Cooling system and method for a vehicle engine

摘要

The present invention relates to a cooling system for an internal combustion engine. The cooling system can be used in a hybrid electric vehicle. The system includes electric pumps in fluid communication with the engine and a control unit that governs the pumps. The pumps can be configured to supply fluid to either a cylinder block or cylinder head and backflow fluid through either the cylinder block or cylinder heads. Various arrangements of electrical and mechanical pumps are disclosed to control fluid flow and pressure.

主权项

1. A cooling system for an internal combustion engine, the internal combustion engine having a cylinder block and cylinder head, the system comprising:
a first pump in fluid communication with the engine, the first pump being an electric pump; a second pump in fluid communication with the engine, the second pump being an electric pump; a third pump arranged in parallel with at least one of the first and second pump; a control unit that governs the first pump and second pump; at least two fluid return channels configured to recirculate coolant to the pumps; and wherein the first pump is configured to supply coolant to the cylinder head; wherein the second pump is configured to supply coolant to the cylinder block; wherein the first and second pumps are arranged to backflow coolant through the engine.