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: An active air flap control apparatus for a vehicle and an active air flap control method are provided. The active air flap control apparatus includes: a storing unit storing a plurality of critical values with respect to each of a cooling water temperature, a refrigerant pressure, and an intake air temperature; a first sensor measuring the cooling water temperature; a second sensor measuring the refrigerant pressure; a third sensor measuring the intake air temperature; and a controller combining the measured cooling water temperature, the measured refrigerant pressure, and the measured intake air temperature with each other. Based on the plurality critical values stored in the storing unit, the controller determines an opening rate of an active air flap.

Abstract: A control method of a driving mode of a hybrid vehicle and a control system for the method, the method including a coolant temperature-checking step of checking a coolant temperature by means of a controller, a first mode-performing step of increasing the coolant temperature by always operating an engine by means of the controller and of driving the vehicle in an HEV mode, a second mode-performing step of operating the engine by means of the controller and of driving the vehicle in the HEV mode, and a normal mode-performing step of driving the vehicle in the HEV mode by means of the controller.

Abstract: A system for correcting engine torque includes: a torque correction value generator generating a torque correction value for correcting output torque of an engine; a torque correction determination unit determining applicability of the generated torque correction value; and a torque applying unit determining a final engine output torque by applying the generated torque correction value to the output torque of the engine based on the determined applicability of the generated torque correction value.

Abstract: A charging control method and system for an electric vehicle are provided. The charging control method includes monitoring, by a controller, a state of an auxiliary battery including a state of charge (SOC), temperature, and charging current of the auxiliary battery. A charging mode of the electric vehicle is then determined based on the monitored state of the auxiliary battery. A charging voltage of the auxiliary battery is set based on the monitored SOC and temperature of the auxiliary battery and then the auxiliary battery is charged with the set charging voltage.

Abstract: A method for controlling a start time of an engine in a hybrid vehicle includes: generating, by a controller, an engine start command before executing start control of the engine in response to an acceleration signal output from an acceleration pedal sensor; determining, by the controller, a gradient of a road on which the hybrid vehicle travels; controlling, by the controller, a hybrid starter-generator to operate by controlling the engine to start depending on the engine start command when it is determined that the gradient of the road is present; and controlling, by the controller, electric power of the hybrid starter-generator to charge a battery which provides electric power to a motor. The controller controls an engine clutch so that the motor is not engaged with the engine.

Abstract: A system and method for charging a plug-in hybrid vehicle can improve the on-board charging efficiency of the plug-in hybrid vehicle by adjusting a frequency of operation of a cooler when cooling an on-board charger (OBC) by circulating coolant when the temperature of the OBC rises while a high-voltage battery is being charged. The operations of a water pump and a radiator fan are controlled by determining whether the voltage of the high-voltage battery is within or out of a reference voltage range in which the on-board charging of the high-voltage battery is performed. This consequently prevents power from being unnecessarily consumed by operation of the cooler, such that the efficiency of charging is improved and the OBC is properly cooled.

Abstract: An engine operation control system and method of an eco-friendly vehicle are provided to achieve optimal engine operating efficiency by changing a region for using an engine operating point based on a battery state of charge (SOC) region and a driver requirement torque. The system and method satisfy a driver requirement torque and achieve defense of battery state of charge (SOC) and optimal engine operating efficiency by changing an engine operating point based on a battery state of charge (SOC) and a driver requirement torque to an engine operating point where a battery discharge amount is minimized and a battery charging amount is maximized.

Abstract: A motor speed control method and system for improving the performance of a running resistance evaluation of a hybrid electric vehicle are provided. The method includes determining whether a vehicle satisfies a running resistance evaluation start condition. When the vehicle satisfies the running resistance evaluation start condition, the speed of a motor is adjusted, which adjusts an input speed of a transmission to be equal to an output speed of the transmission. A speed adjustment of the motor is then completed using the speed of the motor and the output speed of the transmission.

Abstract: A charging control method and system for an electric vehicle are provided. The charging control method includes monitoring, by a controller, a state of an auxiliary battery including a state of charge (SOC), temperature, and charging current of the auxiliary battery. A charging mode of the electric vehicle is then determined based on the monitored state of the auxiliary battery. A charging voltage of the auxiliary battery is set based on the monitored SOC and temperature of the auxiliary battery and then the auxiliary battery is charged with the set charging voltage.

Abstract: An apparatus and a method for controlling a driving mode of an HEV are provided. The apparatus releases an HEV mode at an appropriate time before forcibly releasing an engine clutch even when an accelerator pedal is engaged while driving the vehicle on an uphill road in the HEV mode to reduce a shock caused when the engine clutch is forcibly disengaged and improve riding comfort and drivability. The method includes determining whether the vehicle is driven on an uphill road from gradient information of a current road while the vehicle is driven in a HEV mode and determining a clutch engagement impossible speed corresponding to the gradient of the current road when the vehicle is driven on the uphill road. The engine clutch is disengaged to release the HEV mode when the speed of the motor is equal to or less than the determined clutch engagement impossible speed.

Abstract: An engine operation control system and method of an eco-friendly vehicle are provided to achieve optimal engine operating efficiency by changing a region for using an engine operating point based on a battery state of charge (SOC) region and a driver requirement torque. The system and method satisfy a driver requirement torque and achieve defense of battery state of charge (SOC) and optimal engine operating efficiency by changing an engine operating point based on a battery state of charge (SOC) and a driver requirement torque to an engine operating point where a battery discharge amount is minimized and a battery charging amount is maximized.

Abstract: A method and a system for displaying efficiency of regenerative braking for an environmentally-friendly vehicle to better educate drivers in regards to their braking habits and hopefully teach them how to improve the fuel efficiency of the vehicle through adjustment of their braking habits while improving the quality of a vehicle by displaying the regenerative braking efficiency in comparison to a total amount of braking during the braking of the environmentally-friendly vehicle on a cluster. In particular, a total amount of braking while the vehicle is braking, and a ratio of the amount of regenerative braking included in the total amount of braking is calculated by a controller. Then the controller determines whether the vehicle is stopped due to braking. Once the vehicle has stopped due to braking, the calculated ratio of the amount of regenerative braking is displayed on a cluster in the vehicle.

Abstract: A method for controlling a start time of an engine in a hybrid vehicle includes: generating, by a controller, an engine start command before executing start control of the engine in response to an acceleration signal output from an acceleration pedal sensor; determining, by the controller, a gradient of a road on which the hybrid vehicle travels; controlling, by the controller, a hybrid starter-generator to operate by controlling the engine to start depending on the engine start command when it is determined that the gradient of the road is present; and controlling, by the controller, electric power of the hybrid starter-generator to charge a battery which provides electric power to a motor. The controller controls an engine clutch so that the motor is not engaged with the engine.

Abstract: A motor speed control method and system for improving the performance of a running resistance evaluation of a hybrid electric vehicle are provided. The method includes determining whether a vehicle satisfies a running resistance evaluation start condition. When the vehicle satisfies the running resistance evaluation start condition, the speed of a motor is adjusted, which adjusts an input speed of a transmission to be equal to an output speed of the transmission. A speed adjustment of the motor is then completed using the speed of the motor and the output speed of the transmission.

Abstract: A method and system for setting a learning period of an engine clutch of a hybrid vehicle are provided. The engine clutch controls a connection of power between an engine and a motor of a hybrid vehicle, and the method includes: detecting and accumulating a launch slip time of the engine clutch; detecting and accumulating a launch slip entry number of times of the engine clutch; detecting and accumulating a time in which a temperature of the engine clutch exceeds a setting temperature; detecting and accumulating a number of times in which the temperature of the engine clutch exceeds the setting temperature; and setting a learning period of the engine clutch based on at least one of the launch slip accumulation time, the launch slip entry accumulation number of times, the setting temperature exceeding accumulation time, and the setting temperature exceeding accumulation number of times.

Abstract: An apparatus and a method for controlling a full load mode of a hybrid electric vehicle utilizes an engine and a motor as power sources, and the method includes steps of: calculating a demand torque when the demand torque is generated; determining a current driving mode of the hybrid electric vehicle; calculating a possible assist torque of the motor according to a current driving mode of the hybrid electric vehicle; calculating a part load maximum output torque of the engine; and determining whether to enter the full load mode based on the possible assist torque of the motor and the part load maximum output torque of the engine.

Abstract: A method and a system for displaying efficiency of regenerative braking for an environmentally-friendly vehicle to better educate drivers in regards to their braking habits and hopefully teach them how to improve the fuel efficiency of the vehicle through adjustment of their braking habits while improving the quality of a vehicle by displaying the regenerative braking efficiency in comparison to a total amount of braking during the braking of the environmentally-friendly vehicle on a cluster. In particular, a total amount of braking while the vehicle is braking, and a ratio of the amount of regenerative braking included in the total amount of braking is calculated by a controller. Then the controller determines whether the vehicle is stopped due to braking. Once the vehicle has stopped due to braking, the calculated ratio of the amount of regenerative braking is displayed on a cluster in the vehicle.

Abstract: A method and system for setting a learning period of an engine clutch of a hybrid vehicle are provided. The engine clutch controls a connection of power between an engine and a motor of a hybrid vehicle, and the method includes: detecting and accumulating a launch slip time of the engine clutch; detecting and accumulating a launch slip entry number of times of the engine clutch; detecting and accumulating a time in which a temperature of the engine clutch exceeds a setting temperature; detecting and accumulating a number of times in which the temperature of the engine clutch exceeds the setting temperature; and setting a learning period of the engine clutch based on at least one of the launch slip accumulation time, the launch slip entry accumulation number of times, the setting temperature exceeding accumulation time, and the setting temperature exceeding accumulation number of times.

Abstract: The present invention relates to an electric-field drive display device. According to one embodiment of the present invention, the electric-field drive display device comprises: a first substrate; a first electrode which is formed on the first substrate; a second electrode which is formed on the first substrate and is disposed in parallel with the first electrode; a drive partition wall which is formed on the first electrode and the second electrode and has a plurality of opening and closing holes; and a plurality of drive bodies which are disposed inside each of the opening and closing holes. Consequently, the electric-field drive display device according to one embodiment of the present invention can adjust the amount of light transmitted and so display the desired image by adjusting the positions of the drive bodies in the horizontal direction through the use of electrical force.