公开(公告)号：US11827211B2

公开(公告)日：2023-11-28

申请号：US17648760

申请日：2022-01-24

Applicant: Mazda Motor Corporation

Inventor： Daisaku Ogawa ,  Osamu Sunahara ,  Daisuke Umetsu

IPC: B60W30/045

CPC classification number: B60W30/045 ,  B60W2540/18 ,  B60W2710/083 ,  B60W2720/106

Abstract: A control system for a vehicle is provided, which includes a driving force source configured to generate torque for driving drive wheels, a steering wheel, a steering angle sensor, and a controller. Based on the detected steering angle, the controller reduces the driving torque to add deceleration to the vehicle when the steering wheel is being turned in one direction, and increases the torque to add acceleration when the steering wheel is being turned back in the other direction. The controller controls the torque, when the steering wheel is being turned in the returning direction from a state where it is turned in the one direction, so as to add forward acceleration until the steering wheel returns to a neutral position, and when the steering wheel is then being turned in the other direction after passing through the neutral position, so as not to add the forward acceleration.

公开(公告)号：US11767017B2

公开(公告)日：2023-09-26

申请号：US17716272

申请日：2022-04-08

Applicant: Mazda Motor Corporation

Inventor： Naoki Nobutani ,  Yasumasa Imamura ,  Daisuke Umetsu ,  Naoki Takata ,  Juntaro Matsuo

IPC: B60W30/182 ,  B60W50/14

CPC classification number: B60W30/182 ,  B60W50/14 ,  B60W2530/203 ,  B60W2540/215

Abstract: A travel mode switching device for a vehicle is provided, which is switchable between a plurality of travel modes including a sport travel mode and a towing travel mode. The device includes a travel mode selection interface that allows a driver to select one of the travel modes, a towing detection sensor that detects a towing state, and a processor configured to execute a travel mode switching module to switch the travel mode to the travel mode selected by the travel mode selection interface, and a travel mode regulating module to regulate the selection of the sport travel mode by the travel mode selection interface when the towing state is detected by the towing detection sensor, and regulate the selection of the towing travel mode by the travel mode selection interface when the towing state is not detected.

公开(公告)号：US11447112B2

公开(公告)日：2022-09-20

申请号：US16882034

申请日：2020-05-22

Applicant: MAZDA MOTOR CORPORATION

Inventor： Naoki Hiraga ,  Daisuke Umetsu ,  Fuminori Kato ,  Hiroyuki Ogata

IPC: B60T8/24 ,  B60T8/60 ,  B60T8/17 ,  B60T8/1755 ,  B60T8/171 ,  B60T8/26 ,  B60T8/74

Abstract: Disclosed is a vehicle attitude control system for controlling the attitude of a vehicle in which a road wheel suspension is configured such that a roll axis of a vehicle body inclines downwardly in a forward direction. The vehicle attitude control system includes: a lateral acceleration sensor operable to detect a lateral acceleration; a brake actuator operable to apply a braking force; and a brake control device operable, based on a traveling state of the vehicle, to generate the braking force, wherein the brake control device is configured to execute vehicle attitude control of applying, to an inner rear road wheel, a larger braking force when the lateral acceleration of the vehicle is relatively large than when the lateral acceleration is relatively small, thereby suppressing uplift of an inner rear portion of the vehicle body.

公开(公告)号：US20220234571A1

公开(公告)日：2022-07-28

申请号：US17648760

申请日：2022-01-24

Applicant: Mazda Motor Corporation

Inventor： Daisaku Ogawa ,  Osamu Sunahara ,  Daisuke Umetsu

IPC: B60W30/045

Abstract: A control system for a vehicle is provided, which includes a driving force source configured to generate torque for driving drive wheels, a steering wheel, a steering angle sensor, and a controller. Based on the detected steering angle, the controller reduces the driving torque to add deceleration to the vehicle when the steering wheel is being turned in one direction, and increases the torque to add acceleration when the steering wheel is being turned back in the other direction. The controller controls the torque, when the steering wheel is being turned in the returning direction from a state where it is turned in the one direction, so as to add forward acceleration until the steering wheel returns to a neutral position, and when the steering wheel is then being turned in the other direction after passing through the neutral position, so as not to add the forward acceleration.

公开(公告)号：US11332144B2

公开(公告)日：2022-05-17

申请号：US16752369

申请日：2020-01-24

Applicant: MAZDA MOTOR CORPORATION

Inventor： Yasumasa Imamura ,  Naoki Nobutani ,  Daisuke Umetsu

IPC: B60W30/188 ,  B60K17/04 ,  B60K17/24 ,  B60W10/04 ,  B60W10/119 ,  B62D1/04 ,  B62D15/02 ,  F02D41/02 ,  B60K17/22

Abstract: A vehicle system comprises an engine driving a vehicle, a front wheel and a rear wheel, a suspension device with an attachment portion to a vehicle body which is located at a higher level than a center axis of the rear wheel, an electromagnetic coupling to distribute a torque of the engine to the front wheel and the rear wheel, a steering wheel to be operated by a driver, a steering angle sensor to detect a steering angle corresponding to operation of the steering wheel, and a controller to control the engine and the electromagnetic coupling. The controller is configured to control the electromagnetic coupling such that the torque distributed to the rear wheel is increased in accordance with turning operation of the steering wheel which is detected by the steering angle sensor.

公开(公告)号：US11041450B2

公开(公告)日：2021-06-22

申请号：US16489384

申请日：2018-03-09

Applicant: Mazda Motor Corporation

Inventor： Daisaku Ogawa ,  Osamu Sunahara ,  Yasunori Takahara ,  Chikako Ohisa ,  Yuichiro Akiya ,  Atsushi Yamasaki ,  Keiichi Hiwatashi ,  Daisuke Umetsu

IPC: F02D17/02 ,  B60W10/06 ,  F02D41/00

Abstract: A vehicle control device includes an engine 10 capable of switching between reduced-cylinder operation and all-cylinder operation, an engine control mechanism that controls an engine torque, and a PCM 50 that executes vehicle posture control for generating vehicle deceleration by controlling the engine control mechanism to reduce the engine torque upon satisfaction of a condition that a vehicle is travelling and a steering angle-related value related to a steering angle of a steering device increases. In addition, this PCM 50 permits the execution of the vehicle posture control when an engine rotation speed is more than or equal to a first rotation speed Ne1 and permits the execution of the reduced-cylinder operation of the engine 10 when the engine rotation speed is more than or equal to a second rotation speed Ne2 that is more than the first rotation speed Ne1.

公开(公告)号：US10968856B2

公开(公告)日：2021-04-06

申请号：US16960613

申请日：2019-01-22

Applicant: MAZDA MOTOR CORPORATION

Inventor： Shinji Takayama ,  Takeatsu Ito ,  Michio Ito ,  Kenko Ujihara ,  Daisaku Ogawa ,  Daisuke Umetsu

IPC: F02D41/30 ,  F02B11/02 ,  B62D3/02 ,  B62D15/02 ,  F02P5/04 ,  F02D41/14 ,  F02P5/15

Abstract: When an incremental amount of a steering angle exceeds a reference incremental amount, an ECU 60 executes vehicle attitude control of reducing an output torque of an engine, and, in a given operating range, drives a spark plug 16 in a manner allowing an air-fuel mixture to be self-ignited at a given timing, thereby executing SPCCI combustion. When there is a request for an additional deceleration from the vehicle attitude control (#12: YES), and the SPCCI combustion is performed (#13: YES), the ECU 60 executes fuel amount reduction control of reducing the amount of fuel to be supplied into a cylinder 2 (#14), so as to attain torque reduction for the vehicle attitude control. On the other hand, when the SPCCI combustion is not performed (#13: NO), the ECU 60 executes ignition retardation control of retarding an ignition timing of the spark plug 16 (#15).

公开(公告)号：US10850726B2

公开(公告)日：2020-12-01

申请号：US16084157

申请日：2017-03-30

Applicant: MAZDA MOTOR CORPORATION

Inventor： Toru Yoshioka ,  Daisuke Umetsu ,  Osamu Sunahara ,  Yasunori Takahara ,  Masaki Chiba

IPC: B60W30/045

Abstract: There is provided a vehicle behavior control device capable of improving responsivity of a vehicle behavior and a linear feeling with respect to a steering wheel operation without causing a driver to experience a strong feeling of intervention of the control and, at the same time, capable of controlling behavior of a vehicle in such a manner as to also improve stability of the vehicle attitude and riding comfort. In a vehicle behavior control device applied to a vehicle 1 having steerable front road wheels 2, the vehicle behavior control device includes a PCM 14 which acquires a steering speed of the vehicle, and increases a pitch angle in such a direction that a front portion of the vehicle dips when the steering speed becomes equal to or greater than a given threshold TS1 which is greater than zero.

公开(公告)号：US20200370608A1

公开(公告)日：2020-11-26

申请号：US16875803

申请日：2020-05-15

Applicant: Mazda Motor Corporation

Inventor： Yasumasa Imamura ,  Naoki Nobutani ,  Keisuke Haruta ,  Daisuke Umetsu ,  Yasushi Yagi

IPC: F16D48/06

Abstract: A driving force distribution control device mounted on a four-wheel drive vehicle is provided. A coupling mechanism controller connects a drive shaft with an auxiliary driving wheel and sets a fastening force as a first fastening force, when an increase rate in an accelerator opening becomes more than a given value and a vehicle speed is below a given first speed, and changes the fastening force from the first fastening force to a second fastening force, when a slip of at least one of main driving wheels is detected after the fastening force is set to the first fastening force, and before a given time period has lapsed from the setting of the fastening force, or before the vehicle speed becomes faster than a given second speed. The second fastening force at least immediately after the change of the fastening force is a value larger than the first fastening force.

公开(公告)号：US20200331461A1

公开(公告)日：2020-10-22

申请号：US16839323

申请日：2020-04-03

Applicant: Mazda Motor Corporation

Inventor： Yasumasa Imamura ,  Taku Yoshida ,  Daisuke Umetsu

IPC: B60W30/045 ,  B60K23/08 ,  B60W10/119 ,  B60W10/184

Abstract: A vehicle system includes a drive source configured to generate torque for driving a vehicle, wheels including rear wheels that are primary driving wheels and front wheels that are auxiliary driving wheels, a torque distribution mechanism configured to distribute the torque of the drive source to the front wheels and the rear wheels, a steering wheel configured to be operated by a driver, and a controller configured to control at least the torque distribution mechanism. When the steering wheel is steered in reverse and a yaw rate difference related value related to a difference between a target yaw rate to be generated on the vehicle according to the steering of the steering wheel and an actual yaw rate actually generated on the vehicle is greater than or equal to a first predetermined value, the controller controls the torque distribution mechanism to reduce the torque distributed to the rear wheels.