A control method and control system for an engine thermal management module

Abstract

The application discloses a control method and control system of an engine thermal management module, which relate to the technical field of engine cooling system control. The control method includes: constructing a cavitation control strategy model and an economical control strategy model. The parameters of the cavitation control strategy model include engine The parameters of the economic control strategy model include the engine speed and water temperature; the engine speed, water temperature, and the opening of the thermal management module are obtained synchronously at continuous intervals; according to the acquired Rotate speed, water temperature, determine the thermal management module adopts cavitation control strategy or economical control strategy, obtain the target opening of the thermal management module; according to the obtained target opening, control the opening of the thermal management module. This application judges whether the thermal management module adopts the cavitation control strategy according to the engine speed and water temperature, which can effectively reduce the risk of water pump cavitation of the engine and increase the reliability of the engine.

Description

technical field [0001] The present application relates to the technical field of engine cooling system control, in particular to a control method and control system for an engine thermal management module. Background technique [0002] In line with the trend of automobile energy saving and emission reduction, automobile engines gradually use thermal management modules instead of traditional thermostats to control the flow rate of coolant in the circulation branch of the engine cooling system to achieve temperature control to achieve better fuel consumption and emission effects. [0003] Under the limitation of the working principle of the thermostat, when the temperature of the engine cooling system is low, the small circulation is fully opened and the large circulation is fully closed; when the temperature of the engine cooling system rises, the opening of the small circulation is reduced, and the opening of the large circulation is increased. Large, until the small circula...

AI Technical Summary

Problems solved by technology

Although such a control form can reduce the flow of coolant inside the engine body and radiator to reduce heat dissipation and increase the warm-up speed, it is also easy to cause rapid engine acceleration and the valve opening of the thermal management module is small, and the water pump Negative pressure and cavitation are generated before the engine, which is not conducive to the reliability of the engine, especially in winter or high latitude areas, which greatly increases the reliability risk of engine cavitation

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