公开(公告)号：US11739703B2

公开(公告)日：2023-08-29

申请号：US17669594

申请日：2022-02-11

Applicant: Mazda Motor Corporation

Inventor： Daisaku Ogawa ,  Daisuke Umetsu

IPC: F02D41/12 ,  F02D41/02 ,  F02P5/145

CPC classification number: F02D41/12 ,  F02D41/021 ,  F02P5/145 ,  F02D2200/50 ,  F02D2200/602 ,  F02D2200/604 ,  F02D2250/18

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 angle related value sensor configured to detect a steering angle related value of a steering device, and a controller configured to control the torque to control the vehicle attitude based on the steering angle related value. The controller acquires a current traveling mode defining a response of acceleration or deceleration of the vehicle to an accelerator pedal operation. Based on the steering angle related value, when determined that a turning operation of the steering device in one direction is performed, the controller performs a torque decreasing control to add deceleration to the vehicle. When the acquired traveling mode is a high response traveling mode, the controller increases a reduction amount of the torque in the torque decreasing control more than in a low response traveling mode.

公开(公告)号：US11518405B2

公开(公告)日：2022-12-06

申请号：US16955413

申请日：2019-01-22

Applicant: MAZDA MOTOR CORPORATION

Inventor： Daisaku Ogawa ,  Daisuke Umetsu ,  Setsuya Kishimura

IPC: B60W60/00 ,  B60W10/18 ,  B60W10/20 ,  B60W10/04 ,  B60W40/114

Abstract: Provided is a vehicle control system capable of, when a swaying phenomenon occurs during towing, preventing the swaying phenomenon from becoming worse due to driving force reduction control based on an increase in steering angle-related value. This vehicle control system comprises a steering wheel, a driving force control mechanism to control a driving force of a vehicle, and a power-train control module to control the driving force control mechanism. The power-train control module is operable, upon an increase in steering angle, to control an engine to reduce an output torque of the engine and, when a reversal of yaw rate of the vehicle is repeated in a situation where the vehicle is performing a towing operation, to restrict the output torque reduction based on the increase in the steering angle.

公开(公告)号：US20220260029A1

公开(公告)日：2022-08-18

申请号：US17668702

申请日：2022-02-10

Applicant: Mazda Motor Corporation

Inventor： Daisaku Ogawa ,  Daisuke Umetsu

IPC: F02D41/12 ,  F02D41/02 ,  F02P5/145

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 angle related value sensor configured to detect a steering angle related value of a steering device of the vehicle, a grille shutter configured to adjust an opening-and-closing degree of an opening formed in a front surface of a vehicle body, and a controller configured to control the torque to control a vehicle attitude based on the steering angle related value. Based on the steering angle related value, when the controller determines that a turning operation of the steering device is performed, it performs a torque decreasing control for reducing the torque to add deceleration to the vehicle, and when the grille shutter opening is large, the controller increases the torque reduction amount in the torque decreasing control more than when the opening is small.

公开(公告)号：US11313312B2

公开(公告)日：2022-04-26

申请号：US16963122

申请日：2019-01-16

Applicant: MAZDA MOTOR CORPORATION

Inventor： Shinji Takayama ,  Takeatsu Ito ,  Masahiro Nagoshi ,  Yuichiro Akiya ,  Yuto Matsushima ,  Kenko Ujihara ,  Daisaku Ogawa ,  Daisuke Umetsu

IPC: F02D37/02 ,  F02D41/30 ,  F02D41/40 ,  F02D41/00

Abstract: A control unit performs a vehicle attitude control to reduce a torque generated by an engine when an increase in a steering angle exceeds a standard increase, and a spark ignition controlled compression ignition combustion in a predetermined operating range. In the spark ignition controlled compression ignition combustion, switching of an air-fuel ratio mode is performed between a first air-fuel ratio mode (λ>1) is formed and a second air-fuel ratio mode (in which a mixed gas of λ≤1) is formed. If the switching of the air-fuel ratio mode is requested without the vehicle attitude control, the control unit allows performing the requested switching of the air-fuel ratio mode. In contrast, if the mode switching is requested in a state where the vehicle attitude control is requested, the control unit disallows switching of the air-fuel ratio mode even when the switching of the air-fuel ratio mode is requested.

公开(公告)号：US11242817B2

公开(公告)日：2022-02-08

申请号：US16962482

申请日：2019-01-16

Applicant: MAZDA MOTOR CORPORATION

Inventor： Shinji Takayama ,  Takeatsu Ito ,  Masahiro Nagoshi ,  Yuichiro Akiya ,  Yuto Matsushima ,  Kenko Ujihara ,  Daisaku Ogawa ,  Daisuke Umetsu

IPC: F02D37/02 ,  F02D41/30 ,  F02B1/12 ,  F02D41/00 ,  F02D41/38

Abstract: An engine control method includes a step of setting combustion mode in which a first combustion mode in which a mixed gas is combusted by propagating flame or a second combustion mode in which the mixed gas is combusted by self-ignition is selected, a step of setting air-fuel ratio mode in which a lean first air-fuel ratio mode or a second air-fuel ratio mode equal to or richer than a theoretical air-fuel ratio is selected, a step of setting torque reduction in which a torque reduction amount by which a torque generated by an engine is reduced based on a steer angle of a steering wheel, and a suppressing step in which reducing the torque generated by the engine based on the torque reduction amount set in the step of setting torque reduction is suppressed.

公开(公告)号：US11091150B2

公开(公告)日：2021-08-17

申请号：US16489452

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: B60W30/045 ,  B60W10/06 ,  B60W10/10 ,  B60W30/18 ,  B60W30/188 ,  F02D41/12

Abstract: A vehicle control device includes an engine (10), an engine control mechanism that controls an engine torque, and a PCM (50) that performs 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. When a driver performs an accelerator operation for reducing an accelerator opening during execution of vehicle posture control, the PCM (50) suppresses reduction of a generated torque of the engine due to the accelerator operation.

公开(公告)号：US20210245600A1

公开(公告)日：2021-08-12

申请号：US17102102

申请日：2020-11-23

Applicant: Mazda Motor Corporation

Inventor： Yasumasa Imamura ,  Daisuke Umetsu ,  Yoichi Fujioka ,  Naoki Nobutani

IPC: B60K23/08 ,  B60K17/02 ,  B60K17/348

Abstract: A driving force distribution control system for a four-wheel drive vehicle is provided. The four-wheel drive vehicle uses front wheels as main driving wheels, and when a towed vehicle is coupled to a coupling part provided to a rear part of the four-wheel drive vehicle, the towed vehicle has the center of gravity position so that a downward load in a vehicle up-and-down direction is applied to the rear part of the vehicle through the coupling part. A driving force distribution control device includes a towing determination module configured to determine whether the vehicle is towing the towed vehicle, and when it is determined that the vehicle is towing the towed vehicle, a driving force distribution control device controls the driving force distributing device so that the driving force distributing amount to rear wheels becomes larger than that when the four-wheel drive vehicle is not towing the towed vehicle.

公开(公告)号：US11008930B2

公开(公告)日：2021-05-18

申请号：US16960502

申请日：2019-01-22

Applicant: MAZDA MOTOR CORPORATION

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

IPC: F02B11/00 ,  F02D41/02 ,  F02D41/14 ,  B62D15/02 ,  F02P5/14

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 to allow 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 prohibits ignition retardation and performs torque reduction for the vehicle attitude control, by fuel amount reduction control of reducing the amount of fuel to be supplied into a cylinder 2 (#14). On the other hand, when the SPCCI combustion is not performed (NO in #13), the ECU 60 performs the ignition retardation to attain the torque reduction for the vehicle attitude control (#15).

公开(公告)号：US10569765B2

公开(公告)日：2020-02-25

申请号：US15341634

申请日：2016-11-02

Applicant: MAZDA MOTOR CORPORATION

Inventor： Osamu Sunahara ,  Daisuke Umetsu

IPC: B60W30/045 ,  B62D15/02

Abstract: A PCM (14) for controlling a behavior of a vehicle (1) having steerable front road wheels is configured to perform a control to reduce a driving force for the vehicle (1) according to a yaw rate-related quantity (e.g., steering speed) of the vehicle (1). Specifically, the PCM (14) is configured, after reducing the driving force in response to a change in the yaw rate-related quantity and according to the yaw rate-related quantity being changing, to increase the driving force so as to restore a value of the driving force before the reduction, and the PCM (14) is operable, when increasing the driving force so as to restore a value of the driving force before the reduction, to change a change rate during the increasing of the driving force, according to a magnitude of the yaw rate-related quantity thereduring.

公开(公告)号：US10526981B2

公开(公告)日：2020-01-07

申请号：US15338081

申请日：2016-10-28

Applicant: Mazda Motor Corporation

Inventor： Chikako Ohisa ,  Osamu Sunahara ,  Daisuke Umetsu ,  Takahiro Kawamura ,  Yasunori Takahara ,  Daisaku Ogawa ,  Takeatsu Ito

IPC: F02D37/02 ,  F02D41/00 ,  F02P5/145 ,  F02P5/15 ,  F02D41/18

Abstract: An engine control device is provided, that includes an air amount controller, an ignition timing controller, a basic target torque determinator which determines a basic target torque, a change rate acquirer for acquiring a change rate of a steering operation, a target additional deceleration setter for increasing a target additional deceleration while an increase rate thereof becomes less as the change rate increases, a torque reduction amount determinator for determining an engine torque reduction amount, a final target torque determinator for determining a final target torque, and an actual air amount estimator for estimating an actual air amount introduced into a combustion chamber. The air amount controller determines a target air amount and controls the intake air amount to achieve the target air amount. The ignition timing controller retards the ignition timing more as the actual air amount becomes more excessive with respect to the target amount.