Patents by Inventor Jin Hozumi
Jin Hozumi 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: 9592714Abstract: A vehicle control device includes a spring mechanism configured to connect a sprung member and an unsprung member of a vehicle, generate a spring force according to a relative displacement between the sprung member and the unsprung member, and be able to variably control the spring force, and a damping mechanism configured to connect the sprung member and the unsprung member, generate a damping force for damping a relative motion between the sprung member and the unsprung member, and be able to variably control the damping force, wherein the spring mechanism and the damping mechanism are controlled based on a first physical quantity relating to a sprung vibration of the vehicle and a second physical quantity relating to an unsprung vibration of the vehicle.Type: GrantFiled: September 3, 2010Date of Patent: March 14, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yanqing Liu, Jin Hozumi, Masaaki Tabata
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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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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: 8560171Abstract: The damping force of a damping force generation apparatus is controlled by operating an actuator on the basis of a control input u calculated by a state feedback controller K designed such that an L2 gain of a closed loop control system S which includes a generalized plant G designed by making use of a delay-approximated model M and the state feedback controller K therefor becomes less than a previously set positive constant ?. The delay-approximated model M is designed such that a delay element R representing operation delay of the actuator and a delay compensation element R* cancelling out the delay act on a mechanical motion model of the damping force generation apparatus. The delay-approximated model M is a bilinear system, and is designed to approximate a delay-considered model which is a control model designed on the basis of the mechanical motion model of the damping force generation apparatus and in consideration of the delay.Type: GrantFiled: December 25, 2008Date of Patent: October 15, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventor: Jin Hozumi
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Publication number: 20130166149Abstract: A vehicle control device includes a spring mechanism configured to connect a sprung member and an unsprung member of a vehicle, generate a spring force according to a relative displacement between the sprung member and the unsprung member, and be able to variably control the spring force, and a damping mechanism configured to connect the sprung member and the unsprung member, generate a damping force for damping a relative motion between the sprung member and the unsprung member, and be able to variably control the damping force, wherein the spring mechanism and the damping mechanism are controlled based on a first physical quantity relating to a sprung vibration of the vehicle and a second physical quantity relating to an unsprung vibration of the vehicle.Type: ApplicationFiled: September 3, 2010Publication date: June 27, 2013Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yanqing Liu, Jin Hozumi, Masaaki Tabata
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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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Publication number: 20120004806Abstract: The damping force of a damping force generation apparatus is controlled by operating an actuator on the basis of a control input u calculated by a state feedback controller K designed such that an L2 gain of a closed loop control system S which includes a generalized plant G designed by making use of a delay-approximated model M and the state feedback controller K therefor becomes less than a previously set positive constant ?. The delay-approximated model M is designed such that a delay element R representing operation delay of the actuator and a delay compensation element R* cancelling out the delay act on a mechanical motion model of the damping force generation apparatus. The delay-approximated model M is a bilinear system, and is designed to approximate a delay-considered model which is a control model designed on the basis of the mechanical motion model of the damping force generation apparatus and in consideration of the delay.Type: ApplicationFiled: December 25, 2008Publication date: January 5, 2012Inventor: Jin Hozumi
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Patent number: 7949446Abstract: A body-roll restraining system with high utility equipped with active stabilizer devices on a front-wheel side and a rear-wheel side of the vehicle and configured to generate roll restraining forces whose directions are opposite to each other, and maybe configured such that the roll restraining forces are changeable owing to an operation of an actuator, The system having a road-surface-unevenness-dependent-roll restraining control. The above-indicated road-surface-unevenness-dependent-roll restraining control is executable in addition to a control which was conducted in conventional stabilizer devices to restrain the roll that arises from turning of the vehicle, and thus the ride comfort of the vehicle is enhanced.Type: GrantFiled: September 22, 2008Date of Patent: May 24, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Shingo Koumura, Jin Hozumi
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Publication number: 20100324780Abstract: A body-roll restraining system with high utility equipped with active stabilizer devices on a front-wheel side and a rear-wheel side of the vehicle and configured to generate roll restraining forces whose directions are opposite to each other, and maybe configured such that the roll restraining forces are changeable owing to an operation of an actuator, The system having a road-surface-unevenness-dependent-roll restraining control. The above-indicated road-surface-unevenness-dependent-roll restraining control is executable in addition to a control which was conducted in conventional stabilizer devices to restrain the roll that arises from turning of the vehicle, and thus the ride comfort of the vehicle is enhanced.Type: ApplicationFiled: September 22, 2008Publication date: December 23, 2010Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Shingo Koumura, Jin Hozumi