VOLTAGE VARIABLE CONTROL METHOD OF DIRECT CURRENT CONVERTER OF HYBRID VEHICLE

摘要

PROBLEM TO BE SOLVED: To relate to a voltage variable control method of a direct current converter for a hybrid vehicle which applies an IBS to the hybrid vehicle.SOLUTION: There is provided a voltage variable control method which can improve fuel economy by minimizing the energy consumption of an LDC and an energy consumption amount of an auxiliary battery by using: a point for deciding a control mode at each of main three traveling modes different from the decision of an LDC voltage control mode at each of existing seven pieces of traveling conditions in maximum; a point in which a high-electrical load is sorted into at least two groups by taking into consideration the durability of an auxiliary battery such as the control of the excessive charge and the excessive discharge of the auxiliary battery while an LDC output voltage is currently outputted at the same command value irrespective of a kind of a high-electrical load; and a point in which a command table of the output voltage is constructed depending on a traveling mode and an auxiliary battery SOC state on the basis of auxiliary battery SOC information which is sensed from an IBS.SELECTED DRAWING: Figure 6