System and method for controlling limp-home reverse traveling of hybrid electric vehicle

A method for operating a hybrid electric vehicle having a transmission excluding a reverse stage, the method comprising:

• generating a counter-electromotive force by a hybrid starter generator rotating with an engine when conditions are satisfied, including where starting of the engine is secured, a main relay is turned off, and an engine clutch is opened according to a request for reverse traveling, in a state where a component of a high-voltage system is failed;
• reversely rotating a motor using the counter-electromotive force of the hybrid starter generator for reverse traveling;
• operating an electronic load component using the counter-electromotive force of the hybrid starter generator;
• and
• determining an engine speed required by load output values according to operations of the motor and the electronic load component, and restricting the operation of the motor or the electronic load component according to a determined engine speed.

A method of operating a hybrid electric vehicle having a transmission excluding a reverse stage, the method comprising:

• confirming failure of a component of a high-voltage system;
• starting an engine;
• turning off a main relay;
• opening an engine clutch;
• reversely rotating a motor using counter-electromotive force of a hybrid starter generator for reverse traveling;
• operating an electronic load component;
• calculating a load output value of the motor and the electronic load component;
• determining an engine speed required by the calculated load output value;
• determining whether the determined engine speed is greater than a reference speed;
• in response to determining the determined engine speed is greater than the reference speed, outputting a signal for restricting operation of the motor or the electronic load component;
• and
• in response to determining the determined engine speed is less than or equal to the reference speed, continuing operations of the motor and the electronic load component.