Cooling circuit`s pump for coolant circulation in internal combustion engine, has valve setting circulation circuit in communication with another circuit at high functioning rate, and deviating coolant from latter circuit to former circuit

摘要

The pump has coolant circulation circuits (10, 20) with respective radial flow impellers (51, 52) associated to a rotary drive shaft (50), where the impeller (51) is placed outside a segment delimited by connecting nodes (N1, N2). The circuit (20) is located at its ends on the circuit (10) so that it constitutes a side outlet of the circuit (10). A valve (40) sets the circuit (20) in communication with the circuit (10) at high functioning rate of an internal combustion engine, and deviates a coolant from the circuit (10) to the circuit (20).