Mazda Motor Corporation

Mazda Motor Corporat Ion

Yasunori Takahara

Daisuke Umetsu

Osamu Sunahara

Chikako Ohisa

Daisaku Ogawa

Keiichi Hiwatashi

Atsushi Yamasaki

Masaki Chiba

Yuichiro Akiya

Takahiro Kawamura

Takeatsu Ito

Koichi Kimoto

Tomoji Izumi

Toru Yoshioka

Hiroyuki Okamoto

Yugou Sunagare

Fumihiro Kurohara

Takuo Hirano

Kunihiro Shishima

Taizo Ohmae

Ippei Kuroda

Hiroto Kido

Norio Asano

Tom Yoshioka

Kazunori Tsumura

Hirofumi Fujishita

A vehicle control apparatus has a steering wheel, an enginefor outputting a driving force of a vehicle, a brake apparatuscapable of applying different braking forces to left and right wheels, and a PCMincluding a processor and the like. When executing vehicle yaw control, which controls the brake apparatusto apply to the vehiclea yaw moment in the direction opposite to the yaw rate generated in the vehicle, after executing vehicle attitude control for reducing an output torque of the enginebased on a turning operation of the steering wheel, when the control amount of the vehicle attitude control is large, the PCMincreases the control amount of the vehicle yaw control compared to when the control amount of the vehicle attitude control is not large.

Vehicle control apparatus

A front suspension apparatus in which a front side of a suspension arm can be cut off from a subframe at the time of a small overlap collision without a complication of structure and formability. A front suspension apparatus in which a lower arm from which a front wheel is suspended is provided, and a front arm portion and a rear arm portion of the lower arm are axially supported by axially supporting portions of a subframe is characterized in that an axially supporting portion of the front arm portion is joined to the subframe at a joined portion extending in a vehicle width direction, a joined portion extending in an up-down direction, and a joined portion extending in a front-rear direction, and a joining strength of a joined portion in the front-rear direction is lower than a joining strength of the joined portion in the up-down direction.

Front suspension apparatus

A vehicle control system comprises: an engine (); an accelerator position sensor () configured to detect the position of an accelerator pedal; a steering device; a PCM () 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 () 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 () when the depression of the accelerator pedal is not detected by the accelerator position sensor.

Vehicle control system

A subframe structure of a front suspension that leads a subframe and a vehicle driving apparatus to the lower side after separation of a rear portion of the subframe due to a frontal collision without increasing weight and parts. A subframe structure of the front suspension provides a subframe that supports a vehicle driving apparatus in a mounting manner, and a rear portion of the subframe is mounted on a lower portion of a vehicle body via a fastening member. Fastening between the subframe and the fastening member is configured such that the rear portion of the subframe is separated when a collision load to a vehicle rear side is applied to the subframe. A leading guide portion that abuts against the fastening member and leads the subframe to a lower side after separation from the fastening member is integrally formed on the rear portion of the subframe.

Subframe structure of front suspension

The vehicle behavior control device comprises a brake control system () capable of applying different braking forces, respectively, to right and left road wheels of a vehicle (). The vehicle behavior control device further comprises: a steering angle sensor (); a vehicle speed sensor (); a yaw rate sensor (); and a yaw moment setting part () in PCM () configured to decide a target yaw rate of the vehicle based on a steering angle and a vehicle speed, and set, based on a change rate of a difference between an actual yaw rate and the target yaw rate, a yaw moment oriented in a direction opposite to that of the actual yaw rate of the vehicle, as a target yaw moment, whereby the brake control system can regulate the braking forces of the road wheels so as to apply the target yaw moment to the vehicle.

Vehicle behavior control device

A vehicle control device includes an engine (), an engine control mechanism that controls an engine torque, and a PCM () 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 () suppresses reduction of a generated torque of the engine due to the accelerator operation.

Vehicle control device

A vehicle control device includes an enginecapable of switching between reduced-cylinder operation and all-cylinder operation, an engine control mechanism that controls an engine torque, and a PCMthat 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 PCMpermits the execution of the vehicle posture control when an engine rotation speed is more than or equal to a first rotation speed Neand permits the execution of the reduced-cylinder operation of the enginewhen the engine rotation speed is more than or equal to a second rotation speed Nethat is more than the first rotation speed Ne

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 vehiclehaving steerable front road wheelsthe vehicle behavior control device includes a PCMwhich 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 Twhich is greater than zero.

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 vehiclehaving steerable front road wheels, the vehicle behavior control device includes a PCMwhich acquires a steering speed of the vehicle, and increases a vertical load on the front road wheels when the steering speed becomes equal to or greater than a given threshold Twhich is greater than zero.

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 having steerable front road wheels, the vehicle behavior control device includes a PCM which acquires a steering speed of the vehicle, and generates a deceleration jerk which is a rearward jerk in a longitudinal direction of the vehicle when the steering speed becomes equal to or greater than a given threshold Twhich is greater than zero.

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.

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.

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 capable of controlling behavior in such a manner as to improve stability of the vehicle attitude and riding comfort. The device includes a PCM which acquires a steering speed relating to a jerk in a width direction of the vehicle, sets a torque reduction flag, indicative of whether or not a condition for allowing reduction of an output torque of an engine is satisfied, based on the steering speed, and starts to reduce a torque when the torque reduction flag is set to True indicative of a state in which the condition for allowing reduction of the torque is satisfied.

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.

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.

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Hiroshima, Japan

Yasunori Takahara