Patents by Inventor Mamoru Sawada
Mamoru Sawada 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: 7997363Abstract: 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: GrantFiled: September 9, 2008Date of Patent: August 16, 2011Assignee: Denso CorporationInventors: Katsuyuki Mori, Mamoru Sawada, Toshiki Matsumoto, Takehito Fujii
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Patent number: 7970516Abstract: A vehicle control system estimates the vibration states of tires by using a vehicle vibration model that is separated into a vehicle body vibration model, a chassis vibration model, and a tire vibration model with high precision. The tire vibration model in the vehicle vibration model is formed of a rear wheel tire vibration model, a front wheel tire vibration model, and a virtual coupling element vibration model that virtually couples the rear wheel tire vibration model and the front wheel tire vibration model. Influence of the vibration state that is conducted between the front wheel tires and the rear wheel tires is considered while the tire vibration model and the chassis vibration model are separated from each other, thereby making it possible to estimate the vibrations that occur in the front wheel tires and the rear wheel tires.Type: GrantFiled: April 2, 2008Date of Patent: June 28, 2011Assignee: Denso CorporationInventors: Toshiki Matsumoto, Mamoru Sawada
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Publication number: 20110093198Abstract: 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: December 20, 2010Publication date: April 21, 2011Applicant: DENSO CORPORATIONInventors: Minoru Okada, Mamoru Sawada, Takehito Fujii, Hiromichi Tanaka
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Patent number: 7885765Abstract: 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: GrantFiled: July 26, 2007Date of Patent: February 8, 2011Assignee: Denso CorporationInventors: Minoru Okada, Mamoru Sawada, Takehito Fujii, Hiromichi Tanaka
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Patent number: 7783402Abstract: 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: GrantFiled: August 11, 2005Date of Patent: August 24, 2010Assignee: Denso CorporationInventors: Mamoru Sawada, Toshiki Matsumoto, Takehito Fujiii, Tsutomu Tashiro
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Publication number: 20100036563Abstract: A travel support apparatus sets a travel locus of a vehicle based on a gaze point of a driver of the vehicle. By utilizing the gaze point, the travel locus is calculated and set for the travel control of the vehicle, especially for a curved portion of a road, in a matching manner that the calculated travel locus approximates the travel locus created by the steering operation of the driver. The above locus calculation scheme generates a natural travel locus because the driver of the vehicle usually gazes at an exit of the curved portion of the road when he/she steers the vehicle on the road. The natural travel locus calculated and set by the travel support apparatus prevents the driver from having discomfort and/or unsafe feeling while the travel of the vehicle is controlled by the apparatus.Type: ApplicationFiled: August 4, 2009Publication date: February 11, 2010Applicant: DENSO CORPORATIONInventors: Hiroshi Inou, Mamoru Sawada
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Patent number: 7630796Abstract: A system and method are disclosed for providing a display relating to at least one aspect of vehicle body action. The system includes at least one sensor, to sense information of a vehicle. Further, an estimating part is included to determine at least one aspect of vehicle body action based upon the sensed information. Finally, a display is located within the vehicle, to provide a visual display relating to at least one aspect of the determined vehicle body action.Type: GrantFiled: November 15, 2005Date of Patent: December 8, 2009Assignee: Denso CorporationInventors: Minoru Okada, Kazuyoshi Kato, Masashi Kato, Toshiki Matsumoto, Mamoru Sawada
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Patent number: 7599763Abstract: A vehicle stability control system includes a base required driving force calculation unit, an estimated driving force estimation unit, and a required driving force correction unit. The base required driving force calculation unit calculates a physical quantity to generate the base required driving force at a driving wheel. The estimated driving force estimation unit estimates a driving force as being generated in the vehicle. The required driving force correction unit obtains a correction to suppress a potential pitching vibration in the vehicle. The physical quantity calculated by the base required driving force calculation unit is corrected on the basis of the correction. The corrected required driving force obtained by the required driving force correction unit is generated at the driving wheel.Type: GrantFiled: August 30, 2005Date of Patent: October 6, 2009Assignee: Denso CorporationInventors: Toshiki Matsumoto, Mamoru Sawada
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Patent number: 7580820Abstract: A control information conveyance structure comprises: a cognition-system control platform which recognizes the circumstances of the surroundings of a vehicle and generates a control space; an operation-system control platform which recognizes the circumstances related to the movement of the vehicle body and generates a control space; and a determination-system control platform which generates a determination control space based on information from the cognition-system and operation-system control platforms. The conveyance structure is constituted so that sensors and individual control devices belong to either or both of the control platforms. This control information conveyance structure is adopted. Thus, control platforms of such a control structure that the individual control devices are managed at a higher level can be provided.Type: GrantFiled: June 19, 2003Date of Patent: August 25, 2009Assignee: Denso CorporationInventor: Mamoru Sawada
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Patent number: 7577504Abstract: A vehicle stability control system includes a basic request driving force computing unit, a front and rear wheel load computing unit, a virtual turning radius estimating unit, a target value computing unit, and a vibration damping correction controlling unit. The basic request driving force computing unit computes a physical quantity so as to generate the basic request driving force requested by a driver. The front and rear wheel load computing unit detect a load applied to the wheels. The virtual turning radius estimating unit estimates a virtual turning radius. The target value computing unit computes a target value of a stability factor. The vibration damping correction controlling unit corrects the physical quantity so as to follow the target value. The system generates the driving force for the driving wheel.Type: GrantFiled: March 9, 2005Date of Patent: August 18, 2009Assignee: Denso CorporationInventors: Mamoru Sawada, Toshiki Matsumoto
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Publication number: 20090157246Abstract: A vehicle motion control device adjusts vibrations occurring in components of a vehicle so as to control the motion of a vehicle having independent drive assemblies for front wheels and for rear wheels. The vehicle motion control device includes a base request torque calculation unit that calculates first and second base request torques in response to a request made by the driver of a vehicle. A correction torque calculation unit calculates first and second correction torques used to adjust vibrations in a low-frequency band and in a high-frequency band of the vibrations of the components of the vehicle. An internal combustion engine control unit and a motor generator control unit control an internal combustion engine and a motor generator so that the first and second base request torques are corrected with the first and second correction torques.Type: ApplicationFiled: December 11, 2008Publication date: June 18, 2009Applicant: DENSO CORPORATIONInventors: Katsuyuki Mori, Mamoru Sawada, Toshiki Matsumoto, Takeshi Sada
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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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Patent number: 7477760Abstract: An on-vehicle camera captures an image of an outside visual scene that is outside of a vehicle and outputs image data of the captured image. A wheel speed sensor outputs a measurement signal, which corresponds to a moving speed of the vehicle. An ECU determines a state of the vehicle based on the measurement signal of the wheel speed sensor and an optical flow of a predetermined point of the captured image, which is captured during traveling of the vehicle. The optical flow of the predetermined point is obtained based on the image data of the captured image.Type: GrantFiled: March 8, 2005Date of Patent: January 13, 2009Assignee: Denso CorporationInventors: Mamoru Sawada, Toshiki Matsumoto
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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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Publication number: 20080249689Abstract: A vehicle control system estimates the vibration states of tires by using a vehicle vibration model that is separated into a vehicle body vibration model, a chassis vibration model, and a tire vibration model with high precision. The tire vibration model in the vehicle vibration model is formed of a rear wheel tire vibration model, a front wheel tire vibration model, and a virtual coupling element vibration model that virtually couples the rear wheel tire vibration model and the front wheel tire vibration model. Influence of the vibration state that is conducted between the front wheel tires and the rear wheel tires is considered while the tire vibration model and the chassis vibration model are separated from each other, thereby making it possible to estimate the vibrations that occur in the front wheel tires and the rear wheel tires.Type: ApplicationFiled: April 2, 2008Publication date: October 9, 2008Applicant: DENSO CORPORATIONInventors: Toshiki Matsumoto, Mamoru Sawada
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Publication number: 20080235570Abstract: A spatial bulletin board input device converts a movement of drawing a memo content in an actual space to three-dimensional coordinate information and acquires positional information which specifies a place in which the memo is written and saves the information in a spatial communication server. In the image-pickup place in the actual space, the picked-up image in the actual space is displayed on a spatial bulletin board display device and a browsing request is sent to the spatial communication server. The spatial bulletin board display device acquires the three-dimensional coordinate information and the memo positional information of the memo content near the image-taking place from the spatial communication server and displays the memo content on the picked-up image.Type: ApplicationFiled: September 14, 2007Publication date: September 25, 2008Applicant: NTT DoCoMo, Inc.Inventors: Mamoru Sawada, Takuro Komine, Eiichi Hakkaku
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Publication number: 20080066991Abstract: A controller controls an on-vehicle device having an operating member operated by a driver to receive a driver's operating force and an assisting mechanism giving an assisting force to the operating member. This mechanism is powered by an on-vehicle battery. The controller detects forces applied to the device and calculates a control amount giving the assisting force to the device based on results detected by the force detector. The control amount is calculated every type of the applied forces whose frequency bands are at least partly different from each other. The controller drives the assisting mechanism based on the control amount and detects an operating state of the battery. The controller adjusts the control amount such that, as the calculated battery state decreases in a powering function of the battery, the control amount for, of the applied forces, a specified force having specified frequency components is monotonously reduced.Type: ApplicationFiled: September 13, 2007Publication date: March 20, 2008Applicant: DENSO CorporationInventors: Motoaki Kataoka, Mamoru Sawada
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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