A control apparatus of a hybrid vehicle is provided, capable of charging the
battery
device when the state of charge of the battery device tends to decrease and the
initial state of charge of the battery device is reduced by a predetermined amount.
The present device comprises a lower limit threshold value setting device S060,
an upper limit threshold value setting device for setting the lower limit and upper
limit threshold values of the discharge amount of the battery device, a mode setting
device S054 for increasing the state of charge when the state of charge
is reduced to the lower limit threshold value, a mode setting release device S062
for releasing the mode setting changed by the mode setting device, and a discharge
depth detecting device S063 for detecting the discharge amount of the present
state of charge by comparison with the initial state of charge. The threshold value
for determining whether it is necessary for the motor to assist the engine is modified
depending upon the discharge depth.
