Subaru Corporation

Toyota Jidosha Kabushiki Kaisha

Fuji Jukogyo Kabushiki Kaisha

Hiroshi Ienaga

Takeshi Yoneda

Takahiro Kobayashi

Fumiyuki Moriya

Shinichi Sakaguchi

Junya Ogasahara

Yuichi Tanaka

Hideki Kubonoya

Kentaro Ishii

Akihito Katsume

Junichi Murase

Masamichi Iwama

An electrified vehicle disclosed in the present specification includes: a motor configured to rotate a drive wheel of the electrified vehicle; a sensor configured to detect a motor rotation number that is the number of rotations of the motor; and a control device configured to perform feedback control of the motor rotation number based on a value detected by the sensor. The control device is configured to perform during the feedback control a process of extracting a vibration component in a predetermined frequency band from the value detected by the sensor, a process of calculating an integrated value by integrating the extracted vibration component for a predetermined period, and a process of determining whether the calculated integrated value falls within a predetermined abnormal range.

Electrified vehicle

A road surface friction coefficient estimation apparatus for a vehicle includes: a first estimator; a second estimator; and a third estimator. The first estimator estimates a first road surface friction coefficient on a basis of a vehicle information acquired from the vehicle. The second estimator estimates a second road surface friction coefficient on a basis of an external information acquired from an outside of the vehicle. The third estimator estimates a road surface friction coefficient from the first road surface friction coefficient and the second road surface friction coefficient on a basis of a first reliability degree and a second reliability degree, the first reliability degree indicating a reliability of the first road surface friction coefficient, the second reliability degree indicating a reliability of the second road surface friction coefficient.

Road surface friction coefficient estimation apparatus for vehicle and road surface friction coefficient estimation method for vehicle

A braking control device for a vehicle includes an anti-lock controller and a resonance controller. The anti-lock controller is configured to perform an anti-lock control that includes making an adjustment to the braking torque command, to cause suppression of one or more wheels from being locked during braking of the vehicle. The resonance controller is configured to correct the braking torque command, to control resonance of a power transmitter. The resonance controller includes a resonance generation processor that is configured to generate the resonance while imposing a limitation on magnitude of the resonance. The resonance controller is configured to suppress the resonance except during the anti-lock control, and allow the resonance generation processor to generate the resonance while imposing the limitation on the magnitude of the resonance during the anti-lock control.

Braking control device for vehicle

A vehicle control device includes an obstacle detection unit that detects an obstacle in front of a vehicle and detects a distance to the obstacle, a maximum driving force difference calculation module that calculates, on the basis of the detected distance to the obstacle, a maximum driving force difference between a left wheel and a right wheel, and a redistribution control module that redistributes, when an actual driving force difference of respective motors that drive the left and right wheels exceeds the maximum driving force difference, torques of the respective motors in a manner that the actual driving force difference becomes lower than or equal to the maximum driving force difference.

Vehicle control device and vehicle control method

A vehicle driving force control apparatus that is provided in a vehicle provided with drive units configured to drive a driving wheel, and that is configured to control the drive units includes: a controller; and a determiner. The controller controls a driving force output by each of the drive units, within a range less than or equal to an upper limit value, on a basis of a driving command. The determiner determines whether each of the drive units is in a restriction-necessary state.

Vehicle driving force control apparatus

A vehicle control device includes: a motor information acquisition unit, a transmitting unit, a receiving unit and a motor controller. The motor information acquisition unit is configured to acquire motor information about a motor for driving a vehicle with the motor being in a predetermined state. The transmitting unit is configured to transmit the acquired motor information to an external server. The receiving unit is configured to receive an adaptive value of a motor control parameter. The adaptive value is adapted by the server on a basis of the motor information. The motor controller is configured to control the motor on a basis of the received adaptive value.

Vehicle control device, server, vehicle motor control system, and vehicle motor control method

A control apparatus of a vehicle that is provided with a drive wheel, a drive unit configured to generate, on a basis of a torque command, power directed to running, and a power transmitter configured to transmit the power derived from the drive unit to the drive wheel. The control apparatus is mounted on the vehicle and includes a resonance controller and a resonance switcher. The resonance controller is configured to output the torque command, and control resonance of the power transmitter by utilizing the torque command. The resonance switcher is configured to switch a state of the resonance controller between a resonance-restraining state that restrains the resonance and a resonance-generating state that generates the resonance.

Control apparatus of vehicle

A control apparatus for a vehicle includes: a decider; and a rotation speed controller. The decider is configured to decide on a basis of a traveling state of the vehicle that a wheel which is spun is coupled to a drive source to increase a number of driving wheels. The rotation speed controller is configured to decide increase a rotation speed of the drive source in advance in accordance with an information of a vehicle behavior unstableness degree which is acquired from an outside of the vehicle before the wheel is coupled to the drive source.

Control apparatus for vehicle and control method for vehicle

A vehicle control apparatus includes a thermal load priority calculator, a stability priority calculator, and a driving force distribution controller. The thermal load priority calculator is configured to calculate a thermal load priority that prioritizes a thermal load of a motor for driving a vehicle according to an operating state of the vehicle. The stability priority calculator is configured to calculate a stability priority that prioritizes a stability of the vehicle according to an operating state of the vehicle. The driving force distribution controller is configured to control a driving force distribution in a front and a rear of the vehicle, on a basis of a result of comparing the thermal load priority and the stability priority.

Vehicle control apparatus and vehicle control method

A vehicle control device includes a slippage determination unit, a control unit, a different-diameter determination unit and a threshold adjuster. The slippage determination unit determines that a drive wheel is slipping when an index value that is correlated with a rotation speed of the drive wheel exceeds a threshold. The control unit controls a driving force of the drive wheel such that the index value matches a target value when it is determined that the drive wheel is slipping. The different-diameter determination unit determines whether a different-diameter tire that has a different diameter from a reference diameter is mounted on the drive wheel. The threshold adjuster adjusts a threshold on the basis of a ratio between a diameter of the tire mounted on the drive wheel and the reference diameter when it is determined that the different-diameter tire is mounted on the drive wheel.

Vehicle control device

A control device for a vehicle includes a controller configured to cause a transition of distribution of driving forces of front wheels and rear wheels, from first distribution to second distribution at a predetermined time change rate, until the vehicle arrives at a point of change. The point of change is a point at which a friction coefficient of a road surface changes frontward of the vehicle.

Control device for vehicle

A cooling apparatus for an in-vehicle device includes a cooler, a traffic congestion determining unit, a cooling amount calculator, and a cooler controller. The cooling amount calculator calculates first and second cooling amounts respectively based on a heat-generation amount of a heat-generating device and a noise level inside a vehicle. The cooler controller controls the cooler on the basis of a set cooling amount. The cooler controller controls the cooler to cool the heat-generating device on the basis of the set cooling amount larger than the first cooling amount and equal to or smaller than the second cooling amount and limits a decrease rate of the set cooling amount to be smaller than an increase rate of the set cooling amount, on a condition that the traveling road is determined by the traffic congestion determining unit as being congested and the first cooling amount is smaller than the second cooling amount.

Cooling apparatus for in-vehicle device

A vehicle driving force control apparatus is mounted in a vehicle provided with a plurality of drive sources, and a plurality of power transmission mechanisms configured to transmit power from the plurality of drive sources to a plurality of wheels or a plurality of sets of wheels. The vehicle driving force control apparatus includes: a ratio determination unit and a command unit. The ratio determination unit determines a target ratio at which a required driving force applied to the vehicle is to be distributed to the plurality of wheels or the plurality of sets of wheels. The command unit commands the plurality of drive sources to output power such that driving force distributed in accordance with the target ratio is generated in the plurality of wheels or the plurality of sets of wheels.

A control device for a vehicle includes a predictor and a controller. The predictor is configured to predict, on the basis of change information, whether or not the vehicle will collide with a frontward obstacle, on the condition that a brake operation by a driver has been performed. The change information is information regarding a change in a friction coefficient of a road surface frontward of the vehicle. The controller is configured to control brake power of the vehicle on the basis of the change information, on the condition that a prediction is made that the vehicle will collide with the obstacle.

A vehicle control device includes: a requested torque acquisition module that acquires a requested torque requested to a motor that drives a wheel; a control subject designation module that designates one of a wheel speed and a motor rotation speed as a control subject on the basis of the requested torque; and a control module that performs feedback control in a manner that the control subject designated by the control subject designation module becomes equal to a target value.

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Tokyo, Japan

Hiroshi Ienaga