Abstract: An apparatus and a method for controlling a hybrid vehicle are provided. The apparatus includes an engine that generates power by combusting fuel and a drive motor that supplements the power from the engine and operates selectively as an electric generator to produce electrical energy. A clutch is disposed between the engine and the drive motor and a battery supplies electrical energy to the drive motor and is charged with the electrical energy produced by the drive motor. Multiple electric superchargers are installed in multiple intake lines through which outside air to be supplied into a combustion chamber of the engine flows. A controller determines an operation mode of the multiple electric superchargers based on required power of a driver and a state of charge (SOC) of the battery and adjusts the power output from the engine and the power output from the drive motor.

Abstract: An apparatus and method for controlling gear shift of a hybrid vehicle prevent frequent gear shift by adjusting output of a driving motor or a gear shift time point of a transmission based on road condition or vehicle state while the hybrid vehicle is driven in a specific road condition or a specific vehicle state in a HEV mode. The apparatus includes a driving state detector that detects a road condition and a vehicle state and a controller that receives the road condition and the vehicle state from the driving state detector to differentiate and select a hybrid electric vehicle (HEV) mode into a normal mode and a compensation mode. The controller adjusts the output of a driving motor or a gear shift time point of a transmission according to different conditions from the driving state detector in the compensation mode.

Abstract: A method for controlling a hybrid vehicle having a motor and an engine includes: calculating a first startup reference value of the engine on the basis of requested power of the hybrid vehicle; measuring a current speed of the hybrid vehicle, and predicting a future speed of the hybrid vehicle; generating a compensation value needed to compensate for the first startup reference value of the engine on the basis of a difference between the current speed and the future speed of the hybrid vehicle; acquiring a second startup reference value of the engine by compensating for the first startup reference value on the basis of the compensation value; and controlling a startup operation of the engine according to the second startup reference value acquired through compensation.

Abstract: A vehicle includes a motor; a transmission; a battery; a mode input device for receiving a driving mode; a control information input device for receiving regenerative braking control information or gearshift level control information; and a controller configured to control at least one of braking torque of the motor and gearshift level of the transmission to control an amount of regenerative braking during regenerative braking by recognizing a signal received from the control information input device as a signal corresponding to the regenerative braking control information when the driving mode input to the mode input device is a first mode, and control the transmission to control the gearshift level of the transmission by recognizing a signal received from the control information input device as a signal corresponding to the gearshift level control information when the driving mode input to the mode input device is a second mode.

Abstract: An engine idle operation control method and system are provided to improve the fuel efficiency of a vehicle through maintenance of efficient battery SOC and charge control during the engine-on for heating of a vehicle. The method includes receiving an engine-on request for heating of the vehicle and determining a road condition. A target charge power is determined and set as a value corresponding to the road condition and battery state information. A basic idle RPM set as a value corresponding to the road condition, the target charge power, and the outdoor temperature is determined. A compensation RPM and a target idle RPM are determined by compensating for the basic idle RPM by the compensation RPM to adjust the engine idle driving into the determined target idle RPM during the heating of the vehicle.

Abstract: A method for controlling a hybrid vehicle having a motor and an engine includes: calculating a first startup reference value of the engine on the basis of requested power of the hybrid vehicle; measuring a current speed of the hybrid vehicle, and predicting a future speed of the hybrid vehicle; generating a compensation value needed to compensate for the first startup reference value of the engine on the basis of a difference between the current speed and the future speed of the hybrid vehicle; acquiring a second startup reference value of the engine by compensating for the first startup reference value on the basis of the compensation value; and controlling a startup operation of the engine according to the second startup reference value acquired through compensation.

Abstract: An apparatus and method for controlling gear shift of a hybrid vehicle are provided. The apparatus and method prevent frequent gear shift by adjusting output of a driving motor or a gear shift time point of a transmission according to road condition or vehicle state while the hybrid vehicle is driven in a specific road condition or a specific vehicle state in a HEV mode. The apparatus includes a driving state detector that detects a road condition and a vehicle state and a controller that receives the road condition and the vehicle state from the driving state detector to differentiate and select a hybrid electric vehicle (HEV) mode into a normal mode and a compensation mode. The controller adjusts the output of a driving motor or a gear shift time point of a transmission according to different conditions from the driving state detector in the compensation mode.

Abstract: A system and a method for reducing exhaust gas of a hybrid electric vehicle are disclosed. A system for reducing exhaust gas of a hybrid electric vehicle according to an exemplary form of the present disclosure may include: a battery management system measuring a state of charge (SOC) of a high voltage battery of the hybrid electric vehicle; a motor control unit controlling a driving motor with power of the high voltage battery to generate motor driving force; an engine control unit controlling an engine to generate engine driving force; and a hybrid control unit checking an all electric range (AER) according to a driving in a charge depleting (CD) mode of the hybrid electric vehicle to perform a catalyst heating and warm up control by starting the engine in the CD mode in the case in which the checked AER exceeds a reference AER.

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 and system are provided for variably adjusted voltage of the LDC applied with an IBS (Intelligent Battery Sensor). The LDC output voltage control mode is determined in each of three driving modes, and the high electric loads are separated into two or more groups. The LDC output voltage value and the order priority are differentiated based on the durability of the auxiliary battery. Additionally, an LDC output voltage order table is generated according to the driving mode and the SOC state based on the auxiliary battery SOC information obtained from an IBS. Thus, consumed energy of the LDC and an energy consumption amount of the auxiliary battery are minimized, thus improving fuel efficiency.

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: An engine operation control apparatus and engine operation control method of a vehicle are provided. The engine operation control apparatus includes a coolant temperature sensor that detects a coolant temperature of a coolant line which passes through an engine. Further, the apparatus includes first and second maps in which corresponding engine operating points are mapped to a vehicle speed, a gear stage, a driver requesting torque, and an electric field load amount of the vehicle. A controller determines a candidate operating point using any one of the first and second maps based on a comparison between the coolant temperature and a predetermined threshold value and determines an optimal operating point of the engine using the candidate operating point.

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 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 driving control method for a hybrid vehicle has state of charge (SOC) ranges including a high SOC range, an intermediate SOC range and a low SOC range, and a plurality of power distribution strategies corresponding to the respective SOC ranges. The driving control method controls the hybrid vehicle using a power distribution strategy corresponding to an SOC range to which a current SOC of the hybrid vehicle belongs. When a speed of the hybrid vehicle is high or low and is outside a predetermined range, boundary values of the intermediate SOC range and the low SOC range among the SOC ranges are increased.

Abstract: An engine operation control apparatus and engine operation control method of a vehicle are provided. The engine operation control apparatus includes a coolant temperature sensor that detects a coolant temperature of a coolant line which passes through an engine. Further, the apparatus includes first and second maps in which corresponding engine operating points are mapped to a vehicle speed, a gear stage, a driver requesting torque, and an electric field load amount of the vehicle. A controller determines a candidate operating point using any one of the first and second maps based on a comparison between the coolant temperature and a predetermined threshold value and determines an optimal operating point of the engine using the candidate operating point.

Abstract: A system and a method for reducing exhaust gas of a hybrid electric vehicle are disclosed. A system for reducing exhaust gas of a hybrid electric vehicle according to an exemplary form of the present disclosure may include: a battery management system measuring a state of charge (SOC) of a high voltage battery of the hybrid electric vehicle; a motor control unit controlling a driving motor with power of the high voltage battery to generate motor driving force; an engine control unit controlling an engine to generate engine driving force; and a hybrid control unit checking an all electric range (AER) according to a driving in a charge depleting (CD) mode of the hybrid electric vehicle to perform a catalyst heating and warm up control by starting the engine in the CD mode in the case in which the checked AER exceeds a reference AER.

Abstract: A method of displaying a driver's propensity includes: determining a current drive mode, at a plurality of predetermined times, of a vehicle that is in operation, each determined current drive mode being selected from a plurality of predetermined drive modes; calculating cumulative ratios of each determined current drive mode by accumulating in real-time ratios of the current drive mode determined at each of the plurality of predetermined times; and simultaneously displaying the cumulative ratios of each determined current drive mode and the predetermined drive modes to inform the driver of the cumulative ratios.

Abstract: An engine idle operation control method and system are provided to improve the fuel efficiency of a vehicle through maintenance of efficient battery SOC and charge control during the engine-on for heating of a vehicle. The method includes receiving an engine-on request for heating of the vehicle and determining a road condition. A target charge power is determined and set as a value corresponding to the road condition and battery state information. A basic idle RPM set as a value corresponding to the road condition, the target charge power, and the outdoor temperature is determined. A compensation RPM and a target idle RPM are determined by compensating for the basic idle RPM by the compensation RPM to adjust the engine idle driving into the determined target idle RPM during the heating of the vehicle.

Abstract: A method and system are provided for variably adjusted voltage of the LDC applied with an IBS (Intelligent Battery Sensor). The LDC output voltage control mode is determined in each of three driving modes, and the high electric loads are separated into two or more groups. The LDC output voltage value and the order priority are differentiated based on the durability of the auxiliary battery. Additionally, an LDC output voltage order table is generated according to the driving mode and the SOC state based on the auxiliary battery SOC information obtained from an IBS. Thus, consumed energy of the LDC and an energy consumption amount of the auxiliary battery are minimized, thus improving fuel efficiency.