ENGINE START SYSTEM OF HYBRID VEHICLE AND METHOD FOR CONTROLLING THE SAME

An engine start system of a hybrid vehicle includes a converter circuit unit converting voltage and outputting the converted voltage and a switch having a first terminal connected to an output terminal of the converter circuit unit and a second terminal selectively forming an electrical connection with the first terminal. A diode has an anode connected to the second terminal and a cathode connected to the first terminal. A battery is connected to the second terminal. A low-voltage starter connected to the battery and provides rotary power to start an engine in a stopped state by converting battery power into rotational energy. A controller opens the switch and supplies driving power to the low-voltage starter when the engine is started.