Patents by Inventor Daisuke Umetsu
Daisuke Umetsu 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: 20180345976Abstract: A control device for a vehicle includes: an engine (10); an engine torque adjustment mechanism for adjusting an output torque of the engine; and a PCM (50) configured, upon satisfaction of a vehicle attitude control executing condition that the vehicle is traveling and a steering angle-related value is increasing, to control the engine torque adjustment mechanism to reduce the engine torque to thereby generate deceleration of the vehicle so as to control vehicle attitude. The PCM (50) is further configured to set a rate of change in the engine output torque being reduced, such that the rate of change becomes larger as the number of times of combustion per unit time in the engine (10) becomes smaller, and to control the engine torque adjustment mechanism to reduce the engine output torque according to the rate of change set by the torque reduction change rate-setting part.Type: ApplicationFiled: September 9, 2016Publication date: December 6, 2018Applicant: MAZDA MOTOR CORPORATIONInventors: Keiichi HIWATASHI, Daisuke UMETSU, Osamu SUNAHARA, Koichi KIMOTO, Yasunori TAKAHARA, Daisaku OGAWA, Chikako OHISA
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Publication number: 20180345977Abstract: A control device for a vehicle includes: an engine (10); an engine torque adjustment mechanism; and a PCM (50) configured, upon satisfaction of a condition that the vehicle is traveling and a steering angle-related value is increasing, to control the engine torque adjustment mechanism to reduce the engine torque to thereby execute a vehicle attitude control for generating deceleration of the vehicle, and, upon satisfaction of a given terminating condition for terminating the vehicle attitude control, to restore the reduced engine output torque to an original state before the execution of the vehicle attitude control. The PCM (50) sets a time period from the satisfaction of the terminating condition through until start of restoration of the engine torque, such that it becomes longer as the number of times of combustion per unit time becomes larger, and starts to restore the engine torque when the set time period has elapsed.Type: ApplicationFiled: September 9, 2016Publication date: December 6, 2018Applicant: MAZDA MOTOR CORPORATIONInventors: Keiichi HIWATASHI, Daisuke UMETSU, Osamu SUNAHARA, Koichi KIMOTO, Yasunori TAKAHARA, Daisaku OGAWA, Chikako OHISA
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Publication number: 20180345975Abstract: A control device for a vehicle includes: an engine (10); an engine torque adjustment mechanism; and a PCM (50) configured to execute vehicle attitude control for, upon satisfaction of a vehicle attitude control executing condition that the vehicle is traveling and a steering angle-related value is increasing, reducing the engine torque to thereby generate deceleration of the vehicle. The PCM (50) is configured, upon satisfaction of a given terminating condition for terminating the vehicle attitude control, to control the engine torque adjustment mechanism to restore the reduced engine torque to an original state before the execution of the vehicle attitude control. The PCM (50) sets a rate of change in the engine output torque being restored, such that it becomes larger as the number of times of combustion per unit time becomes smaller, and restores the engine torque according to the rate of change set in the above manner.Type: ApplicationFiled: September 9, 2016Publication date: December 6, 2018Applicant: MAZDA MOTOR CORPORATIONInventors: Keiichi HIWATASHI, Chikako OHISA, Daisuke UMETSU, Osamu SUNAHARA, Koichi KIMOTO, Yasunori TAKAHARA, Daisaku OGAWA
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Patent number: 10138824Abstract: The turbocharged engine control device comprises a basic target torque-deciding part for deciding a basic target torque based on a driving state of a vehicle including an accelerator pedal operation state; a torque reduction amount-deciding part for deciding a torque reduction amount based on a driving state of the vehicle other than the accelerator pedal operation state; a final target torque-deciding part for deciding a final target torque based on the decided basic target torque and the decided torque reduction amount; and an engine output control part for controlling an intake air amount so as to realize a target air amount required for an engine to output the decided final target torque, wherein the engine output control part is operable, when an operating state of the engine falls within a supercharging region, to restrict a reduction in the intake air amount corresponding to a change in the torque reduction amount.Type: GrantFiled: February 10, 2017Date of Patent: November 27, 2018Assignee: MAZDA MOTOR CORPORATIONInventors: Chikako Ohisa, Osamu Sunahara, Daisuke Umetsu, Taizo Ohmae, Yugou Sunagare, Yasunori Takahara, Daisaku Ogawa, Takahiro Kawamura, Takeatsu Ito
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Patent number: 10125670Abstract: The turbocharged engine control device comprises a basic target torque-deciding part for deciding a basic target torque based on a driving state of a vehicle including an accelerator pedal operation state; a torque reduction amount-deciding part for deciding a torque reduction amount based on a driving state of the vehicle other than the accelerator pedal operation state; a final target torque-deciding part for deciding a final target torque based on the decided basic target torque and the decided torque reduction amount; and an engine output control part for controlling the engine so as to cause the engine to output the decided final target torque, wherein the engine output control part is operable, when an operating state of the engine falls within a supercharging region where supercharging by a compressor, to restrict control of the engine corresponding to a change in the torque reduction amount.Type: GrantFiled: February 10, 2017Date of Patent: November 13, 2018Assignee: MAZDA MOTOR CORPORATIONInventors: Chikako Ohisa, Osamu Sunahara, Daisuke Umetsu, Taizo Ohmae, Yugou Sunagare, Yasunori Takahara, Daisaku Ogawa, Takahiro Kawamura, Takeatsu Ito
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Publication number: 20180281780Abstract: Disclosed is a vehicle control device which is applied to a vehicle equipped with an engine (10) and an engine torque adjustment mechanism for adjusting an engine torque. The control device comprises a PCM (50) configured, upon satisfaction of a condition that the vehicle is traveling and a steering angle-related value relevant to a steering angle of a steering device is increasing, to control the engine torque adjustment mechanism to reduce the engine torque, so as to execute a vehicle attitude control for generating vehicle deceleration. The PCM (50) is configured, upon satisfaction of a vehicle attitude control-terminating condition for terminating the vehicle attitude control, to control the engine torque adjustment mechanism to restore the engine torque to an original level of torque before the execution of the vehicle attitude control.Type: ApplicationFiled: December 22, 2016Publication date: October 4, 2018Applicant: MAZDA MOTOR CORPORATIONInventors: Keiichi HIWATASHI, Daisuke UMETSU, Osamu SUNAHARA, Koichi KIMOTO, Yasunori TAKAHARA, Daisaku OGAWA, Chikako OHISA
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Publication number: 20180274459Abstract: Disclosed is a vehicle control device which is applied to a vehicle equipped with an engine (10) and an engine torque adjustment mechanism for adjusting an output torque (engine torque) of the engine (10). The vehicle control device comprises a PCM (50) configured, upon satisfaction of a condition that the vehicle is traveling and a steering angle-related value relevant to a steering angle of a steering device is increasing, to control the engine torque adjustment mechanism to reduce the engine torque so as to generate vehicle deceleration to control vehicle attitude. The PCM (50) is further configured to gradually ease the condition, as the number of times of combustion per unit time in the engine (10) becomes smaller.Type: ApplicationFiled: December 22, 2016Publication date: September 27, 2018Applicant: MAZDA MOTOR CORPORATIONInventors: Keiichi HIWATASHI, Yasunori TAKAHARA, Daisaku OGAWA, Daisuke UMETSU, Osamu SUNAHARA, Chikako OHISA, Koichi KIMOTO
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Publication number: 20180273024Abstract: Provided is a vehicle behavior control device capable of performing a vehicle behavior control to accurately realize vehicle behavior intended by a driver, without causing the driver to feel uncomfortable in vehicle behavior during straight-ahead traveling. The vehicle behavior control device comprises a PCM (18) configured to control the vehicle (1) to reduce torque for driving the vehicle, according to a steering speed of the vehicle. The PCM is configured, under the condition that the steering speed is greater than a predetermined threshold Ts, and when a steering angle of the vehicle is increasing, and the steering speed is increasing, to control to gradually increase an amount of reduction of the torque for driving the vehicle, along with an increase in the steering speed, and, under the condition that the steering speed is equal to or less than the threshold Ts, to control to stop the reduction of the torque.Type: ApplicationFiled: November 2, 2016Publication date: September 27, 2018Applicant: MAZDA MOTOR CORPORATIONInventors: Daisuke UMETSU, Osamu SUNAHARA
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Patent number: 10082124Abstract: A vehicle control device is provided, which includes an engine including an ignition plug oriented inside a combustion chamber, a component provided in or near an exhaust passage of the engine, a processor configured to execute a vehicle attitude controlling module for controlling an attitude of a vehicle by retarding an ignition timing of the ignition plug to reduce an engine torque so as to decelerate the vehicle, when a condition is satisfied, the condition being that the vehicle is traveling and a steering angle related value that is related to a steering angle of a steering device increases, and a torque reduction restricting module for restricting a reduction amount of the engine torque as at least one of an engine load and an engine speed increases during the vehicle attitude control.Type: GrantFiled: September 6, 2017Date of Patent: September 25, 2018Assignee: Mazda Motor CorporationInventors: Keiichi Hiwatashi, Yasunori Takahara, Daisaku Ogawa, Daisuke Umetsu, Chikako Ohisa, Koichi Kimoto
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Publication number: 20180266345Abstract: A vehicle control device is provided, which includes an engine, an engine control mechanism configured to control torque generated by the engine, a steering device, and a processor. The processor determines whether a vehicle is traveling and a steering angle related value that is related to a steering angle of the steering device increases, executes a control of the engine control mechanism to reduce the torque when the vehicle is determined to be traveling and the steering angle related value is determined to increase, determines whether a combustion frequency of the engine per unit time is lower than a given value, executes the control for reducing the torque when the combustion frequency is determined to be higher than the given value, and prevents the execution of the control for reducing the torque when the combustion frequency is determined to be lower than the given value.Type: ApplicationFiled: February 21, 2018Publication date: September 20, 2018Inventors: Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Yasunori Takahara, Yuichiro Akiya, Chikako Ohisa, Atsushi Yamasaki, Keiichi Hiwatashi
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Publication number: 20180265119Abstract: A vehicle control device is provided, which includes a drive source configured to generate torque as driving force of a vehicle, a transmission torque control mechanism configured to control transmission torque to drive wheels according to the generated torque, and a processor configured to execute a vehicle attitude controlling module to perform a vehicle attitude control by controlling the transmission torque control mechanism to reduce the transmission torque so as to decelerate the vehicle when a starting condition that the vehicle is traveling and a steering angle related value increases is satisfied, and then, when a given terminating condition is satisfied, controlling the mechanism to resume the transmission torque back to the torque before being reduced. The transmission torque is controlled so as to cause a yaw rate that occurs in the vehicle while the vehicle attitude control is performed, to be lower than an upper limit yaw rate.Type: ApplicationFiled: February 20, 2018Publication date: September 20, 2018Inventors: Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Yasunori Takahara, Yuichiro Akiya, Chikako Ohisa, Atsushi Yamasaki, Keiichi Hiwatashi
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Publication number: 20180265118Abstract: A vehicle control device is provided, which includes an engine, an engine control mechanism configured to control torque generated by the engine, a processor configured to execute a vehicle attitude controlling module to control attitude of a vehicle by controlling the engine control mechanism to reduce the torque so as to decelerate the vehicle, when a condition that the vehicle is traveling and a steering angle related value that is related to a steering angle of a steering device increases is satisfied, and a torque reduction amount setting module to set the reduction amount of the torque to be larger as a combustion frequency of the engine per unit time decreases. The vehicle attitude controlling module controls the engine control mechanism to reduce the torque based on the set reduction amount.Type: ApplicationFiled: February 20, 2018Publication date: September 20, 2018Inventors: Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Yasunori Takahara, Yuichiro Akiya, Chikako Ohisa, Atsushi Yamasaki, Keiichi Hiwatashi
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Publication number: 20180266346Abstract: A vehicle control device is provided, which includes an engine, an engine control mechanism configured to control torque generated by the engine, and a processor configured to execute a vehicle attitude controlling module to perform a vehicle attitude control in which the engine control mechanism is controlled to reduce the torque so as to decelerate the vehicle, when a condition that the vehicle is traveling and a steering angle related value that is related to a steering angle of a steering device increases is satisfied, and a preventing module to prevent a combustion frequency of the engine per unit time from falling below a given value while the vehicle attitude controlling module executes the vehicle attitude control.Type: ApplicationFiled: February 21, 2018Publication date: September 20, 2018Inventors: Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Yasunori Takahara, Yuichiro Akiya, Chikako Ohisa, Atsushi Yamasaki, Keiichi Hiwatashi
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Patent number: 10024257Abstract: A PCM comprises a basic target torque-deciding part for deciding a basic target torque, based on a driving state of a vehicle including an accelerator pedal operation state, a torque reduction amount-deciding part for deciding a torque reduction amount, based on a driving state of the vehicle other than the accelerator pedal operation state, a final target torque-deciding part for deciding a final target torque, based on the decided basic target torque and the decided torque reduction amount, and an engine output control part for controlling an engine to cause the engine to output the decided final target torque, wherein the engine output control part is operable to prohibit switching of an operation mode of the engine from being performed simultaneously with control of the engine according to a change in the final target torque corresponding to a change in the torque reduction amount.Type: GrantFiled: March 1, 2017Date of Patent: July 17, 2018Assignee: MAZDA MOTOR CORPORATIONInventors: Chikako Ohisa, Osamu Sunahara, Daisuke Umetsu, Takuo Hirano, Kunihiro Shishima, Takahiro Kawamura, Yasunori Takahara, Daisaku Ogawa, Takeatsu Ito
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Publication number: 20180086349Abstract: The vehicle control device is designed to control a vehicle equipped with an engine (10), and an automatic transmission (200) comprising a torque converter (202) with a lockup clutch (202f). The vehicle control device comprises a controller (50) configured to perform control of changing an engagement degree of the lockup clutch (202f) and to, when such a condition that the vehicle is traveling and a steering angle-related value as a parameter related to a steering angle of a steering apparatus of the vehicle increases is satisfied, reduce an output toque of the engine (10) to generate a deceleration of the vehicle to thereby execute a torque reduction control for controlling an attitude of the vehicle. The controller (50) is configured to reduce the output toque of the engine (10), in accordance with the engagement degree of the lockup clutch (202f) controlled by a lockup control.Type: ApplicationFiled: September 22, 2017Publication date: March 29, 2018Applicant: MAZDA MOTOR CORPORATIONInventors: Keiichi HIWATASHI, Daisuke UMETSU, Osamu SUNAHARA, Yasunori TAKAHARA, Daisaku OGAWA, Takahiro KAWAMURA, Chikako OHISA
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Publication number: 20180079406Abstract: The vehicle behavior control device comprises: a steer-by-wire type steering apparatus (6) having a steering wheel-side mechanism and a road wheel-side mechanism which are mechanically separated from each other; and a controller (8) performs a driving force reduction control when a steering speed in the steering apparatus (6) becomes equal to or greater than a given threshold. The steering apparatus (6) comprises a first steering angle sensor (14) provided in the steering wheel-side mechanism and a second steering angle sensor (19) provided in the road wheel-side mechanism. The controller (8) performs the driving force reduction control using the first steering angle sensor (14) when a yaw rate or a steering speed is equal to or greater than a given value, and performs the driving force reduction control using the second steering angle sensor (19) when the yaw rate or the steering speed is less than the given value.Type: ApplicationFiled: September 20, 2017Publication date: March 22, 2018Applicant: MAZDA MOTOR CORPORATIONInventors: Tomoji IZUMI, Yasunori TAKAHARA, Daisuke UMETSU, Osamu SUNAHARA, Masaki CHIBA
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Publication number: 20180079407Abstract: The vehicle behavior control device comprises: a steer-by-wire type steering apparatus (6) having a steering wheel-side mechanism and a road wheel-side mechanism which are mechanically separated from each other; and a controller (8) performs a driving force reduction control of reducing a driving force for a vehicle (1) when a steering speed in the steering apparatus (6) becomes equal to or greater than a given threshold. The steering apparatus (6) comprises a first steering angle sensor (14) provided in the steering wheel-side mechanism and a second steering angle sensor (19) provided in the road wheel-side mechanism. The controller (8) performs the driving force reduction control based on the steering speed in accordance with a sum of an output of the first steering angle sensor (14) and an output of the second steering angle sensor (19).Type: ApplicationFiled: September 20, 2017Publication date: March 22, 2018Applicant: MAZDA MOTOR CORPORATIONInventors: Tomoji IZUMI, Yasunori TAKAHARA, Daisuke UMETSU, Osamu SUNAHARA, Masaki CHIBA
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Publication number: 20180072317Abstract: A vehicle control device includes a drive source for generating torque as driving force that causes a vehicle to travel, a drive source control mechanism for controlling the torque generation by the drive source, a driving force transmission mechanism for transmitting the torque to vehicle wheels, an engageable element provided in the transmission mechanism, and a processor configured to execute an engagement state change control in which an engagement state of the engageable element is changed, a vehicle attitude controlling module for controlling attitude of the vehicle by driving the drive source control mechanism to reduce the torque so as to decelerate the vehicle, when a condition is satisfied, the condition being that the vehicle is traveling and a steering angle related value increases, and an engagement state change restricting module for restricting the execution of the engagement state change control while the vehicle attitude control is executed.Type: ApplicationFiled: September 12, 2017Publication date: March 15, 2018Inventors: Keiichi Hiwatashi, Yasunori Takahara, Daisaku Ogawa, Daisuke Umetsu, Osamu Sunahara, Chikako Ohisa
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Publication number: 20180066625Abstract: A vehicle control device is provided, which includes an engine including an ignition plug oriented inside a combustion chamber, a component provided in or near an exhaust passage of the engine, a processor configured to execute a vehicle attitude controlling module for controlling an attitude of a vehicle by retarding an ignition timing of the ignition plug to reduce an engine torque so as to decelerate the vehicle, when a condition is satisfied, the condition being that the vehicle is traveling and a steering angle related value that is related to a steering angle of a steering device increases, and a torque reduction restricting module for restricting a reduction amount of the engine torque as at least one of an engine load and an engine speed increases during the vehicle attitude control.Type: ApplicationFiled: September 6, 2017Publication date: March 8, 2018Inventors: Keiichi Hiwatashi, Yasunori Takahara, Daisaku Ogawa, Daisuke Umetsu, Chikako Ohisa, Koichi Kimoto
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Patent number: 9889846Abstract: The vehicle behavior control device is designed to control a behavior of a vehicle having steerable front road wheels. The vehicle behavior control device comprises a PCM configured to perform control to reduce a torque for the vehicle according to a steering speed of the vehicle, and acquire an understeer-causing state of the vehicle which is a factor causing understeer, wherein the PCM is further configured to perform control to, after reducing the torque, increase the torque at a change rate decided based on the understeer-causing state of the vehicle acquired by the PCM.Type: GrantFiled: November 2, 2016Date of Patent: February 13, 2018Assignee: MAZDA MOTOR CORPORATIONInventors: Osamu Sunahara, Daisuke Umetsu