Heat management system for internal combustion engines

摘要

A heat management system for an internal combustion engine utilizes recirculated liquid coolant and provides a heat intensifying circuit to hasten engine warm-up and a heat dissipation circuit for use after the engine has warmed to a predetermined operating temperature. When the engine is cold, it is operated in such a way as to maximize heat rejection to the coolant circulating in the heat intensifying circuit, which may include a heat exchanger for warming air within a passenger compartment of a vehicle. The present system optimizes the location of maximum heat transfer, minimizes the amount of coolant heated during the warm-up period and increases the heat transferred to this coolant. After the warm-up period the coolant system actively cools both the cylinder head and engine block surfaces and the engine operating strategy is returned for normal engine operation.