Hyundai Motor Company

Kia Motors Corporation

Kia Corporation

Hyundai Motor Corporation

Kia Motors Cornoration

Ji Won Oh

Jeong Soo Eo

Sung Jae Kim

Young Joon Chang

Dong Chul Park

Tae Kun Yun

Lee Hyoung Cho

Youn Kwang Jung

Sang Joon Kim

Jin Sung Lee

Ba Ro Hyun

Ki Chang Kim

Ho Wook Lee

Seong Ik Park

Kyoung Jin Chang

Se Hoon Park

Dong Pil Yoon

Jong Kil Baek

Ki Mo Sohn

Youn Jae Jung

A method for controlling regenerative braking includes determining a natural frequency of vehicle suspension pitch motion according to characteristics of a suspension device of vehicle; providing a filter of removing or passing a natural frequency component of the vehicle suspension pitch motion to a control unit; determining, by the control unit, a required regenerative braking force command based on vehicle driving information collected during driving; determining, by the control unit, a final front wheel regenerative braking force command and a final rear wheel regenerative braking force command through a filtering process using the filter from the determined required regenerative braking force command; and controlling, by the control unit, a regenerative braking force applied to a front wheel and a rear wheel by a driving device for driving the vehicle according to the determined final front wheel regenerative braking force command and final rear wheel regenerative braking force command.

Method for controlling regenerative braking of vehicle

A torque control method in a drive system of an electric vehicle includes determining, by a controller, a torque control mode corresponding to a current vehicle driving state among a plurality of preset torque control modes; and transitioning, by the controller, from a current torque control mode to the determined torque control mode, in which the transitioning to the determined torque control mode comprises performing, by the controller, limitation to a torque slope using a torque command at an immediately previous control cycle with respect to a front-wheel torque command that is a command for a front-wheel motor and a rear-wheel torque command that is a command for a rear-wheel motor, in a transient section where transition between torque control modes occurs.

Torque control method in drive system of electric vehicle

A method for controlling regenerative braking includes setting a filter simulation map for simulating a filter of removing or passing a natural frequency component of vehicle suspension pitch motion according to suspension device characteristics of the vehicle and providing the filter simulation map to a controller of the vehicle, determining, by the controller, a required regenerative braking force command based on vehicle driving information collected during driving of the vehicle, determining a final front wheel regenerative braking force command and a final rear wheel regenerative braking force command from the determined required regenerative braking force command through a limit value application process using a limit value determined in the filter simulation map, and controlling a regenerative braking force applied to front and rear wheels as a force for decelerating the vehicle by a driving device for driving the vehicle according to the determined final front and rear wheel regenerative braking force commands.

An apparatus and a method estimate backlash and compliance. The apparatus and the method are configured to distinguish and determine the backlash and the compliance occurring in a vehicle driving system. The method includes providing information related to a driving system model between a motor and a driving wheel for driving a vehicle to a controller, determining a compliance speed, by the controller, by using the information related to the driving system model based on vehicle driving information acquired by a driving information detector while the vehicle is driven, and determining a backlash speed, by the controller, by subtracting the determined compliance speed from an overall speed difference that is a difference between a motor speed and a driving wheel speed. The apparatus is configured to perform the method.

Apparatus and method for separately estimating backlash and compliance of vehicle driving system

In a torque control method for a drive system of an electric vehicle configured for generating torque by evading a backlash band to prevent occurrence of backlash in the drive system, torque control modes include a contra-directional distribution mode in an acceleration direction in which a front-wheel torque command is determined to be a maximum front-wheel torque threshold value set as a negative (−) torque value in a regenerative direction and a rear-wheel torque command is determined to be a positive (+) torque value in a driving direction and a contra-directional distribution mode in a regenerative direction in which the rear-wheel torque command is determined to be a minimum rear-wheel torque threshold value set as a positive (+) torque value in the driving direction and the front-wheel torque command is determined to be a negative (−) torque value in the regenerative direction thereof.

Torque control method for drive system of electric vehicle

A method of implementing a virtual jet propulsion mode in an electric vehicle, includes collecting, by a controller of the vehicle, vehicle driving information while the vehicle is running in a state where the virtual jet propulsion mode including a plurality of virtual modes for mimicking an operating state and a driving feeling of a jet engine is set in the controller of the vehicle, selecting, by the controller, a virtual mode corresponding to a current vehicle driving state from among the virtual modes of the virtual jet propulsion mode based on the collected vehicle driving information, determining, by the controller, a motor torque command corresponding to the collected vehicle driving information and a currently selected virtual mode, and controlling, by the controller, an operation of a motor that drives the vehicle according to the motor torque command.

Method of implementing virtual jet propulsion mode in electric vehicle

A method of virtualizing characteristics of an internal combustion engine vehicle in an electric vehicle, the method includes: determining, by a controller, a current input torque applied to a powertrain from a motor that makes a vehicle move, determining, by the controller, tooth surface pressures of gears in the powertrain between the motor and driving wheels from the determined current input torque, generating, by the controller, a virtual effect signal for generating a virtual effect that simulates powertrain characteristics of an internal combustion engine vehicle based on the determined tooth surface pressures of the gears in the powertrain, and generating, by the controller, the virtual effect that simulates the powertrain characteristics of the internal combustion engine vehicle by controlling operation of a virtual effect generation device that generates the virtual effect according to the generated virtual effect signal.

Method of virtualizing characteristics of internal combustion engine vehicle in electric vehicle

A method of controlling a torque of a drive system of an electric vehicle, includes determining, by a controller, a total torque command based on required torque according to a vehicle driving state while driving of the vehicle, determining whether a backlash band evasion mode is in an ON state or an OFF state, front wheel torque control or rear wheel torque control for evading a backlash band being performed in the mode, determining whether transition of the vehicle driving state to the ON state of the backlash band evasion mode is allowed when the backlash band evasion mode is in the OFF state, and controlling the backlash band evasion mode using a front wheel torque command and a rear wheel torque command determined from the total torque command in the ON state of the backlash band evasion mode when the transition is allowed.

Method of controlling torque of drive system of electric vehicle

A method for controlling driving of a vehicle, can control driving of a vehicle so that handling responsiveness may be differentiated in correspondence to a vehicle driving mode, steering input information by a driver, etc. The method for controlling driving of a vehicle distributes a request torque command into a left wheel torque command and a right wheel torque command, corrects the distributed torque commands using a differential control amount according to a vehicle driving mode and steering input information by a driver, and then performs torque command follow control for controlling torque which is applied to the wheels based on the post-correction torque commands.

Method for controlling driving of vehicle

A method of controlling torque of a drive system of an electric vehicle includes determining, by a controller, required torque according to a vehicle driving state while the vehicle is driven, and determining a total torque command based on the determined required torque, and performing, by the controller, a front wheel and rear wheel torque distribution process on the total torque command, so that a front wheel torque command and a rear wheel torque command following the total torque command are determined.

A method for determining a driving state of a vehicle includes determining a torque command of a vehicle drive apparatus based on vehicle driving information collected during driving of the vehicle, determining an acceleration error defined as a difference between a reference longitudinal acceleration of the vehicle interlocked with the torque command and a measured longitudinal acceleration of the vehicle, determining an acceleration disturbance rate defined as a difference between an actual rotational acceleration of the vehicle drive and a reference drive apparatus rotational acceleration interlocked with the torque command based on the determined torque command, integrating the determined acceleration disturbance rate to determine the acceleration disturbance, and determining a current vehicle driving state of the vehicle based on the determined acceleration error, the determined acceleration disturbance rate and the acceleration disturbance.

Method for determining driving status of vehicle

A method of controlling driving force of a vehicle, includes providing a first filter for removing or reducing a natural frequency component of the vehicle suspension pitch motion, and a second filter for extracting or increasing the natural frequency component of the vehicle suspension pitch motion to a controller of the vehicle, determining a required driving force command based on vehicle driving information collected during driving of the vehicle, determining a driving force command after filter application through a processing process by the first filter taking the determined required driving force command as input thereof, determining a driving force correction amount through a processing process by the second filter taking feedback driving force as input thereof, and correcting the driving force command after filter application using the driving force correction amount and controlling driving force applied to a driving wheel of the vehicle by a driving device of the vehicle using the driving force command after the correction.

Method for controlling driving force of vehicle

A method for controlling the traveling of a vehicle includes determining, by a control unit, a basic torque command based on vehicle operating information collected during traveling of a vehicle; obtaining, by the control unit, vertical load information of a left wheel and a right wheel of the vehicle in real time during traveling of the vehicle based on information collected in the vehicle; determining, by the control unit, a partial braking amount from the determined real-time basic torque command and the obtained real-time vertical load information; and performing, by the control unit, a partial braking control controlled by an inner wheel braking device so that a braking force corresponding to the partial braking amount is applied to a turning inner wheel among the left wheel and the right wheel.

Method for controlling traveling of vehicle

A method of controlling driving of a vehicle which performs torque command tracking control includes distributing a required torque command to a left wheel torque command and a right wheel torque command, correcting each of the distributed torque commands using the differential control amount according to a vehicle driving mode and steering input information, and then controlling torque applied to the wheel based on the torque command after correction.

Method of controlling driving of vehicle

method of controlling torque of a vehicle driving device is provided. The method includes estimating speed of a driving system of a vehicle from vehicle driving information collected from the vehicle and calculating speed difference between actually measured speed of the driving system and the estimated speed of the driving system. A nominal rate limit value is determined according to the vehicle driving information and a required real-time rate correction amount is determined according to the calculated speed difference. A torque command variation is determined based on the determined nominal rate limit value and the determined required real-time rate correction amount. A torque command after correction in a previous control period is corrected by the determined torque command variation to determine a torque command after correction in a current control period.

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Gyeonggi-do, South Korea

Ji Won Oh