Method f0r Improving Engine Start Performance using Hardware Wake-Up Period and Vehicle thereof

摘要

Disclosed is a method for improving engine start performance using a hardware wake-up period control realized by a vehicle state detection mode to which a battery voltage, an engine oil temperature, and an engine coolant temperature are applied by a controller (1) under a key-off state of an engine, a wake-up fuel pressure control mode to decide whether to reach wake-up setting time when a key-off timer counts 80 minutes with respect to soaking time, a pump operation control mode to actuate a low pressure fuel pump (220), to which electric current is supplied, for about one second by a key-off output signal on a 80-minutes cycle, and a wake-up repetitive control mode to repeat the actuation number of the low pressure fuel pump (220) up to six times. Therefore, the method for improving engine start performance can prevent conversion of liquefied fuel into gaseous fuel caused by sudden pressure drop of remaining fuel in a fuel system (200) at the time of key-off after driving under high load, remove limitations by addition of hardware, and especially, prevent a function failure by dead battery since a battery state of charge (SOC) is applied to operating conditions of the low pressure fuel pump (220).