generator motor, and a brake control device. The control device includes a section for calculating a driver target brake force for each wheel corresponding to a manipulation amount of a braking manipulation member, a section for enabling the brake control device itself to set compensation brake forces for respective wheels, a section for selecting a larger one of the driver target brake force and the compensation brake force for each wheel and for subtracting a base hydraulic brake force from the selected brake force to set differences for respective wheels as compensated target brake forces for the wheels, and a section for controlling the distribution of the compensated target brake force for each wheel to a controlled hydraulic brake force for each wheel and a regenerative brake force for each driving wheel.Type: ApplicationFiled: November 27, 2013Publication date: May 29, 2014Applicant: Advics Co., Ltd.Inventors: Akitaka NISHIO, Masahiro Matsuura, Masayuki Naito
-
Patent number: 8700282Abstract: A method and apparatus for controlling a vehicle involves determining if the vehicle is swaying and if the vehicle is swaying, reducing a torque of an engine of the vehicle and/or applying independent braking forces to each wheel of the vehicle. A vehicle for controlling vehicle sway includes an engine, a plurality of wheels, a braking system configured to apply independent braking forces to each wheel, and a controller configured to control the engine and the braking system. The controller is configured to determine a correlation coefficient in accordance with any phase shift occurring between a yaw acceleration signal and a lateral acceleration signal. The correlation coefficient is compared to a threshold value to determine whether the vehicle is swaying. If the vehicle is swaying, the controller causes a torque of the engine to be reduced and/or braking forces to be applied independently to each wheel.Type: GrantFiled: July 28, 2011Date of Patent: April 15, 2014Assignee: Advics Co., Ltd.Inventors: Akitaka Nishio, Kenji Asano, Hisashi Kajita
-
Publication number: 20140095046Abstract: A vehicle brake device comprises a hydraulic brake device, a regeneration brake device and a brake control device. The brake control device further includes a final value calculating device for calculating the target braking force FR at the time when an ABS control period ended and the cooperative control device restarted the operation to be as a regeneration allowing braking force FH, when the anti-lock brake control device has operated for the ABS control period within one braking operation period where the brake operating member is continuously operated and a regeneration allowing device operable after the ABS control period ended within the one braking operation period and after the cooperative control device restarted the operation and allowing the generation of the regeneration braking force FE only when the target braking force is less than a value of the regeneration allowing braking force FH.Type: ApplicationFiled: July 23, 2012Publication date: April 3, 2014Applicant: ADVICS CO., LTD.Inventors: Akitaka Nishio, Masayuki Naito, Masahiro Matsuura
-
Patent number: 8575288Abstract: A curable resin composition is provided which uses a fumarate copolymer which is excellent in thermal discoloration resistance as a binder component and is capable of forming details of a color filter. The curable resin composition of the present invention is a photocurable resin composition for forming a protective layer, RGB pixels, a black matrix or a spacer of a color filter, and contains as a binder component a fumarate copolymer having at least a molecular structure wherein a constituent unit represented by the following Formula 1 and a constituent unit having an acidic functional group(s) are linked, preferably further having a constituent unit with an ethylenically unsaturated bond: wherein, each of R1 and R2 is independently a branched C3-8 alkyl group which may be substituted, or a C4-8 cycloalkyl group which may be substituted.Type: GrantFiled: May 21, 2003Date of Patent: November 5, 2013Assignees: Dai Nippon Printing Co., Ltd., NOF CorporationInventors: Shinji Hayashi, Akitaka Nishio, Masami Okuo, Kensaku Sonoda, Chihiro Imase, Yoshikazu Nakashima
-
Publication number: 20130255249Abstract: A vehicle brake device is provided with a master cylinder, a master piston slidably arranged in the master cylinder, an input piston slidably arranged in the master cylinder to be separated from the master piston and defining a separation chamber, an input piston moving amount detecting section for detecting the moving amount of the input piston, a master piston moving amount calculating section for calculating the moving amount of the master piston based on the moving amount of the input piston, and a contact inferring section for inferring the contact of the input piston with the master piston based on the moving amount of the input piston and the moving amount of the master piston.Type: ApplicationFiled: March 25, 2013Publication date: October 3, 2013Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN SEIKI KABUSHIKI KAISHAInventors: Masaki Maruyama, Yoshio Masuda, Akitaka Nishio, Kiyoyuki Uchida, Masaaki Komazawa, Akira Sakai, Yasuji Mizutani, Yusuke Kamiya
-
Publication number: 20130030665Abstract: A method and apparatus for controlling a vehicle involves determining if the vehicle is swaying and if the vehicle is swaying, reducing a torque of an engine of the vehicle and/or applying independent braking forces to each wheel of the vehicle. A vehicle for controlling vehicle sway includes an engine, a plurality of wheels, a braking system configured to apply independent braking forces to each wheel, and a controller configured to control the engine and the braking system. The controller is configured to determine a correlation coefficient in accordance with any phase shift occurring between a yaw acceleration signal and a lateral acceleration signal. The correlation coefficient is compared to a threshold value to determine whether the vehicle is swaying. If the vehicle is swaying, the controller causes a torque of the engine to be reduced and/or braking forces to be applied independently to each wheel.Type: ApplicationFiled: July 28, 2011Publication date: January 31, 2013Applicants: ADVICS North America, TOYOTA JIDOSHA KABUSHIKI KAISHA, ADVICS CO., LTD.Inventors: Akitaka NISHIO, Kenji ASANO, Hisashi KAJITA
-
Patent number: 8211599Abstract: A green pigment for a color filter including a phthalocyanine green pigment and capable of expressing a region of xy-chromaticity coordinate enclosed by predetermined equations 1, 2 and 3 defined by the XYZ color system of the CIE when the green pigment is solely subjected to colorimetry. Moreover, using the above-mentioned green pigment, it provides a photosensitive color composition capable of forming a color filter having a wide color reproduction range and a high transmittance. Furthermore, it provides a color filter having a wide color reproduction range and a high transmittance with a green pixel formed using the above mentioned photosensitive color composition, and a liquid crystal panel using the color filter.Type: GrantFiled: July 13, 2010Date of Patent: July 3, 2012Assignees: Dai Nippon Printing Co., Ltd., Dic CorporationInventors: Masahiro Tatsuzawa, Shunsuke Sega, Akitaka Nishio, Arata Kudou, Eiichi Kiuchi, Hiroshi Katsube
-
Publication number: 20120074768Abstract: Vehicle brake system comprises a hydraulic brake device, a regenerative brake device to drive wheels driven by a generator-motor and a brake control device for cooperatively controlling the hydraulic brake force and the regenerative brake force in response to an operation amount of a brake operation member. This vehicle brake system further includes a differential amount calculating portion calculating a differential amount by subtracting a regeneration execution brake force obtained by execution of the generator-motor from a regeneration request brake force, a regenerative range judging portion for judging whether the regeneration request brake force is within a range of a re-generable brake force which is executable by the generator-motor and a hydraulic pressure restricting portion for restricting increase of the hydraulic brake force when the differential amount is a positive value and the regeneration request brake force is within the range of the re-generable brake force.Type: ApplicationFiled: September 27, 2011Publication date: March 29, 2012Applicant: ADVICS CO., LTD.Inventors: Masayuki Naito, Masahiro Matsuura, Akitaka Nishio