Water pump with electronically controlled viscous coupling drive

A water pump for use in a coolant system to cool an engine comprising:

• a front housing;
• a water pump pulley coupled to said front housing, said water pump pulley having a threaded region;
• a drive belt coupled to said threaded region, said drive belt rotating at a rate proportional to a given engine speed;
• a water pump bearing assembly substantially coupled within said front housing;
• an input shaft rotatably coupled within said water pump bearing assembly and coupled to said water pump pulley;
• an input disk coupled to said input shaft;
• a driven disk fluidically coupled with said input disk, said driven disk and said input disk defining a working chamber therebetween;
• a water pump drive shaft coupled with said driven disk and substantially contained within a bearing assembly located within said rear housing;
• a plurality of impellers coupled to said water pump shaft and located within a coolant line of the cooling system, said plurality of impellers capable of directing an amount of coolant to the engine when rotated;
• and
• a stationary coil closely coupled to said driven disk, said stationary coil caplable of being electically stimulated to produce a magnetic field that flexes said driven disk away from said input disk.