Vehicle generating system for cold start, and control method of the same

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PURPOSE : A car power generation control system for a cold start and a control method thereof are provided to restrict power generation of an alternator at the early stages of an engine start, and maintain the restriction of the power generation of the alternator to the time when an engine is stabilized because a predetermined delay time passes according to the temperature of cooling water after the engine starts, thereby improving the performance of an engine start of a cold start.CONSTITUTION : A car power generation control system(1) includes an alternator(20) which uses the rotatory power of an engine(10) to generate electric power, and to which supplies the electric power to the electric load of a car; and a control unit(30) which controls the engine to start the generation of power of the alternator. A control method of a car power generation control system that controls power generation of an alternator is composed of the following steps. (i) The power generation of the alternator is controlled to be restricted at the early stages of an engine start. (ii) The point in time when an engine threshold rpm value is determined more than a predetermined threshold rpm value by judging whether the engine rpm value among the information which is monitored outside is more than a predetermined threshold rpm value or not is decided as a first point in time, and a delay time corresponding to the temperature of the monitored car information is calculated. (iii) Whether the calculated delay time reaches a passed second point in time or not is determined from the first point in time. (iv) The power generation of the alternator is controlled to start in case the delay time reaches the second point in time.[Reference numerals] (10) Engine; (46) Vehicle electronic unitCOPYRIGHT KIPO 2013