Abstract: A device and method are provided for controlling battery charge and discharge quantity in an eco-friendly vehicle equipped with a high voltage battery to optimize the battery charge and discharge quantity. More specifically, the device and method prevent limitations of battery low-voltage/overvoltage due to excessive use of electrical energy stored in a battery using battery state of charge (SOC), battery temperature information, and battery voltage information. Additionally, the fuel efficiency and the power performance are improved by securing an additional motor output using existing hardware without addition of parts compared to a related art.

Abstract: A method for determining an amount of regenerative braking includes: determining a possible amount of regenerative braking at a time of braking a vehicle; distributing a first amount of regenerative braking up to the possible amount of regenerative braking as the amount of regenerative braking; distributing a second amount of regenerative braking remaining from the possible amount of regenerative braking as an amount of hydraulic braking; and performing, first, regenerative braking by issuing a motor torque instruction according to the possible amount of regenerative braking and, second, friction braking using the amount of hydraulic braking.

Abstract: A system and a method for estimating regenerative braking of a vehicle are provided to correct allowable regenerative braking and braking linearity by estimating allowable regenerative braking in consideration of a current status of a battery and a motor. The system for estimating allowable regenerative braking for a vehicle, includes: a motor control unit to provide a charging power limit of a motor as a first input; a battery management system to provide a charging power limit of a battery as a second input; an active hydraulic brake to input allowable regenerative braking as a third input; and a hydraulic control unit to estimate final allowable regenerative braking using the charging power limit of the battery, the charging power limit of the motor, and the allowable regenerative braking as the inputs.

Abstract: A method for controlling torque reduction of a hybrid electric vehicle including a motor and an engine as a power source includes: determining whether a traction control system (TCS) is operating; calculating a demand torque of the TCS when the TCS is operating; determining an engine operating point according to the demand torque of the TCS; maintaining an engine torque according to the engine operating point; comparing a difference between the demand torque of the TCS and the engine torque according to the engine operating point with a charging limit torque of the motor; and performing torque reduction using a motor torque and the engine torque based on a result of the comparison.

Abstract: A method and an apparatus for controlling regenerative braking of a hybrid electric vehicle are provided and that adjust a regenerative braking torque by classifying as at least two or more regenerative braking modes and applying different regenerative braking slopes to each mode. The apparatus includes a motor controller that is configured to adjust a driving torque of a motor and a brake controller that is configured to adjust hydraulic pressure supplied to a brake cylinder of a wheel by calculating a braking torque. A hybrid controller is configured to adjust a regenerative braking torque by classifying as at least two or more regenerative braking modes and applying different regenerative braking slopes based on each mode.

Abstract: A shift control system and method of a hybrid vehicle are provided and controlled by dualizing a brake shift pattern based on whether an engine clutch release is possible when a hybrid vehicle brake is engaged. The system includes a hybrid controller that is configured to detect whether engine clutch release is possible, based on battery state information and input data from a operation. In addition, a shift controller is configured to execute a gear shift by a brake shift pattern based on whether the engine clutch release is possible.

Abstract: A method for controlling a brake of an electric vehicle provided with a smart cruise control system may include detecting, by a driving information detector, a brake demand of a driver when braking control due to a smart cruise controller is performed, stopping, by a vehicle controller, the braking control due to the smart cruise controller and maintaining a braking amount caused by the smart cruise controller when the brake demand of the driver is detected, determining, by the vehicle controller, a demand braking amount according to the brake demand of the driver, and performing, by the vehicle controller, braking control by using the maintained braking amount caused by the smart cruise controller and the demand braking amount.

Abstract: A system for controlling torque for a hybrid vehicle includes a power source having an engine and a motor. An engine clutch is provided between the engine and the motor. A driving information detector detects demand torque for driving. A traction controller controls oil pressure supplied into a brake to prevent a wheel slip and request torque reduction control from a vehicle controller when the wheel slip is detected. A vehicle controller controls engagement of the engine clutch for driving in a hybrid electric vehicle (HEV) mode, wherein the vehicle controller determines output torques of the engine and the motor to perform torque reduction control according to the torque reduction control, and when the request for the torque reduction control is released, the vehicle controller sets a gradient for torque restoration of the engine and the motor and applies the gradient to follow the demand torque for driving.

Abstract: A shift control system and method that determine whether an ABS is operating in a running vehicle to operate a transmission of the vehicle are provided. The system determines whether the vehicle can be shifted to a neutral stage (N) based on vehicle conditions. A shift control signal is then generated and transmitted to a transmission to execute a shift of the vehicle to the stage N.

Abstract: A method for calculating an amount of regenerative braking for an environmentally-friendly vehicle includes: determining a presence of regenerative braking; determining whether charging is limited due to a high voltage component including a battery and a drive motor of the environmentally-friendly vehicle at the time of the regenerative braking for the environmentally-friendly vehicle; calculating a base speed (base rpm) of a driving motor depending on a charging limit in the charging limit state at the time of the regenerative braking for the environmentally-friendly vehicle and dividing a steady torque area and a steady power area based on the calculated base speed; and determining whether an operating mode of the driving motor is a steady power mode, a steady torque mode, or a conversion mode depending on the divided steady torque area or steady torque area and calculating the amount of regenerative braking based on the determined result.

Abstract: A method for determining an amount of regenerative braking includes: determining a possible amount of regenerative braking at a time of braking a vehicle; distributing a first amount of regenerative braking up to the possible amount of regenerative braking as the amount of regenerative braking; distributing a second amount of regenerative braking remaining from the possible amount of regenerative braking as an amount of hydraulic braking; and performing, first, regenerative braking by issuing a motor torque instruction according to the possible amount of regenerative braking and, second, friction braking using the amount of hydraulic braking.

Abstract: A braking control method of an eco-friendly vehicle includes calculating, if a braking manipulation performed by a driver is sensed, a motor torque command according to a regenerative braking permissible amount. If it is determined that a motor has been normally driven, a regenerative braking execution amount is calculated from the motor torque command. Motor control for regenerative braking is performed according to the motor torque command. A friction braking amount satisfying the total braking amount is calculated from the regenerative braking execution amount according to the braking manipulation performed by the driver, thereby controlling friction braking to generate braking power corresponding to the friction braking amount.

Abstract: A system and method for controlling a regenerative braking are provided. The system includes a driving information detector that is configured to detect whether a brake pedal is operated and detect shift information. In addition, a hybrid control unit is configured to fix the regenerative braking during actual shifting based on the shift information and is configured to use a required braking force when the actual shifting is not performed to calculate the regenerative braking.

Abstract: A braking control method of an eco-friendly vehicle includes: determining a total braking amount according to a driver braking input; determining a regenerative braking permissible amount from the total braking amount through distribution of braking power; determining a regenerative braking torque according to the regenerative braking permissible amount; determining a reference regenerative braking execution amount to which a transmission state is reflected from the regenerative braking torque; determining a final regenerative braking execution amount by correcting the reference regenerative braking execution amount according to environmental information; determining a friction braking amount from the total braking amount and the final regenerative braking execution amount; and performing friction braking for controlling a friction braking device based on the friction braking amount.

Abstract: A system for controlling torque controls torque during traction control of a hybrid vehicle which uses a motor and an engine as power sources. The system for controlling torque may include: a traction control system (TCS) that detects wheel slip of a front wheel or a rear wheel when the hybrid vehicle is accelerated and requests an intervention torque; a battery sensor that measures state of charge (SOC) in real time; and a vehicle controller that determines a set value of a limit torque according to the SOC transmitted from the battery sensor when requesting the intervention torque and decreases a motor torque according to the set value of the limit torque when the SOC is lower than a predetermined threshold, and then increases an engine torque by as much as the motor torque is decreased.

Abstract: An apparatus and a method for controlling a creep torque of a hybrid electric vehicle that outputs the creep torque to improve shift feel and fuel consumption of the hybrid electric vehicle, may include the method for controlling a creep torque of a hybrid electric vehicle that may include detecting data of the hybrid electric vehicle for controlling the creep torque, determining whether a vehicle speed is greater than or equal to a predetermined speed and the hybrid electric vehicle is shifting from a current shift stage to 1 stage when the current shift stage is 3 stage or 2 stage, applying a creep torque factor depending on a shift stage and a brake amount when the hybrid electric vehicle is shifting from 3 stage or 2 stage to 1 stage, and controlling a motor to output the creep torque to which the creep torque factor is applied.

Abstract: An apparatus and a method for controlling a creep torque of a hybrid electric vehicle that outputs the creep torque to improve shift feel and fuel consumption of the hybrid electric vehicle, may include the method for controlling a creep torque of a hybrid electric vehicle that may include detecting data of the hybrid electric vehicle for controlling the creep torque, determining whether a vehicle speed is greater than or equal to a predetermined speed and the hybrid electric vehicle is shifting from a current shift stage to 1 stage when the current shift stage is 3 stage or 2 stage, applying a creep torque factor depending on a shift stage and a brake amount when the hybrid electric vehicle is shifting from 3 stage or 2 stage to 1 stage, and controlling a motor to output the creep torque to which the creep torque factor is applied.

Abstract: A shift control system and method of a hybrid vehicle are provided and controlled by dualizing a brake shift pattern based on whether an engine clutch release is possible when a hybrid vehicle brake is engaged. The system includes a hybrid controller that is configured to detect whether engine clutch release is possible, based on battery state information and input data from a operation. In addition, a shift controller is configured to execute a gear shift by a brake shift pattern based on whether the engine clutch release is possible.

Abstract: A method for calculating an amount of regenerative braking for an environmentally-friendly vehicle includes: determining a presence of regenerative braking; determining whether charging is limited due to a high voltage component including a battery and a drive motor of the environmentally-friendly vehicle at the time of the regenerative braking for the environmentally-friendly vehicle; calculating a base speed (base rpm) of a driving motor depending on a charging limit in the charging limit state at the time of the regenerative braking for the environmentally-friendly vehicle and dividing a steady torque area and a steady power area based on the calculated base speed; and determining whether an operating mode of the driving motor is a steady power mode, a steady torque mode, or a conversion mode depending on the divided steady torque area or steady torque area and calculating the amount of regenerative braking based on the determined result.

Abstract: A method and an apparatus for controlling regenerative braking of a hybrid electric vehicle are provided and that adjust a regenerative braking torque by classifying as at least two or more regenerative braking modes and applying different regenerative braking slopes to each mode. The apparatus includes a motor controller that is configured to adjust a driving torque of a motor and a brake controller that is configured to adjust hydraulic pressure supplied to a brake cylinder of a wheel by calculating a braking torque. A hybrid controller is configured to adjust a regenerative braking torque by classifying as at least two or more regenerative braking modes and applying different regenerative braking slopes based on each mode.