Patents by Inventor Motohiko Honma
Motohiko Honma 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: 9132710Abstract: Disclosed is a damping force control device for a vehicle that controls the damping coefficient of a damping force generation device on the basis of a final target control amount that is based on the target control amount for attitude control, which suppresses changes in the vehicle body attitude in at least the rolling direction, and the target control amount for riding comfort control, which increases riding comfort with regards to vehicle body vibrations in at least the rolling direction. The target control amount for riding comfort control is a control amount calculated as the total of a fixed basic control amount and a variable control amount.Type: GrantFiled: April 9, 2014Date of Patent: September 15, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yanqing Liu, Yuichi Mizuta, Motohiko Honma, Jin Hozumi, Masaaki Tabata
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Patent number: 8914193Abstract: The magnitude of a linear damping coefficient Cs is set so as to decrease the greater a maximum amplitude value ? of an intermediate frequency sprung acceleration is. In the case where a damping force control apparatus carries out control for dampening vibrations of a sprung member using a nonlinear H-infinity control theory, the linear damping coefficient Cs is set to a high value when the maximum amplitude value ? of the intermediate frequency sprung acceleration inputted to a suspension apparatus is low. Accordingly, a requested damping force Freq also increases, which makes it possible to quickly dampen vibrations in the sprung member. Meanwhile, in the case where the maximum amplitude value ? of the intermediate frequency sprung acceleration is high, the linear damping coefficient Cs is set to a low value.Type: GrantFiled: February 23, 2009Date of Patent: December 16, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Atsushi Ogawa, Motohiko Honma, Koutaro Okimura, Taisuke Hayashi, Takahito Watanabe
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Publication number: 20140214274Abstract: Disclosed is a damping force control device for a vehicle that controls the damping coefficient of a damping force generation device on the basis of a final target control amount that is based on the target control amount for attitude control, which suppresses changes in the vehicle body attitude in at least the rolling direction, and the target control amount for riding comfort control, which increases riding comfort with regards to vehicle body vibrations in at least the rolling direction. The target control amount for riding comfort control is a control amount calculated as the total of a fixed basic control amount and a variable control amount.Type: ApplicationFiled: April 9, 2014Publication date: July 31, 2014Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yanqing LIU, Yuichi MIZUTA, Motohiko HONMA, Jin HOZUMI, Masaaki TABATA
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Patent number: 8744681Abstract: Disclosed is a damping force control device for a vehicle that controls the damping coefficient of a damping force generation device on the basis of a final target control amount that is based on the target control amount for attitude control, which suppresses changes in the vehicle body attitude in at least the rolling direction, and the target control amount for riding comfort control, which increases riding comfort with regards to vehicle body vibrations in at least the rolling direction. The target control amount for riding comfort control is a control amount calculated as the total of a fixed basic control amount and a variable control amount.Type: GrantFiled: February 17, 2010Date of Patent: June 3, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yanqing Liu, Yuichi Mizuta, Motohiko Honma, Jin Hozumi, Masaaki Tabata
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Patent number: 8641052Abstract: A suspension device (S) as a solution for the problem of the present invention includes: an active suspension unit (U) equipped with a linear actuator (A) and a first fluid pressure damper (D1) connected to the actuator (A) to extend and retract in the same direction; and a second fluid pressure damper (D2) arranged in parallel with the active suspension unit (U).Type: GrantFiled: October 27, 2009Date of Patent: February 4, 2014Assignees: Kayaba Industry Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Takuhiro Kondo, Yoshifumi Kobayashi, Motohiko Honma, Takayuki Tachi
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Patent number: 8598831Abstract: A vehicle damper including an electromagnetic damper configured to generate a damping force with respect to a motion of a sprung portion and an unsprung portion toward each other and a motion thereof away from each other and includes: an electromagnetic motor; a motion converting mechanism; and an external circuit which is disposed outside the electromagnetic motor and including a first connection passage and a second connection passage and which includes a battery-device connection circuit for connecting the motor and a battery device and a battery-device-connection-circuit-current adjuster configured to adjust an electric current that flows in the battery-device connection circuit, wherein the damper system further includes an external-circuit controller configured to control an electric current that flows in the electromagnetic motor by controlling the external circuit and configured to control a flow of an electric current between the battery device and the electromagnetic motor by controlling the batteryType: GrantFiled: July 8, 2009Date of Patent: December 3, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Atsushi Ogawa, Motohiko Honma, Hirofumi Inoue
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Patent number: 8469370Abstract: A suspension device (S) of the present invention includes: a member (11) coupled to one of a vehicle body and a vehicle axle; an outer cylinder (3) coupled to the other one of the vehicle body and the vehicle axle and disposed at the outer circumference of the member (11); and a bearing (4) that is interposed between the member (11) and the outer cylinder (3), the bearing (4) having balls (4a) that rollably contact at least one of the member (11) and the outer cylinder (3), and a ball case (4b) that retains the balls (4a) rollably.Type: GrantFiled: October 1, 2009Date of Patent: June 25, 2013Assignees: Kayaba Industry Co., Ltd, Toyota Jidosha Kabushiki KaishaInventors: Takuhiro Kondo, Mitsuhiko Hirose, Takayuki Tachi, Yasutaka Fukumoto, Motohiko Honma
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Publication number: 20120310479Abstract: Disclosed is a damping force control device for a vehicle that controls the damping coefficient of a damping force generation device on the basis of a final target control amount that is based on the target control amount for attitude control, which suppresses changes in the vehicle body attitude in at least the rolling direction, and the target control amount for riding comfort control, which increases riding comfort with regards to vehicle body vibrations in at least the rolling direction. The target control amount for riding comfort control is a control amount calculated as the total of a fixed basic control amount and a variable control amount.Type: ApplicationFiled: February 17, 2010Publication date: December 6, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yanqing Liu, Yuichi Mizuta, Motohiko Honma, Jin Hozumi, Masaaki Tabata
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Patent number: 8285449Abstract: A suspension ECU computes an actual roll angle and an actual pitch angle of a vehicle, and computes a difference between a target pitch angle and the actual pitch angle. The ECU then computes a total demanded damping force which must be cooperatively generated by shock absorbers so as to decrease the computed difference to zero, and distributes the total demanded damping force in proportion to the magnitude of a lateral acceleration such that a demanded damping force on the turn-locus inner side becomes greater than a demanded damping force on the turn-locus outer side. Further, the ECU determines whether or not the vehicle body is vibrating in the vertical direction as a result of input of a road surface disturbance, calculates a vibration-suppressing damping force needed for damping the vibration, and determines the demanded damping forces by use of the vibration-suppressing damping force.Type: GrantFiled: January 5, 2009Date of Patent: October 9, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Ikuhide Iyoda, Motohiko Honma
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Publication number: 20120187640Abstract: A suspension device (S) as a solution for the problem of the present invention includes: an active suspension unit (U) equipped with a linear actuator (A) and a first fluid pressure damper (D1) connected to the actuator (A) to extend and retract in the same direction; and a second fluid pressure damper (D2) arranged in parallel with the active suspension unit (U).Type: ApplicationFiled: October 27, 2009Publication date: July 26, 2012Inventors: Takuhiro Kondo, Yoshifumi Kobayashi, Motohiko Honma, Takayuki Tachi
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Publication number: 20120181767Abstract: A suspension device (S) of the present invention includes: a member (11) coupled to one of a vehicle body and a vehicle axle; an outer cylinder (3) coupled to the other one of the vehicle body and the vehicle axle and disposed at the outer circumference of the member (11); and a bearing (4) that is interposed between the member (11) and the outer cylinder (3), the bearing (4) having balls (4a) that rollably contact at least one of the member (11) and the outer cylinder (3), and a ball case (4b) that retains the balls (4a) rollably.Type: ApplicationFiled: October 1, 2009Publication date: July 19, 2012Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, KAYABA INDUSTRY CO., LTD.Inventors: Takuhiro Kondo, Mitsuhiko Hirose, Takayuki Tachi, Yasutaka Fukumoto, Motohiko Honma
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Publication number: 20120046829Abstract: The magnitude of a linear damping coefficient Cs is set so as to decrease the greater a maximum amplitude value ? of an intermediate frequency sprung acceleration is. In the case where a damping force control apparatus carries out control for dampening vibrations of a sprung member using a nonlinear H-infinity control theory, the linear damping coefficient Cs is set to a high value when the maximum amplitude value ? of the intermediate frequency sprung acceleration inputted to a suspension apparatus is low. Accordingly, a requested damping force Freq also increases, which makes it possible to quickly dampen vibrations in the sprung member. Meanwhile, in the case where the maximum amplitude value ? of the intermediate frequency sprung acceleration is high, the linear damping coefficient Cs is set to a low value.Type: ApplicationFiled: February 23, 2009Publication date: February 23, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Atsushi Ogawa, Motohiko Honma, Koutaro Okimura, Taisuke Hayashi, Takahito Watanabe
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Publication number: 20120042217Abstract: A corrected state space model obtained by correcting a state space model to represent a controllable system by adding an error matrix ? to a state space model representing an uncontrollable system is designed. A control object is controlled based on a control input of the system represented by this corrected state space model. The control input is calculated by a state feedback controller. By correcting the state space model representing the uncontrollable system by the error matrix ?, the system can be made controllable. Since the error matrix ? is added to a state matrix, an influence of an error on an output of the system can be reduced.Type: ApplicationFiled: February 18, 2009Publication date: February 16, 2012Applicant: Toyota Jidosha Kabushiki KaishaInventors: Takahito Watanabe, Motohiko Honma, Masaaki Tabata
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Publication number: 20110298399Abstract: A vehicle damper including an electromagnetic damper configured to generate a damping force with respect to a motion of a sprung portion and an unsprung portion toward each other and a motion thereof away from each other and includes: an electromagnetic motor; a motion converting mechanism; and an external circuit which is disposed outside the electromagnetic motor and including a first connection passage and a second connection passage and which includes a battery-device connection circuit for connecting the motor and a battery device and a battery-device-connection-circuit-current adjuster configured to adjust an electric current that flows in the battery-device connection circuit, wherein the damper system further includes an external-circuit controller configured to control an electric current that flows in the electromagnetic motor by controlling the external circuit and configured to control a flow of an electric current between the battery device and the electromagnetic motor by controlling the batteryType: ApplicationFiled: July 8, 2009Publication date: December 8, 2011Applicant: Toyota Jidosha Kabushiki KaishaInventors: Atsushi Ogawa, Motohiko Honma, Hirofumi Inoue
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Patent number: 8036791Abstract: A suspension ECU 13 calculates a target characteristic changing coefficient a_new for changing a target characteristic, which is represented by a quadratic function, by use of the maximum actual roll angle ?_max generated in a vehicle body during the current turning state and a turning pitch angle ?_fy_max which is a fraction of an actual pitch angle ? generated as a result of turning, and changes the target characteristic by use of the coefficient a_new. Subsequently, the suspension ECU 13 calculates the difference ?? between the actual pitch angle ? and a target pitch angle ?h corresponding to the actual roll angle ? on the basis of the changed target characteristic, and calculates a total demanded damping force F to be cooperatively generated by the shock absorbers so as to reduce the difference ?? to zero.Type: GrantFiled: February 10, 2009Date of Patent: October 11, 2011Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki KaishaInventors: Yuichi Mizuta, Motohiko Honma, Wataru Tanaka
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Publication number: 20110029198Abstract: A suspension ECU 13 calculates a target characteristic changing coefficient a_new for changing a target characteristic, which is represented by a quadratic function, by use of the maximum actual roll angle ?_max generated in a vehicle body during the current turning state and a turning pitch angle ?_fy_max which is a fraction of an actual pitch angle ? generated as a result of turning, and changes the target characteristic by use of the coefficient a_new. Subsequently, the suspension ECU 13 calculates the difference ?? between the actual pitch angle ? and a target pitch angle ?h corresponding to the actual roll angle ? on the basis of the changed target characteristic, and calculates a total demanded damping force F to be cooperatively generated by the shock absorbers so as to reduce the difference ?? to zero.Type: ApplicationFiled: February 10, 2009Publication date: February 3, 2011Applicant: Toyota Jidosha Kabushiki KaishaInventors: Yuichi Mizuta, Motohiko Honma, Wataru Tanaka
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Publication number: 20100191420Abstract: A damping force control apparatus for a vehicle computes an actual roll angle ? and an actual pitch angle ? in step S11, and computes a difference ?? between a target pitch angle ?a and the actual pitch angle ? in step S12. In step 13, the apparatus computes a total demanded damping force F which must be cooperatively generated by shock absorbers so as to decrease the computed ?? to zero. In step S14, the apparatus distributes the total demanded damping force F in proportion to the magnitude of a lateral acceleration G such that a demanded damping force Fi on the turn-locus inner side becomes greater than a demanded damping force Fo on the turn-locus outer side. In step S15, the apparatus controls the damping force of each of the shock absorbers to the damping force Fi or the damping force Fo. Thus, throughout a turn, a posture changing behavior in which the turn-locus inner side serves as a fulcrum can be maintained.Type: ApplicationFiled: September 19, 2008Publication date: July 29, 2010Inventors: Motohiko Honma, Yuichi Mizuta, Taisuke Hayashi, Wataru Tanaka
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Publication number: 20100076649Abstract: A suspension ECU 13 computes an actual roll angle ? and an actual pitch angle ? of a vehicle, and computes a difference ?? between a target pitch angle ?a and the actual pitch angle ?. The ECU then computes a total demanded damping force F which must be cooperatively generated by shock absorbers 11a, 11b, 11c, and 11d so as to decrease the computed ?? to zero, and distributes the total demanded damping force F in proportion to the magnitude of a lateral acceleration Gl such that a demanded damping force Fi on the turn-locus inner side becomes greater than a demanded damping force Fo on the turn-locus outer side. Further, the ECU 13 determines whether or not the vehicle body is vibrating in the vertical direction as a result of input of a road surface disturbance, calculates a vibration-suppressing damping force Fd needed for damping the vibration, and determines the demanded damping forces Fi and Fo by use of the vibration-suppressing damping force Fd.Type: ApplicationFiled: January 5, 2009Publication date: March 25, 2010Applicant: Toyota Jidosha Kabushiki KaishaInventors: Ikuhide Iyoda, Motohiko Honma
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Patent number: 7546911Abstract: A suspension apparatus for use in a vehicle including a first liquid passage; a first connection portion; a first accumulator which is connected to the hydraulic suspension device via the first connection portion and the first liquid passage; a second liquid passage; a second connection portion; a second accumulator which is connected to the first liquid passage via the second connection portion and the second liquid passage; and a liquid-flow control device which controls a flow of a hydraulic liquid between the hydraulic suspension device and at least one of the first and second accumulators, wherein the first liquid passage and the first connection portion allow the hydraulic liquid to more easily flow therethrough into the first accumulator than the second liquid passage and the second connection portion allow the hydraulic liquid to flow therethrough into the second accumulator.Type: GrantFiled: August 26, 2005Date of Patent: June 16, 2009Assignee: Toyota Jidosha Kabushiki KaishaInventor: Motohiko Honma
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Patent number: 7360777Abstract: A vehicle suspension system for a vehicle, including: (a) a plurality of suspension cylinders each disposed between a chassis-side member and a corresponding one of a plurality of wheel-side members; (b) a controller cylinder including a housing and at least one piston slidably mounted in the housing, such that the housing and the at least one piston cooperate to define a plurality of chambers each having a volume that is variable upon slide movement of the at least one piston relative to the housing; (c) individual conduits each communicating a corresponding one of the plurality of chambers of the controller cylinder and a chamber of a corresponding one of the plurality of suspension cylinders; and (d) a suspension-cylinder operation facilitator operable to facilitate an operation of each of the plurality of suspension cylinders for permitting displacement of each of the plurality of wheel-side members relative to the chassis-side member after the at least one piston of the controller cylinder has reached itType: GrantFiled: November 18, 2005Date of Patent: April 22, 2008Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kazuyuki Mizuno, Masaki Kanatani, Hidenori Kajino, Motohiko Honma