SYSTEM FOR PROMOTING WARMING-UP OF ENGINE

摘要

PROBLEM TO BE SOLVED: To provide a system for promoting warming-up of an engine capable of controlling the overheat of a heat exchanger even when heat is transferred from an exhaust gas circulating in a bypass passage for the purpose of promoting the warming-up by the circulatory arrest of coolant water. SOLUTION: The warming-up promotion system 1A includes: the engine 50; an electric W/P61 that changes the flow amount of the coolant water; a heat exchange part 33 in which the heat is exchanged between a refluxed exhaust gas and the coolant water; a bypass passage 36 to bypass the circulating of the exhaust gas from the heat exchange part 33; a boiling limit estimating means that estimates the boiling limit of the coolant water in the heat exchange part 33 based on the amount of the heat transfer to the coolant water exists in heat exchange part 33 from the exhaust gas circulating in the bypass passage 36; and a drive controller that controls to drives the electric W/P61 based on the boiling limit estimated by the boiling limitation estimation process. COPYRIGHT: (C)2011,JPO&INPIT