Engine cooling system with water pump recirculation bypass control

摘要

A cooling system has a system bypass to reduce parasitic losses in an internal combustion engine. The system bypass has a diverter valve actuated by a control module to selectively control the amount of coolant flow through the engine without regard to the speed of the water pump. As less coolant is needed to cool the engine, the diverter valve directs more coolant through the bypass to be recirculated to the water pump. The energy absorbed by the water pump is reduced by the reduced coolant flow, which increases the efficiency of the system and reduces engine parasitic losses.