公开(公告)号：US11518386B2

公开(公告)日：2022-12-06

申请号：US16825777

申请日：2020-03-20

Applicant: MAZDA MOTOR CORPORATION

Inventor： Yuichiro Akiya ,  Chikako Ohisa ,  Keitaro Ezumi ,  Akira Tsuda ,  Daisaku Ogawa ,  Daisuke Umetsu

IPC: B60W30/18 ,  B60W10/06 ,  B60W10/08

Abstract: A vehicle system comprises an engine, a motor-generator and a controller. The engine has a combustion mode in which a part of an air-fuel mixture is combusted by spark ignition, and then the remaining air-fuel mixture is combusted by self-ignition. The controller sets a target additional deceleration based on a steering angle, when a steering wheel is turned, and sets an air-fuel ratio of the air-fuel mixture to either one of a first air-fuel ratio and a second air-fuel ratio which is on a lean side, based on an operating state, when the engine performs the combustion mode. The controller controls an ignition timing so as to generate the target additional deceleration in the first air-fuel ratio, and controls a regenerative electric power generation of the motor-generator so as to generate the target additional deceleration in the second air-fuel ratio.

公开(公告)号：US11472396B2

公开(公告)日：2022-10-18

申请号：US16970108

申请日：2019-02-19

Applicant: MAZDA MOTOR CORPORATION

Inventor： Daisuke Umetsu

IPC: B60W10/196 ,  B60W30/045 ,  B60W40/13

Abstract: Disclosed is a vehicle control method which comprises the steps of: determining whether or not a squat of a rear end of a vehicle body is equal to or greater than a given level; determining whether or not turning manipulation of a steering device has been made; and, when the turning manipulation of the steering device is determined to have been made, controlling each part of an engine (4) to reduce an output torque of the engine (4), wherein, in response to the determination that the turning manipulation of the steering device has been made, a reduction amount of the output torque of the engine is increased when the squat of the rear end of the vehicle body is equal to or greater than the given level, as compared to when the squat is less than the given level.

公开(公告)号：US11433879B2

公开(公告)日：2022-09-06

申请号：US16758059

申请日：2018-11-29

Applicant: MAZDA MOTOR CORPORATION

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

IPC: B60W30/045 ,  B60W30/18 ,  B62D1/04 ,  F02D11/02

Abstract: A vehicle control system comprises: an engine (4); an accelerator position sensor (10) configured to detect the position of an accelerator pedal; a steering device; a PCM (14) configured to generate a deceleration in the vehicle to control the attitude of the vehicle, when a steering angle-related value as a parameter related to a steering angle of the steering device increases; and a brake unit (16) configured to generate a deceleration in the vehicle, independently of reduction of an output torque of the engine, wherein the PCM is configured to generates the deceleration by means of the reduction of the output torque of the engine when a depression of the accelerator pedal is detected by the accelerator position sensor, and to generate the deceleration by the brake unit (16) when the depression of the accelerator pedal is not detected by the accelerator position sensor.

公开(公告)号：US20220001751A1

公开(公告)日：2022-01-06

申请号：US17356202

申请日：2021-06-23

Applicant: Mazda Motor Corporation

Inventor： Daisuke Umetsu ,  Shinya Morishita

IPC: B60L15/20 ,  B60K17/00 ,  B60K26/02 ,  B62D1/04

Abstract: A powertrain system for an electric automobile outputs a desired torque from a motor with an angle of an accelerator pedal that is easy for a driver to operate, regardless of traveling environments such as the road surface gradient and the wind direction. The powertrain system includes a paddle switch and a shifter that are mounted to be operable by a driver, and are electrically connected directly or indirectly to an electronic control unit (ECU). The ECU controls, based on a torque control map defining the relationship between an accelerator pedal opening and output torque of a motor in advance, the output torque of the motor according to the accelerator pedal opening, and changes, based on an operation on the paddle switch or the shifter, the torque control map to be used for controlling the output torque of the motor.

公开(公告)号：US11136931B2

公开(公告)日：2021-10-05

申请号：US16633366

申请日：2018-05-11

Applicant: MAZDA MOTOR CORPORATION

Inventor： Daisuke Umetsu

IPC: B60G17/015 ,  F02D41/12 ,  B62D15/02 ,  F02D41/30 ,  F02P5/14 ,  B60W30/045 ,  B60W30/18

Abstract: Provided is a vehicle control system capable of controlling the behavior of a vehicle, in conformity to a tire longitudinal spring constant, to improve responsivity and linear feeling of the vehicle behavior with respect to a steering manipulation. The vehicle control system comprises a steering angle sensor (8) and a PCM (14). The PCM is configured to set, based on a detection value of the steering angle sensor, an additional deceleration to be added to a vehicle (1), and control the vehicle to generate the set additional deceleration in the vehicle, wherein the additional deceleration is set to be larger when a tire longitudinal spring constant (Kt) of each road wheel of the vehicle is relatively small than when it is not relatively small.

公开(公告)号：US20210197894A1

公开(公告)日：2021-07-01

申请号：US16953735

申请日：2020-11-20

Applicant: Mazda Motor Corporation

Inventor： Daisuke Umetsu ,  Yasumasa Imamura

IPC: B62D15/02 ,  B60W30/08

Abstract: A control system for a vehicle is provided, which includes an accelerator pedal and a steering wheel configured to be operated by a driver, an accelerator opening sensor configured to detect an accelerator opening corresponding to operation of the accelerator pedal, a steering angle sensor configured to detect a steering angle corresponding to operation of the steering wheel, and a controller configured to set an additional deceleration to be applied to the vehicle in order to control a posture of the vehicle based on the detected steering angle, when the steering wheel is turned, and apply the additional deceleration to the vehicle. The controller sets the additional deceleration based on the detected accelerator opening, in addition to the steering angle, and sets the additional deceleration larger while the vehicle is towing than while the vehicle is not towing, when the additional decelerations are compared at the same accelerator opening.

公开(公告)号：US10562537B2

公开(公告)日：2020-02-18

申请号：US15713330

申请日：2017-09-22

Applicant: MAZDA MOTOR CORPORATION

Inventor： Keiichi Hiwatashi ,  Daisuke Umetsu ,  Osamu Sunahara ,  Yasunori Takahara ,  Daisaku Ogawa ,  Takahiro Kawamura ,  Chikako Ohisa

IPC: B60W40/105 ,  B60W10/02 ,  B60W10/04 ,  B60W40/10 ,  F02P5/15

Abstract: The vehicle control device is designed to control a vehicle equipped with an engine, and an automatic transmission comprising a torque converter with a lockup clutch. The vehicle control device comprises a controller configured to perform control of changing an engagement degree of the lockup clutch 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 torque of the engine to generate a deceleration of the vehicle to thereby execute a torque reduction control for controlling an attitude of the vehicle. The controller is configured to reduce the output torque of the engine, in accordance with the engagement degree of the lockup clutch controlled by a lockup control.

公开(公告)号：US10465614B2

公开(公告)日：2019-11-05

申请号：US15763681

申请日：2016-12-22

Applicant: MAZDA MOTOR CORPORATION

Inventor： Keiichi Hiwatashi ,  Yasunori Takahara ,  Daisaku Ogawa ,  Daisuke Umetsu ,  Osamu Sunahara ,  Chikako Ohisa ,  Koichi Kimoto

IPC: B60W30/045 ,  F02D17/02 ,  B60W40/114 ,  B62D6/00 ,  B60W30/18 ,  F02D31/00

Abstract: 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.

公开(公告)号：US10246084B2

公开(公告)日：2019-04-02

申请号：US15710332

申请日：2017-09-20

Applicant: MAZDA MOTOR CORPORATION

Inventor： Tomoji Izumi ,  Yasunori Takahara ,  Daisuke Umetsu ,  Osamu Sunahara ,  Masaki Chiba

IPC: B60W30/02 ,  B60W30/045 ,  B62D6/00 ,  B62D15/02 ,  B60W10/20 ,  B60K17/30

Abstract: A 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.

公开(公告)号：US20170145931A1

公开(公告)日：2017-05-25

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

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.