Patent ID: 8944017
Filing Date: 2015-02-03
Classification: F01P

Abstract:
1. A cooling system for a powertrain; wherein the powertrain has an engine and a transmission driven by the engine, the cooling system comprising: an engine heat exchanger in thermal communication with engine oil in the engine; a transmission heat exchanger in thermal communication with transmission fluid in the transmission; a pump having a pump inlet and a pump outlet; a plurality of coolant flow passages through which coolant is pumped by the pump; a valve assembly in fluid communication with the pump outlet and having a first and a second position that at least partially establish different coolant flow modes through the coolant flow passages; wherein the valve assembly has: wherein the first position of the valve assembly fluidly connects the first inlet to the single outlet and blocks flow from the second inlet to establish a first of said coolant flow modes; wherein the second position of the valve assembly fluidly connects the second inlet to the single outlet and blocks flow from the first inlet to establish a second of said coolant flow modes; and wherein the valve assembly is operable to move from the first position to the second position in response to a first predetermined operating condition.