| 摘要 |
PROBLEM TO BE SOLVED: To charge a battery or to stop idling more accurately in accordance with deterioration of the battery in a hybrid vehicle provided with an internal combustion engine as a power source and an electric motor powered by a battery using this electric motor to charge the battery. SOLUTION: The extent of deterioration of the battery is judged by detecting its internal resistance R. The charging and discharging of the battery and the idling stop are controlled in association with the detected internal resistance R. If the resistance R is lower than a given value R1, a threshold adapted to initial conditions for each control is used. On the other hand, if the resistance R is equal to or larger than the given value R1, the threshold is changed in accordance with the resistance R. When the battery is charged to the full-charge level with regenerative energy generated by the electric motor in its deceleration operation, for instance, the target charged level tSOC1 of the battery in the steady-state operation is changed to a value (tSOCli-α) lower than the value tSOC1i under the initial conditions (S24). |
