Method and system for controlling acceleration torque of hybrid vehicle

摘要

A method and a system for controlling acceleration torque of a hybrid vehicle that can give sufficient acceleration without imposing burden on a battery by changing a maximum torque of a vehicle according to environmental variables are disclosed. The method sets a creep torque as a minimum torque; calculates a maximum torque that can be output from an engine considering of engine environmental variables; calculates a maximum torque that can be output from a motor considering of motor environmental variables; calculating maximum torque of the vehicle by adding up the maximum torque that can be output from the engine and the maximum torque that can be output from the motor; and calculates acceleration torque by using a position of an accelerator pedal, the minimum torque, and the maximum torque of the vehicle.

主权项

1. A method for controlling acceleration torque to manage a state of charge (SOC) of a battery of a hybrid vehicle, comprising:
setting, by a control portion, a creep torque as a minimum torque; calculating, by the control portion, maximum torque that can be output from an engine based engine environmental variables wherein the engine environmental variables are detected by a detector, wherein the engine environment variables include an altitude of the vehicle, engine friction torque, and an engine oil temperature; calculating, by the control portion, maximum torque that can be output from a motor based on motor environmental variables wherein the motor environmental variables are detected by the detector, wherein the motor environmental variables include motor temperature and the SOC of the battery; calculating, by the control portion, maximum torque of the vehicle by combining the maximum torque that can be output from the engine and the maximum torque that can be output from the motor; calculating, by the control portion, acceleration torque by using a position of an accelerator pedal, the minimum torque, and the maximum torque of the vehicle; calculating, by the control portion, an engine division torque and a motor division torque which the engine and the motor respectively output, using the acceleration torque; and controlling, by the control portion, the engine and the motor using the engine division torque and the motor division torque to manage the SOC of the battery at an optimal level.