Heat management control method and system for engine

Abstract

The invention provides heat management control method and system for an engine, and belongs to the field of vehicles. The heat management control method comprises the following steps of judging a current working state of the engine; acquiring the air inlet temperature, the water outlet temperature and the cylinder block temperature of the engine; and according to the current working state, the airinlet temperature, the water outlet temperature and the cylinder block temperature of the engine, the flow of cooling liquid among an engine cylinder block, an engine cylinder cover, a heat radiatorand a warm wind core body of a vehicle is controlled, so that the working temperature of the engine is controlled. The invention further provides the corresponding heat management system. According tothe heat management control method and the system provided by the invention, the engine can be protected, meanwhile, the fuel economy of the engine is effectively improved, and the emission is reduced.

Description

technical field [0001] The invention relates to the field of vehicles, in particular to a thermal management control method and system for an engine. Background technique [0002] At present, the temperature control of the engine is usually realized by a wax-type thermostat with main and auxiliary valves. The thermostat controls the opening and closing of the main valve and the auxiliary valve at the same time, thereby controlling the size and circulation of the coolant pipeline. When the engine starts, the temperature of the engine cooling water is low. At this time, the main valve of the thermostat is closed, while the auxiliary valve is open. The engine cooling water circulates in a small cycle instead of cooling through the radiator, so the engine is not cooled. Realize engine warm-up. When the engine water temperature rises to a certain level, the paraffin wax in the sensor body of the thermostat melts and expands, pushing the axis of the push rod inside to move, so th...

AI Technical Summary

Problems solved by technology

[0003] However, the role of this traditional cooling system is to reliably protect the engine, and seldom consider factors such as fuel economy and emissions. The heat dissipation capacity of the engine cooling system generally meets the heat dissipation requirements of the engine at full load, because the heat generated by the engine is the largest at this time.

However, at part load, the cooling system suffers from a power loss, the water pump provides more coolant flow than required, and the engine is overcooled, resulting in emissions that do not meet regulatory requirements and increased fuel consumption

[0004] Therefore, the existing heat management method of the engine cannot effectively take into account the fuel economy and emission reduction of the engine when considering the protection of the engine

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