Electric water pump temperature control method for intelligent heat management for engine

Abstract

The invention discloses an electric water pump temperature control method for intelligent heat management for an engine. The electric water pump temperature control method for the intelligent heat management for the engine includes steps that setting delta T as the real-time water temperature difference between an inlet and an outlet of the engine (subtracting the water temperature at the inlet of the engine from the water temperature at the outlet of the engine) under the current working condition, setting delta Tmax-set as the upper limit value of the water temperature difference between the inlet and outlet of the engine set in a water pump control strategy, and setting delta Tmin-set as the lower limit value of the water temperature difference between the inlet and outlet of the engine set in the water pump control strategy; judging temperature under the real-time working condition, to be specific, if delta T is larger than delta Tmax-set, setting the temperature control target of the electric water pump as delta Tmax-set; if delta T is smaller than or equal to delta Tmax-set, further judging whether delta T is smaller than delta Tmin-set, if delta T is smaller than delta Tmin-set, setting the temperature control target of the electric water pump as delta Tmin-set; if delta T is larger than or equal to delta Tmin-set, setting the temperature control target of the electric water pump as delta T. Compared with the prior art, through regulating the water temperature difference between the inlet and outlet of the engine to improve the energy consumption, the rotating speed change frequency of accessories is effectively lowered, and the total energy consumption of the accessories is lowered.

Description

Technical field [0001] The invention relates to the technical field of internal combustion engine control, in particular to an electric water pump control strategy in an intelligent thermal management system for an internal combustion engine. Background technique [0002] With the increasing requirements for energy saving and emission reduction of automobiles, engine thermal management systems are facing new technical challenges. In the traditional engine thermal management system, the rotation speed of the water pump, fan and other accessories is rigidly coupled with the engine rotation speed. In some working conditions (especially under high rotation speed and medium and low load), energy consumption is wasted seriously. For this reason, the intelligent thermal management system represented by variable accessories such as electric water pumps and electric fans has attracted widespread attention in the industry. [0003] Intelligent thermal management system usually consists of e...

AI Technical Summary

Problems solved by technology

Since the operating conditions of the engine change rapidly, under this control strategy, the action of the accessories changes frequently, which will shorten the service life of the driven motor

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