Warm-up sytem and warm-up method for in-vehicle power train

摘要

In a warm-up system that pre-warms up of an engine by transferring heat from a heat source to an engine cooling water circulation circuit of a vehicle, a residential hot water circuit that uses a household heat source is provided as the heat source, and a one-touch connector is provided in the engine cooling water circulation circuit and the residential hot water circuit. The one-touch connector connects the two circuits prior to start-up of the engine such that heat is transferred to the engine cooling water circulation circuit, and disconnects the two circuits following heat transfer in preparation for start-up of the engine.