Abstract: An apparatus and a method for controlling a coasting operation in a hybrid vehicle are provided. The apparatus includes: a coasting operation control mode entrance time point determination unit to determine a time point at which a subject vehicle enters a coasting operation control mode; a target vehicle speed reach time point calculation unit to calculate a target vehicle speed of the subject vehicle and a time point, at which the subject vehicle reaches the target vehicle speed, when the subject vehicle enters the coasting operation control mode; and a creep torque variation control unit to control creep torque of the subject vehicle using a difference between the target vehicle speed and a present vehicle speed of the subject vehicle.

Abstract: A regenerative braking control apparatus of a vehicle may include: a drive motor; a battery for providing driving voltage to the drive motor; a data detector for detecting a driving state information of the vehicle; and a vehicle controller generating a total braking amount based on the driving state information. In particular, the vehicle controller generates a regenerative braking possible amount by using a generatable power of the drive motor and a chargeable power of the battery, performs a regenerative braking when the regenerative braking possible amount is greater than the total braking amount, and also prepares a hydraulic pressure braking based on the regenerative braking possible amount and a regenerative braking amount based on the regenerative braking.

Abstract: An apparatus for controlling a torque intervention of a hybrid vehicle includes a driving information detector for detecting a torque intervention request of the hybrid vehicle, and a controller for deriving a target motor torque and a target engine torque depending on a required torque variation when the torque intervention is requested, the target motor torque being derived so that a high voltage battery does not deviate from a state of charge (SOC) charging and discharging limit, the target motor torque limiting the target engine torque to be equal to or less than a target engine torque before the intervention request to obtain a final engine torque, and the target motor torque correcting the target motor torque to a final motor torque depending on the final engine torque.

Abstract: A system and method of controlling engine clutch engagement during TCS operation of a hybrid vehicle are provided. The method includes determining whether a TCS is operating and upon determining that the TCS is operating, determining a compensation value for early engagement of an engine clutch during the TCS operation based on a difference between a front wheel speed and a rear wheel speed and a slip amount of front wheels. Additionally, the method includes determining whether engagement of the engine clutch is capable of being started based on the compensation value and starting the engine clutch engagement. Since the engagement of the engine clutch is controlled based on the speed of non-drive wheels during TCS operation, the engagement stability of the engine clutch is improved and the amount of time required to engage the engine clutch is decreased.

Abstract: A method of controlling an engine driving force during operation of a traction control system (TCS) of a hybrid vehicle includes: calculating a driver-demanded torque based on a detection signal of an accelerator position sensor (APS), determining whether the TCS is operating, and, upon determining that the TCS is operating, determining engine driving force based on a TCS-demanded torque according to operation of the TCS. Accordingly, the engine driving force (i.e., an engine operating point) is determined based on the TCS-demanded torque requested in order to reduce the torque of the hybrid vehicle during the TCS operation, so as to improve fuel efficiency by reducing fuel consumption during the TCS operation.

Abstract: A method for controlling torque reduction of a hybrid vehicle includes: determining a discharging torque control factor of a motor and a charging torque control factor of the motor based on a current state of charge of a battery that supplies electric power to the motor and a threshold state of charge of the battery; calculating a torque of the motor corresponding to driving torque reduction request of a traction control system (TCS) based on a discharging limit torque of the motor that the discharging torque control factor is reflected in and a charging limit torque of the motor that the charging torque control factor is reflected in; and calculating a torque of the engine corresponding to the driving torque reduction request based on the calculated torque of the motor and a request torque of the traction control system.

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 method for controlling torque reduction of a hybrid electric vehicle including a motor and an engine as a power source includes: calculating a total request amount of torque reduction when a torque reduction is requested; calculating a driving torque contribution of the engine and a driving torque contribution of the motor when the engine is turned on; dividing the total request amount of torque reduction into an amount of engine torque reduction and an amount of motor torque reduction based on the driving torque contribution of the engine and the driving torque contribution of the motor; determining an engine torque command and a motor torque command according to the amount of engine torque reduction and the amount of motor torque reduction; and performing torque reduction according to the engine torque command and the motor torque command.

Abstract: A method of controlling torque intervention of a hybrid electric vehicle includes: receiving at least one torque intervention request; determining, by a control unit, a gear shift intervention requested quantity requested for limiting a driving torque of the vehicle during a gear shift and a brake intervention requested quantity requested for limiting the driving torque of the vehicle during a braking operation in response to receiving the at least one torque intervention request; generating, by the control unit, a combined intervention requested quantity based on the gear shift intervention requested quantity and the brake intervention requested quantity; and determining, by the control unit, a type of current intervention based on the combined intervention requested quantity real-time.

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 method for controlling torque reduction of a hybrid electric vehicle including a motor and an engine as a power source includes: determining whether a request for a driving torque limit by a traction control system (TCS) is generated; calculating a motor torque command when the request for the driving torque limit by the TCS is generated; calculating an engine torque command based on the calculated motor torque command; calculating an available amount of charging of the motor according to a state of charge (SOC) of a battery of the hybrid electric vehicle; and determining a final motor torque command and a final engine torque command based on the calculated available amount of charging of the motor.

Abstract: A method for releasing creep torque control of a vehicle before a stop includes a step of when creep torque is controlled for a shift before a stop of the vehicle, creep torque control is released in consideration of a current shift gear position if an actual creep torque value controlled during a shift becomes equal to a target creep torque value.

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 request for a driving torque limit by a traction control system (TCS) is generated; calculating a motor torque command when the request for the driving torque limit by the TCS is generated; calculating an engine torque command based on the calculated motor torque command; calculating an available amount of charging of the motor according to a state of charge (SOC) of a battery of the hybrid electric vehicle; and determining a final motor torque command and a final engine torque command based on the calculated available amount of charging of the motor.

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 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 for controlling torque reduction of a hybrid electric vehicle including a motor and an engine as a power source includes: calculating a total request amount of torque reduction when a torque reduction is requested; calculating a driving torque contribution of the engine and a driving torque contribution of the motor when the engine is turned on; dividing the total request amount of torque reduction into an amount of engine torque reduction and an amount of motor torque reduction based on the driving torque contribution of the engine and the driving torque contribution of the motor; determining an engine torque command and a motor torque command according to the amount of engine torque reduction and the amount of motor torque reduction; and performing torque reduction according to the engine torque command and the motor torque command.

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 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.