| CPC B60W 20/13 (2016.01) [B60K 6/40 (2013.01); B60W 2510/0657 (2013.01); B60W 2510/244 (2013.01); B60W 2710/0666 (2013.01)] | 6 Claims |
|
1. A hybrid vehicle, comprising:
an engine which generates power by combustion of fuel;
a drive motor which generates power, and is selectively operated as a generator to generate electrical energy;
a battery which is connected to the drive motor and supplies electrical energy to the drive motor and charges the electrical energy generated in the drive motor;
a battery management system which measures a State of charge (SOC) value of the battery; and
a controller which is configured to determine a final target torque of the engine in a Hybrid Electric Vehicle (HEV) mode based on an SOC section in which the SOC value of the battery measured in the battery management system belongs,
wherein the SOC section includes:
a first section in which the SOC value is equal to or greater than a first setting value;
a second section in which the SOC value is between the first setting value and a second setting value which is smaller than the first setting value; and
a third section in which the SOC value is smaller than the second setting value,
wherein when the SOC value of the battery belongs to the first section, the controller is configured to determine an engine torque determined in an optimal operating line as the final target torque and control the engine to output the final target torque,
wherein when the SOC value of the battery belongs to the second section, the controller is configured to determine a larger value between a smaller value between a required torque of a driver and an intermediate stage part-load maximum torque and a base target torque of the engine which is the engine torque determined in the optimal operating line as the final target torque,
wherein the intermediate stage part-load maximum torque is determined by multiplying a part-load maximum torque after correction and a correction coefficient, and
wherein the correction coefficient is a ratio of the part-load maximum torque after correction to the part-load maximum torque before correction.
|