Patents by Inventor Yasuo Takahara
Yasuo Takahara 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: 8108106Abstract: A motion control system is applied to a vehicle, which has front wheel side suspensions with an anti-dive geometry and rear wheel side suspensions with an anti-lift geometry. When abrupt steering operation is started from a straight-ahead driving state of the vehicle in a non-operating period of a brake pedal of the vehicle, a controller controls a hydraulic unit such that a brake force is applied to a radially outer one of front left and right wheels, which is located on an outer side in a radial direction of an arc of turn of the vehicle upon starting the steering operation, and also to a radially inner one of rear left and right wheels, which is located on an inner side in the radial direction of the arc of the turn for a predetermined short time period.Type: GrantFiled: January 25, 2008Date of Patent: January 31, 2012Assignee: Advics Co., Ltd.Inventors: Yasuo Takahara, Haruo Arakawa, Takayuki Takeshita, Chihiro Nitta
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Patent number: 8046138Abstract: A braking control apparatus for a vehicle includes four wheel braking apparatuses for applying a braking torque to wheels, a first hydraulic pressure generating apparatus generating a hydraulic pressure, a vacuum booster generating an assist force for assisting a breaking operation, a first hydraulic circuit, a second hydraulic circuit, a second hydraulic pressure generating apparatus generating an assist hydraulic pressure that is added to the hydraulic pressure, a detecting portion for detecting a braking operation variable, a target value determining portion for determining a first assist hydraulic pressure target value and a second assist hydraulic pressure target value to be both greater than zero over a range where the braking operation variable is greater than a predetermined value at which the assist force by the vacuum booster is started, and a pressure regulating portion for regulating the assist hydraulic pressure to match the assist hydraulic pressure target value.Type: GrantFiled: April 25, 2011Date of Patent: October 25, 2011Assignee: Advics Co., Ltd.Inventors: Yoshiyuki Yasui, Yasuo Takahara, Takashi Sato, Kazuya Maki
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Patent number: 8046130Abstract: A motion control system is applied to a vehicle, which has front wheel side suspensions with an anti-dive geometry and rear wheel side suspensions with an anti-lift geometry. A degree of an anti-lift effect of the anti-lift geometry is larger than a degree of an anti-dive effect of the anti-dive geometry. Normally, a controller controls a hydraulic unit such that a brake force distribution between front wheels and rear wheels during a braking-period is adjusted to a basic distribution. In contrast, in a state where abrupt application of brakes is started, the controller controls the hydraulic unit such that the brake force distribution is adjusted to a first distribution, at which a brake force respectively applied to the rear wheels is larger than that of the basic distribution only for a predetermined short time period upon starting of the application of the brakes.Type: GrantFiled: January 25, 2008Date of Patent: October 25, 2011Assignee: Advics Co., Ltd.Inventors: Yasuo Takahara, Haruo Arakawa, Takayuki Takeshita, Chihiro Nitta
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Publication number: 20110198165Abstract: A braking control apparatus for a vehicle includes four wheel braking apparatuses for applying a braking torque to wheels, a first hydraulic pressure generating apparatus generating a hydraulic pressure, a vacuum booster generating an assist force for assisting a breaking operation, a first hydraulic circuit, a second hydraulic circuit, a second hydraulic pressure generating apparatus generating an assist hydraulic pressure that is added to the hydraulic pressure, a detecting portion for detecting a braking operation variable, a target value determining portion for determining a first assist hydraulic pressure target value and a second assist hydraulic pressure target value to be both greater than zero over a range where the braking operation variable is greater than a predetermined value at which the assist force by the vacuum booster is started, and a pressure regulating portion for regulating the assist hydraulic pressure to mach the assist hydraulic pressure target value.Type: ApplicationFiled: April 25, 2011Publication date: August 18, 2011Applicant: ADVICS CO., LTD.Inventors: Yoshiyuki Yasui, Yasuo Takahara, Takashi Sato, Kazuya Maki
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Patent number: 8000861Abstract: A braking control apparatus for a vehicle includes four wheel braking apparatuses for applying a braking torque to wheels, a first hydraulic pressure generating apparatus generating a hydraulic pressure, a vacuum booster generating an assist force for assisting a breaking operation, a first hydraulic circuit, a second hydraulic circuit, a second hydraulic pressure generating apparatus generating an assist hydraulic pressure that is added to the hydraulic pressure, a detecting portion for detecting a braking operation variable, a target value determining portion for determining a first assist hydraulic pressure target value and a second assist hydraulic pressure target value to be both greater than zero over a range where the braking operation variable is greater than a predetermined value at which the assist force by the vacuum booster is started, and a pressure regulating portion for regulating the assist hydraulic pressure to mach the assist hydraulic pressure target value.Type: GrantFiled: April 8, 2008Date of Patent: August 16, 2011Assignee: Advics Co., Ltd.Inventors: Yoshiyuki Yasui, Yasuo Takahara, Takashi Sato, Kazuya Maki
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Publication number: 20100174453Abstract: A motion control system is applied to a vehicle, which has front wheel side suspensions with an anti-dive geometry and rear wheel side suspensions with an anti-lift geometry. When abrupt steering operation is started from a straight-ahead driving state of the vehicle in a non-operating period of a brake pedal of the vehicle, a controller controls a hydraulic unit such that a brake force is applied to a radially outer one of front left and right wheels, which is located on an outer side in a radial direction of an arc of turn of the vehicle upon starting the steering operation, and also to a radially inner one of rear left and right wheels, which is located on an inner side in the radial direction of the arc of the turn for a predetermined short time period.Type: ApplicationFiled: January 25, 2008Publication date: July 8, 2010Inventors: Yasuo Takahara, Haruo Arakawa, Takayuki Takeshita, Chihiro Nitta
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Publication number: 20100168975Abstract: A motion control system is applied to a vehicle, which has front wheel side suspensions with an anti-dive geometry and rear wheel side suspensions with an anti-lift geometry. A degree of an anti-lift effect of the anti-lift geometry is larger than a degree of an anti-dive effect of the anti-dive geometry. Normally, a controller controls a hydraulic unit such that a brake force distribution between front wheels and rear wheels during a braking-period is adjusted to a basic distribution. In contrast, in a state where abrupt application of brakes is started, the controller controls the hydraulic unit such that the brake force distribution is adjusted to a first distribution, at which a brake force respectively applied to the rear wheels is larger than that of the basic distribution only for a predetermined short time period upon starting of the application of the brakes.Type: ApplicationFiled: January 25, 2008Publication date: July 1, 2010Inventors: Yasuo Takahara, Haruo Arakawa, Takayuki Takeshita, Chihiro Nitta
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Patent number: 7469974Abstract: During normal braking, a brake fluid supply route is used through which brake fluid is supplied from a master reservoir to wheel cylinders to using first to fourth pumps. When an abnormality occurs, a route is used through which a master cylinder pressure, which is generated by depressing a brake pedal, is transmitted through brake conduits to the wheel cylinders for both front wheels. First to fourth linear valves are provided in parallel with the first to fourth pumps, respectively, and during normal braking, the first to fourth linear valves are operated under duty control to adjust the wheel cylinder pressures that are generated in the wheel cylinders to, respectively.Type: GrantFiled: November 2, 2006Date of Patent: December 30, 2008Assignee: Advics Co., Ltd.Inventors: Kazuya Maki, Yasuo Takahara
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Publication number: 20080255732Abstract: A braking control apparatus for a vehicle includes four wheel braking apparatuses for applying a braking torque to wheels, a first hydraulic pressure generating apparatus generating a hydraulic pressure, a vacuum booster generating an assist force for assisting a breaking operation, a first hydraulic circuit, a second hydraulic circuit, a second hydraulic pressure generating apparatus generating an assist hydraulic pressure that is added to the hydraulic pressure, a detecting portion for detecting a braking operation variable, a target value determining portion for determining a first assist hydraulic pressure target value and a second assist hydraulic pressure target value to be both greater than zero over a range where the braking operation variable is greater than a predetermined value at which the assist force by the vacuum booster is started, and a pressure regulating portion for regulating the assist hydraulic pressure to mach the assist hydraulic pressure target value.Type: ApplicationFiled: April 8, 2008Publication date: October 16, 2008Inventors: Yoshiyuki Yasui, Yasuo Takahara, Takashi Sato, Kazuya Maki
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Publication number: 20070188021Abstract: A control portion stores an actual brake force distribution characteristic line indicating relation between a front brake force allocated to the front wheel and a rear brake force allocated to the rear wheel, wherein the actual brake force distribution characteristic line is determined based on an ideal brake force distribution characteristic line so that, in achieving a given deceleration, a ratio of the front brake force to the rear brake force becomes smaller in the case that the distribution is calculated by using the actual brake force distribution characteristic line than in the case that the distribution is calculated by using the ideal brake force distribution characteristic line. The control portion calculates the distribution by using the actual brake force distribution characteristic line and determines, based on the calculated distribution, the wheel cylinder pressures to be generated at the front wheel cylinder the rear wheel cylinder.Type: ApplicationFiled: February 1, 2007Publication date: August 16, 2007Applicant: ADVICS CO., LTD.Inventors: Kazuya Maki, Yasuo Takahara
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Publication number: 20070114844Abstract: During normal braking, a brake fluid supply route is used through which brake fluid is supplied from a master reservoir to wheel cylinders to using first to fourth pumps. When an abnormality occurs, a route is used through which a master cylinder pressure, which is generated by depressing a brake pedal, is transmitted through brake conduits to the wheel cylinders for both front wheels. First to fourth linear valves are provided in parallel with the first to fourth pumps, respectively, and during normal braking, the first to fourth linear valves are operated under duty control to adjust the wheel cylinder pressures that are generated in the wheel cylinders to, respectively.Type: ApplicationFiled: November 2, 2006Publication date: May 24, 2007Inventors: Kazuya Maki, Yasuo Takahara
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Patent number: 6871670Abstract: In a metal bellows accumulator, a metallic bellows unit is disposed within a pressure space defined in a main shell, and one end of the metallic bellows unit is fixedly secured to one end wall of the main shell. The metallic bellows unit sections the pressure space into an outer chamber serving as a gas chamber in which a pressurized gas is enclosed, and an inner chamber serving as a liquid chamber communicating with a liquid port formed in the end wall of the main shell. A stopper (auxiliary shell) for limiting collapsing movement of the metallic bellows unit is disposed within the liquid chamber and has a communication passage hole. The liquid port always communicates with a liquid chamber to which an inner circumferential surface of a bellows portion of the metallic bellows unit is exposed via the communication passage hole.Type: GrantFiled: May 28, 2003Date of Patent: March 29, 2005Assignee: Advics Co., Ltd.Inventors: Kenichi Suzuki, Yasuo Takahara, Hiroshi Kondo, Toshihiko Kawamura
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Publication number: 20040244857Abstract: In a metal bellows accumulator, a metallic bellows unit is disposed within a pressure space defined in a main shell, and one end of the metallic bellows unit is fixedly secured to one end wall of the main shell. The metallic bellows unit sections the pressure space into an outer chamber serving as a gas chamber in which a pressurized gas is enclosed, and an inner chamber serving as a liquid chamber communicating with a liquid port formed in the end wall of the main shell. A stopper (auxiliary shell) for limiting collapsing movement of the metallic bellows unit is disposed within the liquid chamber and has a communication passage hole. The liquid port always communicates with a liquid chamber to which an inner circumferential surface of a bellows portion of the metallic bellows unit is exposed via the communication passage hole.Type: ApplicationFiled: April 12, 2004Publication date: December 9, 2004Inventors: Kenichi Suzuki, Yasuo Takahara, Hiroshi Kondo, Toshihiko Kawamura
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Patent number: 6231315Abstract: A compressor includes a cylinder block and a housing connected to the ends of the cylinder block. A suction chamber and a discharge chamber are defined in the housing, respectively, and the chambers are divided by a bulkhead, or wall. A valve plate, which has a discharge port for connecting the cylinder bores with the discharge chamber, is positioned between the cylinder block and the housing. A discharge valve is provided for selectively opening and closing the discharge port. A gasket is positioned between the housing and the valve plate, and the gasket is held to the bulkhead. The gasket has a bulkhead seal portion, which is between the bulkhead and the valve plate for sealing between the discharge chamber and the suction chamber, and a protruding portion, which protrudes radially beyond the bulkhead, extending along and contacting the valve plate.Type: GrantFiled: June 23, 1997Date of Patent: May 15, 2001Assignees: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho, Denso CorporationInventors: Hayato Ikeda, Noriyuki Shintoku, Masaaki Nishimoto, Satoru Kuramoto, Yasuo Takahara
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Patent number: 5899811Abstract: A device for transmitting rotational power from an automobile engine to a compressor for use in an automobile air conditioning system is provided. The device includes a pulley, which is supported on a housing of the compressor for rotation, for receiving rotational power from the automobile engine, and a hub connected to the drive shaft. At least one elastic member which defines outer and inner peripheral surfaces is provided. A first holder member is provided along the outer periphery of the hub for holding the elastic member. A second holder member, which is connected to the pulley, is provided for holding the elastic member. The first and second holder members radially cooperate with each other to circumferentially hold the elastic member during normal operation to transmit the rotation. The first and second holder members are disconnected by deformation of the at least one elastic member when a relative rotation between the pulley and drive shaft occurs.Type: GrantFiled: February 27, 1997Date of Patent: May 4, 1999Assignee: Denso CorporationInventors: Akira Kishibuchi, Kiyomi Okuda, Yasuo Takahara
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Patent number: 5683299Abstract: A device for transmitting rotational power from a rotational power source to a rotational driven member is provided with a first rotating member provided for rotation in a rotational direction about an axis, and a second rotating member provided for rotation about the same axis. The first rotating member is connected to the rotational power source and the second rotating member is connected to the rotational driven member. An mechanism for rotationally connecting the first and second rotating member is provided. The connecting mechanism is provided with at least one elastic member made of a rubber material; a first holder member for holding the elastic member from the radially outside of the elastic member; and a second holder member for holding the elastic member from the radially inside of the elastic member. The first and second holder members are mounted to one of the first and second rotating members.Type: GrantFiled: September 13, 1995Date of Patent: November 4, 1997Assignee: Nippondenso Co., Ltd.Inventors: Akira Kishibuchi, Kiyomi Okuda, Junichi Toyama, Yasuo Takahara, Kazuo Oyobe
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Patent number: 4941437Abstract: An automotive radiator cooling system has a radiator cooling fan driven by a hydraulic motor actuated by a pressurized fluid fed through a hydraulic circuit from an engine-driven hydraulic pump. A bypass line extends in bypassing relationship to the hydraulic motor and has ends connected to the circuit upstream and downstream of the hydraulic motor, respectively. A check valve is provided in the bypass line and is operative to allow a flow of the fluid from a reservoir through the bypass line back into a part of the circuit upstream of the motor only when a pressure drop takes place in that part of the circuit due to free rotation of the cooling fan, and thus of the motor, independently of the drive by the hydraulic pump. The backward flow of the fluid is operative to compensate for the pressure drop to prevent the occurrence of cavitation in the circuit upstream of the motor. Desirably, the bypass line is incorporated into the housing of the hydraulic motor.Type: GrantFiled: June 21, 1988Date of Patent: July 17, 1990Assignees: Nippondenso Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Yasushi Suzuki, Yasuo Takahara, Atusi Masui, Toshihiro Ohshima, Fumihiro Takeuchi, Toshiki Sugiyama, Tadashi Setoguchi
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Patent number: 4285317Abstract: An exhaust gas recirculation system for an internal combustion engine in which an exhaust gas control valve and a pressure regulating valve is constructed as one body to facilitate the mounting of the system on the engine and to improve the response characteristic of the system. Also, the chamber of the pressure regulating valve opposite to the chamber for receiving the exhaust gas is subjected to a pressure which is controlled in corresponding to the state of engine operation such as load, engine speed or the like, so that the rate of the exhaust gas recirculation is controlled in accordance with the state of engine operation.Type: GrantFiled: December 19, 1979Date of Patent: August 25, 1981Assignees: Nippondenso Co., Ltd., Toyota Jidosha Kogyo Kabushiki KaishaInventors: Yasuo Takahara, Shigeo Hayashi, Shizuo Yamada, Norio Shibata