Patents by Inventor Takehito Fujii
Takehito Fujii 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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Publication number: 20090071736Abstract: A vehicle control system calculates driver-required wheel torque, correction wheel torque to stabilize vehicle motion, required output shaft torque, alternator base torque, target engine torque and alternator torque to realize the output shaft torque. The required output shaft torque is required to realize vehicle motion, and the alternator base torque is required to maintain amounts of electric power in batteries. In order to realize the torque including wide band frequency torque, a torque division unit divides the sum of the torque into each torque actuator response frequency torque. Therefore, the target alternator torque is calculated by the alternator base torque to maintain electric power in batteries and high frequency band torque required by vehicle motion control.Type: ApplicationFiled: September 9, 2008Publication date: March 19, 2009Applicant: DENSO CORPORATIONInventors: Katsuyuki Mori, Mamoru Sawada, Toshiki Matsumoto, Takehito Fujii
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Publication number: 20080319628Abstract: An acceleration control system stores a target acceleration calculation equation acquired by transforming an equation that expresses that a product of the differentiation of the square power of the speed and the environmental factor ?env represents a sensed value ? of acceleration. A surrounding environment monitor device detects surrounding bodies present in the forward periphery of the vehicle, and an environmental factor calculation unit calculates the environmental factor ?env by using the detected positions of the surrounding bodies. A target acceleration setting unit successively sets target accelerations aref in compliance with the target acceleration calculation equation by using the environmental factor ?env. The acceleration is executed to match the driver's feeling.Type: ApplicationFiled: June 24, 2008Publication date: December 25, 2008Applicant: DENSO CORPORATIONInventors: Hiroshi Inou, Minoru Okada, Takehito Fujii, Seiji Totsuka
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Patent number: 7457697Abstract: A vehicle integration control system includes a manager controller and a driving system controller. The manager controller sets a target generation driving force guide value for a driving force outputted from a driving system of a vehicle. The driving system controller controls the driving force on the basis of the target generation driving force guide value. The manager controller includes a driver request value setter and a driving force corrector. The driver request value setter sets a driver request generation driving force value corresponding to the driving force outputted from the driving system on the basis of a driver's input. The driving force corrector corrects the driver request generation driving force value on the basis of a predetermined program to restrain vibration generated in the vehicle when the driving force outputted from the driving system.Type: GrantFiled: December 21, 2004Date of Patent: November 25, 2008Assignee: DENSO CorporationInventors: Mamoru Sawada, Toshiki Matsumoto, Tsutomu Tashiro, Mamoru Mabuchi, Takehito Fujii, Motoaki Kataoka
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Publication number: 20080249690Abstract: A vehicle control system controls vibrations that are generated at a plurality of portions of a vehicle. An engine/drive system ECU and a brake system ECU store the same vehicle vibration model that is separated into a vehicle body vibration model, a chassis vibration model and a tire vibration model, respectively. The engine/drive system ECU controls the suppression of the vehicle body vibrations that are estimated from the vehicle vibration model and the brake system ECU controls the suppression of the chassis vibrations and the tire vibrations. Accordingly, it is easy to execute control for suppressing the respective vibrations.Type: ApplicationFiled: April 2, 2008Publication date: October 9, 2008Applicant: DENSO CORPORATIONInventors: Toshiki Matsumoto, Mamoru Sawada, Takehito Fujii
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Patent number: 7328097Abstract: While a driving torque TD outputted to a driving shaft via an AT from an engine is detected, a road-surface transmitting torque Td_tire is detected based on rotation speeds Vwdr, Vwdl of vehicle driving wheels, a vehicle body speed Vd, and driving torques Tdr, Tdl, all of which are previously detected. The driving torque TD and the road-surface transmitting torque Td_tire are then compared to each other. When TD>Td_tire, the driving torque from an engine is controlled so as to decrease a value of (TD?Td_tire). The vibrations of individual vehicle parts are thereby decreased.Type: GrantFiled: November 8, 2004Date of Patent: February 5, 2008Assignee: DENSO CorporationInventors: Mamoru Sawada, Toshiki Matsumoto, Tsutomu Tashiro, Mamoru Mabuchi, Takehito Fujii
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Publication number: 20080027645Abstract: A method and an apparatus for estimating behaviors of a vehicle are provided. At least two GPS antennas are located along a longitudinal axis of a vehicle so that speed vectors at the positions where the GPS antennas are located can be determined based on GPS signals received by the GPS antennas. The speed vectors are known to be estimated with high accuracy based on the GPS signals. The positions of the GPS antennas on the local coordinate system are estimated based on such highly accurate speed vectors, so that the estimated positions may also have high accuracy. Based on a line connecting these highly accurate positions of the GPS antennas, an inclination of the longitudinal axis of the vehicle is estimated. Use of the high-accuracy speed vectors enables high-accuracy estimation on the positions of the GPS antennas and the vehicle direction on the local coordinate system.Type: ApplicationFiled: July 26, 2007Publication date: January 31, 2008Inventors: Minoru Okada, Mamoru Sawada, Takehito Fujii, Hiromichi Tanaka
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Patent number: 7241249Abstract: In a driving condition control system, a sensing unit is configured to sense a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly. A correcting unit is configured to correct the torque according to the sensed first and second physical quantities of the rotations of the first and second rotational axle assemblies. This allows the torque to be precisely obtained.Type: GrantFiled: June 17, 2004Date of Patent: July 10, 2007Assignee: DENSO CORPORATIONInventors: Mamoru Sawada, Toshiki Matsumoto, Tsutomu Tashiro, Mamoru Mabuchi, Takehito Fujii, Motoaki Kataoka
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Patent number: 7169083Abstract: In a driving condition control system, a sensing unit senses a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly. A determining unit compares the first and second physical quantities of the rotations of the first and second rotational axle assemblies and determines whether a driving condition of the vehicle is unstable according to the compared result. As a result, the unstable condition of the vehicle can be rapidly detected without detecting a yaw moment of the vehicle.Type: GrantFiled: June 17, 2004Date of Patent: January 30, 2007Assignee: Denso CorporationInventors: Mamoru Sawada, Toshiki Matsumoto, Tsutomu Tashiro, Mamoru Mabuchi, Takehito Fujii, Motoaki Kataoka
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Patent number: 7079929Abstract: In a power steering apparatus employing an EPS (electrical power steering) motor coupled to a steering mechanism, when vibration of the steering mechanism is produced by twisting of tire rubber due to changes in steering angle, resultant pulsation of the drive current of the EPS motor are suppressed by adding to the drive current a current that is of equal frequency and opposite phase to the pulsation. Vibration of the EPS motor shaft, and resultant vibration of the steering wheel and vehicle body, are thereby effectively suppressed.Type: GrantFiled: July 13, 2004Date of Patent: July 18, 2006Assignee: Denso CorporationInventors: Mamoru Sawada, Toshiki Matsumoto, Tsutomu Tashiro, Mamoru Mabuchi, Takehito Fujii, Motoaki Kataoka
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Publication number: 20060041353Abstract: A vehicle stability control system uses a physical quantity corresponding to a driver accelerator input to control engine power produced by an engine and to controllably drive an engine load device for regulating the engine power to produce a desired drive force. The vehicle stability control system includes a vibration detector and a corrector. The vibration detector determines a vibration that occurs during running of the vehicle to disturb the stability of the vehicle. The corrector drives the engine load device to suppress the vibration in response to the vibration determined by the vibration detector.Type: ApplicationFiled: August 11, 2005Publication date: February 23, 2006Applicant: DENSO CorporationInventors: Mamoru Sawada, Toshiki Matsumoto, Takehito Fujii, Tsutomu Tashiro
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Publication number: 20050143896Abstract: A vehicle integration control system includes a manager controller and a driving system controller. The manager controller sets a target generation driving force guide value for a driving force outputted from a driving system of a vehicle. The driving system controller controls the driving force on the basis of the target generation driving force guide value. The manager controller includes a driver request value setter and a driving force corrector. The driver request value setter sets a driver request generation driving force value corresponding to the driving force outputted from the driving system on the basis of a driver's input. The driving force corrector corrects the driver request generation driving force value on the basis of a predetermined program to restrain vibration generated in the vehicle when the driving force outputted from the driving system.Type: ApplicationFiled: December 21, 2004Publication date: June 30, 2005Inventors: Mamoru Sawada, Toshiki Matsumoto, Tsutomu Tashiro, Mamoru Mabuchi, Takehito Fujii, Motoaki Kataoka
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Publication number: 20050102087Abstract: While a driving torque TD outputted to a driving shaft via an AT from an engine is detected, a road-surface transmitting torque Td_tire is detected based on rotation speeds Vwdr, Vwdl of vehicle driving wheels, a vehicle body speed Vd, and driving torques Tdr, Tdl, all of which are previously detected. The driving torque TD and the road-surface transmitting torque Td_tire are then compared to each other. When TD>Td_tire, the driving torque from an engine is controlled so as to decrease a value of (TD?Td_tire). The vibrations of individual vehicle parts are thereby decreased.Type: ApplicationFiled: November 8, 2004Publication date: May 12, 2005Inventors: Mamoru Sawada, Toshiki Matsumoto, Tsutomu Tashiro, Mamoru Mabuchi, Takehito Fujii
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Publication number: 20050027417Abstract: In a power steering apparatus employing an EPS (electrical power steering) motor coupled to a steering mechanism, when vibration of the steering mechanism is produced by twisting of tire rubber due to changes in steering angle, resultant pulsation of the drive current of the EPS motor are suppressed by adding to the drive current a current that is of equal frequency and opposite phase to the pulsation. Vibration of the EPS motor shaft, and resultant vibration of the steering wheel and vehicle body, are thereby effectively suppressed.Type: ApplicationFiled: July 13, 2004Publication date: February 3, 2005Inventors: Mamoru Sawada, Toshiki Matsumoto, Tsutomu Tashiro, Mamoru Mabuchi, Takehito Fujii, Motoaki Kataoka
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Publication number: 20040262067Abstract: In a driving condition control system, a sensing unit senses a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly. A determining unit compares the first and second physical quantities of the rotations of the first and second rotational axle assemblies and determines whether a driving condition of the vehicle is unstable according to the compared result. As a result, the unstable condition of the vehicle can be rapidly detected without detecting a yaw moment of the vehicle.Type: ApplicationFiled: June 17, 2004Publication date: December 30, 2004Inventors: Mamoru Sawada, Toshiki Matsumoto, Tsutomu Tashiro, Mamoru Mabuchi, Takehito Fujii, Motoaki Kataoka
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Publication number: 20040259681Abstract: In a driving condition control system, a sensing unit is configured to sense a first physical quantity indicative of a rotation of the first rotatable axle assembly and a second physical quantity indicative of a rotation of the second rotatable axle assembly. A correcting unit is configured to correct the torque according to the sensed first and second physical quantities of the rotations of the first and second rotational axle assemblies. This allows the torque to be precisely obtained.Type: ApplicationFiled: June 17, 2004Publication date: December 23, 2004Inventors: Mamoru Sawada, Toshiki Matsumoto, Tsutomu Tashiro, Mamoru Mabuchi, Takehito Fujii, Motoaki Kataoka
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Patent number: 6810314Abstract: An integrated control system for a vehicle comprises a plurality of system device control units for controlling system devices in a vehicle, and a manager control unit for providing the system device control units with commands serving as operation directives of the system devices. A particular one of the system device control units has a hierarchical layer. If the predetermined operation should be carried out, the particular system device control unit issues a command to the particular system device as an independent operation directive for driving the particular system device to carry out the predetermined operation independently of an operation directive issued by the manager control unit.Type: GrantFiled: May 28, 2002Date of Patent: October 26, 2004Assignee: Denso CorporationInventors: Tsutomu Tashiro, Noboru Miyamoto, Takehito Fujii
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Patent number: 6704641Abstract: Automotive control system designed to control a plurality of controlled elements installed in the vehicle is provided. The control system includes control circuits and a manager circuit. The control circuits are designed to perform given control tasks using pre-defined controlled variables. The manager circuit is designed to determine a target value of a preselected output parameter of at least one of the controlled elements in the form of a second controlled variable different from one of the controlled variables employed in the control circuit for the one of the controlled elements. The control system also includes an adaptor designed to translate the second controlled variable indicative of the target value of the output parameter into a value of the corresponding controlled variable. This allows the control system to be constructed easily without redesigning typical controlled elements.Type: GrantFiled: October 2, 2001Date of Patent: March 9, 2004Assignee: Denso CorporationInventors: Tsutomu Tashiro, Noboru Miyamoto, Takehito Fujii, Motoaki Kataoka, Yoshifumi Kato
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Patent number: 6553297Abstract: In a vehicular control system, when in the engine ECU, ATECU or brake ECU there occurs important information which requires an urgent response by any of the other ECUs, the important information is transmitted directly to the corresponding ECU through an important information communication line L1 without going through a manager ECU 10. Therefore, a controller in the ECU receives the important information and immediately controls the corresponding component based on the important information.Type: GrantFiled: July 18, 2001Date of Patent: April 22, 2003Assignee: Denso CorporationInventors: Tsutomu Tashiro, Noboru Miyamoto, Takehito Fujii, Yoshifumi Kato, Toshiki Matsumoto, Tomohiro Kato
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Publication number: 20020183911Abstract: An integrated control system for a vehicle comprises a plurality of system device control units for controlling system devices in a vehicle, and a manager control unit for providing the system device control units with commands serving as operation directives of the system devices. A particular one of the system device control units has a hierarchical layer. If the predetermined operation should be carried out, the particular system device control unit issues a command to the particular system device as an independent operation directive for driving the particular system device to carry out the predetermined operation independently of an operation directive issued by the manager control unit.Type: ApplicationFiled: May 28, 2002Publication date: December 5, 2002Inventors: Tsutomu Tashiro, Noboru Miyamoto, Takehito Fujii
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Patent number: 6470252Abstract: An integrated vehicle control system for integratedly controlling a vehicle drive system transmits a control command from a manager ECU to an engine ECU and an AT ECU. The manager ECU receives characteristic information of an engine and an AT from the engine ECU and the AT ECU. The control commands are set on the basis of the characteristic information. Further, the engine ECU and the AT ECU are provided with a plurality of control rules corresponding to different tuning patterns. The manager ECU retrieves realizable tuning patterns from these ECUs, and selects the optimum tuning pattern corresponding to a use of a vehicle.Type: GrantFiled: June 12, 2001Date of Patent: October 22, 2002Assignee: Denso CorporationInventors: Tsutomu Tashiro, Takehito Fujii, Noboru Miyamoto, Yoshifumi Kato