Nissan Motor Company Limited

Hitachi Automotive Systems, Ltd.

Hitachi Astemo Ltd.

Sony Corporation

Nippon Oil Company

Keisuke Suzuki

Satoshi Kaneko

Nobutaka Takahashi

Takeaki Obata

Hitoshi Kobayashi

Yuki Nakajima

Tatsuyuki Yamamoto

Kazuya Takahashi

Naoki Ueda

Masaaki Kobayashi

Hideo Nakamura

Kensuke Ito

Jun Kubo

Hiroyuki Ashizawa

Mitsuo Matsuno

Hiroshi Satoh

Katsuhiro Hoshino

Michihiko Matsumoto

Keizo Ikai

Ikuhiro Taniguchi

Masatoshi Iio

Hitoshi Igarashi

Masahiro Nakamizo

Hideki Sekiguchi

Yasuaki Sato

Naoki Shinohara

Haruki Sato

Motohiro Higuma

An electric vehicle control device, an electric vehicle control method, and an electric vehicle control system according to one embodiment of the present invention are configured to: obtain, based on operation information on release of an accelerator pedal of a vehicle and turn information on a turn of the vehicle, change rate information on a temporal change amount of a regenerative braking force with respect to an operation amount of the accelerator pedal; and output a regenerative braking control command for applying the regenerative braking force to a wheel based on the change rate information.

Electric vehicle control device, electric vehicle control method, and electric vehicle control system

Provided is a motor controller that can estimate the magnetic flux of a magnet without changing a current of an electric motor. A motor controllerincludes a current detecting unitthat detects a current of an electric motor, a current stability determining unitthat determines whether or not a current detected by the current detecting unitis stable, and a magnetic flux calculating unit (filtersto, a current conversion unit, a resistance calculating unit, a magnet magnetic flux estimating unit) that based on a determination made by the current stability determining unitas to current stability, calculates the magnetic flux of a magnet of the electric motor, according to a voltage equation in a rotating coordinate system, to output the calculated magnet flux. The motor controllerfurther includes a control voltage output unit (a map, voltage instruction unitsand, a first three-phase conversion unit) that outputs a control voltage to the electric motor, based on the magnetic flux of the magnet calculated by the magnetic flux calculating unit and on a torque instruction value.

Motor controller and motor controlling method

Provided is a motor control device that can reduce an error component resulting from braking or the like to bring an estimated motor speed closer to an actual motor speed, thereby improving the accuracy of control of a motor. The motor control device includes a controllerthat outputs a first torque instruction signal that is an instruction to specify a torque of an electric motor, and a damping control unit. The damping control unitincludes a first high-pass filterthat receives input of a motor speed signal indicating a speed of the electric motor, the first high-pass filteroutputting a first signal, a second high-pass filterthat receives input of an estimated motor speed signal obtained from the first torque instruction signal, the second high-pass filteroutputting a second signal, and a low-pass filterthat receives input of a motor speed deviation signal indicating a deviation between the first signal and the second signal, the low-pass filterobtaining a low-frequency component from the motor speed deviation signal and outputting the low-frequency component as a third signal.

Motor control device and motor controlling method

A control device, a control method, and a control system for an electric vehicle are configured to use both of one-pedal feedback control based on an acceleration and one-pedal feedback control based on a speed, to thereby decelerate a vehicle to stop.

Electric vehicle control device, control method, and control system

An object of the present invention is to provide a control apparatus for an electric vehicle capable of preventing the vehicle from being destabilized because a rear wheel is locked first or drivability from reducing because a front wheel is locked early. A control apparatus includes a regenerative braking force calculation portion configured to calculate a regenerative braking force to be generated on each of a front motor and a rear motor based on a request braking force requested to an electric vehicle, a power limit portion configured to reduce the regenerative braking force based on a power limit on a power source, and a frictional braking force output portion configured to output an instruction for generating a frictional braking force according to a regenerative braking force reduction amount, which is an amount of a reduction in the regenerative braking force by the power limit portion, to a brake apparatus.

Control apparatus for electric vehicle, control system for electric vehicle, and control method for electric vehicle

An apparatus includes a control apparatus for an electric vehicle. The control apparatus outputs an instruction to reduce the first regenerative braking force according to the physical amount regarding the stroke of the brake pedal to the electric motor. The control apparatus also outputs an instruction to add a braking force corresponding to a third regenerative braking force, which is a regenerative braking force corresponding to an amount of the reduction in the first regenerative braking force, to the brake actuation braking force when the signal regarding the pressing of the brake pedal is input after the signal regarding the return of the pressed accelerator pedal is input.

Provided is a control apparatus for an electric vehicle that can set a final torque instruction value without necessitating a repetition of a calculation. A control apparatus calculates a power limit value of each motor that is used when power is supplied to a plurality of motors, based on a power limit value of a power source, and calculates a torque instruction value of each motor based on the power limit value of each motor.

Provided is a control apparatus for an electric vehicle, which is capable of suppressing simultaneous slip of front and rear wheels. The control apparatus for an electric vehicle includes a control portion configured to control a front electric motor and a rear electric motor so that an achievement rate of a torque command with respect to a target torque in one motor of the front and rear electric motors is lower than the achievement rate in the other motor of the front and rear electric motors.

Provided is a control apparatus, a control method, and a control system for an electric vehicle that can prevent or reduce an unnecessary torque fluctuation on a wheel not targeted for slip control. A control apparatus for an electric vehicle limits a torque to be output to a non-target wheel according to a torque output to a target wheel after target wheel slip control is started, and updates a limit value of the torque to be output to the non-target wheel when a fluctuation range of the torque output to the target wheel falls within a predetermined range during the limitation.

Control apparatus, control method, and control system for electric vehicle

Provided is control apparatus for an electric vehicle, which is capable of suppressing simultaneous slip of front and rear wheels. The control apparatus for an electric vehicle controls a front electric motor and a rear electric motor so that a difference between a torque command value of the front electric motor and a torque command value of the rear electric motor is larger than a predetermined value.

The present invention provides a braking control apparatus capable of preventing or reducing a change in a deceleration of a vehicle. The braking control apparatus is configured to change a braking force to be generated by a frictional braking device so as to achieve a calculated target braking force, and generate a braking force corresponding to a difference between the braking force to be generated by the frictional braking device and the target braking force with use of an electric braking device, when a predetermined condition is satisfied.

Braking control apparatus

An object of the present invention is to provide a control apparatus for an electric vehicle that can prevent or reduce a shock when the vehicle starts running from a stopped state. According to one embodiment of the present invention, a first vibration damping control torque calculated by a first calculation method based on a signal of a wheel speed sensor, or a second vibration damping control torque calculated by a second calculation method based on a signal other than the signal of the wheel speed sensor is selectively output.

Control apparatus for electric vehicle, control system for electric vehicle, and method for controlling electric vehicle

Provided are a device for controlling an electric vehicle and a method of controlling an electric vehicle that are capable of appropriately suppressing a vibration. In the device for controlling an electric vehicle according to the present invention, when a motor configured to generate a torque for braking or driving a drive wheel is controlled based on a torque command value based on an accelerator operation or a brake operation by a driver and a vibration suppression control torque command value for suppressing a vibration component caused by a resonance of the vehicle, the vibration suppression control torque command value is restricted based on a state of the drive wheel during a travel.

Device and method for controlling electric vehicle with torque command and vibration suppression control

An object of the present invention is to provide a vehicle control apparatus capable of stabilizing a behavior of a vehicle when a regenerative braking force is generated. To achieve this object, a vehicle control apparatus according to one aspect of the present invention includes an electric motor configured to provide a regenerative braking force to left and right drive wheels that are one of front wheels and rear wheels, a friction braking device configured to provide a friction braking force to left and right trailer wheels that are the other of the front wheels and the rear wheels, and a behavior estimation unit configured to estimate a behavior of a vehicle. The vehicle control apparatus reduces the regenerative braking force and increases the friction braking force provided by the friction braking device, if the behavior estimation unit estimates a preset behavior when the regenerative braking force is generated.

Vehicle control apparatus and vehicle control method

Provided is a driving force control device capable of stabilizing a vehicle behavior when a driving torque of a drive wheel is controlled. When slip suppression control is carried out to decrease a driving torque of a drive source that is connected to the drive wheel of a vehicle via a speed reduction mechanism and a drive shaft, and is configured to generate a torque for braking or driving the drive wheel, to thereby suppress a slip state of the drive wheel, the driving torque of the drive source is controlled so that a slip ratio of the drive wheel is in an area of the slip ratio smaller than a slip ratio corresponding to a peak value of a road surface friction coefficient in a characteristic of the road surface friction coefficient with respect to the slip ratio.

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Kawasaki, Japan

Keisuke Suzuki