Control device for variable water pump

A control device for a variable water pump, the control device comprising:

• a stop control portion controlling the variable water pump to stop, when an engine provided with the variable water pump pressure-feeding a coolant is warmed up;
• a first drive control portion controlling the variable water pump to drive for a predetermined period at least before the stop control portion performs a control, when a coolant temperature in starting the engine is equal to or higher than a first predetermined value;
• an estimation portion estimating a coolant temperature in a predetermined part of the engine, when the engine is warmed up;
• a second drive control portion controlling the variable water pump to drive, when the coolant temperature estimated by the estimation portion is equal to or higher than a second predetermined value;
• and
• a third drive control portion controlling the variable water pump to pressure-feed a second flow rate of the coolant smaller than a first flow rate of the coolant, before controlling the variable water pump to pressure-feed the first flow rate of the coolant, in a case where an operational state of the variable water pump is shifted from a stop state into a drive state by the second drive control portion, and the third drive control portion controlling the variable water pump to pressure-feed the first flow rate of the coolant, when a predetermined period is elapsed from a time when the controlling the variable water pump to pressure-feed the second flow rate of the coolant is started.